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.
! ~% I/ R0 v2 c0 \' d) uNOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
    RPM(2)=
$ `, z; K- x* l/ A    RPM(3)=
7 z0 Z5 F1 {( S+ }+ t    RPM(4)=
$ B' u- }. ~1 `/ k0 j- m
谢谢指教。