Metal working – Method of mechanical manufacture – Gas and water specific plumbing component making
Patent
1996-03-15
1999-11-16
Bryant, David P.
Metal working
Method of mechanical manufacture
Gas and water specific plumbing component making
72 84, B23P 1500
Patent
active
059834960
ABSTRACT:
A method of making Circular and Oval Flanged Rings, for the connection of thin walled circular and oval ducting, including Circular and Oval Flanged Rings having a Sheet Metal and Air Conditioning Contractors National Association (SMACNA) standard T24 Profile. Thin gauge Lock Form Quality steel, from 10 to 20 gauge, is cut into strips with the strip ends butt welded forming Flanged Ring Band Stock which is inserted and clamped into a Spinning Die. The Spinning Die is rotated by a horizontally configured lathe output shaft presenting the extended portion of the Flanged Ring Band Stock for machine tool forming. Standard machine tools are used to form the Flanged Ring Band Stock into a Circular Flanged Ring including the SMACNA T24 Flanged Ring Profile. A Circular Flanged Ring is cut along a diameter into Semi-circular Flanged Ring Portions; straight segments including segments with SMACNA T24 Linear Segments are roll formed, assembled into a oval shape within a fixture and welded forming the Oval Flanged Ring. The method of making and the Circular and Oval Flanged Rings are disclosed.
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HVAC Duct Construction Standards, Metal and Flexible, First Edition 1985.
Bryant David P.
Butler Marc W.
J.A. Hermanson
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