Numerical control machine tools in batch processing precision mechanical parts, especially to pay attention to the accuracy of processing, to ensure the accuracy of batch processing, what problems should we pay attention to?

1、 The poor machining accuracy of batch parts is generally due to the failure to adjust the feed dynamics between the shafts according to the error during installation and adjustment, or the change of the transmission chain of each shaft of the machine tool due to wear and tear, which can be solved by readjusting and modifying the clearance compensation.

When the dynamic tracking error is too large and gives an alarm, it can check whether the speed of servo motor is too high. Whether the position detection element is in good condition. Whether the position feedback cable connector is in good contact. Whether the corresponding analog output latch and gain potentiometer are in good condition. Whether the corresponding servo drive is normal.

2、 When the machine tool is moving, the overshoot causes poor machining accuracy, which may be that the acceleration and deceleration time is too short, so the speed change time can be appropriately extended. It is also possible that the connection between the servo motor and the lead screw is loose or the rigidity is too poor, so the gain of the position ring can be reduced appropriately.

3、 Roundness out of tolerance in two axis linkage

(1) Axial deformation of the circle, which may be caused by the mechanical adjustment. If the positioning accuracy of the shaft is not good or the clearance compensation of the lead screw is improper, the roundness error will occur when the image limit is over.

(2) In this case, the position deviation of each axis should be checked first. If the deviation is too large, the position loop gain can be adjusted to eliminate it. Then check whether the interface board of resolver or inductosyn is adjusted well, and check whether the clearance of mechanical transmission pair is too large, and whether the clearance compensation is appropriate.