Modeling and Distribution Laws of Drilling Force for Staggered Teeth BTA Deep Hole Drill
Modeling and Distribution Laws of Drilling Force for Staggered Teeth BTA Deep Hole Drill
复制标题
交齿BTA深孔钻钻削力建模及分布规律
DOI：
10.1155/2018/3691468
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发表时间：
2018-01-01
影响因子：
--
通讯作者：
Guo, Bian
中科院分区：
文献类型：
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作者：
Li, Xubo;Zheng, Jianming;Guo, Bian
镗孔和套料协会（BTA）深孔钻削是一种典型的自导向加工方法。钻削力及其沿切削半径的分布规律直接影响钻削的稳定性和加工孔的质量。基于斜切削理论，开发了一种新颖的钻削力模型来预测可变几何形状的交错齿BTA深孔钻头的推力和扭矩。利用切削力分量与切削角之间的约束关系，结合进钻时的实测钻削力，得到了模型参数，包括沿切削半径切削力系数所涉及的法向剪切角、法向摩擦角和剪应力，以及导向块与孔壁之间的轴向和周向摩擦系数。模型预测的钻进力通过实验结果得到验证。
The boring and trepanning association (BTA) deep hole drilling is a typical self-guiding machining method. The drilling force and its distribution laws along the cutting radius directly affect the stability of drilling and the quality of machined hole. Based on the oblique cutting theory, a novel drilling force model is developed to predict the thrust and torque for staggered teeth BTA deep hole drill with variable geometries. Using the constraint relationships between the cutting force components and cutting angles, combined with the measured drilling force during the drill entrance, the parameters of the model including normal shear angle, normal friction angle and shear stress involved in the cutting force coefficients along the cutting radius, and the axial and circumferential friction coefficients between the guide pads and the hole wall are obtained. The model-predicted drilling force is validated by experimental results.