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.
# ~- F* V4 ?2 b" E" |4 hNOTE:  CS=1000 ft/min for carbide insert used.
9 ]; p% b/ C$ k, ?+ \
so  RPM(1)=      
* V# d# {! [) H. N    RPM(2)=
( R* E/ r( H* j+ O' A1 X( N    RPM(3)=
    RPM(4)=

谢谢指教。