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.
  K) y0 B5 S4 f9 H! K- N1 BNOTE:  CS=1000 ft/min for carbide insert used.

) G1 T7 J# d& r- y; |so  RPM(1)=      
    RPM(2)=
5 M0 m$ b/ [- t! u! y    RPM(3)=
% R8 L, Q5 {/ d3 K- r) _# g    RPM(4)=
" `# x  |0 ~1 E5 g3 X9 R
) w" ]6 ?% z0 O+ {- z谢谢指教。