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Maintenance knowledge: how to extend the service life of laser cutting machine

by:VENTECH     2022-01-26

The main components of the laser cutting machine are the circuit system, the transmission system, the cooling system, the light source system, and the dust removal system. The main daily maintenance parts are the cooling system (to ensure the constant temperature effect), the dust removal system (to ensure the dust removal effect), the optical path system (to ensure the quality of the beam), and the transmission system (focus on ensuring normal operation). In addition, a good working environment and correct operating habits are also conducive to prolonging the service life of the equipment.

1. Cooling system maintenance

The water inside the water cooler needs to be replaced regularly, and the general replacement frequency is one week. The water quality and temperature of the circulating water directly affect the service life of the laser tube. It is recommended to use pure water or distilled water and keep the water temperature below 35°C. If you do not change the water for a long time, it is easy to form scale, which will block the waterway, so you must change the water regularly.

Second, keep the water flowing at all times. The cooling water is responsible for taking away the heat generated by the laser tube. The higher the water temperature, the lower the light output power (15-20℃ water temperature is better); when the water is cut off, the tube end will burst due to the heat in the laser cavity, and even damage the laser power supply . Therefore, it is necessary to check whether the cooling water is unblocked at any time. When the water pipe has a hard bend (dead bend) or falls off, and the water pump fails, it must be repaired in time to avoid power drop or even equipment damage.

2. Maintenance of dust removal system

After the fan is used for a long time, a lot of dust will accumulate in it, which will affect the exhaust and deodorization effect, and also produce noise. When the fan is found to have insufficient suction power and poor smoke exhaust, first turn off the power, remove the air inlet and outlet pipes on the fan, remove the dust inside, and then turn the fan upside down and flip the fan blades inside until it is clean. Then install the fan. Fan maintenance cycle: about one month.

After the machine has been working for a period of time, a layer of ash will stick to the surface of the lens due to the working environment, thereby reducing the reflectivity of the reflective lens and the transmittance of the lens, and ultimately affecting the working power of the laser. At this time, use absorbent cotton dipped in ethanol to wipe carefully along the center to the edge of the lens. The lens should be wiped gently, and the surface coating should not be damaged; the wiping process should be handled gently to prevent falling; when installing the focusing lens, be sure to keep the concave surface down. In addition, the use of ultra-high-speed piercing should be minimized at ordinary times, and the use of conventional piercing can prolong the service life of the focusing lens.

Four. Transmission system maintenance

Smoke and dust will be generated during the long-term cutting process of the equipment, and the fine dust will enter the equipment through the dust cover, and then adhere to the rail rack. Long-term accumulation will increase the wear of the rail rack. Rack guide rails are relatively precise accessories. Large amounts of dust are deposited on the surfaces of guide rails and linear shafts for a long time, which has a great impact on the processing accuracy of the equipment, and will form corrosion spots on the surface of the linear shafts of the guide rails, shortening the service life of the equipment. Therefore, in order to ensure the normal and stable operation of the equipment and ensure the processing quality of the products, it is necessary to carefully do the daily maintenance of the guide rails and linear shafts, and regularly perform dust removal and cleaning. After cleaning the dust, grease the rack and lubricate the guide rail with lubricating oil. Each bearing should also be oiled regularly, so as to maintain flexible driving, accurate machining, and prolong the service life of the machine tool.

The environment of the workshop should be kept dry and well ventilated, and the ambient temperature should be between 4℃-33℃. In summer, prevent condensation on the equipment, and protect the laser equipment from freezing in winter.

The equipment should be far away from the electrical equipment sensitive to electromagnetic interference to prevent the equipment from long-term electromagnetic interference. Stay away from the sudden large power interference from high power and strong vibration equipment. Large power interference sometimes causes the machine to malfunction. Although it is rare, it should be avoided as much as possible. Therefore, large electric welding machines, giant electric mixers, and large power transmission and transformation equipment should be kept away. Strong vibration equipment is even more self-evident, such as forging presses, vibrations caused by short-distance motor vehicles walking, etc., the obvious shaking of the ground is very detrimental to accurate engraving.

During the working process of the equipment, the operator must observe the working conditions of the equipment at any time. If an abnormal situation occurs, immediately cut off all power sources, troubleshoot the fault in time or report it to the supervisor, and actively take corresponding measures. Regularly count the use of the machine, and keep a record of each part of the laser cutting machine. If the effect is not good, replace it in time to prevent problems before they occur.

Do not process a material before it is clear whether it can be irradiated or heated by laser, so as to avoid the potential hazards of smoke and vapor and damage the laser equipment.

If you make good use of the above maintenance skills, I believe that your equipment will last longer and work more efficiently!

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