Apparatus for forming a large diameter pipe

Details Apparatus for forming a large diameter pipe Apparatus for forming a large diameter pipe

1976-06-28

1977-09-20

Mehr, Milton S.

Metal deforming

By tool-couple pressing together adjacent surface portions...

To form helically-seamed tube

226189, 72166, 72168, B21C 3712

Patent

active

040488276

ABSTRACT:
An apparatus for helically winding a strip of sheet metal into a large diameter pipe and connecting the edges of the strip by preforming and rabbeting. The edge bending for the rabbet is done in a preforming station and a rabbeting station in which the bends are sequentially and increasingly formed with multiple units at each station. Adjacent units are hinged and devices for adjusting the angular relationship between adjacent units are provided, including spacers and adjustable threaded devices. Gears permit driving multiple units at various adjustment angles.

REFERENCES:
patent: 3144071 (1964-08-01), Nash
patent: 3268985 (1966-08-01), Smith
patent: 3338297 (1967-08-01), Foldessy
patent: 3863479 (1975-02-01), Lipp
patent: 3938584 (1976-02-01), Meylan

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