Fusion
I am starting my first project with 1018 steel making talon jaws. I tested feeds & speeds on the same material running a simple straight line tool path. I used these speeds/feeds to run the part. The top slot & threaded holes worked perfectly. I am stumbling on the simple pockets for the screws. For larger pocket, the top one, I used the same 15 imp and .020 WOC that I used when I tested the F&S. Since the pilot hole that the endmill drops into is .375", I calculated the reduced feed rate as (.375-.25)/.375 x the feed rate of 15 imp = 5 ipm
For the smaller hole, since the tool holder blocks much of the ability of the fog buster to get mist lubrication into the hole, I planned on using a slower base feed rate of 10.5 imp with a resulting reduced feed rate of 3.5 imp.
I just started running this project and when the endmill dropped into the pilot hole with a feed rate of 5 imp, it began squealing and vibrating. Am I calculating the reduced feed rate improperly?
Richard
