What is resistance brazing?

Resistance brazing is a variation of the resistance welding process. Joules Law H= I2 RT provides the heat just as in spot welding. There is a squeeze weld and hold cycle. There are electrodes. To differentiate the process a thin piece of braze allow is placed between the parts being joined. The goal is to heat the braze material until it melts and bonds to both mating substrates. Then the current is turned off and the braze material solidifies. The result is a brazed joint bonding the parts together. Low force holders are frequently used.

Low inertia holder CMW Page 1

Low Force Adjustable Force Holder

This process is used to bond materials that are hard to spot weld. Coppers, brass and precious metals. An example is the electrical contact industry resistance brazes household circuit breaker contacts. These contacts are made up of a silver and tungsten composition. They sometimes are projection welded but frequently are resistance brazed.

Reference: CMW Products Inc Catalog
                 Tuffaloy Products Catalog
                 RWMA, Resistance Welding Manual, Section 1, Chapter 6

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