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.

3 g! L& c6 `+ Sso  RPM(1)=      
0 Z2 s  W+ p" L+ B! R    RPM(2)=
    RPM(3)=
7 m6 c+ w& l4 H$ f1 S( u+ Q    RPM(4)=

! g, _+ s" _/ o. g+ _; \1 _5 L谢谢指教。