Laser Welding Process for Plastic Shape Correction

Abstract

The invention relates to the technical field of plastic welding, in particular to a laser welding process for plastic shape correction. First, all or part of the welding surfaces of two welded parts are contacted under a certain pressure, and the shapes of the two welded parts are corrected. Finally, the shape of the two weldments is the same as that of the finished product except for the gap between the two weldments, and then the vibration friction is performed on the welding surface at the frequency of vibration friction welding to reduce the welding surface between the two weldments. gap to the required range, and make part or all of the welding surface reliably connected, and then use a laser to perform laser welding on the welding surface. The present invention first performs surface treatment on the welding surface by means of vibration and friction, which can correct the shape of the product , can make the welding surface meet the welding requirements, and can also adjust the dimensional accuracy of the welding surface. After vibration and friction, the two welded parts are relatively firmly connected, which is convenient for laser welding, and the welding process will not be deformed.

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