Self-piercing riveting device and method for ultra-high strength steel and light metal

Abstract

The invention provides a self-piercing riveting device and method oriented to ultrahigh-strength steel and light metal. The self-piercing riveting device comprises a power control cabinet, a gas-liquid reinforcing power unit, a riveting execution mechanism, a time relay, a delivery system, a silicon steel sheet enhancing induction heating system and low-heat-conductivity structural glue. The method comprises the following steps: before riveting, coating the structural glue between the ultrahigh-strength steel and the light metal; moving the induction heating system into a riveting position by using the delivery system according to position information; locally heating the ultrahigh-strength steel rapidly and concentrically through the induction heating system; after heating, moving a coil out rapidly; meanwhile, rapidly moving the riveting execution mechanism into the riveting position; rapidly riveting a plate to be riveted which is heated to a specific temperature by pushing the riveting execution mechanism through the gas-liquid reinforcing power unit. Through the thermal restraining effect of the low-heat-conductivity structural glue and accurate control of the time sequence in a thermal riveting process, the problems of severe upsetting of rivets, small joint undercut amount, easiness in forming fractures in the ultrahigh-strength steel and the like during riveting of advanced ultrahigh-strength steel are solved.

Description

technical field [0001] The invention relates to a device and method in the technical field of riveting, in particular to an induction heating-assisted self-piercing glue riveting compound connection device and method for ultra-high-strength steel (ie ultra-high-strength steel) and light metal. Background technique [0002] In recent years, with the dwindling oil resources and increasing environmental pollution, the lightweight of automobile bodies aimed at improving fuel economy and environmental performance has become the general trend of the development of the automobile industry. The mixed application of non-ferrous alloy materials such as magnesium and aluminum and high-quality-strength-ratio materials such as advanced ultra-high-strength steel has naturally become an important means of lightweighting the body. However, non-ferrous alloy materials such as magnesium and aluminum have good thermal conductivity, high electrical conductivity, and are easy to alloy with coppe...

AI Technical Summary

Problems solved by technology

The present invention solves the problems of severe thick pier of rivets, small joint undercut, and easy cracks of ultra-high-strength steel through the thermal inhibition effect of low-thermal-conductivity structural glue and the precise timing control of the hot riveting process. It effectively reduces the plastic deformation resistance when riveting ultra-high-strength steel, improves the comprehensive connection quality of the joint, and has a very low cost compared with laser heating and other means

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