A laser synchronous welding process and device

Abstract

The invention provides a synchronous laser welding process and device and relates to the technical field of laser welding. After a product base and a product lens are attached through a movable lower mold and a fixed upper mold, a laser beam emitted by a laser source is processed through a light guide pipe made of cheap materials such as transparent objects and then penetrates through the product lens to be irradiated to a welding area of the product base, and then the welding area is heated rapidly and evenly; at the same time, a welding air cylinder is used for press fit of the product base and the product lens, so that the product base and the product lens are welded together in a press fit mode under the fusion state. In the welding process, defects such as powder are not generated, and the height H and width w of the waste edge size generated by welding both range from 0 mm to 0.4 mm, so that the performance of welded products are effectively improved.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a laser synchronous welding process and device. Background technique [0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. It is mainly used for welding thin-walled materials and low-speed welding. Because the welding process is heat conduction, that is, the laser radiation heats the surface of the workpiece, and the surface heat passes through Heat conduction spreads to the inside, and by controlling parameters such as laser pulse width, energy, peak power and repetition frequency, the workpiece can be melted to form a specific molten pool. [0003] At present, in the welding process of plastic headlights or rear lights in the automotive lighting industry, the laser welding process is generally used to weld between objects, but in practical applications, it is found that in the current laser welding p...

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Problems solved by technology

[0003] At present, in the welding process of plastic headlights or rear lights in the automotive lighting industry, the laser welding process is generally used to weld between objects, but in practical applications, it is found that in the current laser welding process, the welding ribs The welding state is unstable, and since the laser beam is reflected by the whole body vibrating mirror to the object to be welded during welding, and the object to be welded is mostly irregular shapes such as curved surfaces and angles, it will cause defects such as reflections when the laser generator is irradiated. In turn, the energy of the laser is partially reflected, that is, the energy of the laser cannot be fully concentrated on the object to be welded (the laser emitting end face is no longer welded by the normal of the weld); thus resulting in unstable welding

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