The laser of laser welding machine has biological effects (ripening effect, light effect, pressure effect and electromagnetic field effect) just like ordinary light. While this biological effect brings benefits to human beings, it will also cause direct or indirect damage to human tissues such as eyes, skin and nervous system if it is unprotected or poorly protected. In order to ensure the safety and protection during laser welding, the laser hazard must be strictly controlled, and the engineering control, personal protection and safety management must be well done.

1. Engineering control: engineering control refers to the safety measures taken on the structure of the laser or laser processing system, mainly including: protective cover - to prevent workers from receiving more than the allowable exposure; Safety interlock - refers to the automatic device connected with the protective cover, which can avoid radiation when the protective cover is removed; Safety optical path - the optical path that may cause combustion or secondary radiation due to irradiation shall be closed; Key switch - generally refers to the laser turning when the key is removed; Beam Termination In order that the laser beam does not extend beyond the controlled processing area, a beam terminator or attenuator may be used.

2. Personal protection: mainly refers to wearing fire-resistant and heat-resistant laser protective clothing, wearing laser protective glasses that can selectively attenuate specific laser wavelengths, wearing laser protective masks for ultraviolet laser sources, and wearing laser protective gloves that can avoid damage caused by direct or scattered lasers.

3. Safety management: safety management mainly includes setting up special institutions or personnel, defining responsibilities and rights: including safety training and supervision

Dimming skills and precautions of laser welding machine

1. Before adjusting the output mirror, the collecting cavity with the YAG rod should be removed to avoid the influence of the refractive deviation of the YAG rod in the optical path on the accuracy of the adjustment. The accurate position of the output medium diaphragm should be the exit perforation that makes the red light in its center position and can completely reflect the red light back to the red light, otherwise it should be carefully adjusted through the knob of the diaphragm holder. Note that after the adjustment, the locking ring on the diaphragm holder adjusting knob should be fully locked to ensure the stability of its position, and then check again whether its reflected light position remains in place.

2. Check the installation position of YAG rod. Paste transparent adhesive tape on both ends of the YAG rod sleeve, and observe whether the red light spot is in the middle of the two rod sleeves. If there is any deviation, it should be corrected by adjusting the position of the concentrator. Then observe the position of the reflected light of the YAG rod, which should coincide with the exit perforation of the red light. Otherwise, adjust the position of the concentrating cavity on the premise of keeping the red light at the center of the rod casing as much as possible, so that the reflected light is as close to the exit perforation as possible, and at least ensure that the deviation from the exit perforation is less than 1mm.

3. Check the position of the shutter. Manually rotate the reflector bracket, push the shutter to the light blocking position, and observe whether the red light is in the middle of the lens, and whether the reflected light is on the absorption cone at the center of the beam terminator. If the position is incorrect, slightly adjust it.