Resistance Welding is a high-speed method of joining metals by applying pressure and electrical heat under accurate controls, making a weld in a fraction of a second.

In a typical resistance weld a large amount of current is passed through a concentrated area (Weld Zone) for a specific time while being held under a localized forging pressure. Heat energy is generated when an electrical current passes through an electrical resistance. Since the resistance is highest at the faying surfaces (Part to Part interface) a greater volume of heat is generated at that interface allowing the metal to become molten. A forging pressure is applied at the molten area and the work pieces will alloy together to form a weld nugget.

A good resistance weld is the combination of 3 variables:


Current= The volume of electrical current that flows through the Weld Zone

Pressure= The clamp force used to forge the materials together and contain the molten material until the Weld Zone solidifies

Time= The period of time that electrical current is flowing through the Weld Zone


Once proper parameters are developed, a resistance weld is a fast and efficient way of joining two metals together without the use of gases or filler metals. The welding process can be continued automatically as fast as the material can be fed to the machine.


T. J. Snow has a deep understanding of the resistance welding process. We design, manufacture and deliver solutions that improve quality, durability and productivity. Our engineered solutions deliver improved performance, while delivering consistent results.