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.
" s' n- }7 e: y7 qNOTE:  CS=1000 ft/min for carbide insert used.

# }" H: w7 ?2 jso  RPM(1)=      
    RPM(2)=
- J# m: s. F: ?1 M    RPM(3)=
    RPM(4)=
. y5 f, V5 X* Z) }
6 u- E: l+ {0 f& t7 f+ r, ]谢谢指教。