Laser output system and welding method for simultaneously welding multiple intensive points

Abstract

The invention relates to the technical field of laser welding, in particular to a laser output system and a welding method for simultaneously welding multiple intensive points. The laser output systemcomprises multiple light paths arranged in parallel, wherein each light path comprises a laser light source, a transmission fiber, a cylindrical mirror group and a wedge-shaped mirror; the multiple paralleled light paths form a convergence light path after passing through the wedge-shaped mirrors; each cylindrical mirror group comprises a Y-directional cylindrical mirror group and an X-directional cylindrical mirror group; each Y-directional cylindrical mirror group comprises a Y-directional plano-convex cylindrical mirror and a Y-directional plano-concave cylindrical mirror; each X-directional cylindrical mirror group comprises an X-directional plano-convex cylindrical mirror and an X-directional plano-concave cylindrical mirror; each cylindrical mirror group adjusts a laser beam in an Xdirection and a Y direction so as to form an elliptical beam; and the elliptical beams are converged through the wedge-shaped mirrors so as to form a working laser for welding the multiple intensivepoints. The invention provides the system for simultaneously welding the multiple points so as to be capable of simultaneously realizing setting of different welding pad sizes, different welding pad gaps and different welding point powers on the same equipment, and the system has higher efficiency and processing accuracy.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a laser output system and a welding method for intensive multi-point simultaneous welding. Background technique [0002] With the rapid development of science and technology in the electronics industry, electronic products are becoming thinner and smaller, and the requirements for the dimensional accuracy of electronic components are getting higher and higher, and the connector industry is also bearing the brunt. The size of the new-generation USB Type C connector is smaller, the distance between the solder pins is smaller, and the soldering process is becoming more and more complicated. Traditional soldering methods are difficult to meet the requirements of soldering efficiency and yield. Due to the small size and dense pitch of the pads, the traditional soldering iron soldering process is usually impossible to complete. The thermocompression welding method can quickly co...

AI Technical Summary

Problems solved by technology

However, the usual laser welding process uses semiconductor laser single-beam single-point irradiation, which can only irradiate one pad at a time, and the welding efficiency is too low

In addition, because the size of the pads on the same product is usually different, it is difficult for a single light source to take into account the effective soldering of pads of different shapes and sizes

Using multiple laser light sources to irradiate at the same time can significantly improve the welding efficiency, but because of the poor quality of the semiconductor laser beam and the large divergence angle, there are difficulties in spatial arrangement in the design of dense multi-spot spots

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