Shearing method for thin plate
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United States of America Patent
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-
Dec 16, 2008
Grant Date -
Dec 14, 2006
app pub date -
Aug 21, 2006
filing date -
Oct 13, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A shearing method for a thin plate including forming a protruded product part having a first sagging part when the thin plate with a thickness of up to approximately 5 mm is performed with a half die cutting by pressing the half die cutting punch slightly larger than the half die cutting hole to form a shallow recessed part, fixing the product part by a fixing member, forming a second sagging part at an edge portion of the thin plate by pressurizing a scrap part by moving a pressure punch which is provided with a gap between the fixing member and the pressure punch and by being bent between the scrap part and the product part, and then separating the scrap part from the product part.
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