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Re: Bending mild steel strip

 

Some caution about drilling holes before bending.? Due to how the metal stretches at bends, it can be a bit tricky to place the holes on a flat pattern, so they end up right after the bending.? Most sheet metal shops want to see a dimensioned drawing of the finished part and they figure out the subtleties.? So, if you can, you might be better off drilling holes after bending so you can be sure where the holes will be.

If this is causing too much grief, it is little more than a snack for a sheet metal shop with the equipment they usually have.? But you would have to pay something.? I know that these machining groups are "do it yourself" and "find a way" focused, which is great.? But sometimes for the occasional job outside the "work envelope" of our equipment, it can pay to farm it out.

Charles E. "Chuck" Kinzer

On Thursday, June 27, 2024 at 02:40:27 PM PDT, Bill in OKC too via groups.io <wmrmeyers@...> wrote:


This is the one I bought when I was remounting my wifes wheelchair lift in the new van:?

I'd managed to FUBAR a couple brackets, using the torch & vise. Bought that bender and cranked out all 4 of the new brackets in less than an hour. They have similar machines in Europe,? and there are several youtube videos about scratch-building a version of the bender.?

Bill in OKC?

William R. Meyers, MSgt, USAF(Ret.)

Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better.
Expect in one hand, expectorate in the other. See which one gets full first.



On Thursday, June 27, 2024 at 01:35:57 PM CDT, Andrei <calciu1@...> wrote:


If you are in USA, Harbor Freight sells some inexpensive tools to bend iron and steel. Check them out and maybe one of them will help you.?

Best Regards,
Andrei

mailto:calciu1@...
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From: [email protected] <[email protected]> on behalf of Carl <carl.blum@...>
Sent: Thursday, June 27, 2024 2:31 PM
To: [email protected] <[email protected]>; peter@... <peter@...>
Subject: Re: [Unimat] Bending mild steel strip
?
Hi Peter:
?
Assumption, all the same size? And you have a vise? Are the bends in the same direction? Or opposite?
Even a propane torch can help. On the 30 deg bend, a larger radius would help.?
Cut a board as a template for the bends. Drill any holes before? bending.?
?
Carl.?
On 06/27/2024 1:18 PM EDT Peter Brooks <peter@...> wrote:
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?
Apologies as this isn¡¯t Unimat (or even lathe) related - I¡¯d appreciate some advice from those who will know.

I have to make three identical ¡®legs¡¯ to support a metal shallow bowl water feature. Each leg will have two bends, and the material is 3/4¡± x 1/8¡± mild steel (18mm x 3mm approx for the metrically minded).

One bend is an easy angle, and I think I can do it in a metalworking vice. Envisaging what will happen I will clamp some pieces of wood around the free part as support so that the bend happens where it is meant to.

The other bend is trickier, as it is an acute 30 degrees¡­ Is this overly ambitious? ?I realise that the metal will fracture if - literally - pushed too far.

I don¡¯t have any equipment to heat the metal, so that is out.

A couple of ideas spring to mind as to how I might attempt it - a) clamping it with upright pieces of wood or metal in the vice (to give the clearance), or b) around a pin on a board (akin to bending steamed wood for furniture). In both cases proper supporting pieces of wood would be required to keep the bend in the right place.

Advice and suggestions would be greatly appreciated. Thanks!

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