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How to maintain fiber laser welding machine to prolong service life

I believe we are all the same, and we all want to use the machine we purchased for a little longer. Two bosses went to a shop the same day to buy the same two fiber Laser welding machines. After a few years, when the A boss's machine is still in normal use, the owner of B’s machine can no longer be used. B’s boss is puzzled and asks A boss why his own machine is no longer usable. Does the machine seem to be the same as the new one? A boss asked, do you regularly maintain the machine? B boss said no. This is the same fiber laser welding machine, the difference between maintenance and maintenance, then, how should we maintain and maintain the fiber laser welding machine, in order to allow the machine to use longer?

The daily use and maintenance of the laser welding machine must be carried out by specially trained personnel, otherwise it is easy to cause serious man-made damage. In the maintenance process, we also need to pay attention to the following six points:

A) The purity of the cooling water is the key to ensure the laser output efficiency of the welding torch and the life of the laser concentrator assembly. During the use, the conductivity of the internal circulating water should be checked once a week to ensure that the conductivity of the circulating water is 30.5 MW?cm. It must be replaced once a month. For the deionized water in the internal circulation, the conductivity of the newly injected pure water must be 32MW?cm. Observe the color change of the ion exchange column in the cooling system at any time. Once the color of the resin in the exchange column is changed to dark brown or even black, replace the resin immediately;

b) In the environment where the temperature is relatively high or relatively humid, the "condensing" phenomenon caused by the low water temperature should be observed during the running of the torch laser at any time to observe the cooling water circulating pipe or the laser condenser cavity. The appearance of “condensation” will cause damage to the YAG crystal's end surface, resulting in a drop in output power or even no light. Attention must be paid during use. If “condensing” occurs, the use of the laser welding machine should be stopped immediately. After the moisture on the surface of the condenser cavity is naturally dried, check the condition of the YAG optical surface to determine whether to clean the YAG rod. Check all normal conditions before turning it on again. Before starting up, pay attention to adjust the lower limit setting temperature of the high temperature controller. During normal operation, attention should also be paid to observing frost on the titanium tubes of the refrigeration system. If frost occurs, it may be due to insufficient freon in the refrigeration system. Immediately ask relevant professionals to supplement and check for leaks.

c) Put the multimeter in the 2MW resistance file, and insert the exposed metal parts of the two pens at the measuring distance of 1cm into the cooling water surface in parallel. The resistance reading at this time should be at least greater than 250kW. If the reading is lower than this value, the torch cooling water should be replaced immediately;

d) In order to ensure that the welding torch laser is always in normal working condition, after two weeks of continuous operation or when it is stopped for a period of time, the components in the optical path such as YAG rods, dielectric diaphragms, and lens protection glasses shall be inspected before startup to determine each The optical components do not have any abnormal phenomena such as dust pollution or mildew. If any of the above phenomena should be dealt with in time, ensure that the optical components will not be damaged by strong laser light;

V) The equipment operator can often check the output spot of the laser with a black image paper. Once phenomena such as non-uniform spot or energy drop are found, the resonant cavity of the torch laser should be adjusted in time to ensure the beam quality of the laser output.

VI) Inspection welding torch protection chain circuit Stainless steel welding rod: The cooling system is designed for the characteristics of laser equipment, designed over-temperature sound alarm, over-temperature chain, flow switch chain, liquid level protection chain and other protective measures. Always check the above protection circuit during use to ensure that its function is normal and effective. Inspection work can be carried out when changing water.


  • 2021-10-08
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Contact: Yousheng Fang

Phone: 13751052375

Tel: 0755-27388711

Email: szsunlaser@163.com

Add: Floor 5, Building B, Dingfeng Science and Technology Park, Songgang Tantou 5th Industrial Zone, Baoan District, Shenzhen, China.