National Machinery LLC

Jeffrey W Carper

Thomas E Hay

Stanley J Wasserman

Christopher W Snavely

A method and tooling for forming a cartridge case blank comprising backward extruding a tube from a length of wire stock in multiple backward extrusion steps with progressive tooling to obtain an intermediate blank that can be finish drawn without a preceding annealing step and which if otherwise not subjected to multiple backward extrusion steps, would require annealing prior to finish drawing to avoid tearing.

Long cartridge case

An improved cartridge case completely produced net shape on a progressive cold former that includes a trim to lengthy station with an internal shearing tool.

Precision forged cartridge case

A tool for a progressive forming machine comprising an assembly having a workpiece shaping cavity symmetrical about an axis and including an end wall transverse to the axis, a conical bore open to the end wall and centered on the axis, the sides of the conical bore being described by a relatively small angle relative to the axis, and an ejector pin for forcing workpieces form the cavity, the ejector pin having an end face and a conical body portion rearward of the end face, the conical body portion having an external surface matching a surface of the conical bore.

Poppet pin ejector

A method of improving the surface finish of a sheared end face of a cylindrical blank in a progressive forming machine comprising deforming the end face out of its original as sheared transverse plane into a first shape concentric with the axis of the blank that slightly departs from the original plane a distance that increases with proximity to the axis of the blank, thereafter deforming the end face from the first shape into a second shape in a direction opposite a direction the first shape was displaced from the original shear plane, the second shape slightly departing from a transverse plane a distance that increases with proximity to the axis of the blank.

Cut-off end surface improvement

Die segment for a progressive former

Punch for a progressive former

A machine, tooling and method for cold forming complex metal parts such as a banjo style hose fitting starting with a near net shape volume of wire and continuing with multiple forging blows and an intermediate rotation of the blank to produce a hose coupling shell end, a transition neck, a large counterbored annular coupling body and a perpendicular alignment tang.

Growing community of inventors

Tiffin, OH, United States of America

Jeffrey W Carper