The geometric Angle of NC turning and milling compound machine tool is mainly considered
When turning a slender shaft, due to the poor rigidity of the workpiece, several shapes of the turning tool have obvious influence on the vibration of the workpiece. The following points are mainly considered in the reasonable choice of geometric Angle of the CNC turning and milling compound machine tool:
(1) Due to the poor rigidity of the slender shaft, the smaller the radial cutting force is required to reduce the bending of the slender shaft. The main deflection Angle of the tool of the turn-milling compound machine tool is the main factor affecting the radial cutting force, so the main deflection Angle of the turning tool should be increased as far as possible without affecting the tool strength. The main deflection Angle of the turning tool is K =80. -93.
(2) In order to reduce cutting force and cutting heat, a larger front Angle should be selected, y. Is equal to 15. Minus 30.
(3) The front of the turning tool should be ground with R1 5 ~ mmm chip breaking groove, so that the chip smoothly crimp and break.
(4) Select positive edge Angle, ^. Is equal to 3. Make the chip flow to the surface to be processed, and make the chip rolling effect is good.
(5) The surface roughness of the cutting edge is required in R. 0. 4 headlands below, and always keep sharp.
(6) In order to reduce the radial cutting force, the turn-milling compound machine should choose a smaller radius of the arc (r. < 0.3mm). The width of chamfering should also be selected as small, and the width of chamfering should be 6, -=05, (, is the feed amount).
