Abstract: The punch stripper invention provides a design compatible with round or shaped punch points and flat, angular or irregular shaped surfaces to be punched. Using a bronze stripper insert machinable to suit the punch point shape and also three-dimensionally machinable to match the surface to be punched. The bronze stripper insert has graphite plugs to lubricate both the punch shank and the inner diameter of the insert sleeve as both components are used in close tolerance to guide the bronze stripper insert. An alignment pin is used in the insert sleeve to guide by a slot in the bronze stripper insert for anti-rotation. An elastomeric urethane spring is used for the stripping force required behind the bronze stripper insert, but always compressed in a parallel manor to maximize the life of the urethane. A retention plate is used to mount the stripper arrangement to a standard ball lock punch retainer with one or two screw style retention plates depending on clearance requirements.

Abstract: An apparatus for automating the machining operations required to form a teardrop shaped recess in a cylindrical member, such as provided for punches. The apparatus includes a four station turntable assembly, the four stations include a loading/retrieving station and three work stations approximately spaced 90.degree. from adjacent stations. The three work stations each include a grinding tool movable in a horizontal and vertical direction to control the machining of the cylindrical member. The turntable rotates the workpiece from one station to another station.