Tell me about precision machining and the techniques you should know for batch part processing

Tell me about precision machining and the techniques you should know for batch part processing

When CNC machine tools perform batch machining of precision mechanical parts, special attention should be paid to machining accuracy. What issues should we pay attention to when batch machining to ensure accuracy? Below, we, Tianyao Metal Group, will introduce to you from the following three aspects:

1、 The poor machining accuracy of batch parts is generally due to the feed dynamics between each axis not being adjusted according to the error during installation and adjustment, or due to wear and tear during use, the transmission chains of each axis of the machine tool have changed. I want to learn UG programming and collect UG data from the QQ group. It can be resolved by readjusting and modifying the gap compensation amount.

When the dynamic tracking error is too large and an alarm is triggered, it can be checked whether the servo motor speed is too high. Is the position detection component in good condition. Check if the position feedback cable connector is in good contact. Whether the corresponding analog output latch and gain potentiometer are in good condition. Is the corresponding servo drive device functioning properly.

2、 Overadjustment during machine tool movement may cause poor machining accuracy, possibly due to short acceleration and deceleration times. The speed change time can be appropriately extended. It is also possible that the connection between the servo motor and the screw is loose or the rigidity is too poor, and the gain of the position ring can be appropriately reduced.

3、 Roundness deviation during two axis linkage

(1) Axial deformation of a circle

This deformation may be caused by mechanical misalignment. Poor positioning accuracy of the shaft or improper compensation of the screw clearance can lead to roundness errors when exceeding the limit.

(2) Oblique ellipse error

At this point, the position deviation values 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 the rotary transformer or induction synchronizer is properly adjusted, and then check whether the mechanical transmission pair clearance is too large and whether the clearance compensation is appropriate.

CNC programming:

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Precision machining