EP2701860A1

EP2701860A1 - Tool holder for press brake

Info

Publication number: EP2701860A1
Application number: EP12728364.6A
Authority: EP
Inventors: Gerhard Angerer; Klemens Freudenthaler; Josef Gaggl; Matthias HÖRL; Hagen Strasser; Helmut Theis; Thomas Weiss
Original assignee: Trumpf Maschinen Austria GmbH and Co KG
Current assignee: Trumpf Maschinen Austria GmbH and Co KG
Priority date: 2011-04-29
Filing date: 2012-04-26
Publication date: 2014-03-05
Anticipated expiration: 2032-04-26
Also published as: EP2701860B1; AT510969A4; WO2012145781A1; AT510969B1

Abstract

The invention relates to a method for inserting or removing at least one bending tool (1) at a tool holder (2) of a vertically operating press brake, in which a receiving body (5) provided with a slot-like tool interface (3) is transferred from an operating position (13) into a changing position (16) by means of an adjusting movement (17) in relation to a crosshead (6) of the press brake and the angular position of the receiving body (5) is thereby changed by a pivoting angle (19). For releasably fixing a holding portion (4) of at least one bending tool (1) at the tool interface (3), a holding device (8) is coupled with the adjusting movement (17), and the holding device (8) is automatically activated by adjusting the receiving body (5) into the operating position (13) and is also automatically deactivated by adjusting the receiving body (5) into the changing position (16).

Description

Tool holder for press brake

The invention relates to a method according to claim 1 and to a tool holder on a press beam according to claim 6.

To perform different bending tasks on a press brake is often a change of bending tools required. The tool change is a tedious job, especially for large, heavy bending tools, which puts a strain on the operating personnel and can severely reduce the productive time of such a press brake. From the prior art systems are known, for example, from DE 149 439 A, which facilitate a user changing a tool by a tool holder between a working position and a change position is adjustable. Furthermore, e.g. From DE 1 602 595 A revolver-like rotatable tool holder known to shorten set-up times, which can accommodate different tools at the same time and a tool change can be done by simply rotating the revolver-like tool holder. For press brakes these known from the prior art solutions are not satisfactory because revolver-like tool holders require extensive changes to the machine concept of a press brake and the replacement of a bending tool has not been substantially lent relieved.

The object of the invention is to further facilitate the bending tool change on a press brake. The object of the invention is achieved by a method according to claim 1 or a tool holder according to claim 6. The fact that the adjusting device and the holding device are operatively connected, ie coupled, by means of a coupling arrangement ensures that an inserted bending tool is reliably fixed in the working position of the receiving body and further easy removal of a tool without additional measures is possible in the change position. In order to change a bending tool on a conventional press brake, for example on an upper press beam, the tool clamping is to be released in the conventional machines in a first step and then lower the tool in the vertical direction, which can be a heavy physical stress at higher tool weights since the tool is released against the weight force as soon as the tool clamping or tool locking is released lowering, which is an enormous static muscle load. According to the holding section of a bending tool is released only in the change position of the receiving body by the holding device is deactivated and differs by the pivoting of the receiving body, the direction of the weight of the removal direction of the bending tool.

The holding device is designed so that a bending tool located in the receiving body is fixed in the working position such that forces acting on the bending tool, such as weight forces and forces resulting from a forming operation are transmitted without relative movement of the bending tool within the tool holder.

This fixation can be done non-positively, for example, by a clamping device and can also be done alternatively or additionally a positive fixation of the bending tool in the receiving body. For safety reasons, in the case of heavier tools, in many cases a positive fixing is prescribed in order to prevent a bending tool from falling out of the tool holder.

An advantageous variant of the method consists in the embodiment according to claim 2, whereby in the adjustment position of the receiving body, a position adjustment of a bending tool can be performed. The fixation by the holding device is thereby partially canceled in the adjustment position, with a given between holding device and bending tool form fit is maintained, so a removal or falling out of the bending tool from the tool holder is not possible. Any existing clamping is canceled in the adjustment position or reduced so that a shift within the tool cutting parts is possible.

An implementation according to claim 3 may also be advantageous, whereby the current position or position of the receiving body can be easily calculated by a machine control and the drives driven therefrom for carrying out the linear movement and the subsequent pivoting movement. The linear movement is advantageously carried out over a relatively short displacement of up to a few centimeters, while the subsequent pivoting movement is performed by a pivot angle, which allows easy insertion or removal of a bending tool. Such a sequence of movements can with simple guide arrangements and possibly acting Versteilantriebe be accomplished and realized by structurally simple linear guides and pivot bearings.

The process implementation according to claim 4 causes the adjustment movement in the first phase either vertically upwards or vertically downwards, and after this phase, the adjustment of the bending tools within the tool interface is possible, including a prior pivoting of the tool holder or the receiving body is not required is. The pivoting of the receiving body in the change position is thus carried out only in the event that a bending tool to be used or removed. For a pure adjustment, the adjustment is limited to the linear movement to achieve the adjustment position.

Carrying out the method according to claim 5 is advantageous for an operator since a bending tool does not have to be removed directly when the change position is reached, but rather the bending tool is provided to some extent in the released position with the holding device deactivated, without being secured by the user or some handling device would have to be. In the case of a groove-like tool interface, this is the case if the bending tool canted due to its own weight in the tool interface and thereby despite a disabled holding device, without a positive fit is given, a non-positive fixation in the receiving body. This is the case, for example, when the groove-like tool interface points in a horizontal direction or in a slightly rising direction.

The object of the invention is achieved as already mentioned by a tool holder according to claim 6, wherein the coupling between the adjusting movement and the activation or deactivation of the holding device is effected by a coupling arrangement which brings the adjusting device into operative connection with the holding device. The coupling arrangement may comprise mechanical components and alternatively or additionally also control components, wherein in both cases, the coupling of Ver adjusting movement and tool fixing or tool unlocking is achieved.

In one embodiment of the tool holder according to claim 7, a form-fitting fixing of the bending tool in the receiving body is possible by the positive locking element, the Increased security for an operator causes. The recess on the holding portion often has a V-groove-like shape into which a wedge-shaped portion of a positive locking element can be introduced. The positive locking causes the holding portion can not escape from the groove-like tool interface and allows at a reduced clamping force adjusting the bending tool within the tool holder in the longitudinal direction of the groove-like tool interface.

Due to the embodiment according to claim 8, the coupling function can be effected by structurally simple means by the contact element virtually scans the position of the receiving body relative to the pressing beam and converts an adjustment of the contact element in an adjustment of the positive locking element. This conversion can be realized by various types of motion gears in the kinematic sense. Between used components, push joints, swivel joints, bending joints, rolling joints, etc. can be used.

Due to the embodiment according to claim 9 required for the adjustment of the positive locking element in the release position energy is stored as elastic energy in the biasing member in working position of the receiving main body and no separate drive for the holding device or the positive locking element is required, the ment the form-fitting element in the change position disengages with the holding section brings.

According to claim 10, the contact element may be designed as a pressure plate which is pressed in the working position between the receiving body and the pressing beam. Such a flat design of the contact element allows a reliable coupling between the adjusting arrangement and the holding device and the type of adjusting movement can be modified over a wide range without the characteristic of the coupling arrangement being substantially changed.

The embodiment of the tool holder according to claim 11 ensures that the receiving body or the pressure plate arranged between the receiving body and the pressing beam during a bending operation, even when acting transversely to the direction force components exactly retains the position and no such forces acting on the adjustment or from this must be transferred. Corresponding projections can, for example, by Conical projections may be formed, which are integrally arranged on the surface of the press beam or the receiving body, or, for example, as a screw elements which project through a component and project with a tapered approach to a reference surface to the outside.

The coupling of the adjusting arrangement and the holding device can be designed according to claim 12 so that thereby a defined dependence between the adjustment and the position of the contact element is effected relative to the receiving body. For example, a steady increase in the swivel angle can bring about, for example, a steady adjustment of the contact element and thus also of the positive-locking element. Alternatively, it is possible that over the majority of the pivoting angle, the form-locking element remains substantially in engagement with the holding portion of the bending tool and only at the end of the adjustment at a large tilt angle in the vicinity of the change position release from the positive connection element is effected.

In order to fix with a tool holder according to the invention also different width bending tool without retooling and reliable, this can be carried out according to claim 13. Only spring tongues are active, which contact a holding section of a bending tool in the tool interface. The contact forces exerted by the individual spring tongues remain within a defined range since each spring tongue can exert only a certain maximum force.

As an alternative to the above-described embodiment, the tool holder according to claim 14 may be designed with two or more clamping elements and the contact force acting on the contact element from the pressing bar uniformly distributed over the distribution lever on the individual active clamping elements.

An embodiment of the tool holder according to claim 15 allows, despite the use of a structurally and control technology simple Versteilantriebes in the form of a linear actuator a cost-effective way to effect the adjustment of the receiving body. By suitable movement elements, the linear movement can also be converted into the pivoting movement of the receiving body. Due to the embodiment according to claim 16, the adjustment is easy to implement, since the movement of the two pivot points causes in a simple manner and can also be changed. By a synchronous linear movement of the two articulation points a linear rectilinear adjustment of the receiving body is easily achievable and can be used by fixing one of the two articulation points of this as a pivot axis for the pivotal movement of the receiving body.

The development according to claim 17 is a structurally simple way to realize a combination of a linear movement and a pivoting movement.

As an alternative to the mechanical coupling arrangements described above, these can also comprise control engineering components according to claim 18 or be realized by such, whereby for a user the same advantageous functionality of a simplified and easier tool change is given.

The embodiment according to claim 19 allows an operator to remove the tool approximately in the horizontal direction from the tool holder or to insert into this and ensures this change position that a Biegewerkzug remains in the change position despite deactivated holding device in the tool interface. A horizontal alignment of the tool interface is additionally advantageous for an automated bending tool change by means of a handling device.

The embodiment according to claim 20 makes it possible to spend a bending tool even without the receiving body in changing position to insert or remove in the tool holder. The actuating means acts directly or indirectly on the

Clamping device or form-locking device and decouples them in a sense of the adjustment.

Another advantage is an embodiment according to claim 21, since thereby the change position can be set as needed before or after the work plane. Thus, for example, can be facilitated by an operator by a change position in front of the working level, the manual tool change, while a change position behind the working level can facilitate an automated tool change from the back of the machine. In accordance with claim 22, a tool holder according to the invention can also be embodied advantageously on a pressing beam such that the adjusting device of the tool holder is integrated in the pressing beam.

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 shows a section through a tool holder according to the invention in working position;

FIG. 2 shows a section through a tool holder according to FIG. 1 in a change position; FIG.

3 shows a section through a tool holder in a further embodiment in FIG

Working position;

4 shows a section through a tool holder according to FIG 3 in changing position.

5 shows a section through a tool holder in a further embodiment;

6 shows a section through a tool holder in a further embodiment;

7 shows a further possible embodiment of a coupling arrangement on a tool holder according to the invention;

8 shows a view of the coupling arrangement in a tool holder in a section along line VIII-VIII in FIG. 5.

By way of 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 names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location details selected in the description, such as th, laterally, etc. related to the immediately described and illustrated figure and are to be transferred to a new position in a position change accordingly. Furthermore, individual features or combinations of features from the various exemplary embodiments shown and described may also represent separate solutions in their own right, according to the invention or in accordance with the invention.

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 subareas start with a lower one

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.

1 shows a sectional view of a bending tool 1 which is inserted and fixed in a tool holder 2. The tool holder 2 has for this purpose a groove-like tool interface 3, in which a holding portion 4 of the bending tool 1 is inserted. The tool holder 2 comprises a receiving body 5, which has the tool interface 3. The receiving body 5 extends along the longitudinal direction of a press beam 6 of a vertical press brake, not shown. In Fig. 1, the vertical working plane 7 is shown.

The fixing of the holding portion 4 of a bending tool 1 in the tool interface 3 by means of a holding device 8, in which the insertion or removal of a bending tool 1, the fixation can be disabled. The holding device 8 can in this case use a frictional fixing, for example by a clamping device, but preferably comprises a form-fitting element 9 which is adjustable in a recess 10 on the holding section 4 of the bending tool 1. As long as the interlocking element 9 protrudes into the recess 10, a bending tool 1 can not be removed in the removal direction 11 from the tool interface 3. Fig. 1 shows the positive-locking element in a fixing position 12, in which it projects into the recess 10 of the holding portion 4. The positive-locking element 9 in the activated fixing position 12 prevents removal or falling out of the bending tool 1 from the tool interface 3 due to its positive-locking action. The receiving body 5 is located in Fig. 1 in a working position 13, in which it rests with its upper outer side 14 on the undersides of the press bar 6 and forming forces pressing beam 6 and bending tool 1 can transmit. Fig. 2 shows the tool holder 2 according to FIG. 1, wherein the receiving body 5 is adjusted by means of an adjustment 15 in a different from the working position 13 of FIG. 1 change position 16. The adjusting device 15 thus serves to transfer the receiving body 5 from the working position 13 in an adjustment 17 in the change position 16. The adjusting movement 17 in this case comprises a pivoting movement 18, through which the cut of the position of the tool 3 dependent removal direction 11 is changed by a pivot angle 19. In the change position 16 shown in FIG. 2, the removal direction 11 corresponds to an approximately horizontal direction. That is, a bending tool 1 is moved when removing from the tool holder 2 in the horizontal direction to the left in the removal direction 11 and moves when inserted into the tool holder 2 to the right in a not specifically shown insertion direction.

In order to effect the pivoting angle 19 between the working position 13 and the change position 16, the adjusting device 15 comprises a pivoting arrangement 20, which in the embodiment according to FIGS. 1 and 2 comprises a simple rigid pivot axis 21 on the pressing beam 6, around which the receiving body 5 is pivotably mounted is. To carry out the adjusting movement 17, which consists in the illustrated embodiment of FIG. 1 and 2 only from a pure pivoting movement 18, the receiving body 5 is coupled to an adjusting drive, not shown, which introduces the adjustment forces or Verstellmomente required for adjustment in the receiving body 5. For example, a coincident with the pivot axis 21 pivot shaft may be provided, which is connected to the receiving body 5 torque-resistant and which is driven by a lever or a motor. The receiving body 5 and a possibly inserted therein bending tool 1 remains in the change position 16 until it is moved back to the working position 13. The position assurance in the change position 16 as well as in the working position 13 can be done by the adjustment drive by this is carried out self-holding or by an independent position assurance. The position of the pivot axis 21 and the outer shape of the pressing beam 6 and receiving body 5 are chosen so that the Pivoting movement 18 can be performed freely, with an optional pivoting on both sides of the working level 7 can also be provided.

In the change position 16, the holding device 8 is deactivated in order to enable the setup, whereby a bending tool 1 can be removed in the removal direction 11 and inserted into the tool interface 3 opposite thereto. In a clamping device, the clamping forces are released or reduced so that a removal and insertion of a bending tool 1 is possible. In the illustrated holding device 8 with a positive locking element 9, this is spent from the fixing position 12 shown in FIG. 1 in a release position 22 shown in FIG. 2, in which it does not protrude into the recess 10 on the holding portion 4 of the bending tool 1 and this in the Movement in the tool interface 3 not hindered.

According to the invention, the adjusting device 15 is coupled to the holding device 8 such that the holding device 8 is activated in the working position 13 of the receiving body 5 and is deactivated in the change position 16. For this purpose, adjusting device 15 and holding device 8 are operatively connected by means of a coupling arrangement 23. The fitting of bending tools 1 is substantially facilitated by the tool holder 2 according to the invention, since the coupling arrangement 23 causes the holding device 8 is activated in the working position 13 and a bending tool 1 is fixed for a forming operation on the pressing beam 6 and the holding device 8 in the change position 16th is automatically deactivated, whereby a tool change can take place. In addition, the tool change is substantially facilitated by a given between working position 13 and change position 16 swivel angle 19. If in a conventional tool holder, which is not pivotable, the holding device 8 is deactivated for a tool change, the weight of the bending tool 1 is suddenly effective and this must be collected by the user or a suitable support structure. By the vertical removal direction 11 further bending tool 1 must then be controlled and lowered sensitively, to which a vertically upwardly acting support force is required, which must correspond to the weight force at a slow movement about. This requires of an operator high static muscle forces that still need to be dosed sensitively. The same request is for a handling device, for example an industrial robot which is used for an automated tool change, valid.

As a result of the pivoting angle 19 pivoted about the change position 16 of the Aufnahmekör- 5 results in a corresponding angle between the vertically downwardly acting weight and the removal direction 11. If the pivot angle is about 90 °, as shown in Fig. 2, the bending tool 1 after Deactivation of the holding device 8 for the time being held by the receiving body 5. To remove a bending tool 1, an operator relieves the tool interface 1 by lifting the bending tool 1 and this can be removed from the tool interface 3 in a brisk movement without any special requirements for metering the speed of movement in the horizontal direction. As a result, a static muscle load, as is the vertical removal of a bending tool 1, largely prevented and tool change can also be supported by means of simple devices, since they must be formed only for an approximately horizontal movement of bending tools 1 and not for a controlled lowering.

The coupling arrangement 23 can be based on mechanical operation or else on control technology operation. In Fig. 1 and 2 is as an exemplary embodiment of a mechanical coupling between the adjusting device 15 and the holding device 8, a contact element 24 on the receiving body 5 adjustably mounted, which cooperates with the pressing beam 6, in which it can scan the relative position of the receiving body 5 to the pressing beam 6 and an adjustment of the contact element 24 causes an activation or deactivation of the holding device 8, in which the adjusting movement is mechanically transmitted to the mold closing element 9.

Fig. 1 shows the receiving body 5 in working position 13, in which the outer side 14 of the receiving body 5 rests against the underside of the press bar 6. As a result, the contact element 24, which may be, for example, a simple rounded bolt in a bore in the receiving body 5, is pressed into the interior of the receiving body 5 and this position is transferred to the fixing position 12 of the positive locking element 9. For this purpose, the contact element 24 is connected to the positive-locking element 9 with transmission elements (not shown). In contrast, Fig. 2 shows the receiving body 5 in changing position 6, in the the outer surface 14 does not abut the pressing beam 6. The contact element 24, which is resiliently mounted in the receiving body 5, can thereby emerge from this, wherein this position of the contact element 24 is transferred to the release position 22 of the positive-locking element 9. The same functionality of the automatic activation or deactivation of the holding device 8 can also be achieved in the case of a frictionally-acting holding device 8 without a positive-locking element 9, but can be achieved by a clamping element.

Such a contact element 24, which to some extent scans the outer surface of the press bar 6 during the adjusting movement 17, can also be used to partially deactivate the holding device 8 in an intermediate position between the working position 13 and the change position 16 of the receiving body 5, whereby the removal takes place a bending tool 1 in removal direction 11 is still prevented, however, a displacement of the holding portion 4 in the longitudinal direction of the groove-like tool interface 3 is made possible transversely to the removal direction 11. This can be effected by slightly withdrawing or relieving the interlocking element 9, whereby the rigid

Fixing in the tool interface 3 can be repealed. Such an intermediate position of the receiving body 5 may be referred to as adjustment position 25, which is indicated in Fig. 2 in dotted lines. This controlled influencing of the holding device 8 can be brought about, for example, by setting the displacement path of the contact element 24 relative to the receiving body 5 by a mechanical control element 26 in relation to the currently prevailing swivel angle 19. The control is formed in the embodiment according to FIGS. 1 and 2 by the outer surface 27 of the press bar 6, which by appropriate shaping the desired relationship between

Swivel angle 19 and partial deactivation of the holding device 8 created. The outer surface 27 may be shaped in the form of a suitable cam.

As an alternative to a contact element 24 which scans the outer surface 27, it is also possible to provide a control lever which connects the pressing beam 6 to the holding device 8 and converts the adjusting movement 17 of the receiving body 5 into an adjusting movement of the form-locking element 9. For this purpose, the control lever is attached to the holding device 8 and at a distance from the pivot axis 21 articulation point on the pressing beam 6. 1 and 2 further show a recess 28 on the underside of the press bar 6, which cooperates in the working position 13 of the receiving body 5 with a projection 29 on the outer side 14 of the receiving body 5. This serves to secure the position of the receiving body 5 during the possible occurrence of forming forces which are oriented transversely to the working plane 7 and serves to relieve the adjusting device 15, which otherwise would have to contribute to the transmission of force.

In Fig. 1 is further shown as an alternative to the mechanical coupling arrangement 23 a dash-dotted lines control engineering coupling assembly 23 in which the position or position of the receiving body 5 by means of a position sensor 30, for example, a rotary encoder in the pivot axis 21 is detected and a control device 31st is provided, which outputs control signals to an actuator 32 of the holding device 8 in dependence on the determined position of the receiving body 5. If the working position 13 of the receiving body 5 is detected by the position sensor 30, the holding device 8 is activated by means of the actuator 32, which acts in particular on the interlocking element 9, while disabled at change position 16 of the receiving body 5, the holding device 8 is deactivated by the control device 31 becomes.

The fixed part of the tool holder 2 illustrated in the figures as a pressing beam 6 can also be a base part detachably fastened to the actual pressing beam of a press brake, which can be removed from the pressing beam together with the receiving body 5 when the tool holder 2 is replaced.

3 and 4, a further embodiment of a tool holder 2 is shown in a schematic sectional illustration, wherein in FIG. 3 the working position 13 of the receiving body 5 and in FIG. 4 the change position 16 of the receiving body 5 is shown. Unlike in the embodiment according to FIGS. 1 and 2, in which the adjusting movement effected by the adjusting device 15 is a pure pivotal movement 18 due to the pivot axis 21 which is rigid on the pressing beam 6, the adjusting device 15 effects a displacement movement 17 in FIGS. 3 and 4 , which is composed of a linear movement 33 and a pivoting movement 18. This composite adjusting movement 17 is achieved in that two spaced-apart articulation points 34 and 35 are arranged on the receiving body 5, which are guided or driven by the adjusting device 15 in a suitable manner. In order to effect a linear movement 33 of the receiving body 5, the two articulation points 34 and 35 are adjusted in parallel direction and by the same distance, whereby the linear movement 33, that is, a translational movement is effected. At the end of this linear movement 33, for example, the first articulation point 34 is fixed in its position, while the second articulation point 35 is guided on a circular path about the first articulation point 34. The first articulation point 34 thereby forms a pivot axis 21 for a relative pivoting movement 18 of the second articulation point 35 and thus also the receiving body 5. In Fig. 2, the left articulation point 34 is fixed at the end of the linear movement 33 and in consequence the right articulation point 35 on a circular path pivoted around this, creating a

Pivoting movement of the receiving body 5 is caused to the left. Of course, a pivoting movement to the right can also be effected, in which the right articulation point 35 is fixed and the left articulation point 34 is guided around this on a circular path. If the linear movement 33 is omitted, the adjusting movement 17 corresponds to the simple pivoting movement 18 in FIGS. 1 and 2.

As further shown in FIG. 4, the adjusting movement 17 can also comprise a pivoting movement 18 'which pivots the receiving body 5 to the right in an alternative change position 16' with respect to the working plane 7, whereby a tool change from the other machine side is possible. This optional pivoting in both directions with respect to the working plane 7 is made possible by appropriate design of the adjusting device 15. In FIGS. 3 and 4, the articulation point 34, which is left with respect to the working plane 7, forms a first pivot axis 21 and the articulation point 35, which is the right articulation point 35, a second pivot axis 36 either the left pivot axis 21 or the right pivot axis 36 to achieve the pivot angle 19. In this embodiment, the adjusting device 15 based on structurally simple to implement linear guides, by means of which the articulation points 34 and 35 are moved. The left articulation point 34 is guided by means of a first linear guide 37 relative to the pressing beam 6 and the right articulation point 35 is guided by means of a second linear guide 38 relative to the pressing beam 6. The linear guide 37 can For example, be structurally very simple formed by a straight guide rod 39 which is slidably mounted in a bore 40 in the pressing beam 6 and is pivotally connected at its lower end to the pivot point 34. The bore 40 advantageously runs parallel to the working plane 7, but could also have a different direction. A displacement of the guide rod 39 in the bore 40 thus causes a linear movement of the left pivot point 34. The right second linear guide 38 is also formed for example by a guide rod 39 and a bore 40 in the pressing beam 6. However, since the right pivot point 35 is not limited to a linear movement 33 but should also perform a pivoting movement 18, a steering lever 41 is interposed between the lower end of the right guide rod 39 and the second pivot point 35. Alternatively, other possibilities are given for the second pivot point 35 in addition to the given by the linear guide 38 degree of freedom in the working direction 7 to provide a degree of freedom transversely thereto, for example by the pivot point 35 is not fixed to the receiving body 5 but for example in a backdrop transverse to the direction of Linear guide 38 is guided.

3 and 4 further show a possible embodiment of the holding device 8, as well as the coupling arrangement 23, with which the holding device 8 can be activated or deactivated in dependence on the position of the receiving body 5. The holding device 8 summarizes in the illustrated embodiment, a positive locking element 9, which engages in the working position 13 (see FIG. 3) in a recess 10 on the bending tool 10 and this fixed in the tool holder 2 and in the change position 16 (see FIG. 4). out of the recess in the release position 22 is adjusted and a bending tool 1 releases. The contact element 24 is formed in this embodiment by a pressure plate 42 which is mechanically coupled via the coupling arrangement 23 with the positive-locking element 9. The pressure plate 42 is pressed in working position 13 from the receiving body 5 against the pressing beam 6 by the adjusting device 15 biases the receiving body 5 in the working position 13 in the direction of the press beam. If the receiving body 5 is released by means of the adjusting device 15 from the pressing beam 6, the pressure plate 42 is brought by a biasing member 43, for example in the form of a compression spring in distance from the receiving body 5 and thereby the positive-locking element 9 is moved from the fixing position 12 in the release position 22. Alternatively, a biasing member 44 may also act on the interlocking element 9, in which it biases this in the release position 22. By the displacement of the contact element 24, Here, in the form of a pressure plate 42, as described above, the activation or deactivation of the holding device 8 can also take place such that an adjustment position is assumed in an intermediate position between working position 13 and release position 16, in which a displacement of bending tools 1 in the longitudinal direction the groove-like recess 3 is possible.

FIG. 5 shows a further embodiment of the tool holder 2, which is possibly independent of itself, wherein the same reference numerals or component designations are again used for the same parts as in the preceding FIGS. 1-4. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS. 1-4.

The adjusting device 15 corresponds in the exemplary embodiment according to FIG. 5 approximately to the mechanism shown in FIGS. 3 and 4 in which two articulation points 34 and 35 are distanced transversely to the working plane 7 and which are guided by means of two linear guides 37 and 38 arranged in the pressing beam 6 , In this embodiment, the left linear guide 37 between the guide rod 39 and the left pivot point 34, a steering lever 45 which is connected at the lower end of the guide rod 39 with a hinge 46. This joint 46 is deactivated in the illustrated embodiment by means of a locking pin 47, which passes both the left guide rod 39 and extends into the left steering lever 45. The locking pin 47 thus prevents pivotal movement of the second steering lever 45 in the joint 46 and the left pivot point 34 is adjustable only on a straight line. The right articulation point 35 is, as already described with reference to FIG. 4, movable along a straight line and a further lowering of the right guide rod 39 causes after fixing the left articulation point 34 via the steering lever 41 pivotal movement of the second articulation point 35 to the left fixed articulation point 34th and thus a pivoting movement of the receiving body 5. The two guide rods 39 of the linear guides 37 and 38 are driven by a linear actuator 48, for example in the form of a hydraulic cylinder, via a drive plate 49, a downward movement on a collar 50 on the right guide rod 39th transmits and transfers its upward movement via a paragraph 51 on a collar 52 on the left guide rod 39. The downward movement of the left guide rod 39 is thereby blocked by means of a stop element 53, which thereby defines the end of the linear movement 33. During the downward movement of the drive plate 49, the right guide rod 39 is thus driven, which also carries the left guide rod 39 up to the stop element 53 via the receiving body 5. The return to the working position 13 is carried out by lifting the drive plate 49, whereby the receiving body 5 can swing down due to its own weight in the working position 13, while the right guide rod 39 pushes up and in succession by lifting the collar 52 on the paragraph 51, thereby the left guide rod 39 is lifted together with the receiving body 5 and the right guide rod 39 and is pressed in the working position 13 against the pressing bar 6.

In the pivoting movement 18, the position of the contact element 24 in the form of the pressure plate 42 by means of a control element 26 in the form of a control cam 54 in relation to the pivot angle 19 is set. The control cam 54 has a variable radius, wherein in the illustrated embodiment, the minimum radius 55 is achieved at a pivot angle of 19 of about 90 °.

The exemplary embodiment according to FIG. 5 is also distinguished by the fact that the linear guides 37 and 38 are designed symmetrically to the working plane 10 and furthermore by pivoting the stop element 53, the driver disc 49 and the locking pin 47 on the right side, the pivoting direction from the left to can be changed to the right. This can also take place in that the two linear guides 37 and 38 each receive their own drives, and the deactivation of the steering levers 41 or 45 at the lower end of the guide rods 39 by means of a locking bolt 47 can also be optionally. The adjusting device 15 can therefore also allow opposing pivoting movements 18, 18 ', whereby changing positions 16, 16' can be assumed on both sides of the working plane 7.

An optional pivoting of the receiving body 5 in both directions, ie with respect to the working plane 7 to the left or to the right, is also feasible in an embodiment with only one pivot axis 21, which can lie in particular in the working plane 7. FIG. 6 shows a further embodiment of the receiving body 5, which is possibly independent of itself, as it can be used in a tool holder 2. In particular, it is suitable for use with an adjusting device 15 according to FIG. 5. In this case, the same reference numerals or component designations are again used for the same parts as in the preceding FIGS. 1-5. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS. 1-5.

FIG. 6 shows an alternative embodiment of the holding device 8, which is activated or deactivated by means of the contact element 24, here again in the form of a pressure plate 42. The form-fitting element 9 here consists of a clamping strip 56, which extends in the longitudinal direction of the groove-like tool interface 3 and is pivotally mounted about a pivot point 57 in the receiving body 5. The fixing of the holding section 4 in the tool interface 3 via spring tongues 58, which are generated by parallel cuts in the terminal block 56. The clamping strip 56 or the individual spring tongues 58 have projections which can be adjusted into the recess 10 of the bending tool 1. The adjustment is effected by a wedge member 59 which also extends in the longitudinal direction of the groove-like tool interface 3 and is vertically adjusted by the contact element 24, wherein a wedge surface 60, the vertical adjustment of the wedge member 59 in a

Swivel movement of the terminal block 56 converts.

The articulation points 34 and 35 are, as in the embodiment according to FIGS. 3, 4 and 5 to Anlenkforts etches 61, which distance the pivot points 34, 35 from the receiving body 5 and thereby the left pivot point 34, which after the end of the linear movement 33rd serves as a pivot axis 21, can lie in the working position within the press bar 6.

FIG. 7 shows yet another embodiment of a holding device 8, which is similar to the holding device 8 shown in FIGS. 3 and 4 and in which an adjustment of a contact element 24 causes a displacement of the form-fitting element 9. In the illustrated embodiment, an actuating element 62 is arranged in the pressing beam 6, the actuation, for example by pulling, the same effect on the holding device 8 and the contact element 24 has as an adjustment of the receiving body 5. This allows a bending tool 1 regardless of the position of the receiving body 5 relative to the press bar 6 are removed by the additional actuator 62 from the tool interface 3. Such an actuating element 62 may alternatively also be provided on the receiving body 5, wherein this can also temporarily deactivate the holding device 8, independently of the position of the receiving body 5, if necessary.

FIG. 8 shows a section through a receiving body 5 with a further embodiment of the holding device 8. The section in FIG. 8 corresponds to a section along the line VIII-VIII in FIG. 5. In this case, the movement of the contact element 24 takes the form of a pressure plate 42 via force application points 64 and downstream distribution lever 65 to the individual form-fitting elements 9, here in the form of clamping elements 66, distributed forwarded.

An inventive tool holder 2 can also be combined with bending tools 1, which themselves have an integrated safety lock with an actuation directly on the bending tool 1, wherein the tool change can also be substantially facilitated.

The embodiments show possible embodiments of the tool holder 2, wherein it should be noted at this point that the invention is not limited to the specifically illustrated embodiments of the same, but also various combinations of the individual embodiments are mutually possible and this variation possibility due to the teaching of technical action representational invention in the skill of those skilled in this technical field. Thus, all conceivable embodiments that are possible by combinations of individual details of the embodiment variant shown and described are also encompassed by the scope of protection.

For the sake of order, it should finally be pointed out that for a better understanding of the construction of the tool holder, this or its components have been shown partly unevenly and / or enlarged and / or reduced in size.

The task underlying the independent inventive solutions can be taken from the description. Above all, the individual embodiments shown in Figures 1, 2, 3, 4, 5, 6, 7, 8 can 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.

S u b e c u s e c tio n a tio n s

Bending tool 36 pivot axis

Tool holder 37 Linear guide

Tool interface 38 Linear guide

Holding section 39 guide rod

Receiving body 40 bore

Pressing beam 41 Steering lever

Working plane 42 pressure plate

Holding device 43 biasing element

Positive locking element 44 biasing element

Recess 45 steering lever

Removal direction 46 Joint

Fixing position 47 locking pin

Working position 48 Linear actuator

Outer surface 49 drivers

Adjustment device 50 collar

Change position 51 paragraph

Adjustment movement 52 collar

Swiveling movement 53 stop element

Swivel angle 54 control cam

Swivel assembly 55 Minimum distance

Swivel axis 56 Terminal block

Release position 57 Pivot point

Coupling arrangement 58 spring tongue

Contact element 59 Wedge element

Adjustment position 60 wedge surface

Control 61 Anlenkfortsatz

Outer surface 62 actuator

Recess 63 spring

Lead 64 force introduction point

Position sensor 65 Distributor lever

Control s Device 66 Clamping element

actuator

linear motion

articulation

Claims

Patent claims

1. A method for inserting or removing at least one bending tool (1) on a tool holder (2) of a vertically operating press brake, wherein a with a groove-like tool interface (3) provided receiving body (5) by means of an adjusting movement (17) relative to a pressing beam ( 6) of the press brake from a working position (13) is converted into a change position (16) and thereby the angular position of the receiving body (5) is changed by a pivot angle (19), characterized in that a holding device (8) for releasably fixing a Holding portion (4) of at least one bending tool (1) on the tool interface (3) with the adjusting movement (17) is coupled and the holding device (8) by adjusting the receiving body (5) in the working position (13) is automatically activated and is automatically deactivated by adjusting the receiving body (5) in the change position (16).

2. The method according to claim 1, characterized in that the holding device

(8) during adjustment of the receiving body (5) in between working position (13) and change position (16) lying adjustment position (25) is partially deactivated and thereby a displacement of the holding portion (4) within the tool cutting parts (3) transversely to the removal direction (11) is feasible.

3. The method according to claim 1 or 2, characterized in that the adjusting movement (17) from the working position (13) in the change position (16) from a linear movement (33) and a subsequent pivoting movement (18) is composed.

4. The method according to claim 2 and 3, characterized in that the adjustment position (25) at the end of the linear movement (33) is achieved.

5. The method according to any one of claims 1 to 4, characterized in that in the change position (16) the tool interface (3) is oriented so that a bending tool (1) even when the holding device (8) due to its own weight on the Tool interface (3) or on the receiving body (5) remains.

6. Tool holder (2) on a pressing bar (6) of a press brake comprising a receiving body (5) with a groove-like tool interface (3), an adjusting device (15) for adjusting the receiving body (5) relative to the pressing bar (6) between a working position (13) and a change position (16), wherein the adjusting device (15) comprises a pivoting arrangement (20) with which the angular position of the receiving body (5) between working position (13) and change position (16) by a pivot angle (19) can be, and a holding device (8) for releasably fixing a holding portion (4) at least one bending tool (1) on the tool interface (3), characterized in that the adjusting device (15) and the holding device (8) by means of a coupling arrangement (23) are operatively connected and the coupling arrangement (23) activates the holding device (8) in the working position (13) and deactivates it in the change position (16).

7. Tool holder (2) according to claim 6, characterized in that the holding device (8) in a recess (10) of the holding portion (4) adjustable form-closing element (9) and this at least in an activated, the holding portion (4 ) against removal locking, fixing position (12) and a deactivated, the holding section (4) releasing, release position (22) can be brought.

8. Tool holder (2) according to claim 7, characterized in that the coupling arrangement (23) with the form-locking element (9) mechanically coupled, on the receiving body (5) adjustably mounted and with the pressing beam (6) cooperating control or contact element ( 24) and this moves in the change position (16) of the receiving body (5) the positive-locking element (9) in the release position (22).

9. Tool holder (2) according to claim 8, characterized in that the contact element (24) and / or the positive-locking element (9) by means of a biasing member (43, 44) is biased in the release position (22).

10. Tool holder (2) according to claim 8 or 9, characterized in that the contact element (24) in the working position (13) as a pressure plate (42) between the receiving body (5) and the pressing beam (6) is effective.

11. Tool holder (2) according to any one of claims 6 to 10, characterized in that the pressing beam (6) facing the outer surface (14) of the receiving body (5) or the pressure plate (42) has at least one recess or a projection (29) which cooperates in the working position (13) with a projection or a recess (28) on the pressing bar (6).

12. Tool holder (2) according to one of claims 8 to 11, characterized in that the displacement of the contact element (24) relative to the receiving body (5) by a mechanical control element (26), in particular a pivot axis (21) surrounding the control cam (54 ) is set in relation to the currently prevailing swivel angle (19).

13. Tool holder (2) according to one of claims 7 to 12, characterized in that the positive-locking element (9) by a in the tool receiving interface (3) adjustable and by the contact element (24) actuated terminal block (56) with a plurality of spring tongues (58 ) is formed.

14. Tool holder (2) according to one of claims 7 to 12, characterized in that the positive-locking element (9) is formed by at least two clamping elements (66) and the pressing beam (6) acting on the contact element (24) contact force starting from each a force application point (64) via distribution lever (65) to the individual clamping elements (66) is forwarded.

15. Tool holder (2) according to any one of claims 6 to 14, marked thereby, that the adjusting device (15) on the receiving body (5) acting linear actuator (48).

16. Tool holder (2) according to one of claims 6 to 15, characterized in that the receiving body (5) has at least two mutually distanced articulation points (34, 35) which are guided by the adjusting device (15) and of which one of

An articulation points (34) in the course of the adjusting movement (17) defines a pivot axis (21) for a relative pivoting movement (18) of the other articulation point (35).

17. Tool holder (2) according to claim 16, characterized in that the receiving body (5) has two mutually distanced pivot axes (21, 36), wherein a first pivot axis (21) by means of a first linear guide (37) relative to the pressing beam (6). is adjustable and a second pivot axis (36) by means of a parallel second Linearfüh- tion (38) and an adjoining steering lever (41) relative to the pressing beam (6) is adjustable.

18. Tool holder (2) according to claim 7, characterized in that the coupling arrangement (23) at least one position sensor (30) for detecting the change position (16), a control device (31) and an actuator (32) for the holding device ( 8) or the positive-locking element (9).

19. Tool holder (2) according to any one of claims 6 to 18, characterized in that the removal direction (11) of the groove-shaped tool interface (3) in the change position (16) of the receiving body (5) in the horizontal direction or up to 30 ° rising towards the horizontal.

20. Tool holder (2) according to one of claims 6 to 18, characterized in that on the holding device (8) or the contact element (24) acting Actuate element (62) is provided, at least in the working position (13) or in any position of the receiving body (5) enables deactivation of the holding device (8).

21. Tool holder (2) according to one of claims 6 to 20, characterized in that the receiving body (5) by means of the adjusting device (15) with respect to the working plane (7) optionally two opposing pivoting movements (18, 18 ') can perform and Thereby changing positions (16, 16 ') on both sides of the working plane (7) can take.

22. Press beam (6) with a tool holder (2) according to one of claims 6 to 21, characterized in that the adjusting device (15) of the tool holder (2) in the pressing beam (6) is integrated.