Patent ID: 6390352
Filing Date: 2002-05-21
Classification: B23K,E21C

Abstract:
The method of brazing a tubular part having a cylindrical outer surface, an annular end surface and a cylindrical bore into a countersink around a bore in a metal body where said countersink has an inner surface complementary in shape to said outer surface and said annular end surface, and said bore in said metal body has a diameter equal or nearly equal to a diameter of said cylindrical bore in said tubular part, said method comprising the steps ofproviding a ring of braze material where said ring of braze material has an inner diameter at least equal to said cylindrical bore and an outer diameter which is not greater than the diameter of said inner surface of said countersink, providing a tubular sleeve having an outer diameter sized to fit snugly within said bore of said metal body, positioning said tubular sleeve within both said cylindrical bore of said tubular part and said bore in a metal body, positioning said ring of braze material over said tubular sleeve and within said countersink, positioning said tungsten carbide tubular part around said tubular sleeve and against said ring of braze material, heating said parts until said ring of braze material melts, seating said annular end surface of said tubular part against said inner surface of said countersink, allowing said braze material to cool and harden, and machining said tubular sleeve out of said bore in said metal body and said cylindrical bore of said tubular part.