SHAFT FOR STEERING DEVICE, METHOD OF MANUFACTURING SHAFT FOR STEERING DEVICE, AND ELECTRIC POWER STEERING DEVICE
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United States of America Patent
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Issued Date -
Dec 3, 2020
app pub date -
Feb 13, 2018
filing date -
Mar 27, 2017
priority date (Note) -
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Abstract
To provide a method of manufacturing a shaft for a steering device, the shaft including a spline shaft part to be coupled with an input shaft, a stopper part to be coupled with an output shaft, and an intermediate shaft part that couples the spline shaft part with the stopper part. The method includes: a step of forming a hole part recessed in an axial direction from one end of a pillar-shaped material by forging; and a step of pressing the material in which the hole part has been formed into a die to perform drawing in a radial direction on a portion of the material at which the stopper part is formed and prolonging a length along the axial direction of the hole part at the same time by forging.
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