Method for forming a variable wall light weight axle shaft with friction welded flange
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United States of America Patent
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-
Jul 26, 2016
Grant Date -
Oct 8, 2015
app pub date -
Apr 8, 2014
filing date -
Apr 8, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method for forming a lightweight axle shaft is provided. A first tubular blank is inserted in a die defining an extrusion throat at one end. A tool is inserted into the die having a mandrel with portions of increasing diameter. The tool is moved towards the outlet end of the die to partially extrude the blank through the extrusion throat and form a hollow axle shaft having a variable inner diameter based on the varying diameter of the mandrel. The tool is then removed and a second tubular blank is inserted and placed in engagement with the first blank. The tool, or a different tool, is inserted into the die and again moved towards the outlet end of the die to complete extrusion of the first blank and produce a shaft having diameters at each end that are less than the diameter of an intermediate portion of the shaft.
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