Patent ID: 6240820
Filing Date: 2001-06-05
Classification: B23D,B23P,E04C,Y10T

Abstract:
A die apparatus adapted to engage and cut an end section of a tubular bar made from high strength sheet steel, the tubular bar having walls forming first and second tubular sections that define first and second cavities, with the walls further defining a third cavity between the first and second cavities, the die apparatus comprising:a first die configured to telescopingly engage an end section of the tubular bar, including first, second, and third mandrels configured to extend into the first, second, and third cavities, respectively; the first, second, and third mandrels including first, second, and third cutting edges, respectively, that are aligned such that the first, second, and third cutting edges are positioned for operative engagement from a single direction that extends transversely to the first, second, and third mandrels; anda cutting die having a shearing punch configured to move along the single direction to pass operatively across the aligned cutting edges to sequentially shear the walls to remove a portion of the end section.