Metal deforming – With 'coating' of work – Metal coating
Patent
1994-03-22
1996-01-23
Jones, David
Metal deforming
With 'coating' of work
Metal coating
72347, 72700, B21B 4500, B21C 2324
Patent
active
054857368
ABSTRACT:
A method of forming a seamless cylinder shell in which a layer of nickel is electroplated on a steel sheet so that a composite sheet is formed. The composite sheet is then preferably cut into a circular blank before further processing. The circular blank is subjected to an oxalic acid pretreatment for the nickel side and a zinc phosphate pretreatment for the steel side to retain a lubricant on the two opposed surfaces thereof and is thereafter lubricated with the lubricant. The circular blank is preferably cupped, relubricated, and drawn into the seamless cylinder shell. The seamless cylinder shell can be finished into a seamless gas cylinder by spinning one end of the cylinder into a cylinder head, internally threading the formed cylinder head, and then heat treating the cylinder.
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Collier John P.
Hogle Richard
Marsh James G.
Thomas Prakash
Butler Rodney
Cassett Larry R.
Jones David
Rosemblum David M.
The BOC Group Inc.
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