Punch for mechanical connection, mechanical connection device and mechnical connection member

Abstract

The invention provides a punch for mechanical connection, a mechnical connection device and a mechnical connection member so that full boding strength can be obtained even when board thickness and strength deviation of boards occurs. In the punch for mechanical connection,a groove (21) or a protruding strip extending along an axial dirction of the top end of the punch (20) is formed on the circumferential lateral surface (20b) of the top end portion (20a) of the punch (20).

Description

technical field [0001] The present invention relates to a punch for mechanical connection (Japanese: メカカニカルクリンチ), a mechanical connection device, and a mechanical connection member. Completed mechanical connection components. Background technique [0002] It has been known for a long time that, for a plurality of stacked metal plates, the metal plates are plastically deformed by punches and dies, and these metal plates are riveted together, that is, the so-called mechanical connection joint (refer to Figure 11 ). In this mechanical connection joining, the punch 101 is lowered, for example, two metal plates (hereinafter referred to as upper and lower plates) 102, 103 are pressed into the concave portion 104a of the die 104, and then, as the final stage of joining, in order to align the punch 101 applies a greater force to pressurize, that is, to perform the so-called setting press (Japanese: 决め抱し), and the upper and lower plates 102, 102, 103 is crushed in the plate thickn...

AI Technical Summary

Problems solved by technology

[0004] However, Figure 11 In the mechanical connection device in the prior art shown, because of its simple cylindrical concave die 104, the space where the upper and lower plates 102, 103 can plastically flow in the outer diameter direction when they are joined is limited.

Therefore, even with the lower plate 103 in the Figure 11 The material in the part surrounded by the circle indicated by the arrow A flows, and cannot retreat to any place, which becomes a large resistance to the above-mentioned plastic flow

Therefore, in the above-mentioned conventional mechanical connection device, the interlock S1 of the upper and lower plates 102, 103 cannot be increased due to the resistance to plastic flow, and as a result, sufficient joining force cannot be obtained.

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