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.
9 B8 Z8 `1 Q. `+ u
# h+ L' e+ w! G  {so  RPM(1)=      
6 D/ q, R! p3 o$ b, b    RPM(2)=
    RPM(3)=
' J7 J2 z+ B, D3 z% X    RPM(4)=
+ `, F1 _. N* P+ \( E/ a5 t% T
谢谢指教。