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Investigation of belt-finishing effect on the residual stress field through repeated scratching on rough hard-turned surface
Tribology International ( IF 6.2 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.triboint.2020.106644
N. Bouktib , A. Khellouki

Abstract Belt-finishing process is renowned for its high capability to enhance surface integrity through scratching of the work-piece by means of multiple abrasive grains. In this work, the axial residual stress field induced by repeated scratch tests on an initial rough hard-turned surface is studied through numerical modeling. An analytical model is adopted to calculate the penetration depth and its evolution corresponding to the fixed indentation load and the number of scratching. The effect of the initial surface roughness, the loading conditions, the number of repeated scratching, and the coefficient of friction on the residual stress field, has been studied. The results show that whatever, the parameter's values, the affected layer doesn't exceed 11 μm. Moreover, the best compressive residual stress field is obtained for the highest loading conditions, the lowest initial surface roughness and friction coefficient. The numerical results are then used as qualitative evidence to describe the residual stress field evolution during a belt-finishing process, and to propose an optimum solution, ensuring the highest surface integrity during such a process.

中文翻译:

砂带精加工对粗糙硬车削表面重复划伤残余应力场的影响研究

摘要 砂带精加工工艺以其通过多种磨粒划伤工件来提高表面完整性的高能力而闻名。在这项工作中,通过数值建模研究了初始粗糙硬车削表面上重复划痕试验引起的轴向残余应力场。采用解析模型计算固定压痕载荷和划伤次数对应的穿透深度及其演变。已经研究了初始表面粗糙度、加载条件、重复刮擦次数和摩擦系数对残余应力场的影响。结果表明,无论参数值如何,受影响的层都不会超过 11 μm。而且,在最高载荷条件、最低初始表面粗糙度和摩擦系数下获得最佳压缩残余应力场。然后将数值结果用作定性证据来描述带精加工过程中的残余应力场演变,并提出最佳解决方案,以确保该过程中的最高表面完整性。
更新日期:2021-01-01
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