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公开(公告)号：EP1549460B1
公开(公告)日：2008-06-18
申请号：EP03776192.1
申请日：2003-09-26
IPC分类号： B24B3/24
摘要： A drill sharpener is provided which has a point-splitting port which simplifies the procedure for producing a split point on a drill bit (200) undergoing sharpening. The point-splitting port (40) is positioned relative to a grinding wheel assembly (14) such that, when the drill held by a chuck (100) that is advanced toward the grinding wheel, a flute of the drill at the drill tip is brought into contact with the grinding wheel. The port has alignment stops (42) therein which mate with flats provided on the barrel of the chuck to ensure proper alignment of the chuck and drill relative to the grinding wheel. The stops also limit the extent of inward travel of the chuck and drill to a predetermined distance. A debris or grit collection tube (60) is also provided to be inserted into an unused port of the drill sharpener, to contain and confine any debris or grit attempting to exit the sharpener through the unused port.
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公开(公告)号：EP1549460A2
公开(公告)日：2005-07-06
申请号：EP03776192.1
申请日：2003-09-26
摘要： A drill sharpener is provided which has a point-splitting port which simplifies the procedure for producing a split point on a drill bit (200) undergoing sharpening. The point-splitting port (40) is positioned relative to a grinding wheel assembly (14) such that, when the drill held by a chuck (100) that is advanced toward the grinding wheel, a flute of the drill at the drill tip is brought into contact with the grinding wheel. The port has alignment stops (42) therein which mate with flats provided on the barrel of the chuck to ensure proper alignment of the chuck and drill relative to the grinding wheel. The stops also limit the extent of inward travel of the chuck and drill to a predetermined distance. A debris or grit collection tube (60) is also provided to be inserted into an unused port of the drill sharpener, to contain and confine any debris or grit attempting to exit the sharpener through the unused port.
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公开(公告)号：EP2001635A2
公开(公告)日：2008-12-17
申请号：EP06850598.1
申请日：2006-12-21
IPC分类号： B24B3/16
摘要： A tool sharpening assembly (100) suitable for sharpening cutting tools (140,350,366,546,562). In some embodiments, a wedge-shaped port is formed between a rotational first abrasive surface (160,262) and a stationary second abrasive surface (162,264) to sharpen a distal cutting edge (146) of a cutting tool (140,230,546). In other embodiments, a cooling mechanism (136,326,330,334,338) actively draws heat generated during a sharpening operation from a tool (140) and through a tool support structure (170,234,328,332) contactingly supporting the tool, hi further embodiments, a rotatable abrasive slotted disc (364) comprises at least one inspection aperture (372) formed from an interior sidewall (390) with upper and lower leading and trailing edges (396,398,400,402) of non-uniform separation distance. In other embodiments, a cylindrical drum abrasive member (572) is provided with an associated stationary support plate (574). In further embodiments, a grinding wheel (580,600) is formed of a substrate (582,602) and a plurality of abrasive layers (584,586,592,612,614) adhered thereto.
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