CFRP二次切削加工表面的形成机理及试验研究  

Formation Mechanism and Experimental Study of CFRP Secondary Cutting Surface

作　　者：李纯杰 苏飞 刘广涛 陈冰 郑雷[2] LI Chunjie;SU Fei;LIU Guangtao;CHEN Bing;ZHENG Lei(Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material,Hunan University of Science and Technology,Xiangtan 411201;School of Mechanical Engineering,Yancheng Institute of Technology,Yancheng 224051)

机构地区：[1]湖南科技大学机电工程学院难加工材料高效精密加工湖南省重点实验室,湘潭411201 [2]盐城工学院机械工程学院,盐城224051

出　　处：《宇航材料工艺》2024年第4期93-102,共10页Aerospace Materials & Technology

基　　金：国家自然科学基金(52175400;51805164);湖南省自然科学基金(2021JJ30263);江苏省自然科学基金(BK20201474);湖南省教育厅资助科研项目(18A182)。

摘　　要：在实际加工过程中,碳纤维增强复合材料(Carbon Fiber-Reinforced Plastic,CFRP)的制孔通常采用多工序工艺以优化制孔质量。然而,关于多工序加工中切削表面形成机制的详细解析尚存不足。针对此问题,本文构建了四种典型纤维取向(θ=0°、45°、90°、135°)下的二次切削仿真模型,深入探讨了二次切削过程中切削表面的形成机制及切削损伤的演变模式。研究结果显示,随着主轴转速n的增加,二次切削合力呈现显著的下降趋势;而进给速度Vf的提高则导致二次切削合力显著上升。进一步分析发现,当纤维取向为θ=0°时,首次切削的切削表面损伤对第二次切削的影响相对较小;而当纤维取向为θ=45°、90°或135°时,在第二次切削厚度小于首次切削纤维损伤层深度的条件下,第二次切削能够有效去除首次切削产生的损伤层,且不产生新的纤维损伤,从而显著提升切削表面的质量。In the actual processing procedure,multi-step processing was commonly used to optimize the holemaking quality of carbon fiber-reinforced plastic(CFRP).However,there was still a lack of detailed analysis on the formation mechanism of the cutting surface in multi-step processing.To address this issue,this paper constructed a secondary cutting simulation model for four typical fiber orientations(θ=0°,45°,90°,135°),and explored the formation mechanism of the cutting surface and the evolution pattern of cutting damage during the secondary cutting process.The results show that with the increase of the spindle speed n,the secondary cutting force exhibits a significant downward trend;while an increase in the feed rate Vf leads to a significant rise in the secondary cutting force.Further analysis reveals that when the fiber orientationθis 0°,the influence of the cutting surface damage from the first cutting on the second cutting is relatively small.However,when the fiber orientationθis 45°,90°or 135°,under the condition that the second cutting thickness is less than the depth of the fiber damage layer caused by the first cutting,the second cutting can effectively remove the damage layer generated by the first cutting without causing new fiber damage,thus significantly improving the quality of the cutting surface.

关 键 词：碳纤维增强复合材料(CFRP) 多工序 损伤演变 切削力 有限元仿真 

分 类 号：TQ327[化学工程—合成树脂塑料工业]