In the process of precision parts processing turning appeared zapping phenomenon The main reason for the phenomenon of zapping is: the workpiece clamping is not secure and walking, resulting in an increase in cutting volume.
In addition, poor flexibility of the turning tool shank, the cutting dosage selection is too large, worm turning tool longitudinal front angle is too large, the cutting fluid is not properly selected or due to the cutting edge of the turning tool grinding dull and the emergence of hardening affects the cutting into, etc., may also cause a tool. Once the tool is tied, light damage to the tool, scrap the workpiece, heavy damage to the machine tool, it should try to prevent
Incorrect tooth shape in precision parts machining is mainly in the sharpening and installation of the turning tool. For example, the turning tool tip angle is not corrected; the turning tool tip and the workpiece center is not equal height; the tool tip angle bisector is not perpendicular to the axis of the workpiece; not according to the form of worm when finishing according to the requirements of the correct loading tool. In addition, the wear of the turning tool will also affect the correctness of the tooth shape.
Poor surface quality Vibration caused by insufficient rigidity of the toolholder; dull or damaged turning tool; poor rigidity of the workpiece and improper selection of cutting amount; excessive borrowing amount during rough machining and cannot be corrected; insufficient margin in the finishing stage; improper selection of cutting fluid; chip tumor or chip pulling worm tooth side in turning will make the surface quality decline.