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1. 发明申请

US20140219736A1 Hole Saw and Method 审中-公开
标题翻译：孔锯和方法
公开(公告)号：US20140219736A1
公开(公告)日：2014-08-07
申请号：US13762161
申请日：2013-02-07
申请人： Chad Grenner
发明人： Chad Grenner
IPC分类号： B23B51/04 , B23B51/05
CPC分类号： B23B51/0426 , B23B2251/406 , B23B2251/64 , Y10T408/04 , Y10T408/8973
摘要： A breakage resistant hole saw that reduces damage of the pilot hole drill bit caused by the sudden contact of the cutting teeth on the hole saw's cutting body against the hard working surface after the drill bit has penetrated through the working surface. The hole saw disclosed herein includes a cylindrical cutting body mounted on an arbor. Formed on the circular lower edge of the cutting body is a plurality of angled teeth that cut through a working surface when rotated in one direction. Mounted on the end of the arbor is a pilot hole drill bit with a spiral cutting flute configured at a spiral cutting angle to penetrate the working surface when rotated in a direction opposite the cutting direction of the cutting teeth on the cutting body. Also disclosed herein is a method for forming a hole using a hole saw that reduces damage to the pilot hole drill bit.
摘要翻译：一种防破裂孔锯，可减少钻头穿透工作面后由钻孔切割体上的切割齿突然接触硬质加工面引起的导向孔钻头的损伤。本文公开的孔锯包括安装在心轴上的圆柱形切割体。形成在切割体的圆形下边缘上的是多个成角度的齿，当沿一个方向旋转时，它们穿过工作表面。安装在心轴的端部的是具有螺旋切割槽的导向孔钻头，其以螺旋切割角度构造，以在与切割体上的切割齿的切割方向相反的方向旋转时穿透工作表面。本文还公开了一种使用孔锯形成孔的方法，该孔减少了导向孔钻头的损坏。

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