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.
* r4 V- L. Q0 W8 P! ]NOTE:  CS=1000 ft/min for carbide insert used.
* R  U+ Y5 s* Y" N
* R7 E) j2 v! d$ x0 B6 l  {( ~so  RPM(1)=      
    RPM(2)=
    RPM(3)=
: V, x$ _* d+ m1 E4 Y3 ]    RPM(4)=

谢谢指教。