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.
* U/ J. L# h0 Q  d& q8 ?" Z. g
% R% e. o  S) l5 Xso  RPM(1)=      
  ?. L" |) ^+ p# _  x& C3 m    RPM(2)=
. p. S( Y8 E2 Q3 _; E1 {/ p7 H    RPM(3)=
    RPM(4)=

谢谢指教。