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.
1 e- D# e" l3 x
- l$ Z! c9 ]/ ~5 O- u/ Fso  RPM(1)=      
% B7 m8 I% k9 G& \    RPM(2)=
& d5 v+ D4 j2 L0 M: b    RPM(3)=
    RPM(4)=
  \  O) F$ b6 B7 X5 M' B
* x. A0 s9 p# B, i* ]0 |谢谢指教。