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本文对冲击凿入情况下钎头对岩石的动态凿入过程进行了理论分析和试验测定。结果表明,钎头刃长、冲击速度、钎刃初始凿入深度,及钎头与岩石的接触紧密程度都是影响凿入效率的重要因素。试验证明,硅光电池能够满足动态凿入过程中瞬间微量位移的测试要求,所测钎头凿深与间接计算结果十分吻合。对实际测定的凿入力-凿深曲线的分析表明,实际测定的凿入峰值力、凿入效率与理论分析基本一致。
In this paper, the rock drill head dynamic impacting process of rock excavation is theoretically analyzed and tested. The results show that the cutting edge length, the impact speed, the initial penetration depth of the brazing blade and the close contact between the bit and the rock are important factors affecting the efficiency of the cutting. The experiment proves that the silicon photovoltaic cell can meet the requirement of instant micro displacement in the process of dynamic cutting, and the bit depth of the measured bit agrees well with the indirect calculation result. The actual determination of the chisel penetration force - chisel depth curve analysis shows that the actual measured chipping peak force, chisel efficiency and theoretical analysis are basically the same.