WELDING UPPER ROLL COOLING METHOD FOR RESISTANCE WELDED TUBE

PURPOSE:To stably manufacture a resistance welded tube with a sound welded zone by arranging plural metallic rolls having cooling mechanisms on the insides freely rotatably in a contact state on the periphery of a welding upper roll. CONSTITUTION:A metallic strip is formed tubularly 3 while being tr...

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Bibliographic Details
Main Author HAYASHI TOMOTAKA
Format Patent
LanguageEnglish
Published 17.07.1991
Subjects
CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
TRANSPORTING
WELDING
WORKING BY LASER BEAM
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Summary:PURPOSE:To stably manufacture a resistance welded tube with a sound welded zone by arranging plural metallic rolls having cooling mechanisms on the insides freely rotatably in a contact state on the periphery of a welding upper roll. CONSTITUTION:A metallic strip is formed tubularly 3 while being transferred in the longitudinal direction. In the state with both ends thereof abutted on each other, a high-frequency or medium-frequency current is carried to the metallic strip end faces and welding is performed to form the resistance welded tube 3. The welding upper roll 1 to pressurize a welding heating part of the resistance welded tube 3 is cooled. The plural metallic rolls 10 having the cooling mechanisms on the insides are then arranged freely movably in a contact state on the periphery of the welding upper roll 1. By this method, the welding upper roll can be cooled without sprinkling water on the welding roll outside surface.
Bibliography:Application Number: JP19890304356