Method of forming a tubular axle
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United States of America Patent
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N/A
Issued Date -
Feb 27, 2003
app pub date -
Aug 22, 2001
filing date -
Aug 22, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of forming a tubular axle assembly is provided. The method includes providing a non-circular tubular member such as a rectangular tube having an end portion. The end portion is formed to provide a first generally circular end. A king pin boss is provided with a second generally circular end of approximate the same size as the first generally circular end. The two ends are friction welding together, and the tubular member are bent to a desired axle shape. In addition, a bulk head may be inserted into the tubular member prior to forming the end portion. The first circular end is preferably formed by a swaging or pointing process to reduce the cross-sectional area of the tubular member and form the circular end. The axle may then be processed by heat treating, quenching, and tempering the axle. Straightening of the axle may also be desirable.
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