金刚石磨头芯子系用金属结合剂把金刚石磨粒牢固地粘结并均匀地分布在金刚石磨头芯子的表面而成。将金刚石磨头芯子安装在高速磨头(型号SD60B)的孔内,用来磨削φ2～φ6mm的孔。以前通常的金刚石磨头芯子,如图1所示。其缺点是结构复杂,加工困难,成本高。为此,我们对其进行了改进,改后的结构为弹簧夹头和磨头芯轴(见图2),使用时只需更换带磨粒的芯轴即可。经长期使用证明,改进后的磨头芯子有结构简单,加工方便, Diamond grinding core system with a metal bond to the diamond abrasive firmly bonded and evenly distributed in the surface of the diamond grinding head made. The diamond grindstone core is installed in the hole of the high-speed grinder (model SD60B) to grind the holes of φ2 ~ φ6mm. Previously common diamond grinding head, shown in Figure 1. The disadvantage is the complex structure, processing difficulties, high cost. To this end, we have improved it, the structure after the change for the collet chuck and grinding mandrel (see Figure 2), the use of just replace the mandrel with abrasive. After long-term use, the improved grinding head has the advantages of simple structure, convenient processing,