Flat bar sideways bender. By Fab2Ku. 8:18 video:
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Corm (Sep 1, 2022), mwmkravchenko (Aug 31, 2022), Philip Davies (Sep 10, 2022)
Bending across the flat is known by fabricators as 'hard way'. The process needs a bit more power due to width, but narrow cross section keeps it reasonable.
Most important feature is the form die maintains a close fit, otherwise the bend will collapse and twist. The inside radius can (will) grow, so keep a film of high pressure lube on it, or removal likely ruins intended bend.
Here's a HFT mod to the widely sold import bender. The material was 10ga x ~.62 HRPO. Achieving inside radius is obvious, keeping flattest possible plane the outside diameter of die barely exposed outside edge. These worked off a reference or tooling hole that controlled developing the form consistently.
Homemade tools made with Harbor Freight tools
I seriously doubt the radiused parts in video 0.13 - 0.33 were cold hammer formed with out destroying at least inner side, or a whole lot of work flattening it out. It doesn't exhibit marks of any such effort.
Last edited by Toolmaker51; Sep 9, 2022 at 09:18 PM.
Sincerely,
Toolmaker51
...we'll learn more by wandering than searching...
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