Safetrack Baavhammar Ab

Torsten Baavhammar

A method and apparatus for reducing energy consumption and minimizing martensite formations when joining a connecting piece of metal with a metal surface by pin brazing. The method comprises the steps of 1) measuring the exact amount of energy required to melt a particular brazing pin against a certain workpiece surface; 2) applying a welding current through the particular brazing pin and the certain workpiece surface to effect pin brazing; 3) calculating the amount of energy which has passed through the brazing pin during pin brazing by multiplying the square of the welding current times the duration of the welding current; 4) advancing the brazing pin automatically toward the workpiece surface during pin brazing so that the distance between the brazing pin and the workpiece remains constant while the welding current is being applied; 5) terminating the welding current when the calculation of the amount of energy which has passed through the particular brazing pin results in the exact amount of energy required to melt the particular pin; and 6) automatically interrupting the welding current if a predetermined period of time expires prior to termination of the welding current. An apparatus is provided for carrying out this method.

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Vellinge, Sweden

Torsten Baavhammar