Anticlastic Extremism

by shelbyvision on March 2, 2009

Anticlastic forming is probably the most difficult to achieve. I think anticlastic means “making the metal do something it really doesn’t want to do” ;). For me, one of the most fun parts of what I do is devising new (preferably easier) ways to do difficult tasks. I wanted to carry the anticlastic bend to the extreme, that is, beyond 90 degrees, approaching 180 degrees. I made a two-component set of tools for this project as shown in the first picture. The forked piece (I’ll call it a “punch” for lack of a better term) is made from 1″ diameter steel, with a 1″square piece welded on. The wood piece (I’ll call it a “die” for lack of a better term, your suggestions welcome) is about 3″ square by about 5″ tall hard maple, sandwiched between two pieces of steel held together with bolts, to keep the wood from splitting.
Anticlastic Tools
The next picture shows a 6″ brass circle poised on the die. This is an experiment, and I didn’t know what shape for sure to make the metal, but I figured a circle couldn’t be too far off.
Ready to Form
I had many pictures I took of the entire process, but due to a dumb mistake they are permanently lost, so I can only show the end result. It took about five or six stages of punching and annealing to get the bend as severe as in the final form. The pictures would tell the story much better than I can, and on my second try I will photograph again, and will be able to show exactly what happens.
The next pictures shows the final shape, with much hammering in addition to the forming done with the punch and die. This will go into my collection of unfinished experimental junk, since the original flat shape was not quite correct; if I close it up, it will not have the nice plump form I wanted. Getting it this far enables me to determine the exact shape I will need to do it right.
hen1hen2

{ 4 comments… read them below or add one }

Ruta February 5, 2009 at 10:21 am

Wow! Oh to have such a great mind to even be able to envision an end result and come up with something like that – – – making your own tools is awesome too!

Jerry Fowler February 4, 2009 at 5:42 pm

Now that is a nice set of DIY stakes. I have made the metal “Y” but that wooden one looks pretty nice too. I’m sure hydraulic form would be quicker but I don’t think anything is more satisfying then hammer metal.

shelbyvision February 3, 2009 at 10:11 pm

Yes, Pat, when it comes to metal, I’m very manipulative ;).

patpruitt February 3, 2009 at 9:19 pm

whoa! That is pure metal manipulation m/

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