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.

+ A) O% a1 A4 M6 h; E$ Y4 c5 [so  RPM(1)=      
    RPM(2)=
6 B% J5 v7 W# Y+ d4 d% K    RPM(3)=
( w$ R5 k1 z" Z3 t& H; m' u6 q6 b    RPM(4)=

! _% C) ^' J. O+ T3 n' ?3 H5 J1 I谢谢指教。