Method of producing fluid-chamber component elements
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United States of America Patent
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-
Mar 14, 1995
Issued Date -
N/A
app pub date -
Aug 16, 1994
filing date -
Jul 20, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
To form a seal ring groove in the outer peripheral surface of a steel plate having a circular contour, the present invention provides a method of producing fluid-chamber component elements by which the peripheral portion of the steel plate held by and between a pair of rotary molds is thickened with the use of a roller before the seal ring groove is formed. According to the method of the present invention, a preliminary thickened portion is first formed at the peripheral portion of the steel plate. Then, there is formed, at the outer peripheral surface of the steel plate, a final thickened portion having such a thickness that the seal ring groove can be formed therein. This prevents the steel plate from being buckling by a pushing force applied by a roller at the time when forming the final thickened portion.
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