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.
+ a2 {4 g1 ?& d# t$ qNOTE:  CS=1000 ft/min for carbide insert used.
' G' a, I- A" P! h, g4 A% t3 I
so  RPM(1)=      
    RPM(2)=
    RPM(3)=
$ V+ I9 }9 ^) p" h; a* C    RPM(4)=
7 Y+ c! y0 k8 O- a0 Z4 n
% l- N, i. g' Q, W5 G# i谢谢指教。