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.

  Z0 ~5 H' R. `2 Z' y  m6 Jso  RPM(1)=      
  f3 w* o5 o2 [    RPM(2)=
/ W/ k2 n  g6 ~" u9 h' B& c    RPM(3)=
    RPM(4)=
! ~1 B; m6 h0 ^$ m6 d
谢谢指教。