Method of manufacturing a tube and a machine for use therein
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United States of America Patent
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Nov 24, 2020
Grant Date -
Dec 28, 2017
app pub date -
Dec 17, 2015
filing date -
Dec 17, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A method is used to manufacture a drawn tube having a hollow low interior for housing an axle shaft. The method includes the steps of placing a billet into a first die assembly and pressing the billet into the first die to producing a pre-formed billet. The method also includes the steps of moving the pre-formed billet from the first die assembly to a second die assembly and pressing the pre-formed billet into the second die assembly to produce an extruded tube. The method further includes the steps of moving the extruded tube from the second die assembly to a third die assembly and pressing the extruded tube into the third die assembly to further elongate the extruded tube and decrease the thickness of the wall of the extruded tube to of from about 3 to about 18 millimeters to produce the drawn tube having the yield strength of at least 750 MPa.
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