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公开(公告)号：US5967712A
公开(公告)日：1999-10-19
申请号：US185477
申请日：1998-11-03
CPC分类号： B23B51/02 , B23D77/00 , B23B2251/245 , Y10T408/89 , Y10T408/906 , Y10T408/909 , Y10T408/9097
摘要： A cutting tool such as a drill or reamer for machining a bore in a workpiece is provided with at least one chamfered cutting edge on its distal end having an enlarged radial extent. The chamfered edge is defined between a tapered leading end, and an undercut end, and has a radial extent about 2.5% greater than the radial extent of the shaft of the tool. At least 40% of the length of the chamfered edge is substantially parallel to the axis of rotation of the tool shaft. The tapered and radially enlarged geometry of the chamfered cutting edge advantageously allows the drill or reamer to machine a bore in a workpiece formed from materials having significant spring-back characteristics, such as aluminum, titanium, or nickel alloys without sticking or galling during the machining operation, thereby greatly increasing tool life.
摘要翻译： 诸如用于在工件中加工孔的钻头或铰刀的切削工具在其远端上设置有至少一个具有扩大的径向范围的倒角切削刃。 倒角边缘限定在锥形前端和底切端之间，并且具有比工具的轴的径向范围大约2.5％的径向范围。 倒角边缘的长度的至少40％基本上平行于工具轴的旋转轴线。 倒角切削刃的锥形和径向扩大的几何形状有利地允许钻头或铰刀在由加工中具有大的回弹特性的材料（例如铝，钛或镍合金）形成的工件中加工孔，而在加工过程中不会发生粘附或磨损 操作，从而大大提高刀具寿命。
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2.发明授权Drill jig assembly having hydraulic chuck and drill guide with pilot bore 失效具有液压卡盘的钻具组件和具有导向孔的钻孔导向器
公开(公告)号：US5947657A
公开(公告)日：1999-09-07
申请号：US134395
申请日：1998-08-14
CPC分类号： B23B49/02 , Y10T279/17111 , Y10T408/455 , Y10T408/56245
摘要： A drill jig assembly for accurately supporting a drill relative to a workpiece is provided that includes a drill having a cylindrical shank, a chuck having a cylindrical exterior, and a hydraulically-operated collet for detachably gripping the drill shank, a housing tube for slidably and rotatably supporting the cylindrical exterior of the chuck, and a drill guide mounted on the distal end of the housing tube. The drill guide is formed from a carbide bushing having a pilot bore for rotatably receiving the cylindrical shank of the drill and maintaining a pilot concentric alignment between the bushing and the shank during a drilling operation. The use of hydraulic chuck in combination with the pilot bore of the carbide bushing allows the drill to accurately bore holes in a workpiece to very tight tolerances in a one-step, extend and retract drilling operation.
摘要翻译： 提供了一种用于相对于工件精确地支撑钻头的钻夹具组件，其包括具有圆柱形柄，具有圆柱形外部的卡盘和用于可拆卸地夹持钻柄的液压操作夹头的钻头，用于可滑动地和/ 可旋转地支撑卡盘的圆柱形外部，以及安装在壳体管的远端上的钻子引导件。 钻子引导器由具有导向孔的硬质合金衬套形成，用于可旋转地接收钻头的圆柱形柄，并且在钻井操作期间保持套管和柄之间的导向同心对准。 使用液压卡盘与硬质合金轴套的先导孔相结合，钻头可以在一步，延伸和缩回钻孔操作中精确地将工件中的孔钻孔到非常严格的公差。
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