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.
  h$ L& w- B/ A; F# U* W
so  RPM(1)=      
0 _5 z$ d  U% ^4 Q    RPM(2)=
/ u1 V  {8 S# T9 `) ~8 G; S+ J+ E' @    RPM(3)=
; L& z+ F) g# M/ }; l9 S    RPM(4)=

& Y! f, ?' @1 \; ]0 X# {- ~谢谢指教。