奥地利专利AT519203A1 Backgauge for a bending machine

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专利摘要:
The invention relates to a backgauge (15) for a Hinteranschlagpositioniersystem a bending machine. The back stop (15) comprises a stop finger (18) on which at least one stop surface (17) is formed, a base unit (21) which is designed for coupling with the back stop positioning system (14), wherein the stop finger (18) by means of a linear guide (29 ) is coupled to the base unit (21) and the stop finger (18) relative to the base unit (21) between a pushed forward working position (28) and a retraction position (30) is displaceable, characterized in that the stop finger (18) and the Basic unit (21) are coupled to a first spring element (34) by means of which the stop finger (18) is biased into its working position (28) and that a locking device (41) is formed, by means of which the stop finger (18) selectively in the working position (28) is lockable or released for displacement against the spring force of the first spring element (34) in its retracted position (30).
公开号:AT519203A1
申请号:T50921/2016
申请日:2016-10-14
公开日:2018-04-15
发明作者:
申请人:Trumpf Maschinen Austria Gmbh & Co Kg；
IPC主号:

专利说明:

Summary
The invention relates to a backgauge (15) for a backgauge positioning system of a bending machine. The back stop (15) comprises a stop finger (18) on which at least one stop surface (17) is formed, a base unit (21) which is designed for coupling with the back stop positioning system (14), the stop finger (18) being formed by means of a linear guide (29 ) is coupled to the base unit (21) and the stop finger (18) is displaceable relative to the base unit (21) between a forward pushed working position (28) and a retracted position (30), characterized in that the stop finger (18) and the Base unit (21) are coupled to a first spring element (34), by means of which the stop finger (18) is pretensioned in its working position (28) and that a locking device (41) is designed, by means of which the stop finger (18) is optionally in the working position (28) can be locked or released for displacement against the spring force of the first spring element (34) into its retracted position (30).
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The invention relates to a backgauge for a backgauge positioning system of a bending machine, and to a method for positioning the backgauge.
From DE 3739949 C1 a backgauge for a sheet metal bending machine is known, in which a stop finger can be displaced relative to a basic unit. The stop finger can be locked by means of a locking pin which can be moved into a corresponding bore in a guide rail.
The backgauge known from DE 3739949 C1 has the disadvantage that when the safety function of the stop finger is activated, the automatic operation of the stop finger is available to a limited extent.
A backgauge is known from EP 2 915 604 A1, in which a stop finger can be displaced relative to a base unit if a predetermined force is exceeded and a magnetic fixation is thereby released.
The backgauge known from EP 2 915 604 A1 has the disadvantage that the predetermined force for releasing the magnetic fixation must be chosen to be correspondingly low in order to ensure that the safety function is maintained. The necessarily weak dimensioning of the magnetic fixation can, however, lead to the fact that it is also unintentionally released when sheet metal workpieces are struck.
The object of the present invention was to overcome the disadvantages of the prior art and to provide an apparatus and a method
N2016 / 13500-AT-00 len, by means of which a backgauge can be positioned with increased safety, while the full functionality of the backgauge should be retained.
This object is achieved by a device and a method according to the claims.
According to the invention, a backgauge is designed for a backgauge positioning system of a bending machine. The rear stop comprises a stop finger on which at least one stop surface is formed, a base unit which is designed for coupling to the rear stop positioning system, the stop finger being coupled to the base unit by means of a linear guide, and the stop finger relative to the base unit between a forward-pushed working position and a retracted position is movable. The stop finger and the base unit are coupled to a reset device, in particular a first spring element, by means of which the stop finger is biased into its working position. Furthermore, a switchable locking device is designed, by means of which the stop finger can optionally be locked in the working position or is released for displacement, in particular against the spring force of the first spring element, into its retracted position.
An advantage of the design of the backgauge according to the invention is that the stop finger is prestressed in its working position by means of the first spring element. It can thereby be achieved that the stop finger is moved back into its working position after a shift as soon as an action force causing the shift is removed again. Furthermore, the stop finger can either be locked in its working position by means of the locking device or released for displacement against the spring force of the first spring element. In particular, the stop device can be used to implement a stop mode in which the stop finger is locked in its working position and is thus designed to stop sheet metal workpieces to be bent. If the locking device is deactivated, the rear stop is in a so-called safety mode or travel mode in which the stop finger can be moved relative to the base unit, only the spring force of the first spring element being over 3/50
N2016 / 13500-AT-00 must be wounded. The spring force of the first spring element is chosen to be correspondingly low, since when the backgauge moves, in addition to the spring force of the first spring element, the inertia of the stop finger acts on the obstacle.
Furthermore, it may be expedient if the fixing device comprises a holding part, in particular an electromagnet, the stop finger being lockable relative to the base unit by applying activation energy in the holding part. The advantage here is that an electromagnet can be easily activated or deactivated in an automated bending machine. In addition, electricity is available as an energy source for the electromagnet on every bending machine. Compared to a mechanical locking system, an electromagnet also has the advantage that no mechanically displaceable components are formed which are subject to wear or need to be serviced. An electromagnet can thus have an increased service life.
In addition, it can be provided that the locking device has a mechanically acting locking unit. The stop finger can be fixed in its position relative to the base unit by means of the mechanically acting locking unit.
In a first exemplary embodiment, it can be provided, for example, that the mechanically acting locking unit of the fixing device is designed to produce a positive connection between the stop finger and the base unit. Such a positive connection can be achieved, for example, by means of a shaped element which is arranged on the base unit and which is inserted into a corresponding recess in the stop finger.
In particular, it can be provided that the shaped element has a wedge surface. It can thereby be achieved that the positioning accuracy of the rear stop unit can be increased, since the stop finger can be pressed into its working position by the wedge surface.
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Alternatively, it can be provided that the shaped element can be designed, for example, in the form of a dowel pin. Such a dowel pin can also have a conical shape, for example, in order to be able to achieve an exact positioning of the stop finger.
The shaped element can be inserted into the recess of the stop finger by means of actuators of various designs. The actuators can be designed, for example, in the form of pneumatic or hydraulic cylinders, electrical linear or rotary drives or electromagnets.
In an alternative variant, provision can be made for the mechanically acting locking unit to comprise a clamping device and for a frictional connection to be established, rather than a positive one.
Of course, it is also conceivable that the positive connection can be established by means of a micro-toothing.
Furthermore, it can be provided that a second spring element is formed, which is coupled to the stop finger and the base unit by interposing the locking device, the stop finger being fixed in its working position by means of the second spring element when the locking device is locked. The advantage here is that when the locking device is locked, the stop finger is not completely rigidly coupled to the base unit, but that the stop finger is also biased into its working position in addition to the spring force of the first spring element and the spring force of the second spring element. As a result, the stop finger can be moved out of its working position against the action of the two spring elements in the event of an excessively large action force. This enables the entire backgauge unit to be protected. Another advantage is that force peaks, caused by the sheet striking the stop finger more violently, are partially absorbed by the spring. The second spring element can be interposed in all different types of locking devices.
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In addition, it can be provided that the second spring element has a greater spring stiffness than the first spring element and / or that the second spring element has a greater pretension than the first spring element. The advantage here is that the stop finger is only pretensioned into its working position by means of the first spring element, and that when the second spring element is switched on selectively, the pretension of the stop finger can be increased many times over into its working position.
The first spring element can, for example, have a spring stiffness between 0.01 N / mm and 1N / mm, in particular between 0.1 N / mm and 0.5 N / mm, preferably approximately 0.2 N / mm. In addition, the first spring element can have a pretension between 1 N and 15 N, in particular between 3 N and 10 N, preferably approximately 7 N.
The second spring element can, for example, have a spring stiffness between 0.1 N / mm and 30N / mm, in particular between 1 N / mm and 10 N / mm, preferably approximately 2 N / mm. In addition, the first spring element can have a pretension between 20 N and 600 N, in particular between 160 N and 450 N, preferably approximately 250 N to 300 N.
Also advantageous is a configuration according to which it can be provided that the holding part of the fixing device is received on the basic unit so that it cannot be displaced in the main adjustment direction, and that the fixing device has a counter element which interacts with the holding part and is arranged on a guide rod, the guide rod at least is mounted on a first bearing jaw, the counter element being arranged on an end region of the guide rod and the second spring element being arranged opposite the counter element on the guide rod with respect to the first bearing jaw.
Alternatively, it can also be provided that the electromagnet is immovably received on the base unit and that the locking device has a counter element which interacts with the electromagnet and is arranged on a guide rod, the guide rod being on / 50
N2016 / 13500-AT-00 a first bearing jaw and a second bearing jaw are mounted, which are arranged at a distance from one another, the counter-element being arranged closer to the first bearing jaw near an end region of the guide rod lying outside the two bearing jaws in accordance with a flying bearing. This structure of the backgauge enables the functionality of the optionally lockable stop finger to be implemented as efficiently as possible, the overall structure of the backgauge being as simple as possible.
Furthermore, it can be expedient if the guide rod is mounted with a bearing play in the first bearing jaw, so that a slight angular rotation and / or radial displacement between the guide rod and the first bearing jaw is made possible.
It can also be provided that the guide rod is additionally mounted on a second bearing jaw, the first bearing jaw and the second bearing jaw being arranged at a distance from one another.
According to a development, it is possible for a stop element for the second spring element to be formed on the guide rod, the second spring element being designed as a compression spring and being accommodated between the first bearing jaw and the stop element on the guide rod, as a result of which the stop element is removed by means of the second spring element first bearing jaws away and thereby the counter element is biased towards the first bearing jaw. This measure allows the second spring element to be positioned in the backgauge as simply as possible. In addition, the stop finger can be biased into its working position.
Furthermore, it can be provided that the holding part is designed as an electromagnet and the counter element is designed as a disk which interacts with the electromagnet and is arranged on the end face of the guide rod, the electromagnet and the counter element abutting one another on contact surfaces. The advantage here is that such a connection can be switched with a very short switching time.
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Furthermore, it can be provided that the electromagnet and / or the counter element are received on an articulated bearing, so that the contact surfaces can be aligned parallel to one another. The advantage here is that the air gap between the two contact surfaces can be reduced by this measure and thereby the holding force of the magnet can be increased.
In a further development it can be provided that the joint bearing comprises a universal joint or a ball joint. The advantage here is that such articulated bearings are easy to manufacture and also have a high resistance.
Furthermore, it can be expedient if a buffer element is formed which serves to dampen the stop finger when moving into the retracted position. The advantage here is that this measure protects the backgauge.
In addition, it can be provided that the linear guide is designed in the form of a recirculating ball guide. A recirculating ball bearing guide has the advantage that it runs as smoothly as possible and therefore the spring force of the first spring element can be selected to be as low as possible.
Furthermore, it can be provided that the linear guide comprises a guide carriage which is coupled to the stop finger and comprises a guide rail which is coupled to the base unit.
According to a special embodiment, it is possible for the basic unit to have a base part which is coupled to the rear stop positioning system and to have a cover part which is fastened to the base part by means of fastening means. With this measure it can be achieved that the backgauge can be easily assembled or simply dismantled in the event of maintenance.
According to an advantageous development, it can be provided that the two bearing jaws are attached to the cover part. The advantage here is that the bearing jaws are easily accessible through this measure.
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In particular, it can be advantageous if the guide rail is attached to the cover part.
It can further be provided that two of the second spring elements are arranged parallel to one another. This has the advantage that the pretensioning of the stop finger in its working position can be increased, the individual second spring elements not having to have an excessively high spring stiffness, but rather the spring stiffness of the two second spring elements is added. This can save weight.
In addition, it can be provided that a force sensor is designed, which is designed to detect the amount of an acting force. This measure allows the impact force of a sheet metal workpiece to be struck to be recorded. This makes it possible for the machine operator to signal when the sheet metal workpiece is in contact with the stop finger with a predefined stop force and the sheet metal workpiece is thus correctly positioned.
Also advantageous is a configuration according to which it can be provided that the first bearing jaw is arranged closer to the stop surface than the second bearing jaw.
According to a further development, it is possible for at least one display element to display the state of the locking device to be arranged on the stop finger. The advantage here is that the status of the locking device can be displayed to the machine operator by the display element and the machine operator is thereby informed whether the bending machine is ready to stop the sheet metal workpiece to be bent.
Furthermore, it can be expedient if a sensor element is formed, which is used to detect a relative movement and / or relative position between the stop finger and the base unit. The advantage here is that this measure moves the stop finger relative to the base unit / 50
N2016 / 13500-AT-00 can be detected and a movement of the backgauge can be stopped in time.
In addition, it can be provided that the sensor element is in the form of an inductive sensor. An inductive sensor in particular has a high detection accuracy and a short detection time.
According to the invention, a method for positioning the backgauge is provided by means of a backgauge positioning system of a bending machine. The process comprises the following process steps:
- Setting a traversing mode of the backgauge, with the locking device not being locked and with the backing finger being biased into its working position by means of a reset device, in particular a first spring element;
- Moving the backgauge into its predetermined stop position by means of the backgauge positioning system;
- Lock the stop finger in its working position by means of the locking device.
An advantage of the method according to the invention is that when the backgauge is positioned, a so-called travel mode or safety mode can be set in which the stop finger can be displaced relative to the base unit. As a result, the stop finger can move relative to the base unit when touching an obstacle, such as the hand of a machine operator, in order not to injure the machine operator. The displacement path is in particular chosen to be so large that, upon detection, the touch of the stop finger on the obstacle can stop the movement of the backgauge within this displacement path.
According to a particular embodiment, it is possible for the relative movement and / or relative position between the stop finger and the base unit to be monitored by means of the sensor element during the travel mode of the backgauge and when a relative movement between the stop finger and the base unit is detected while the backgauge is being moved, / 50
N2016 / 13500-AT-00 the movement is stopped abruptly. The advantage here is that this measure the necessary displacement of the stop finger relative to
Basic unit can be kept as low as possible.
For a better understanding of the invention, this will be explained in more detail with reference to the following figures.
Each show in a highly simplified, schematic representation:
Fig. 1 a perspective view of an embodiment of a bending machine; Fig. 2 a perspective view of an embodiment of a backgauge in an oblique view from above; Fig. 3 a perspective view of an embodiment of a backgauge in an oblique view from below; Fig. 4 a sectional view of the backgauge in a first sectional plane, wherein the stop finger is in the working position; Fig. 5 a sectional view of the backgauge in the first sectional plane, wherein the stop finger is in the retracted position and the locking device is not activated; Fig. 6 a sectional view of the backgauge in the first sectional plane, wherein the stop finger is in the retracted position and the locking device is activated; Fig. 7 a sectional view of the backgauge in a second sectional plane, wherein the stop finger is in the retracted position and the locking device is not activated; Fig. 8 a perspective view of another embodiment of the backgauge with only a first bearing jaw;
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9 shows a schematic sectional illustration of a further exemplary embodiment of the backgauge with only a first bearing jaw and a guide rod which is equipped with a ball joint;
10 shows a schematic sectional illustration of a further exemplary embodiment of the backgauge with a positively engaging holding element;
Fig. 11 is a schematic sectional view of a further embodiment of the backgauge with a holding element in the form of a pneumatic cylinder.
To begin with, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, and the disclosures contained in the entire description can be applied analogously to the same parts with the same reference numerals or the same component names. The location information selected in the description, e.g. above, below, to the side, etc., referring to the figure described and illustrated immediately, and if the position is changed, these are to be applied accordingly to the new position.
A workpiece processing machine and a method for operating a workpiece processing machine using a bending machine or press brake as an exemplary embodiment are described in detail below. At this point, it should be noted that the following information can of course also be applied to other types of workpiece processing machines in which automatically controlled stop devices with stop fingers are used to position workpieces, or that a person skilled in the technical field can find the description below Teaching can also be applied to other types of workpiece processing machines.
1 shows an embodiment of a workpiece processing machine 1 in the form of a bending machine 2, in particular a press brake 3. The workpiece processing machine 1 or press brake 3 is for processing, especially 12/50
N2016 / 13500-AT-00 especially intended for bending a workpiece 4. The press brake 3 has a fixed table beam 6 oriented perpendicular to a contact surface 5. For machining workpieces 4, the bending machine 2 or the press brake 3 shown comprises a press beam 7, which can be adjusted or moved in the vertical direction relative to the table beam 6 by means of drive means 8, for example hydraulic cylinders 9.
The processing or reshaping of a workpiece 4 is carried out in the press brake 3 according to the exemplary embodiment shown in FIG. 1 by means of a lower bending tool 10 and an upper bending tool 11. Here, the lower bending tool 10, for example a so-called bending die, can be arranged in a lower tool holder 12 of the table beam 6. An upper bending tool 11 or a so-called bending punch can be arranged in an upper tool holder 13 of the press beam 7.
The bending tools 10, 11 are usually arranged or held interchangeably in the tool holders 12, 13, so that suitable bending tools 10, 11 can be selected or used for a respective machining or forming of a workpiece 4. Of course, it is also possible for a plurality of lower bending tools 10 and upper bending tools 11 to be arranged in the tool holders during operation of the press brake 3, for example in order to be able to carry out different bending processes on a workpiece 4 in successive forming or bending operations. For reasons of clarity, only one lower bending tool 10 and one upper bending tool 11 are shown in the exemplary embodiment according to FIG. 1.
In the press brake 3 shown as an exemplary embodiment in FIG. 1, at least one automatically controlled rear stop positioning system 14 with at least one rear stop 15 for positioning the workpiece 4 is also shown. The backgauge 15 is only shown schematically and is described or illustrated in more detail in the further figures.
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In the illustrated embodiment, two backgauge positioning systems 14, each with a backgauge 15, are shown as examples.
The rear stop positioning systems 14 or rear stops 15 shown in FIG. 1 are arranged in a free space on a rear side of the table beam 6 of the bending machine 2. The one or more back stops 15 can each be adjusted or moved into a stop position 16 provided for positioning a workpiece 4. If a rear stop 15 is adjusted to a stop position 16, a workpiece 4 to be machined can then be placed against a stop surface 17 of a stop finger 18 of the rear stop 15 from a front side or a workpiece feed side of the workpiece processing machine 1 pointing away from the press space. As a result, the workpiece 4 can be positioned in a desired position between the two bending tools 10, 11 in order to be able to carry out a bending process at a desired position.
The stop fingers 18 shown by way of example in FIG. 1 have only one stop surface 17. In principle, design variants of stop fingers 18 can also include more than one stop surface 17, as well as additional support surfaces for workpieces 4.
The backgauge positioning systems 14 and backgauges 15 shown in FIG. 1 are usually adjusted or moved by means of drive arrangements (not shown in more detail). The drive arrangements can include, for example, guideways and actuators such as electric motors, in particular servomotors, and are driven automatically.
A control device 19 can be provided to control the movement or adjustment movements of the backgauge positioning system 14 or of the backgauge 15. As indicated in FIG. 1, the control device 19 can have a plurality of components, for example a plurality of processors or computer components, input means for inputting control commands, output means for displaying information, etc. Furthermore, it is also possible for the control device 19 with further control components / 50
N2016 / 13500-AT-00 is connected, for example with mobile input and output means via a network, or via the Internet.
In the case of bending machines 2, an adjustment or an automated movement of the back stops 15 along at least one main adjustment direction 20 can be provided. In addition, the back stops 15 can also be adjusted automatically in the longitudinal direction of the bending machine 2 or in terms of their height.
Basically, there is a risk of collision of the stop finger 18 with other objects, for example a hand of an operator, in the case of automatically controlled movement or adjustment movements of the rear stop positioning system 14 or of the rear stop 15. Therefore, the backgauge 15, as described in more detail in the further figures, is equipped with a safety function in order to protect the operator.
In Figures 2 and 3, the backgauge 15 is shown in a perspective view obliquely from above and obliquely from below. 4 to 6, the backgauge 15 is shown cut in a first sectional plane, different positions of the backgauge 15 being shown. In Figures 7 and 8, the backgauge 15 is shown in further sectional views.
The same reference numerals or component designations are used for the same parts as in the previous figures. In order to avoid unnecessary repetition, reference is made to the detailed description in the previous figures or reference is made, the following description being based on the illustration in FIGS. 2 to 8.
The back stop 15 has a stop finger 18 and a base unit 21. The stop finger 18 is slidably received in the main adjustment direction 20 relative to the base unit 21. The base unit 21 has a coupling device 22, by means of which the rear stop 15 is fastened to the rear stop positioning system 14.
As can be seen from FIGS. 2 and 3, it can be provided that the base unit 21 has a base part 23, on which a cover part 24 is arranged. The / 50
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Coupling device 22 is preferably arranged on the base part 23 of the basic unit 21. The cover part 24 can, in particular, by means of fastening means 25
Screws may be arranged on the base part 23 of the base unit 21.
As can also be seen from FIGS. 2 and 3, it can be provided that the stop finger 18 has an exchangeable fingertip 26 on which the stop surface 17 is formed. The stop surface 17 is preferably arranged at right angles to the main adjustment direction 20. In addition, it can also be provided that various recesses 27 are formed, which also have a stop surface 17.
4-6, the backgauge unit 15 is shown in different positions, with a sectional view with the same sectional plane being selected in all three FIGS. 4-6. In the sectional view, the cover part 24 was also shown in an exploded view in order to better illustrate and describe the function of the backgauge 15. The following description is based on an overview of Figures 4-6.
4, the stop finger 18 is in its advanced working position 28, which can also be referred to as the basic position. 4, a linear guide 29 is formed, by means of which the stop finger 18 is slidably received on the base unit 21. By means of the linear guide 29, the stop finger 18 can be displaced between the working position 28 pushed forward and a retracted position 30 pushed back. The linear guide 29 is designed such that the stop finger 18 can be displaced relative to the basic unit 21 in the main adjustment direction 20 between the working position 28 and the retracting position 30.
The linear guide 29 preferably comprises a guide slide 31 which is received on a guide rail 32 so as to be displaceable in the main adjustment direction 20.
The guide carriage 31 can be mounted on the guide rail 32 by means of a recirculating ball bearing.
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Alternatively, it is also conceivable for a sliding bearing, such as a dovetail guide, to be formed between the guide slide 31 and the guide rail 32.
As can also be seen from FIG. 4, it can be provided that two of the guide slides 31 are formed and are arranged at a distance 33 from one another. The formation of two guide carriages 31 has the advantage that the stop finger 18 can be subjected to an increased force, in particular an increased bending load.
In addition, a first spring element 34 is provided, by means of which the stop finger 18 is biased into its working position 28. The first spring element 34 is designed in particular as a compression spring and is arranged between an end face 35 of the stop finger 18 and an end face 36 of the base unit 21. Instead of the first spring element 34, a further reset device, such as a pneumatic cylinder, a gas spring, an electric linear drive and the like, can also be provided.
It can further be provided that a guide pin 37 is formed, on which the first spring element 34 is received. The guide pin 37 can be rigidly coupled to the stop finger 18 or can be received on the latter. Furthermore, it can be provided that a stop bar 38 is formed on the base unit 21, on which the end face 36 is designed to bear the first spring element 34.
A bushing 39 can be formed on the stop bar 38, through which the guide pin 37 is guided. On the side of the stop bar 38 opposite the first spring element 34, a securing ring 40, in particular an axial securing ring, can be arranged on the guide pin 37. The stop finger 18 can be held in its working position 28 by means of the locking ring 40, the locking ring 40 resting against the stop bar 38 in the working position 28 of the stop finger 18.
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Furthermore, a locking device 41 is formed, by means of which the stop finger 18 can be fixed in its working position 28. The locking device 41 can comprise a holding part 42a which interacts with a counter element 43. In the present exemplary embodiment it can be provided that the holding part 42a is in the form of an electromagnet 42b.
In particular, it can be provided that the electromagnet 42b is received on a magnet holder 44. The magnet holder 44 can be coupled to the cover part 24 of the base unit 21 by means of fastening means 45, in particular screws. In other words, it can be provided that the electromagnet 42b is rigidly or non-displaceably received on the base unit 21.
The counter element 43, on the other hand, is motion-coupled to the stop finger 18. In particular, it can be provided that the counter element 43 is designed in the form of a magnet which interacts with the electromagnet 42b.
It can further be provided that the counter element 43 is received on a guide rod 46, the guide rod 46 being received on a first bearing jaw 47 and on a second bearing jaw 48 so as to be displaceable in the main adjustment direction 20. The first bearing jaw 47 and the second bearing jaw 48 are arranged at a distance 49 from one another and attached to the stop finger 18.
The counter element 43 is preferably arranged on an end region 50 of the guide rod 46. The end region 50 of the guide rod 46 projects freely relative to the first bearing jaw 47.
It can further be provided that a second spring element 51 is arranged on the guide rod 46 between the first bearing jaw 47 and the second bearing jaw 48. The second spring element 51 can in particular be designed as a compression spring and bear against the first bearing beam 47 and against a stop element 52 which is arranged on the guide rod 46.
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The spring force of the second spring element 51 pushes the stop element 52, which is arranged between the first bearing jaw 47 and the second bearing jaw 48, towards the second bearing jaw 48. As a result, the counter element 43 is also pressed in the direction of the second bearing jaw 48 or the first bearing jaw 47. In other words, both the first bearing jaw 47 and the second bearing jaw 48, which are coupled to the stop finger 18 by means of fastening means 53, are pressed towards the counter element 43 by the second spring element 51.
If current is now applied to the electromagnet 42b and thus its magnetic effect is developed and the counter-element 43 adheres to the electromagnet 42b, the stop finger 18 is biased into the working position 28 with the force of the second spring element 51 and with the force of the first spring element 34 or pressed into this.
If an action force 54, applied by the workpiece 4, now acts on the stop surface 17 and the electromagnet 42b is activated, the second spring element 51 and the first spring element 34 counteract the action force 54.
If the spring force of the two spring elements is less than the action force 54, the stop finger 18 together with the two bearing jaws 47, 48 arranged thereon is pressed in the direction of the retracted position 30 and thus displaced relative to the guide rod 46, since the counter element 43 adheres to the electromagnet 42b.
Such a shifted position is shown in Fig. 6. This shift occurs when the action force 54 is greater than a maximum allowable action force, which would damage the backgauge 15. Due to the possibility of displacing the stop finger 18 against the force of the second spring element 51, force peaks which occur as a result of impacts when large workpieces 4 are struck can be absorbed.
Furthermore, it can be provided that a buffer element 55 is formed, which is arranged between the stop finger 18 and the stop bar 38 and is designed to buffer an impact.
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If the electromagnet 42b is deactivated, the counter-element 43 does not adhere to the electromagnet 42b and thus the second spring element 51 no longer acts against the displacement of the stop finger 18 if, in this state, the action force 54, for example by the hand of a machine operator, is greater than the low spring force of the first spring element 34, the stop finger 18 can be displaced relative to the base unit 21, as shown in FIG. 5.
If the action force 54 is now removed again, the stop finger 18 shifts back into its working position 28 due to the spring force of the first spring element 34. A displacement path 56 of the stop finger 18 between the working position 28 and the retracting position 30 is preferably chosen to be large enough that one predetermined travel speed of the backgauge 15 in the main adjustment direction 20 and the impact of the stop finger 18 against an obstacle, there remains sufficient travel path to brake the backgauge positioning system 14 with a maximum permissible acceleration.
Furthermore, it can be provided that a sensor element 57 is arranged on the rear stop 15, by means of which a relative movement between the stop finger 18 and the base unit 21 or a relative position between the stop finger 18 and the base unit 21 can be detected. A collision with an object can be signaled to the control device 19 by means of the sensor element 57.
It can be seen from FIG. 7 that the guide rail 32 of the linear guide 29 is coupled to the cover part 24 of the basic unit 21.
8 that it can be provided that two of the second spring elements 51 are formed in the rear stop 15.
Furthermore, it can be provided that a force sensor 60 is arranged between a second end region 58 of the guide rod 46 and a rear wall 59 of the stop finger 18, which is designed to detect the pretensioning force of the second spring element 51. When the solenoid 42b is activated and / 50
N2016 / 13500-AT-00 the counter element 43 adheres to the electromagnet 42b, then it is at
Force sensor 60 measured force of the force of the second spring element 51 minus the action force 54 reduced by the force of the first spring element 34.
If the action force 54 is now the same as the spring force of the first spring element 34 and the second spring element 51, then a force with size zero is measured at the force sensor 60. If the action force 54 is increased further, the guide rod 46 lifts completely from the force sensor 60 and the force zero is still measured at the force sensor 60.
A display element 61 can be formed on the stop finger 18, in particular on the stop surface 17, by means of which the activation of the locking device 41 can be displayed. The display element 61 can be designed, for example, in the form of LED displays. Furthermore, it can be provided that the action force 54 is determined by means of the force sensor 60 and that this is also displayed on the display element 61 when the action force 54 is reached in a predetermined force range.
In a special bending mode for bending particularly thin or particularly large workpieces 4, it can be provided that the back stop 15 is designed to pick up the workpiece 4. This can be achieved in particular by moving the backgauge 15 as far as possible in front of the table beam 6 in order to insert the workpiece 4. The workpiece 4 is then placed on the back stop 15 and pressed against the stop surface 17. By means of the force sensor, the action force 54 on the stop surface 17 is detected, and subsequently the back stop 15 is moved away from the table beam 6 into its stop position 16, the workpiece 4 constantly resting on the back stop 15 and thereby preventing an excessive deflection of the workpiece 4.
FIG. 8 shows a perspective view of a further possible construction of the backgauge 15, the same reference numerals or component designations being used for the same parts as in the previous FIGS. 1 to 7. To avoid unnecessary repetitions, the de21 / 50
N2016 / 13500-AT-00 waisted description in the previous figures 1 to 7 referred to.
As can be seen from FIG. 8, it can be provided that the guide rail 32 is arranged on the base unit 21 of the rear stop 15 and that the stop finger 18 is slidably received on the base unit 21 by means of the guide slide 31. Furthermore, the first spring element 34 is shown schematically, which biases the stop finger 18 into its working position 28. In addition, the first bearing jaw 47 is coupled to the stop finger 18 and is displaceable together with it. In the first bearing jaw 47, the guide rod 46 is received, which is displaceable relative to the first bearing jaw 47.
The stop element 52 is formed at an end section of the guide rod 46. The second spring element 51 is received or preloaded between the first bearing jaw 47 and the stop element 52. The stop element 52 is pressed away from the first bearing jaw 47 by the second spring element 51. The counter element 43 is coupled to the guide rod 46 on the side of the first bearing jaw 47 opposite the stop element 52. The counter element 43 interacts with the electromagnet 42b, which is coupled to the base unit 21.
As can be seen from FIG. 8, it can be provided that in the fixed state of the rear stop 15, a contact surface 62 of the electromagnet 42b interacts with a contact surface 63 of the counter element 43. In order to ensure that the two contact surfaces 62, 63 lie as snugly as possible against one another, it can be provided that the counter element 43 is coupled to the guide rod 46 via an articulated bearing 64. As a result, the two contact surfaces 62, 63 can be aligned parallel to one another. As can be seen from FIG. 8, it can be provided that the joint bearing 64 is designed in the form of a universal joint.
Such a universal joint or joint bearing 64 can of course not only be used to receive the counter element 43, but is / 50
N2016 / 13500-AT-00 it is also possible that the joint bearing 64 for receiving the electromagnet
42b is formed and is arranged between the electromagnet 42b and the base unit. Such a design of the backgauge 15 is not shown separately.
FIG. 9 shows a schematic illustration of a further exemplary embodiment of the backgauge 15, the same reference numerals or component designations being used for the same parts as in the previous FIGS. 1 to 8. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS. 1 to 8.
As can be seen from FIG. 9, it can be provided that the counter element 43 is rigidly coupled to the guide rod 46 and that the complete guide rod 46 together with the counter element 43 is received in the first bearing jaw 47 so that it can pivot slightly. For this purpose, the bearing point between the first bearing jaw 47 and the guide rod 46 is designed in the form of a play bearing, so that a slight angular swivel or a slight radial displacement between the guide rod 46 and the first bearing jaw 47 can be compensated for. For centering the guide rod 46 between the counter element 43 and the first bearing jaw 47, the joint bearing 64 is designed in the form of a spherical head. As a result, the contact surface 63 of the counter element 43 can be adapted to the contact surface 62 of the electromagnet 42b.
When the locking device 41 is activated, the counter element 43 is held on the electromagnet 42b and the first bearing jaw 47 together with the stop finger 18 is displaced relative to the guide rod 46, as a result of which the second spring element 51 is compressed.
To detect the acting force 50 applied to the stop surface 17, it can further be provided that the force sensor 60 is designed in the form of a tensile force measuring unit between the electromagnet 42b and the base unit 21.
/ 50
N2016 / 13500 AT-00
FIG. 10 shows a further exemplary embodiment of the backgauge unit 15, the same reference numbers or component designations being used for the same parts as in the previous FIGS. 1 to 9. In order to avoid unnecessary repetitions, reference is made to the detailed description in the preceding FIGS. 1 to 9.
As can be seen from FIG. 10, it can further be provided that the locking device 41 is designed to lock the guide rod 46 by means of a positive connection. In particular, it can be provided that a notch 65 is arranged in the guide rod 46, by means of which a shaped element 66 interacts, the shaped element 66 being designed for insertion into the notch 65. The shaped element 66 is pushed into the notch 65 in the securing direction 67, as a result of which the guide rod 46 is locked.
The stop finger 18 is positioned in its working position 28 in that an end stop is formed on the base unit 21 and the stop finger 18 is pressed against this end stop by means of the first spring element 34.
Furthermore, it can be expedient if the shaped element 66 has a wedge surface 68. This can ensure that the guide rod 46 can be locked in the working position 28 of the stop finger 18.
As shown schematically in FIG. 10, an adjusting device 69 is formed, by means of which the shaped element 66 can be displaced in the securing direction 67. The securing direction 67 is formed transversely to the main adjustment direction 20. The adjusting device 69 can also comprise an electromagnet 42b, by means of which the shaped element 66 can be pushed into the notch 65. In particular, it can be provided here that the shaped element 66 is received on a guide rod which is slidably mounted in the electromagnet 42b. Furthermore, a spring element can be formed, by means of which the shaped element 66 can be brought out of engagement with the notch 65 again when the electromagnet 42b is released. Furthermore, it can be provided that the force sensor 60 is coupled to the holding part 42a and the action force 54 can thereby be determined.
/ 50
N2016 / 13500 AT-00
Another embodiment variant of the backgauge 15 is shown in FIG. 11, again using the same reference numerals or component designations for the same parts as in the previous FIGS. 1 to 10. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS. 1 to 10.
As can be seen from FIG. 11, it can be provided that the holding part 42a of the locking device 41 is in the form of a pneumatic cylinder which has a pressing head 70 which interacts with a pressing projection 71 of the stop finger 18. The stop finger 18 can be pressed against an end stop by the pressure head 70 and can thus be prestressed in its working position 28. In particular, it can be provided that the force sensor 60 is designed as an end stop against which the stop finger 18 is pressed. As a result, the action force 54 can be detected.
Furthermore, a buffer element 72 can be formed, which can be arranged next to the force sensor 60 and protects the force sensor 60 against excessive shock loads. The buffer element 72 can be designed, for example, in the form of a hydraulic shock absorber.
When the pneumatic cylinder is extended and the drive head 70 is pressed against the stop finger 18, the pneumatic cylinder itself can act as a second spring element 51, since the air acting in the pneumatic cylinder is compressible. By presetting the pressure in the pneumatic cylinder, the spring force of the second spring 51 can thus be adjusted.
To deactivate the locking device 41, the pneumatic cylinder is retracted into its retracted position and thus the stop finger 18 is released for movement in the main adjustment direction 20, with only the low spring force of the first spring element 34 biasing the stop finger 18 into its working position 28.
The exemplary embodiments show possible design variants, it being noted at this point that the invention is not restricted to the specially illustrated design variants thereof, but rather also various Kom25 / 50
N2016 / 13500-AT-00 combinations of the individual design variants with each other are possible and this variation option is possible due to the teaching of technical action through objective invention in the ability to do in this technical field
Expert lies.
The scope of protection is determined by the claims. However, the description and drawings are to be used to interpret the claims. Individual features or combinations of features from the different exemplary embodiments shown and described can represent independent inventive solutions. The object on which the independent inventive solutions are based can be found in the description.
All information on value ranges in the objective description should be understood to include any and all sub-areas, e.g. the information 1 to 10 is to be understood in such a way that all sub-areas starting from the lower limit 1 and the upper limit 10 are also included, i.e. all sub-areas begin with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or
5.5 to 10.
For the sake of order, it should finally be pointed out that, for a better understanding of the structure, elements have been partially shown to scale and / or enlarged and / or reduced.
/ 50
N2016 / 13500 AT-00
LIST OF REFERENCE NUMBERS
1 Werkstückbearbeitungsma- 29 linear guidemachine 30 return position 2 bending machine 31 guide carriage 3 press brake 32 guide rail 4 workpiece 33 Distance guide carriage 5 footprint 34 first spring element 6 bench beam 35 End face of the stop finger 7 pressing bars 36 End face basic unit 8th drive means 37 guide pins 9 hydraulic cylinders 38 stop bar 10 lower bending tool 39 execution 11 upper bending tool 40 circlip 12 lower tool holder 41 Locking device 13 upper tool holder 42 a holding part 14 Hinteranschlagpositioniersys- 42 b electromagnettem 43 counter-element 15 back gauge 44 magnetic holder 16 stop position 45 fastener 17 stop surface 46 guide rod 18 stop finger 47 first bearing jaws 19 control device 48 second bearing jaw 20 Hauptverstellrichtung 49 Distance between bearing jaws 21 basic unit 50 End section of guide rod 22 coupling device 51 second spring element 23 Base part basic unit 52 stop element 24 Cover part basic unit 53 fastener 25 Fastener cover part 54 impact force 26 fingertip 55 buffer element 27 recess 56 displacement 28 working position 57 sensor element
/ 50
N2016 / 13500-AT-00 second end section guide rod
Back wall stop fingers
force sensor
display element
Electromagnet contact surface
Contact surface counter element
joint bearing
score
forming element
fuse direction
wedge surface
locking device
pressure head
pressuring
Buffer element / 50
N2016 / 13500 AT-00

权利要求:
Claims (22)
[1]
claims
1. backstop (15) for a backstop positioning system (14) of a bending machine (2), the backstop (15) comprising a stop finger (18) on which at least one stop surface (17) is formed, a base unit (21) which is for coupling with the Back stop positioning system (14) is formed, the stop finger (18) being coupled to the base unit (21) by means of a linear guide (29) and the stop finger (18) relative to the base unit (21) between a forward pushed working position (28) and one Retraction position (30) is displaceable, characterized in that the stop finger (18) and the base unit (21) are coupled to a reset device, in particular a first spring element (34), by means of which the stop finger (18) is moved into its working position (28) is biased and that a switchable locking device (41) is formed, by means of which the stop finger (18) optionally in the working position (28) arr can be set or released for displacement, in particular against the spring force of the first spring element (34), into its retracted position (30).
[2]
2. Backstop according to claim 1, characterized in that the locking device (41) comprises a holding part (42a), in particular an electromagnet (42b), the stop finger (18) relative to the base unit (21) being applied by applying activation energy in the holding part (42a) ) can be locked.
[3]
3. backgauge according to claim 1, characterized in that the locking device (41) has a mechanically acting locking unit.
[4]
4. backgauge according to claim 3, characterized in that the mechanically acting locking unit of the locking device (41) is designed to produce a positive connection between the stop finger (18) and the base unit (21).
29/50
N2016 / 13500 AT-00
[5]
5. backstop according to one of the preceding claims, characterized in that a second spring element (51) is formed, which is coupled with the interposition of the locking device (41) with the stop finger (18) and the base unit (21), with locking of the locking device (41) the stop finger (18) is fixed in its working position (28) by means of the second spring element (51).
[6]
6. backgauge according to claim 5, characterized in that the second spring element (51) has a greater spring stiffness than the first spring element (34) and / or that the second spring element (51) has a greater bias than the first spring element (34).
[7]
7. back gauge according to one of claims 2 to 6, characterized in that the holding part (42a) of the locking device (41) relative to the base unit (21) in the main adjustment direction (20) is immovably received on this and that the locking device (41) with a the counterpart (43) cooperating with the holding part (42a), which is arranged on a guide rod (46), the guide rod (46) being mounted on at least a first bearing jaw (47), the counter element (43) being connected to an end region (50 ) the guide rod (46) is arranged and the second spring element (51) is arranged on the guide rod (46) opposite the counter element (43) with respect to the first bearing jaw (47).
[8]
8. backgauge according to claim 7, characterized in that the guide rod (46) is supported with a bearing clearance in the first bearing jaw (47), so that a slight angular rotation and / or radial displacement between the guide rod (46) and the first bearing jaw (47) enables is.
[9]
9. back gauge according to one of claims 2 to 8, characterized in that the guide rod (46) is additionally mounted on a second bearing jaw (48), the first bearing jaw (47) and the second bearing jaw (48) at a distance (49 ) are arranged to each other.
30/50
N2016 / 13500 AT-00
[10]
10. back gauge according to claim 8 or 9, characterized in that on the guide rod (46) a stop element (52) for the second spring element (51) is formed, wherein the second spring element (51) is designed as a compression spring and between the first bearing jaws (47) and the stop element (52) on the guide rod (46), whereby the stop element (52) by means of the second spring element (51) away from the first bearing jaw (47) and thereby the counter element (43) to the first bearing jaw (47 ) is biased.
[11]
11. Backgauge according to one of claims 2 to 10, characterized in that the holding part (42a) is designed as an electromagnet (42b) and the counter element (43) is designed as a disk which interacts with the electromagnet (42b) and which is on the end face of the guide rod (46) is arranged, the electromagnet (42b) and the counter element (43) abutting against one another on contact surfaces (62, 63).
[12]
12. Back gauge according to claim 11, characterized in that the electromagnet (42b) and / or the counter element (43) are received on a joint bearing (64), so that the contact surfaces (62, 63) can be aligned parallel to one another.
[13]
13. backgauge according to claim 12, characterized in that the joint bearing (64) comprises a universal joint or a ball joint.
[14]
14. Back stop according to one of the preceding claims, characterized in that a buffer element (55) is formed, which serves to dampen the stop finger (18) when moving into the retracted position (30).
[15]
15. Back gauge according to one of the preceding claims, characterized in that the linear guide (29) is designed in the form of a recirculating ball guide.
31/50
N2016 / 13500 AT-00
[16]
16. Back stop according to one of the preceding claims, characterized in that the linear guide (29) comprises a guide carriage (31) which is coupled to the stop finger (18) and comprises a guide rail (32) which is coupled to the base unit (21) is.
[17]
17. back gauge according to one of the preceding claims, characterized in that a force sensor (60) is formed, which is designed to detect the amount of an action force (54).
[18]
18. Back stop according to one of the preceding claims, characterized in that at least one display element (61) for displaying the state of the locking device (41) is arranged on the stop finger (18).
[19]
19. Back stop according to one of the preceding claims, characterized in that a sensor element (57) is formed, which serves to detect a relative movement and / or relative position between the stop finger (18) and the base unit (21).
[20]
20. Back gauge according to claim 19, characterized in that the sensor element (57) is designed in the form of an inductive sensor.
[21]
21. A method for positioning a backgauge (15) according to one of the preceding claims, by means of a backgauge positioning system (14) of a bending machine (2), characterized in that the method comprises the following method steps:
- Setting a travel mode of the backgauge (15), wherein the locking device (41) is not locked and wherein the stop finger (18) is biased into its working position (28) by means of a reset device, in particular a first spring element (34);
- Moving the backgauge (15) by means of the backgauge positioning system (14) into its predetermined stop position (16);
32/50
N2016 / 13500 AT-00
- Locking the stop finger (18) in its working position (28) by means of the locking device (41).
[22]
22. The method according to claim 21, characterized in that during the travel mode of the backgauge (15) by means of the sensor element (57) the relative movement and / or relative position between the stop finger (18) and the base unit (21) is monitored and upon detection of a relative movement between the stop finger (18) and the base unit (21) during the movement of the backgauge (15), the movement is stopped abruptly.
33/50
N2016 / 13500-AT-00 i_r>
TRUMPF machines
GmbH & Co. KG.
austria
34/50
0 ^ 1
TRUMPF Maschinen Austria
GmbH & Co. KG.
35/50
GmbH & Co. KG.
36/50
Ι_ΓΊ
TRUMPF Maschinen Austria
GmbH & Co. KG.
37/50
TRUMPF Maschinen Austria
GmbH & Co. KG.
38/50
1_ΤΊ
TRUMPF Maschinen Austria
GmbH & Co. KG.
39/50 ι_η
TRUMPF Maschinen Austria
GmbH & Co. KG.
40/50 ι_η
41/50
TRUMPF Maschinen Austria
GmbH & Co. KG.
42/50
TRUMPF Maschinen Austria
GmbH & Co. KG.
43/50
GmbH & Co. KG.
44/50

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同族专利:

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US20190217358A1|2019-07-18|

US11267030B2|2022-03-08|

EP3525950B1|2021-12-01|

WO2018068074A1|2018-04-19|

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法律状态:

优先权:

申请号 | 申请日 | 专利标题

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CN201780063481.2A| CN109843461B|2016-10-14|2017-10-13|Backstop for bending machine and method for positioning backstop|

PCT/AT2017/060262| WO2018068074A1|2016-10-14|2017-10-13|Backgauge for a bending machine and method for positioning a backgauge of this kind|

JP2019519991A| JP7032393B2|2016-10-14|2017-10-13|How to position back gauges and back gauges for bending machines|

US16/335,953| US11267030B2|2016-10-14|2017-10-13|Backgauge for a bending machine and method for positioning a backgauge of this kind|

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