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.
! m* A! ~- b# F% W& y* ?  _2 f: s
. e" o% j$ S  n( g5 ?9 gso  RPM(1)=      
( p( ~( Q* i/ C& e    RPM(2)=
. `9 j  X2 [$ d$ D    RPM(3)=
  d8 t4 I+ W* n    RPM(4)=

& C$ P0 l* a- B8 g8 J) K* r8 I谢谢指教。