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.
, Y6 G# P7 D1 [6 C* z4 `/ ]- yNOTE:  CS=1000 ft/min for carbide insert used.
/ p/ K( y# W0 n% {$ y; D3 l/ Z/ m& A
  y# K# @  B; Q8 P4 yso  RPM(1)=      
    RPM(2)=
9 Q+ g3 I! _4 Z+ v. K    RPM(3)=
    RPM(4)=

谢谢指教。