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.

so  RPM(1)=      
. S( ~: d, {8 E6 n* M1 l1 n3 z7 C    RPM(2)=
" g7 ^" H  W6 i# H' q6 W, M    RPM(3)=
  a4 C; O0 Q6 \4 C6 u    RPM(4)=

$ D& {7 M3 \( b3 h2 X2 b3 O( I3 C谢谢指教。