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.

so  RPM(1)=      
    RPM(2)=
$ F# s: j2 @+ p) C" f* Q    RPM(3)=
    RPM(4)=
: g0 c% G; F4 G0 I4 }( T
谢谢指教。