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.
$ P# i! ?; D1 V' t  sNOTE:  CS=1000 ft/min for carbide insert used.
$ G/ C. }! ^: J& i
so  RPM(1)=      
  c* a$ u7 n* s: ?    RPM(2)=
! R) _- E2 o" j, z    RPM(3)=
7 ?  D3 s5 Z4 h# g    RPM(4)=

谢谢指教。