水射流辅助刀具切削钴结壳

Water jet assist cutter cutting cobalt crusts

为了减小钴结壳切削过程中产生的冲击载荷,提高集矿机的行走安全性,提出了水射流辅助刀具切削钴结壳的切削方法.分析了单个截齿切削钴结壳时的受力情况,建立了水射流辅助刀具切削钴结壳的力学模型,通过仿真计算获取了水射流压力和刀具在钴结壳表面产生初始裂纹所需最小切削力的作用规律.仿真结果表明:与纯刀具切削相比,当水射流作用点和刀具作用点重合时,刀具在钴结壳表面产生初始裂纹所需的最小切削力明显下降;随着水射流压力的增加,刀具所需的最小切削力急剧下降.开展了水射流辅助刀具切削钴结壳模拟料实验.实验结果表明:与纯刀具切削钴结壳相比,水射流辅助刀具切削钴结壳时,切削过程中冲击载荷的最大值明显下降,当射流压力为5 MPa时,冲击载荷的最大值下降约50%,有效值下降约10%.

In order to reduce impact load and improve working safety of miner,deepsea cobalt crusts cutting method of water jet assist cutter was proposed.Stress analysis of cutter cutting cobalt crusts with single teeth was analyzed and mechanical model of water jet assist cutter cutting deepsea cobalt crusts was established.With simulation calculation,the relationship between water jet pressure and minimum cutting force of cutter was obtained,which was needed to generate initial crack on cobalt crust surface.Simulation results are as follows： compared with cutter cutting,when water jet working point is overlap with cutter working point,the minimum cutting force is decreased.With the increasing of water jet pressure,the minimum cutting force decreased dramatic.Experiments of water jet assist cutter cutting cobalt crusts simulation material were carried out.Experimental results are as follows： compared with cutter cutting,the maximum impact load is decreased when water jet assist cutter cutting cobalt crusts.When water jet pressure is 5 MPa,the maximum impact load is decreased by 50% and the RMS impact load is decreased by 10%.