• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for monitoring a production plant (1) and a production plant (1) for free bending of a workpiece (2) to be produced from a sheet metal by means of a bending press (3). The bending press (3) comprises a machine frame (7), a lower and an upper press beam (13, 16), a bending tool (4) and a safety system (28) with at least one safety device (29, 33, 37) comprising at least one transmitting device (31, 35, 39) and at least one detection device (32, 36, 40), wherein from the safety device (29, 33, 37) a monitoring area (30, 34, 38) is defined. Furthermore, a control device (24) and an input terminal (25) are provided. A first monitoring area (30) defined by a first safety device (31) is arranged running in front of the front side (43) of the upper press bar (16).
    公开号:AT520726A4
    申请号:T50187/2018
    申请日:2018-03-07
    公开日:2019-07-15
    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 method for monitoring a production system (1) and a production system (1) for bending a workpiece (2) to be manufactured from a sheet by means of a bending press (3). The bending press (3) comprises a machine frame (7), a lower and an upper press beam (13, 16), a bending tool (4) and a safety system (28) with at least one safety device (29, 33, 37) comprising at least one transmission device (31, 35, 39) and at least one detection device (32, 36, 40), a monitoring area (30, 34, 38) being defined by the security device (29, 33, 37). A control device (24) and an input terminal (25) are also provided. A first monitoring area (30) defined by a first security device (31) is arranged in front of the front side (43) of the upper press beam (16).
    Fig. 1
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    The invention relates to a method for monitoring a danger zone of a production system for free bending or embossing a workpiece to be manufactured from a sheet by means of a bending press in front of its upper press beam. Furthermore, the invention also relates to a production system with a safety system for free bending or embossing a workpiece to be manufactured from a sheet by means of a bending press.
    In a previously known safety system for press brakes, cutting machines, punching machines, as described in DE 197 17 299 A1, the transmitter device and the detection device were each held in an adjustable manner on holding arms firmly connected to the upper press beam. The monitoring area with the two measuring beams running at a distance from one another is located in the area of the lower end of the upper bending die, which faces the bending die located below. A change in the relative position of the transmission device and the detection device with respect to the upper press beam was only made for adjustment and adjustment activities depending on the length or height of the upper punch. Otherwise, there was a rigid attachment to the upper press beam and associated fixed adjustment with it. This enabled the danger area between the punch and the bending die of the bending tool to be monitored in the direct bending and processing area of the workpiece.
    The object of the present invention was to overcome the disadvantages of the prior art and to provide a method for monitoring a danger zone in a production system and a production system with a safety system, by means of which a user can pinch them
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    N2017 / 34000-AT-00 is to be protected between a section of the workpiece to be swung up during the bending process and the upper press beam. Furthermore, damage to the upper press beam or devices or devices located thereon should also be prevented.
    This object is achieved by a method for monitoring a danger zone in a production system and by a production system for free bending or embossing a workpiece to be manufactured from a sheet metal by means of a bending press according to the claims.
    The method is used to monitor a production system for free bending or stamping bending of a workpiece to be made from sheet metal by means of a bending press, the following steps being carried out:
    Providing the bending press, in particular a press brake, with a machine frame, a lower press beam, an upper press beam and tool receptacles arranged or formed on the press beams, the upper press beam having a front side, a rear side, a first front end area, a second front end area and an upper longitudinal front side and has a lower longitudinal end face,
    Providing at least one bending tool with at least one bending punch and at least one bending die,
    Providing a security system with at least one security device comprising at least one transmission device and at least one detection device, a monitoring area being defined by the at least one security device,
    Providing a control device and an input terminal, wherein the security system and the input terminal are communicatively connected to the control device, a first monitoring area being defined by a first security device of the security system, and the first monitoring area being arranged in front of the front of the upper press beam in such a way that at a first entry of an object into the first surveillance area
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    Signal is generated by the first safety device and forwarded to the control device.
    It is advantageous in the method steps selected here that the space located in front of the front of the upper press beam is monitored by the provision of at least one first safety device, and when an object or a body part of the machine operator penetrates, the first safety device detects the penetration and a corresponding first one Signal is generated. This first signal is forwarded to the control device and a predefined measure is initiated and / or carried out by the latter. For example, the downward adjustment speed of the upper press beam can be reduced, which can result in the bending process being stopped and stopped. By recognizing and detecting an object penetrating into the first monitoring area of the first safety device, a warning signal could also be issued in order to signal this to the machine operator.
    A variant of the method is also advantageous in which the control device, upon receipt of the first signal, reduces the adjustment speed of the upper press bar in the direction of the lower press bar with respect to a preset adjustment speed or one specified by the control device. By reducing the adjustment speed of the upper press beam, the swiveling speed of the workpiece to be manufactured can be reduced to such an extent that, for example, by issuing a warning signal, the machine operator can quickly remove the body part in the area in front of the upper press beam, in particular the hand or fingers. without jamming or crushing the same between the workpiece and the upper press beam. However, this can also slightly increase the response time until the object penetrates the second monitoring area.
    Furthermore, a procedure in which a second security device is provided, a second monitoring area being defined by the second security device, and the second monitoring area also being advantageous
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    N2017 / 34000-AT-00 is arranged in front of the front of the upper press beam and that when an object enters the second monitoring area, a second signal is generated by the second security device and forwarded to the control device. By providing at least one second safety device, which is also arranged in front of the front side of the upper press beam, an additional monitoring area can be created in order to be able to carry out an even more secure and staggered monitoring of the area in front of the front side of the upper press bar. Depending on the arrangement of the security devices, events staggered in time or different in time, which signal an intrusion into at least one of the monitoring areas, can thus be reliably detected. In this way, security against physical damage or damage to the bending press can be prevented even more reliably.
    A further advantageous procedure is characterized in that an emergency stop command is generated by the control device when the second signal is received and the adjustment movement of the upper press bar towards the lower press bar is stopped. Since the second safety device with its second monitoring area is arranged closer to the front or front surface of the upper press beam, the downward movement must be switched off quickly in order to be able to safely prevent injury to the operator or damage to the upper press beam and any components arranged thereon.
    A variant of the method is also advantageous, in which the at least one first safety device is only activated by the control device when a start command for the start of the bending process is entered and / or that the at least one second safety device is only activated when a start command for the start of the bending process is entered the control device is activated. In order to avoid unnecessary switching operations, the first safety device and / or the second safety device is only activated and put into operation at the beginning of the bending process. This creates the possibility as long as there is no bending process and no downward movement of the associated
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    N2017 / 34000-AT-00 upper press beam is carried out, activities in the monitored area or zone can be carried out without triggering the security system.
    However, the object of the invention is also achieved independently of this by a production system designed according to the invention, which is used for free bending or embossing of a workpiece to be produced from a sheet by means of a bending press. The production system includes:
    a bending press, in particular a press brake, with a machine frame, a lower press beam, an upper press beam and tool holders arranged or formed on the press beams, the upper press beam having a front side, a rear side, a first front end area, a second front end area and an upper longitudinal front side and one has the lower longitudinal end face, at least one bending tool with at least one bending punch and at least one bending die, a security system with at least one security device comprising at least one transmission device and at least one detection device, a monitoring area being defined by the at least one security device, a control device and an input terminal, the Security system and the input terminal are communicatively connected to the control device, and thereby define one of at least one first security device of the security system The first monitoring area is arranged in front of the front of the upper press beam.
    The advantage achieved thereby is that by providing at least one first safety device, the space located in front of the front of the upper press beam is monitored and when an object or a body part of the machine operator penetrates, the first safety device detects the penetration and a corresponding first signal is generated.
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    This first signal is forwarded to the control device and a predefined measure is initiated and / or carried out by the latter. For example, the downward adjustment speed of the upper press beam can be reduced, which can result in the bending process being stopped and stopped. By recognizing and detecting an object penetrating into the first monitoring area of the first safety device, a warning signal could also be issued in order to signal this to the machine operator.
    Furthermore, it can be advantageous if a second security device is provided with at least one second monitoring area, which at least one second monitoring area is also arranged in front of the front of the upper press beam. By providing at least one second safety device, which is also arranged in front of the front of the upper press beam, an additional monitoring area can be created so that the area in front of the front of the upper press beam can be monitored even more reliably and in a staggered manner. Depending on the arrangement of the security devices, events staggered in time or different in time, which signal an intrusion into at least one of the monitoring areas, can thus be reliably detected. In this way, security against physical damage or damage to the bending press can be prevented even more reliably.
    Another embodiment is characterized in that the first monitoring area is arranged at a greater distance in front of the front of the upper press beam than the second monitoring area. Due to the staggered spacing of the two monitoring areas at a normal distance from the front of the upper press beam, staggered and sequential safety measures can be forwarded from the control device to the drive unit of the bending press. Thus, when an object penetrates into the first monitoring area, for example the adjustment speed of the upper press bar, can be reduced
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    N2017 / 34000-AT-00. This can be sufficient to prevent the upper press beam or a component arranged on it from being pinched or damaged. However, if an intrusion of an object into the second monitoring area, which is arranged closer to the front, is also detected, this usually leads to an immediate stop of the downward movement of the upper press bar. These commands or signals are forwarded by the control device to the drive unit of the bending press.
    A further possible embodiment has the features that the first monitoring area is arranged in a first monitoring level and the second monitoring area is arranged in a second monitoring level, and the two monitoring levels are arranged at a distance from one another. By arranging the surveillance areas in their own surveillance levels, a flat, flat surveillance zone can be created. Depending on the thickness or strength of the light or data signal, each of the monitoring areas or each of the monitoring zones forms a kind of curtain between the transmitter device and the detection or reception device.
    Another embodiment provides that the first monitoring level and the second monitoring level of the two monitoring areas are arranged to run parallel to one another. This means that the same distances can always be ensured over the area of the monitoring levels or monitoring areas. This means that the same time intervals for the control of the machine can be maintained over the entire monitoring area of the respective monitoring levels.
    Another embodiment is characterized in that the first transmission device and the second transmission device are arranged on the upper press bar in its first end area and the first detection device and the second detection device on the upper press bar are arranged in the second end area opposite the first end area. By arranging the transmission devices and the detection devices separately from one another in each case in the front end regions of the upper press beam which are spaced apart from one another, a simple construction of the security system can thus be made possible.
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    In addition, a large amount of space can be created in front of the front surface of the upper press beam without any annoying attachments.
    Another preferred embodiment is characterized in that the first transmission device and the second transmission device are arranged on the upper press bar in the area of one of its longitudinal end faces and the first detection device and the second detection device on the upper press bar in the area of the longitudinal end face opposite this. In this way, faultless and reliable detection and detection of the intrusion of an object can also take place in each of the monitoring areas and this event can be signaled to the control device.
    Furthermore, it may be advantageous if the first transmission device and the first detection device are arranged at a distance from each other at one of the front end regions of the upper press beam in the direction of the longitudinal extent of the upper press beam and that at least the second transmission device is arranged on the upper press beam in the region of one of the longitudinal end faces is. By arranging the data signals emitted by the transmitting devices in a mutually intersecting manner, even more reliable monitoring of the space in front of the front or front surface of the upper press beam can be made possible. Due to the intersecting arrangement of the respective data signals or light beams in each of the monitoring areas, an even more sensitive detection of penetrating objects can be ensured.
    Another alternative embodiment is characterized in that the second detection device is arranged in the area of the same longitudinal end face on the upper press beam as the second transmission device or that the second detection device is arranged on the upper press bar in the area of the longitudinal end face opposite the second transmission device. The provision and arrangement of a reflector on one of the longitudinal end faces thus makes it possible to arrange both the second transmitting device and the second detection device only in the region of the other longitudinal end faces. With an opposing arrangement of transmitter and Er
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    N2017 / 34000-AT-00 detection device can also detect an interruption in the data signal, in particular the light beam, and thus the intrusion of an object can be detected.
    A further possible and possibly alternative embodiment has the features that a third safety device is provided with at least one third transmitter device and at least one third detection device and a third monitoring area defined by the third safety device for monitoring an immediate bending area between the bending die and the bending die of the bending tool is. By providing a third safety device, the immediate bending area can also be monitored and the safety can thereby be further increased.
    A further embodiment provides that the third safety device is arranged on the upper press beam, in particular in the area of its opposite end areas. In this way, a third safety device traveling with the upper press beam can also be created for the bending area so that the immediate bending processes and the associated danger area can always be safely monitored.
    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:
    Figure 1 shows a manufacturing system with a bending press and schematically indicated safety system, in front view.
    2 shows an upper press bar of the bending press with the safety system arranged in front of the press bar, in a side view;
    Fig. 3 shows the upper press beam of the bending press with a further possibility of arranging the safety system.
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    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.
    The term “in particular” is understood in the following to mean that it may be a more specific training or more detailed specification of an object or a method step, but does not necessarily have to represent a mandatory, preferred embodiment of the same or a mandatory procedure.
    1 shows a highly schematically simplified illustration of a production system 1, which in the present case is designed in particular for the free bending of workpieces 2 to be produced from sheet metal by means of die bending.
    The production system 1 used for the bending in the present case comprises a bending machine, in the present exemplary embodiment a bending press 3, in particular a press brake or a press brake, for producing the workpieces 2 or work parts between at least one bending tool 4 that can be adjusted relative to one another. The bending tool 4 in the present exemplary embodiment comprises at least one bending punch 5, but mostly several bending dies 5, and at least one bending die 6, but mostly several bending dies cooperating therewith. The at least one bending punch 5 is arranged above the workpiece 2 to be manufactured on the bending press 3 and is also held there accordingly, in particular kept clamped. The at least one bending die 6 is also held on the bending press 3, in particular held clamped thereon.
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    In such bending presses 3, the coordinate system is basically referred to as the “X” direction, which runs in a horizontal plane and in a vertical orientation with respect to the longitudinal extent of the bending tool 4, in particular its bending die 5 and bending die 6. Thus, this is the direction which also corresponds to the feed direction or the removal direction. The “Y” direction is understood to mean the vertical direction, which thus runs in the height direction of the bending tool 4 and furthermore in the vertical or normal direction with respect to the horizontal plane. Finally, the “Z” direction is understood to be that direction which runs in the longitudinal direction or in the longitudinal extent of the bending tool 4, in particular its bending punch 5 and bending die 6. The longitudinal extent of the bending edge defined by the bending tool 4 is thus also aligned in the “Z” direction.
    A machine frame 7 of the bending press 3 comprises, for example, a base plate 8, on which vertically projecting, spaced from one another in the transverse direction and parallel to each other side walls 9, 10 are arranged. These are preferably connected to one another at their end regions spaced apart from the base plate 8 by a solid transverse assembly 11, for example formed from a sheet metal molded part.
    The side cheeks 9, 10 can be approximately C-shaped to form a free space for the shaping of the workpiece 2, a fixed first press beam 13 or lower, in particular standing on the base plate 8, on front end faces 12 of legs of the side cheeks 9, 10 near the floor Press beam 13 is attached. This preferably fixed and fixed press beam 13 can also be referred to as a press table, on which parts of the bending tool 4 are arranged and also held. On the front end faces 14 of legs removed from the base plate 8, a further press bar 16, which is relatively adjustable relative to the press bar 13 forming the table bar, is mounted in linear guides 15. The press bar 16 can also be referred to as a second press bar or upper press bar 16 but also as a pressure bar.
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    Tool receptacles 19, 20 for fitting with the bending tool or tools 4 can be arranged on mutually opposite, parallel to each other longitudinal end faces 17, 18 of the two press beams 13, 16. The upper longitudinal end face 17 of the lower press beam 13 here serves to support the bending die 6 of the bending tool 4. The longitudinal end face 18 of the upper press beam 16 here forms the lower longitudinal end face thereof. The bending tool or tools 4 can also be held on the tool receptacles 19, 20 with the interposition of an adapter (not shown in more detail), although this is rather considered to be not favorable for an exchange process of individual components or of the entire bending tool 4, but may also be a possibility.
    The bending press 3 shown has a drive arrangement 21 for the adjustable press beam 16, namely the pressure beam, e.g. two drive means 22 operated with electrical energy, which can be connected to the line with a control device 24 fed from an energy network 23. The operation of the bending press 3, in particular also the changing process of the bending tool 4, can be controlled via an input terminal 25 which is connected to the control device 24.
    The drive means 22 can e.g. are electromotive spindle drives 26, as are generally known, of which actuating means 27 for a reversible actuating movement of the upper press beam 16 formed by the pressure beam are, for example, drive-connected to the latter. Irrespective of this, it would also be possible to form the drive means 22 by hydraulically and / or pneumatically actuated actuating means. Cylinder-piston arrangements can be used. But there would also be other drive means, such as Eccentric drives, toggle lever drives, rack and pinion drives, etc. are conceivable.
    Furthermore, the production system 1 can also comprise a manipulator, not shown here, which removes at least a part of it from a stack of sheets to be deformed or bent and transfers it to the work area or the operating side of the bending press 3. The manipulator
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    N2017 / 34000-AT-00 can also be used to change or change the tool position.
    In this exemplary embodiment, the production system 1 also includes a safety system 28 in order to protect the machine operator from being pinched or crushed between the workpiece 2 and the bending tool 4 and / or another machine part, in particular the upper press beam 16. The safety system 28 can also be referred to as a safety system and serves to preserve or prevent injuries to the operator, damage to the bending press 3 and the workpiece 2 to be produced. The safety system 28 can be used in combination with the bending press 3 and the bending tool 4 thereon for a safety Surveillance procedures serve or are used.
    It is indicated schematically in FIG. 1 that at least that area or section on a front or front side 43 and / or on a rear side 44 of the upper press beam 16 is provided for monitoring by a separate first safety device 29 or monitoring device. The front side 43 or the front side of the upper press beam 16 is preferably monitored in order to prevent or prevent a body part of the machine operator from being pinched or squeezed between the partial section of the workpiece 2 and the upper press beam 16 when a section of the workpiece 2 is pivoted up. The upper press beam 16 has a first end region 47 and a second end region 48 spaced or spaced from one another in the direction of its longitudinal extent (in the “Z” direction). In the vertical direction and thus in the “Y” direction, the upper press beam 16 has an upper longitudinal end face 49 and the lower longitudinal end face 18 already described above, which faces the lower press beam 13.
    For this purpose, which may be independent, the first security device 29 is provided, which covers a first monitoring area 30 and detects the penetration of objects or parts of the body. Such systems or devices are mostly built on an optoelectronic basis and can
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    N2017 / 34000-AT-00 are called light barriers. The first security device 29 can thus comprise a first transmission device 31 and a first detection device 32 cooperating therewith.
    As can now be seen better from the illustration in FIG. 2 in conjunction with FIG. 1, in addition to the first safety device 29, at least one second safety device 33 can be provided directly adjacent to it. The at least one second security device 33 is arranged between the first security device 29 and the upper press beam 16 and covers a second monitoring area 34. The first monitoring area 30 is viewed in the “X” direction and thus in the normal direction on the press beam 16, arranged further away from the upper press beam 16 than the second monitoring area 34. Thus, the first monitoring area 30 is at a greater distance from the front or front 43 of the upper press beam 16 than the second monitoring area 34 closer to it. The distance or distance of the second monitoring area 34 from the front side 43 is to be selected such that the operation of the bending press 3 can be switched off so quickly in order to pinch a body part, in particular of a finger between a folded-up part of the workpiece 2 to be manufactured and the front side 43 or the front surface of the upper press beam 16. The front side 43 usually forms a predominantly flat front surface. The safety devices 29 and 33 and a third safety device 37, which will be described below, can also be referred to as safety devices.
    However, further safety devices, not shown in more detail, could also be provided in addition to the second safety device 33, in order to enable even more staggered monitoring up to the complete shutdown of the drive arrangement 21 by the control device 24.
    The two monitoring areas 30, 34 are preferably arranged in monitoring planes 45, 46 each running parallel to one another and in a parallel alignment with respect to a front flat side or front side 43 of the upper one
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    Press bar 16. Thus, the two monitoring areas 30, 34 can have a planar shape, possibly with a small layer thickness. The monitoring levels 45, 46 or the monitoring areas 30, 34 are preferably arranged to run in vertical levels. Depending on the width or thickness of the light beams and / or the light beam, the two monitoring areas 30, 34 can form or have a layer thickness or layer thickness in the “X” direction. The longitudinal course of the light beams, not designated in more detail, for each monitoring area 30, 34 can be selected to run parallel to one another and / or also obliquely between the transmitting and detection devices that belong together.
    A second transmission device 35 and a second detection device 36 are provided to form the second monitoring area 34 of the second security device 33.
    It would also be possible, however, not to arrange the first transmission device 31 and the second transmission device 35 and the first detection device 32 and the second detection device 36 laterally with respect to the longitudinal extent of the upper press beam 16, but rather above and / or below it. With an arrangement of the transmission devices 31, 35 and the detection devices 32, 36 which is spaced apart from one another, an arrangement one above the other in the vertical direction can be achieved, as is simplified in FIG.
    Irrespective of this, it would also be possible to have the first and second transmitter devices 31 and 35 and the first and second detection devices 32 and 36 together either on one of the upper side, namely the upper longitudinal end face 49, the upper press beam 16 or the underside, namely the lower one Longitudinal end face 18 of the upper press beam 16 located longitudinal edge area.
    However, it would also be possible for e.g. the here in the “X” direction further from the upper press beam 16 spaced first transmitter 31 and
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    N2017 / 34000-AT-00, the first detection device 32 for forming the first monitoring area 30 is arranged on at least one end area 47, 48 located laterally with respect to the longitudinal extent of the upper press beam 16. In this way, a direction of transmission of the light beams running approximately in the “Z” direction — that is, in the direction of the longitudinal extent of the upper press beam 16 or the bending edge — can be achieved. For this purpose, the second transmission device 35 and the second detection device 36 can be arranged offset by 90 °, as is shown and described in the exemplary embodiment in FIG. 3.
    A further possible arrangement is shown in FIG. 1, the second transmitter device 35 and the second detection device 36 being indicated together in dash-dotted lines only on the upper longitudinal end face 49 of the upper press beam 16 that is turned away from the punch 5. However, it is also possible for the second transmitting device 35 and the second detection device 36 to be arranged at a distance from one another in the direction of the height of the upper pressing bar 16 — in the “Y” direction. The second monitoring area 34 can thus be arranged closer to a front side 43 of the upper press beam 16. Due to this arrangement of the first transmission device 31 and the second transmission device 35 that is crosswise to one another or offset by 90 ° to one another, a transmitting direction of the data signals, in particular the light beams, can be achieved in the monitoring areas 30 and 34. This enables even better and more complete surveillance to be achieved, which can further increase security.
    Furthermore, the immediate bending area of the workpiece 2 between the bending tool 4 with its punch 5 and bending die 6 can also be monitored, as is shown in simplified form in FIG. 1.
    For this purpose, the safety system 28 can comprise a third safety device 37, which monitors the immediate bending area between the bending die (s) 5 and the bending die (s) 6 of the bending tool 4. A third monitoring area 38 is thus defined in the area of the longitudinal extent of the bending edge defined by the punch 5, which is shown in FIG. 1 as area
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    N2017 / 34000-AT-00 chenelement has been shown. The third safety device 37 is used in particular to control and monitor the bending process and / or whether an object, in particular a body part of an operator, is located in the working area of the bending tool or tools 4. The third safety device 37 can thus be used to monitor whether e.g. the hand of the machine operator or the machine operator is located in the danger zone between the bending die 5 and the bending die 6 interacting therewith. If this is the case, the third safety device 37 of the safety system 28 stops the bending tool 4 from moving towards one another, in particular the downward movement of the upper press beam 16 in the direction of the lower press beam 13. This can prevent a part of the body from being pinched and an associated injury in this third monitoring area 38.
    Such systems are mostly based on an optoelectronic basis. In this case, optical data signals, such as light beams, in particular laser beams, are emitted by the transmission device or devices 31, 35 and are detected by the detection device or devices 32, 36 interacting therewith. The first and second detection devices 32, 36 are designed here as optical detection means and can also be referred to as receiving devices, which each receive or receive the at least one beam emitted or emitted by the first and second transmitting devices 31, 35 as an optical data signal, in particular as a light source catches and subsequently evaluates if necessary.
    The third security device 37 is represented in a simplified manner by a third transmission device 39 located on the right-hand side with respect to the machine frame 7 and a third detection device 40 located on the left-hand side. Thus, the at least one third transmission device 39 and the at least one third detection device 40 cooperating therewith are arranged spaced apart from one another in the longitudinal extension of the tool holders 19, 20 or the press bars 13, 16. The third detection device 40 is designed here as an optical detection means and can also be referred to as a reception device, which
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    N2017 / 34000-AT-00 receives or collects the at least one light beam emitted or emitted by the third transmitter device 39 as a light source and subsequently evaluates it, if necessary. A fastening unit 41, each with a fastening device 42, can be provided for fastening the third transmission device 39 and the third detection device 40 to the upper press beam 16. The structure of both fastening devices 42 can in principle be chosen to be identical to one another.
    Thus, with a relative adjustment movement of the upper press beam 16, at least both the third transmission device 39 and the third detection device 40 are constantly moved as well. A plurality of light beams, in particular laser beams, are usually emitted by the third transmission device 39 and are recorded and detected by the third detection device 40. This principle is generally to be regarded as known, which is why it will not be discussed in more detail here. If at least one of the light beams is interrupted, the adjustment movement of the bending press 3 is stopped. The position of the emitted light beams is to be set as a function of the working length of the bending tool 4, in particular the bending punch 5 provided for the bending process.
    A relative movement between the upper press bar 16 and the third transmission device 39 and the third detection device 40 is basically only provided for adjustment and / or adjustment activities. Such adjustment and / or adjustment activities are e.g. required if there is a change in the working length of the punch 5 due to a tool change. The position of the light beam or beams is usually selected at a predefined distance below the working edge or bending edge of the respective bending die 5 provided for the bending process.
    The arrangement and mounting of the third security device 37 of the security system 28, in particular the third transmission device 39 and the third detection device 40, on the upper press beam 16 is carried out by means of the fastening unit 41, each with a fastening device 42 located in the end region 47, 48 or in the end region thereof. which only here
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    N2017 / 34000-AT-00 are indicated schematically. The two end regions 47, 48 or longitudinal ends of the upper press beam 16 are arranged at a distance from one another in the direction of its longitudinal extent.
    However, it would also be possible to arrange the second transmission device 39 and the second detection device 40 together on only one side of the upper press beam 16 and to provide a reflector on the opposite side in the “Z” direction. The light beam emitted by the second transmission device 39 can thus be reflected and reflected to the second
    The safety devices 29, 33 and 37 described above can be communicatively connected to the control device 24. This communication link can be line-based, wireless communication, or the like.
    The provision of the first and second monitoring areas 30, 34, which can also be referred to as detection fields, and their mutually different spacing or spacing from the front side 43 of the upper press beam 16, means that after detection of an entry of an object and / or part of the body into a of the respective monitoring areas 30, 34, different measures are triggered and / or effected by the control device 24.
    If the first security device 29, which is arranged at a greater distance in front of the front side 43, has an entry of an object, such as e.g. a sheet metal part, a bending aid and / or a body part is detected, a first signal is generated and this is forwarded to the control device 24. In a first step, the control device 24 can thus reduce the adjustment speed of the upper press beam 16 in the direction of the lower press beam 13 or press table with respect to an adjustment speed stored or preset in the control device 24 or a customary adjustment speed specified by the control device 24. So when swiveling up one
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    Partial section or leg of the workpiece 2 to be produced, the angular speed at which this partial section moves in the direction of the front side 43 of the upper press beam 16 is reduced.
    As can be seen from FIG. 2, the second safety device 33, with the second monitoring area 34 defined or formed by it, is also arranged to run in front of the front side 43 of the upper press beam 16.
    If an entry of an object and / or body part into the second monitoring area 34 is also subsequently detected by the second security device 33, a second signal is generated and this event is made known to the control device 24 as a second signal. An emergency stop command is generated by the control device 24 and the drive arrangement 21 is at least immediately stopped. A further downward movement of the upper press beam 16 in the direction of the lower press beam 13 is thus stopped immediately and the further bending process is stopped. In addition and / or simultaneously with the generation and forwarding of the emergency stop command to the drive arrangement 21, the control device 24 can also forward a reset command for lifting the upper press beam 16 to the adjustment direction facing away from the lower press beam 13 to the drive arrangement 21.
    The activation of at least the first safety device 29 and / or the second safety device 33 is carried out by the control device 24. The activation of at least one of the safety devices 29, 33 should only take place at the beginning of the downward movement and be active at least during the downward movement of the upper press beam 16. The downward movement and the associated start of the bending process is usually started with a start command or input command (down button) on the input terminal 25. The entry is usually made manually by a machine operator, although two-hand safety operation or two-hand entry may also be required. This ensures that the safety device 29 and / or 33 is only active when a bending process is carried out.
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    By providing the monitoring of at least the front area of the upper press beam 16, the most varied of advantages can be achieved. Protection against injury to persons, damage to the upper press beam 16 or pressure beam, deformation of the workpiece 2, protection from external peripheral units, protection against destruction of the bending aid and / or performance gain can be achieved by monitoring the shear and pinch points.
    The method for monitoring the danger zone of the production system 1 for free bending or stamping bending of the workpiece 2 to be manufactured from the sheet by means of the bending press 3 in front of its upper press beam 16 comprises at least the following steps:
    Providing the bending press 3, in particular a press brake, with the machine frame 7, the lower press beam 13, the upper press beam 16 and the tool receptacles 19, 20 arranged or formed on the press beams 13, 16, the upper press beam 16 the front side 43, the rear side 44, the first end region 47, the second end region 48 and the upper longitudinal end face 49 and the lower longitudinal end face 18,
    Providing at least one bending tool 4 with at least one bending punch 5 and at least one bending die 6,
    Providing the security system 28 with at least one security device 29, 33, 37 comprising at least one transmission device 31, 35, 39 and at least one detection device 32, 36, 40, with a monitoring area 30, 34, 38 of the at least one security device 29, 33, 37 is defined
    Providing the control device 24 and the input terminal 25, the security system 28 and the input terminal 25 being communicatively connected to the control device 24, and the first security device 31 of the security system (28) thereby defining a first monitoring area 30, and the first monitoring area 30 in this way the front side 43 of the upper press beam 16
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    N2017 / 34000-AT-00 states that when an object enters the first monitoring area 30, a first signal is generated by the first security device 31 and forwarded to the control device 24.
    Further method steps have already been described in the description of the production system 1 in connection with the security system 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 of the same, but rather also various combinations of the individual design variants with one another are possible and this variation possibility is based on the teaching of technical action through the present invention Ability of the specialist working in this technical field.
    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.
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    LIST OF REFERENCE NUMBERS
    1 manufacturing plant 31 first transmission device 2 workpiece 32 first detection device 3 bending press 33 second safety device 4 bending tool 34 second surveillance area 5 punch 35 second transmitter 6 bending die 36 second detection device 7 machine frame 37 third security device 8th baseplate 38 third surveillance area 9 side cheek 39 third transmitter 10 side cheek 40 third detection device 11 cross-dressing 41 fixing unit 12 Front face 42 fastening device 13 pressing bars 43 front 14 Front face 44 back 15 linear guide 45 first monitoring level 16 pressing bars 46 second monitoring level 17 upper longitudinal face 47 first end area 18 lower longitudinal face 48 second frontal area 19 tool holder 49 upper longitudinal face 20 tool holder 21 drive arrangement 22 drive means 23 energy grid 24 control device 25 input terminal 26 spindle drive 27 actuating means 28 security system 29 first safety device 30 first surveillance area
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    权利要求:
    Claims (16)
    [1]
    claims
    1. A method for monitoring a danger zone of a production plant (1) for bending or embossing a workpiece (2) to be made from a sheet metal by means of a bending press (3) in front of its upper press beam (16), comprising the following steps:
    Providing the bending press (3), in particular a press brake, with a machine frame (7), a lower press beam (13), an upper press beam (16) and tool holders (19, 20) arranged or designed on the press beams (13, 16), wherein the upper press beam (16) has a front side (43), a rear side (44), a first end area (47), a second end area (48) and an upper longitudinal end face (49) and a lower longitudinal end face (18),
    Providing at least one bending tool (4) with at least one bending punch (5) and at least one bending die (6),
    Providing a security system (28) with at least one security device (29, 33, 37) comprising at least one transmission device (31, 35, 39) and at least one detection device (32, 36, 40), whereby at least one security device (29, 33 , 37) a monitoring area (30, 34, 38) is defined,
    Providing a control device (24) and an input terminal (25), the security system (28) and the input terminal (25) being communicatively connected to the control device (24), characterized in that a first security device (31) of the security system (28) a first monitoring area (30) is defined, and the first monitoring area (30) is arranged in front of the front (43) of the upper press beam (16) such that when an object enters the first monitoring area (30) a first signal from the first safety device (31) is generated and forwarded to the control device (24).
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    [2]
    2. The method according to claim 1, characterized in that from the control device (24) on receipt of the first signal, the adjustment speed of the upper press bar (16) towards the lower press bar (13) with respect to a preset or from the control device (24) predetermined adjustment speed is reduced.
    [3]
    3. The method according to claim 1 or 2, characterized in that a second security device (33) is provided, wherein the second security device (33) defines a second monitoring area (34), and the second monitoring area (34) also in front of the front (43) of the upper press beam (16) is arranged to run and that when an object enters the second monitoring area (34) a second signal is generated by the second security device (33) and passed on to the control device (24).
    [4]
    4. The method according to claim 3, characterized in that an emergency stop command is generated by the control device (24) upon receipt of the second signal and the adjustment movement of the upper press bar (16) towards the lower press bar (13) stopped becomes.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that the at least one first safety device (29) is only activated when a start command for the start of the bending process is entered by the control device (24) and / or that the at least one second The safety device (33) is only activated when the control device (24) enters a start command for the start of the bending process.
    [6]
    6. Production system (1) for free bending or stamping bending of a workpiece to be manufactured from a sheet (2) by means of a bending press (3), in particular for carrying out the method according to one of the preceding claims, comprising
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    N2017 / 34000-AT-00 the bending press (3), in particular a press brake, with a machine frame (7), a lower press beam (13), an upper press beam (16) and tool holders arranged or formed on the press beams (13, 16) (19, 20), the upper press bar (16) having a front side (43), a rear side (44), a first end region (47), a second end region (48) and an upper longitudinal end side (49) and a lower longitudinal end side ( 18), at least one bending tool (4) with at least one bending punch (5) and at least one bending die (6), a security system (28) with at least one security device (29, 33, 37) comprising at least one transmitting device (31, 35, 39) and at least one detection device (32, 36, 40), a monitoring area (30, 34, 38) being defined by the at least one security device (29, 33, 37), a control device (24) and an input terminal (25) , being the security system (28) and the input terminal (25) are communicatively connected to the control device (24), characterized in that a first monitoring area (30) defined by at least one first security device (31) of the security system (28) in front of the front (43) of the upper one Press bar (16) is arranged to run.
    [7]
    7. Production system (1) according to claim 6, characterized in that a second security device (33) is provided with at least a second monitoring area (34), which at least a second monitoring area (34) also in front of the front (43) of the upper press beam ( 16) is arranged running.
    [8]
    8. Production system (1) according to claim 6 or 7, characterized in that the first monitoring area (30) is arranged at a greater distance in front of the front (43) of the upper press beam (16) than the second monitoring area (34).
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    N2017 / 34000 AT-00
    [9]
    9. Production system (1) according to one of claims 6 to 8, characterized in that the first monitoring area (30) is arranged in a first monitoring level (45) and the second monitoring area (34) in a second monitoring level (46), and the two monitoring levels (45, 46) are arranged at a distance from one another.
    [10]
    10. Production system (1) according to claim 9, characterized in that the first monitoring level (45) and the second monitoring level (46) of the two monitoring areas (30, 34) are arranged running parallel to one another.
    [11]
    11. Production system (1) according to one of claims 6 to 10, characterized in that the first transmission device (31) and the second transmission device (35) on the upper press beam (16) in its first end region (47) and the first detection device (32 ) and the second detection device (36) are arranged on the upper press beam (16) in the second end region (48) opposite the first end region (47).
    [12]
    12. Production system (1) according to one of claims 6 to 10, characterized in that the first transmission device (31) and the second transmission device (35) on the upper press beam (16) in the region of one of its longitudinal end faces (18, 49) and the first Detection device (32) and the second detection device (36) are arranged on the upper press beam (16) in the region of the longitudinal end face (49, 18) opposite this.
    [13]
    13. Production system (1) according to one of claims 6 to 10, characterized in that the first transmission device (31) and the first detection device (32) in the direction of the longitudinal extent of the upper press beam (16) spaced apart from each other at one of the end regions (47 , 48) of the upper press beam (16) are arranged thereon and that at least the second transmission device (35) is arranged on the upper press beam (16) in the region of one of the longitudinal end faces (18, 49).
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    [14]
    14. Production system (1) according to claim 13, characterized in that the second detection device (36) is arranged in the region of the same longitudinal end face (18, 49) on the upper press beam (16) as the second transmission device (35) or that the second detection device ( 36) is arranged on the upper press bar (16) in the region of the longitudinal end face (49, 18) opposite the second transmitter device (35).
    [15]
    15. Production system (1) according to one of claims 6 to 14, characterized in that a third security device (37) is provided with at least one third transmission device (39) and at least one third detection device (40) and one of the third security device (37 ) defined third monitoring area (38) for monitoring an immediate bending area between the bending die (5) and the bending die (6) of the bending tool (4).
    [16]
    16. Production system (1) according to claim 15, characterized in that the third safety device (37) on the upper press beam (16), in particular in the region of its opposite end regions (47, 48), is arranged.
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    同族专利:
    公开号 | 公开日
    EP3536416B1|2020-12-23|
    AT520726B1|2019-07-15|
    EP3536416A1|2019-09-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE10309399A1|2003-03-04|2004-09-16|Sick Ag|Security method and optoelectronic sensor|
    DE102004058472A1|2004-11-24|2006-06-08|Pilz Gmbh & Co. Kg|Safety device and method for determining a caster path in a machine|
    EP2431650A1|2010-09-20|2012-03-21|Bystronic Laser AG|Safety system for operational safety for machines, in particular folding presses|
    DE102014105120A1|2014-04-10|2015-10-15|Sick Ag|LIGHT GRID ASSEMBLY FOR FUSING A TOOL MACHINE|
    WO2018018058A1|2016-07-26|2018-02-01|Trumpf Maschinen Austria Gmbh & Co. Kg.|Workpiece processing machine and method for operating the workpiece processing machine|
    JPS6340265Y2|1981-10-06|1988-10-21|
    JPS614420Y2|1982-12-24|1986-02-10|DE102020116021A1|2020-06-17|2021-12-23|Pilz Gmbh & Co. Kg|Safety device and method for protecting a machine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50187/2018A|AT520726B1|2018-03-07|2018-03-07|Method for monitoring a production plant and manufacturing plant with a security system|ATA50187/2018A| AT520726B1|2018-03-07|2018-03-07|Method for monitoring a production plant and manufacturing plant with a security system|
    EP19161011.2A| EP3536416B1|2018-03-07|2019-03-06|Method for monitoring a production assembly and manufacturing system with a safety system|
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