Quality problems easily occurred in multi head worm powerful cutting in precision parts machining
In the process of machining precision parts, the main reason for the phenomenon of tool binding in turning is that the workpiece moves due to insecure clamping, resulting in an increase in cutting amount. In addition, poor elasticity of turning tool shank, excessive selection of cutting parameters, too large longitudinal rake angle of worm turning tool, improper selection of cutting fluid or work hardening affecting cutting due to blunt cutting edge of turning tool may also cause tool binding. In case of tool binding, it may damage the turning tool and scrap the workpiece, or it may damage the machine tool, so it should be prevented as much as possible.
Incorrect tooth profile In the processing of precision parts, the incorrect tooth profile is mainly due to the grinding and installation of turning tools. For example, the sharp angle of turning tool is not corrected; Unequal height between turning tool tip and workpiece center; The tool tip angle bisector is not perpendicular to the workpiece axis; The cutter is not installed correctly according to the worm form and requirements during fine turning. In addition, the wear of the turning tool will also affect the correctness of the tooth profile.
Vibration caused by poor surface quality and insufficient rigidity of cutter bar; The turning tool is blunt or damaged; Poor rigidity of workpiece and improper selection of cutting parameters; During rough machining, the borrowing amount is too large to be corrected; Insufficient margin in finishing stage; Improper selection of cutting fluid; The surface quality of worm tooth will be degraded if there is chip buildup or chip roughening in turning.