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2. Spot welding - Wikipedia

   en.wikipedia.org/wiki/Spot_welding

   A spot welding robot. Spot welding involves three stages; the first of which involves the electrodes being brought to the surface of the metal and applying a slight amount of pressure. The current from the electrodes is then applied briefly after which the current is removed but the electrodes remain in place for the material to cool.

3. Friction stir spot welding - Wikipedia

   en.wikipedia.org/wiki/Friction_stir_spot_welding

   In friction stir spot welding, individual spot welds are created by pressing a rotating tool with high force onto the top surface of two sheets that overlap each other in the lap joint. The frictional heat and the high pressure plastify the workpiece material, so that the tip of the pin plunges into the joint area between the two sheets and ...

4. Electric resistance welding - Wikipedia

   en.wikipedia.org/wiki/Electric_resistance_welding

   Spot welding is a resistance welding method used to join two or more overlapping metal sheets, studs, projections, electrical wiring hangers, some heat exchanger fins, and some tubing. Usually power sources and welding equipment are sized to the specific thickness and material being welded together.

5. Friction stir welding - Wikipedia

   en.wikipedia.org/wiki/Friction_stir_welding

   Close-up view of a friction stir weld tack tool. The bulkhead and nosecone of the Orion spacecraft are joined using friction stir welding. Joint designs. Friction stir welding (FSW) is a solid-state joining process that uses a non-consumable tool to join two facing workpieces without melting the workpiece material.

6. Shot welding - Wikipedia

   en.wikipedia.org/wiki/Shot_welding

   Shot welding is a type of electric resistance welding which, like spot welding, is used to join two pieces of metal together. The distinguishing feature is that in shot welding, strips and sheets of metal (usually stainless steel) are "sewed" together with rows of uniform spot welds. [ 1 ]

7. Vehicle frame - Wikipedia

   en.wikipedia.org/wiki/Vehicle_frame

   Vehicle structure has shifted from the traditional body-on-frame architecture to the lighter unitized/integrated body structure that is now used for most cars. [10] Integral frame and body construction requires more than simply welding an unstressed body to a conventional frame. In a fully integrated body structure, the entire car is a load ...