Search Results for Welding machines

This article provides information on radial friction welding, which adopts the principle of rotating and compressing a solid ring around two stationary pipe. The process evolution of this welding is illustrated. The article also examines the equipment used and operating steps. It also illustrates a prototype of radial friction-welding machine and concludes with a discussion on applications that would be suitable for radial friction welding.

Resistance spot welding (RSW) is a process in which faying surfaces are joined in one or more spots by the heat generated by resistance to the flow of electric current through workpieces that are held together under force by electrodes. This article discusses the major advantages of spot welding and the three principal elements, such as electrical circuit, control circuit, and mechanical system, of RSW machines. It reviews the three basic types of RSW machines: pedestal-type welding machines, portable welding guns, and multiple spot welding machines. The article provides information on weldabilily of uncoated steels and zinc-coated steels, as well as aluminum alloys.

Resistance seam welding (RSEW) is a process in which the heat generated by resistance to the flow of electric current in the work metal is combined with pressure to produce a welded seam. This article discusses the various classes of the RSEW process, namely roll spot welding, reinforced roll spot welding, and leak-tight seam welding. It provides information on the applications of lap seam weld, mash seam weld, and butt seam weld. The article reviews the advantages and limitations of seam welding compared to resistance spot welding, projection welding, and laser welding. It describes the four basic types of resistance seam weld machines: circular, longitudinal, universal, and portable. The article concludes with a discussion on weld quality and process control for seam welding.

Flash welding (FW) is a resistance welding process in which a butt joint weld is produced by a flashing action and by the application of pressure. Flash welding is used to join metallic parts that have similar cross sections in terms of size and shape. This article discusses flash-welding applications, including chain links, transmission bands, automotive flywheel ring gears, aircraft landing gear, band-saw blades, and crankshaft counter weights. It describes the components of a typical flash-welding machine. The article provides information on the electrical controls of flash-welding equipment. These include programmable controllers, welding current controllers, and either motor or servo-valve controllers.

This article provides an overview of the components of a resistance welding machine. It focuses on the single-phase control system and medium-frequency direct current system of resistance welding. The article also includes information on their feedback systems, rectification systems, and power sources.