EP1510268A1 - Apparatus for prehemming and final hemming - Google Patents

Abstract

The folding tools (5, 6) can be moved in straight lines in the horizontal and vertical directions relative to the machine bench (7) using a horizontally movable sleigh (10) and a vertically movable sleigh (11). A clamping device and/or a counter-bearing (4) for the workpiece are mounted on the machine bench and the tools are used to press the workpiece against the counter-bearing.

Description

State of the art

The invention relates to a device for pre- and Fertigfalzen of sheets, in particular motor vehicle body parts, according to the preamble of the main claim.

Such devices for pre-and Fertigfalzen are in variously known. In a known device of generic type (DE 19747292), in which an inner panel at least in the edge area lies on an outer panel and the Outer sheet has an upstanding flange at the edge, are the Tools for pre-and Fertigfalzen on a common Pivoting device arranged, with a rocker, to whose End, arranged the prefolding tool and the Fertigfalzwerkzeug are and at the other end an actuator is articulated, wherein in the folding position, the sheets against the stationary tools are pressed. In this device is a swingarm over a front lever and a rear one Levers whose lever bearing distances are different, according to Art a four-bar linkage, hinged on a pedestal, so that the tools through a combined pan and Offset movement one after the other into the same working position for the or Fertigfalzen be brought. The disadvantage of this device consists mainly in that the rocker for the Folding operation performs a motion that the tool opposite the workpiece can make a curved path, which makes a controlled folding difficult. The for the pre-and Fertigfalzen required stroke, especially in the vertical direction, is caused here by a pivoting movement, the one Minimum space for their expiration presupposes. Apart from that is the Expense for such a rocker exceptionally large, where The leverage known, depending on the pivot position significantly to change. The system is thus expensive, cumbersome and imprecise and relatively poorly controlled.

There are also other folding devices are known in which for example in the manner of a Falzzange (DE US 10016391) the Folding operations are carried out, although substantially are kinematically decoupled, since the Falzzange to a for Closing plane of the same vertical axis of rotation is pivotally, the however, is part of a multi-axis industrial robot with it given extremely high costs.

The invention and its advantages

The invention with the characterizing features of Main claim has the advantage of a very simple contrast extremely precise approach of the tool to the workpiece, splitting the required strokes over one Horizontal slide and a vertical slide to an extremely simple motion coupling leads without consuming and complicated tax funds.

According to an advantageous embodiment of the invention, the Lifting device for tool two vertical procedure Hubvorgänge on, namely a Anfahrhub and a relative to this ongoing working stroke. By this division of the strokes the start can namely on the one hand for pre-folding and on the other hand done for Fertigfalzen by the Anfahrhub, this each in conjunction with the horizontal method using the Horizontal carriage during the actual work process, ie the actual folding caused by the working stroke. This Working stroke can be driven in different ways, for example, electrically but also pneumatically or hydraulically or mechanically. Decisive is that he is independent of Approaching stroke takes place.

After a related advantageous embodiment of the Invention, the Anfahrhub on the vertical slide executable on which a working device for the working stroke is arranged. The working device is thus with the vertical slide method.

After a related advantageous embodiment of the Invention, the working device via a cam driven slide for the relative adjustment of the tool for vertical slide on. Such an eccentric can, for example by an electric motor but also by other means be driven and above all has the advantage of a favorable Power transmission.

According to an additional embodiment of the invention is the Vertical slide driven by a spindle, which in a non-positively connected to the vertical slide threaded unit attacks. Since the actual burden in the folding work on the Horizontal carriage takes place and the adjustment of the spindle is not On or their thread, this can be easily depending on the slope Take on rest. Since these attack in the axial direction, takes place This results in a very favorable distribution of forces throughout Contraption. The drive of the spindle can turn in a variety of ways, for example via an electric motor respectively.

According to an additional advantageous embodiment of the invention The horizontal drive of the horizontal carriage via an in their course from the vertical deviating guide and a pin guided therein, one of which with the Horizontal slide and the other with the vertical slide is positively connected or positively connected. Also by this is extremely powerful and adjustable economically in the Vertical adjustment achieved a horizontal adjustment, so that after finished pre-folding the tool from its working position moved out and the Fertigfalzwerkzeug after appropriate horizontal and vertical shift in his new Working position for the Fertigfalzen is brought, so that take place for example via the eccentric Fertigfalzvorgang can.

According to an additional advantageous embodiment of the invention serves for the pre-folding or for the Fertigfalzen ever one in sync mutually movable tool. Advantageously, this is move this tool vertically or horizontally instead of as with above-mentioned known device via a curved path.

Further advantages and advantageous embodiments of the invention are the following description, the drawing and the Claims removable.

drawing

Figur 1

die erfindungsgemäße Vorrichtung in der Seitenansicht und zum Teil im Schnitt;

Figur 2

einen Ausschnitt aus Figur 1 in vergrößertem Maßstab und mit eingelegtem Werkstück;

Figur 3

eine Darstellung entsprechend Figur 1 aber in Vorfalzstellung und

Figur 4

eine Darstellung entsprechend Figur 1 aber in Fertigfalzstellung.

An embodiment of the subject invention is shown greatly simplified in the drawing and will be explained in more detail below. Show it:

FIG. 1

the device according to the invention in side view and partly in section;

FIG. 2

a detail of Figure 1 on an enlarged scale and with inserted workpiece;

FIG. 3

a representation corresponding to Figure 1 but in Vorfalzstellung and

FIG. 4

a representation corresponding to Figure 1 but in Fertigfalzstellung.

Description of the embodiment

The device according to the invention as shown by way of example in FIG. 1 is shown, is used for pre and Fertigfalzen of sheet metal parts. 1 and 2, as typically used in automotive body construction such folding are connected together. This is a corresponding sheet metal section 3 over the end of another Sheets folded. The associated sheets 1 and 2 (see Figure 2) are by a clamping device, not shown on an abutment 4 clamped, wherein during the folding process the abutment 4 remains in its position whereas two Folding tools, namely a prefolding tool 5 and a Fertigfalzwerkzeug 6 by the inventive device for Performing the folding process to be actuated.

For the folding process, the folding tools 5 and 6 in the respective working position for pre-folding and Fertigfalzen proceed according to the arrows I and II, then thereafter for the Operation, so the actual folding, according to the Arrows III and IV of Figure 3 and Figure 4 to be operated as described below.

With the abutment 4 a machine bed 7 is fixed, in a spindle 8 is mounted, which by a motor. 9 is drivable and on which a horizontally displaceable Horizontal carriage 10 is mounted, the other drive and the Folding tools 5 and 6 carries. About this horizontal slide 10th the folding tools 5 and 6 are horizontal in the direction Workpiece 1, 2, 3 moved according to the arrow I.

The vertical adjustment of the folding tools 5 and 6 via a vertical carriage 11, which extends to a vertical Supporting surface 12 of the horizontal slide 10 is mounted and on the correspondingly adjustable in height, the folding tools 5 and 6 are arranged. On vertical slide 11 is a threaded unit 13th connected, so that when driving the spindle 8 by the motor 9 each according to the direction of rotation of the vertical slide 11 upwards or downwards down including the folding tools 5 and 6 is moved.

About the carriage 10 and 11 thus the folding tools. 5 and 6 to the sheets 1, 2, 3 for the pre-and Fertigfalzvorgang moved up. The actual work step is but by a Working device 14 achieved, the one in the vertical slide 11th mounted shaft 15, a drive motor 16 of this shaft 15 and a Exzentergetriebe 17, in which an eccentric a Worktop 18, arranged on the folding tools 5 and 6 are driven vertically. At the actual operation, namely the folding itself, so are the carriage 10 and 11 in a working position while the actual Folding work is performed by the eccentric 17. in this connection For example, an eccentric may be arranged to have a highest Adjustment of the desired working position corresponds. moreover The most needed worker when folding on separate drive unit, namely the working device 14th transferred with separate drive motor. The only then statically loaded slides 10 and 11 are located in this case Rest.

For the horizontal approach of the folding tools 5 and 6 means of the horizontal slide 10 is a pin 19 which coincides with the Thread unit 13 is connected in a motion-locked and the in a guide groove 20 of the support surface 12 engages, so that a Vertical adjustment of the threaded unit 13 and thus of the pin 19th a horizontal adjustment of the horizontal carriage 10 causes.

FIG. 2 shows a section of the device according to the invention in FIG enlarged scale to illustrate the Workflow when Blechfalzen by representing the sheets. With the solid lines are the two sheets 1 and 2 and the cranked section 3 shown before processing. For the Folding the vertical slide 11 is pushed up and the wing 12 to the left, so that the work surface 21 am Vorfalzwerkzeug 5 above the section 3 comes to rest. Thereafter, by the eccentric 17, so over the Drive motor 16 and the shaft 15, the Vorfalzwerkzeug 5 after moved down and deforms the section 3 in the position 3 ', So an oblique position whose inclination of the inclination of Working surface 21 corresponds to Vorfalzwerkzeug, as in Figure 3 described. Thereafter, the worktop 18 via the Exzentergetriebe 17 moved back and the folding tools via the neutral position shown in the second working position for the Fertigfalzen procedure, as shown in Figure 4. In this Working position will turn over the eccentric 17 the Worktop 18 moved down, leaving the work surface 22 of the Fertigfalzwerkzeuges 6 for resting on the pre-folded Section 3 'passes and this as 3 "in the end position shown Fertigfalzens pressed.

In Figure 3, the inventive device takes a working position for pre-folding. The horizontal slide 10 is due to the Guide groove 20 and the top arranged in the groove pin 19th largely shifted to the left, after and in part simultaneously via the spindle 8 and the threaded unit 13 of the Vertical slide 11 with the worktop 18 is moved upwards has been. After taking this for the pre-folding authoritative Working position is via the drive motor 16 and the Exzentergetriebe 17 the worktop 18 with the on him arranged prefolding tool 5 for the Vorfalzvorgang down postponed. Thereafter, according to the arrow III the Worktop 18 on the eccentric 17 again moved back, after which the carriage 10 and then the Carriage 11 also moved back in reverse direction become.

In Figure 4, the reverse extreme position is shown in the via the spindle 8, the threaded unit 13 and the pin 19 with Guide groove 20 of the vertical slide 11 now its lowest Position occupies, however, the horizontal slide 10 a Position as in Figure 3 occupies. In this position that is Fertigfalzwerkzeug 6 immediately above the already pre-folded Arranged workpiece and is now on the eccentric 17 and the worktop 18 is driven by the drive motor 16 moved down, whereby the Fertigfalzvorgang completed becomes. In FIGS. 3 and 4, as in FIG. 1, the one from the metal sheets 1 and 2 existing workpiece not shown, otherwise the Overall presentation would lose clarity.

After the Fertigfalzvorgang the working device 14 is back in shifted the neutral position shown in Figure 1, in which the folded workpiece is replaced by a new workpiece.

All in the description, the following claims and the Drawing illustrated features can be both individually and be inventive in any combination with each other.

LIST OF REFERENCE NUMBERS

1 + 2

sheets

3

sheet metal section

4

abutment

5

pre-hem

6

Fertigfalzwerkzeug

7

machine bed

8th

spindle

9

engine

10

horizontal slide

11

vertical slide

12

wing

13

threaded unit

14

working device

15

wave

16

drive motor

17

eccentric

18

countertop

19

spigot

20

guide

21

working surface

22

working surface

Claims (7)

Device for pre-and Fertigfalzen of sheets, in particular motor vehicle body parts with festgestehendem, clamped workpiece (sheet metal parts 1, 2, 3), with tool (5, 6) movable for machining the workpiece (1, 2, 3), with a clamping device and an abutment (4) for the workpiece (1, 2, 3) and with a machine bed (7) on which the clamping device, the abutment (4) and / or the tool (5, 6) are arranged non-positively, wherein in the folding position the workpiece (1, 2, 3) by the tool (5, 6) is pressed against the abutment (4), characterized, that the tool (5, 6) in the horizontal (I) and vertical (II) direction relative to the machine bed (7) movable in a straight line, that for the horizontal method (I) on the machine bed (7) has a corresponding horizontal slide (10) is present and in that for the vertical method (II) a vertical slide (11) is mounted on the horizontal slide (10) on which the tools (5 and 6) are arranged. Apparatus according to claim 1
characterized in that for the tool (5, 6) on the vertical slide (11) two lifting operations are feasible, a starting stroke (I, II) to drive the tools (5, 6) in working position and a working stroke (III, IV) for performing the folding process (Figure 3 and 4). Apparatus according to claim 2
characterized in that the vertical slide (11) for carrying out the working stroke, a working device (14) is present. Apparatus according to claim 3
characterized in that the working device (14) has an eccentric gear (17) of the tools (5, 6) in order to achieve a relative displacement between the tool (5, 6) and vertical slide (11) for the working stroke. Device according to one of the preceding claims,
characterized in that the vertical slide (11) via a spindle (8) can be driven, which engages in a non-positively connected to the vertical slide (11) threaded unit (13). Device according to one of the preceding claims,
characterized in that the drive of the horizontal slide (10) via a deviating in its course from the vertical guide groove (20) and a guided therein pin (19), said guide groove (20) or pin (19) with the horizontal slide (10). and pin (19) or guide groove (20) with the vertical slide (11) is positively or positively connected. Device according to one of the preceding claims,
characterized in that for the pre-folding and the Fertigfalzen ever a synchronously movable tool (5, 6) is used.

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