Polymetallurgical Corporation

Roderick L Dair

Paul Armand Dion

Armenag Iskenderian

A multi-gauge composite metal strip is produced from a plurality of individual metal strips of different thicknesses. The individual strips are heated, passed through an oxide reducing atmosphere and are then directed between a pair of work rolls with their adjacent edges arranged in a mutually overlapping relationship. The rolling action effects a reduction in the thickness of each strip while simultaneously effecting solid phase bonding of their overlapping edges. The resulting composite multi-gauge strip is subjected to tensile stresses which exceed the yield strength of the strip materials at the time and in the condition at which the composite strip exits from between the work rolls.

Multi-gauge bondings

A continuous process for solid-phase edge bonding a plurality of dissimilar metal strips to form a composite edge-bonded strip. A plurality of elongated metal strips of equal thickness are heated and aligned in a substantially planar, edge-to-edge relationship and pass through a pair of compression bonding rollers. The bonding roller form a rectangular-shaped cavity having a width slightly greater than the combined width of the plurality of strips and a height less than that of the strips, to reduce in thickness and further elongate the metal strips without substantially changing the combined width of the strips and to form a solid-phase bond between adjacent side edges of the strips. The strength of the solid-phase bond is substantially equal to that of the parent metal strips such that the composite strip can be cut or stamped to form detail component parts such as electronic lead frames without bond failure.

Growing community of inventors

Hope Valley, RI, United States of America

Roderick L Dair