What are the common faults and solutions of laser welding machines?

When using a laser welding machine, there will be some failure problems that will affect the working efficiency of the laser welding machine. So what are the common faults of laser welding machines? What is the specific solution?

Fault 1. Cracks appear when the laser welding machine is welding
Cause analysis and solution: keep the cleanliness of the workpiece; when the fit gap of the workpiece is too large or has burrs, the machining accuracy of the workpiece should be improved; the cooling speed of the workpiece is too fast, the cooling water temperature should be adjusted on the fixture to increase the water temperature; the protective gas If the flow rate is too large, it can be solved by reducing the shielding gas flow rate.

Fault two, laser welding machine welding depth is not enough
Reason analysis and solution: Insufficient laser energy can increase the pulse width and current; the focus lens is not correct, and the focus amount and close focus position should be adjusted.

Fault 3. The weld seam is very black when the laser welding machine is welding
Cause analysis and solution: The direction of the protective gas flow is incorrect, and the direction of the protective gas flow should be opposite to that of the workpiece.

Fault 4. The flame becomes weaker when the laser welding machine is welding
Cause analysis and solution: The focusing lens or laser resonator film is damaged or polluted, and should be replaced or cleaned in time; The laser does not output from the center of the copper nozzle under the focusing head, adjust the 45° reflective diaphragm to make the laser output from the center of the nozzle; Main optical path laser deviation, main optical path total reflection and semi-reflection aperture adjustment, photo paper detection, dot adjustment; cooling water pollution or long-term non-replacement of cooling water, replacement of cooling water and cleaning of ultraviolet glass tubes and xenon lamps can all be resolved.

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