METHOD OF JOINING COMPONENTS OF EARTH BORING BITS USING A REACTIVE FOIL AND BRAZING MATERIAL

摘要

A reactive foil (41) is used to assemble the components (19, 23) of rock bit cutters (17) and to affix cutting elements to rock bit bodies. A small pulse of localized energy ignites the foil in a fraction of second to deliver the necessary amount of heat energy to flow solder or braze and form a strong, true metallic joint. The reaction in the foil may be activated using optical, electrical, or thermal sources.