Manufacturing method of wire rod, manufacturing apparatus of wire rod, wire rod, and motor
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United States of America Patent
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Oct 25, 2022
Grant Date -
May 7, 2020
app pub date -
Jun 12, 2018
filing date -
Sep 28, 2017
priority date (Note) -
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Abstract
Provided is a manufacturing method of a wire rod for forming a coil, the manufacturing method including the steps of: placing an element wire in a forming space surrounded by a plurality of split dies; and pressure-forming the element wire by moving the plurality of split dies in a direction of narrowing the forming space. In the step of pressure-forming the element wire, at least one of the plurality of split dies is moved, and the plurality of split dies each having a surface that changes in shape in a longitudinal direction of an element wire to pressure-form the element wire into the wire rod having a plurality of different cross-sectional shapes in the longitudinal direction.
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