1. Machining discontinuous surfaces can lead to intermittent cutting, such as machining various grooves and root cleaning. In classical turning, this operation can produce an impact load that is not conducive to machining, resulting in poor machining surface quality and early tool wear. In turn milling compound machining, the tool used is milling cutter, and milling itself is intermittent cutting in the periodic change of load.
2. When the processed material is long chip material. In turning, chip forming is difficult to deal with; It is not so easy to find a suitable chip breaking groove for the turning tool. The milling cutter used in turn milling compound machining produces short chips, which significantly improves the control of chips.
3. Taking the machining of crankshaft and spindle with eccentric journal as an example, in turning, the eccentric quality of workpieces such as crankshaft journal and eccentric cam can lead to the generation of unbalanced force, which has an adverse impact on the machining, while the turning milling compound machining avoids such negative impact due to the low rotation speed of workpieces.
