Projection Welding Wikipedia. Projection welding is a resistance weld where the design or shape of the part is used to make discreet individual point contacts to concentrate the current during the welding process. Weld Checkers and monitors measure voltage andor current during the resistance welding process.
The associated N reference numbers second column are specified in ISO 4063 in the European Union published as EN ISO 4063. Projection welding is widely used in production of nut and bolt. Projection welding is one of the most widely applied welding processes for sintered PM parts.
A welded connection is created by means of an electric current and a force that is supplied to the workpieces by mostly flat large-area electrodes.
Their basic functions are to provide data to be used in statistical determinations and to monitor the ongoing process and alert the user to unacceptable variations in a voltage or current-based parameter. Projection welding is a modification of spot welding in which the weld is localized by means of raised sections or projections on one or both of the workpieces to be joined. Mostly in almost all applications with various small projections are molded on single parts surfaces which need to weld. Projection welding has fewer variables that affect the resistance welding process as compared to spot welding.