Calculation of Fit Tolerance with Clearance to Increase Relative Wear Resistance of Joints

IF 0.5 4区 工程技术 Q4 ENGINEERING, MECHANICAL
O. A. Leonov, N. Z. Shkaruba, G. N. Temasova, Y. G. Vergazova, P. V. Golinitskiy
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Abstract

The total resource of the assembly unit, as well as the post-repair resource of the unit, depend on the specified resource for critical joints. The main problem of calculating the joint accuracy is to determine the margin of accuracy or the margin of material for wear since an increase in the estimated fit tolerance will lead to a decrease in durability, and its decrease will entail an increase in costs due to an increase in rejects or the need to introduce a technological operation. In this regard, a method for calculating the joint fit tolerance depending on the specified or design wear characteristics was developed based on the analysis of the parametric failure model. When modeling various wear rates, it is recommended to use the relative wear resistance of the joint in the obtained dependences only if the wear function is approximated in a linear form. An expression for calculating the relative wear resistance of a joint is obtained depending on the wear resistance of the surfaces of the parts that form it. Using the example of calculating the fit tolerance of a rolling bearing operating under hydrodynamic friction conditions, the resulting fits are analyzed at a certain resource of no-failure operation of the joint for cases of increasing the wear resistance of the joint by 10 and 20%. The scientific novelty of the research lies in obtaining a theoretical relation between the fit tolerance and the probabilistic characteristics of the wear process at a specified probability of failure-free operation. The practical significance of research is expressed in the possibility of calculating the accuracy parameters of a particular joint at a specified resource.

Abstract Image

用间隙计算配合公差以提高接头的相对耐磨性
装配单元的总资源以及单元的修复后资源取决于关键接头的指定资源。计算接头精度的主要问题是确定精度裕度或材料磨损裕度,因为估计的配合公差的增加将导致耐用性的降低,而其降低将导致成本的增加,这是由于不合格品的增加或引入技术操作的需要。在这方面,基于对参数失效模型的分析,开发了一种根据指定或设计磨损特性计算接头配合公差的方法。当对各种磨损率进行建模时,建议仅当磨损函数近似为线性形式时,才使用获得的依赖关系中的接头的相对耐磨性。根据形成接头的零件表面的耐磨性,可以获得计算接头相对耐磨性的表达式。以计算在流体动力摩擦条件下运行的滚动轴承的配合公差为例,分析了在一定的接头无故障运行资源下,在将接头耐磨性提高10%和20%的情况下产生的配合。该研究的科学新颖性在于,在特定的无故障运行概率下,获得了配合公差与磨损过程的概率特征之间的理论关系。研究的实际意义体现在计算特定资源下特定节理的精度参数的可能性上。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Friction and Wear
Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
1.50
自引率
28.60%
发文量
21
审稿时长
6-12 weeks
期刊介绍: Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.
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