A new type of laser shock spot welding device and method thereof

Abstract

The invention discloses a novel laser impact spot welding device and a novel laser impact spot welding method. The novel laser impact spot welding device comprises a laser transmitting system, a welding system and a control system; the welding system comprises a workpiece system, a heating device, a direct-current electric field device, a workpiece pushing device and a working platform device. According to the novel laser impact spot welding device, the flying distance of a flying plate can be controlled precisely by changing the thickness of a gasket; the flying plate and a base plate are placed in the direct-current electric field to achieve a reinforcing effect on plasmas produced by welding, so that greater welding force can be provided; the self-sealing performance of the device disclosed by the invention is good, and the base plate and the flying plate can be heated simultaneously, so that the welding strength can be enhanced and the production of rebounding areas during a welding process can be reduced; therefore, a welding joint with higher quality can be obtained.

Description

technical field The invention relates to the field of high-speed impact welding, in particular to a novel laser impact spot welding device and welding method. Background technique In recent years, with the rapid development of industries such as microelectronics, medical devices, and precision instruments, metal sheet connections have become more and more widely used in the manufacture and assembly of micro devices. The research on the welding process of metal sheets related to it has become a research hotspot. Among them, laser shock welding has become a novel high-speed impact welding technology because of its characteristics of seldom heat-affected zone and intermetallic compounds after welding. It has unique technical advantages in connection, and has very broad application prospects in the manufacture and assembly of micro devices. The patent with the publication number of CN 106238912A introduces a laser shock spot welding device and its method, which can realize the...

AI Technical Summary

Problems solved by technology

However, laser high-speed impact welding as a traditional single energy field also has some shortcomings.

For example (1) due to the limitation of laser power, there is an upper limit for the welding force of impact loading, which cannot weld metal plates with greater thickness; (2) the high-speed impact welding process is very short (several to hundreds of nanoseconds can be completed), there is inevitably a certain range of springback zone at the welding interface, which greatly affects the welding quality

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