JP2859561B2 - Method and apparatus for stamping a molding on a sheet panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for stamping formed parts on sheet panels having different thicknesses, wherein the sheet panel is fed along a conveying path and is cut without interrupting the feed stroke. The present invention relates to a tool for embossing, and an apparatus for performing the method.

[0002]

BACKGROUND OF THE INVENTION More and more sheet panels are being manufactured, in particular for the automotive industry, and for other uses, from sheet metal parts of different thicknesses, for example, by roller seam welding or by roll seam welding. It is composed by laser welding. The seat panel is formed by deformation into a structural part, for example an automobile / body part, and such a component has precisely defined properties based on the different material thicknesses in each section. In this case, the sheet panels are produced in large quantities almost automatically on equipment including automatic welding machines, conveyor equipment and storage stations. When stacking such sheet panels, the piles are tilted due to the uneven thickness of the sheet panels, and such tilted piles cannot be handled or transported. Accordingly, the thin and relatively thick sections of the sheet panel can be stamped using conventional presses, while the sheet panel is stationary during the stamping process, to stamp grooves (eg, small recesses or moldings). It is known that the grooves allow a uniform stacking of piles.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the stamping process for stamping a molded part on sheet panels having different thicknesses, thereby increasing the production capacity of automatic welding machines and conveyor equipment. , So that it can be fully utilized and the stamping process can be performed economically. It is a further object to provide an apparatus for performing an embossing method for embossing a formed part on sheet panels having different thicknesses.

[0004]

In order to achieve the above object, in a method according to the present invention, an embossing tool is driven from a standby position by a command of a control device, and is moved toward a sheet panel for embossing a forming section. , And returns to the standby position again after the embossing. Furthermore, in order to carry out the method, in an arrangement according to the invention, the embossing tool comprises at least one rotatable embossing element on each of the upper and lower sides of the transport path, A control device acting on the drive of the stamping element, wherein the element has a male mold for forming the molding and the second stamping element has a master mold for forming the molding; It is provided that the control device activates the drive from the standby position and, after rotation of the embossing element, moves it to the standby position again.

[0005]

1 and 2 show a sheet panel (thin plate: Ble).
1 schematically shows a sheet panel 4 in which sheet parts 1, 2, 3 of different thickness are combined by welding. Reference numerals 5 and 6 indicate welding seams. The sheet metal parts 1, 2, 3 usually have different thicknesses t1, t2, t3. The seat panel 4 is, for example, a so-called tailored blank (ta) in the automobile industry.
It is used for producing deep drawn body parts with precisely defined characteristics as an illuminated blank. For this reason, the seat panel 4 is transformed into a desired part as a whole. The sheet panels 4 are manufactured in large numbers and at high speeds by fully automatic or partially automatic devices, which include automatic welding machines, stacking devices and conveyor devices. Each welding seam 5, 6 is welded by an automatic welding machine at a speed of 10 m / min or higher. Intermediate products, for example partial panels consisting of sheet metal parts 1 and 2, and the final product (i.e. the sheet panel 4) are stacked and stored. In order to arrange such a sheet panel 4 in a substantially uniform pile 8 on, for example, a pallet 7 (FIG. 3), the sheet panel is provided with a stamped form, whereby the thickness of the sheet is reduced. The difference is compensated for the stack.

FIG. 4 schematically shows the edge area 13 of the pile 8 on an enlarged scale. In this case, the seat panel 4,
4 ', 4 "individual thin plate portions 1, 1', 1"
9), 9 ', 9 ", the formation corresponding to the thickness t2 of the thick sheet part 2 in the region of the thin sheet part 1, 1', 1" It is designed to give thickness. The sheet metal part 3 may also be provided with a similar shaped part, for example, a sick. By providing the moldings, the sheet panels 4 are stacked in a substantially uniform, non-tilting pile 8. The formation of the molded part 9 is performed at any time. The individual sheet parts can already be stamped or pressed before welding, and the part panels can be treated accordingly or the finished sheet panel 4 can be provided with moldings. Such moldings usually serve only for stacking and do not function in the finished sheet metal part. Therefore, usually only as little and as little forming parts as possible are stamped, so that the finished sheet part is not damaged by the forming parts.

FIG. 5 schematically shows the embossing of a molded part according to the prior art. In this case, the sheet panel 4 or a part of the sheet panel is placed on a conveyor and fed through a conventional embossing device having a matrix 11 and a male mold 11 '. In order to form a molded part in the sheet panel 4, the sheet panel is stopped on a conveying path, that is, on a conveyor line,
Then, the molded part is formed in the seat panel by moving the master mold and the male mold so as to approach each other vertically. Next, the sheet panel 4 is accelerated again and sent out from the embossing device. Obviously, in the known process, the sheet panel must be stopped on the conveyor line in each case, kept stationary for a certain time and then accelerated again. This is inconvenient for high-speed sheet panel production and requires a large amount of space. Such an embossing device will limit the production speed. Connecting multiple stamping stations in parallel is an uneconomical measure, and in addition to the cost of purchasing another stamping device, changes must be made to the control and operating mechanisms of the manufacturing equipment.

FIG. 6 is a schematic diagram of an embossing device according to the present invention. The sheet panel 4 or partial panel is likewise fed along a conveyor device. The embossing device is configured such that the embossing takes place during the transport movement, so that the sheet panel 4 does not need to be stopped and need not be accelerated again. Such an embossing device is schematically illustrated by a rotatable disk 12 with projections and a rotatable disk 12 'with grooves. Instead of a central disk 12 with projections, for example, an eccentric disk can also be used.

FIGS. 7 and 8 schematically show an embodiment for forming an embossed portion, ie, a molded portion. 7 is a side view, and FIG. 8 is a partial cross-sectional view along the line AA in FIG. On the upper side of the sheet panel 4 which is placed on a conveyor device (not shown) and is fed in the direction of the arrow, a disk 22 having a projection 23 on its peripheral surface is eccentrically arranged on the shaft. The disk 22 has an arrow 27 about a rotation axis 28.
Can be eccentrically rotated by a driving device (not shown). An eccentrically mounted, preferably also rotatable disk 22 'is provided on the underside of the seat panel 4 or the conveyor device (rotation axis 28', rotation direction 2).
7 '), the disc is provided with a groove. In this case, the projection 23
The groove and the groove form a male mold and a mother mold for forming the molded portion 9 in the sheet panel 4 by stamping. In the stationary state, the disk 22 is at a position where the projection occupies the standby position 24 indicated by a broken line. In this position, the sheet panel 4 can pass unhindered between the two discs 22, 22 'along the conveyor device due to the eccentric arrangement of the discs. When a command (not shown) is issued by a control device for embossing a molded part on the sheet panel 4 fed between the two disks, the disk 22 is driven in the direction of arrow 27 and accelerated. Thereby, the projection 23 is accelerated from the standby position 24 and hits the sheet panel 4 at a peripheral speed substantially corresponding to the transport speed of the sheet panel 4. When the projection 23 abuts on the seat panel, the projection presses the desired molded portion 9 into the seat panel. Disk 22 'provided with a groove as a matrix for projection 23 acting as a male mold
Is used. Advantageously, the disk 22 'is also
, Or in synchronization with the feeding of the sheet panel 4. After the embossing of the molding part 9, the projection 2
The disk 22 with 3 again occupies the standby position 24. For this purpose, the disk 22 is rotated towards its rest position after entering the groove or after stamping of the molding and is gradually braked. Due to the eccentricity of both, the sheet panel does not contact the disk, ie the roller.

The disk 22 provided with the projections 23 may be configured as shown in FIG. In this case, the disk 22
Is assembled from three individual discs 30, 31, 32. The central disk 31 has the original projections 23. The discs 30, 32 are also eccentric in the region of the projections 23 and have shoulders 38, 39. The same is the disk 22 'assembled from three disks 34, 35, 36
In this case, the disks 34, 36 are also eccentric and have shoulders 40, 41, which cooperate with the corresponding shoulders 38, 39 so that the seat panel 4 is held during stamping. In this case, the eccentric disk 22 ′ is driven synchronously with respect to the disk 22 and cooperates with the projections 23 on the shoulders 38, 40, 39,.
41 act on the seat panel 4 at the same time.

Of course, for example, the eccentric 1
It is also possible to use one disc and a plurality of discs with grooves as a matrix, and any other embodiments are possible. The important thing is that the stamping
Is performed during a feed movement that is almost unimpeded or only decelerated. For this purpose, the embossing tool performs not only a vertical embossing movement but also a movement in the feed direction. Stamping depth is disk 2
It can be adjusted within a predetermined range by vertical adjustment of the rotation axis of 2,22 '. Different disks with different protrusion heights or different groove depths can also be used. The start signal for performing the embossing is generated in a known manner by a control device which is also used in conventional embossing methods. The control device acts in such a way that the moldings are not always stamped in the same place, which is well known and shown in FIG.
It is shown in

FIG. 9 schematically shows another embodiment.
In this case, the embossing tools 50, 51 perform a longitudinal movement along the tracks 52, 53 in addition to the vertical movement for embossing the formed part, and thus follow the feed of the sheet panel 4. ing. After the forming portion is formed by stamping, the stamping tool is released again from the sheet panel and returned to the standby position. Male and mother movements are indicated by arrows ad. An embossing movement is produced by the actuating members 54, 55, a longitudinal movement being carried out in one direction by the feed movement of the sheet panel itself, and in another direction by a drive (not shown). Also works in the feed direction if necessary.

Advantageously, the embossing takes place immediately after each welding, for example in combination with an oiling and brushing station for the sheet panel. In this way, the handling of the sheet panel is significantly simplified throughout the device.

[Brief description of the drawings]

FIG. 1 is a plan view of a welded sheet panel.

FIG. 2 is a side view of the seat panel of FIG. 1;

FIG. 3 is a side view of a pile formed by stacking sheet panels.

FIG. 4 is a partial detailed view of a pile.

FIG. 5 is a schematic view of an embossing device according to the prior art.

FIG. 6 is a schematic diagram of an embossing device according to the present invention.

FIG. 7 is a schematic side view of one embodiment of an embossing device according to the present invention.

FIG. 8 is a partial sectional view of the embossing device of FIG. 7;

FIG. 9 is a schematic side view of another embodiment of the embossing device.

[Explanation of symbols]

1,2,3 sheet part, 4 sheet panel,
5,6 welding seam, 12,12 'disk, 22 disk, 23 protrusion, 24 standby position,
28 axis of rotation, 30, 31, 32;
36 disc, 38, 39; 40, 41 shoulder, 5
0,51 stamping tools, 54,55 operating members

Continuation of the front page (72) Inventor Werner Uhleich Kaiserstuhl Reingasse, Switzerland 28 (56) References JP-A-56-126033 (JP, A) JP-A-3-52721 (JP, A) JP-A 48 −52854 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B21D 22/02 B21D 43/22

Claims (7)

(57) [Claims] 1. A method for stamping a shaped portion in a sheet panels having different thicknesses, sent along a sheet panel conveyance path, by the stamping tool without feed stroke interrupted
In the type of embossing , the embossing tool is
Drive from standby position by command
Move toward the sheet panel for engraving and press
A method for stamping a molded part on a seat panel, characterized by returning to a standby position again later . An apparatus for stamping a shaped portion by stamping tool sheet panels having a wherein different thicknesses, pressure
Engraving tools can be driven to rotate on the upper and lower sides of the transport path, respectively.
At least one embossing element,
One stamping element has a male mold to form a molded part
And the second embossing element is used to form the molding.
Has a matrix and acts on the drive of the stamping element
Control device, and a drive device is provided by the control device.
Is activated from the standby position and the embossing element
After the rotation, it was moved to the standby position again
Characterized in that there, apparatus for stamping a shaped portion in a sheet panels having different thicknesses. 3. The stamping tool according to claim 2, wherein the first stamping element of the stamping tool has an eccentric disc (31), which disc forms a stamping die. apparatus. 4. The stamping tool is provided with a single eccentric disk (3).
Another two disks (30, 32) arranged on both sides of 1)
4. The device as claimed in claim 3, wherein the further disks have eccentrically arranged shoulders (38, 39). 5. The second stamping element of the stamping tool has a central disc (35) and two discs (34, 36) connected on opposite sides of said disc. 3. The disk according to claim 2, wherein the two disks have eccentric shoulders.
The described device. 6. The stamping tool according to claim 1, wherein the first stamping element of the stamping tool comprises a roller having projections eccentrically arranged on the peripheral surface, said projections forming a stamping male mold. 3. The device according to claim 2, wherein the second stamping element of the tool comprises a roller with an annular groove. 7. An embossing tool connected to the welding machine or directly behind the welding machine and, in particular, an oiling device for the treatment of sheet panels in order to keep the transport costs of the sheet panels as low as possible. And a brushing station in combination with the brushing station.
An apparatus according to any one of the preceding claims.