CNC题目,再请教。

27149

A 6.5 inch dia shaft is to be machined on a TURNING CTR to 4.5 inch dia in 4 equal cuts. If CONSTANT CS is selected calculate the RPM at the beginning of each cut.
3 q: c$ {: D8 ?8 Z/ i: RNOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
: z. ~0 _! l- [, ]. j    RPM(2)=
    RPM(3)=
    RPM(4)=
7 B/ c& _$ }  U/ D* d' t
. Y9 j! S, f$ v谢谢指教。