How to prevent major failures of various parts of CNC machine tools

1. Failure of the spindle component

Common faults include: automatic tensioning of the tool holder device, automatic transmission failure, and unstable spindle motion accuracy.

2. Applause in the feed chain

The fault is generally manifested by a decrease in the quality of the movement. For example, the positioning precision decreases, the backlash increases, the table creeps during the feed motion, and the bearing noise is too large. This type of fault generally removes the pre-tightening force of the motion pair, adjusts the loose link, and adjusts the compensation link to discharge the fault.

3. Failure of automatic tool changer (ATC)

The failure of the device accounts for about 50%, which is manifested in: movement failure of the tool magazine; excessive positioning error; unstable mechanical clamping of the tool holder, excessive movement error of the robot, which will cause the tool change to be stuck and the whole machine to stop running. .

4. Position switch pressing fault for position detection

The main factors affecting the normal press-fit of the travel switch are the change of the moving characteristics of the moving parts. The reliability of the mechanical device of the press-fit switch and the quality characteristics of the travel switch itself are eliminated by adjusting or replacing the components.

5. Failure of accessory accessories

The accessory accessories are faults such as cutting fluid, chip removal device, guide rail protection, and spindle cooling temperature control box.

The handling of mechanical faults is rather cumbersome. It takes a lot of effort to dismantle and unload. Therefore, maintenance personnel must be able to ask the mechanics for help when they have more than 90% of the diagnosis, especially in the truth. The experiment can be disassembled after necessary analysis of the fault phenomenon. Easy blind disassembly is not allowed.