METHOD FOR CONTACT SPOT WELDING OF ZINC-PLATED STEEL SHEETS

METHOD FOR CONTACT SPOT WELDING OF ZINC-PLATED STEEL SHEETS

FIELD: processes and equipment for contact spot welding, namely for welding zinc-plated steel sheets used in automobile manufacture for enhancing corrosion resistance of steel sheets. ^ SUBSTANCE: method comprises process of two-stage welding. At first stage zinc coating is deformed and removed from...

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Hauptverfasser: VAKATOV A.V, DANILOV JU.S
Format: Patent
Sprache:eng ; rus
Schlagworte:
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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creator VAKATOV A.V
DANILOV JU.S
description FIELD: processes and equipment for contact spot welding, namely for welding zinc-plated steel sheets used in automobile manufacture for enhancing corrosion resistance of steel sheets. ^ SUBSTANCE: method comprises process of two-stage welding. At first stage zinc coating is deformed and removed from welding zone due to applying preliminary electric current pulse for heating surface until temperature higher than zinc melting temperature but lower than temperature of forming welded spot. Then main electric current pulse is applied for forming welded spot. Optimal modes of welding current and pulse duration are determined experimentally for pilot lot of parts with use of indicating device. Determined modes are used for welding lot of parts with equivalent thickness of coating. ^ EFFECT: high-quality welded joint, enhanced degree of removing zinc coating from steel sheets. ^ 2 cl, 3 dwg
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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
title METHOD FOR CONTACT SPOT WELDING OF ZINC-PLATED STEEL SHEETS
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