CFRP气雾中电火花加工实验研究

doi:10.7527/S1000-6893.2024.30886

Abstract

Abstract:

Carbon Fiber Reinforced Polymer （CFRP） is widely used as an advanced composite material. Traditional cutting methods for processing CFRP are prone to forming machining defects such as delamination， burrs， and cracks， and have the problem of severe tool wear. Laser processing and water jet processing of CFRP are prone to defects such as the heat affected zones， impact damage， and stepped delamination. As a non-contact machining method， Electrical Discharge Machining （EDM） can machine any conductive material regardless of the strength， hardness， and stiffness of the workpiece material. Therefore， EDM has a great potential in solving the difficult machining problem of large CFRP components. However， the EDM of CFRP faces challenges such as the contamination of the CFRP components by the liquid medium and the limited size of the CFRP components. Therefore， this study proposes to perform the CFRP EDM in an aerosol medium， and builds an EDM milling machine tool based on a six-degree-of-freedom serial robot. The experiments on planar and spatial EDM milling of the CFRP components were conducted and the action mechanism of the droplet in EDM of CFRP material in aerosol medium was revealed， verifying the feasibility of the EDM milling of CFRP in aerosol medium. This study has a great significance for the low-cost， green， and efficient process of large and complex CFRP thin-walled structural components.

Key words: Carbon Fiber Reinforced Polymer (CFRP), aerosol medium, Electrical Discharge Machining (EDM), droplet action, edge damage aera

CLC Number:

Jiaxuan HAN, Fan CHEN, Xuguang YANG, Zhenyu WANG, Xiaoming YUE. Experimental study on EDM of CFRP in aerosol medium[J]. Acta Aeronautica et Astronautica Sinica, 2025, 46(4): 430886.

Figures/Tables 17

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加工参数	数值
极性	工件负极性
击穿电压/V	1 500
气压/MPa	0.5
脉冲频率/kHz	5
占空比/%	20
加工电流/A	3，5，9

工具管电极扫描线速度/（mm·s^-1）	循环周期/s	加工层数
0.39	127	19
0.96	52	46
1.85	27	88
2.63	19	126

加工参数	数值
极性	工件负极性
击穿电压/V	1 500
气压/MPa	0.5
脉冲频率/kHz	15
占空比/%	20
加工电流/A	9

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Experimental study on EDM of CFRP in aerosol medium

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