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.
9 p: [1 F4 d: I3 }- w; c+ X
5 T8 n! V; i9 l* X1 aso  RPM(1)=      
+ n: O# t5 B. y: F7 t9 `$ P    RPM(2)=
    RPM(3)=
2 l; Z1 c$ z. ^+ a* i2 o    RPM(4)=

0 v3 [; B- b+ ~* }- M谢谢指教。