Forged material sizing method and apparatus
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United States of America Patent
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Apr 25, 2017
Grant Date -
Oct 8, 2015
app pub date -
Apr 6, 2015
filing date -
Apr 7, 2014
priority date (Note) -
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Abstract
An upper die and a lower die are brought together to perform a sizing work on a roughly forged part of a primary forged article within a die cavity defined between the upper and lower dies. The lower die has a vertical through-hole directly communicated with the die cavity, and a punch is relatively movably received in the vertical through-hole in such a manner as to define jointly with the vertical through-hole an annular material flow passage. During the sizing process, a material of the roughly forge part is forced against a peripheral surface of the die cavity and excess material is allowed to flow into the annular material flow passage.
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