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.
NOTE:  CS=1000 ft/min for carbide insert used.

# |) N6 A: f% f# m; O$ Iso  RPM(1)=      
    RPM(2)=
  ^) q  \( ]' A- C5 Q6 S3 M: Y    RPM(3)=
) H( b! U2 g9 C2 \& [5 e0 B    RPM(4)=
- C. e$ }% x6 R6 |4 m
谢谢指教。