The aim of this work is to simulate thermal deformation of tool system and investigate the influence of cutting parameters on it in single-point diamond turning(SPDT) of aluminum alloy. The experiments with various cu...The aim of this work is to simulate thermal deformation of tool system and investigate the influence of cutting parameters on it in single-point diamond turning(SPDT) of aluminum alloy. The experiments with various cutting parameters were conducted. Cutting temperature was measured by FLIR A315 infrared thermal imager. Tool wear was measured by scanning electron microscope(SEM). The numerical model of heat flux considering tool wear generated in cutting zone was established. Then two-step finite element method(FEM) simulations matching the experimental conditions were carried out to simulate the thermal deformation. In addition, the tests of deformation of tool system were performed to verify previous simulation results. And then the influence of cutting parameters on thermal deformation was investigated. The results show that the temperature and thermal deformation from simulations agree well with the results from experiments in the same conditions. The maximum thermal deformation of tool reaches to 7 μm. The average flank wear width and cutting speed are the dominant factors affecting thermal deformation, and the effective way to decrease the thermal deformation of tool is to control the tool wear and the cutting speed.展开更多
为提高单晶锗片抛光的表面质量和面型精度,基于ABAQUS建立了Φ9μm粒径的单晶金刚石磨粒与(111)晶向的单晶锗片作用的有限元模型,进行了变载仿真实验,分析了磨粒去除单晶锗片表面材料的机理,将单晶锗材料变形分为弹性变形、塑性变形、...为提高单晶锗片抛光的表面质量和面型精度,基于ABAQUS建立了Φ9μm粒径的单晶金刚石磨粒与(111)晶向的单晶锗片作用的有限元模型,进行了变载仿真实验,分析了磨粒去除单晶锗片表面材料的机理,将单晶锗材料变形分为弹性变形、塑性变形、脆塑转变和脆性破坏4个阶段,并得到了各阶段对应的加载力范围。进行了18、24、30和36 m N这4组恒载仿真实验,分析了单晶锗片产生边缘效应的原因,结果表明:加载力越大,边缘效应越明显。进行了加载力为58.8、78.4、98.0和117.6 N的4组抛光实验,使用原子力显微镜观察抛光后的表面三维形貌,使用粗糙度测量仪测量抛光后的表面轮廓。最终形貌呈现的材料变形规律以及轮廓呈现的加载力对边缘效应的影响规律均与仿真结果一致,证明了仿真的有效性。展开更多
基金Project(51175122)supported by the National Natural Science Foundation of China
文摘The aim of this work is to simulate thermal deformation of tool system and investigate the influence of cutting parameters on it in single-point diamond turning(SPDT) of aluminum alloy. The experiments with various cutting parameters were conducted. Cutting temperature was measured by FLIR A315 infrared thermal imager. Tool wear was measured by scanning electron microscope(SEM). The numerical model of heat flux considering tool wear generated in cutting zone was established. Then two-step finite element method(FEM) simulations matching the experimental conditions were carried out to simulate the thermal deformation. In addition, the tests of deformation of tool system were performed to verify previous simulation results. And then the influence of cutting parameters on thermal deformation was investigated. The results show that the temperature and thermal deformation from simulations agree well with the results from experiments in the same conditions. The maximum thermal deformation of tool reaches to 7 μm. The average flank wear width and cutting speed are the dominant factors affecting thermal deformation, and the effective way to decrease the thermal deformation of tool is to control the tool wear and the cutting speed.
文摘为提高单晶锗片抛光的表面质量和面型精度,基于ABAQUS建立了Φ9μm粒径的单晶金刚石磨粒与(111)晶向的单晶锗片作用的有限元模型,进行了变载仿真实验,分析了磨粒去除单晶锗片表面材料的机理,将单晶锗材料变形分为弹性变形、塑性变形、脆塑转变和脆性破坏4个阶段,并得到了各阶段对应的加载力范围。进行了18、24、30和36 m N这4组恒载仿真实验,分析了单晶锗片产生边缘效应的原因,结果表明:加载力越大,边缘效应越明显。进行了加载力为58.8、78.4、98.0和117.6 N的4组抛光实验,使用原子力显微镜观察抛光后的表面三维形貌,使用粗糙度测量仪测量抛光后的表面轮廓。最终形貌呈现的材料变形规律以及轮廓呈现的加载力对边缘效应的影响规律均与仿真结果一致,证明了仿真的有效性。
