单向陶瓷基复合材料C/SiC变角度顺逆磨的对比试验

doi:10.3969/j.issn.1004-132X.2024.02.007

摘要/Abstract

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

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

中图分类号:

TB332

张立峰, 王梓旭, 张旺通, 邓云飞, 隋翯, 郭志永. 单向陶瓷基复合材料C/SiC变角度顺逆磨的对比试验[J]. 中国机械工程, 2024, 35(02): 235-243.

ZHANG Lifeng, WANG Zixu, ZHANG Wangtong, DENG Yunfei, SUI He, GUO Zhiyong. Contrastive Experiments on Up and Down Grinding of Unidirectional Ceramic Matrix Composite C/SiC with Variable Angle[J]. China Mechanical Engineering, 2024, 35(02): 235-243.

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