Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1983-11-15
1986-02-11
Godici, Nicholas P.
Metal founding
Process
Shaping liquid metal against a forming surface
164465, 164417, 29 33C, 29 33D, 228145, 72 49, 148 2, B22D 1112
Patent
active
045693862
ABSTRACT:
A method of manufacturing a cylindrical billet having a predetermined length useable as raw material for producing a pipe. This method is practiced by way of the steps of drawing a cast slab from a casting mold on a continuous casting stand, spirally winding or cylindrically bending it around a rotating mandrel, joining together both end faces of the wound or bent cast slab to a cylindrical body and cutting it to a predetermined length. Two or more cast slabs may be used for forming the cylindrical body. Two rectangular cast slabs may be used as starting material which are subjected to roll forming and thereafter are cut to the predetermined length. They are then press worked to form a recess having a semi-circular cross-sectional configuration whereby a cylindrical body is constituted by assembly thereof in a superimposed relation. Alternatively, a cylindrical body may be constituted by two cast slabs each of which is subjected to roll forming over both the outside and inside surfaces thereof, the outside surface being roll formed to the semi-circular cross-sectional configuration by means of a plurality of forming rollers while the inside surface is formed with a longitudinally extending recess having the semi-circular cross-sectional configuration via a plurality of grooving rollers. Two roll formed cast slabs are united together via a pair of concave drum shaped rollers.
REFERENCES:
patent: 3483915 (1969-12-01), Schneckenberger
patent: 3961741 (1976-06-01), Klein
patent: 4061264 (1977-12-01), Bartels et al.
patent: 4082211 (1978-04-01), Embury
patent: 4353494 (1982-10-01), Olsson
patent: 4477147 (1984-10-01), Winter et al.
Berg K. F.
Godici Nicholas P.
Kabushiki Kaisha Kobe Seiko Sho
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