Title:
FABRICATING METHOD AND APPARATUS OF MULTIILAYERED HELICALLY SEAMED PIPE
Document Type and Number:
Japanese Patent JPS5462158
Kind Code:
A
Abstract:
A method of and device for producing multi-layer pipes by helically winding a plurality of bands loosely arranged one above the other, which are individually withdrawn from a supply, straightened out, trimmed, and in the form of a band loop are conveyed to the forming station at the respective angle of lead-in corresponding to the respective pipe diameter, whereupon the layers are together welded to form a pipe strand which is subsequently cut into individual pipes. All bands are supplied and advanced independently of the irregularities of the respective longitudinal band edge shape in steadily straight lead-in directions, and all band edges are machined together to a possible maximum width in coordination with each other whereupon the bands are driven together while the welding gap is controlled in conformity with their band edge shape merely by pivoting the pipe.
Inventors:
KAARU DAAMEN
YUURUGEN ENGERU
HAINTSU GUROOSU
MARUCHIN HENINGU
BUERUNAA BUENNEMAN
YUURUGEN ENGERU
HAINTSU GUROOSU
MARUCHIN HENINGU
BUERUNAA BUENNEMAN
Application Number:
JP12347878A
Publication Date:
May 18, 1979
Filing Date:
October 06, 1978
Export Citation:
Assignee:
HOESCH WERKE AG
International Classes:
B21C37/12; (IPC1-7): B21C37/12