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.
% \% C. ~; N3 P4 H, aNOTE:  CS=1000 ft/min for carbide insert used.

! }1 n0 u6 j9 x8 ]5 y: F! Wso  RPM(1)=      
) [, D5 F! n* J7 ]    RPM(2)=
3 K9 D5 D( }7 ?* Q* C    RPM(3)=
    RPM(4)=

谢谢指教。