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.
5 d* M8 r+ T/ c* j1 x9 RNOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
7 n; X% F* x0 u7 W1 N    RPM(2)=
    RPM(3)=
+ R& W- G# I- ^. Q8 M' s( @# u    RPM(4)=

谢谢指教。