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.
* D4 W- t* J8 N. b) d: m" G
so  RPM(1)=      
" z( y% h2 C  n. |& I) g    RPM(2)=
    RPM(3)=
- C; B1 b/ a3 t2 E    RPM(4)=
% M. ^& F- A1 f0 E5 O- j6 s* f
谢谢指教。