| tndcorp |
11-24-2014 07:29 PM |
Proposed metal work
Quote:
Originally Posted by Richard K
(Post 106159)
Welcome, Geoff. What sort of metalwork do you have in mind?
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I will post step-by-step what I want to be my initial foray into sheet metalwork. I have a prototype in mind, and I must not be talking to the right shops, because nobody knows how to do it, nor how to instruct me to do it myself. I want to take a large disc (blanking? coining?) stamped from a large square sheet 24"x24" or so (exact diameter not important at this point). The material is 22ga SS, and I want to have a rolled edge 1/4" in diameter, but rolled in and under to 120 degrees. This precludes stamping/coining/blanking, because once you get past the 90 degree point, you would not be able to remove the piece from the die, since it will be rolled over onto it. Essentially this is a "cap", that will snap over a large round duct that has an externally rolled edge, much like those kitchen mixing bowls with the thumb ring. I was looking at a Pexto Circle cutter to make the disc out of the square blank, and for the edge I am stumped. A Rams 495 looks like it would do the job, but not with the dies it has, since the crease is too sharp, and it doesn't go past 90 degrees. I would ideally like to make this edge in one tool, but I will have to rely on others to educate me on that. Any input would be appreciated. I have a crude line drawing since I do it the stone-age way with ruler, compass, and pencil! |
