【摘要】 为满足钛合金类难加工材料工件钻削加工的精度，提高加工效率并降低生产成本，本文通过理论分析、数值模拟以及实验相结合的方法，针对钻削过程的断屑问题设计断屑槽结构，并开展断屑槽作用下的轴向力、断屑过程、应变状态以及不同加工参数下的切屑形态等方面的研究。结果表明，实验与仿真的最大轴向力误差在10%～20%，且断屑形貌吻合较好，从而证实了有限元模型的可靠性。切屑长度随进给量减小而减小；在不同加工参数下，含断屑槽的钻头轴向力均小于无槽时的；切屑与反屑面的接触使得切屑产生卷曲，卷曲程度及所受应力随刀具进给量增大而增大。更多还原

【Abstract】 In order to meet the accuracy of drilling workpieces of difficult-to-machine materials, such as titanium alloys,while improving processing efficiency and reducing production costs,this paper presents a combination of theoretical analysis, numerical simulation and experiment. he chip breaker structure is designed for the chip breaking problem in the drilling process, and the thrust force, chip breaking process, strain state and chip shape under different machining parameters are studied. The results show that the maximum thrust force error between the experimental and simulated data ranges from 10% to 20%, and the chip fracture morphology aligns closely,confirming the reliability of the finite element model. The chip length decreases as the feed decreases; Under different processing parameters, the thrust force of the drill bit with chip breaker is less than that without groove; The interaction between the chip and the chip surface leads to curling,with both the degree of curl and the stress increasing as the tool feed rate rises.更多还原