(1) Due to the poor stiffness of the thin shaft, in order to reduce the bending of the thin shaft, the smaller the radial cutting force, the better. The entering angle of the turning and milling compound machine tool is the main factor affecting the radial cutting force. Increase the entering angle of the tool as much as possible without affecting the strength of the tool. The main declination angle of the turning tool is K, =80.
(2) In order to reduce the cutting force and cutting heat, a larger rake angle should be selected, taking y. =15.130.
(3) A chip breaker of R15~mmm should be ground before the turning tool, so that the chips can be curled and broken smoothly.
(4) Select positive edge inclination, ^. =3. Make the chips flow to the surface to be machined, so that the chip curling effect is good.
(5) The surface roughness of the cutting edge is required to be R. 04 and below and often stay sharp.
(6) In order to reduce the radial cutting force, the turning and milling compound machine tool should choose a smaller arc radius (r.0.3mm). The width of chamfering should also be small, the width of chamfering should be 6-=05