Author Topic: Stupid fabrication question  (Read 3576 times)

Online Antietam Classic Cycle

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Stupid fabrication question
« on: January 23, 2016, 06:29:59 PM »
I'm shortening some Guzzi fender braces, cutting the end off, smashing them shut in the vise and then drilling a new hole. That's fine for mock-up purposes, but for the pair I will be using I'd like to make the ends look like the factory did it.



How is this achieved? Is there some sort of die available to do this?
Charlie

Offline Rich A

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Re: Stupid fabrication question
« Reply #1 on: January 23, 2016, 06:34:04 PM »
You're going to re-chrome, right? An alternative, which would preserve the ends, would be to cut the braces in the middle and then weld there (possibly with an insert for strength).

Rich A

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Re: Stupid fabrication question
« Reply #2 on: January 23, 2016, 06:36:16 PM »
You're going to re-chrome, right? An alternative, which would preserve the ends, would be to cut the braces in the middle and then weld there (possibly with an insert for strength).

Rich A

Thanks, I thought about that. Just trying to explore all my options.
Charlie

canuck750

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Re: Stupid fabrication question
« Reply #3 on: January 23, 2016, 07:33:29 PM »
This may work,
take a block of steel, drill a hole down the center of the block half way, the diameter of the stay, then cut the block in half along the center of the hole, take the two halves, wrap the ends of the stay and use a hydraulic press to force the two sections together, the flat, un-drilled section of the two parts will flatten the stay, the drilled out parts should hold the stay in place and keep the cone shape of the stay intact.

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Online Antietam Classic Cycle

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Re: Stupid fabrication question
« Reply #5 on: January 23, 2016, 08:43:03 PM »
This may work,
take a block of steel, drill a hole down the center of the block half way, the diameter of the stay, then cut the block in half along the center of the hole, take the two halves, wrap the ends of the stay and use a hydraulic press to force the two sections together, the flat, un-drilled section of the two parts will flatten the stay, the drilled out parts should hold the stay in place and keep the cone shape of the stay intact.

I envisioned the same thing in my head. I'd prefer to buy one ready made if someone makes it.
Charlie


kidneb

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Re: Stupid fabrication question
« Reply #7 on: January 25, 2016, 06:38:50 PM »
This may work,
take a block of steel, drill a hole down the center of the block half way, the diameter of the stay, then cut the block in half along the center of the hole, take the two halves, wrap the ends of the stay and use a hydraulic press to force the two sections together, the flat, un-drilled section of the two parts will flatten the stay, the drilled out parts should hold the stay in place and keep the cone shape of the stay intact.

Same same but different
I made up a simple iron-age(!) tool to flatten the tube ends when I made a few luggage racks some years ago. Mild steel is rewarding to work with, experimenting with different profiles will just be fun, but the easiest one is of course the circular one I chose.
And as they say (or do they ? ) ,- a picture says more than a thousand words. And four pictures say ------- :undecided:











canuck750

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Re: Stupid fabrication question
« Reply #8 on: January 25, 2016, 07:02:49 PM »
Brilliant! I need to make one of those.

Online Antietam Classic Cycle

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Re: Stupid fabrication question
« Reply #9 on: January 25, 2016, 09:30:59 PM »
Interesting! Thanks for the photos.
Charlie

Offline tris

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Re: Stupid fabrication question
« Reply #10 on: January 26, 2016, 01:06:03 AM »
Damn - don't people know a lot of good stuff  :thumb: :thumb: :bow: :bow:
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Offline Chuck in Indiana

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Re: Stupid fabrication question
« Reply #11 on: January 26, 2016, 06:57:40 AM »
Beat me to it.  :smiley: Typical die making stuff. Polishing the small radius will make the metal flow more smoothly. On heavier materials, heating it to a dark carrot color will make the effort required considerably less.
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