How to accept CNC machining center?

How should CNC machining center conduct acceptance? The acceptance of CNC machining center directly affects the operation of equipment manufacturers. The general factory acceptance standard is to process and test the workpiece directly. In fact, after the workpiece processing test, we can basically determine that the key parts of the CNC machining center meet the standards and have no problems in normal use. However, there are still some details. We should also pay attention to the acceptance. It is better for the manufacturer to have its own acceptance process or standard, so as to better ensure the quality and subsequent use of CNC machining center.

Performance and function inspection of NC machine tools

It is mainly to check whether the moving parts and auxiliary devices of CNC machining center have abnormal phenomena and noise during start, stop and operation, and whether the lubrication system, cooling system and fans work normally.

Machine tool performance test:

Spindle performance inspection

1. Select low, medium and high speeds. The spindle is started five times continuously, and then shut down to check the flexibility and reliability of its action. At the same time, check whether the power display on the load meter meets the requirements.
2. Manual data input and input can gradually increase the spindle from low speed to the maximum allowable speed. Check whether the rotating speed is normal. Generally, the allowable error shall not exceed 10%. Check the spindle speed at the same time. Observe whether the noise, vibration and temperature rise of the main shaft are normal. After high-speed operation for 2h, the temperature rise of main shaft is 15 “C
3. In order to check the flexibility and reliability of spindle action, the spindle can be stopped for more than 5 times continuously.

Mechanical zero point check

1. The reliability check of the soft and hard limit of the vertical machining center machine tool. The soft limit is generally determined by the system parameters, and the soft limit reliability can be completed by checking the system parameters. The hard limit is determined by the travel switch set at the limit position of each feed shaft, and the reliability of the hard limit is determined by the reliability of the travel switch.
2. Check the reliability and accuracy of zero return by returning to the original point, and check the zero return performance of each feed shaft.

Inspection of feed shaft

1. Manually operate the low, medium and high-speed feeding and rapid movement of each feed shaft to check whether the movement proportion is correct, whether the movement is stable and whether there is noise.
2. Manual data input mode (MDI) operation can detect whether the rapid movement and feed speed are normal through goo and gol command functions.

Inspection of tool change device

Carry out tool exchange step by step manually. Check whether the actions such as grasping, loading and pulling are accurate and appropriate. During the adjustment of CNC machining center, the calibration inspection method is used for inspection. In case of error, the stroke of the manipulator, the support of the manipulator or the position of the tool magazine can be adjusted.

ken. tang@chengcg.com