阅读说明：本技术 一种无横刃径向折线刃微小深孔钻削刀具 (Small deep hole drilling tool without cross-edge radial broken line edge ) 是由 梁志强 马悦 杜宇超 陈锐 栾晓圣 周天丰 王西彬 杨洪建 仇天阳 赵斌 于 2021-06-22 设计创作，主要内容包括：本发明涉及一种无横刃径向折线刃微小深孔钻削刀具,包括钻尖及钻体,所述钻尖包括折线刃、径向主切削刃、径向内刃、后刀面、沟槽、钻心尖,钻体上设置有螺旋槽和刃带,径向主切削刃和径向内刃的延长线均通过钻心点；通过修磨径向主切削刃和后刀面形成沟槽,通过横刃修磨方法完全消除横刃形成钻心尖。本发明提供的无横刃径向折线刃微小深孔钻削刀具,可以调节钻头刃口处的前角分布和切削厚度分布状况,具有良好的分屑、排屑效果和定心性能,能够有效降低钻削过程中的钻削力,提高刀具使用寿命和微小深孔加工质量,适用于难加工材料微小深孔的高效、高质量加工。(The invention relates to a tiny deep hole drilling tool with a radial broken line edge without a cross edge, which comprises a drill point and a drill body, wherein the drill point comprises a broken line edge, a radial main cutting edge, a radial inner edge, a rear cutter face, a groove and a drill point, a spiral groove and an edge band are arranged on the drill body, and extension lines of the radial main cutting edge and the radial inner edge pass through a drill point; the radial main cutting edge and the rear cutter face are polished to form a groove, and the chisel edge is completely eliminated by a chisel edge polishing method to form a drill point. The micro deep hole drilling tool without the chisel edge radial broken line edge can adjust the distribution of the front angles and the distribution of the cutting thickness at the cutting edge of a drill bit, has good chip separation and removal effects and centering performance, can effectively reduce the drilling force in the drilling process, prolongs the service life of the tool and improves the machining quality of micro deep holes, and is suitable for high-efficiency and high-quality machining of micro deep holes made of materials difficult to machine.)