Self-piercing riveting device for ultra-high strength steel plate and aluminum alloy plate

Abstract

The invention discloses a self-punching riveting device of an ultrahigh strength steel plate and an aluminum alloy plate. The problem that in the prior art, under the premise that the mechanical property of the ultrahigh strength steel plate cannot be guaranteed, connecting of ultrahigh strength steel plate and aluminum alloy is achieved is solved. The self-punching riveting device of the ultrahigh strength steel plate and the aluminum alloy plate comprises a composite punch (1), a punch side pressing ring (22) and a composite concave die (14). The composite punch (1) comprises a first cooling gas pipeline (2) and a punch body (5). The composite side pressing ring (22) comprises a side pressing ring body (23). The composite side pressing ring (22) and the composite concave die (14) are arranged oppositely in an overlaying mode. The bottom face of the side pressing ring body (23) and the top end face of a concave die body (15) in the composite concave die (14) are in contact connection. The composite punch (1) is placed in a center hole of the side pressing ring body (23) and is in sliding connection. The rotation axes of the composite side pressing ring (22), the composite punch (1) and the composite concave die (14) are collinear.

Description

technical field [0001] The invention relates to a processing device in the field of automobile manufacturing, more precisely, the invention relates to a self-piercing riveting device for an ultra-high-strength steel plate and an aluminum alloy plate. Background technique [0002] In recent years, energy and environmental issues have become increasingly prominent, prompting the rapid development of lightweight technology in the automotive industry. It has become the most important means to reduce the weight of the car body by using a large number of lightweight and high-strength materials (such as high-strength steel plates, aluminum alloys, and magnesium alloys, etc.) to achieve significant weight reduction. [0003] When welding steel plates, as the steel strength level increases, the welding stability will decrease, the plastic toughness will deteriorate, the crack sensitivity will increase, and the performance of the heat-affected zone will change, which will reduce the p...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the problem that the existing technology cannot realize the connection of ultra-high-strength steel and aluminum alloy under the premise of ensuring that the mechanical properties of the ultra-high-strength steel plate are not affected, and provides an ultra-high-strength steel plate and aluminum alloy Alloy plate self-piercing riveting device

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