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.
" ?* H/ G" H9 C# Z2 ]NOTE:  CS=1000 ft/min for carbide insert used.

. o6 g# k3 H; O" _) p" a0 X/ |so  RPM(1)=      
& q9 H8 ^3 W; R    RPM(2)=
9 c+ G$ g$ C6 u& O( l# k+ y    RPM(3)=
    RPM(4)=

谢谢指教。