Method of manufacturing stator for stepping motor
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United States of America Patent
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Aug 27, 1996
Grant Date -
N/A
app pub date -
Mar 28, 1994
filing date -
Mar 29, 1993
priority date (Note) -
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Abstract
A method of forming a stator for a stepping motor, including the steps of forming comb teeth by cutting a flat section of a plate having a cylindrical section around the flat section and bending the comb teeth up to a first angle. Next, the comb teeth are bent up to a second angle larger than the first angle and the thickness of the comb teeth is reduced so as to render uniform the thickness of all the comb teeth. Then, the cylindrical section is subjected to a drawing process at least one time. Finally, the comb teeth are bent up to a right angle. As a result, the occurrence of cambers in the comb teeth is eliminated and the comb teeth are not inclined in the peripheral direction. Also, the accuracy with which the comb teeth are bent to a right angle can be improved thereby.
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