A riveting-free connection process of heterogeneous sheet materials

Abstract

The invention discloses a no rivet connection process for heterogeneous sheets. The no rivet connection process comprises the steps of step (1), pretreating a first sheet, and making a dangerous section, wherein the dangerous section is an annular dangerous section, a columnar dangerous section or a dangerous section formed by the combination of a ring shape and a column shape; step (2), and usingthe pretreated first sheet as a lower sheet, using a second sheet as an upper sheet, and riveting the first sheet with the second sheet at the dangerous section of the first sheet, wherein the strength of the first sheet is greater than that of the second sheet. The connection between the sheets with a greater difference in strength mechanical properties can be realized through the process. The process can also realize automatic mass production of a production line, and the application of the no rivet connection process in the field of connection of the heterogeneous sheets is greatly improved. While the lightweight of products is realized, the manufacturing cost is reduced, and the production efficiency is improved. The no rivet connection process conforms to the development concept of safety, energy conservation and environmental protection.

Description

technical field [0001] The invention relates to a rivetless connection process for heterogeneous sheet materials, which is mainly applied to the connection of sheet materials with large strength differences, such as the connection of light metals such as aluminum alloys and magnesium alloys and high-strength steels. Background technique [0002] With the continuous improvement of living standards, people's awareness of energy and environmental protection is also constantly improving, both of which depend to a large extent on the transportation industry. The automobile industry is in the center of the industrial chain, and its radiation range is very wide. Naturally, it has become a key industry for energy conservation and emission reduction. As a key technology to achieve this goal, automobile lightweight has gradually become an important label of automobile products and an important criterion for evaluating automobile quality. Among them, the application of lightweight new...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a rivetless connection process for heterogeneous sheet materials. Through this process, the connection between sheets with large differences in strength and mechanical properties can be realized, and the rivetless connection of dissimilar metal sheets can be solved. It is difficult to form a lock when using this process. The use of this process can also realize the automatic mass production of the assembly line, and improve the application of the rivetless connection process in the field of dissimilar sheet metal connection.

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