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.
( N) Q% n. Y0 ]& g. b- ?+ C
so  RPM(1)=      
: F, l1 j" S' M& T4 J) }    RPM(2)=
5 X9 R; Q: X/ g/ W. m7 z    RPM(3)=
$ o& Y( d8 `( g6 N% j. E3 f" D+ a    RPM(4)=
/ n. h. E  U0 v, g6 [- @& ~
谢谢指教。