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Theoretical Research and Verification on the Porosity of Semi-fixed Abrasive Tool

机译：半固定式磨具孔隙率的理论研究与验证

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摘要

Semi-fixed abrasive tool is a new developed grinding wheel which can adjust abrasive grain near the workpiece-abrasive interface according to the situation of the hard and large grits, damaged surface layer generated by the scratch or crack could be decreased when using semi-fixed wheel. Porosity, one of the most important parameters to evaluate trap effect, was studied based on the analysis of uniform scratch and it's effect on the polishing time, contact models between circle abrasive grain, line boundary and circle boundary were deduced to investigate the relations between engagement depth and the ratio of normal force to normal elastic stiffness. Theoretical research results show that semi-fixed grinding wheel should be conditioned after it's compaction for the boundary between abrasive grain and line boundary is unstable, the contact status is stable for internal abrasive grain, predicted porosity value agree well with that measured in the experiment, the shear strength of semi-fixed abrasive tool can meet the demand of lapping and polishing processes.
机译：半固定式磨具是一种新开发的砂轮，可根据硬质大颗粒的情况调整工件-磨具界面附近的磨料颗粒，使用半固定式磨具可以减少刮擦或裂纹产生的损坏表面层轮。在均匀划痕分析的基础上，研究了孔隙率是评价陷阱效应的最重要参数之一，并研究了其对抛光时间的影响，推导了圆形磨粒，线边界和圆边界之间的接触模型，研究了啮合关系。深度和法向力与法向弹性刚度的比率。理论研究结果表明，半固定砂轮在压实后应进行处理，以使磨粒与线边界之间的边界不稳定，内部磨粒的接触状态稳定，预测的孔隙率与实验测得的值相吻合，半固定式磨具的剪切强度可以满足研磨和抛光工艺的要求。

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  • 来源
    《Key Engineering Materials》 |2009年第2009期|411-415|共5页
  • 作者

    Donghui Wen; Xun Lv; Julong Yuan;

  • 作者单位

    Key Laboratory of Mechanical Manufacture and Automation, Ministry of Education, Zhejiang University of Technology, Hangzhou, China, 310032;

    Key Laboratory of Mechanical Manufacture and Automation, Ministry of Education, Zhejiang University of Technology, Hangzhou, China, 310032;

    Key Laboratory of Mechanical Manufacture and Automation, Ministry of Education, Zhejiang University of Technology, Hangzhou, China, 310032;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    semi-fixed abrasive tool; porosity; line boundary; circle boundary;

    机译：半固定式研磨工具;孔隙率线边界圆边界;

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