EP3119540A1

EP3119540A1 - Drive device for driving a tool slide in a folding system

Info

Publication number: EP3119540A1
Application number: EP15712565.9A
Authority: EP
Inventors: Uwe Feis
Original assignee: ThyssenKrupp AG; ThyssenKrupp System Engineering GmbH
Current assignee: ThyssenKrupp AG; ThyssenKrupp System Engineering GmbH
Priority date: 2014-03-20
Filing date: 2015-03-18
Publication date: 2017-01-25
Also published as: WO2015140204A1; CN106102945A8; DE102014103827A1; CN106102945B; CN106102945A; US20170122417A1

Abstract

The invention relates to a drive device for driving a tool slide in a folding system, the drive device comprising a slide plate, which is indirectly or directly connected to the tool slide, and a drive shaft, which can rotate about an axis of rotation. A rotational movement of the drive shaft can be converted by means of a cam to a linear movement of the slide plate, said movement proceeding along a direction of advancement.

Description

DESCRIPTION

Title Drive device for driving a tool slide in a folding machine

State of the art

The present invention relates to a drive device for driving a

Tool slide along a feed direction in a folding machine and a method for driving a tool slide.

Such drives are used for example in industrial manufacturing plants to reshape semi-finished products or components. In particular, the drive devices in question are in folding systems again, in which typically sheets are folded and in which a driven tool slide deforms the workpiece. In this form of bending deformation, the accuracy with which the tool slide is driven is often decisive for the quality of a folding operation. Folded components are often the best part of exterior cladding or sheathing. Therefore, their appearance - which is influenced by the quality of the folding operation - often the reason that in folding operations as high as possible in terms of

Position accuracy or position safety of the tool slide is required. The prior art knows as a drive device pneumatic or hydraulic cylinder, with which the tool slide are driven, which are arranged in a plane with the workpiece and thereby take a lot of space in hogging. Moreover, there is the problem in the drive devices of the prior art that the workpiece is usually not locked without further effort against an unwanted (the feed movement) opposite or further movement. This adversely deteriorates the positional accuracy when shifting.

Disclosure of the invention

It is an object of the present invention to provide a device with which a tool slide in a folding system, as accurate as possible with simultaneous high clocking, d. H. low cycle time, can be moved. It is desirable that in a simple and space-saving manner, the tool slide when folding in his

Movement and positioning remains essentially unaffected by this acting movements.

The object of the present invention is achieved by a drive device for driving a tool slide in a folding system, wherein the drive device has an indirectly or directly connected to the slide valve slide plate and a rotatable about a rotation axis drive shaft, wherein a rotational movement of the drive shaft by means of a cam in a along the feed direction extending linear movement of the slide plate is transferable. Compared to the prior art, the drive device according to the invention has the advantage over the drive shaft to control the linear movement of the slide plate and thus of the tool slide, wherein the linear movement is responsible for that a placeable in the folding machine workpiece is formed by the tool slide, in particular folded. Furthermore, it is omitted in an advantageous manner to pneumatic and hydraulic cylinders, whereby the cycle time can be reduced. In this case, the cam preferably also assumes the task of locking the tool slide in the processing position, which otherwise by a permanent

Maintaining the pressure in the cylinder would have to be realized. In particular, the cam is positionable such that it blocks directly or indirectly a return movement of the tool slide when acting on the tool slide due to the folding process or other causes repercussions.

Preferably, the workpiece is a sheet that is formed, for example, to a hood for a motor vehicle. In this case, the workpiece during folding along the feed direction interacts positively with the tool slide whose movement causes the folding. It is further provided that the cam plate is designed such that it temporarily acts as a force flux means on the slide plate during a rotation about the rotation axis and thereby realizes either the movement of the slide plate along the feed direction or the blocking in the processing position. The drive shaft has preferably a torque and a

Angular velocity. By acting as a force flux cam is

- The torque of the drive shaft in a force of the slide plate and

- The angular velocity of the drive shaft in a translation speed of the slide plate

transferable. Advantageous embodiments and modifications of the invention are the dependent claims, as well as the description with reference to the drawings.

In a further embodiment, it is provided that the drive device comprises an electric drive, preferably an electric motor, for the rotational movement of the drive shaft. This makes it possible in a particularly simple and precise manner, the torque or the angular velocity of the drive shaft and thus also the

Control or check the linear movement of the slide plate. In a further embodiment, it is provided that the axis of rotation in

Substantially perpendicular to the Vorhubvorrichtung runs. As a result, a device used to drive the drive shaft can advantageously be arranged in a space-saving manner above or below the plane along which the tool slide is moved. In a further embodiment, it is provided that the drive shaft is rotatably connected in a coupling region with the cam, wherein the

Coupling range is arranged eccentrically on the cam. Due to the eccentric positioning of the coupling region can be advantageously a stroke, d. H. determine the distance covered by the slide plate when pressing forward. It is conceivable that the cam has a slot, wherein the drive shaft is continuously feasible along the slot and fixable at a desired location. This makes it easy to change an eccentricity of the positioning of the coupling region and thus adjust the stroke. In a further embodiment, it is provided that the slide plate a

Having guide block, the guide block at least temporarily along the

Feed direction is arranged form fit to the cam. It is conceivable that the cam repeatedly or permanently cooperates during rotation of the drive shaft form-fitting manner with the cam. Preferably, the act

Guide block and the cam at the time form-fitting together, in which the tool slide has taken a folding position. As a result, the tool slide is prevented from doing so by a simple and thus advantageously the tool slide

Feed direction opposite movement to leave the desired, in particular provided folding position again. In other words, the tool slide is locked in the processing position. In particular, it is provided that the cam is configured such that during a rotation said locking is synchronized with other processes in the folding system, such as the supply and discharge of the Workpiece.

In a further embodiment, it is provided that the slide plate has a further guide block, wherein the further guide block is at least temporarily arranged along one of the feed direction opposite direction positively to the cam. In particular, the guide block and the further guide block are arranged along a connecting line, wherein the connecting line extends substantially parallel to the feed direction. In a further embodiment, it is provided that the guide block and / or the further guide block has a cam roller, wherein the cam roller is rotatable about an axis parallel to the axis of rotation and at least temporarily brought into contact with the cam. Through the curve scooter, the guide block along the

Roll off the cam at least temporarily. This reduces the advantage in an advantageous way

Likelihood of jamming and simultaneously reduces wear occurring at the guide block, which are caused by the continuous juxtaposition.

In a further embodiment, it is provided that the guide block and / or the further guide block are biased such that the contact between the

Cam and the guide block and / or the further guide block is maintained during rotation of the cam during the rotation of the drive shaft.

The prerequisite is that the guide block is displaceable relative to the further guide block along the connecting line. For example, the further guide block is slidably intergrated in the slide plate. As the cam rotates, the distance between the guide pad and the further guide pad changes. By the

Existence of the contact, the position accuracy in the movement of the

Slider plate further improved.

In a further embodiment, it is provided that a curve of the

Cam defines the drive of the tool slide along the feed direction. In the course of the curve, the circumferential profile of the cam disk is to be understood along a direction perpendicular to the axis of rotation. In particular, can be realized or determined by a certain curvature of the curve speed profiles in the linear movement of the slide plate. It is provided that the curvature of the curve is optimally adapted to the processing of the respective workpiece, in particular to the respective folding process. In a further embodiment, it is provided that the curve of the

cam

Determines at least one fixed position of the slide plate and / or,

- Having a first circular Teilsegement with a first radius and a second circular sub-segment with a second radius, wherein the second radius is greater than the first radius. Preferably, there are up to four fixed positions. In a fixed position, the slide plate is not moved by the outgoing force from the cam disk. It is conceivable here that the cam plate is designed such that it is in a certain rotational position while positively to a part of the

Slider plate, preferably to the guide block, is arranged, but exerts no force on the slide plate. In such a rotational position is the

Drive device advantageously also for preventing unwanted

Movements of the workpiece. Furthermore, can be by a first circular

Partial segment, whose first radius is smaller than the second radius, accelerate the movement of the slide plate and thus of the tool slide in an advantageous manner.

In a further embodiment, it is provided that the slide plate has an adapter for a plurality of different tool slide. Preferably, depending on the component to be folded between the different tool shifter be changed. In particular, the tool slide can be adapted to the respective type of component. As a result, many different components can be folded in a folding system under certain circumstances.

In a further embodiment, it is provided that

- The slide plate and / or the cam are interchangeable and / or

- Between protective plate and cam a protective means is arranged. As a result, the large number of possible components can be further increased. Insbeondere can then be a variety of different sized components crumpled with the same folding machine by simply the drive device with the appropriate slide plate and / or the appropriate cam is selected. Furthermore, it is conceivable that the

Increasing the life of the drive device, a protective means, such as a oil film or rubber material having guide roller, between the slide plate and the cam is arranged. In a further embodiment, it is provided that the tool slide is a folding jaw carrier. The tool slide preferably has a folding jaw carrier and a base part, wherein the folding jaw carrier is linearly movable relative to the base part. In particular, it is provided that on the folding jaw carrier a

Falzbackenantrieb is attached to effect a linear movement of the Falzbackenträgers relative to the base part or on the base part of a Falzbackenantrieb with a for

Linear movement angularly oriented drive direction to effect a

Linear movement of the Falzbackenträges is fixed relative to the base part.

Another object of the present invention is a folding machine with a

Drive device as described above. With such a folding system can be folded in an advantageous manner at very low cycle time sheets, the

Drive device for the necessary positioning accuracy when positioning the tool slide ensures.

Another object of the present invention is a method for driving a tool slide along a feed direction in a folding machine, wherein a

Rotational movement of a drive shaft by means of a cam in a linear movement of a slide plate, which is directly or indirectly connected to the tool slide, is transmitted along the feed direction.

Compared to the prior art can be dispensed with advantageously pneumatic or hydraulic cylinder here. Instead, it is conceivable that the

Drive shaft via an electric drive, preferably an electric motor, is driven for rotation. Due to the electrical drive, the movement of the component can be controlled in an uncomplicated manner. In particular, it is conceivable that the electric drive is coupled to a control circuit, with the help of which it is possible to react directly to changes in the processing process.

In a further embodiment, it is provided that for driving the

Tool slide a drive device is used as described above. Further details, features and advantages of the invention will become apparent from the

Drawings, as well as from the following description of preferred

Embodiments with reference to the drawings. The drawings illustrate only exemplary embodiments of the invention, which the essential

Do not limit the idea of the invention. Brief description of the figures

Figure 1 shows a folding system with a drive device according to a first

exemplary embodiment of the present invention.

Figure 2 shows the drive device according to the first exemplary embodiment of the present invention in a perspective view.

Figure 3 shows the drive device according to the first exemplary embodiment of the present invention in an exploded view.

Figure 4 shows a cam for a drive device according to the present invention. Embodiments of the invention

In the various figures, the same parts are always provided with the same reference numerals and are therefore usually named or mentioned only once in each case. 1 shows a folding system 100, in which a drive device 10 according to a first exemplary embodiment of the present invention is shown. Such folding systems make high demands on the drive device 10, if possible as time-saving a large number of transformations, in particular of

Folding processes, would like to realize. It is provided here that a component,

For example, a board from which a hood is to be made on one

Receiving surface 50 is placed. Preferably, there are two components to be connected by the folding and of which one of the components is already preformed. For example, it is conceivable that a first component is at least partially bent at the edge and the bent part of the first component extends at least partially perpendicular to the receiving surface. Preferably, the second component is arranged on the first component and by the folding process, the first component is further bent or crimped so that it at least partially encases the second component. For the folding process a tool slide 7 is provided, which is shown enlarged in Figure 1 and is connected directly or indirectly with a slide plate 1. In doing so, the

Tool slide 7 during the folding process, the component and folds this. With the help of

movable Schieberplattel can then be done in the folding system 100 of the folding process by the slide plate and thus also the tool slide 7 in the direction of the component is moved. In particular, it is provided that the slide plate 1 by the

Drive device 10 is driven. Preferably, the drive device 10 comprises a motor, in particular an electric motor 6, which is arranged below the plane in which the slide plate 1 is moved for the folding process.

FIG. 2 shows the drive device 10 according to a first exemplary embodiment of the present invention. The drive device 10 comprises a

Slider plate 1 and a drive shaft 5. It is provided that the slide plate 1 is used to drive a tool slide 7, as shown in Figure 1, wherein the tool slide 7 in turn cooperates positively along the feed direction A directly or indirectly with the component and thereby causes its transformation. It is conceivable that the slide plate 1 comprises an adapter on the most diverse

Tool slide 7 can be arranged depending on the component to be folded. Furthermore, it is provided that the drive shaft 5 and the slide plate 1 via a cam 4 are in operative connection. In particular, the cam disk 4 acts as a force flux means, the rotational movement of the drive shaft 5 about a rotation axis B in a

Linear movement of the slide plate 1 along the feed direction A translated. It is thus possible in an advantageous manner to design the drive device to save space, because advantageously can be dispensed with space-filling pneumatic cylinder, which would otherwise have to be arranged in the plane in which the slide movement for the folding process.

In the first exemplary embodiment, the drive shaft 5 for the translation of the rotational movement in a linear movement in a coupling region 15 rotatably connected to the cam 4, wherein the coupling region 15 eccentrically on the

Cam 4 is arranged. Furthermore, it is provided that the slide plate 1 comprises a guide block 2 and / or a further guide block 8. In particular, the guide block 2 and the further guide block 8 are arranged along a connecting line, wherein the connecting line runs essentially parallel to the feed direction A. Preferably, the guide block 2 and / or the further guide block 8 each comprise a cam roller 7, which is designed such that they roll at least piecemeal along the curve, ie along a circumference of the cam 4 in a direction perpendicular to the axis of rotation B level. Furthermore, it is provided that the cam plate 4 is arranged in at least one rotational position, the cam form-fitting manner to the guide block 2 and the other guide block 8. Then the guide block 2, the cam 4 and the other Guide block 8 in a row immediately adjacent, in particular in contact standing adjacent to each other. In such a situation, the slide plate 1 is secured by the positive connection with the guide block 2 and the other guide block 8 in position, in particular against movements opposite to

Vorhubbewegung, i. it is an undesirable displacement of the slide plate 2 and thus the tool slide 7 is prevented. Preferably, the rotational position is taken when the tool slide 7 has taken its target position. It is conceivable that the cam roller 7 is equipped with a rubber-like material as a protective means. Upon rotation of the cam 4 is - predetermined by the curve 19 - the

Guide block 2 and the other guide block 8 in one or in the opposite

Feed direction A direction is pressed. The thus moving guide block 2 and further guide block 8 and thus the sliding plate 1 are consequently moved along the feed direction A. It is further conceivable that the cam 4 is designed such that during the rotation of the drive shaft 5, the contact between the cam 4 and the

Guide block 2 and the other guide block 8 is at least temporarily solved. If the contact is released, the cam 4, the Schieberplattel and thus the

Do not drive tool slide and preferably occupies a position in which the component is not acted upon by a force. In particular, the contact is achieved when the cam 4 assumes a position in which the expansion of the cam 4 between the guide block 2 and the further guide block 8 is smaller than the distance between just this guide block 2 and the other guide block 8. Furthermore, it is provided in that the curve 19 of the cam disc 4 defines or determines a movement shape of the slide plate 1. The form of movement here is essentially described by the speed at which a forward stroke movement of the slide plate 1 takes place. The form of motion essentially determines the timing with which the deformation process, in particular the folding takes place, is codetermined. The curve 19 determines how a torque originating from the drive shaft 5 and an angular velocity are converted. Furthermore, it is envisaged that the

Drive shaft 5 by an electric drive 6, preferably an electric motor, is driven. As a result, torque and angular speed of the drive shaft 5 and consequently also the timing of the forming process, in particular the folding, can be advantageously controlled.

FIG. 3 shows the drive device 10 according to the first exemplary embodiment of the present invention in an exploded view. To protect the cam 4 The collar 20 preferably encloses the cam 4 at least partially and has an opening on the side facing the slide plate, via which the cam 4 can come into direct or indirect contact with the slide plate 1.

FIG. 4 shows a cam disk 4 for a drive device 10 according to the present invention. It is provided that the curve 19, the speed at which the slide plate 1 is moved determines. In particular, the curve 19 has circular subsegments whose radii are decisive for the speed of the slide plate 1. For example, the curve 19 has a first circular one

Sub-segment having a first radius 16 and a second circular sub-segment with a second radius 17, wherein the first radius 16 is greater than the second radius 17. If the guide block 2 just in contact with the first sub-segment, the slide plate 1 with a lesser Speed driven as if the

Guide block 2 is just in contact with the second sub-segment. Preferably, the drive shaft 5 in a corresponding recess 18 in the cam 4 can be arranged.

LIST OF REFERENCE NUMBERS

1 slide plate

2 guide blocks

3 corner scooters

4 cam

5 drive shaft

6 Electric drive

8 Another leader block

10 drive device

12 processing device

15 coupling area

16 First radius

17 Second radius

18 recess for drive shaft

19 curve course

20 collars

50 receiving surface for the component

100 manufacturing plant

A feed direction

B rotation axis

Claims

1 . Drive device (10) for driving a tool slide (7) in a folding system (100), wherein the drive device (10) comprises a slide plate (1) indirectly or directly connected to the tool slide and a drive shaft (5) rotatable about a rotation axis (B) , wherein a rotational movement of the

Drive shaft (5) by means of a cam (4) in one along the

Feed direction extending linear movement of the slide plate (1) is transferable.

2. Drive device (10) according to claim 1, wherein the drive device (10) has an electric drive (6) for the rotational movement of the drive shaft (5).

3. Drive device (10) according to one of the preceding claims, wherein the rotation axis (B) substantially perpendicular to the pre-stroke device (A).

4. Drive device (10) according to one of the preceding claims, wherein the drive shaft (5) in a coupling region (15) rotatably connected to the cam (4), wherein the coupling region (15) is arranged eccentrically on the cam (4).

5. Drive device (10) according to one of the preceding claims, wherein the slide plate (1) has a guide block (2), wherein the guide block (2) at least temporarily along the feed direction (A) form fit to

Cam (4) is arranged.

6. Drive device (10) according to one of the preceding claims, wherein the slide plate (1) has a further guide block (8), wherein the further guide block (8) at least temporarily along one of the feed direction (A) opposite direction positively to the cam (4) is arranged.

7. Drive device (10) according to one of the preceding claims, wherein the guide block (2) and / or the further guide block (8) has a cam roller (3), wherein the cam roller (3) about an axis parallel to the axis of rotation (B) extending axis is rotatable and at least temporarily with the cam (4) can be brought into contact.

8. Drive device (10) according to one of the preceding claims, wherein the guide block (2) and / or the further guide block (8) are biased such that the contact between the cam (4) and the guide block (2) and / or another guide block (8) during rotation of the cam (4) during rotation of the cam (4) remains.

9. Drive device (10) according to one of the preceding claims, wherein a curve (19) of the cam disc (4) determines the movement of the tool slide (7) along the feed direction (A).

10. Drive device (10) according to one of the preceding claims, wherein the curve (19) of the cam disc (4)

- specifies at least one fixed position of the slide plate (1) and / or,

- A first circular Teilsegement having a first radius (16) and a second circular sub-segment having a second radius (17), wherein the second radius (16) is greater than the first radius (17).

1 1. Drive device (10) according to one of the preceding claims, wherein the slide plate (1) has an adapter for a variety of different

Tool slide has.

12. Drive device (10) according to one of the preceding claims, wherein

- The slide plate (1) and / or the cam (4) are interchangeable and / or

- Between the slide plate (1) and cam (4) a protective means is arranged.

13. Drive device (10), according to one of the preceding claims, wherein the tool slide is a folding jaw carrier.

14. folding system (100) with a drive device (10) according to one of

previous claims.

15. A method for driving a tool slide (7) along a

Feed direction (A) in a folding system, wherein a rotational movement of a drive shaft (5) by means of a cam (4) in a linear movement of a slide plate (1), directly or indirectly with the tool slide (7) is connected along the feed direction (A) is transmitted.

16. The method according to claim 14, wherein a drive device (10) according to claims 1 to 12 is used.