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.
# o, @5 f4 a3 m2 ?2 s7 U
  }( W. N/ n9 F6 ~, oso  RPM(1)=      
. L3 [: ~' e- b    RPM(2)=
    RPM(3)=
- ^8 K1 [7 R, n# y$ `    RPM(4)=

谢谢指教。