Method and stamping device for joining

A punching device and punch technology, applied in forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of impossible application and difficult realization, and achieve the effect of reducing weight, cost, and offsetting thermal bending deformation

Active Publication Date: 2018-01-30
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This bending deformation makes this method difficult or impossible for some use cases, such as door frame flanges

Method used

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  • Method and stamping device for joining
  • Method and stamping device for joining
  • Method and stamping device for joining

Examples

Experimental program
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Embodiment Construction

[0025] figure 1 A side part 10 of a motor vehicle is shown schematically in FIG. 2 , where a method for connecting a steel inner panel to a soft metal outer panel by means of an undercut flange is used. The glue in the undercut flange can be hardened after punching, but this is not necessary for the method according to the invention. The side part 10 has one or more undercut flanges 12 in the region of the door frame. The undercut flange 12 can be produced by means of a roll-folding device which is guided here by a robot or which is fed laterally to the roll-folding device by an automatic machine or the like.

[0026] The undercut flange 12 has six degrees of freedom on the end face of the inner panel. Include two tangential movements in tangential X. This movement is allowed and not fixed by the method according to the invention. The two degrees of freedom of movement in the vertical direction Z are generally determined by the undercut and are likewise unimpeded. The mov...

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Abstract

The invention relates to a method for connecting a steel inner panel (14, 14a) and a soft metal outer panel (16) by means of an undercut flange (12). It is provided that, after folding the outer panel (16), stamping is carried out in the area of ​​the undercut roll (20) of the undercut flange (12), so that the outer panel (16) is prevented in the direction of the inner panel (14, 14a) ( Y) slide up. The invention also relates to a stamping device (30) for stamping an undercut flange (12) of an inner panel (14) made of steel and an outer panel (16) of soft metal.

Description

technical field [0001] The invention relates to a method for joining steel inner panels and soft metal outer panels by means of undercut flanges and a stamping device for stamping the undercut flanges. Background technique [0002] Hybrid constructions consisting of high-strength and very high-strength steel inner panels and soft metal outer panels, such as aluminum outer panels, are increasingly being used for weight reduction purposes in the automotive industry and elsewhere. This requires entirely new or optimized connection technologies. One possibility is a riveted connection, but this is only possible with soft metal and very wide flanges. Another possible solution is folding, specifically rolling folding. Here, an aluminum outer panel is formed on a hot-formed steel inner panel or similar very high-strength inner panel. For a hermetic connection of two boards, an adhesive, such as an epoxy adhesive, is used between the two boards. This epoxy adhesive hardens at ap...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B21D39/00B21D37/00B21D22/02
CPCB21D39/026B21D39/023
InventorF·皮萨尼R·瓦格纳C·博罗韦茨S·克鲁尔S·恩格尔
OwnerVOLKSWAGEN AG