Connecting method for metal thin plate and metal thick plate

Abstract

The invention relates to a connecting method for a metal thin plate and a metal thick plate. The metal thick plate is horizontally arranged on an extrusion concave die of a hydraulic machine. An extrusion convex die fixed to a sliding block of the hydraulic machine evenly extrudes a plurality of bosses in the same size on the metal thick plate. A punch convex die is used for punching thin plate through holes with the inner diameter 0.1-1 mm lager than the outer diameter of the bosses of the thick plate in the positions, corresponding to the bosses of the thick plate, of the metal thin plate, the thin plate through holes correspond to the thick plate bosses in a one-to-one correspondence mode, and the axes of the thin plate through holes and the thick plate bosses coincide. The metal thick plate is arranged on the metal thin plate, the bosses of the thick plate are made to penetrate through the thin plate through holes, the metal thick plate and the metal thin plate are conveyed to a heading machine, heading convex dies of the heading machine are pressed downwards to flatten the bosses of the thick plate into connecting joints, the connecting joints are tightly attached to the outer surface of the metal thin plate, and therefore the metal thick plate and the metal thin plate are firmly connected together.

Description

technical field [0001] The invention relates to a method for connecting thin metal plates and thick plates. Background technique [0002] The connection structure of metal thin and thick plates is widely used in manufacturing fields such as railway transportation, ship engineering, aerospace, automobile industry, and home appliances. Welding is often used to connect metal thin and thick plates. However, compared with metal thick plates, metal thin plates have less restraint and larger deformation during welding, especially for materials with large thermal expansion coefficients such as stainless steel. The deformation is particularly serious. Deformation will seriously affect the structural strength, manufacturing accuracy and performance of thin and thick plate structures. [0003] For the connection of metal thin and thick plates, multi-point connections are usually required to ensure the connection strength. If the spot welding method is used, considering the fluctuation...

AI Technical Summary

Problems solved by technology

Metal thin and thick plates are often connected by welding, but compared with metal thick plates, metal thin plates have less restraint and larger deformation during welding, especially for some materials with large thermal expansion coefficients such as stainless steel, the deformation is particularly serious

Deformation will seriously affect the structural strength, manufacturing accuracy and performance of thin and thick plate structures

[0003] For the connection of metal thin and thick plates, multi-point connections are usually required to ensure the connection strength. If the spot welding method is used, considering the fluctuations in the thickness of the actual plate, using the same welding method parameters at different points will inevitably lead to a decrease in connection strength. For example, different points Adjusting the parameters of the method to ensure the welding strength will greatly increase the difficulty of automatic welding and reduce production efficiency

Images