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.
% S+ A/ P- E* a% D0 J* t4 @: a) UNOTE:  CS=1000 ft/min for carbide insert used.

- f( j+ [& i; f, f& n! Sso  RPM(1)=      
+ j  Q- m  b; z) G    RPM(2)=
    RPM(3)=
    RPM(4)=

' S7 L- R4 i. e  Q; E- l谢谢指教。