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.
+ W' d5 o5 R7 ~, ?NOTE:  CS=1000 ft/min for carbide insert used.

( H! a) |5 f7 Qso  RPM(1)=      
; d: n+ u+ w; W    RPM(2)=
    RPM(3)=
    RPM(4)=

$ F+ Q( T+ f' v$ G( c谢谢指教。