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.
) b, T" S8 O9 [7 nNOTE:  CS=1000 ft/min for carbide insert used.

# s/ a/ @8 O) e4 K1 i; Q% b1 {  ]so  RPM(1)=      
$ y+ ^6 A2 D6 l7 Y: q) u    RPM(2)=
1 a- d0 C- @+ A+ N/ I4 w    RPM(3)=
    RPM(4)=

7 Z. J6 L# u# T5 |* w) h; A- r2 W谢谢指教。