In CNC numerical control, if processing aluminum parts, to maintain dimensional stability, then we need to consider the following two categories:
The first category is irresistible factors:
1. The stability of the machine tool itself. If the machine tool is not brand new or the machine tool has been processed in large quantities and has not been debugged, there may be dimensional deviations caused by the machine tool itself. The following factors cause the deviation of the machine tool itself.
Mechanical aspects: a. There is looseness between the servo motor and the lead screw. b. Wear of ball screw bearings or nuts. c. Insufficient lubrication between screw and nut. Electrical aspect: a. Servo motor failure. b. There is dirt inside the grating ruler. c. The servo amplifier is malfunctioning.
2. Thermal expansion and contraction deformation of the workpiece. The thermal expansion and contraction deformation of the workpiece after processing is unavoidable. Therefore, we should pay attention to the cooling effect during processing, and increase the frequency of on-machine measurement. At the same time, we should pay attention to the deformation of the workpiece after cooling.
