Resistance spot welding (RSW) is a process typically used in high-volume, rapid welding applications, such as those found in the automotive, appliance and aerospace industries, to join sheet metal from foil to 0.250-in. (3mm) in thickness. Multiple sheets and dissimilar metals can also be simultaneously welded.

In spot welding, the pieces to be joined are clamped between two electrodes under high force. A large electrical current is passed from electrode to electrode to generate heat at the sheet-sheet (faying) interface. Heating of the joint may occur from both the electrical resistance across microscopic asperities at the faying interface and from the inherent bulk resistivity of the metal.

After the welding current is shut off, continued electrode force maintains pressure on the molten zone during weld nugget solidification to provide joint integrity.

Share this:

Latest News

Cybersecurity Co-op Program Developed by EWI Launches in Virginia
The Virginia Coalfield Economic Development Authority has closed on a $509,000+ grant to the Buchanan County Industrial Development Authority to implement a cybersecurity pilot program designed to create jobs in the cybersecurity field. The project, developed by EWI, will serve to mentor students to learn network monitoring skills through an on-the-job training cooperative aimed at assisting small and medium size manufacturers.The Virginia Coalfield Economic Development Authority has closed on a…
Read more...
Warm Forming of High-Strength Aluminum Automotive Structural Parts: A Success Story
EWI Forming Center has been leading the Aluminum Warm Forming…
Read more...
Sheet Metal Welding Conference 2018 — Call for Papers
The AWS Sheet Metal Welding Conference (SMWC XVIII) has announced…
Read more...
EWI Welcomes Hanon Systems to Membership
We are please to introduce new EWI member Hanon Systems…
Read more...
Marmon Holdings is new EWI member
EWI is pleased to welcome Marmon Holdings, Inc., as a…
Read more...
Increasing Productivity and Efficiency through Next-generation Quality Solutions
Next generation quality systems are helping manufacturers increase productivity and efficiency at every step of the value stream. Learn more about trends and industry-specific applications. Next generation quality systems are helping manufacturers increase productivity and…
Read more...
EWI’s Year in Review 2017
  Each year, EWI works to enhance service to clients…
Read more...
Advancements in Automated Inspection: Three Case Studies
The evolution of automated inspection has enabled manufacturers to achieve dramatic increases in productivity, accuracy, and consistency. Download EWI’s eguide to learn more about the many advantages of incorporating automated inspection into production and read automated inspection success stories from a range of industries.The evolution of automated inspection has enabled manufacturers to achieve…
Read more...