CNC MILLING MACHINE FOR SALE

CNC milling machine maintenance and repair manual

Daily inspection

Daily inspection: when operating the machine, check the following phenomena one by one. If any abnormality is found, find out the cause immediately and then eliminate it. In case of problems that cannot be solved, please inform our company as soon as possible so as to eliminate the abnormality as soon as possible.

1.1 before startup

1) Check whether the power line, all lines, and pipe joints are damaged or in poor contact.
2) Check whether lubricating oil must be added to the oil level of the lubricating oil pump and whether the standard oil level of the worm gear box is normal for the vertical tool magazine.
3) Check whether the three-point combination is normal.
4) Check the oil pipe and joint for oil leakage.
5) Check whether the air pressure of the three-point combination is normal and whether the pressure switch is adjusted as required.
6) Check whether the cutting liquid level of the water tank needs to add cutting fluid.
7) Check whether the safety protection device is normal and reliable, and there must be no personnel in the dangerous area.
2.1 after startup
1) Check whether the temperature rise of the spindle is normal and whether there is an abnormal sound.
2) Check whether the following items of the lubricating oil pump are normal.
a. The oil supply pressure is between 3kfg / cm2-4kfg / cm2
b. Whether the consumption of lubricating oil is normal (if the consumption is too fast, the oil circuit must be checked for oil leakage).
c. Whether the working time of oil pump is normal (3-6cc / time / 5 minutes is recommended).
3) Check whether the processing program is complete.
4) Check whether the machining tool is complete.
5) Check whether the fixture has changed and whether its datum has changed.
6) Pay attention to whether the transformer produces a high temperature at any time.
7) Always put the water in the filter in the three-point combination to ensure that the gas is dry.
8) Whether the spindle blowing is normal.

1.3 after operation
1) Remove all the chips in the table, three-shaft shield, water tank, filter screen and a large shield.
2) The inner hole of the spindle must be wiped clean.
3) The chippings on the handle should be removed at any time and every 8 hours.
4) Move the three-axis to the middle of the stroke to maintain balance.
5) After applying rust-proof oil to the worktable, remove the chips.
6) After the end of the shift, the appearance of the whole machine should be cleaned once.
7) Check whether the safety doors are closed properly.
8) Check whether the power switch is off.
9) Check whether the power source switch is off.
2 regular maintenance
2.1 maintenance instructions
1) In order to ensure the safety of maintenance work, all electrical doors and shields should be closed, especially the control box and operation box.
2) It is forbidden to use an air gun or compressed air to clean the machine tool (to prevent debris and dust blowing into the bearing or slideway).
3) Before carrying out maintenance and repair work above and behind the machine tool in the protective cover, be sure to turn off the power switch on the operation panel, and then turn off the power. At the same time, hang warning signs to prevent others from turning on the machine.
2.2 daily maintenance
1) Remove the chips, dust and sundries on all exposed parts of the machine tool and fixture, and remove the chips, dust and sundries on the tool aligner or other auxiliary tools.
2) Clean the spindle bore.
3) Check whether the oil level of the lubricating oil pump needs to add new oil and whether the oil pressure is within the specified range (3-5kgf / cm2).
4) Check the oil level height of the three-point combination tank to see if new oil needs to be added.
5) Check whether the water of the filter in the three-point combination is completely discharged.
6) Check whether the air pressure of the air circuit is normal (value ≥ 6 kgf / cm2).
7) Check whether there is oil leakage in oil circuit and joint, and take appropriate treatment.
8) Clean the clamping part of each handle on the magazine.
9) Check whether the cutting fluid needs to be added and start the machine to check whether the cooling mechanism operates normally.
10) Clean exposed electrical parts and limit switches.
11) Check whether all work lights or warning lights are normal.
12) Keep the environment around the machine clean and tidy.
13) Check the breaker for excessive carbon deposition.
2.3 weekly maintenance
1) Carry out daily maintenance
2) Check the top of the spindle and other running parts for abnormal sound and damage, and clean around the spindle.
3) Check whether the origin of each axis drifts.
4) Clean the filter screen of the water tank, and add coolant when it is insufficient.
5) Clean the three-point combined filter screen.
6) Confirm whether the spindle grabbing and loosening action is smooth.
7) Confirm whether the tool change is smooth.
8) Check whether the lubrication pump works normally (3-6cc / time / 5 minutes, oil pressure 3-5kfg / cm2).
2.4 monthly maintenance
1) Carry out weekly maintenance.
2) Clean the inside of the control box, operation panel and filter screen of heat exchanger.
3) Check the level of the worktable and make sure that the anchor bolts are locked.
4) Check if the three-axis guide strip needs to be adjusted.
5) Check the function of the solenoid valve and limit switch.
6) Clean the brush of the three-axis guide rail and update it if necessary.
7) Check for poor contact when the wire connector is loose.
8) Check whether the oil circuit is unobstructed, and clean the filter screen at the joint where it is not unobstructed.
9) Check whether the interlock device and timer are normal, check whether the breaker has proper pressure and clean it.
10) Drain the cutting fluid, clean the water tank and water pipe, and then install the cutting fluid.
11) Confirm that the NC controller operates normally.
12) Grease the counterweight chain gear shaft once a month.
2.5 half-year maintenance
1) Carry out monthly maintenance
2) Clean NC unit, control unit, and machine tool.
3) Replace the lubricating oil of oil pressure system, lubricate the gearbox of vertical tool magazine and clean the inner cavity.
4) Check the back clearance of the three shafts and adjust it.
5) Check the three-axis grid amount and adjust it.
2.6 annual maintenance
1) Clean all motors.
2) Check whether the control switches on the operation panel are sensitive and normal.
3) Check that the test program runs smoothly.
4) Determine whether the counterweight chain is in normal use.
5) Remove the carbon deposit on the contacts of all disconnectors in the electrical box and wipe it clean.
3 parts replacement and maintenance
3.1 the following work should be done before replacing parts.
1) Write down the machine number.
2) Make a note of the specification and brand of the replaced parts.
3) Mark the position relationship between the part and other related parts, so as to reassemble smoothly.
3.2 maintenance precautions
1) The maintenance personnel must understand the shutdown steps and carry out the repair work after the shutdown.
2) When repairing the interior:
a. Cut off the power first;
b. If it is necessary to power on for maintenance, lock the machine first and then enter the interior;
c. Remove the chips that may trample or touch the area to prevent them from being scratched by the chips;
d. Wipe off the lubricating oil and chip liquid at the places where you may tread to prevent slipping.
3) After a new component is replaced, it is not allowed to discard the old component before confirming its normal function.
3.3 maintenance rights and responsibilities
1) Matters allowed to be handled by operators themselves:
a. Screw and sheet metal parts that affect the accuracy of machine tools.
b. Simple purchased parts, such as fuse, switch, oil circuit, pipe joint, etc.
2) Personnel with professional qualifications are required for the following maintenance work:
a. Excessive spindle runout;
b. The spindle has abnormal sound;
c. Guide screw maintenance;
d. Maintenance of three-axis transmission components (transmission seat, nut seat, screw support and bearing, etc.).
e. Tool magazine maintenance.
f. Handling of knife dropping and collision