HOLLOW DRIVE SHAFT USING UPSETTING METHOD AND MANUFACTURING METHOD THEREFOR
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United States of America Patent
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Issued Date -
Sep 22, 2022
app pub date -
Jun 9, 2022
filing date -
Sep 28, 2018
priority date (Note) -
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Abstract
Provided are a hollow drive shaft using an upsetting method and a method of manufacturing the same, in which hot forging and upsetting processes are applied to both ends of a workpiece so that an outer diameter at both ends of the workpiece is greater than an outer diameter of a middle part of the workpiece, thereby reducing a weight of the drive shaft and enabling the drive shaft to transmit higher driving power. According to the present invention, the upsetting process is applied during the hot forging process to manufacture the hollow drive shaft, portions to be substantially processed are limited to portions at both ends of the workpiece, and the number of upsetting processes is limited to a minimum number (2 or the like), such that initial investment costs and manufacturing costs are low because the number of processes is small.
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