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Do you know the Machining Skills of Precision Machinery?

Jul. 27, 2020

When CNC machine tools are processing precision mechanical parts in batches, special attention should be paid to the accuracy of the processing. To ensure the accuracy, what issues should we pay attention to when processing in batches? Below, our Custom Aluminum Milling Parts Factory will introduce to you from the following three aspects:

Precision CNC Machined Parts

Precision CNC Machined Parts

1. Poor machining accuracy of batch parts is generally due to the fact that the feed dynamics between the axes are not adjusted properly according to the error during installation and adjustment, or the transmission chain of each axis of the machine tool has changed after wear. It can be solved by readjusting and modifying the clearance compensation amount.

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

2. The machining accuracy is not good due to overshoot when the machine is in motion. The acceleration and deceleration time may be too short, and the speed change time can be appropriately extended. It may also be that the connection between the servo motor and the lead screw is loose or the rigidity is too poor, and the gain of the position loop can be appropriately reduced.

Three, the roundness of the two-axis linkage is out of tolerance

(1) Axial deformation of circle

This deformation may be caused by improperly adjusted machinery. Poor positioning accuracy of the shaft or improper compensation of the screw gap will cause roundness errors when crossing the quadrant.

(2) Oblique ellipse error

At this time, check the position deviation value of each axis first. If the deviation is too large, adjust the position loop gain to eliminate it. Then check whether the interface board of the resolver or induction synchronizer is adjusted well, and then check whether the gap of the mechanical transmission pair is too large and whether the gap compensation is appropriate.

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