CNC machine tool commissioning

CNC machine tool is a kind of machine tool with high technical content. When the user buys a CNC machine tool, it is a key step to start the machine correctly and safely. The correctness of this step determines whether the CNC machine can play its normal economic efficiency and its own service life in a large program. This is a major issue for the production plants and user factories of CNC machine tools. When the CNC machine is turned on, the commissioning should be carried out according to the following steps.

1 visual inspection before power-on

Check the machine tool electrical appliance to open the machine tool control box, check the relay, contactor, fuse, servo motor speed, control unit socket, spindle motor speed control unit socket, etc., if there is loose, should return to normal state, with locking mechanism The connector must be locked. The machine with the transfer box must check the socket on the transfer box, the wiring is loose, and the locking mechanism must be locked. CNC electric box check to open the CNC electric box door, check all kinds of interface sockets, servo motor feedback line socket, spindle pulse generator socket, manual pulse generator socket, CRT socket, etc. If you have loose, you need to re-plug it, there is locking The organization must be locked. Check the setting of the short-circuit terminal on each printed circuit board according to the instruction manual, and it must conform to the state set by the machine tool manufacturer. If it is wrong, it should be reset. Under normal circumstances, it is not necessary to reset it, but the user must set the short-circuit terminal. The status is the original record. Wiring quality check Check all wiring terminals. Including the terminals of the strong and weak parts of the machine tool factory at the time of assembly and the terminals of the power lines of each motor, each terminal must be tightened once with a screwdriver until it is screwed with the screwdriver, each motor socket must be Tighten. Solenoid Valve check all solenoid valves must be pushed by hand several times to prevent malfunction caused by non-energization for a long time. If abnormality is found, make a record to confirm repair or replacement after power-on. The limit switch checks and checks whether the flexibility and fixing of the limited position switch are firm. If it is found that the operation is poor or the fixing is not strong, it should be dealt with immediately. Buttons and switches Check the buttons and switches on the operation panel, check all the buttons, switches, and indicators on the operation panel. If any errors are found, they should be processed immediately. Check the sockets and wiring on the CRT unit. The ground wire inspection requires a good ground wire. The grounding resistance of the machine tool should not be greater than 1 Ω. Power phase sequence check Use the phase sequence table to check the phase sequence of the input power supply. Verify that the phase sequence of the input power supply is absolutely consistent with the phase sequence of the power supply calibrated everywhere on the machine.

Equipment with secondary wiring, such as power transformers, must confirm the consistency of the phase sequence of the secondary wiring. Make sure that the phase sequence is absolutely correct. At this point, the power supply voltage should be measured and recorded.

2 machine tool total voltage is connected

Turn on the main power supply of the machine, check the CNC electric box, the cooling motor of the spindle motor, the steering of the cooling fan of the machine tool box is correct, the oil mark indication at the lubrication, hydraulic pressure, etc., and whether the machine light is normal, whether the fuses are damaged, such as If there is an abnormality, it should be immediately shut down for maintenance, and no abnormality can continue. Measure the voltage of each part of the high voltage, especially the primary and secondary voltages of the power transformer for the CNC and servo unit, and make a record. Observe the oil leakage, especially the Hydraulic Cylinder and solenoid valve for the turret indexing, clamping, spindle shifting and chuck clamping. If there is any oil leakage, it should be repaired or replaced immediately.

3CNC electric box power

Press the CNC power-on button to turn on the CNC power and observe the CRT display until the normal screen appears. If the ALARM display appears, you should look for the fault and eliminate it. In this case, you should re-send the power check. Turn on the CNC power supply and measure the voltage of each level according to the position of the test terminal given in the relevant data. The deviation should be adjusted to the given value and recorded. Put the status switch in the appropriate position, such as the Japanese FANUC system should be placed in the MDI state, select the parameter page. The parameters are checked one by one, and these parameters should be consistent with the random parameter list. If there are inconsistent parameters, the meaning of each parameter should be clarified before deciding whether to modify it. For example, the value of backlash compensation may be inconsistent with the parameter table, which can be modified at any time after actual processing. Place the state selection switch at the JOG position, place the jog speed at the lowest position, perform the jog operation in the forward and reverse directions of each coordinate, and simultaneously press the overtravel protection switch corresponding to the jog direction to verify its protection. The reliability is then followed by a slow overtravel test to verify the correctness of the overtravel block installation. Put the status switch to the zero return position, complete the zero return operation, and the other operations cannot be performed if the action returned by the reference point is not completed. Therefore, in this case, you should perform this operation first, and then proceed to the fourth operation. Put the status switch in the JOG position or MDI position, perform the manual shift test. After the verification, set the spindle speed switch to the lowest position, and perform the spindle forward and reverse test of each gear to observe the spindle running condition and the correctness of the speed display. Then gradually increase the speed to the maximum speed and observe the stability of the spindle operation. Perform manual rail lubrication test to make the guide rails well lubricated. Gradually change the rapid shift overshoot switch and the feedrate override switch, and jog the tool holder at random to observe the correctness of the speed change.

4MDI test

Measure the actual spindle speed and put the machine lock switch in the on position. Use the manual data input command to perform any spindle shift, speed test, measure the actual spindle speed, and observe the spindle speed display value. The error should be limited to 5%. within. The purpose of the knife selection test of the turret or the holder is to check the correctness of the holder or the positive, reverse and positioning accuracy. The function test is different depending on the order of the order, and the function can be tested according to the specific situation. In order to prevent accidents, it is best to lock the machine for testing before releasing the machine for testing. EDIT function test puts the state selection switch in the EDIT position, and compiles a simple program by itself, including as many function commands and auxiliary function commands as possible. The moving size is limited to the maximum stroke of the machine, and the program is added, deleted and modified. . The automatic state test locks the machine tool, performs the dry running test with the programmed program, verifies the correctness of the program, and then releases the machine tool to make various changes to the feedrate override switch, the quick overshoot switch, and the spindle speed overshoot switch. The machine tool is fully operated under various changes of the above switches, and then the overshoot switches are placed at 100% to fully operate the machine tool and observe whether the working condition of the whole machine is normal.

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Label: CNC machine tool commissioning

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