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一、前言孔加工在机械加工工业中占有十分重要的地位。就其加工工作量而言,孔加工的工作量约占整个机械加工工作量的1/4左右。和其它刀具相比较,孔加工刀具的尺寸要受到孔径大小、形状和长度的限制,刀具的强度和刚度较差,加之切屑不易折断和排除,切削区的散热和冷却也比较困难,因此切削条件要严酷得多。孔加工刀具中使用量最大的是麻花钻,它是在实体材料上进行钻孔和扩孔的主要孔加工工刀具。钻削温度及其分布将直接影响钻削生产率的提高,影响钻头的磨损和耐用度,影响工件的表面质量和加工精度。因而,研究钻削加工温度场就具有重要的理论和实践意义。
First, the preface Hole machining in the machining industry occupies a very important position. In terms of its processing workload, hole processing workload accounts for about 1/4 of the entire machining workload. Compared with other tools, the size of hole machining tool is limited by the size, shape and length of the hole, the strength and rigidity of the tool is poor, and the chip is not easy to break and exclusion, cooling and cooling of the cutting area is also more difficult, so cutting conditions To be much harsh. The most widely used tool in hole drilling is a twist drill, which is a major hole cutter for drilling and reaming holes in solid materials. Drilling temperature and its distribution will directly affect the drilling productivity increase, affecting the wear and durability of the drill bit, affecting the surface quality of the workpiece and machining accuracy. Therefore, studying the temperature field of drilling has important theoretical and practical significance.