Chemically machined sheet metal cutting tools and method

Details Chemically machined sheet metal cutting tools and method Chemically machined sheet metal cutting tools and method

B - Operations, Transporting

23

D

B23D 61/02 (2006.01) B23D 71/00 (2006.01) B23D 73/00 (2006.01) B24D 11/00 (2006.01) C23F 1/04 (2006.01) C23F 1/06 (2006.01)

Patent

CA 2055945

A method is shown for manufacturing a sheet metal tool from a metal blank in which a predetermined pattern of etching resistant material is applied to the back surface of the metal blank to define exposed areas separated by resist areas. A layer of etching resistant material is also applied to the front surface of the metal blank which overlies at least the exposed areas on the back surface of the metal blank. The exposed areas on the back surface are then subjected to etching treatment through the exposed areas to form a tooth shape with a cutting edge. The etching treatment is applied solely from the back surface of the metal blank, whereby the cutting edge is so formed terminate in sharpened surfaces in the plane of the front surface, protected by the layer of the etching resistant material on the front surface of the metal blank. 35

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