DE102008008657B3 - Production of a locally reinforced molded plate used in vehicle construction comprises pressing an insert from a counter holder into a recess formed in the plate after opening the stamping die and further processing - Google Patents

Abstract

Production of a locally reinforced molded plate (1) comprises pressing an insert separated from a reinforcing material from a counter holder (13) into a recess (4) formed in the plate after opening the stamping die (7), removing the remainder of the reinforcing material and joining the insert and the molded plate.

Description

The The invention relates to a method for producing a locally reinforced molding board according to the characteristics in the preamble of claim 1.

on the other hand The invention is directed to a molding board as at least indirect Component of a motor vehicle structure according to the features in Preamble of claim 7.

in the In the pursuit of the weight of automotive structural components, such as axes, columns etc. to reduce counts It is the state of the art, the thicknesses of such components largely to reduce and only locally there bigger thicknesses where appropriate, based on what is expected in practice Loads the base thicknesses of the components are insufficient.

Even though it in many cases sufficient, the molding boards for the production of components for motor vehicle structures only locally to reinforce can they reinforcements so far only by means of additional Attachments, using Tailored Welded Blanks (TWB), by Tailored Rolled blanks (TRB) or by patching be realized. at TWBs and TRBs the reinforcements always over the entire extension of a form board are made. The The desired reduction in weight is therefore not satisfactory. When patching, the crevice corrosion between the joined individual parts proves as problematic.

In the DE 196 43 076 C2 It is proposed to add two sheet metal parts by punching in one step. When punching two superimposed sheet metal components, a counter support blocks the lowering such that a section of the sheet metal component lying above is arranged in a punched-out recess of the lower sheet metal component.

The publication DE 41 10 418 C1 describes a method for producing a sheet of sheet metal parts of different thickness. The displacement of the sheet metal parts takes place simultaneously with the stamping step, wherein a stamped out of an upper sheet metal part is pressed by the movement of the punch in a punched-out recess of a second sheet. The device has no counter-holder, but the positioning of the sheet metal part is carried out by deliberately interrupting the lowering movement of the punch.

Of the Invention is - starting from the prior art - the Task, an improved method for producing a locally reinforced molding board as at least indirect component of a motor vehicle structure create a reinforcement over the entire component width is not necessary if only local reinforcements due to the expected in practice in each case loads are expedient, to realize the desired weight reduction of the components.

The This object is achieved by a method with the measures of claim 1.

On This way, with appropriate design and layout of the Configuration of the insert (round, oval, polygonal) the local or local reinforcement the molding board and thus ultimately at least partially from the forming board made component of a motor vehicle structure only the area reinforced Be the greater part of the load of the component ago than the remaining areas must have with minimized thickness.

Of the Depending on the requirements of the component, use can only be made after one Projecting side or even on both sides of the molding board. This depends, for example, on in what way the local increased Forming board ultimately as at least indirect component of a motor vehicle structure cold or hot is further transformed. The configuration of the insert is determined by the size and the Determined position of the intended reinforcement of the form board.

It is within the meaning of the invention, if necessary, more than a portion of a forming board in one operation with a reinforcing insert is provided.

A advantageous embodiment of the inventive concept exists in the features of claim 2. Thereafter, first over a in a first step from a flat board or out a form wound by a coil developed sheet metal molding board a reinforcing material positioned. The reinforcing material placed on the form board is then in a further step together with the forming board in that to be reinforced Area of the molding board forming the insert of the reinforcing material and a section of the form board in a separating cut perforated. It creates in this way a continuous recess in the reinforcing material and in the form board. After that, after removing it of the remaining reinforcing material in a third step from the reinforcing material separate insert so far pressed into the recess of the form board, such as it is required in each case. The mission then stands to one side or also on both sides of the form board. For fixation of the insert in the form board, this is ultimately with the form board firmly attached.

To The features of claim 3 may in particular for the purpose of loss prevention of the insert pressed into the recess of the molding board, to attach the insert to the form board. This allows the molding board with the use also interposed in a rough operation arbitrarily and transported as needed. The term "stapling" is in the sense of present invention, a positional fixation by positive engagement, adhesion or material connection. The stapling can for example the way of caulking edge portions of the insert and / or performed the molding board become.

According to the characteristics of claim 4, the joining takes place the use of the molding board by welding. This is in particular the laser welding used, whereby only comparatively narrow areas of the form board and the insert are briefly transferred to a molten state.

In dependence from the location of the created from the forming board component of Motor vehicle structure and the expected loads can However, it suffice according to claim 5, that the joining of the insert with the forming plate taking advantage of the process heat in a hot forming the provided with the insert molding board by means Soldering is performed.

A further advantageous embodiment of the inventive method is seen in the features of claim 6.

Corresponding In a first process step, this proposal will be replaced by a Coil unwound sheet or a board in a mold introduced. In this mold then the form board is created.

In a further process step is the mold board on the lower die placed a punch and the forming board is a reinforcing material according to the features of claim 3, the joining takes place the use of the molding board by welding. This is in particular the laser welding used, whereby only comparatively narrow areas of the form board and the insert are briefly transferred to a molten state.

In dependence from the location of the created from the forming board component of Motor vehicle structure and the expected loads can However, it suffice according to claim 4, that the joining of the insert with the forming plate taking advantage of the process heat in a hot forming the provided with the insert molding board by means Soldering is performed.

In a further process step is the mold board on the lower die placed on a punch and the forming board is a reinforcing material placed. The lower die has a movable counter support opposite to a punching tool on the upper die of the punch.

If then lowered in a subsequent process step, the upper Gesenk becomes the reinforcing material and punched the forming plate in a train successively and this out the reinforcing material an insert and from the form board a cut-separated, which together in the leadership for the Gegenhalterung be moved in the lower die into.

The Invention is described below with reference to the drawings embodiments explained in more detail. It demonstrate:

1 in schematic perspective, a moldboard with a local reinforcement;

2 a vertical longitudinal section through the representation of 1 along the line II-II seen in the direction of arrows IIa, according to a first embodiment;

3 a vertical longitudinal section through the representation of 1 along the line II-II seen in the direction of arrows IIa, according to a second embodiment;

4 in view, partly in section, a punch in a first process situation;

5 the punch of the 4 in a second process situation;

6 the punch of the 4 in a third process situation and

7 the punch of the 4 in a fourth process situation.

With 1 is in the 1 to 7 denotes a forming board, which has been created in a non-illustrated process step from a flat board or from a unwound from a coil sheet metal strip. The form board 1 forms an at least indirect component of a motor vehicle structure, also not shown.

The form board 1 of the 1 to 3 indicates a local reinforcement in the form of an insert 2 (Inlet). The exemplary embodiment is a cylindrical insert 2 , The use 2 but can also have a different configuration. The height H of the insert 2 corresponds approximately to twice the thickness D of the molding board 1 ,

As the 2 and 3 can be seen closer, the application stands out 2 to one side over the form board 1 in front. He is according to the embodiment of 2 by means of laser beams 3 in a recess 4 the form board 1 established.

The determination of the use 2 in the recess 4 the form board 1 can after 3 but also during a hot forming process by means of soldering done. Here, the heat sources for melting a solder with 5 and the lot with 6 designated.

Based on 4 to 7 Below is the production of the with the use 2 provided molding board 1 of the 1 explained.

For this purpose, a punch arrives 7 for use, which is a locally fixed lower die 8th and a vertically movable upper die 9 having. The upper part 9 is with a punch tool 10 provided, which is the contour of the recess 4 in the form board 1 certainly.

With the lower part 8th is a basic tool 11 with a central guide 12 connected, in which a Gegenhalterung 13 is guided vertically displaceable. The vertical upward shift can be done by means of a spring 14 or by means of pneumatic or hydraulic force. The leadership 12 lies in the axial extension of the punch 10 ,

According to the 4 is the formed from a board or a withdrawn from a coil sheet metal strip molding board 1 on the basic tool 11 placed and on the form board 1 a reinforcing material 15 placed in the form of, for example, a sheet whose thickness D1 is the height H of the insert 2 in the form board 1 according to 2 equivalent.

If then according to the arrow Pf in 5 the upper part 9 with the punch tool 10 is moved downward, one perforation of the reinforcing material takes place successively 15 as well as the form board 1 in the form of a so-called double sheet metal hole, wherein from the molding board 1 a section 16 and from the reinforcing material 15 the use 2 punched and in the central leadership 12 of the basic tool 11 be relocated. Due to the perforation of the molding board 1 arises in this the recess 4 ,

After opening or while opening the punch 7 according to the representation of 6 are then from the counter support 13 the cutout 16 and the use 2 in the lead 12 shifted so far to the top that only the use 2 into the recess 4 the form board 1 is pressed. In the embodiment, this happens so far that according to the 2 and 3 the bottom 17 of the insert 2 with the bottom 18 the form board 1 lies in one plane.

After removing the with the insert 2 provided molding board 1 from the punch 7 become the perforated remainder of the reinforcing material 15 as well as the neckline 16 the form board 1 also from the punch 7 removed and preferably fed to the scrap.

In the 7 is still shown that, as needed in an intermediate process step the use 2 with the form board 1 stapled, for example, caulked can be. This is done when using the 2 provided molding board 1 should be temporarily stored and / or forwarded. This ensures a loss of security. For stapling, the punch 7 with appropriately adapted tools 19 and 20 be used. The points marked with x schematically illustrate the tool contact with the workpiece.

The final fixation of the insert 2 in the form board 1 takes place - as already described - by welding or soldering according to the representations of 2 and 3 ,

1

form board

2

commitment

3

laser beams

4

Recess in 1

5

heat sources

6

solder

7

punch

8th

lower die

9

upper die

10

punch

11

basic tool

12

Leadership in 11

13

against mount

14

feather

15

reinforcing material

16

Extract from 1

17

bottom

18

bottom

19

Tool

20

Tool

D

thickness

D1

thickness

H

height

pf

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Claims (4)

Method for producing a locally reinforced molding board ( 1 ) as at least mediate Component of a motor vehicle structure, wherein first of all a shaping plate (FIG. 1) produced in a first operation from a planar board or from a sheet-metal strip unwound from a coil 1 ) in a movable counter-holder ( 13 ) having punch ( 7 ) a reinforcing material ( 15 ), whereupon the reinforcing material ( 15 ) and the molding board ( 1 ) in the region of the form board to be reinforced ( 1 ) forming an insert ( 2 ) as well as a detail ( 16 ) from the form board ( 1 ) are perforated in a separating cut, wherein in at least one region of the shaping plate to be reinforced ( 1 ) a recess ( 4 ) and of which in the thickness (D1) is greater than the thickness (D) of the molding board ( 1 ) sized reinforcing material ( 15 ) to the recess ( 4 ) adapted use ( 2 ), characterized in that after opening the punch ( 7 ) of the reinforcing material ( 15 ) separate use ( 2 ) of the counter-holder ( 13 ) in the in the form of board ( 1 ) prepared recess ( 4 ), the remainder of the reinforcing material ( 15 ) and the section ( 16 ) and then the insert ( 2 ) and the molding board ( 1 ). A method according to claim 1, characterized in that after pressing the insert ( 2 ) in the recess ( 4 ) of the form board ( 1 ) the use ( 2 ) to the molding board ( 1 ) is stapled. Method according to claim 1 or 2, characterized in that the joining of the insert ( 2 ) with the molding board ( 1 ) by means of welding. Method according to one of claims 1 to 3, characterized in that the joining of the insert ( 2 ) with the molding board ( 1 ) using the process heat in a hot forming of the with the use ( 2 ) provided molding board ( 1 ) is performed by means of soldering.