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.
+ o+ c3 u2 j; t+ O7 p* G, U, INOTE:  CS=1000 ft/min for carbide insert used.
; D& ]: _; u2 M  w
so  RPM(1)=      
) Z& t6 c4 B* O8 D) A    RPM(2)=
) V2 L- l! f/ m8 t# I3 M! P/ s/ @    RPM(3)=
    RPM(4)=

谢谢指教。