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.

. d9 d6 r: L( z+ S% z4 T- Q( eso  RPM(1)=      
+ P/ {7 a% {$ E3 D    RPM(2)=
/ x( i9 s4 I5 X1 j$ i- O/ b+ N; J    RPM(3)=
' K( s% r% Z9 i& q4 k    RPM(4)=
; N) _5 k: u' F- ^) X+ k
0 d+ }  A4 }' t* I% K谢谢指教。