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)=      
) k3 F0 T! R! a, i    RPM(2)=
# M7 l6 l0 X- L# k/ n+ h    RPM(3)=
. Q' L# Q  |: \3 t! |* y, O1 V5 J. p    RPM(4)=

2 g4 a; E, t1 S9 n6 B谢谢指教。