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A quantitative study on improvement effect of interference fit disassembly damage reduction texture in bearing performance

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过盈配合拆解减损织构承载能力 提升效果的量化研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), May.2026, Vol.49 No.5: 591-597

DOI: 10.3969/j.issn.1003-5060.2026.05.003

Authors

ZHOU Dan $ ^{1} $, SHI Xinru $ ^{1} $, YU Tao $ ^{1} $, LYU Songjiang $ ^{2} $

(1. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China; 2. CRRC Nanjing Puzhen Co., Ltd., Nanjing 210031, China)

Abstract and Keywords

Abstract: Laser dimple texture can effectively reduce the disassembly damage of interference fit, and the hardened convex ringlike bulges around the texture strengthen the occlusion effect between interfaces, leading to the improvement of bearing performance. This paper studied on the detections and bearing experiments of the conventional surfaces, dimple-textured surfaces with and without bulges. The bearing area curve was preprocessed by the benchmark alignment and parameter value adjustment, and it was found that there was a close relationship between the peak parameters and the bearing performance. When the contact pressure was constant, the enhancement in bearing performance $ \Delta\mu $ brought by textures had a linear relationship with the 2/3 power of the peak material volume $ V_{mp} $. However, with the growth of $ V_{mp} $, the increase rate of $ \Delta\mu $ would gradually slow down. In the specific engineering practice, this linear relationship can be used as the basis of the fitting model of the experimental data to formulate a reasonable morphology repair target for the bearing performance recovery process of disassembly-damaged surfaces.

Keywords: laser texturing surface; bulge; bearing area curve; interference fit; bearing performance

作者信息

周丹 $ ^{1} $，石欣茹 $ ^{1} $，余涛 $ ^{1} $，吕松江 $ ^{2} $

(1. 合肥工业大学机械工程学院，安徽合肥 230009；2. 中车南京浦镇车辆有限公司，江苏南京 210031)

摘要和关键词

摘要: 凹坑型激光织构能有效降低过盈配合的拆解损伤,且织构周边的硬化环形凸起熔融层强化了配合界面间的咬合效应,有利于承载能力的提升。文章对无织构常规表面、保留熔融层的减损织构表面、去除熔融层的织构表面展开检测及承载试验研究。结果表明:表面支承率曲线在经基准对齐、参数取值方法修正预处理后,其峰部参数与承载能力间存在密切关系;当接触接触压力不变时,由减损织构带来的承载能力提升量 $ \Delta\mu $与其表面的峰部实体体积 $ V_{mp}^{2/3} $间存在线性关系;但随着 $ V_{mp} $的增加, $ \Delta\mu $的增长速率会逐渐放缓。在具体的工程实践中,该线性关系可作为试验数据的拟合模型基础,进而为拆解损伤表面的承载能力恢复工艺拟定合理的形貌修复目标。

关键词: 激光织构表面；熔融层；表面支承率曲线；过盈配合；承载能力

Funding

国家重点研发计划资助项目（2019YFC1908005）

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