EP1212157B1 - Flanging device for pre-flanging and flanging of components - Google Patents

Description

The invention relates to a flanging device according to the preamble of claims 1 and 2.

The term "flanging" is understood to mean the positive connection of two parts by folding over a flange. In the body shop, an outer and an inner panel in particular are thereby connected to one another.

• 1. Bördelwerkzeuge, die in Pressen verwendet werden und durch eine vertikale Bewegung des Werkzeugoberteils zum Unterteil den Flansch vor- bzw. fertigbördeln. Aus der DE 44 18 684 A1 ist ein derartiges Bördelverfahren bekannt, wobei zur Vorbördelung ein Schieber radial nach innen und anschließend wieder radial nach außen fährt und zur Fertigbördelung ein zweites Bördelwerkzeug mit Hilfe des Pressenstempels vertikal verfahren wird. Durch die Anordnung der Presse oberhalb des Falzbettes sind besondere Aufwendungen für die Zu- und Abfuhr der Bauteile vorzusehen. Vor allem muß hierbei das obere Werkzeug einen großen Hub ausführen.
• 2. Bördelvorrichtungen, bei denen das Bördelbett feststeht und der Bördelflansch durch hydraulisch oder elektrisch betätigte Schieber oder mechanische Kipphebelelemente umgebogen wird. Hierbei ist die Betätigung und Ansteuerung der Bördelschieber bzw. der Kipphebelelement aufwendig (vgl. DE 197 47 292 C1).
• 3. Aus der US-A 5150508 ist eine gattungsgemäße Bördelvorrichtung bekannt wobei das untere Falzbett, auf das die zu verbindenden Bleche aufgelegt werden, für das Vor- und Fertigbördeln jeweils einen eigenen

The following systems are available for flanging body parts:

• 1. Flanging tools used in presses and flanging the flange in or out by moving the upper part of the tool vertically towards the lower part. Such a flanging method is known from DE 44 18 684 A1, a slider moving radially inwards and then radially outwards again for pre-flanging and a second flanging tool being moved vertically with the help of the press ram for finished flanging. The arrangement of the press above the folding bed means that there are special expenses for the supply and removal of the components. Above all, the upper tool must perform a large stroke.
• 2. Flanging devices in which the flanging bed is fixed and the flanging flange is bent over by hydraulically or electrically operated slides or mechanical rocker arm elements. Here, the actuation and control of the flanging slide or the rocker arm element is complex (cf. DE 197 47 292 C1).
• 3. From US-A 5150508 a generic flanging device is known, the lower folding bed, on which the sheets to be connected are placed, each having its own for pre-flanging and finished flanging

Flaring stroke and presses the flange to be folded one after the other against the fixed pre- and finished folding jaws. The pre- and finished folding jaws are arranged one above the other on a horizontally movable slide. For pre-folding and finishing folding, the folding bed must be moved vertically and the folding jaws horizontally. The folding bed must then have a long adjustment path between the pre-folding and finishing folds and in the respective positions the actual flanging stroke.

The invention has for its object to propose a generic device in which the vertical movement of the folding bed is limited to a minimum and the pre and finished folding jaws are brought into position with safe and simple movements.

To solve this problem, it is proposed that the pre-folding jaw can also be displaced from the outside inwards into the pre-flanging position with the aid of a slide and relative to the slide of the finished folding jaw.

As an alternative to the displaceability of the pre-folding jaw, it is proposed according to the invention that the pre-folding jaw is fastened to a swivel flap and can be pivoted from the outside inwards into the pre-flanging position by actuating the swivel flap and that the swivel flap can be locked in the pre-flanging position with the pre-folding jaws attached.

In the subclaims 3 to 10 meaningful embodiments are given.

The fact that according to the invention the folding jaws for pre-folding and finishing folding can each be moved as independently as possible into the flanging position above the folding bed on their own slides, the travel path of the folding bed can be considerably reduced. In particular when the guideways of the two slides are assigned to one another at an acute angle, the pre-folding jaws and finished folding jaws can be brought into the same flanging position one after the other, so that a large adjustment movement of the folding bed between the pre-folding and finishing folds is not necessary. The folding bed therefore only executes the actual flanging stroke for the pre-folding and finishing folding, and this flanging stroke takes place at one and the same point. The same is also possible in the alternative embodiment, the combination of the pivotable pre-folding jaw with the displaceable finished folding jaw.

It has proven to be advantageous to arrange the slide for pre-folding or the swivel flap on the slide for finished folding or vice versa. In this so-called piggyback arrangement or slide on slide arrangement, the displacement paths for the individual slide are limited to a minimum. A particularly space-saving construction is also possible. A spring-operated hold-down device can be arranged on the upper slide, preferably the slide for pre-folding or on the swivel flap, which holds the two sheets on the surface of the folding bed before the pre-folding and finished folding process begins.

In the alternative embodiment according to the invention, it has proven to be advantageous to articulate the drives for the slide with the finished folding jaw and the pivoting flap on a common console, the console itself being firmly connected to the base frame. In addition, the swivel flap can be rotatably mounted on a further bracket via a further swivel joint, which is also firmly connected to the base frame or to the slide.

The swivel flap can be locked in the working position in that a locking unit is arranged on the slide for the finished folding, which is brought into the locking position by moving this slide with the existing drive unit. The swing flap and slide can also be coupled to one another in such a way that the forward and finished folding beams can be moved one after the other into the working position with a common drive unit. It has proven to be advantageous to arrange stops on the swivel flap and on the slide, which are brought into contact for locking the pre-folding jaws. For the subsequent finishing folding, the swivel flap can then be swiveled up via a slide guide provided on the slide. Only one drive unit is required for linear movement of the slide, since the pivoting flap is forcibly actuated at the same time as the slide moves.

Fig. 1

in der Seitenansicht ausschnittsweise die Schieber auf Schieber Anordnung

Fig. 2

eine Schnittdarstellung zur Fig. 1 in der sogenannten Null-Stellung

Fig. 3

eine entsprechende Schnittdarstellung in der Vorfalzstellung

Fig. 4

eine Schnittdarstellung in der Fertigfalzstellung

Fig. 5

in der Seitenansicht ausschnittsweise die Kombination Schwenkklappe mit Schieber in der Vorfalzstellung

Fig. 6

zu Figur 5 die zurückgeschwenkte Position der Schwenkklappe

Fig. 7

eine Ausführungsform für die Betätigung von Schwenkklappe und Schieber mit einer Antriebseinheit.

The invention is explained in more detail, for example, with the aid of the attached FIGS. Show it

Fig. 1

in the side view sections of the slide on slide arrangement

Fig. 2

a sectional view of FIG. 1 in the so-called zero position

Fig. 3

a corresponding sectional view in the pre-fold position

Fig. 4

a sectional view in the finished folding position

Fig. 5

in a side view, sections of the combination of the swivel flap and slide in the pre-folding position

Fig. 6

5 shows the pivoted back position of the pivoting flap

Fig. 7

an embodiment for the actuation of swivel flap and slide with a drive unit.

The figures show the outer edge of a folded bed 4 with the outer edges of the body panels 5 and 6 lying thereon. For flanging, e.g. a car door, a folding bed 4 is arranged under the entire door. With the flaring stroke, the folding bed 4 with the sheets 5, 6 lying thereon is lifted and for the 2-stage bending of the upstanding flange 7 up to the flat edge area 8 one after the other against the oblique engagement surface 14 of the pre-folding jaw 9 and against the horizontal engagement surface 15 of the finished folding jaw 10 pressed. As can be seen from FIG. 1, the lower slide 2 can be moved on a base frame 1 on horizontal guideways 19 for the purpose of folding. The drive 12 for the slide 2 is supported on the frame 1 by the fastening 11. On the side facing the folding bed 4, the finished folding jaw 10 is e.g. releasably attached by a screw connection. The upper slide 3 can be moved on the slide 2 for pre-folding on the guideways 20 in the direction of the double arrow shown. The guideways 20 are arranged at an acute angle, preferably at an angle of 25 ° to the guideways 19. The drive 13 for the slide 3 is supported by the attachment 16 on the slide 2. The pre-folding jaw 9 is preferably releasably attached to the slide 3.

In the zero position shown in FIG. 2, the upper slide 3 with the pre-folding jaw 9 and the lower slide 2 with the finished folding jaw 10 are in the retracted position. The folding bed 4 with the components 5 and 6 is lowered into the lower end position. The hold-down device 17 fastened to the upper slide 3 is held in the extended lower position by the spring 18 or in some other way.

3, the slide 2 with the finished folding jaw 10 are in the zero position. The slider 3 with the pre-folding jaw 9 moves by approximately 50-60 mm at an angle of 25 ° to the horizontal and can be locked via the toggle lever (not shown) or in some other way. The hold-down device 17 is in the extended position by spring force. The folding bed 4 moves upwards in the flanging stroke, the sheet 6 being fixed in position by the holding-down device 17 by means of spring force. During the flanging stroke, the flange 7 is brought into an approximately 45 ° position by the oblique engagement surface 14 of the pre-folding jaw 9. After completion of the pre-folding process, the folding bed 4 moves downwards by the flanging stroke and the slider 3 returns to the zero position.

4, the slide 3 with the pre-folding jaw 9 is in the zero position. The slide 2 with the finished jaw 10 moves to the stop. The hold-down device 17 is in the extended position by spring force. The folding bed 4 moves upwards by the flanging stroke, the sheet 6 being fixed in position by the hold-down device 17 via the spring force. After the folding process has been completed, the folding bed 4 moves downwards by the flanging stroke and the slides 2 and 3 return to the zero position.

The flanging device according to the invention enables a substantial reduction in the vertical movements of the folding bed 4. This is done in that the pre-folding jaws and the finished folding jaws are brought into the same folding position via a hydraulic, pneumatic or electrical drive.

In the illustrations in FIGS. 5 and 6, the pre-folding jaw 21 is firmly connected to the swivel flap 24. The swivel flap 24 is on the one hand rotatably mounted on the bracket 28 via the joint 26 and on the other hand is pivoted by means of the drive 22. The drive 22 is connected via the joint 25 to the swivel flap 24 and via a further joint to the bracket 23 fixedly attached to the base frame 1. In the pre-folding position according to FIG. 5, the swivel flap 24 is secured with the aid of the lock 29. The lock 29 arranged on the slide 2 is moved back and forth together with the slide 2 by actuating the drive 12. According to FIG. 6, the console 28 is firmly connected to the base frame 1. In order to enable a relative movement between slide 2 and bracket 28, slide 2 is provided with an elongated hole in the area of joint 26.

In the embodiment according to FIG. 7, in contrast to the embodiment according to FIGS. 5 and 6, instead of the two drive units 12 and 22, only one drive unit 30 is provided which moves the slide 2 linearly back and forth. To lock the pre-folding jaw 21 in the pre-folding position shown, a lower stop 32 is attached to the slide 2 and an upper stop 33 to the swivel flap 24. If, after completion of the pre-folding, the slide 2 is moved to the left in the illustration with the aid of the drive unit 30, the link guide 31 which is fixedly arranged on the slide 2 is also moved at the same time and the pivoting flap 24 fastened to the console 28 is moved with the roller 34 in the position Link guide 31 moves so that the pre-folding jaw 21 is pivoted up.

• 1. Übergabe der Bauteile 5, 6 auf das Falzbett 4
• 2. Oberer Schieber 3 mit Vorfalzbacken 9 fährt vor in die Falzposition
• 3. Falzbett 4 mit aufliegenden Bauteilen 5, 6 fährt hoch gegen die Vorfalzbacken 9 (Vorfalzen).
• 4. Falzbett 4 mit vorgefalztem Flansch 7 fährt in unterste Position
• 5. Oberer Schieber 3 fährt zurück
• 6. Unterer Schieber 2 mit Fertigfalzbacken 10 fährt vor in die Falzposition
• 7. Falzbett 4 mit aufliegenden Bauteilen 5, 6 fährt hoch gegen die Fertigfalzbacken 10 (Fertigfalzen)
• 8. Falzbett 4 mit fertig gefalztem Bauteil fährt in unterste Position
• 9. Unterer Schieber 2 fährt zurück
• 10. Fertig gefalztes Bauteil wir entnommen.

Essentially, the following sequence occurs with the "slide on slide" system:

• 1. Transfer of the components 5, 6 to the folding bed 4
• 2. Upper slide 3 with pre-folding jaws 9 moves into the folding position
• 3. Folding bed 4 with overlying components 5, 6 moves up against the pre-folding jaws 9 (pre-folding).
• 4. Folding bed 4 with pre-folded flange 7 moves to the lowest position
• 5. Upper slide 3 moves back
• 6. Lower slide 2 with finished folding jaws 10 moves into the folding position
• 7. Folding bed 4 with components 5, 6 resting on it moves up against the finished folding jaws 10 (finished folding)
• 8. Folding bed 4 with the finished folded component moves to the lowest position
• 9. Lower slide 2 moves back
• 10. The finished folded component is removed.

• 1. Übergabe der Bauteile 5, 6 auf das Falzbett 4
• 2. Einschwenken der Vorfalzbacken 21 in die Vorfalzposition
• 3. Vorfahren des Schiebers 2 zur Verriegelung 29 der Vorfalzbacken 21 (vgl. Figur 5)
• 4. Falzbett 4 mit aufliegenden Bauteilen 5, 6 fährt hoch gegen die Vorfalzbacken 21 (Vorfalzen)
• 5. Falzbett 4 mit vorgefalztem Flansch 7 fährt in unterste Position
• 6. Zurückfahren des Schiebers 2 zur Entriegelung der Vorfalzbacken 21
• 7. Zurückschwenken der Schwenkklappe 24 in die Position nach Figur 6
• 8. Schieber 2 mit den Fertigfalzbacken 10 fährt vor in die Fertigfalzposition
• 9. Falzbett 4 mit aufliegendem Bauteil fährt hoch gegen die Fertigfalzbacken 10 (Fertigfalzen)
• 10. Falzbett 4 mit fertig gefalztem Bauteil fährt in die unterste Position
• 11. Schieber 2 fährt zurück
• 12. Fertig gefalztes Bauteil wird entnommen

With the "swing flap and slide" system, the following main sequence results:

• 1. Transfer of the components 5, 6 to the folding bed 4
• 2. Swiveling the pre-folding jaws 21 into the pre-folding position
• 3. Advance of the slide 2 for locking 29 of the pre-folding jaws 21 (see FIG. 5)
• 4. folding bed 4 with components 5, 6 lying on it moves up against the pre-folding jaws 21 (pre-folding)
• 5. Folding bed 4 with pre-folded flange 7 moves to the lowest position
• 6.Return the slide 2 to unlock the pre-folding jaws 21
• 7. Swiveling the swivel flap 24 back into the position according to FIG. 6
• 8. Slider 2 with the finished folding jaws 10 moves into the finished folding position
• 9. Folding bed 4 with the component lying there moves up against the finished folding jaws 10 (finished folding)
• 10. Folding bed 4 with the finished folded component moves to the lowest position
• 11. Slider 2 moves back
• 12. The finished folded component is removed

• 1. Schieber 2 steht in Zwischenstellung, Schwenkklappe 24 ist hochgeschwenkt
• 2. Bauteilübergabe auf das Falzbett 4
• 3. Schieber 2 mit Kulissenführung 31 fährt zurück, Vorfalzbacken 21 wird nach unten eingeschwenkt, automatische Verriegelung durch die Anschläge 32 und 33 (vgl. Figur 7)
• 4. Falzbett 4 mit aufliegenden Bauteilen 5, 6 fährt zum Vorfalzen hoch gegen die Vorfalzbacken 21
• 5. Falzbett 4 mit vorgefalzten Bauteilen fährt in die unterste Position
• 6. Vorfahren des Schiebers 2 bis der Fertigfalzbacken 10 in Fertigfalzposition ist, gleichzeitig Hochschwenken des Vorfalzbackens 21
• 7. Falzbett 4 mit aufliegendem vorgefalzten Bauteil fährt zum Fertigfalzen hoch gegen die Fertigfalzbacken 10
• 8. Falzbett 4 mit fertig gefalztem Bauteil fährt in unterste Position
• 9. Schieber 2 fährt zurück in Zwischenstellung
• 10. Fertig gefalztes Bauteil wird entnommen.

The following sequence results for the system according to FIG. 7:

• 1. Slider 2 is in the intermediate position, swivel flap 24 is swung up
• 2. Part transfer to the folding bed 4
• 3. Slider 2 with link guide 31 moves back, pre-folding jaw 21 is pivoted downward, automatic locking by stops 32 and 33 (see FIG. 7)
• 4. Folding bed 4 with components 5, 6 resting on it moves up against the pre-folding jaws 21 for pre-folding
• 5. Folding bed 4 with pre-folded components moves to the lowest position
• 6. Advance the slide 2 until the finished folding jaw 10 is in the finished folding position, at the same time swiveling up the preliminary folding jaw 21
• 7. Folding bed 4 with the pre-folded component lying on it moves up to the finished folding jaws 10 for the finished folding
• 8. Folding bed 4 with the finished folded component moves to the lowest position
• 9. Slider 2 moves back to the intermediate position
• 10. The finished folded component is removed.

LIST OF REFERENCE NUMBERS

1

base frame

2

lower slider (for finishing folding)

3

upper slider (for folding)

4

folding bed

5

lower component, body panel

6

upper component, body panel

7

raised flange of 5

8th

flat edge area of 6 (horizontal)

9

prefolding

10

Fertigfalzbacken

11

Attachment for 12 on 1

12

Drive for 2

13

Drive for 3

14

Attack surface at 9 (oblique)

15

Attack area at 10 (horizontal)

16

Attachment for 13 on 2

17

down device

18

feather

19

horizontal guideway from 2

20

sloping guideway from 3

21

prefolding

22

Drive for 21

23

Console for 12 and 22 on 1

24

swiveling flap

25

Joint between 22 and 24

26

Joint between 24 and 28

27

Elongated hole in 2 for 26

28

Console to 1

29

Locking on 2 for 21

30

common drive unit for 2 and 24

31

Scenic tours (fixed on 2)

32

Bottom stop (fixed to 2)

33

Top stop (fixed to 24)

34

Role on 24

Claims (10)

1. Hemming device for the prehemming and finishing hemming of said components (5,6), especially body sheets, comprising
   a said first component (5) with a said flange (7) standing upright before hemming, and
   a said second component (6) with a said flat edge area (8),
   said hemming device being comprised of

   a) a said folding bed (4) performing the hemming stroke with support surfaces for the said components (5,6), which are approached at least in the said edge area (8),

   b) at least one said prefolding jaw (9,21) which can be moved into a prehemming position, with a said obliquely arranged contact surface (14) for the said flange (7),

   c) at least one said finishing folding jaw (10) which can be moved with a said slide (2) from the outside to the inside into the finishing hemming position, with said contact surfaces (15) arranged in parallel to the said edge area (8),

   characterized in that the said prefolding jaw (9) is likewise displaceable from the outside to the inside into the prehemming position by means of a said slide (3) and relative to the said slide (2) of the said finishing folding jaw (10).
2. Hemming device for the prehemming and finishing hemming of said components (5,6), especially body sheets, comprising
   a said first component (5) with a said flange (7) standing upright before hemming, and
   a said second component (6) with a said flat edge area (8),
   said hemming device being comprised of

   a) a said folding bed (4) performing the hemming stroke, with contact surfaces for the said components (5,6) approached at least in the said edge area (8),

   b) at least one said prefolding jaw (9,21) movable into a prehemming position with a said obliquely arranged contact surface (14) for the said flange (7),

   c) at least one said finishing jaw (10) movable with a said slide (2) from the outside to the inside into the finishing hemming position, with said contact surfaces (15) arranged in parallel to the said edge area (8) for the said flange (7),

   characterized in that the said prefolding jaw (21), fastened to a said pivoting plate (24), can be pivoted from the outside to the inside into the prehemming position and can be locked in the prehemming position.
3. Hemming device in accordance with claim 1, characterized in that the said slides (2,3) are displaceable on said guide paths (19,20) extending at an acute angle in relation to one another.
4. Hemming device in accordance with claim 1 or 2, characterized in that the said contact surfaces (14,15) of the said prefolding and finishing folding jaws (9,10,21) can be moved one after another into the hemming positions by means of the said slides (2,3) or by means of the said slide (2) and the said pivoting plate (24), and that the said folding bed (4) performs the same or essentially the same hemming stroke for the prehemming and the finishing hemming.
5. Hemming device in accordance with one of the claims 1 through 4, characterized in that the said slide (3) for prefolding or the said pivoting plate (24) is arranged on the said slide (2) for prefolding or vice versa.
6. Hemming device in accordance with one of the claims 1 through 5, characterized in that a said spring-actuated holding-down device (17) is arranged on the said upper slide (3) or the said pivoting plate (24).
7. Hemming device in accordance with claim 2, characterized in that the said drives (12, 22) for the said slide (2) and the said pivoting plate (24) are mounted on a said bracket (23) in an articulated manner.
8. Hemming device in accordance with claim 2, characterized in that the said pivoting plate (24) is mounted in a rotatingly movable manner on a said bracket (28) rigidly connected to the said base (1) or to the said slide (2) by means of a said hinge (26).
9. Hemming device in accordance with claim 8, characterized in that the said pivoting plate (24) and the said slide (2) are coupled with one another such that the said prefolding and finishing folding jaws (10, 21) can be moved one after another into the prehemming and finishing hemming position by means of a said common drive unit (30).
10. Hemming device in accordance with claim 8, characterized in that a said stop (33) on the said pivoting plate (24) and a said stop (32) on the said slide (2) touch each other for locking the said prefolding jaws (21) and that the said pivoting plate (24) is pivoted up with the said prefolding jaw (21) around the said hinge (26) by displacing the said slide (2) into the finishing folding position by means of a said connecting link guide (31) present at the said slide (2).