奥地利专利AT511591A4 BENDING TOOL WITH SAFETY DEVICE

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专利摘要:
The invention relates to a bending tool (1) for insertion into a tool receptacle (13), comprising a tool body (3), an adjustable locking element (6) for securing the bending tool (1) in the tool receptacle (13), two opposing side surfaces (13). 9,10) on the tool body (3) accessible actuating surfaces (8,11) which are arranged on at least one actuating element (7), between a with the locking position (15) of the locking element (6) corresponding to the basic position (25) and one with the unlocking position (20) of the locking element (6) corresponding actuating position (27) is adjustable, and wherein an adjustment of the actuating element (7) by means of a coupling means (21) in a movement of the locking element (6) is transmitted. In this case, the coupling means (21) from the actuating element (7) to the locking element (6) and contacts a transfer surface (30) on the actuating element (7) and a contact surface (32) on the locking element (6) and is further the coupling means (21) between Actuating element (7) and locking element (6) guided displaceably in the tool body (3) in the spacing direction between the actuating element (7) and locking element (6).
公开号:AT511591A4
申请号:T1632012
申请日:2012-02-07
公开日:2013-01-15
发明作者:
申请人:Trumpf Maschinen Austria Gmbh；
IPC主号:

专利说明:

14:12:47 07-02-2012 5/42 25 »· · ·
" -1 -
The invention relates to a bending tool according to the preamble of claim 1.
Performing different bending tasks on a bending machine in many cases requires a change between different bending tools, for which a release of the tool clamping in the tool holder is required. In the case of heavy bending tools, the tool change is usually carried out by threading or threading in on the ends of a press beam or press table. With tools of low to medium weight, a tool change is often performed by removing and inserting down or up, which is faster and easier to perform. However, so that a bending tool when loosening the clamping can not fall unexpectedly and uncontrollably from the tool holder, Si-cherheitsvorrichtungen are often provided in such bending tools, in which a positively engaging in a recess in the tool holder locking element must be unlocked.
Such a bending tool is e.g. from document EP 0 494 714 A1. Therein, an arrangement for actuating the Riegeielements is shown in Figure 8, in which two accessible from opposite side surfaces actuating elements are coupled via a rotary body and one of the actuating elements is coupled via a Schwenkhebeleiement with the locking element. By arranged on opposite side surfaces actuating elements can be done in such a bending tool unlocking regardless of the orientation of the bending tool in the tool holder comfortably from the operator side in front of a bending press. The central axes of N2011 / 25700 η Λ ΛΓ t Λ Λ Λ -2- 25 J4: 13: 24 07-02-2012 6/42
Actuators are relatively widely spaced from each other, since in between the rotary body is still arranged. Such an embodiment of a safety device with a rotary body and a pivot lever element can not be used because of the large space requirement in bending tools with low bending edge length, although just as fast and comfortable changing process is sought in these bending tools with low weight.
The object of the invention is to provide a bending tool with a safety device, which can be executed even with small bending edge lengths and in the application a reliable unlocking safest ^.
The object of the invention is achieved by a generic bending tool with the characterizing features of claim 1.
The fact that the coupling means extends from the actuating element to the locking element and contacts a transfer surface on the actuating element and a contact surface on the locking element and at the same time the Kopplungsmittei between the actuating element and locking element is mounted displaceably in the tool body substantially in the direction of the distance between the actuating element and locking element, the number minimizes components required for the motion coupling between actuator and locking element to only one coupling means and thereby also the required installation space for the non-positive connection between the actuating element and locking element can be minimized, especially since the coupling means essentially performs only a linear movement.
An advantageous embodiment of the bending tool may consist in that the actuating surfaces are formed by two actuating elements mounted in the tool body and acting on the coupler. A displacement of the one actuating surface in this case does not necessarily cause a corresponding movement of the second actuating surface on the opposite side surface, as is the case with a single, rigidly connected bed. N2011 / 25700 25 25 7/42 ....... 14:14 : 06 07-02-2012 • · «* ·« · # «* · 4 • ·« »« »* * * * # 4 * 1 · * * *« · -3- element would be the case. The actuators can be structurally simpler and easier to produce in this case. Furthermore, the installation or removal of the actuating elements can also be simpler.
A reliable transmission of movement between the actuating movement and the locking element is provided if the coupling means is formed by a coupling element contacting the transfer surface with a first control surface and contacting the contact surface with a second control surface. The coupling element as a largely rigid body, which contacts both actuator and locking element transmits the movements substantially free of play. Possibly contained within the coupling element slight elastic properties are to be kept so small that the forces required for the unlocking movement of the locking element can still be reliably transferred to this. The coupling element can be mounted displaceably in a corresponding recess or a separate bearing bush in the tool body.
A possible development may consist in that the actuating element from the basic position in two oppositely oriented to this actuation positions is adjustable and it aulweist has two accessible from opposite side surfaces on the tool body actuating surfaces. Further, if the transfer surface comprises two differently oriented transfer faces cooperating with two differently oriented control sub-faces on the coupling element, an unlocking of the locking element from both side faces with a similar actuation movement, e.g. by applying a compressive force, possible.
An inventive bending tool, regardless of its installation position from the front of the machine, e.g. can be unlocked by a programmable handling device for workpieces or even from the back of the machine by means of a programmable backgauge and changed in a row or usually standing on the front of the machine operator, the bending tool, regardless of the mounting position of the front N2011 / 25700 25 14:14: 49 07-02-2012 β / 42 -4-side. The differently oriented Übertragungsfiächen cause different directions of movement of the actuating element are possible and either the same adjustment movement of the coupling element is effected in both directions of actuation or depending on the actuation direction, a different adjustment movement of the coupling element is effected.
The same advantageous effect can be achieved that in the tool body, as already described above, two actuators are mounted adjustable with opposite sides of the tool body accessible actuating surfaces having mutually differently oriented transmission surfaces, which interact with two mutually differently oriented control sub-surfaces on the coupling element , The two transmission paths correspond in their effect to the two transmission sub-areas of the embodiment described above.
If the coupling element from its corresponding to the locking position of the locking element basic position in two oppositely oriented to this actuating positions, is adjustable and the second control surface two mutually differently oriented control sub-areas includes, with two mutually differently oriented contact surfaces on the locking element interaction, can alternately adjustment nevertheless be converted into a movement of the locking element, which leads from the locking position to the unlocked position. For the practical applicability of the bending tool, a simple production and for favorable ratios and force relationships between the moving elements, it is advantageous if the adjustment of the coupling element is approximately perpendicular to the adjustment of the actuating element and the adjustment of the locking element.
For the same reasons, it is also advantageous if the adjustment directions of the actuating element, coupling element and locking element lie in a common plane. N2011 / 25700 Λ Λ Π I Λ Λ r * 25, 14: 15: 30 07-02-2012 9/42 «I» · · * * * * * # # # # # # # # # # # # # # # # # · «· · I · · · ·» 1 1 f * »· * * * * * *
-5-
The bending tool may further be designed so that the transfer surface and / or at least one control surface, and / or the contact surface are at least partially formed as flat surfaces with a constant pitch or with a constant inclination angle relative to the respective adjustment direction, whereby the adjustable elements easy to finished are.
However, it may also be advantageous if the transfer surface and / or at least one control surface, and / or the contact surface is at least partially formed as convexly curved surfaces with variable pitch relative to the respective adjustment direction, whereby, for example, despite increasing counterforce of the return spring is a substantially constant Actuating force is effected. For this purpose, the transmission ratio decreases starting from the basic position during movement in the actuating position. Favorable translation and force relationships between the adjustable elements of the safety device are given when the control surfaces, on the coupling element in its effective portion at an inclination angle between 35 "and 60 ° inclined to the adjustment direction of the coupling element.
The counterforce or bias of the return spring can be relatively small when the cooperating with the contact surface on the locking element control surface of the coupling element extends at an inclination angle between 50 ° and 60 ", in particular by 55 ° with respect to its adjustment, whereby the return movement of the locking element in the locked position is opposed by the coupling element lower resistance.
If two transmission sub-surfaces on the actuating element or the transfer surfaces on two actuators and the control disc surfaces on the coupling element and / or arranged with contact surfaces on the locking element control part surfaces are arranged symmetrically to the respective basic position of the considered upstream element results regardless of the adjustment of the upstream element from the basic position always the same adjustment direction of the downstream element. N2011 / 25700 25 14:16:13 07-02-2012 10/42 -6-
The contacting between the actuating element and the coupling element and / or between the coupling element and the locking element may further comprise a slotted guide, which is oriented differently to the adjustment directions of the respectively associated elements. The respective other element is coupled for example with a guide pin in the slotted guide.
In order to reduce the required actuating forces and wear due to reduced friction between the surfaces interacting during the movement transmission, it is advantageous for the transmission surface and / or the control surfaces and / or the contact surface to be provided with a friction-inhibiting layer.
The same advantageous effects can also be achieved in that the transfer surface and / or at least one of the control surfaces and / or the contact surface are formed by a rolling element mounted on the actuating element or on the coupling element or on the locking element.
An alternative possibility to transfer the movement of the actuating element in a space-saving and yet reliable manner to the locking element consists in using as coupling means a substantially irtkompressibles coupling fluid which is enclosed in a running in the tool body of the actuators to Rie-geletement fluid channel, and further the transfer surfaces are formed on the actuating elements and the contact surface on the locking element of sealingly guided piston sections in the tool body. The motion is transferred by displacing fluid volume between the actuating element and the locking element, wherein the fluid channel forms the guide for the coupling means displaceable therein in the form of the fluid, which contacts both the transmission surface on the two actuating elements and the contact surface on the locking element. The fluid channel connects, preferably in a straight line, the actuator directly to the locking element.
In order that any leakage occurring on the locking element or the actuating elements during the use of the bending tool can be compensated, it is possible for the fluid channel to have a valve arrangement, in particular a valve arrangement Check valve is connected to a fluid reservoir.
The fluid reservoir may comprise a pressurized piston acted upon by a spring element which feeds a quantity of coupling fluid corresponding to the leakage losses via the valve arrangement.
Thus, the backup of the bending tool in the tool holder is reliable in all states, it is advantageous if in particular the locking element is connected directly or indirectly with a force acting in the direction of the locking position return spring. Furthermore, a return spring acting directly or indirectly on the actuating element and / or the coupling element is advantageous, so that these too are automatically moved in the direction of the basic position in the absence of an actuating force on the actuating element.
A simple production of the bending tool is given if the actuating element and / or coupling means and / or locking element are guided in circular cylindrical bores in the tool body and essentially have a kretszy-lindrischen basic body. In this case, the adjustable elements can be milled out of round material and accurately guided in the holes.
A change of a bending tool can be done with a Greifmittei a handling device, if at least one actuating surface is accessible in a gripping recess on the tool body. By coupling the handling device thereby simultaneously the locking element is deactivated and no additional actuators for unlocking required.
For a better understanding of the invention, this will be explained in more detail with reference to the following figures.
Each shows in a highly schematically simplified representation:
Fig. 1 is an overall view of a possible embodiment of a bending tool according to the invention; N2011 / 20700 25 14:17:35 07-02-2012 12/42 -8-
2 shows a partial section through an embodiment of a bending tool in the locked position; 3 shows a partial section through a further embodiment of a bending tool in the locking position. 4 shows a partial section through a further embodiment of a bending tool in the locked position; 5 shows a partial section through an embodiment of a bending tool with hydraulic movement transmission in the locking position. 6 shows a partial section through a bending tool according to FIG. 5 in the unlocked position; FIG. 7 shows a partial section through a further embodiment of a bending tool with hydraulic movement transmission in the locking position; 8 shows a contact point between a control surface on an actuating element and a coupling element with a friction-inhibiting layer; 9 shows a contact point between a control surface on an actuating element and a coupling element with a friction-inhibiting rolling element.
In the introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component designations, wherein the disclosures contained in the entire description can be applied mutatis mutandis to the same parts with the same reference numerals and component designations. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to the new situation mutatis mutandis when a change in position. Furthermore, individual features or combinations of features from the illustrated and described different embodiments may be considered as stand-alone to present inventive or inventive solutions. All statements on ranges of values in the description of the present invention should be understood to include any and all sub-ranges thereof, e.g. the indication 1 to 10 should be understood to include all sub-ranges, starting from the lower limit 1 and the upper limit 10, i. all subregions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10.
Fig. 1 shows a view of a bending tool 1 for use on a bending machine, not shown, for which purpose this can be used in a mostly groove-shaped tool holder of a bending machine.
The bending tool 1 is formed in dargesteltten embodiment by a bending punch 2 with a short bending edge length, as it is often used on press brakes. However, the invention also extends to other embodiments of a bending tool, such as bending dies, bending dies, etc. The bending tool 1 comprises a tool body 3 of which a base portion 4 is provided for insertion into a tool holder. The fixation of the bending tool 1 in the tool holder can be done by different fixing means, for example, based on non-positive or positive action. In the illustrated embodiment, a clamping groove 5 is formed on Basisab-section 4, in which a clamping jaws of the tool holder can engage in a form-fitting manner. The bending tool 1 comprises for securing against falling out of the tool holder in the tool body 3 adjustably arranged locking element 6 which protrudes outwardly in a locking position relative to the tool body 3, with the outside projecting portion can engage positively in a recess in the tool holder and thereby form-locking causes the bending tool 1 in the tool holder. A bending tool 1 can thereby be kept in the inserted position even when the above-mentioned fixing means of the tool holder are deactivated, without the risk of it being damaged Dead weight falls from the tool holder.
The locking element 6 can be adjusted by means of an actuating element 7 from the illustrated locking position in which it protrudes outwardly relative to the tool body 3, in an unlocking position located within the tool body 3, wherein the actuating element 7 outside the tool holder on the tool body 3 and thus outside of the base portion 4 is accessible. The actuating element 7 has an actuating surface 8 and is adjustable from a corresponding to the locking position of the locking element 6 basic position in a corresponding to the unlocking position of the locking element 6 actuating position. The actuating surface 8 is accessible in the illustrated embodiment of a side surface S on the tool body 3, on which also the locking element 6 is effective. On a second side surface 10, which gegenüberiiegt the first side surface 9, a further actuating surface 11 is accessible, which is formed either by the actuating element 7 or, as shown in Fig. 1, of its own further actuator 12.
As with the known from the prior art bending tools and a bending tool according to the invention 1 with a locking element 6 that it does not need to be pushed laterally in the commonly used tool holder, but after releasing the tool clamping and unlocking of the locking element 6 by means of the actuating element 7 or means the further actuator 12 can be removed in the working direction of the bending tool 1 from the tool holder.
The coupling according to the invention between actuating element 7 and locking element 6 or between the actuating elements 7, 12 and the locking element 6 is shown in FIGS. 2 to B in various possible embodiments.
Fig. 2 shows a partial section through a possible embodiment of a bending tool 1, which in a tool recess 13 of an adjustable or N2011 / 25700 l4: t9: Jb U / -02-2U12 li.'42 2 b
11 fixed press bar 14 is used. Fig. 2 shows that the locking element 6 is in a locking position 15, in which a locking extension 16 engages positively locking on the locking element 6 in a recess 17 within the tool holder 13, whereby the bending tool 1 is not removed in the direction of arrow 16 from the tool holder 13 may or may not fall out of it due to its own weight. With the locking element 6 in Verriegeiungsstellung 15, the bending tool 1 can be moved only in the longitudinal direction of the groove-shaped tool holder 13 and, for example, be threaded laterally at the ends of the press bar 14.
Since this is a time-consuming measure, in particular in the case of composite tool sets, the locking element 6, as already described with reference to FIG. 1, can be displaced in dashed lines in the adjustment direction 19, which extends transversely to the arrow direction 18 of the tool holder, into an unlocking position 20 indicated by dashed lines adjust, in which the locking element 6 lies entirely in the tool body 3 and the locking projection 16 with respect to the outer surface, for example, the side surface 9, does not protrude. In the illustrated embodiment, the adjustment direction 19 of the locking element 6 extends at right angles to the vertical inside of the tool holder 13 and the Rie geielement 6 is guided in corresponding guide surfaces in the tool body 3. The adjustability of the locking element 6 and also of the actuating element 7 is preferably provided in the rectilinear direction, but it is also an adjustability in the form of a pivoting movement possible.
The locking element 6 is coupled to the actuating element 7 by means of a coupling means 21 in the form of a coupling element 19 which extends in the tool body 3 from the actuating element 7 to the locking element 6. The coupling element 22 is mounted rectilinearly adjustable in the tool body 3, for which purpose a recess with corresponding guide surfaces is provided in the tool body 3. The adjustment direction 23 of the coupling element 22 extends transversely to the adjustment direction 19 of the locking element 6, in the illustrated embodiment, at right angles thereto. The coupling element 22 serves to mutually transmit adjusting movements of the actuating element 7 and the locking element 6 and can define a defined adjustment position of the actuating element 7. ned adjustment of the locking element 6 are assigned. The locking position 15 of the locking element 6 shown in FIG. 2 accordingly corresponds to a basic position 24 of the coupling element 22 shown in solid lines and a basic position 25 of the actuating element 7 likewise shown in full lines or corresponds to the unlatched position 20 of the locking element 6 indicated by dashed lines with an actuating position 26 of the coupling element 22 and also indicated by dashed lines operating position 27 of the actuating element 7. The Betätigungsseiement 7 is adjustable in the tool body 3 along an adjustment 28, which is transverse to the adjustment 23 of the coupling element 22, and in particular is oriented at right angles thereto.
The unique, mutual association of the positions of actuating element 7 and locking element 6 takes place in that the coupling element 22 with a first control surface 29 contacted a transfer surface 30 on the actuating element 7 and a second control surface 31 of the coupling element 22 contacts a contact surface 32 on the locking element 6. The transfer surface 30 is formed in the illustrated embodiment by an approximately V-shaped recess in the actuating element 7, in which an approximately wedge-shaped end portion of the coupling element 22 engages, which forms the first control surface 29.
As shown in FIG. 2, the locking element 6 is connected to a return spring 33, which presses with a biasing force on the locking element 6 in the direction of the locking position 15. If the latch extension 16 is not blocked by a stationary obstacle, e.g. the tool holder 13 next to the recess 17, is blocked, this restoring force is transmitted via the contact surface 32 and the second control surface 31 on the coupling element 22, and transmitted from this in succession via the first control surface 29 on the transfer surface 30 of the Betätr-transmission element 7. If the locking element 6 or the actuating element 7 is not blocked by a corresponding opposing force, the locking element 6 is displaced into the locking position 15, the coupling element 22 is moved into the basic position 24 and subsequently the Betätigungsseiement 7 in the normal position 25 of FIG. N2011 / 25700 -13-
For unlocking the locking element 6, as shown in Fig. 2, on the actuating surface 8 of the actuating element 7, an actuating force 34 exerted and the displacement of the actuating element 7 from the basic position 25 in the trimmed operating position 27 via the transfer surface 30 and the first control surface 29 in an adjustment movement of the coupling element 22 and subsequently converted via the second control surface 31 and the contact surface 32 in an adjusting movement of the locking element 6, whereby this is spent in the dashed unlocked position 20. The coupling of the elements 7, 22 and 6 is based on the transmission of compressive forces between pressure surfaces in each case two bodies, wherein the pressure surfaces are inclined to the predetermined adjustment of the body, as is the case with the principle of the inclined plane or the principle of a wedge.
The actuating element 7 is accessible not only from the first side surface 9 of the tool body 3, but also accessible from the second opposing side surface 10, and the actuating element 7 also has an actuating surface 8 opposite the second actuating surface 11.
By a relation to the adjustment direction 23 of the coupling element symmetrical shape of the transfer surface 30 and the first control surface 29 resulting in a on the second actuating surface 11 - in Fig. 2 from the left - acting actuating force on the actuator 7 analogous conditions and the locking element 6 also Moved to the Entrleggelungsstellung 20.
The basic position of the actuating element 7, in which the actuating element is centered in the tool body 3, in this embodiment by the lower Endstetlung corresponding to the basic position 24 of the coupling element 22, given in which it is acted upon by the locking element 6, which is supplied with the return spring 33 is pressed.
The actuation force 34 can be exerted by an operator or a robot, for example, and after unlocking the locking element 6, the bending tool 1 can be removed from the tool receptacle 13. In the embodiment shown in FIG. 2, the transfer surface 30, the two Steuerflä- N2011 / 25700 25 14:21:48 07-02-2012 18/42
-14-chen 29 and 31 and the contact surface 32 formed by flat surfaces, but it is also an at least partially convex design of these surfaces possible, as shown by a further embodiment.
In the embodiment according to FIG. 2, the first control surface 29 of the coupling element 22 is oriented at an angle of inclination 35 of approximately 45 ° to the adjustment direction 23 of the coupling element 22. The transfer surface 30 on the actuating element 7 has the same inclination and it is by this inclination angle 35 of about 45 ° horizontal displacement of the actuating element 7 in a vertical displacement of the coupling member 22 translated to the same degree. However, the inclination angle 35 may deviate also in a range between 35 ° and 60 °, this selection of the angle of inclination 35 being a sufficient distance from the friction surfaces acting on the interacting surfaces, thereby preventing the occurrence of self-locking in the transmission of motion between the elements.
The second control surface 31 of the coupling element 22 is inclined in the embodiment of FIG. 2 at an inclination angle 35 of about 55 ° relative to the adjustment direction 23 of the coupling element 22, whereby an upward movement of the coupling element 22 in a magnitude greater horizontal movement of the locking element 6 in the direction of Unlocked position 20 is translated. During the movement of the locking element 6 from the unlocking position 20 into the locking position 15, this larger angle of inclination 35 causes the return movement of the return spring 33 can be accomplished easily.
In a preferred embodiment of the bending tool 1, as shown in the example of FIG. 2, the actuating element 7, the coupling element 22 and the locking element 6 are guided in circular cylindrical bores 36 in the tool body 3 and have substantially a circular cylindrical base body, whereby such a bending tool 1 can be produced with relatively little effort and a low-backlash guidance of the elements can be easily achieved.
FIGS. 4 to 6 show further and, if appropriate, separate embodiments of the bending tool 1, wherein the same parts are denoted by identical N2011J2S700 λ λ n 25.
. * 14:22:32 07-02-2012 • * · 19/42 -15-
Reference numerals or component names as used in the preceding Figs. 1 to 3. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS.
In the embodiment shown in Fig. 2, the actuating element 7 passes through the tool body 3 completely and has a length 37 which is greater than a thickness 38 of the tool body 3 measured in the region of the actuating element 7. In the basic position 25 of the actuating element 7 protrudes this in Fig. 2 on both sides relative to the tool body 3 to the outside, but could also be completely within the tool body 3, as long as the two actuating surfaces 8 and 11 are accessible through openings from the outside and the operation, for example takes place by means of a pin-shaped actuator.
FIGS. 3 to 8 show further and optionally separate embodiments of the bending tool 1, wherein the same reference numerals or component designations are used for the same parts as in the preceding FIGS. 1 and 2. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS. 1 and 2 for components not described in detail below.
3 shows a partial section through a bending tool 1 with a further possible embodiment of a safety device 35, comprising actuating element 7, coupling means 21 in the form of a coupling element 22 and locking element 6, as already described with reference to FIGS.
Also in this embodiment of the actuating element 7, an unlocking of the locking element 6 can be made from both sides of the tool body 3, for which a similar embodiment of the transfer surface 30 is provided in the actuating element 7, which will be described in more detail. In this embodiment, the transfer surface 30 comprises two transfer sub-surfaces 40 and 41 which are oriented differently with respect to one another and cooperate with the first control surface 29 of the coupling element 22 with two control sub-surfaces 42 and 43 oriented differently. That with the actuating N2011 / 25700 25
♦ P · * · »·· ** 1423: 15 07-02-2012 tti * · • · φ · i · · P • ♦ · · · ·« ········································································· End of the coupling element 22 has approximately the shape of a blunt wedge, wherein the two control part surfaces 42 and 43 represent the wedge surfaces. In addition, the control part surfaces 42 and 43 have in Fig. 3 sections of convex faces, so they are spherical, while in the embodiment of FIG. 12, the control part surfaces are designed as flat surfaces.
The transfer surface 30 with the two transfer faces 40, 41 is similar to a V-shaped groove into which the coupling element 22 engages with the wedge-like end. The fact that the coupling element 22 occupies its lowest point in the locking position 15 of the locking element 6, thereby also the actuator 7 is centered in its normal position 25 and can be pressed to the left in the operating position, but alternatively also to the right in a second operating position, if Actuating force is exerted on the second actuating surface 11 from the left side. Since the coupling element 22 is lifted when moving in both operating positions relative to its lower basic position 24, the locking element 6 is adjusted both when actuated on the first actuating surface Θ and when actuated on the second actuating surface 11 in the unlocked position 20. By this embodiment of the bending tool 1 is an unlocking of both side surfaces 9,10 forth possible. For an operator or handling device standing in front of a bending machine, therefore, the actuating element 7 of the bending tool 1 is easily accessible from the front, irrespective of its orientation.
The transfer surfaces 40, 41 run in Fig. 3 in the central region, ie at the beginning of the adjustment of the actuator 7 from the basic position 25 initially steeper and then flat increasingly, whereby the required actuation force, despite increasing counterforce of the return spring 34 does not increase too much.
Also in Fig. 3, an operation shown in Fig. 2 by means of a forceps gripper 44 at the end of a handling device is indicated, with an Endflä- N2011 / 25700 25 t * * · 14:23:57 07-02-2012 21/42 - 17-che 45 can move the actuator 7 from the basic position 25 in the operating position, thereby unlocking the locking element 6.
In addition, the actuating element 7 in a gripping recess 46 on the tool body 3 is accessible. This gripping recess 46 has undercuts, in which spread extensions 47 on the gripper gripper 44 can engage. To remove such a bending tool 1 from the tool holder 13 of the forceps gripper 44 is inserted in the closed state in the Greifausnehmung 46, 22 by means of the actuating element 7 and the Kopp- tion element, the locking element 6 is moved to the unlocked position 20. Subsequently, the forceps gripper 44 is opened so far that the Spreizfortsätze 47 engage in the undercuts of the gripping recess 46, whereby the bending tool 1 is connected to the pliers gripper 44. Subsequently, a not shown, engaging in the clamping groove 5 Werkzeugklemmung be disabled and the bending tool 1 are removed down from the tool holder 13.
To carry out a manual tool change, the tool clamping in the clamping groove 5 is released in a first step, and only then deactivated by an operator, the control element 6 by means of the actuating element 7 and the bending tool 1 manually removed down.
In the embodiments according to FIGS. 2 and 3, the displaceable elements 6, 7, 22 are guided in bores 36 in the tool body 3 and essentially have a circular-cylindrical main body. The bore 36 for the coupling element 22 is attached to the upper end surface 48 of the bending tool 1 and this is closed after introduction of the elements 6, 7, 22 by a plug 49. For introducing the elements, these may have lateral flattening, which allows an insertion into the holes in a twisted position, even if a further element partially protrudes into this. The stopper 49 can, as shown in FIG. 2, additionally have at its lower end a guide pin 50 which can be inserted in a guide groove 51 on the guide rail 51 6 engages, whereby an anti-rotation for the locking element 6 is formed.
In the embodiment shown in Fig. 3, the return spring 30 does not act directly on the locking element 6 in the direction of the locking position 15, but indirectly via a return element 52 which extends with a restoring surface 53 which extends obliquely to the vertical adjustment of the rear part element 52 on the Obereeito Doo Riogololoments 0 on a Odiräyfläd ie 54, Ule obliquely to the adjustment direction 19 of the locking element 6 extends, acts. Does not act on the actuating surfaces 8 and 11, no pressure force, the locking element 6 is spent by the return element 52, as a result, the coupling element 22 and subsequently the actuator 7 in the locking position 15 and the respective basic position 24, 25.
In Fig. 3, an alternative embodiment of a bending tool 1 is shown with dotted lines or dashed lines, in which not a continuous actuator 7 is used to lift the coupling element 22, but this by two separate in the tool body 3 adjustable actuators 55 and 56 with arranged thereon transfer surfaces 57 and 58, which are mutually differently oriented, replaced. In this embodiment, the actuating elements 55 and 56 are pressed by the coupling element 22 in the basic position, which is not self-centering in this case, but is limited by means of stop elements 59. This replacement of a single actuator 7 by two actuators 55, 56 is of course also in the embodiment of the bending tool 1 according to FIG. 2 possible.
The actuator 7 may be composed of two parts for facilitated assembly of the bending tool 1, which are inserted after the introduction of the coupling element 22 and the locking element 6 of the two side surfaces 9,10 in the bore 36 for the actuator 7 and then connected together become. N2011 / 25700 25 ft * «· Γ»
FIG. 4 shows a further possible embodiment of a bending tool 1 in partial section, with two further possibilities of the transmission of motion between the safety device 39 forming here Elements 6, 7, 22 are executed. Also in this embodiment, the actuating element 7, starting from a central base position 24, in two different operating positions 27, which are opposite, are adjusted, and the actuating element 7 two mutually differently oriented transmission surfaces 40 and 41, which in this embodiment at an am Actuating element 7 formed guide pin 60 are arranged, which is engaged in a coupling element 22 formed on the cam guide 61. Since the slotted guide 61 extends obliquely to the adjustment of the actuating element 7, an adjustment of the actuating element 7 with the Führungszaplen 60 causes an adjustment of the coupling element 22 with the sliding guide 61. The inclination angle of the slotted guide 61 is in the dargesteilten embodiment 45 °, but can also be up to 10 "; deviate from it. Depending on whether the actuator 7 is moved to the left in the first operating position or to the right in the second Betätigungssteliung, there is a raising or lowering of the coupling element 22. This is characterized starting from its normal position 24 either in a raised operating position 26 or in a lowered Actuating position 62 adjusted. Thus, the locking element 6 can be adjusted independently of the adjustment of the actuating element 7 and the coupling member 22 from its locking position 15 in its unlocked, the locking element 6 acting on the second control surface 31 comprises two differently oriented control sub-surfaces 63 and 64, which in the Adjusting movement of the coupling element 22 on two mutually differently oriented contact surfaces 65 and 66 act on the locking element 6 and are performed in a simplified form as a guide pin 67 on the locking element 6. The movement transmission between coupling element 22 and locking element 6 shown in FIG. 4 therefore works on the same principle as the movement transmission between actuating element 7 and coupling element 22 in FIG. 2 or FIG. 3. N2011 / 25700 14:26:04 07-02- 2012 24 '42
2S -20
5 and 6 show a further embodiment of a bending tool 1, in which in the safety device 39, the movement transmission between the actuators 55, 56 and the locking element 6 by means of a coupling means 21 in the form of an incompressible coupling fluid 68, e.g. a hydraulic oil is produced, which is contained in one of the actuators 55, 56 leading to the locking element 6 fluid channel 69.
Both on the actuators 55, 56 and the locking element 6 while piston portions 70 are formed, which are sealed out in the tool body 3. The piston portions 70 form on the actuating elements 55, 56, the transfer surfaces 57,58 and the locking element 6, the contact surface 32, wherein the coupling fluid 68 can be moved between them by the fluid channel 69 alternately.
In the illustrated embodiment, close the piston portions 70 on reduced diameter piston rod portions 71 to the sealing bushes 72 outwardly to the actuating surfaces 8,11 b2w. lead to Verriegelungsfbrt sentence 16. On the locking element also engages a return spring 33, which returns the locking element 6 in the locking position 15, and in consequence the coupling fluid 68 and the actuators 55, 56 in the normal position in the absence of an actuating force.
In Fig. 5, the initial position with the locking element 6 in locking stiffener 15 is shown.
6, the actuation of the left operating element 55 is shown, whereby the coupling fluid 68 is pressed by the fluid channel 69 to the locking element 6 and acts on this on the contact surface 32, whereby the locking element 6 is transferred against the return spring 33 in the unlocked position 20 ,
The actuation can also be done manually as described above or by a handling device, e.g. take a pliers gripper. N2011425700 14:26:43 07-02-2012 25 '42 25 «·» ·
• * I -21 -
If none of the actuators 55, 56 pressed, the bending tool 1 can still be used in the tool holder 15, since in this case, the locking element 6 can be pressed against the force of the return spring 33, wherein the piston portion 70 sucks coupling fluid 68 through the fluid channel 69 and at least one of the actuators 55, 56 is retracted due to the Un-terdrucks. Once the locking element 6 can be pressed by the return spring 33 back into the locking position 15, and the retracted actuating element 55,56 is pressed back into the starting position.
In order to compensate for any occurring leakage of coupling fluid 68 may be provided a fluid reservoir 73, in which a supply of coupling fluid 68 is included, and from the if necessary überere a valve assembly, in particular in the form of a check valve 74, a small amount of coupling fluid introduced into the fluid channel 69 becomes.
The fluid reservoir 73 is preferably provided with a pressure-holding piston 75, which is acted upon by a spring element 76 and generates a slight overpressure in the fluid reservoir 73.
FIG. 7 shows a further variant of a bending tool 1 with motion transmission by means of a coupling fluid 68, which largely correspond to the embodiment described with reference to FIGS. 5 and 6.
In this embodiment, the piston portion 70 of the locking element 6 is slidably mounted on the Kolbenstangenabschnrtt 71 and the end of the guided through the Koibenabschnitt 70 piston rod portion 71 is provided with a collar 77. In an adjustment of an actuating element 55, 56 from the illustrated basic position, the locking element 6 is pressed as shown in Fig. 5 by the coupling fluid 68 in the unlocked position 20.
If none of the actuators 55, 56 pressed, the bending tool 1 can still be used in the tool holder 15, since in this fold, the locking element 6 are pressed against the force of the return spring 33 N2011 / 25700 i 25 < · 14:27:24 07-02-2012 26/42 • «• ·
-22 -can, wherein the displaceable piston portion 70 remains in the starting position.
To compensate for leakage, a fluid reservoir 73, as described with reference to FIGS. 5 and 6 may also be provided in this embodiment.
Fig. 8 shows a possible contact point between an actuating element 7, 55, 56 and a coupling element 22 or between a coupling element 22 and a locking element 6, in which at least at one of the contact surfaces to reduce frictional forces during the movement transmission, a friction-inhibiting layer 78 e.g. made of PTFE or a lubricant such as e.g. Graphite is provided.
Alternatively or additionally, as shown in FIG. 9, a contact point between an actuating element 7, 55, 56 and a coupling element 22 or between a coupling element 22 and a locking element 6 for reducing frictional forces in the motion transmission, the transmission surface 30 or the transmission surfaces 40,41 or the control surfaces 29, 31 or the control part surfaces 42,43,63, 64 or the contact surface 32 or contact surfaces 65,66 forming rolling elements 79, for example a rolling bearing ring may be provided.
The embodiments show possible embodiments of the bending tool 1, wherein it should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather also various combinations of the individual embodiments are possible with each other and this variation possibility due to the teaching of technical action representational invention in the skill of those skilled in this technical field. It is thus also possible to subject all conceivable embodiments, which are possible by combinations of individual details of the illustrated and described variant embodiment, to further protection claims.
For the sake of order, it should finally be pointed out that, for a better understanding of the construction of the bending tool 1, this or its constituent parts are partly un-scaled and / or enlarged and / or reduced displayed.
The task underlying the independent inventive solutions can be taken from the description.
Above all, the individual in Figs. 1; 2; 3; 4; 5, 6; 7; Θ; 9 embodiments form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures. N2011 / 25700
14:31:27 07-02-2012
REFERENCE NUMBERS
bending tool
punch
tool body
base section
clamping groove
Riegeielement
actuator
actuating surface
side surface
side surface
actuating surface
actuator
tool cavity
pressing bars
locking position
Locking extension
recess
riding
Versteilrichtung
unlocking
coupling agent
coupling element
adjustment
initial position
initial position
Actuating position Operating position Adjustment direction First control surface Transmission surface Second control surface
Contact surface return spring
operating force
Angle of inclination 36 Bore 37 Length 38 Thickness 39 Safety device 40 Transfer part surface 41 Transfer part surface 42 Control part surface 43 Control part surface 44 Pliers gripper 45 End surface 46 Gripping recess 47 Spreader 48 End surface 49 Plug 50 Guide pin 51 Guide groove 52 Reset element 53 Reset surface 54 Bevel 55 Actuate element 56 Actuator 57 Transmission surface 58 Transmission surface 59 Stop element 60 Guide pins 61 Slotted guide 62 Actu ation control 63 Control section 64 Control section 65 Contact section 66 Contact section 67 Guide pins 68 Coupling fluid 69 Fluid channel 70 Piston section N2011 / 25700 25 14:32:00 07-02-2012 34/42 -2 9- 71 Piston rod section 72 Sealing bush 73 Fluid reservoir 74 Check valve 75 Pressure retaining piston 76 Spring 77 Bearing 78 Layer 79 Rolling element N2011 / 25700

权利要求:
Claims (20)
[1]
25 14:28:28 07-02-2012 7 28/42 -1 - Claims 1. Bending tool (1) for insertion into a tool holder (13), comprising a tool body (3), an adjustable locking element (6) therein for securing the bending tool (1) in the tool holder (13) by engaging in a recess (17) arranged therein, two actuating surfaces (8, 11) accessible from opposite side surfaces (9, 10) on the tool body (3) outside the tool holder (13), which are arranged on at least one actuating element (7) which is adjustable between a basic position (25) corresponding to the locking position (15) of the locking element (6) and an actuating position (27) corresponding to the unlocking position (20) of the locking element (6) , and wherein an adjustment of the actuating element (7) in the direction of the actuating division (27) by means of a coupling means (21) in a movement of the locking element (6) in the direction of the unlocking g (20), characterized in that the coupling means (21) extends from the actuating element (7) to the locking element (6) and has a transfer surface (30) on the actuating element (7) and a contact surface (32) on the locking element (6). contacted, and that the coupling means (21) between the actuating element (7) and locking element (6) substantially in the spacing direction between the actuating element (7) and locking element (6) is displaceably guided in the tool body (3).
[2]
2. bending tool (1) according to claim 1, characterized in that the actuating surfaces (8,11) of two in the tool body (3) mounted and on the coupling means (21) acting actuators (55, 56) are formed.
[3]
3. bending tool (1) according to claim 1 or 2, characterized in that the coupling means (21) by a with a first control surface (29) contacting the transfer surface (30) and with a second control surface (31) contacting the contact surface (32) Coupling element (22) is formed. n-7 in / m 1 ο 1 4 Qf) Ur D 741 p noR / n / 19 -2- 25 • λ m 14:29:09 07-02-2012 29/42
[4]
4. bending tool (1) according to claim 3, characterized in that the actuating element (7) from the basic position (25) in two oppositely oriented to this actuating positions (27) is adjustable and the transmission surface (30) two differently oriented transmission surfaces ( 40, 41) which cooperate with two differently oriented control partial surfaces (42, 43) on the coupling element (22).
[5]
5. bending tool (1) according to claim 3, characterized in that the Kopplungseiement (22) from its with the locking position (15) of the locking element (6) corresponding to the basic position (24) in two oppositely oriented to this actuating positions (26) is adjustable and the second control surface (31) comprises two mutually differently oriented control sub-surfaces (63, 64) which cooperate with two mutually differently oriented Kontaktteilflä chen (65, 66) on the locking element (6).
[6]
6. bending tool (1) according to one of claims 3 to 5, characterized in that the adjustment directions (19, 23, 28) of actuating element (7), coupling element (22) and locking element (6) lie in a common plane.
[7]
7. bending tool (1) according to one of claims 3 to 6, characterized in that the transfer surface (30) and / or at least one control surface (29, 31) and / or the contact surface (32) at least partially as a flat surface with a constant pitch is formed relative to the respective adjustment direction (28, 23, 19).
[8]
8. bending tool (1) according to one of claims 3 to 7, characterized in that the transfer surface (30) and / or at least one control surface (29, 31) and / or the contact surface (32) at least partially as a convexly curved surface with variable Slope based on the respective adjustment direction (26, 23,19) is formed. N2011 / 25700 25 14:29:48 07-02-2012 30/42 -3-
[9]
9. bending tool (1) according to one of claims 3 to 8, characterized in that the control surfaces (29, 31) on the coupling element (22) in its effective portion at an inclination angle (35) between 35 ° and 60 ° inclined to the adjustment ( 23) of the coupling element (22).
[10]
10. Bending tool (1) according to one of claims 3 to 9, characterized in that the contact surface (32) on the locking element (6) cooperating control surface (31) of the coupling element (22) in an inclination angle (35) between 50 ° and 60 °, in particular by 55 ° with respect to its adjustment direction (23).
[11]
11. Bending tool (1) according to one of claims 3 to 10, characterized in that transmission part surfaces (40,41) on the actuating element (7) or transfer surfaces (30,40,41) on two actuating elements (55, 56) and control part surfaces (42 , 43) on the coupling element (22) and / or contact part surfaces (65, 66) on the locking element (6) cooperating control part surfaces (63,64) are arranged symmetrically to the respective basic position (24, 25) and locking position (15) of the considered element ,
[12]
12. bending tool (1) according to one of claims 3 to 11, characterized in that the contacting between Betätigungsetement (7) and coupling element (22) and / or between the coupling element (22) and Riegefelement (6) comprises a slotted guide (61), which is oriented inclined to the adjustment directions of each associated elements (7, 22,6)
[13]
13. Bending tool (1) according to one of claims 3 to 12, characterized in that the transfer surface (30) and / or the control surfaces (29, 31) and / or the contact surface (32) are provided with a friction-inhibiting layer (78) ,
[14]
14. bending tool (1) according to one of claims 3 to 12, characterized in that the transfer surface (30) and / or at least one of the control surfaces (29, 31) and / or the contact surface (32) of a on gt Activation! 1/25700 25 14:30:28 07-02-2012 31 IA2 or the coupling element (22) or on the locking element (9). 6) mounted rolling elements (79) are formed.
[15]
15. Bending tool (1) according to claim 2, characterized in that the coupling means (21) by a substantially incompressible coupling fluid (68) is formed in a tool body (3) from the actuating elements (55, 56) to the locking element ( 6), and in that the transfer surfaces (57, 58) on the actuating elements (55, 56) and the contact surface (32) on the locking element (6) are sealed by piston sections (70) guided in the tool body (3). are formed.
[16]
16. bending tool (1) according to claim 15, characterized in that the fluid channel (69) via a valve arrangement, in particular a check valve (74) with a fluid reservoir (73) is connected.
[17]
17. Bending tool (1) according to claim 15 or 16, characterized in that the fluid reservoir (73) comprises a spring element (76) acted upon pressure holding piston (75).
[18]
18. Bending tool (1) according to one of the preceding claims, characterized in that the actuating element (7) and / or the actuating elements (55, 56) and / or the coupling element (22) and / or the locking element (6) with an in Direction of the basic position (25, 24) or locking position (15) acting return spring (33) is connected.
[19]
19. Bending tool (1) according to one of the preceding claims, characterized in that the coupling means (21) is guided in circular cylindrical bores (36) in the tool body (3) or is contained.
[20]
20. bending tool (1) according to any one of the preceding claims, characterized in that the Betätigungsfiächen (8,11) within N2011 / 25700 25 14:31:05 07-02-2012 32/42 • * * · -5- opposite side surfaces (9t 10) formed on the tool body (3) gripping recesses (46) on the tool body (3) are accessible. TRUMPF Maschinen Austria GmbH & Co. KG. by lawyers EMRGER & Partner Attorney at Law N2011 / 25700

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引用文献:

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法律状态:

优先权:

申请号 | 申请日 | 专利标题

AT1632012A|AT511591B1|2012-02-07|2012-02-07|BENDING TOOL WITH SAFETY DEVICE|AT1632012A| AT511591B1|2012-02-07|2012-02-07|BENDING TOOL WITH SAFETY DEVICE|

PCT/AT2013/050030| WO2013116886A1|2012-02-07|2013-02-06|Bending tool having a safety device|

EP13713065.4A| EP2812134B1|2012-02-07|2013-02-06|Bending tool having a safety device|

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