CFRPs电火花加工热影响区抑制方法

赵一锦; 耿家宝; 杨晓冬

doi:10.7527/S1000-6893.2021.25660

航空学报 >

2022 , Vol. 43 >Issue 4: 525660 - 525660

DOI: https://doi.org/10.7527/S1000-6893.2021.25660

论文

CFRPs电火花加工热影响区抑制方法

赵一锦 ,
耿家宝 ,
杨晓冬

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哈尔滨工业大学机电工程学院, 哈尔滨 150001

收稿日期: 2021-04-12

修回日期: 2021-05-09

网络出版日期: 2021-06-29

基金资助

国家自然科学基金（51875133）；黑龙江省自然科学基金（LH2020E038）

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Inhibition method of heat affected zone in electrical discharge machining of CFRPs

ZHAO Yijin ,
GENG Jiabao ,
YANG Xiaodong

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School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China

Received date: 2021-04-12

Revised date: 2021-05-09

Online published: 2021-06-29

Supported by

National Natural Science Foundation of China (51875133); Natural Science Foundation of Heilongjiang Province (LH2020E038)

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摘要

电火花加工（EDM）碳纤维增强树脂基复合材料（CFRPs）的可行性已经得到了验证，但是电火花加工是热加工，电火花加工的工件表面存在热影响区，它是影响CFRPs电火花加工表面质量的重要因素。对晶体管脉冲电源条件下电火花加工CFRPs热影响区的抑制方法进行了研究，在单个脉冲放电能量相同的情况下，对不同放电能量施加方式下的热影响区进行了仿真与实验对比研究，结果表明在相同的放电能量下，较高的放电功率有利于减小热影响区，并可提高加工速度；相比于负极性加工，正极性加工热影响区较小。

关键词： 碳纤维增强复合材料; 电火花加工; 热影响区; 晶体管脉冲电源; 能量施加方式; 加工极性

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赵一锦 , 耿家宝 , 杨晓冬 . CFRPs电火花加工热影响区抑制方法[J]. 航空学报, 2022 , 43(4) : 525660 -525660 . DOI: 10.7527/S1000-6893.2021.25660

Abstract

The feasibility of Electrical Discharge Machining (EDM) for Carbon Fiber Reinforced Polymer resin matrix composites (CFRPs) has been verified. However, since EDM is a thermal process, there is a heat affected zone on the surface of EDMed workpieces, which deteriorates the surface quality of the machined CFRPs. In this paper, the inhibition methods of the heat affected zone of CFRPs machined by EDM using transistor pulse power supply are studied. In the case of the same discharge energy of a single pulse, heat affected zone under different energy applying modes were compared by simulation and experiment. The results indicate that under the same single discharge energy, higher discharge power is beneficial to reducing the heat affected zone and increasing the material removal rate. The results also show that the heat affected zone under positive polarity is smaller than that under negative polarity.

Key words： carbon fiber reinforced composite; electrical discharge machining; heat affected zone; transistor pulse power; energy application method; processing polarity

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