Fault phenomenon: When changing the tool of the TH5840 vertical machining center, the spindle cone hole is blown to blow out the water molecules containing rust, and attached to the spindle cone hole and the tool shank. Poor contact between tool holder and spindle.
Analysis and processing process: TH5840 vertical machining center pneumatic control schematic diagram shown in Figure 9-5. The cause of the failure is that the compressed air contains moisture. If an air dryer is used, the problem of using compressed air after drying can be solved.
If there are no air dryers due to the conditions, you can also perform two water separation filters on the main shaft cone hole blowing line, set up an automatic water discharge device, and perform anti-rust treatment on the relevant parts in the air circuit, and the fault can be eliminated.