Causes of spindle axis movement of NC milling machine

1. The axial movement of the spindle of the CNC milling machine cannot be ignored

The influence of the axial movement of the spindle on the machining is as follows: vibration will be generated during milling, especially when milling with the end milling cutter on the vertical CNC milling machine; The surface roughness value will increase; The size of the workpiece is not easy to control; The flatness of the machined surface is affected.

The main reasons for the axial movement of the main shaft are as follows: the clearance between the main shaft bearing and the main shaft is too large; Excessive wear of main shaft or main shaft bearing; The quality of the end face of the inspection rod is poor, and the measuring head of the dial gauge does not touch the center of the end face of the inspection rod. Corresponding measures shall be taken to solve the problem.

2. The end face circular runout of the support surface of the spindle shoulder of the NC milling machine should not be ignored

The influence of the end face circular runout of tolerance on the bearing surface of the spindle shoulder of the CNC milling machine on the machining is as follows: the milling cutter positioned and installed on this surface will produce end face runout, which will affect the service life of the cutter; It affects the accuracy and surface roughness of the machined surface of the workpiece.

The main reasons for the end face circular runout of the bearing surface of the spindle shoulder of the CNC milling machine are as follows: the clearance of the spindle bearing is too large; The end face of the main shaft shoulder has been used for a long time and is greatly worn; The manufacturing accuracy of the spindle is poor.