Laser spot welding method for metal panel components

Abstract

The invention relates to a laser spot welding method for metal panel components. The method comprises the following steps: selecting a laser welding machine; carrying out pre-treatment on a to-be-spot-welded lower layer metal panel with thickness of 0.8 mm to 1 mm and a to-be-spot-welded upper layer metal panel with thickness of 1 mm to 1.2 mm; carrying out fit fixation on the to-be-spot-welded lower layer metal panel and the to-be-spot-welded upper layer metal panel; carrying out laser electric welding on two layers of to-be-welded metal panels by adopting a laser spot welding manner. The laser spot welding method for metal panel components is characterized in that technological parameters of laser spot welding are as follows: laser power is 2.3 KW to 3.0 KW, spot welding time is 180 ms to 220 ms, welding speed is 12 mm / s to 16 mm / s, focal length of lens is Phi 50 *120 to Phi 50*150 mm, off-focus value: is 0 to 1 mm, and light extraction frequency is 6 Hz to 10 Hz; the laser power is enabled to rise to 100% of total power within the first 0.5 ms and kept for 8.5 ms to 9 ms, the laser spot welding work is completed, and then the laser power is fallen to zero from 100% of total power within 0.4 ms. The laser spot welding method for metal panel components has the advantages that the flat surface, small deformation, non-oxidation and no other traces of the welded metal panels can be guaranteed, and the welded metal panels are connected fixedly and reliably without punctures.

Description

technical field

[0001] The invention relates to a laser spot welding method for metal panel components. Background technique

[0002] Spot welding technology is currently the most important connection method for connecting thin plate lap joints. As a mature welding process, it is widely used in various industrial productions. There are many types of spot welding, including traditional resistance spot welding and arc spot welding, as well as laser spot welding, friction stir spot welding and composite spot welding, which have developed rapidly in recent years; laser spot welding is a new spot welding method , Compared with traditional resistance spot welding, it has its unique advantages, especially for some stainless steel thin plate welded structural parts with high performance requirements. Due to the use of laser as the heat source, the spot welding speed is fast, the precision is high, the heat input is small, and the deformation of the workpiece is small; the accessibi...

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