China Mechanical Engineering ›› 2024, Vol. 35 ›› Issue (02): 235-243.DOI: 10.3969/j.issn.1004-132X.2024.02.007

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Contrastive Experiments on Up and Down Grinding of Unidirectional Ceramic Matrix Composite C/SiC with Variable Angle

ZHANG Lifeng;WANG Zixu;ZHANG Wangtong;DENG Yunfei;SUI He;GUO Zhiyong   

  1. College of Aeronautical Engineering,Civil Aviation University of China,Tianjin,300300

  • Online:2024-02-25 Published:2024-04-12

单向陶瓷基复合材料C/SiC变角度顺逆磨的对比试验

张立峰;王梓旭;张旺通;邓云飞;隋翯;郭志永   

  1. 中国民航大学航空工程学院,天津,300300

  • 作者简介:张立峰,男,1983年生,讲师,硕士生导师。研究方向为航空材料精密加工技术、复合材料力学。发表论文30余篇。E-mail:zhanglifeng@tju.edu.cn。

Abstract: This paper investigated the impact mechanism of grinding forces and machined surface quality on unidirectional C/SiC by a regular dodecagon-based grinding track method. Comparative analysis reveal that up grinding reduces tangential forces by 10%~25%, normal forces by 30%~50%, and surface roughness by 25%~65%, compared to down grinding. Moreover, the fiber grinding angle has a pronounced impact on the grinding characteristics. When the fiber grinding angle is as 0°~90°, the magnitude ranking of grinding force from large to small is as 60°, 30°, 90°, 0°. When the fiber grinding angle is as 90°~180°, the magnitude ranking of grinding force from large to small is as 120°, 90°, 150°, 180°. The order of surface roughness Sa on the machined surface aligns with the grinding force magnitude ranking as 0°, 150°, 120°, 30°, 60°, 90°. A pronounced material deformation rebound effectiveness is observed in C/SiC grinding. A comparative analysis of surface microstructures at diverse fiber grinding angles, and a grinding material removal model was introduced.

Key words: composite, grinding angle, up and down grinding, material removal model

摘要: 通过正十二边形磨削轨迹测试方法研究了单向C/SiC的磨削力和加工表面质量的影响机制。研究发现,相较于顺磨,逆磨的切向磨削力减小10%~25%,法向磨削力减小30%~50%,表面粗糙度减小25%~65%;纤维磨削角对磨削特性具有显著影响,顺纤维磨削时,磨削力由大到小的纤维磨削角排序为60°、30°、90°、0°,逆纤维磨削时的排序为120°、90°、150°、180°;加工表面粗糙度Sa由大到小的纤维磨削角排序为0°、150°、120°、30°、60°、90°;C/SiC磨削加工时,材料的变形回弹效应较明显。对比了不同纤维磨削角下的表面微观形貌,提出了磨削材料去除模型。

关键词: 复合材料, 磨削角度, 顺/逆磨, 材料去除模型

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