激光加工表面微织构对陶瓷刀具摩擦磨损性能的影响

发布时间：2018-07-05 16:50

本文选题：微织构 + 陶瓷刀具　；参考：《表面技术》2015年10期

【摘要】：目的优选陶瓷刀具表面微织构形貌,以获得减摩性能较好的微织构。方法采用摩擦磨损实验,单因素研究微织构对陶瓷刀具摩擦磨损性能的影响。测定不同形貌织构刀具的表面摩擦系数,对比其表面磨损形貌,并通过有限元分析软件ABAQUS对微织构表面摩擦过程进行有限元仿真分析,研究不同织构对刀具应力分布的影响。结果在载荷90 N、转速300 r/min、时间30 min的条件下进行摩擦磨损实验,无织构刀具表面摩擦系数约为0.42;放射状微织构刀具的微织构方向与对磨副运动方向垂直,其摩擦系数最低,约为0.35。有限元仿真分析表明,无织构刀具应力集中出现在对磨副与刀具接触的前沿,约16.68~18.19 MPa,应力集中容易引起局部磨损;微织构方向与速度方向垂直时,等效应力值约为21.96~31.37 MPa,应力分布更为均匀,应力较大值分布在微织构沟槽的两侧,刀具更耐磨。结论相比于无织构刀具,加工微织构会使得刀具表面摩擦系数降低,耐磨损性能提高,应力分布更为均匀。
[Abstract]:Objective to select the surface microtexture of ceramic tools to obtain better antifriction microtexture. Methods the effects of microtexture on the friction and wear properties of ceramic cutting tools were investigated by friction and wear experiments. The surface friction coefficient of different texture cutting tools was measured and the surface wear morphology was compared. The finite element simulation analysis was carried out by using finite element analysis software Abaqus to study the influence of different textures on the stress distribution of the cutting tools. Results the friction and wear experiments were carried out under the condition of load 90 N, rotational speed 300 r / min and time 30 min. The friction coefficient of the surface of the non-texture cutting tool was about 0.42, the direction of the radial microtexture tool was vertical to the direction of movement of the pair, and the friction coefficient of the radial microtexture tool was the lowest. About 0.35. The finite element simulation analysis shows that the stress concentration of the non-texture cutting tool appears at the front of the contact between the pair and the tool, about 16.68 ~ 18.19 MPa, and the stress concentration can easily cause local wear, and when the direction of microtexture is perpendicular to the direction of velocity, The equal effect force value is about 21.96 ~ 31.37 MPa, the stress distribution is more uniform, the larger stress value is distributed on both sides of the micro-texture groove, and the tool is more wear-resistant. Conclusion compared with the non-texture cutting tool, the surface friction coefficient of the cutting tool is reduced, the wear resistance is improved and the stress distribution is more uniform.
【作者单位】：广东工业大学机电工程学院;
【基金】：国家自然科学基金(50675038,51175092) 广东省科技计划项目促进科技服务业发展专项计划(2010A040203002) 省部产学研结合科技创新平台项目(2011A091000002)~~
【分类号】：TG71;TG665

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