[modeleng] Re: Spinning
- From: KJones9154@xxxxxxx
- To: modeleng@xxxxxxxxxxxxx
- Date: Wed, 9 Aug 2006 08:11:12 EDT
In a message dated 09/08/2006 12:11:53 GMT Standard Time,
fernj1@xxxxxxxxxxxxx writes:
In the case of the aluminum, he did not remove it from
the lathe until it was finished, but then, aluminium does not work harden
like copper or brass. He spun the sheet against the metal form (production
shop ya know) and forced the metal both ways to prevent the aforementioned
thinning.
I know little about spinning but I used to work for a company that made
light fittings.
The fittings were 'artistically' designed by an architect (just 2B pencil
sketches on large sheets of paper).
My job was to translate these vague shapes into a drawing from which a
wooden mould was made which became the former onto which the aluminium disk was
forced by spinning. There was always a conflict between myself and the
architect
about how accurately I had translated his sketches into a final shape,
anyway, some of these disks started out as flat sheets some 24 inches in
diameter.
It was another company who did the actual spinning and it needed a lot of
experience and skill to get it right. Some of the shapes created went through a
number of stages to create curves and returns, etc. What I do remember is
that the final result often had evidence of some form of lubricant on it which
appeared to be a form of lard, an aspect of the process that I don't think has
been mentioned yet.
Ken Jones in sunny and pleasant Berkshire
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