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.
! ^1 ]3 E2 ^' C5 QNOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
    RPM(2)=
4 g0 n) P8 S) f7 H    RPM(3)=
    RPM(4)=

6 R. N% H3 V  k5 t7 S9 P谢谢指教。