How To Perform Daily Maintenance Of Laser Welding Machines？

Laser Welding has become one of the important means in industrial manufacturing. Because of its extensive use, many people do not pay attention to daily maintenance, resulting in shortening machine life. Let's take a look at the maintenance and maintenance methods of laser welding today!

Precautions for daily maintenance of laser welding machines:
1. In order to ensure that the welding laser has been in a normal working state, after two consecutive weeks of continuous work or stop using it for a period of time, first respond to components in light roads such as YAG rods, medium membranes, and lens protection glass for inspection. Optical components do not have abnormalities such as dust pollution, moldy, etc. If the above phenomenon, it should be processed in time to ensure that each optical component will not be damaged under strong laser irradiation;
2. Check the stainless steel electrode of the welding torch protection chain: the cooling system is specifically designed for the characteristics of the laser equipment, and the ultra -temperature sound alarm, ultra -temperature chain, flow switch chain, liquid level protection chain and other protection measures are designed. The above protection circuit should be checked frequently during use to ensure that its functions are normal and effective. The inspection work can be performed when changing water.
3. Check the light road component. In order to ensure that the laser has been in a normal working state, after continuous work or stop using it for a period of time, first should first deal with components in light roads such as YAG rods, medium membranes, and lens protection glass for inspection. If there is pollution, it should be treated in time to ensure that each optical component will not be damaged under strong laser irradiation.
4. Check and adjust the laser resonance cavity. The device operator can often use black -like paper to check the laser output light spots. Once the light spots are found to be uneven or energy decrease, the resonance cavity of the laser should be adjusted to ensure the quality of the beam of the laser output. Debugging operators must have the common sense of laser safety protection, and we must wear dedicated laser protective glasses at work. The adjustment of the laser must be performed by specialized training, otherwise it will be damaged by other components on the light road due to laser disorders or bias.
The adjustment steps of the laser resonance cavity are as follows:
A check the benchmark light source
Red semiconductor laser is the benchmark of the entire light path and must first ensure its accuracy. Check whether the red light is parallel to the top surface of the light guide rail with a simple high degree, and on the central line between the two guide rails of the light. After adjusting, pay attention to check whether all the fastener screws have been completely tightened.
B adjust the output mirror (output medium diaphragm) location
Before adjusting the output mirror, the concentration cavity equipped with the YAG rod should be taken away to avoid the accuracy of the adjustment of adjustment due to the refraction deviation of the YAG stick in the light path.
The accurate position of the output medium membrane should be to make the red light located in the center and can completely reflect the red light back to the out of the red light, otherwise it should be carefully adjusted through the knob of the membrane shelf. Note that after the adjustment is completed, the lock ring on the membrane sheet adjustment knobs is completely locked to ensure the stability of its location, and then check whether the position of its reflected light is maintained at the original position.
C check the installation location of YAG stick
Use the transparent rubber paper to the two ends of the YAG rod, observe whether the red light spots are in the middle position of the two rods. Then observe the reflex light position of the YAG rod, which should be overlapped with the outlet hole of the red light. At least the deviation of adjustment to the outlet is less than 1mm.
D adjustment of the location of the full anti -mirror (full anti -media diaphragm) position
Step 1: Check whether the red light is in the middle position of the medium diaphragm, otherwise the installation position of the medium membrane shelf should be adjusted to the center of the medium membrane.
Step 2: The thick -tone media film shelf knob, so that the red light reflection returns the ejaculation hole.
Step 3: Turn on the laser, about 200A, the pulse width is adjusted to about 2ms, the repeated frequency is adjusted to 0Hz, and the pedal switch is stepped to make the pulse light flash. Observe the laser output, repeatedly adjust the two knobs of the membrane shelf, so that the output spots are the most round and uniform, and then gradually reduce the current to about 120A. The strongest and strongest part is concentrated in the center of optical spots.
Step 4: Check whether the laser is reunited with the red light, fix the front end of the laser output mirror and try to stay away from the position of the output mirror. If you do not coincide, you can fine -tune the output mirror and the full -mirror, so that the light spots and the red light can be reunited, and then fix the like paper in the output mirror from the laser 800 ~ 1000mm to check whether the light spots are reunited with the red light again. If it can be better, the laser is adjusted to the best state.
Step 5: Lock each adjustment knob, and check whether the light spots on the paper are good and coax with red light. Otherwise, you should be adjusted.
E Check the location of the luptia
Artificial rotation reflective lens bracket, push the lunge to the light block, observe whether the red light is in the middle of the lens, and whether the reflex light is located on the absorption cone in the center of the beam terminal. If the location is incorrect, it can be adjusted slightly. Finally Pay special attention to check whether the mount reflective lenses are cleaned, and polluting lenses will burst soon in use.
At this point, the adjustment of the laser part is completed.
5.The purity of cooling water: is the key to ensuring the output efficiency of the welding laser and the life of the laser concentration cavity component. In the use, check the conductivity of the internal circulating water once a week. Must be replaced once a month to remove ionic water. Pay attention to the color changes of the ion exchange column in the cooling system. Once you find that the color of the resin in the switching column becomes dark brown or even black, the resin should be replaced immediately;
The main content of the cooling system maintenance
The main contents of maintenance include checking the water quality of cooling water, cleaning water tanks, pipelines, and checking the protection circuit action.
In the case of frequent use, water quality must be checked once a week to ensure the quality of the cooling medium at any time. The method of checking is to place the multimeter at the 2MW resistance file, and the metal exposed part of the two tablet strokes is inserted into the cooling water parallel with a distance of 1cm. At this time, the number of resistors should be at least 250kW. If the reading is lower than this value, the cooling water should be replaced immediately.

Check the protection chain circuit
This cooling system is specifically designed for protection measures such as ultra -temperature sound alarm, ultra -temperature chain, flow switch chain, liquid level protection chain such as ultra -temperature sound alarm, over -temperature chain, traffic switch chain, liquid level protection chain. The above protection circuit should be checked frequently during use to ensure that its functions are normal and effective. (The inspection work can be performed when changing water.)
6. The equipment is cleaned. Before and after work, first clean the environment to dry and clean the ground. Clean the equipment of the YAG laser welding machine, including the outer surface of the chassis, the observation system, the work table, etc. There are no debris and clean. The protective lens needs to be kept clean.

Maintenance method of laser welding machine
1. Check easily damage and important components
The laser welding machine continues to work for about two weeks and should check easily and important components, such as checking the medium film, lens protection glass, YAG rod and other parts to determine pollution without dust impurities on the optical components. If abnormal phenomena are found It should be treated in time to avoid damage to optical components and delay normal production.
2. Check the quality of laser beam
Check the quality of the laser beams of the laser welding machine regularly. If the energy decreases or the light spots are not uniform, the light spots need to be fine -tuned and the resonance cavity of the light is needed to ensure the quality of the laser beam.
3. Cooling water pipeline
Cooling components are the key to ensuring laser efficiency and the life of the component. Regularly check the cooling water pipeline of the laser welding machine. If the condensation occurs, it should be treated in time to avoid damage to the fiber laser welding machine. Replace the internal circulation deodorized ion every month. water.
4. Check and adjust the laser resonance cavity
Equipment operators can often use black -like paper to check the laser output light spots. Once the light spots are found to be uneven or energy decline, the resonance cavity of the laser should be adjusted in time to ensure the quality of the beam of laser output.

Precautions for maintenance of laser welding machine maintenance
1. Any failure of the device should immediately cut off the power. When the equipment is not working, cover the field lens to prevent dust pollution -pollution -optic lenses, cut off the welding machine and computer power supply.
2. When the equipment works, the circuit is high -voltage. Non -personnel should not be maintained at the time of power to avoid electric shock accidents.
3. For long -term use, the dust in the air will be adsorbed on the surface of the focusing mirror on the surface of the focusing mirror, which will cause optical lenses to absorb heat and temperature to explode, reduce the power of the laser, and affect the welding effect. When the welding effect is not good, carefully check whether the surface of the focusing mirror is polluted.
4. Laser welding machine debugging must be performed by specialized training, otherwise it will be damaged by other components on the light road due to laser disorders or bias. The operator must have the common sense of laser safety protection, and we must wear special laser protective glasses at work.

Laser welding machines are not disposable devices. Daily use of laser welding machines every day to maintain maintenance of laser welding machines.

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