\r林 彬^{1, 2}，李凯隆^{1, 2}，曹中臣^{1, 2}，姜向敏^{1, 2}，黄 田\r²\r
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AuthorsHTML:\r林 彬^{1, 2}，李凯隆^{1, 2}，曹中臣^{1, 2}，姜向敏^{1, 2}，黄 田\r²\r
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AuthorsListE:\rLin Bin^1,2，Li Kailong^1,2，Cao Zhongchen^1,2，Jiang Xiangmin^1,2，Huang Tian\r²\r
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AuthorsHTMLE:\rLin Bin^1,2，Li Kailong^1,2，Cao Zhongchen^1,2，Jiang Xiangmin^1,2，Huang Tian\r²\r
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Unit:\r\r1. 天津大学先进陶瓷与加工技术教育部重点实验室，天津 300350；\r
\r\r2. 天津大学机械工程学院，天津 300350\r
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Unit_EngLish:\r1. Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education，Tianjin University，Tianjin 300350，China；
2. School of Mechanical Engineering，Tianjin University，Tianjin 300350，China\r
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Abstract_Chinese:\r基于CCOS 技术原理，提出高效、高可控性的固结磨料确定性研磨工艺．通过线研磨实验发现采用中心供给研磨液方式相比于传统四周供液方式有利于提高加工效率及表面质量．分析了工艺参数对加工后表面硬度的影响，通过扫描电镜观察研磨后的表面形貌，分析固结磨料研磨的材料去除机制．通过不同参数线研磨实验验证了材料去除率与工具转速、载荷、时间呈线性关系，表明固结磨料研磨工艺的材料去除过程符合CCOS 的卷积迭代原理．基于晶胞理论和磨粒粒径均匀的假设，建立了固结磨料研磨垫表面形貌的仿真模型．同时，模型考虑了磨粒浓度、磨粒粒度、研磨垫形状参数的影响．在固结磨料研磨垫形貌仿真数据的基础上，基于硬脆材料去除机理以及研磨垫与工件微观接触模型，考虑工件表面的力学性能，建立了一定参数条件下研磨垫与工件的接触间隙计算模型，进而建立了单点研磨去除斑模型．通过定点研磨实验验证了不同压力、转速、时长条件下单点研磨去除斑模型的准确性．将连续的研磨轨迹进行离散，考虑研磨垫形状、磨粒的尺寸和浓度、研磨工具的转速和承受的载荷、轨迹参数建立了总去除量与单点研磨去除量的卷积运算关系，提出固结磨料确定性研磨表面生成模型．开展不同参数下面研磨实验与表面仿真．结果表明，固结磨料确定性研磨表面生成模型能很好地预测不同参数下研磨去除的深度和研磨表面的残留误差，提高固结磨料研磨工艺的可控性．\r
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Abstract_English:\rA highly efficient，controllable fixed abrasive deterministic lapping process based on the CCOS principle was proposed. Through the line lapping experiments，results indicate that the liquid central supply mode is beneficial to the improvement of process efficiency and surface quality compared with the traditional liquid supply mode. The influence of process parameters on the surface hardness after processing and the material removal mechanism of the fixed abrasive lapping was analyzed by scanning electron microscopy，in order to observe the surface topography of the workpiece after lapping. The linear relationships between the material removal rate and tool speed，load，time were verified by line lapping experiments with different parameters. Results reveal that the material removal process of the fixed abrasive lapping process conforms to the convolution iteration principle of CCOS. A simulation model of the surface topography of the fixed abrasive lapping pad was established based on the unit cell theory and the assumption of uniform abrasive particle size. At the same time，the effect of parameters, such as the size and concentration of the abrasive particles and the shape of the lapping pad，were considered in the model. Based on the simulation data of fixed abrasive lapping pad topography，the calculation model of the contact gap between the lapping pad and the
workpiece was established based on the removal mechanism of the hard and brittle material and the micro-contact model between the lapping pad and the workpiece. This process also considered the mechanical properties of the workpiece surface under certain parameters. Furthermore，the point lapping removal spot model was established. The accuracy rates of this model under different pressures，rotation speeds，durations were verified by point lapping experiments. After dispersing continuous machining trajectories，the convolution operation relationship between the total lapping removal and the point lapping removal was established by considering the shape of the lapping pad，the size and concentration of the abrasive particles，the rotational speed and the load of the lapping tool，and the trajectory parameters. The fixed abrasive lapping surface generation model was also proposed. Plane lapping experiments and surface simulations with different parameters were carried out. Results show that the fixed abrasive deterministic lapping surface generation model can predict the lapping removal depth and the residual error of the lapping surface under different parameters. The proposed model can also improve the controllability of the fixed abrasive lapping process.\r
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Keyword_Chinese:固结磨料研磨；工艺参数；表面生成模型；轨迹\r

Keywords_English:fixed abrasive lapping；process parameters；surface generation model；trajectory\r


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