Today's Message Index:
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1. 04:48 AM - Re: Heating after the bend (PoconoJohn2)
2. 05:04 AM - Re: Re: Heating after the bend (Jack Philips)
3. 07:03 AM - Re: Heating after the bend (PoconoJohn2)
Message 1
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| Subject: | Re: Heating after the bend |
Hi Oscar!
Maybe you've seen this, but certainly others coming by might find this article
interesting (posted below).
Meanwhile, I did heat some of the bends with a BernzOmatic Map-Pro Hand Torch to
see what happens. I let the steel just barely start to turn red. I pulled the
torch away slowly as to not shock cool.
There's no obvious damage to the steel, which has a slight blue tinge to it and
some soot (carbon I suppose) which wipes off.
I know some builders heat steel to make it easier to bend. I assume there's no
harm done, especially at a temperature where it doesn't turn red and heated for
a brief time.
Here's the article: http://www.eaa1000.av.org/technicl/4130.htm
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=495860#495860
Message 2
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| Subject: | Re: Heating after the bend |
As long as you used the appropriate bend radius and don't see any cracking
at the bend, you're fine. If you do see cracking, post-bend heating won't
help. Just throw the cracked parts away and start over with a larger bend
radius.
Jack Phillips
NX899JP
Smith Mountain Lake, Virginia
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of PoconoJohn2
Sent: Thursday, April 16, 2020 8:53 PM
Subject: Pietenpol-List: Re: Heating after the bend
--> <redroof@protonmail.com>
Same here. I never pre-heated anything (except tubing to squish the ends),
but for these 90 degree bends, just curious. I'm not worried about the small
bends on wire fittings and such.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=495850#495850
Message 3
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| Subject: | Re: Heating after the bend |
A pictures worth a thousand words. I was going to use the rod you see in the second
photo with a vise, but my floor mounted bender seemed to give a rounder radius
(using trial pieces), so went with that.
The bend radius looks OK and no damage noted. I beveled the edges also.
The details in these photos is amazing. I took them from 150 grit to 220 to 320,
and they looked good. Seeing them now, guess I'll hit 'em again.
John C
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=495862#495862
Attachments:
http://forums.matronics.com//files/piet9916_181.jpg
http://forums.matronics.com//files/bend_438.jpg
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