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.
6 _# Y, U! U' R; k7 x6 WNOTE:  CS=1000 ft/min for carbide insert used.

2 I/ }$ N( a5 A8 T9 V2 Hso  RPM(1)=      
    RPM(2)=
3 k- z: J8 I  h# c& a4 X    RPM(3)=
    RPM(4)=
& z) O1 K- k8 y8 m! T' r% j' Y
: V! ]  G$ S2 R1 S8 u8 y8 C+ P谢谢指教。