公开(公告)号：US6135681A

公开(公告)日：2000-10-24

申请号：US137647

申请日：1998-08-21

申请人： Joseph P. Nuzzi ,  Timothy G. Stokey ,  William H. Stokey

发明人： Joseph P. Nuzzi ,  Timothy G. Stokey ,  William H. Stokey

IPC分类号： B23B51/00

CPC分类号： B23B51/0009 ,  B23B2251/48 ,  B23B2251/50 ,  Y10S408/713 ,  Y10T407/1948 ,  Y10T407/245 ,  Y10T408/9065 ,  Y10T408/909 ,  Y10T408/9098

摘要： The present invention is a drilling system for cutting flat bottomed holes in work pieces. The tool has two opposing angled cutting edges extending from a rotational axis, with the inner portions of these cutting edges extending upwardly to create an overlapping web at the center. The overlapping web strengthens the center portion of the cuttings edges of the tool. The angle at which the inner portion of the cutting edge is inclined can be increased to create a center point on the cutting surface of the tool. The center point adds stability to the tool as it rotates along its longitudinal axis. The cutting edge has a rake surface with a positive rake angle that lessens the forces on the insert and also allows for better formation of chips of stock material being removed. Chip breakers can be cut into the cutting edges of the insert, further aiding in the removal of stock material.

摘要翻译： 本发明是一种用于切割工件中的平底孔的钻孔系统。 该工具具有从旋转轴线延伸的两个相对的倾斜的切割边缘，这些切割边缘的内部部分向上延伸以在中心形成重叠的卷材。 重叠的网加强了工具的切屑边缘的中心部分。 可以增加切削刃的内部部分倾斜的角度，以在工具的切割表面上产生中心点。 中心点在刀具沿其纵向轴线旋转时增加了刀具的稳定性。 切削刃具有具有正前角的前刀面，其减小刀片上的力并且还允许更好地形成被去除的原料的切屑。 切屑可以切入刀片的切削刃，进一步帮助切削材料。