Projection Welding Basics. Projection welding is a type of resistance welding that focuses current and force to a single point or line at the beginning of a weld. Projection welding is another variation of spot welding in which a number of spot welds are made at one time.
Projection Welding Projections low thermal-mass islands are one method of insuring proper heat balance in difficult spot-welding applications when there the parts to be welded vary in size by 51. If a projection weld schedule is not available and a spot weld schedule for the same material is available use it as a guide. Brackets spigots and weld nuts to sheet metal where there is access from only one side and for making attachments to solid forged or machined parts.
Projection welding is a type of resistance welding that focuses current and force to a single point or line at the beginning of a weld.
In most applications one of the workpiece surfaces features multiple small formed projectionsround dimples elongated ridges or rings or the extended corners of weld nuts. Embossed projection welding uses projections worked on the base material to concentrate current flow on the projections. Projection welding is a variation of resistance welding in which current flow is concentrated at the point of contact with a local geometric extension of one or both of the parts being welded. One of the main differences between conventional sheet-to-sheet resistance welding and projection welding is that projection welding is a dynamic process involving considerable movement of the upper electrode.