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Thermal analysis and machinability for laser-assisted machining of fused silica

机译：熔融二氧化硅激光辅助加工的热分析和可加工性

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摘要

Machining of fused silica to obtain high precision dimension and surface property has been an industry wide problem. In this study, laser-assisted machining (LAM) of fused silica has been introduced with three-dimensional thermal models been built to perform detailed analysis. The accuracy of the model is validated by measuring the temperature of workpiece and poly crystalline diamond (PCD) tool. The appropriate combination of machining parameters has been analyzed, as well as the temperature distribution at material removal layer, cutting zone of workpiece and PCD tool. A uniform temperature distribution is obtained at workpiece surface, with a very small temperature gradient of 20 K at the radial depth range of 100 μm after preheating. Although the temperature at cutting zone of workpiece is 1490 K, it is much lower at nose of tool with a value of 510 K, which is contrary with common belief. In addition, the experiments under higher temperature in LAM and lower temperature in conventional machining (CM) are carried out to study the machinability with respect to subsurface damage, chip morphology and tool wear. The results indicate that the machinability in LAM of fused silica is greatly improved, attributed to the maintenance of excellent performance of the PCD tool, and along with the changes in hardness, strength and viscoplasticity of fused silica.
机译：加工融合二氧化硅以获得高精度尺寸和表面特性一直是一个行业广泛的问题。在该研究中，已经引入了熔融二氧化硅的激光辅助加工（LAM），其中建成了三维热模型来进行详细分析。通过测量工件的温度和聚结晶金刚石（PCD）工具来验证模型的精度。已经分析了加工参数的适当组合，以及材料去除层的温度分布，工件切割区域和PCD工具。在工件表面处获得均匀的温度分布，在预热后，在径向深度范围为100μm的温度梯度的温度梯度非常小。虽然工件切割区域的温度为1490 k，但在工具的鼻子下有要较低的值，其值为510 k，这与常见的信念相反。另外，在林和较低温度下进行常规加工（CM）的实验，以研究相对于地下损伤，芯片形态和工具磨损的可加工性。结果表明，熔融二氧化硅的LAM的加工性大大提高，归因于维持PCD工具的优异性能，以及熔融二氧化硅的硬度，强度和粘塑性的变化。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2020年第2期|119078.1-119078.12|共12页
  • 作者

    Guoqi Ren; Huawei Song; Jinqi Dan; Jialun Li; Pengfei Pan; Zuohui Yang; Junfeng Xiao; Jianfeng Xu;

  • 作者单位

    State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Fused silica; Laser-assisted machining; Thermal analysis; Machinability; Tool wear;

    机译：融合二氧化硅;激光辅助加工;热分析;可加工性;工具磨损;

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