公开(公告)号：EP1714720B1

公开(公告)日：2011-05-18

申请号：EP04807698.8

申请日：2004-12-24

申请人： Sumitomo Electric Hardmetal Corp.

发明人： OKITA, Y.; c/o Sumitomo Electric Hardmetal Corp. ,  KANADA, Y.; c/o Sumitomo Electric Hardmetal Corp. ,  FUKAYA, T.; c/o Sumitomo Electric Hardmetal Corp.

IPC分类号： B23B27/22 ,  B23B27/20

CPC分类号： B23B27/143 ,  B23B2200/0428 ,  B23B2200/049 ,  B23B2200/28 ,  B23B2200/321 ,  B23B2200/3609 ,  B23B2226/125 ,  Y10T407/235 ,  Y10T407/24 ,  Y10T407/26 ,  Y10T407/27

摘要： A throw-away tip, wherein cemented carbide sintered bodies (1) containing cubic system boron nitride are joined to the apex parts (5) of a polygonal tool body (2) and cutting edges and tip breakers are formed on the cemented carbide sintered bodies (1). Chamfered parts are formed at the intersected parts of the upper surface to the side surfaces of the cemented carbide sintered body (1). The tip breaker comprises a projected part (6). An angle (θ) formed by ridge lines (6b, 6c) at the apex of the projected part (6) or a tangential line at a point bisecting the ridge lines (6b, 6c) and the bisector (9a) of an apex angle and the ratio of a distance (L1) between a first intersection point (P) where two ridge lines (6b, 6c) at the apex of the projected part (6) are intersected with each other and the end point (S) of one ridge line (6b) to a distance (L2) between a second intersection point (Q) of a straight-line passing the first intersection point (P) and the end point (S) to the outer periphery of the tool body (2) and the first intersection point (P) are within specified ranges.

公开(公告)号：EP1714720A1

公开(公告)日：2006-10-25

申请号：EP04807698.8

申请日：2004-12-24

申请人： Sumitomo Electric Hardmetal Corp.

发明人： OKITA, Y.; c/o Sumitomo Electric Hardmetal Corp. ,  KANADA, Y.; c/o Sumitomo Electric Hardmetal Corp. ,  FUKAYA, T.; c/o Sumitomo Electric Hardmetal Corp.

IPC分类号： B23B27/22 ,  B23B27/20

CPC分类号： B23B27/143 ,  B23B2200/0428 ,  B23B2200/049 ,  B23B2200/28 ,  B23B2200/321 ,  B23B2200/3609 ,  B23B2226/125 ,  Y10T407/235 ,  Y10T407/24 ,  Y10T407/26 ,  Y10T407/27

摘要： A superhard sintered body (1) containing cubic boron nitride is bonded to an apical angle part (5) of a tool body (2) having a polygonal shape, and an edge and a chip breaker are formed on the superhard sintered body (1). A chamfer is formed on the intersection between the upper surface and the side surface of the superhard sintered body (1), the chip breaker has a protrusion (6), and an angle θ formed by ridges (6b, 6c) on the apex of the protrusion (6) or a tangential line at a point bisecting the ridges (6b, 6c) and a bisector (9a) for the apical angle and the ratio of the distance (L1) between a first intersection (P) between the two ridges (6b, 6c) on the apex of the protrusion (6) and an extreme point (S) of the first ridge (6b) to the distance (L2) between a second intersection (Q) between a straight line passing through the first intersection (L1) and the extreme point (S) and the outer periphery of the tool body (2) and the first intersection (Q) are in prescribed ranges.

摘要翻译： 将包含立方氮化硼的超硬烧结体（1）接合到具有多边形的工具主体（2）的顶角部（5）上，并且在超硬烧结体（1）上形成边缘和断屑器， 。 在超硬烧结体（1）的上表面和侧面的交叉部分上形成有倒角，断屑器具有突起（6），并且在顶点上的脊（6b，6c）形成的角度 所述突起（6）或在将所述脊部（6b，6c）和与所述顶角之间的平分线（9a）平分的点处的切线和所述两个脊之间的第一交点（P）之间的距离（L1） （6）的顶点和第一脊（6b）的极限点（S）之间的距离（L2）的距离（L2）之间的距离（L2）在穿过第一交点的直线之间的第二交点（Q） （L1）和极点（S）以及工具主体（2）和第一交点（Q）的外周均处于规定范围内。