铝基复合材料部件的超声波-振动-叠加端面车削用于加强摩擦-表面预处理

IF 3.3 Q2 ENGINEERING, MANUFACTURING
P. Eiselt, S. J. Hirsch, Ismail Ozdemir, A. Nestler, Thomas Grund, Andreas Schubert, T. Lampke
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引用次数: 0

摘要

铝基复合材料(AMC)是一组重要的高性能材料。由于具有特定强度和高导热性,这些复合材料已被考虑用于制动盘的大规模生产。然而,为了避免制动盘和制动衬片的严重磨损,有必要对摩擦表面进行预处理。这可以通过控制与市售制动衬片材料的摩擦以及形成转移层或反应层(摩擦表面)来实现。均匀的摩擦表面可使制动系统在中等制动条件下几乎无磨损。在这项工作中,使用针盘测试仪进行了预处理,目的是快速形成均匀、稳定的摩擦表面。研究了垂直于加工 AMC 表面摩擦方向的表面微刃对摩擦面形成速度和均匀性的影响。微刃是通过超声波-振动-叠加面车削产生的。因此,振动方向与被动力方向一致。出于研究目的,通过改变切削速度和进给量来改变微刃的距离。实验使用的是 AMC 圆盘试样,其中碳化硅颗粒的体积比例为 35%。使用 CVD 金刚石可转位刀片进行加工。使用 3D 激光扫描显微镜和扫描电子显微镜对预处理前后生成的表面进行了评估。结果表明,超声波振动叠加端面车削能有效地在 AMC 表面产生微切口。结果表明,微刃之间的距离越大,就越能形成稳定的摩擦表面。因此,摩擦系统很快就达到了稳定状态。因此,在实验室条件下,AMC摩擦表面微结构对摩擦表面生成的益处得到了证实。这些发现有助于高性能 AMC 制动系统的开发。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ultrasonic-Vibration-Superimposed Face Turning of Aluminium Matrix Composite Components for Enhancing Friction-Surface Preconditioning
Aluminium matrix composites (AMCs) represent an important group of high-performance materials. Due to their specific strength and a high thermal conductivity, these composites have been considered for the large-scale production of brake discs. However, preconditioning the friction surfaces is necessary to avoid severe wear of both the brake discs and the brake linings. This can be achieved through controlled friction against commercially available brake-lining materials and the formation of transfer or reactive layers (tribosurfaces). Homogeneous tribosurfaces allow for nearly wear-free brake systems under moderate brake conditions. In this work, preconditioning was carried out with a pin-on-disc tester, aiming for the fast creation of homogeneously formed and stable tribosurfaces. The influence of surface microedges perpendicular to the direction of friction on the machined AMC surfaces on the build-up speed and homogeneity of the tribosurfaces was investigated. The microedges were generated using ultrasonic-vibration-superimposed face turning. Thereby, the vibration direction corresponded to the direction of the passive force. For research purposes, the distance of the microedges was changed by varying the cutting speed and feed. The experiments were carried out using AMC disc specimens with a reinforcement content of a 35% volume proportion of silicon carbide particles. Machining was realised with CVD-diamond-tipped indexable inserts. The evaluation of the generated surfaces before and after preconditioning was achieved using 3D laser scanning microscopy and scanning electron microscopy. It was demonstrated that ultrasonic-vibration-superimposed face turning effectively generated microedges on the AMC surfaces. The results show that larger distances between the microedges enhanced the formation of stable tribosurfaces. Thus, the tribosystem’s steady state was reached quickly. Therefore, the benefits of AMC-friction-surface microstructuring on the generation of tribosurfaces under laboratory conditions were proven. These findings contribute to the development of high-performance AMC brake systems.
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来源期刊
Journal of Manufacturing and Materials Processing
Journal of Manufacturing and Materials Processing Engineering-Industrial and Manufacturing Engineering
CiteScore
5.10
自引率
6.20%
发文量
129
审稿时长
11 weeks
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