Patent ID: 7178375

Claim:
Apparatus for progressively stamping a metallic clutch disc from a sheet metal strip, comprising: progressive stamping stations for stamping a blank of the metallic clutch disc from the sheet metal strip so as to have a generally annular shape extending around a central axis and including oppositely oriented axial faces and inner and outer extremities, with one of the extremities having splines forming a generally round shape about the central axis and including a first burr extending therefrom and from one of the axial faces in one axial direction along the central axis, and with the other extremity having a generally continuous round shape about the central axis and including a second burr extending therefrom and from the other axial face in the opposite axial direction as the first burr along the central axis; and a deburring station including a deburring die set having an annular spline shaped deburring punch and a flat deburring die between which the clutch disc blank is positioned for relative movement of the deburring punch and the deburring die toward each other, the spline shaped deburring punch having a peripheral spline shaped deburring projection that flattens the first burr extending from the one spline shaped extremity and the one axial face, and the flat deburring die flattening the second burr extending from the other extremity and the other axial face.