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.
! Y7 k5 @  _: f* u7 b. E' U2 Y3 LNOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
" _. h' l4 r) T5 y* ?! |    RPM(2)=
    RPM(3)=
) g- S8 F2 `# n' t$ b    RPM(4)=
* }5 l( O1 Z/ O
- {2 G* X. M" v谢谢指教。