THREAD CUTTING TAP AND METHOD FOR TREATMENT OF A THREAD CUTTING TAP
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United States of America
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Mar 6, 2025
app pub date -
Dec 1, 2022
filing date -
Dec 1, 2022
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Abstract
A thread cutting tap and a method of treating the thread cutting tap, which includes a thread cutting portion including a plurality of cutting lands, is provided. Each cutting land has one or more thread cutting teeth in the chamfered section. Each thread cutting tooth includes a primary cutting edge. The method includes immersing at least the thread cutting portion in a bed of granules and effectuating relative movement between the thread cutting portion and the granules for generating an edge rounding of a first magnitude at the primary cutting edge of each tooth, and then exposing a subset of the thread cutting teeth to a dynamic plastic deformation treatment. The subset includes all the thread cutting teeth in the chamfered section, so as to generate an edge rounding of a second magnitude, greater than the first magnitude, at the primary cutting edge of each tooth in the subset.
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