Method and apparatus for forming a profile groove in a key blank
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United States of America Patent
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Mar 20, 2018
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N/A
app pub date -
Jun 11, 2013
filing date -
Jul 18, 2012
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Abstract
A method and an apparatus for forming a profile groove in an elongated key blank having a key blade with opposite side surfaces. The profile groove is formed in a surface of the key blank by a punching or a broaching tool with at least one tooth. The punching or broaching tool is forced and guided longitudinally in parallel to the key blank so as to cut out the material of the key blank into the desired profile shape, corresponding to the cross-sectional shape of the at least one tooth. At the same time, the opposite side surfaces portions of the key blank are clamped or held firmly between opposite holding surfaces of a fixture, causing a firm abutment and retaining action on the longitudinal side surface portions of the key blank located adjacent to and all along the profile groove being formed.
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