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.
" l: k/ x* U) d  S5 Q$ F% r8 [. ]- cNOTE:  CS=1000 ft/min for carbide insert used.

0 o9 U' [" J1 D9 @so  RPM(1)=      
6 Q9 \' E% u% y6 d, @    RPM(2)=
  T/ W7 l4 c! o4 @$ Z" p    RPM(3)=
* J1 u# {7 q8 `) L% p* q/ s    RPM(4)=

7 C- J# V1 q3 g0 `谢谢指教。