Metal deforming – By application of fluent medium – or energy field – With actuated tool engaging work
Patent
1987-12-30
1989-06-20
Jones, David
Metal deforming
By application of fluent medium, or energy field
With actuated tool engaging work
72 61, 72 62, 72 54, 294211, B21D 2602
Patent
active
048400530
ABSTRACT:
A method for forming branch pipes on the periphery of a pipe, such as a manifold for automobiles, is characterized in that the branch pipes are formed by a bulging process to have a predetermined thickness without thinning. A first embodiment includes the step of indenting a pipe member by press work or the like, at locations close to the position of a projection, in a preliminary deforming process. A second embodiment employs a bulge mold having fixed spaces and variable spaces for forming a plurality of projections. The second embodiment includes the step of bulging the pipe material into the fixed spaces while the variable spaces are occupied by detachable members, and the step of removing the detachable members from the mold and then bulging the pipe member again.
REFERENCES:
patent: 2372917 (1945-04-01), Tuttle
patent: 2960142 (1960-11-01), Cimochowski
Jones David
Kokan Kako Co., Ltd.
Mitsui & Co. Ltd.
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