钻孔切削刀片

• Format: Patent
• Language: Chinese
• Published: 14.09.2016
• Subjects: BORING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; TRANSPORTING; TURNING

本发明提供种钻孔切削刀片，钻孔切削刀片具有顶面、底面、将顶面与底面连接在起的外围侧表面，以及在侧表面与顶面之间的过渡处形成的切削刃。形成切削刃，从而使得形成n个相同的切角以及n个相同的部分切削刃，部分切削刃在每种情况下在两个切角之间延伸，其中n∈{3，4}。n个部分切削刃中的每者具有：邻接第切角、在顶面的平面图中为直线的主要边缘；邻接另个切角、在顶面的平面图中为直线的次级边缘；以及过渡部分，通过过渡部分主要边缘与次级边缘彼此合并，并且过渡部分具有邻接主要边缘的凸面部分以及邻接次级边缘的凹面部分。在顶面的平面图中，主要边缘以及次级边缘在外侧上彼此围成角度α，其中α<180°。 A drill cutting insert has a cutting edge at a transition between a side surface and a top side which is formed with n identical cutting corners and n identical partial cutting edges -with nε{3, 4} -extending between the cutting corners. Each of the n partial cutting edges has: adjoining a first cutting corner, a main lip which is straight in plan view of the top side; adjoining the other cutting corner, a secondary lip which is straight in plain view of the top side, and a transition section, via which the main lip and the secondary lip merge into one another and which has a convex section adjoining the main lip and a concave section adjoining the secondary lip. The main and secondary lips enclose on the outside an angle a