Cutting – Tool or tool with support – Cutting couple type
Patent
1995-03-27
1998-03-17
Dexter, Clark F.
Cutting
Tool or tool with support
Cutting couple type
83689, 30360, 30361, B26F 114
Patent
active
057274363
ABSTRACT:
A draw punch of the type used for cutting holes in various materials such as sheet metal has a cylindrical body with a central bore through it and a cutting edge at the outside diameter of the body. A working face is defined at one end of the body between the cutting edge and the bore. The working face includes two diametral axial faces which extend from a root to a peak. The working face further includes two valleys located between the peak of one axial face and the root of the other axial face. Primary helical surfaces extend from a peak to a valley while secondary helical surfaces extend from the valley to the root. The helical surfaces are everywhere relieved in a radial direction from a plane normal to the axis of the body and intersecting any point on the cutting edge.
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Burgess, III Edwin R.
Swedberg Benjamin D.
Dexter Clark F.
Ideal Industries Inc.
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