PISTON ROD MANUFACTURING METHOD
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United States of America Patent
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app pub date -
Jun 7, 2010
filing date -
Sep 9, 2009
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Abandoned
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Abstract
A piston rod manufacturing method for manufacturing a piston rod by joining together respective end surfaces of a rod main body and a rod head, includes a first step of hollowing out respective axial center portions of the rod main body and the rod head from the respective end surfaces thereof in order to remove impurities caused by center segregation, and a second step of joining together the respective end surfaces of the rod main body and the rod head by friction welding.
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