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为提高地下钻进机器人钻头的钻进效率,针对挤扩钻头的不同部位进行了力学分析,建立了钻头所需扭矩与钻进压力的数学模型;基于柱孔扩张理论,确定了钻头上各处挤扩应力的分布情况,得出了扭矩和钻进压力的计算表达式,通过对比实验数据,验证了计算方法的正确性。在此基础上,分析了螺旋角和螺纹宽度对钻头所需扭矩的影响,优化了挤扩钻头的结构参数。
In order to improve the drilling efficiency of underground drilled drill bits, the mechanical analysis of different parts of drilled drill bits was carried out, and the mathematical model of bit torque and drilling pressure was established. Based on the theory of column bore hole expansion, Squeezing and expanding the distribution of stress, obtained the calculation of torque and drilling pressure expression, by comparing the experimental data to verify the correctness of the calculation method. On this basis, the influence of the helix angle and the thread width on the torque required by the drill bit is analyzed, and the structural parameters of the drill bit are optimized.