Hinge barrel and manufacturing method thereof
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United States of America Patent
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app pub date -
Aug 27, 2007
filing date -
Jul 3, 2007
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Abandoned
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Abstract
The present invention includes fabricating a raw metal through a first rolling process to form a body having a base, a bracing portion and a holding trough; placing a forming strut in the holding trough; fabricating the body held the forming strut through a second rolling process to form the bracing portion in an arched shape with the inner side in contact with the forming strut; treating the body with the arched bracing portion and the forming strut in a heat treatment to enhance the hardness; and cutting off the body at a selected length and removing the forming strut to become a finished product of the hinge barrel. The hinge barrel thus formed can provide a required steady friction coefficient. It is simply structured and can be fabricated with a lower force. The probability of product defects resulting from too much or too little friction coefficient can be prevented.
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