外界磁场改善电火花线切割加工性能研究

陈良; 许春香

doi:10.13433/j.cnki.1003-8728.2018.0317

外界磁场改善电火花线切割加工性能研究

doi: 10.13433/j.cnki.1003-8728.2018.0317

陈良,
许春香

1.
郑州工程技术学院机电与车辆工程学院, 郑州 450044

基金项目:

2016年度河南省科技攻关计划项目（162102210131）、中州大学科技创新团队建设计划项目（CXTD2017K4）及2017年郑州工程技术学院校级教育教学改革研究项目（ZGJG2017020B）资助

详细信息

作者简介:
陈良(1981-),讲师,硕士,研究方向为电气自动化,特种加工,zhongzhouchenliang@163.com

计量
- 文章访问数: 210
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- PDF下载量: 4
- 被引次数: 0
出版历程
- 收稿日期: 2016-12-18
- 刊出日期: 2018-03-05

Exploring Machining Processability in Magnetic Assisted Wire Electrical Discharge Machining

1.
College of Electromechanical and Vehicle Engineering, Zhengzhou Institute of Technology, Zhengzhou 450044, China

摘要

摘要: 本文旨在进一步提高电火花线切割的材料去除率、表面精度和形位精度，提出外界磁场辅助方法来改善电火花线切割加工的加工性能，并对该方法进行理论和实验分析。首先，理论分析了外界磁场辅助下放电通道内的单个粒子运动轨迹，运动轨迹方程表明，外界磁场能够有效地促进蚀除残渣的排出。其次，采用不同吸力的磁力表座作为磁场源，通过COMSOL仿真软件数值计算得到加工区域的磁感应强度分布；最后，从实验角度出发，分别分析了外界辅助磁场对于不同加工参数情况下的加工速度、表面粗糙度和切缝宽度的影响规律。实验结果表明，增加辅助磁场能够有效提高电火花线切割的加工性能；此外，磁感应强度与加工参数存在最佳组合关系。本次研究提出的磁场辅助加工方法和加工规律可以为实际加工提供重要的指导价值。
- 电火花线切割 /
- 外界磁场 /
- 材料去除率 /
- 表面精度 /
- 形位精度
Abstract: This paper aims to further improve the machining processability of wire electrical discharge machining (WEDM), and a magnetic-assisted method is proposed to improve its processing performance. Firstly, the trajectory of charged particles in discharge channel under external magnetic field is theoretically analyzed, and the movement path equation of the charged particles shows that the external magnetic field can significantly enhance charged particles to be expelled. Secondly, the magnetic pedestals of varied intensities are used as magnetic field source, and the strength of magnetic field distribution in a machining region is calculated by COMSOL simulation software. Then, the influence law of external magnetic field on the processability of different parameters is obtained with experiments. The experimental results indicate that the external magnetic field can effectively improve the processability of WEDM. Besides, there is an optimal relationship between magnetic field intensity and machining parameters. The influence law of the magnetic assisted method can provide significant reference value for practical machining process.
- wire electrical discharge machining (WEDM) /
- external magnetic field /
- surface accuracy /
- geometric accuracy /

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参考文献(15)

[1]	朱宁,叶军,韩福柱,等.电火花线切割加工技术及其发展动向[J].电加工与模具,2010,(S1):53-59,63 Zhu N, Ye J, Han F Z, et al. Development trends of WEDM technology[J]. Electromachining & Mould, 2010,(S1):53-59,63(in Chinese)
[2]	陈志,李贺,张臻,等.基于灰色预测模型电火花线切割工艺参数优化[J].机床与液压,2014,42(23):5-8 Chen Z, Li H, Zhang Z, et al. Process parameters optimization in WEDM based on GFM[J]. Machine Tool & Hydraulics, 2014,42(23):5-8(in Chinese)
[3]	殷静凯,李文斌.电火花线切割加工Cr12MoV的参数优化[J].机械设计与制造,2016,(2):248-250,254 Yin J K, Li W B. Optimization of WEDM parameters of processing Cr12MoV[J]. Machinery Design & Manufacture, 2016,(2):248-250,254(in Chinese)
[4]	程新江,陈玉全,王彤,等.快走丝电火花线切割加工质量的改善[J].制造技术与机床,2003,(11):63-64 Cheng X J, Chen Y Q, Wang T, et al. Improvement of the machining quality by high-speed WEDM[J]. Manufacturing Technology & Machine Tool, 2003,(11):63-64(in Chinese)
[5]	Mahapatra S S, Patnaik A. Optimization of wire electrical discharge machining (WEDM) process parameters using Taguchi method[J]. The International Journal of Advanced Manufacturing Technology, 2007,34(9-10):911-925
[6]	Mahapatra S S, Patnaik A. Optimization of wire electrical discharge machining (WEDM) process parameters using Taguchi method[J]. The International Journal of Advanced Manufacturing Technology, 2007,34(9-10):911-925
[7]	Muthu K V, Suresh B A, Venkatasamy R, et al. Optimization of the WEDM parameters on machining incoloy800 super alloy with multiple quality characteristics[J]. International Journal of Engineering Science and Technology, 2010,2(6):1538-1547
[8]	Zhang Z, Huang H, Ming W Y, et al. Study on machining characteristics of WEDM with ultrasonic vibration and magnetic field assisted techniques[J]. Journal of Materials Processing Technology, 2016,234:342-352
[9]	丁青旺,裴万生,詹士成,等.超声波辅助振动工作液对微细电火花钻孔效率的影响[C]//第15届全国特种加工学术会议论文集.南京:中国机械工程学会, 2013 Ding Q W, Pei W S, Zhan S C, et al. The effect of ultrasonic vibration mixing dielectric on the drilling efficiency of micro-WEDM[C]//Nanjing:National Academic Conference of Non-Traditional Machining. Nanjing:China Mechanical Engineering Society, 2013(in Chinese)
[10]	Guo Z N, Lee T C, Yue T M, et al. Study on the machining mechanism of WEDM with ultrasonic vibration of the wire[J]. Journal of Materials Processing Technology, 1997,69(1-3):212-221
[11]	Hoang K T, Yang S H. A study on the effect of different vibration-assisted methods in micro-WEDM[J]. Journal of Materials Processing Technology, 2013,213(9):1616-1622
[12]	胡建华,汪炜.超声振动辅助电火花微小孔加工中超声参数对加工效率的影响[J].中国机械工程,2010,21(6):694-697 Hu J H, Wang W. Effects of ultrasonic parameters on work efficiency in ultrasonic vibration assisted EDM of micro-hole[J]. China Mechanical Engineering, 2010,21(6):694-697(in Chinese)
[13]	刘宇,阎长罡,张生芳,等.外加磁场对铁磁材料电火花小孔加工的影响[J].电加工与模具,2014,(1):13-16 Liu Y, Yan C Z, Zhang S F, et al. Influence of the additional magnetic field on small-hole EDM of ferromagnetic material[J]. Electromachining & Mould, 2014,(1):13-16(in Chinese)
[14]	庞昊聪,刘志东,杨超,等.高效电火花线切割磁场对表面烧伤影响研究[J].电加工与模具,2016,(3):11-15 Pang H C, Liu Z D, Yang C, et al. Effect of magnetic field on surface burning in high-efficiency HSWEDM[J]. Electromachining & Mould, 2016,(3):11-15(in Chinese)
[15]	Heinz K, Kapoor S G, Devor R E, et al. An investigation of magnetic-field-assisted material removal in micro-EDM for nonmagnetic materials[J]. Journal of Manufacturing Science and Engineering, 2011,133(2):021002