Patent ID: 6612007
Filing Date: 2003-09-02
Classification: B21D,Y10T

Abstract:
A die for a ductile material clinch joiner, comprising:a) a die anvil, the anvil having a body portion and an anvil surface; b) at least two die blades, the blades extending generally transverse above and below the anvil surface and forming with the anvil surface a die aperture for a die punch, the separation between the blades defining a die aperture width or diameter and the extension of the die blades above the anvil surface defining a die aperture depth; c) at least one pivot recess in the body portion of the anvil; d) a protrusion on each of the die blades, each protrusion being seated in a matching relationship with the pivot recess to form a pivot joint by which each die blade may pivot with respect to the body portion of the anvil in order to constrict and dilate the aperture width or diameter, the pivot joint having a pivot axis; e) at least one biasing member by which the die blades are biased to constrict the die aperture; and f) a die shield around the die blades; wherein the pivot joints extends directly underneath the anvil surface permitting the pivot axis to move inwards so that when the die aperture is dilated the aperture depth is decreased.