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.

8 o3 w0 I; a; `$ t, @so  RPM(1)=      
    RPM(2)=
3 z* @* r; i0 c    RPM(3)=
9 C- e* [( \: P& O6 [. D5 b    RPM(4)=
" \; M6 q  ?, }
谢谢指教。