Flux [featherweight]

[plargen]

Re: Flux [featherweight]

i know you could probably bend it bk with a hammer if it was mild or stainless steel but never really used hardox so don't really know how easy it would be to hammer bk

[maddox10]

Re: Flux [featherweight]

Why the 2 beads on the inside of the curve?

And forget hammering. You need a serious press for that.

[typhoon_driver]

Re: Flux [featherweight]

A half hour to cut new panels and weld them up, no bother

[ewan]

Re: Flux [featherweight]

It's made from three strip sections welded together hence the degree of distortion as the welds run along the whole length. CAD'ing up a version for laser cutting now which will involve some slotting and perpendicular support to stop it happening again, don't really want to half-ass it given the money that's gone into it so far.

[maddox10]

Re: Flux [featherweight]

Pity about the hardox.

If you heat it up that much, it will lose toughness and hardness. I fear the 2 panels are now a good grade of mild steel, and can be hammered back in shape.

Unless the welding is rubbish, and the lack of heat imput didn't ruin the qualities.

In any case, I see several options to get the stuff in shape. Unfortunatly, long distance doesn't work.

[ewan]

Re: Flux [featherweight]

Ah, I was following the logic that I should get as much penetration as possible to ensure the welds were as strong as the Hardox itself, but that seems redundant if I'm weakening it in the process. Am I best off doing short welds at a couple of points along each length then do you reckon? That with some support brackets behind shouldn't create so much heat

[ewan]

Re: Flux [featherweight]

Found this which goes into detail on the issue http://www.acme.pwr.wroc.pl/repository/218/online.pdf

Looks like I'll be relying on some behind-bracketing to provide the structural strength and positioning instead of long welds and so minimise heat damage to the exposed areas.

[maddox10]

Re: Flux [featherweight]

Not welding it at all.

If you need an angled shape, bend it with a d10 radius at minimum. Still need a serious press.

Or if welded, keep the heat at a minimum, cool everything down with heatsinks and wet rags.



In my case, I do weld hardox. But only with TIG, highest amp setting and highest speed as possible, with 1.4571 welding wire, adding serious supports and clamps to retain the shape, and getting rid of the heat as fast as I can. Excess Argon, backing gas, and so on.

[Mouldy]

Re: Flux [featherweight]

Ewan- try a local engineering firm, they should be able to just whack it in a press and bend it without to much trouble, just make sure you tell them it will spring back a fair bit so they'll have to over bend it... or ask Ed Wallace really nicely... i used his press and gilotine to do 540's front end on some parts... others i just scored with a grinder and welded em back up once id bent them by hand