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1, the workpiece scale is accurate, poor surface finish
Cause: cutter tip damage, not sharp; machine resonance, placement is not smooth; machine has a creeping phenomenon; processing technology is not good.
Solution: the tool wear or damage after the sharpness, then re-sharpening or picking a better tool to re-knife; machine resonance or placement is not smooth, adjust the level, lay the foundation, fixed smooth; mechanical creeping causes drag Plate rail wear fierce, screw ball wear or loose, the machine should pay attention to maintenance, after work should be cleaned wire, and timely lubricants to reduce the conflict; select the appropriate workpiece processing of the coolant, can reach the processing requirements of other processes Case, try to use a higher spindle speed.
2, the workpiece occurred taper size of the first phenomenon
Cause: the level of placement of the machine did not adjust well, a high and one low, the occurrence of uneven placement; turning long axis, the dedication of information is relatively hard, knife knife is relatively deep, the formation of the knife phenomenon; tailstock thimble and spindle different heart.
Solution: Use the level to adjust the level of the machine, lay a solid foundation, the machine fixed to improve its patience; select a reasonable process and the appropriate cutting feed to prevent the tool force to the knife; adjust the tailstock.
3, the drive phase light is normal, and the processing of the workpiece scale when the big and small
Cause: The machine tray is running at a high speed for a long time, resulting in wear of the screw and the bearing. The repeatability of the tool holder is erroneously applied for a long time. The carriage can be returned to the starting point every time, but the workpiece size is still changed The This phenomenon is generally caused by the spindle, the spindle of high-speed rolling so that the bearing wear and tear, resulting in changes in processing scale. Metal processing WeChat, the content is good, worthy of attention.
Solution: with a dial indicator at the bottom of the knife, together through the system to amend a fixed cycle program, see the carriage of the repeated positioning accuracy, adjust the screw gap, replace the bearing; with a dial indicator to see the repeat position of the knife positioning accuracy, Adjust the machine or replace the tool holder; with a dial indicator to detect the workpiece after the exact return to the program starting point, if possible, then repair the spindle, replace the bearing.
