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.
- N8 t) F7 \, o$ a# eNOTE:  CS=1000 ft/min for carbide insert used.
# d) K4 b2 @* ^$ k3 T0 X
so  RPM(1)=      
    RPM(2)=
    RPM(3)=
# o( e9 o0 ]+ n  J# {    RPM(4)=

谢谢指教。