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General Category => General Discussion => Topic started by: Antietam Classic Cycle on January 23, 2016, 06:29:59 PM

Title: Stupid fabrication question
Post by: Antietam Classic Cycle 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.

(https://scontent.fash1-1.fna.fbcdn.net/hphotos-xft1/v/t1.0-9/12592342_830074053781394_8111127144285728726_n.jpg?oh=38587a84b64b56fa05fe814b18f178ef&oe=57411379)

How is this achieved? Is there some sort of die available to do this?
Title: Re: Stupid fabrication question
Post by: Rich A 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
Title: Re: Stupid fabrication question
Post by: Antietam Classic Cycle 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.
Title: Re: Stupid fabrication question
Post by: canuck750 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.
Title: Re: Stupid fabrication question
Post by: Perazzimx14 on January 23, 2016, 07:50:13 PM
Might want to check here:

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjij4KmqsHKAhUD7D4KHe-zDEAQFggqMAA&url=http%3A%2F%2Fwww.webendtube.com%2Fflat.htm&usg=AFQjCNHmjUAgTh3hGkOnvU_6piXETx6uXw
Title: Re: Stupid fabrication question
Post by: Antietam Classic Cycle 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.
Title: Re: Stupid fabrication question
Post by: Antietam Classic Cycle on January 23, 2016, 08:46:33 PM
Might want to check here:

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjij4KmqsHKAhUD7D4KHe-zDEAQFggqMAA&url=http%3A%2F%2Fwww.webendtube.com%2Fflat.htm&usg=AFQjCNHmjUAgTh3hGkOnvU_6piXETx6uXw

Interesting. Thanks.
Title: Re: Stupid fabrication question
Post by: kidneb 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:

(http://i1077.photobucket.com/albums/w477/kidneb51/DSC02616_zps07wkgwyb.jpg) (http://s1077.photobucket.com/user/kidneb51/media/DSC02616_zps07wkgwyb.jpg.html)

(http://i1077.photobucket.com/albums/w477/kidneb51/DSC02617_zpsyhmnhkpf.jpg) (http://s1077.photobucket.com/user/kidneb51/media/DSC02617_zpsyhmnhkpf.jpg.html)

(http://i1077.photobucket.com/albums/w477/kidneb51/DSC02622_zpsb6mb6po5.jpg) (http://s1077.photobucket.com/user/kidneb51/media/DSC02622_zpsb6mb6po5.jpg.html)

(http://i1077.photobucket.com/albums/w477/kidneb51/DSC02620_zpszh92n2x5.jpg) (http://s1077.photobucket.com/user/kidneb51/media/DSC02620_zpszh92n2x5.jpg.html)


Title: Re: Stupid fabrication question
Post by: canuck750 on January 25, 2016, 07:02:49 PM
Brilliant! I need to make one of those.
Title: Re: Stupid fabrication question
Post by: Antietam Classic Cycle on January 25, 2016, 09:30:59 PM
Interesting! Thanks for the photos.
Title: Re: Stupid fabrication question
Post by: tris on January 26, 2016, 01:06:03 AM
Damn - don't people know a lot of good stuff  :thumb: :thumb: :bow: :bow:
Title: Re: Stupid fabrication question
Post by: Chuck in Indiana 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.