A method for connecting steel sheets and die castings

Abstract

The invention provides a method of connecting a steel sheet with a die-casting member. The method includes the steps of (A) making a steel sheet of the required size and a connecting through hole for matching in the steel sheet; (B) making a die-casting member of the required size, wherein the connection portion corresponding to the connecting through hole in the steel sheet, of the die-casting member is not provided with a hole; (C) accurately placing the steel sheet on the die-casting member and aligning the connecting through hole in the steel sheet to the corresponding connection portion of the die-casting member; (D) aligning a cylindrical concave punch to the through hole in the steel sheet, applying some punching pressure to the cylindrical concave punch, enabling the die-casting member to conduct local plastic deformation in the direction opposite to the punching pressure, filling the through hole in the steel sheet with the deformed portion of the die-casting member, and enabling the deformed portion of the die-casting member to be in interference fit with the through hole in the steel sheet. The method of connecting the steel sheet with the die-casting member can reduce the processes and workload, save production time, improve the connection strength and reduce production costs.

Description

technical field [0001] The invention relates to the technical field of metal parts processing, in particular to a method for connecting steel sheets and die castings. Background technique [0002] The traditional method of connection between die-casting plates and stainless steel sheets of mobile phones is assembled and connected by riveting. The riveting process is: (1) Drilling or punching at the connecting part of the body (mobile phone die-casting plate); (2) Deburring the drilled holes; (3) Precisely placing the stainless steel sheet; (4) Insert rivets into the connection part; (5) Rivet the connection part between the die-casting plate of the mobile phone and the stainless steel sheet through the riveting equipment. [0003] The riveting connection method between the mobile phone die-casting plate and the stainless steel sheet has the following deficiencies: [0004] (1) A series of preliminary preparations for riveting are cumbersome and time-consuming, resulting in...

AI Technical Summary

Problems solved by technology

[0004] (1) A series of preliminary preparations for riveting are cumbersome and time-consuming, resulting in increased production costs. For example, the riveting process of a single mobile phone die-casting plate takes about 1 minute, and the production batch of such products is huge, so through riveting Process connection is a waste of time;

[0005] (2) The connection is not tight. The connection hole of the die-casting plate of the mobile phone is small, and the improper design of the fit clearance, rivet length and diameter, and riveting pressure will cause the connection between the die-casting plate and the stainless steel sheet to be loose and affect the quality of the connection. ;

[0006] (3) It is not conducive to the lightweight design of mobile phones. Many rivet connections are required to ensure the connection strength between the die-casting plate and the stainless steel sheet through rivet connection. This connection process is contrary to the trend of lightweight design of mobile phones today.

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