Plastic shape correcting laser welding process

Abstract

The invention relates to the technical field of plastic welding, in particular to a plastic shape correcting laser welding process. Under a certain pressure, welding faces of two welding parts are completely or partly in contact, shapes of the two welding parts are corrected, after correction, shapes, except for the gap between the two welding parts, of the two welding parts are the same with theshape of the finished product, at the vibration friction welding frequency, the welding face is subjected to vibration friction, the gap of the welding face between the two welding parts is reduced tothe required range, the part or complete welding faces are in reliable connection, a laser device is used for carrying out laser welding on the welding face, through the vibration friction manner, the welding face is subjected to surface treatment, the shape of the product is corrected, the welding surface meets the welding need, the welding face size precision is adjusted, two welding parts after vibration friction are relatively and firmly connected, laser welding is facilitated, and in the welding process, deforming will not happen.

Description

technical field [0001] The invention relates to the technical field of plastic welding, in particular to a plastic shape-correcting laser welding process. Background technique [0002] Plastic is a material with good processing properties, and with the rapid development of polymer materials, more and more products and parts are produced using plastic, which makes plastics widely used. Correspondingly, plastic welding technology is also applied more and more widely. [0003] At present, plastic welding uses more ultrasonic welding, friction welding, vibration welding, laser welding, induction welding, high frequency welding, hot air welding and hot plate welding, etc., each has its advantages and disadvantages. Among them, laser welding has the advantages of non-contact, high efficiency, high precision, beautiful weld seam, and good sealing. During the welding process, there is less resin degradation and less debris. Compared with other welding methods, the vibration stress ...

AI Technical Summary

Problems solved by technology

[0004] However, laser welding has high requirements on the dimensional accuracy of the welded parts. Generally, the dimensional error is required to be within 0.2mm. A large dimensional error or even a certain deformation occurs, which makes it impossible to directly perform laser welding on the product, and the surface quality of some welding surfaces may not meet the requirements, which also brings obstacles to laser welding