1. Daily inspection and maintenance of machine tools
a. Carefully check the pressure of the working gas and cutting gas of the laser before starting up every day. If the gas pressure is insufficient, replace it in time.
b. Check whether the x-axis zero point, Y-axis zero point, z-axis zero point, laser preparation status and other buttons are damaged (check the indicator light).
c. Check whether the zero points of x-axis, Y-axis and z-axis, limit switches and mounting screws of striker are loose, and whether the limit switches of each axis are sensitive.
d. Check whether the circulating water level in the chiller is sufficient. If it is insufficient, it must be added in time.
e. Check whether there is leakage in the circulating water path of the external optical path, and deal with the leakage in time, otherwise the service life of the optical lens will be affected.
f. After cutting every day, check whether the focus lens is damaged.
g. Check whether the telescopic leather cavity of the external optical path is burnt or damaged.
h. After the daily work is completed, the cutting waste shall be cleaned in time, and the work site shall be cleaned to keep the work site neat and clean. At the same time, do a good job in cleaning the equipment to ensure that all parts of the equipment are clean and free of dirt, and no sundries can be placed in all parts of the equipment.
j. After daily work, open the drain valve of the air reservoir at the bottom of the air compressor for drainage, and close the drain valve after the waste water is discharged.
k. After daily work, shut down the machine according to the shutdown steps, and then turn off the main power supply of the whole machine tool.
2. Weekly and irregular maintenance of machine tools
a. Regularly clean the sundries at the exhaust outlet to ensure the exhaust effect.
b. Regularly check the filter in the air circuit and timely remove the accumulated water and sundries in the filter.
c. Regularly check whether the screws of travel switch bracket and striker bracket are loose.
d. The dust on the filter screen of the ventilator of the electric control cabinet shall be cleaned in time to ensure good ventilation, so as to facilitate the heat dissipation of internal electrical components.
e. Clean the body and guide rail in time to protect the sundries in the leather cavity so as not to damage the guide rail, thus extending the service life of the guide rail.
f. After the machine tool is installed and used for a period of time, the level of the machine tool should be readjusted to ensure the cutting accuracy of the machine tool
g. Every other week, the lubrication oil filling of x-axis guide rail and lead screw, Y-axis guide rail and lead screw, z-axis guide rail and lead screw must be checked to maintain the lubrication of all moving parts and prolong the service life of X, y, z-axis guide rail and lead screw.
h. Depending on the environment of the workshop, check the contamination of the surface of the reflecting mirror and focusing mirror irregularly (at least once a month), and clean the optical lens in time to ensure its service life.
3. Maintenance of optical lens of external optical path of machine tool
a. Do not touch the surface of optical lens (mirror, focus lens, etc.) directly with your hands, as it is easy to cause scratches on the mirror surface. If there is oil stain or dust on the mirror, which will seriously affect the use of the lens, the lens should be cleaned in time.
b. It is forbidden to use water and detergent to clean optical lenses. The surface of the lens is coated with a special film. If these films are used to clean the lens, the surface of the lens will be damaged.
c. Do not place the lens in a dark and humid place, as this will cause the lens surface to age.
d. The surface of the lens is stained with dust, dirt or water vapor, which is easy to absorb laser and cause damage to the lens coating; It may affect the quality of the laser beam, or it may cause no laser beam.
e. When the lens is damaged, contact Han's laser after-sales service department for repair in time. Try not to use the damaged lens, otherwise it will accelerate the damage of the repairable lens.
f. Don't use too much pressure when installing or replacing the reflector or focusing lens, otherwise the lens will be deformed and the beam quality will be affected.
4. Methods of installing or replacing optical lenses
a. Before installing the optical lens, pay attention to: wear clean, clean your hands with soap or detergent, and wear white clean and light gloves; Do not touch the lens with any part of your hand; When taking the lens, wear gloves and take it from the side of the lens. Do not touch the coated surface of the lens directly.
b. When assembling the lens, do not blow air into the lens; The lens should be placed on a clean table stably, and several lens papers should be placed under it. Care shall be taken when removing the lens to prevent bruises and falls, and no force shall be applied on the coating surface of the lens; The lens base where the lens is installed shall be clean. Clean the dust and dirt in the lens base with a clean air spray gun. Then, take out the lens and gently put it into the lens base. c. When installing the lens to the lens base, do not use too much force to fix the lens, so as to avoid lens deformation, which will affect the quality of the beam.
d. Precautions when replacing optical lenses: be very careful when taking out the lenses from the packaging box to prevent damage to the lenses; Do not apply any pressure on the lens before the wrapping paper is opened; When taking out the mirror and focus lens from the packaging box, wear clean gloves and take them from the side of the lens; When removing the packaging paper on the lens, avoid dust and other objects falling on the lens; After taking out the lens, remove the dust on the mirror with a spray gun, and then put the lens on the special paper for optical lens; Remove the dust and dirt on the lens support frame and fixed frame, and avoid other foreign matters falling on the lens during assembly; When installing the lens on the lens base, do not use excessive force to avoid lens deformation; After the lens is assembled, clean the dust and foreign matters on the lens again with a clean air spray gun.
5. Steps to clean the lens
Different lenses have different cleaning methods. When the mirror surface is flat and has no mirror base, use lens paper to clean, for example, the mirror; When the mirror surface is curved or the mirror surface has a mirror base, a cotton swab shall be used for cleaning, such as cleaning the focusing lens.
a. The steps of cleaning the lens with lens paper: blow off the dust on the lens surface with a blowing balloon; Clean the surface of the lens with alcohol or lens paper. Do not drag dry lens paper directly on the mirror surface. Instead, place the lens paper flat on the surface of the lens, drop 2-3 drops of high-purity alcohol or high-purity acetone, slowly pull out the lens paper horizontally toward the operator, and repeat the above operations several times until the mirror surface is clean; If the mirror is very dirty, fold the lens paper in half for 2-3 times, and repeat the above steps until the mirror is clean.
b. Steps of cleaning the lens with cotton swabs: first blow off the dust on the mirror surface with a spray gun; Then remove the dirt with a clean cotton swab; Use a new cotton swab stained with high-purity alcohol or acetone to move in a circle from the center of the lens to scrub the lens. After each week of wiping, change another clean cotton swab and repeat the above operations until the lens is clean. Never use the used cotton swab to operate; Clean the lens with a clean cloth, remove the residual marks on the mirror, and be careful not to scratch the mirror; Take the cleaned lens to a place with sufficient light for observation. If the reflection of the lens is good, it indicates that the lens has been cleaned. If the reflection of the lens is not good, continue to clean the lens; Place the cleaned lens on the lens base according to the method described above.
6. Daily maintenance of laser
The laser should be maintained before daily startup.
1) Inspection of laser working gas and cutting gas: check the gas cylinder of laser working gas
2) Check that the cooling water pressure is kept between 3.5 and 5bar.
3) Check the temperature of the cooling water, and the water temperature required by the selected laser is preferred.
4) Check the oil level in the laser vacuum pump. If it is not enough, add it.
5) Check whether there is leakage in the oil, water and gas circuits of the laser, and whether there is leakage in the vacuum pump, pneumatic components and pipe joints of the resonator.
7. Weekly maintenance of laser
1) Check whether there is oil and water in the gas mixing unit of the laser. If so, clean it in time
Li; Check the laser gas drying filter. If more than 1 / 4 of the color changes to red or white, it needs to be replaced. Its normal color is blue.
2) Check the oil level of vacuum pump and rozz pump. If it is not enough, add it.
3) Check the filter of the chiller for impurities.
4) Check the laser cooling water circuit for impurities.
5) Check the condensate water level in the compressed air separator (located in the air source unit). Check the oil level of the vacuum pump (under the air supply unit). When the pump is in cold state, the oil level should be between + 5mm-0mm of the middle line of the oil window, and refuel when necessary.
Check the oil level of roots pump
The oil level in the gearbox of roots pump can be seen through the oil window on the end face of the gearbox. When the pump is turned off and in the cold state, the oil level should be between + 5mm and 0mm of the middle line of the glass. If necessary, add htcl2100 oil
8. Half yearly maintenance of laser (or after 2000 hours of operation)
1) Check whether the cooling water pipeline of the laser head of the laser is corroded. If so, deal with or replace the pipeline in time.
2) Check whether the excitation power tank leaks oil.
3) Check whether the high-voltage cable is damaged.
4) Check and clean the inside of the laser resonator and all the lenses, including the front window mirror, the tail mirror and the reflection mirror.
5) After the internal lens of the laser is cleaned, the light output mode of the laser shall be adjusted again until the correct mode is reached.
6) Replace the vacuum pump oil.
7) Replace the roots pump oil.
8) Carefully tighten all plugs to ensure air tightness of roots pump.
9) There is a white plastic plug on the gas split discharge at the outlet end of roots pump. Clean the plug and coat its inner surface with silicone grease. The purpose of this silicone grease is to adsorb and capture physical impurities in the circulating gas of the laser. (only silicon free high vacuum grease can be used, and the coating should be very thin.).
10. Maintenance of chiller
The chiller shall be regularly maintained to ensure that the machine is in good condition
In case of any fault, professional and technical personnel shall be invited for maintenance, and the machine shall not be disassembled by themselves.
Attention shall be paid to the following aspects in the daily maintenance of water chillers:
1) Regularly clean the fins. The cleaning method is: carefully brush the fins with a brush, and then blow them clean with compressed air. If necessary, use water to mix with special air conditioning fin cleaning agent (commonly known as dust cleaning).
2) Dust the condenser regularly (the method is the same as above).
3) Regularly check the water level in the water tank of the chiller. If the water level is too low, add purified water or deionized water in time.
4) Regularly check the wiring terminals of electrical appliances and remove dust (after power failure).
5) Regularly check whether the joint in the water system leaks water and whether the pipeline is aging. If there is water leakage, replace the relevant components in time.
6) Regularly check the water quality in the water tank of the water chiller. If the quality of the cooling water becomes poor, turbid and transparent, drain all the deteriorated cooling water in time and replace it with a new one.
7) Regularly clean the impurities on the filter element. If the filter element is damaged, it should be replaced in time. The replaced filter element must be the standard filter element required by the manufacturer.
11. Maintenance of air compressor
1) Before all maintenance operations, the air compressor must be turned off and the compressed air in the air tank must be drained;
2) Drain water 3-8 times a day (depending on the air humidity), and drain the air and water in the air tank after work;
3) Clean the air filter every half a month (shorten the cleaning cycle if the working environment is bad);
4) Replace the filter element every 1200 hours, check and clean all components, and replace the valve if necessary.
5) Grease the crankshaft bearing in the compressor head every 1000 hours of operation of the oil-free air compressor;
6) Clean the air filter every half a month (shorten the cleaning cycle if the working environment is bad);
7) Refer to the air compressor manual
12. Maintenance of cold dryer
1) Drain water 3-8 times a day (depending on the air humidity), and drain the air and water in the machine after work;
2) Clean the air filter element once a month;
3) Dust removal and cleaning of condenser fins shall be carried out once a month; 4) Replace the air filter element every six months.
13. Maintenance of regulated power supply
1) After the new regulated power supply has been running for one month, all connecting terminals in the regulator, especially the main circuit, shall be retightened after cutting off the main power supply;
2) Check the elasticity of the sliding carbon brush every three months, and blow out the carbon powder and dust adhered on the components in the regulator with dry compressed air.