Electric resistance welding

About: Electric resistance welding is a research topic. Over the lifetime, 16761 publications have been published within this topic receiving 154851 citations.

Heat generation during friction stir welding process

Abstract: Friction stir welding - FSW was a promising welding technology from the same moment of its existence because of its easy use, low energy costs, being ecology friendly process and with no need for filler metal. FSW works in the solid state of weld metals and basic goals of the process are to generate thermal energy by friction on contact of FSW tool and welding pieces, which will soften weld pieces and stir it with solid metal into weld. FSW process has five main phases: plunging into weld pieces, dwelling, moving along joint line for the weld creation, final dwelling and pulling out of the welding tool from the weld. Generated heat is in proportion with large number of parameters, but most significant are contact pressure between tool - weld pieces and speed. Significant thermal energy is generated during FSW and there is mathematical model which describe these stages but still there are several inaccuracies of the model that give some differences between theoretical and experimentally determined amount of heat.

Arc welding control method and arc welding device

Abstract: An arc welding control method performs welding of a work by alternately repeating a short-circuit period for short-circuiting a welding wire to a work and an arc period for regenerating an arc to perform arc discharge. The control is performed so that the welding output current immediately after regeneration of the arc is maintained higher than the welding output current immediately before the arc regeneration for a predetermined period of time.

Welding Process Technology

Abstract: Preface 1. Properties and classification of welding processes 2. The welding arc 3. Flux-shielded arc welding 4. Gas-shielded arc welding 5. Unshielded and short-time arc welding 6. Resistance welding 7. Thermochemical welding 8. Radiant-energy welding 9. Solid-phase welding 10. The selection of welding processes 11. Automatic welding 12. Economic considerations Index.

Method and material for resistance welding steel-base metal sheet to aluminum-base metal sheet

Abstract: The present invention relates to a resistance welding method suitable for use in spot welding between a steel-base metal sheet, which has been plated for rust prevention purposes, and an aluminum-base metal sheet and aims to permit a current to flow at a high density across the plated steel sheet and the aluminum-clad steel sheet, thereby realizing high-quality welding. An aluminum-clad steel sheet comprised of a steel layer having projections and an aluminum layer is interposed between the plated steel sheet and the aluminum-base metal sheet to be welded to each other. An electrode is energized by a predetermined weld current from an alternating power supply. The current path is limited to the area of the projections, and metallic melt formed by melting of the plating is accommodated between the projections, preventing the current-carrying area from being increased. Consequently, the temperature of the interface of the plated steel sheet and the aluminum-clad steel sheet can be efficiently raised, resulting in the formation of a proper nugget on both sides of the aluminum-clad steel sheet.