EP3263241A1 - Rolling folding device and method for folding an edge section of a sheet metal part - Google Patents

Abstract

The invention relates to a Rollfalzvorrichtung (100) for folding an edge portion (10) of a sheet metal part (11) with a robot-guided Rollfalzkopf (14) which in the folding direction (R) along the foldable edge portion (10) of the sheet metal part (11) movable Folding roller (15), and a holding device (16) for holding the sheet metal part (11) in a defined position by means of which a pressing force directly on the edge region (10) of the sheet metal part (11) can be applied, wherein the holding device (16) first pressure roller (17), which is arranged in the folding direction (R) in front of the folding roller (15), and a second pressure roller (18) which is arranged in the folding direction (R) behind the folding roller (15).

Description

The invention relates to a Rollfalzvorrichtung for folding an edge portion of a sheet metal part. Furthermore, the invention relates to a method for folding an edge region of a sheet metal part.

Such a Rollfalzvorrichtung can be used in particular in the automotive industry in the manufacture of attachments, such as vehicle doors, tailgates, hoods, etc. In this joining method, a robot-guided Rollfalzkopf the Rollfalzvorrichtung bypasses the sheet metal part or to be joined sheet metal parts at the edge regions and creates the desired seam shape, for example by an edge portion of an outer panel is folded so that this folded edge portion surrounds the edge region of an inner panel.

From the EP 1 097 759 A1 a Rollfalzvorrichtung with a folding bed is known, in which two sheet metal parts are inserted so that their edge regions are on the edge of the folding bed in preparation for the folding process on each other. In this case, the lower sheet metal part has a bevelled in a previous Abkantvorgang about 90 ° and projecting from the folding bed web, which is placed by means of Rollfalzvorgangs on the edge region of the upper sheet metal part and then includes or encloses to produce a compound of the two sheet metal parts together. The Rollfalzvorgang is carried out by means of a robot-guided Rollfalzkopfes, on which a foldable along the edge portions movable folding roller is mounted.

A major challenge is the exact position fixation of the sheet metal part or the sheet metal parts during the folding process, since otherwise no sufficient quality of the fold can be achieved.

The invention is therefore an object of the invention to provide a folding device and a method for folding an edge portion of a sheet metal part available, by means of which in the simplest possible way an accurate position holding the sheet metal part can be ensured during folding.

The solution of the object according to the invention is achieved by the features of the independent claims. Preferred embodiments and further developments of the invention are specified in the dependent claims.

The Rollfalzvorrichtung according to the invention comprises a robot-guided Rollfalzkopf, which has a folding in the direction along the foldable edge region of the sheet metal part movable folding roller. Further, the Rollfalzvorrichtung according to the invention comprises a holding device for holding the sheet metal part in a defined position, by means of which a pressing force directly on the edge region of the sheet metal part can be applied, wherein the holding device is a first pressure roller, which is arranged in the folding direction in front of the seaming roller, and a second pressure roller, which is arranged in the folding direction behind the folding roller has.

The object of the invention is further achieved by means of a method in which a folding roller of a robot-guided Rollfalzkopfes is moved in the folding along the folded edge portion of the sheet metal part and the sheet metal part in the movement of the seaming roller in the folding direction by means of a first pinch roller, which in the folding direction before Folding roller is arranged, and a second pressure roller, which is arranged in the folding direction behind the folding roller having holding device is held in a defined position by a pressing force is applied directly to the edge region of the sheet metal part by means of the holding device.

According to the invention, it is now provided that the Rollfalzvorrichtung has a holding device which has the function to keep the sheet metal part to be folded or the sheet metal parts to be joined together via a fold during the folding operation in a defined position. When folding is preferably carried out adjusting an edge portion of a sheet metal part. The holding device is designed such that it holds the sheet metal part or the sheet metal parts directly in the region of the fold by the holding device applies a pressing force directly to the edge region of the sheet metal part to be folded. The application of the pressure force via two separately arranged pressure rollers of the holding device. In order to apply a uniform pressure force during the folding operation on the folding area and thus the edge region of the sheet metal part, the first pressure roller in the folding direction in front of the folding roller and the second pressure roller is arranged in the folding direction behind the folding roller. Thus, both before the actual folding operation by means of the folding roller and after the folding operation with the seaming roller, a pressing force can be applied to the edge region of the sheet metal part to be folded. The two pinch rollers are preferably as close as possible, positioned at a small distance to the folding roller. Preferably, the two pinch rollers do not have a separate drive, but are also rotated by the movement of the seaming roller in the folding direction along the edge region of the sheet metal part, so that the two pinch rollers are designed to follow the seaming roller. Characterized in that the holding of the sheet metal part to be folded now by applying a pressing force directly on the edge region to be folded and not next to it, on the remaining area of the sheet metal part, contamination of the pressure rollers can be avoided by exiting at the rebate adhesive residue. By means of the addition to the folding roller provided, two pressure rollers having holding device can thus in the simplest possible way a precise position holding the sheet metal or pieces can be ensured during folding.

The holding device is preferably mounted on the robot-guided Rollfalzkopf. Thus, a particularly dense positioning of the pressure rollers can be achieved at the positioned on the Rollfalzkopf folding roller. Furthermore, the mounting of the holding device on the Rollfalzkopf allows a particularly compact design of the Rollfalzvorrichtung. Elaborate constructions for the holding device can be avoided. For example, the holding device can be detachably fastened to the roller-folding head via a screw connection. The holding device is preferably separated into two parts, wherein a first part of the first pressure roller and a second part comprises the second pressure roller, wherein the two parts of the holding device and thus the two pressure rollers of the holding device are then preferably mounted on two opposite side surfaces of the Rollfalzkopfes can.

In order to be able to vary the pressing force to be applied to the edge region and to be able to compensate for unevenness, it may be preferable for the first pressure roller and / or the second pressure roller to be resiliently mounted. The pressure force can be applied by means of a linear guide and a gas spring. This has the advantage that the pressure rollers, with fluctuating trimming, can always press with the same force. Alternatively, an air cylinder may be provided to vary the applied to the edge region pressure force and be able to compensate for unevenness.

Preferably, the first pressure roller and / or the second pressure roller are tiltable relative to its axis of rotation. Due to the possibility of a tilting movement of the pressure rollers they can optimally in the guide along the edge region of the sheet metal part to the contour adjust the edge region, so that regardless of the contour of the edge region, the application of a pressure force can be safely ensured.

The first pressure roller is preferably held on a first receiving element by means of a first shaft element extending along the axis of rotation of the first pressure roller, wherein the first axle element is preferably mounted on the first receiving element in front of and behind the first pressure roller. The first receiving element thus preferably surrounds the first pressure roller in a U-shaped manner. Due to the mounting of the first axle element, on which the first pressure roller is rotatably mounted, at two positions right and left of the first pressure roller, a particularly precise guidance of the first pressure roller via the first receiving element and via the first axle element. The first pinch roller is thus preferably mounted on both sides or on both sides in this embodiment. The first pressure roller can be stored very stable, so that unwanted tilting movements of the first pressure roller, which can occur for example in a one-sided storage, can be avoided. The first receiving element is preferably attached directly to the Rollfalzkopf.

Also, the second pressure roller is preferably held by means of a second axis member extending along the axis of rotation of the second pressure roller on a first receiving element, wherein the second axle member is preferably mounted in front of and behind the second pressure roller on the second receiving element. The second receiving element thus preferably surrounds the second pressure roller in a U-shaped manner. Due to the mounting of the second axis element, on which the second pressure roller is rotatably mounted, at two positions on the right and left of the second pressure roller, a particularly exact guidance of the second pressure roller can be effected via the second receiving element and via the second axis element. The second pinch roller is thus preferably mounted on both sides or on both sides in this embodiment. The second pressure roller can be stored very stable, so that unwanted tilting movements of the second pressure roller, which can occur, for example, in a one-sided storage, can be avoided. The second receiving element is preferably attached directly to the Rollfalzkopf.

Furthermore, it can preferably be provided that the second pressure roller can be positioned at an angle 5 ° ≦ α ≦ 60 ° inclined relative to the first pressure roller. Due to the inclined arrangement of the two pressure rollers to each other, the force application of the first pressure roller on the edge region to be folded differently or in a different direction than the force application of the second pressure roller on the edge region to be folded. The effect and thus the Quality of holding the sheet metal part to be folded on the pressure rollers of the holding device can be improved.

The first pressure roller and / or the second pressure roller can also be formed profiled. A profiling can be formed for example by a radius profiling. As a result, the edge area to be folded can be better held. Other types of profiling are also possible. Furthermore, the first pressure roller and / or the second pressure roller can also be cylindrical.

In addition, the first pressure roller and / or the second pressure roller may be in the form of a respective hyperboloid. A hyperboloidal shape here means that the pressure rollers each have a cylindrical shape which has a constriction in the center over the entire circumference. In this way, a kind of positive guidance for the edge region to be folded can be formed, so that it can not escape by an excessive pressure force against the folding direction.

Further, measures improving the invention will be described below with reference to the description of preferred embodiments of the invention with reference to the following figures.

Fig. 1

eine schematische Darstellung einer Rollfalzvorrichtung gemäß der Erfindung beim Falzen eines Kantenbereichs eines Blechteils; und

Fig. 2

eine schematische Darstellung der Position der Andruckrollen und der Falzrolle der in Fig. 1 gezeigten Rollfalzvorrichtung zueinander.

Show it:

Fig. 1

a schematic representation of a Rollfalzvorrichtung according to the invention in folding an edge portion of a sheet metal part; and

Fig. 2

a schematic representation of the position of the pressure rollers and the seaming roller of Fig. 1 Shown Rollfalzvorrichtung each other.

In Fig. 1 is a Rollfalzvorrichtung 100 shown schematically, by means of which an edge portion 10 of a sheet metal part 11 can be folded. The sheet-metal part 11 may have an inner panel 12 and an outer panel 13, which can be connected to one another by folding the edge area 10, which in the embodiment shown here is part of the outer panel 13.

The roll-folding device 100 has a robot-guided roll-folding head 14, on which a folding roller 15 is arranged, by means of which the folding of the edge region 10 of the sheet-metal part 11 he follows. For this purpose, the folding roller 15 is moved by means of the Rollfalzkopfes 14 in the folding direction R on the edge portion 10 of the sheet metal part 11.

Further, the Rollfalzvorrichtung 100 has a holding device 16, which serves to hold the sheet metal part 11 during folding in a defined position, in particular to hold to prevent the sheet metal part 11 can slip during the folding process. For this purpose, the holding device 16 is designed such that it can apply a pressing force directly to the edge region 10 of the sheet metal part 11 to be folded.

The holding device 16 is divided into two parts, so that a pressure force can be applied to the edge region 10 of the sheet-metal part 11 to be folded at two different positions arranged separately from one another. The holding device 16 is divided into two parts such that a holding force in the folding direction R can be applied in front of and behind the folding roller 15 on the edge region 10 of the sheet metal part 11 to be folded.

For this purpose, the holding device 16 has a first pressure roller 17 and a second pressure roller 18. The first pressure roller 17 is arranged in the folding direction R in front of the folding roller 15 and the second pressure roller 18 is arranged in the folding direction R behind the folding roller 15. The seaming roller 15 is thus positioned between the two pressure rollers 17, 18. The pressure rollers 17, 18 are each positioned as close as possible to the folding roller 15 and thus with a small distance to the folding roller 15.

The pressure rollers 17, 18 do not have their own drive, but they rotate about their axis of rotation A ₁ , A ₂ by a movement of the Rollfalzkopfes 14 and thus the folding roller 15 along the foldable edge portion 10 of the sheet metal part 11, so that the pressure rollers 17, 18 follow the movement of the folding roller 15.

The holding device 16 and thus the two pinch rollers 17, 18 are mounted on the robot-guided Rollfalzkopf 14 and thus secured thereto, so that the holding device 16 and the pinch rollers 17, 18 need no separate guide or recording device separately to the Rollfalzkopf 14.

The pinch rollers 17, 18 are each mounted or attached to the Rollfalzkopf 14 via a receiving element 19, 20.

In this case, the first pressure roller 17 is held on the first receiving element 19 by means of a first shaft element 21 extending along the axis of rotation A _{1 of} the first pressure roller 17. The first axle element 21 is mounted on the first receiving element 19 in front of and behind the first pressure roller 17. The first pinch roller 17 is thus mounted on both sides or two sides. The first receiving element 19 engages around the first pressure roller 17 U-shaped.

The second pressure roller 18 is held on the second receiving element 20 by means of a second shaft element 22 extending along the axis of rotation A _{2 of} the second pressure roller 18. The second axle element 22 is mounted on the second receiving element 20 in front of and behind the second pressure roller 18. The second pinch roller 18 is thus also mounted on both sides or on two sides. The second receiving element 20 engages around the second pressure roller 18 U-shaped.

In order to achieve a resilient mounting of the pressure rollers 17, 19 are on the receiving elements 19, 20 each have a gas spring 24, 25 and each right and left of the gas spring 24, 25 arranged fitting screws 26, 27, 28, 29, each with a plain bearing guide intended.

Attached are both the first receiving element 19 and the second receiving element 20 by means of a screw connection to the Rollfalzkopf 14, in particular a flange 23 of the Rollfalzkopfes 14, on which the folding roller 15 is rotatably mounted.

The first pressure roller 17 and the second pressure roller 18 are each spring-mounted.

Further, the first pinch roller 17 and the second pinch roller 18 are supported so that they can be tilted together with their shaft members 21, 22 relative to their axis of rotation A ₁ , A ₂ by applying a force to the shaft members 21, 22, such as in Fig. 2 indicated by the arrows.

Like both in Fig. 1 as well as in Fig. 2 can be seen, the two pinch rollers 17, 18 may be arranged inclined to each other by the second pinch roller 18, in particular the axis of rotation A _{2 of} the second pinch roller 18 and the second axle member 22, on which the second pinch roller 18 is mounted, at an angle 5 ° ≤ α ≤ 60 ° inclined to the first pinch roller 17, in particular the axis of rotation A _{1 of} the first pinch roller 17 and the first axis element 21, on which the first pinch roller 17 is mounted, are positioned can. The angle α is preferably arbitrarily adjustable and / or may vary depending on the contour of the edge region 10 of the sheet metal part 11 to be folded.

At the in Fig. 1 and 2 shown embodiment, not only the pinch rollers 17, 18 are inclined to each other, but also the folding roller 15 is inclined to the two pinch rollers 17, 18 are arranged. The axis of rotation A _{3 of} the folding roller 15 is at an angle 10 ° ≤ β ₁ ≤ 90 ° to the axis of rotation A2 of the second pinch roller 18 and at an angle 10 ° ≤ β ₂ ≤ 90 ° to the axis of rotation A _{1 of} the first pinch roller 17 is positioned , In the embodiment shown here, the angle β _{2 is} greater than the angle β ₁ , so that the inclination of the second pressure roller 18 to the folding roller 15 is greater than the inclination of the first pressure roller 17 to the folding roller 15th

The first pressure roller 17 and / or the second pressure roller 18 each have a running surface with which the pressure rollers 17, 18 roll on the edge region 10. These running surfaces of the pressure rollers 17, 18 may be formed profiled.

As in particular in Fig. 2 can be seen, the pressure rollers 17, 18 each have the shape of a hyperboloid, in which the pressure rollers 17, 18 are cylindrical, formed with a centrally formed constriction.

The invention is not limited in its execution to the above-mentioned preferred embodiments. Rather, a number of variants is conceivable, which makes use of the solutions shown even in fundamentally different versions. All features and / or advantages resulting from the claims of the description or the drawings, including structural details of spatial arrangements and method steps, can be essential to the invention, both individually and in the most diverse combinations.

LIST OF REFERENCE NUMBERS

100

Rollfalzvorrichtung

10

edge region

11

sheet metal part

12

inner panel

13

outer panel

14

The roller folding

15

seaming roll

16

holder

17

First pinch roller

18

Second pinch roller

19

First receiving element

20

Second receiving element

21

First axle

22

Second axle

23

flange

24

Gas spring

25

Gas spring

26

Bolt with plain bearing guide

27

Bolt with plain bearing guide

28

Bolt with plain bearing guide

29

Bolt with plain bearing guide

R

folding direction

A ₁

First axis of rotation

A2

Second axis of rotation

α

tilt angle

β ₁

tilt angle

β ₂

tilt angle

Claims (10)

A roller-folding device (100) for folding an edge region (10) of a sheet-metal part (11) with a robot-guided roller-folding head (14), which has a folding roller (15) which can be moved in the folding direction (R) along the edge region (10) of the sheet-metal part (11) to be folded. and a holding device (16) for holding the sheet metal part (11) in a defined position, by means of which a pressure force can be applied directly to the edge region (10) of the sheet metal part (11),
wherein the holding device (16) has a first pressure roller (17), which is arranged in the folding direction (R) in front of the folding roller (15), and a second pressure roller (18), which is arranged in the folding direction (R) behind the folding roller (15) , having. Rollfalzvorrichtung (100) according to claim 1, characterized in that the holding device (16) on the robot-guided Rollfalzkopf (14) is mounted. Rollfalzvorrichtung (100) according to claim 1 or 2, characterized in that the first pressure roller (17) and / or the second pressure roller (18) are resiliently mounted. Rollfalzvorrichtung (100) according to any one of claims 1 to 3, characterized in that the first pressure roller (17) and / or the second pressure roller (18) relative to its axis of rotation (A ₁ , A ₂ ) are tilted. Rollfalzvorrichtung (100) according to one of claims 1 to 4, characterized in that the first pressure roller (17) by means of a along the axis of rotation (A ₁ ) of the first pressure roller (17) extending first axle member (21) on a first receiving element (19 ), wherein the first axle element (21) is mounted in front of and behind the first pressure roller (17) on the first receiving element (19). Rollfalzvorrichtung (100) according to any one of claims 1 to 5, characterized in that the second pressure roller (18) by means of a along the axis of rotation (A ₂ ) of the second pressure roller (18) extending second axle member (22) on a second receiving element (20 ), wherein the second axle element (22) is mounted in front of and behind the second pressure roller (18) on the second receiving element (20). Rollfalzvorrichtung (100) according to any one of claims 1 to 6, characterized in that the second pressure roller (18) at an angle 5 ° ≤ α ≤ 60 ° inclined to the first pressure roller (17) is positionable. Rollfalzvorrichtung (100) according to one of claims 1 to 7, characterized in that the first pressure roller (17) and / or the second pressure roller (18) are formed profiled. Rollfalzvorrichtung (100) according to any one of claims 1 to 8, characterized in that the first pressure roller (17) and / or the second pressure roller (18) are each in the form of a hyperboloid. A method for folding an edge region (10) of a sheet-metal part (11), in which a folding roller (15) of a robot-guided Rollfalzkopfes (14) in the folding direction (R) along the foldable edge region (10) of the sheet metal part (11) is moved and the sheet metal part (11) during the movement of the folding roller (15) in the folding direction (R) by means of a first pressure roller (17) which is arranged in the folding direction (R) in front of the folding roller (15), and a second pressure roller (18), which in Folding direction (R) behind the folding roller (15) is arranged holding fixture (16) is held in a defined position by means of the holding device (16) a pressing force directly on the edge region (10) of the sheet metal part (11) is applied.

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