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.
" c% |) O" B/ G) s8 G$ Y
+ X5 a1 @- z6 y) k& Vso  RPM(1)=      
3 x' B% ]- b9 J) r$ B6 ~    RPM(2)=
    RPM(3)=
    RPM(4)=

' A9 u  O1 L& a% M0 d谢谢指教。