-
公开(公告)号：US20060115339A1
公开(公告)日：2006-06-01
申请号：US11124095
申请日：2005-05-09
IPC分类号： B23B51/02
CPC分类号： B23B51/02 , B23B2251/201 , B23B2251/241 , B23B2251/282 , B23B2251/406 , H05K3/0047 , Y10T408/909 , Y10T408/9097
摘要： To provide a drill which has a small diameter but deteriorates neither in rigidity like the type having two cut blades and two chip discharging grooves nor in cutting chip discharging property like the type having one cut blade and one cutting chip discharge groove, and which is extremely excellent in practical use while performing the enhancement in hole position precision by a simple improvement, there is provided a drill in which a chisel edge 6 is provided at a tip end portion, a spiral first chip discharging groove 1 and a spiral second chip discharging groove 2 are provided, a land portion 3, 4 is provided between the first chip discharging groove 1 and the second chip discharging groove 2, and a cut blade 5 is provided at an edge of a rake surface 7 of the first chip discharging groove 1, characterized in that the first chip discharging groove 1 and the second chip discharging groove 2 are provided asymmetrically with respect to a drill rotational center O and a land portion 3 behind the first chip discharging groove 1 is larger than a land portion 4 behind the second chip discharging groove 2.
摘要翻译： 为了提供具有小直径的钻头，既不具有如具有两个切割刀片和两个切屑排出槽的类型的刚度也不像具有一个切割刀片和一个切屑排屑槽的类型那样具有切削屑排出性能的钻头，并且极端 通过简单的改进，在进行孔位精度的提高的同时，实用上是优异的，提供了一种钻头，其中在前端部设置有凿子边缘6，螺旋形的第一切屑排出槽1和螺旋形的第二切屑排出槽 如图2所示，在第一排屑槽1和第二排屑槽2之间设置有陆部区域3,4，并且在第一排屑槽1的前刀面7的边缘设置切割刀片5， 其特征在于，第一排屑槽1和第二排屑槽2相对于钻头旋转中心O和陆部3不对称地设置 第一排屑槽1的后方大于第二排屑槽2后面的陆部4。
-
公开(公告)号：US06613999B2
公开(公告)日：2003-09-02
申请号：US10001831
申请日：2001-11-19
申请人： Ichiro Katayama , Hideo Wakui
发明人： Ichiro Katayama , Hideo Wakui
IPC分类号： B23K904
CPC分类号： B23K11/20 , B23K11/115
摘要： A method of joining a sintered hard alloy member 1 such as a cylindrical rod-shaped twist drill bit blank made of material whose main component is tungsten carbide to a softer metal member such as a stainless steel shank 2 includes the steps of connecting the hard alloy member 1 and the metal member 2 to separate electrodes 3 and 4, applying a longitudinally directed force couple to the hard alloy member 1 and metal member 2 to press end faces of the members together to form an electrically conductive contact region, and passing a pulse of current through electrodes 3 and 4 of sufficient energy to melt the two end face regions of the members, thereby welding them together. Preferably, the end face of the metal member has a convex conical shape.
-
公开(公告)号：US07354229B2
公开(公告)日：2008-04-08
申请号：US11124095
申请日：2005-05-09
CPC分类号： B23B51/02 , B23B2251/201 , B23B2251/241 , B23B2251/282 , B23B2251/406 , H05K3/0047 , Y10T408/909 , Y10T408/9097
摘要： A drill including a chisel edge provided at a tip end portion, a spiral first chip discharging groove and a spiral second chip discharging groove, land portions provided between the first chip discharging groove and the second chip discharging groove, and a cut blade provided at an edge of a rake surface of the first chip discharging groove, characterized in that the first chip discharging groove and the second chip discharging groove are provided asymmetrically with respect to a drill rotational center and a land portion behind the first chip discharging groove is larger than a land portion behind the second chip discharging groove.
摘要翻译： 包括设置在前端部的凿边缘的钻头，螺旋形第一切屑排出槽和螺旋形第二切屑排出槽，设置在第一排屑槽和第二排屑槽之间的台架部， 第一排屑槽的前刀面的边缘，其特征在于，所述第一排屑槽和所述第二排屑槽相对于钻头旋转中心非对称地设置，所述第一排屑槽后面的台肩部分大于 第二排屑槽后面的地面部分。
-
-
搜索结果
3 条记录 (耗时 0.008 秒)
