Laser welding technology as a laser processing technology, with the rapid development of intelligent technology products in the automotive industry and people's needs continue to improve. The principle of laser welding is the laser beam issued by the laser generator, focusing on the welding wire surface heating, so that the welding wire is heated and melted, filling the gap between the steel plate joints, the formation of welded seams to ultimately achieve a good connection.
With the frequency of use is too high, the corresponding failure will also increase more. In order to make the laser welding machine work better, reduce the number of failures, increase its efficiency, we must understand the process of its operation should pay attention to the problems and failures in the treatment method.

First, the laser welding machine cracks when welding

(1) the flow of protective gas is too large, can reduce the flow of protective gas to solve.

(2) the cooling speed of the workpiece is too fast, you should adjust the temperature of the cooling water on the fixture to improve the water temperature.

(3) the workpiece is not clean, encounter this situation need to re-clean the workpiece.

(4) the fit gap between the workpiece is too large or burr, you should improve the machining accuracy of the workpiece.

Second, the laser welding machine welding depth is not enough

(1) laser energy is not enough, can improve the pulse width, improve the current to solve.

(2) focusing mirror out of focus is not the right amount, should adjust the amount of out of focus to close to the focal point of the position (but can not have spatter produced).

Third, the laser welding machine welding laser beam weakening

(1) cooling water pollution or long-term cooling water has not been replaced, replace the cooling water and clean the ultraviolet filter glass tube and xenon lamp can be solved.

(2) focusing lens or laser resonant cavity diaphragm damage or pollution, should be replaced or cleaned in a timely manner.

(3) the main optical path laser offset, adjust the main optical path full reverse and half reverse diaphragm, the use of like paper inspection and rounding spot.

(4) the laser is not from the focusing head below the centre of the copper air nozzle output, adjust the 45-degree reflection diaphragm, so that the laser from the centre of the air nozzle output.

(5) the light gate is not fully pop-up, check and add lubricant on the light gate connectors, so that the connectors can be mechanically smooth.