Welding method for melting metal powder by laser scanning and device thereof

Abstract

The invention discloses a welding method for melting metal powder by laser scanning and a device of the welding method for melting metal powder by laser scanning, and is mainly applied to fine welding of foil lattice structures. According to the invention, based on laser free moulding manufacturing theory, the foil is integrated below a metal powder layer, and the metal powder and the foil are melted so that the metal powder and the foil are connected to form a lattice structure. The method comprises the steps of forming an adjustable focusing light spot by a laser beam focusing by the effect of a dynamic focusing unit and a galvanometric scanner by adopting a high power density and high beam quality laser; controlling and designing a scanning path by using a computer; and finally melting the metal foil and a metal powder layer by laser scanning to weld and mould the metal foil and the metal powder layer. The device consists of an optical laser, the dynamic focusing unit, the galvanometric scanner, the computer, a clamp, a powder welding cylinder, a powder lifting cylinder and the like. According to the welding method for melting metal powder by laser scanning and the device of the welding method for melting metal powder by laser scanning provided by the invention, the laser beam model adopted is good, the welding precision is high, and the range of application is wide.

Description

technical field [0001] The invention relates to the field of foil parts welding, in particular to a laser scanning melting metal powder welding method and a device thereof. Background technique [0002] Currently, there are three main types of commonly used welding techniques for joining large lattice structures: (1) arc welding, (2) resistance welding, and (3) laser heat conduction welding. [0003] Electric arc welding is the most widely used welding method in industrial production. Its principle is to use the heat generated by arc discharge to melt the electrode and the workpiece and form a weld after condensation to obtain a strong joint. . [0004] Arc welding uses manual manipulation of electrodes for welding, and can perform multi-position welding such as flat welding, vertical welding, horizontal welding, and overhead welding. In addition, because the electrode arc welding equipment is portable and flexible in handling, it can be said that the electrode arc welding...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the shortcomings and deficiencies of the above-mentioned prior art, provide a laser scanning melting metal powder welding method and its device, overcome the traditional welding method that can only weld thicker connection materials and the high temperature during welding will cause foil Defects such as part deformation, melting through, poor connection, etc.

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