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Method and tool for clinching thick sheet metal, and use of the tool

A technology for riveting tools and metal workpieces, which is applied in the fields described in the preamble, can solve the problems of inability to rivete metal plates and other metal workpieces, and achieve the effects of less joint cost, better support characteristics, and avoidance of distortion.

Inactive Publication Date: 2009-12-23
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, so far it has not been possible to rivet metal plates and other metal workpieces with a thickness greater than 4mm.
Furthermore, until now it was only possible to join two identical or similar metal sheets to each other by riveting

Method used

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  • Method and tool for clinching thick sheet metal, and use of the tool
  • Method and tool for clinching thick sheet metal, and use of the tool
  • Method and tool for clinching thick sheet metal, and use of the tool

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Embodiment Construction

[0037] As stated at the beginning of the description, the scope of this patent application relates to riveting without cutouts. The form of riveting is a pure deformation joining process. The workpieces are joined only by osmosis combined with sinking and subsequent compression. The main idea behind the development of this method without cutting parts was first of all to seek an increase in the stiffness of the connection caused by greater material cohesion.

[0038] exist figure 1 The principle of the invention is only schematically shown in the diagram. The two metal workpieces 11 and 12 shown are connected to one another by riveting 13 . A part of the punch 20 , referred to here as a punch, is shown above the rivet 10 or the rivet point 10 .

[0039] The riveting tool 20 includes a punch and a collapsing tool 30 which can be designed as a die or an anvil. The punch is designed rotationally symmetrically with respect to its axis of rotation 24 . The punch has a side 25...

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Abstract

The invention relates to a clinching tool (20) for establishing a load-bearing, or supporting, or stable connection of a first metal workpiece (11) to a second metal workpiece (12). The clinching tool (20) comprises a male die (20) and a female die (30), which together form and join a clinching connection (13) connecting, or permanently connecting, the first metal workpiece (11) to the second metal workpiece (12), via local, plastic deformation or reshaping. The male die (20) has a die having a flank (25) disposed concentrically to the rotational axis (24). The flank (25) has a face surface (23) that is positioned perpendicular to the rotational axis (24). The flank (25) is conically shaped at least in the lower transitional region (21) to the face surface (23) and has a flank angle (W, W1, W2) that is smaller than, or equal to, 10 degrees, preferably smaller than, or equal to, 5 degrees.

Description

technical field [0001] The invention relates to a riveting tool according to the preamble of claim 1 for producing a load-bearing connection of two metal workpieces, a riveting tool according to the preamble of claim 10 for riveting metal Workpieces to produce a load-bearing connection, and a method of use of such a riveting tool according to the preamble of claim 15. Background technique [0002] Riveting has long been known as a deformation joining method. This method is also known as crimping. Riveting is a transformational joining process which, depending on the embodiment, does not require the use of auxiliary joining elements. [0003] For riveting there are various variants for producing joints. The characteristics of riveting are as follows: [0004] - according to the structure of the joined elements: riveting with cut parts and riveting without cut parts; [0005] -According to the die shape: rigid die and open die; [0006] - According to tool kinematics: si...

Claims

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Application Information

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IPC IPC(8): B21D39/03
CPCB21D39/031Y10T29/49908B21D39/03B23P11/00B23P19/02B25B27/02
Inventor A·特洛杰M·马泰塞尔T·依莱蒂茨T·诺瓦塞克
Owner FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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