Production method for a semi-finished product and semi-finished product
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United States of America Patent
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Aug 1, 2017
Grant Date -
May 9, 2013
app pub date -
Jul 14, 2011
filing date -
Jul 14, 2010
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Abstract
The production method according to the invention for creating a thread in an elongated semi-finished product comprises the following steps: shaping, especially lengthwise rolling, of at least two lengthwise grooves into a blank and lengthwise rolling of a thread into the areas circumferentially delimited by the grooves. The distance from the beds of the grooves to the axis of the blank is smaller than the distance from the root of the thread to the axis.
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