FORMING GROOVES IN A TUBULAR MEMBER

摘要

In a method of forming grooves in a tubular member having an inner surface and an outer surface, an end of the tubular member (1) is inserted into a forming die (4) having a bore (5) of cylindrical configuration with a selected pattern of grooves (6, 7, 8) formed in the bore. A deformation force is applied to the inner surface of the tubular member which impresses the pattern of grooves of the die on the outer surface of the tubular member in the die, and thereby causes the outer surface to acquire the shape of the pattern of grooves in the forming die.