Self-punching bond-riveting connecting device and bond-riveting method

Abstract

A self-punching bond-riveting connecting device comprises a compound female die, a compound edge pressing ring, heat conduction electrodes and a punch, wherein an annular groove is formed in the compound female die, the compound edge pressing ring is opposite to the compound female die in the vertical direction, the compound edge pressing ring can move in the vertical direction and is used for pressing to-be-riveted pieces, the heat conduction electrodes are arranged at the bottom of the compound edge pressing ring and the upper portion of the compound female die and can heat the different to-be-riveted pieces independently, and the punch is a solid circular structural piece, is arranged in a central hole of the compound edge pressing ring and can slide up and down in the axial direction of the central hole. The expanding performance of super-strength steel nearby riveting points is greatly improved, and the problems that super-strength steel is difficult to deform and effective connectors can not be formed are solved. The invention further provides a self-punching bond-riveting connecting method. By precisely controlling the punching speed of the punch, the requirements for the strength of the rivet, the punch riveting capacity of the device and the rigidity of a C-shaped frame of a riveting gun are lowered, and production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of high-strength steel riveting, in particular to a self-piercing adhesive riveting connection device and a method for realizing punching adhesive riveting. Background technique [0002] The development of the automobile industry has brought enormous pressure on energy, climate, and the environment. Reducing fuel consumption, energy conservation and emission reduction has become an urgent problem for Chinese automobiles, and automobile lightweight has become an important means to solve this problem. [0003] Lightweight materials such as high-strength steel plates, aluminum alloys, and magnesium alloys have replaced traditional steel plates and become the main method for achieving lightweight automobiles, while the application of new materials poses a huge challenge to automotive connection technology. When traditional resistance spot welding is used to connect high-strength steel and aluminum alloy, due to ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of this invention is to design and develop a self-piercing sticky riveting connection device based on the semi-hollow self-piercing riveting connection technology. By introducing the tempering and annealing characteristics of metal materials, local tempering heat treatment is performed on ultra-high-strength steel, and the riveting is properly reduced. The strength of the ultra-high-strength steel near the riveting point greatly improves the ductility of the ultra-high-strength steel near the riveting point, and solves the problem that the ultra-high-strength steel is difficult to deform and cannot form an effective joint

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