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.
( X# l0 Y) m8 _: l6 ^/ zNOTE:  CS=1000 ft/min for carbide insert used.
8 H3 y$ D  R. Q
4 I% M2 M0 _/ v* Sso  RPM(1)=      
    RPM(2)=
* y9 x& }& H9 ]  ~* e1 ?3 k    RPM(3)=
9 x8 {6 W7 O- \/ \5 r4 K2 ?$ U    RPM(4)=

1 z: S8 M: C4 Y( |谢谢指教。