Quality Control of Laser Welding Technology

Laser welding technology stands as the most advanced welding technique in the industrial processing sector today. The unique advantages of laser welding machines have earned them widespread acclaim among manufacturers. However, during actual welding operations, various issues may arise due to multiple factors. Identifying the root causes of these problems and resolving quality defects form a critical component of production process management.

First, inspect the weld quality. Weld quality inspection generally employs two methods: visual inspection and destructive testing. Visual inspection, as the name suggests, relies on personnel with extensive experience to determine whether welded products meet standards based on their expertise. However, relying solely on visual inspection is insufficient; destructive testing is necessary, which involves tearing apart the welded base material for confirmation. Additionally, tensile strength tests using a tensile testing machine can be conducted.

Second, analyze the root cause of the phenomenon. Generally, if welding defects occur, material quality may be the issue. Check material quality, replace materials, or modify the laser welding machine's waveform settings and process conditions to resolve the problem. If welding defects persist in the same section of the product, it could indicate issues with the workbench or fixtures. If burn-through or cold welds occur, inspect the stability of the welding machine or check for problems with the workbench and clamping devices.

Third, enhance welding quality management assurance. During welding, regularly test welding pressure with a pressure tester to maintain consistent pressure levels. Additionally, periodically inspect the operational status of the welding head. Additionally, current monitoring must be intensified to prevent power supply voltage fluctuations. Overheating due to laser welding machine overload reduces current output, while poor workpiece contact diminishes current flow and compromises machine performance. Beyond this, factors like workpiece thickness, coating thickness, and metal component variations must be accounted for to prevent defective welded products.