Re: [CR] was: Re: Bilaminated Frame Construction, now: shapingmachine


Date: Thu, 20 May 2004 13:24:49 -0400
From: jamie swan <jswan@optonline.net>
Subject: Re: [CR] was: Re: Bilaminated Frame Construction, now: shapingmachine
To: henox <henox@icycle.net>
References: <000001c43e6c$9d8f2290$9569bf3f@D8W8FB21> <018a01c43f53$11b61e80$d70456d1@pavilion>
x-mac-creator=4D4F5353
cc: classicrendezvous@bikelist.org
cc: classicrendezvous@bikelist.org

About a year ago I toured a facility that does precision laser cutting. Mostly they work on flat stock but they also have a machine that does tubes. The owner told me that they do a lot of work fish mouthing titanium tubes for a bicycle company in Massachusetts...

Jamie Swan - Northport, N.Y.

henox wrote:
> Subject: RE: [CR] was: Re: Bilaminated Frame Construction, now:
> shapingmachine
>
> I don't think it likely that a shaper would have been used to produce
> sheetmetal "lug" blanks.
>
> A tracing nibbler, however, would have been just the ticket.
>
> Using a nibbler to make "lug" blanks, you would first make a pattern guide
> which is attached to a sheetmetal blank. The pattern is smaller than the
> finished part and is moved against a guide pin while the blank is nibbled
> away to produce an identical (but larger) version of the pattern.
> One of the manufacturers where I once worked had a Heck nibbler which was
> used to quickly produce sheet metal brackets and other small parts.
>
> BTW, in one of my visits to the Dawes factory I was shown how they used a
> cylindrical nibbler to miter the ends of the tubes, to basically nibble the
> fishmouths which they then touched up with a file. Very fast!

>

> Hugh Enox

> La Honda