Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Patent
1987-10-19
1988-11-15
Combs, E. Michael
Metal deforming
By tool-couple pressing together adjacent surface portions...
To form helically-seamed tube
72 66, B21C 3712
Patent
active
047839805
ABSTRACT:
An apparatus for making helically wound interlocked flexible pipe includes a rotating head mounted for rotation about a main shaft. Two supply spools of strip material are mounted on the rear side of the rotating head, a take off guide beam assembly being used to take off flat strip material from one of the spools, and guiding it to the rotating head. The rotating head is mounted on the main shaft for rotation therewith and supports a tool head assembly including a roller forming mill for forming the strip material. The strip is guided from a point behind the rotating head to a point in front of or downstream from the rotating head along the shaft. A face plate assembly, which supports the pressure rollers for closing and interlocking the successively adjacent turns of the formed strip, is axially spaced from the tool head assembly. A constant supply or reservoir of formed strip material, in the form of a loop in a substantially circular path, is provided to insure proper supply of formed strip material on demand to the pressure rollers. A sensor is used to monitor the instaneously contractions and expansions of the supply loop from its nominal size, such variations being utilized to modify and adjust the instaneous speed of rotation of the forming rollers. A rewinding system is used to rewind flat strip material on the other non-feeding supply spool. The apparatus assures simple and convenient start up of production of flexible pipe, and efficient operation without buckling or damage to the strip material.
REFERENCES:
patent: 1004644 (1911-10-01), Gilson
patent: 1703250 (1929-02-01), Sleeper
patent: 1703251 (1929-02-01), Sleeper
patent: 2693779 (1954-11-01), Padgett
patent: 4597276 (1986-07-01), Legallais et al.
patent: 4724596 (1988-02-01), Pavlyak
Ceeco Machinery Manufacturing Limited
Combs E. Michael
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