镐形截齿截岩过程的温度场研究

为研究不同运行参数下镐形截齿的温度分布及其变化规律,在ABAQUS软件中建立截齿截割岩石有限元模型,并进行热力耦合仿真分析,得到不同运行参数下截齿的温度分布云图以及截割过程的温度随时间变化曲线。研究结果表明:其他条件一定时,随着截割速度的增大,齿尖升温速度及平衡温度增大,但温度分布无明显变化;截割深度的变化对平衡温度及温度分布二者皆有明显的影响,随着截割深度增大,高温区域由齿尖逐渐向齿体扩展;锥角的变化对温升速度和平衡温度无明显影响,但对温度场有明显影响,温度分布面积随着锥角的增大而增大。为进一步研究截齿磨损及失效提供理论依据。

Research on Temperature Fields of Conical Pick Cutting Rock

The purpose of study the temperature distribution and change law of conical pick under different operating parameters,the finite element model of cutting rock was established in ABAQUS software,and thermo-mechanical coupling simulation analysis was carried out to obtain the cloud diagram of temperature distribution of pick under different operating parameters and the temperature change curve with time during the cutting process.The results show that when other conditions are certain,with the increase of cutting speed,the heating speed and equilibrium temperature of the pick tip increase,but the temperature distribution does not change significantly.The change of cutting depth has obvious influence on equilibrium temperature and temperature distribution,with the increase of cutting depth,the high temperature area gradually extends from the pick tip to the pick body.The change of cone angle has no obvious influence on the temperature rise velocity and equilibrium temperature,but has obvious influence on the temperature field,the temperature distribution area increases with the increase of cone angle.Provided a theoretical basis for the further study on the wear and failure of pick.