Todays Project - What did you do today?

[dallen]

(01-23-2014, 03:23 PM)PixMan Wrote:

(01-23-2014, 02:36 PM)dallen Wrote: needed to put a radius on all four corners of a piece of flat bar so I made this cutter to do the job with, it could of been a little deeper but it worked for what I needed to do.

Nice job!

Me, I would have simply used a corner rounding cutter (I have a set of inch sized HSS ones from 1/16" to 1/2") and milled both sides of the full radius with it.

How did you get clearance angles behind the cutting edge (if there's any there)?

I would of done the same thing except that I don't have a corner rounding bit with a 5/32 radius.

I used a hex 5C collet block and made three cuts into the drill rod 120 degrees apart then I rotated it a small amount and cut the leading edges, then I went back and recut the relief on the backside of the leading edge, heated it up with a mapp torch and quenched in crisco, didn't want to use lard as it would make it fat like the shop monster, Crisco doesn't stink up the house like motor oil does.

It worked and I only had to make one part which I can finish if i ever figure out the height of blocks I need to stick in the sine vise to get the angle I need for the last cut on the part.

now where did I put the protractor at last time I used it

DAA