Shearing die and method for manufacturing the same
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United States of America Patent
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Apr 28, 2015
Grant Date -
Dec 29, 2011
app pub date -
Jun 28, 2011
filing date -
Jun 29, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention provides a shearing die having longer life and a method for manufacturing the same. The shearing die includes a pair of substrates, at least one of which has a hard film formed by an arc ion plating method and located at least on a region of a curved surface and on an adjacent region from the end part of the curved surface on the side facing to the surface of the sheet or plate material to 300 μm along the surface of the substrate. The hard film comprises Al and one or more of Ti and Cr, and has a thickness of 1 to 5 μm, such that a number of metal particles having a diameter of 20 μm or more, which are present on a line segment having a length of 10 mm on a surface of the hard film, is 2 or less.
First Claim
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International Classification(s)
- C23C:COATING METALLIC MATERIAL; COATING MATERIAL WITH M....
- B26D:CUTTING; DETAILS COMMON TO MACHINES FOR SEVERING, ....
- B23P:OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVE....
- B21D:WORKING OR PROCESSING OF SHEET METAL OR METAL TUBE....
- B32B:LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA....
- B23D:PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FI....
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