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, cutting dosage selection is too large, worm turning tool longitudinal front angle is too large, improper selection of cutting fluid 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 stabbing. Once the tool is tied, the light damage to the tool, scrap the workpiece, the heavy damage to the machine tool, it should try to prevent.
Precision parts processing incorrect tooth shape mainly in the sharpening and installation of the turning tool. For example, the turning tool tip angle is not corrected; turning tool tip and the center of the workpiece is not equal height; tool tip angle parallels are not perpendicular to the workpiece axis; fine turning is not based on the worm form according to the requirements of the correct tooling. 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 gear tooth side in turning will make the surface quality decline.