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.
0 l+ r* h( ]! M/ jNOTE:  CS=1000 ft/min for carbide insert used.
! a5 U% _) ~/ ^" j& A/ b3 r
so  RPM(1)=      
    RPM(2)=
    RPM(3)=
1 t: b, o+ }0 ^    RPM(4)=

谢谢指教。