To Increase Wear Resistance of Screw Cylindrical Compression Springs Working with Coil Contacts

IF 0.5 4区 工程技术 Q4 ENGINEERING, MECHANICAL Journal of Friction and Wear Pub Date : 2024-11-08 DOI:10.3103/S1068366624700247
N. A. Zemlyanushnov, N. Y. Zemlyanushnova
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Abstract

During operation of springs, especially cyclic buffer and high-speed springs, there are inevitable relative movements of their surfaces, friction, and coil contacts. Due to friction, a lot of energy is converted into thermal energy, this is а cause of spring wear on the contact points of the coils and of overheating of the machines and mechanisms. The known methods of increasing spring resourcefulness do not consider the issue of friction and wear of springs surfaces contact. Тhe new technologies for increasing the wear resistance of compression springs using contact predeformation are presented in the article. In this case, an additional axial load exceeding the load on the spring in the product by more than 5% and determined theoretically at the stage of development of the technological process is applied to the compressed spring coils into contact. The exposure time under axial load is 1–1.5 s. Serial springs were manufactured and two batches of experimental springs were produced using new technologies. The dispersion of the force parameters of the springs of experimental batch No. 1 as compared with serial springs was reduced by 14.3%, and as compared with experimental batch No. 2 by 42.9%. After cyclic tests the decrease of workload for serial springs averaged 1.17%; for springs of experimental batch No. 1, 0.23%; for springs of experimental batch No. 2, 0.45%. Contact clamping not only promotes the formation of useful residual stresses, but also increases the bearing capacity of the springs. The strip of hardened material is formed, which increases the wear resistance of the contacting surfaces of the coils and reduces friction due to parallel layering. On the contact places of the spring coils, the specific pressure decreases and the deformation wear resistance of the springs increases. Therefore, contact clamping should also be considered as a finishing operation to reduce friction on the places of contact of the spring’s coils and increasing their wear resistance.

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提高螺旋圆柱压缩弹簧的耐磨性
弹簧,尤其是循环缓冲弹簧和高速弹簧,在运行过程中,其表面不可避免地会发生相对运动、摩擦和线圈接触。由于摩擦,大量能量转化为热能,这是造成弹簧线圈接触点磨损以及机器和机构过热的一个原因。已知的提高弹簧灵活性的方法并未考虑弹簧接触面的摩擦和磨损问题。本文介绍了利用接触预变形提高压缩弹簧耐磨性的新技术。在这种情况下,对接触的压缩弹簧线圈施加的额外轴向载荷超过产品中弹簧载荷的 5%,该载荷是在技术工艺开发阶段从理论上确定的。轴向载荷下的暴露时间为 1-1.5 秒。采用新技术生产了系列弹簧和两批实验弹簧。与系列弹簧相比,1 号实验批次弹簧的力参数离散度降低了 14.3%,与 2 号实验批次弹簧相比,降低了 42.9%。循环测试后,系列弹簧的工作量平均减少了 1.17%;1 号实验批次弹簧减少了 0.23%;2 号实验批次弹簧减少了 0.45%。接触夹紧不仅能促进有用残余应力的形成,还能提高弹簧的承载能力。硬化材料条的形成,提高了线圈接触面的耐磨性,减少了平行分层造成的摩擦。在弹簧线圈的接触面上,比压减小,弹簧的变形耐磨性增加。因此,接触夹紧也应被视为一种精加工操作,以减少弹簧线圈接触面的摩擦并增加其耐磨性。
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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.
期刊最新文献
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