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.
" D& Y! P; e* h8 S- X3 iNOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
! ?' n# m* v. P2 K: B6 _    RPM(2)=
    RPM(3)=
    RPM(4)=
! s6 i( r/ P2 Z; r
/ b# d% {. x, x: }) n谢谢指教。