微小型电火花加工机伺服系统驱动性能研究

组建了微小型电火花加工机及放电检测和装置性能测试环节。根据电火花放电加工过程工艺要求，对微小型电火花加工机的放电加工过程及其微步距伺服控制系统进行了实测和特性实验。试验结果表明，该系统满足微小型电火花加工机实际微细加工的需要。     

电火花放电加工间隙状态检测方法综述

间隙状态检测是电火花加工过程中极其重要的一个环节。该文介绍了利用独立式脉冲电源进行电火花加工过程间隙状态检测的常用方法，分析了它们的实现原理与特点。     

基于信噪比的微小孔加工工艺参数的分析方法

加工工艺参数准确合理的分析方法是优化组合电火花微细加工中多目标工艺参数的重要前提和保证。文章利用参数设计中的信噪比方法对电火花微小孔加工过程中的工艺参数进行分析研究，得到电火花微小孔加工过程中关键参数单因子工艺指标的优化分析结果，从而达到对电火花微小孔加工工艺参数进行单因子优化设计的目的，为多目标工艺参数综合优化组合提供重要的数据支持。试验结果表明信噪比分析方法能够较好地解决电火花微细加工中的关键工艺参数优化问题，对加工效率和加工精度有一定的改善和提高。     

电火花加工时的射频辐射初探

前言电火花有射频辐射是早被发现了的。而电火花加工会干扰无线电和电视的接收又是众所周知的。但是,研究电火花加工过程中的射频辐射特征以及用以监测加工过程的尝试则是近年才开始的事。     

模糊神经网络在电火花加工机中的应用

从提高系统的加工效率和加工质量角度出发，首先分析了电火花加工过程的特点。并以此分析为基础，提出了在电火花加工过程中，使用模糊神经网络控制技术。利用模糊控制器的特点，结合人工神经元网络的优点，切实校正了某些不完善规则的不利影响，可靠地提高了控制系统的快速响应能力。     

电解和电火花联合加工时蚀除金属

前言电解和电火花联合加工乃是两种加工过程同时从被加工表面蚀除金属:电解加工过程和电火花加工过程。这种轮流执行电解和电火花加工的装置叫电解一电火花加工机床。这种机床装配有共同的机座、储存煤油和盐溶液共同的容器和为电解与电火花加工的两种电源。粗加工用电解方法,精加工用电火花方法。     

电火花加工过程模糊控制系统的参数选取与算法设计

设计了一种新的电火花加工过程模糊控制方法，实现了加工过程中多种参数的在线综合调节，着重分析了控制系统的输入和输出参数的选取，给出了完整的模糊控制算法。     

电火花加工过程高速摄影研究综述

由于电火花加工过程的时间极短,高速摄影技术是研究电火花加工过程最有效和最直接的实验方法。首先对传统观测方法在电火花加工过程中的等离子体观测、气泡观测和蚀除屑观测研究成果进行了简述;随后介绍了采用带通滤光镜来避免等离子体亮光干扰并实现电极轮廓形状观测的方法及其研究成果;最后阐述了目前可实现放电点处微观细节观测的最新方法及其研究成果,并对电火花加工过程的高速观测方法进行了总结与展望。     

高速走丝线切割机的断丝原因及对策

断丝是线切割加工中的常见问题，造成断丝的原因也很多。针对高速走丝电火花线切割加工过程中的断丝问题，综述并补充分析了影响电火花切割中断丝的相关因素，并提出了切实有效的减少断丝现象的对策。     

电火花铣削中电极损耗及补偿的几何描述方法

提出了电火花铣削加工的基于数学模型的电极分解加工补偿法，即通过将电火花铣削加工过程划分为两个阶段——型腔侧面轮廓加工和底面的加工，这样就简化了放电状态的检测和电极补偿运动。在分别对侧面和底面加工过程分析的基础上，建立了侧面轮廓和底面加工的电极损耗和补偿的数学模型，为电极自动在线补偿提供了理论基础。     

Machining performance on hybrid process of abrasive jet machining and electrical discharge machining

To develop a hybrid process of abrasive jet machining (AJM) and electrical discharge machining (EDM),the effects of the hybrid process parameters on machining performance were comprehensively investigated to confirm the benefits of this hybrid process.The appropriate abrasives delivered by high speed gas media were incorporated with an EDM in gas system to construct the hybrid process of AJM and EDM,and then the high speed abrasives could impinge on the machined surface to remove the recast layer caused by EDM process to increase the efficiency of material removal and reduce the surface roughness.In this study,the benefits of the hybrid process were determined as the machining performance of hybrid process was compared with that of the EDM in gas system.The main process parameters were varied to explore their effects on material removal rate,surface roughness and surface integrities.The experimental results show that the hybrid process of AJM and EDM can enhance the machining efficiency and improve the surface quality.Consequently,the developed hybrid process can fit the requirements of modern manufacturing applications.     

Investigation of wire electrical discharge machining of thin cross-sections and compliant mechanisms

The wire electrical discharge machining (EDM) of cross-section with minimum thickness and compliant mechanisms is studied. Effects of EDM process parameters, particularly the spark cycle time and spark on-time on thin cross-section cutting of Nd–Fe–B magnetic material, carbon bipolar plate, and titanium are investigated. An envelope of feasible wire EDM process parameters is generated for the commercially pure titanium. The application of such envelope to select suitable EDM process parameters for micro feature generation is demonstrated. Scanning electron microscopy (SEM) analysis of EDM surface, subsurface, and debris are presented. SEM observations lead to a hypothesis based on the thermal and electrostatic stress induced fracture to explain the limiting factor for wire EDM cutting of thin-sections. Applications of the thin cross-section EDM cutting for manufacture of compliant mechanisms are discussed.     

Machining characteristics of magnetic force-assisted EDM

The gap conditions of electrical discharge machining (EDM) would significantly affect the stability of machining progress. Thus, the machining performance would be improved by expelling debris from the machining gap fast and easily. In this investigation, magnetic force was added to a conventional EDM machine to form a novel process of magnetic force-assisted EDM. The beneficial effects of this process were evaluated. The main machining parameters such as peak current and pulse duration were chosen to determine the effects on the machining characteristics in terms of material removal rate (MRR), electrode wear rate (EWR), and surface roughness. The surface integrity was also explored by a scanning electron microscope (SEM) to evaluate the effects of the magnetic force-assisted EDM. As the experimental results suggested that the magnetic force-assisted EDM facilitated the process stability. Moreover, a pertinent EDM process with high efficiency and high quality of machined surface could be accomplished to satisfy modern industrial applications.     

A plate capacitor model of the EDM process based on the field emission theory

The electrical discharge machining (EDM) process is, by far, the most popular amongst the non-conventional machining processes. The technology is optimum for accurate machining of complicated shapes in hard materials, required in the modern industry. However, although a lot of EDM machines are widely applied for many years, fundamental knowledge of the process is still limited. The complex nature of the process involves simultaneous interaction of thermal, plasma temperature and electromagnetism factors, which makes the machining process modeling very difficult. In this paper, based on the analysis of the electric discharge machining (EDM) process, a plate capacitor model is constructed to describe the discharging process in a pulse time. The whole EDM process is divided into four stages, successively as interelectrode electric-field establishment, electric discharge channel formation, stable EDM and deionization, the interaction of each stage and the distribution function of EDM energy are deduced using the field electron emission theory. For the purpose of analyzing the effect of the single factor, a set of machining through-hole experiments were carried out and investigated. The study shows that critical electric-field intensity and the effective discharging time rate play major roles on the improvement of machining efficiency; the model can explain the differences of machining efficiency using different materials of tool pole and different EDM parameters; and the theoretical results are concordant with the experimental data well.     

电火花加工脉冲电源人机接口界面设计

利用 12 8× 2 4 0规格点阵式LCD模块设计了电火花加工脉冲电源人机接口界面 ,在汉字提示下能够完成加工尺寸、加工工艺参数设定、加工过程跟踪及设备状态监控等功能 ,使界面变得更为友好 ,大大地提高了脉冲电源的性能。     

State of the art electrical discharge machining (EDM)

Electrical discharge machining (EDM) is a well-established machining option for manufacturing geometrically complex or hard material parts that are extremely difficult-to-machine by conventional machining processes. The non-contact machining technique has been continuously evolving from a mere tool and die making process to a micro-scale application machining alternative attracting a significant amount of research interests.In recent years, EDM researchers have explored a number of ways to improve the sparking efficiency including some unique experimental concepts that depart from the EDM traditional sparking phenomenon. Despite a range of different approaches, this new research shares the same objectives of achieving more efficient metal removal coupled with a reduction in tool wear and improved surface quality.This paper reviews the research work carried out from the inception to the development of die-sinking EDM within the past decade. It reports on the EDM research relating to improving performance measures, optimising the process variables, monitoring and control the sparking process, simplifying the electrode design and manufacture. A range of EDM applications are highlighted together with the development of hybrid machining processes. The final part of the paper discusses these developments and outlines the trends for future EDM research.     

轮胎活络模具花纹块电火花加工工艺的研究应用

结合使用L580T型轮胎放电加工机加工轮胎活络模具花纹块的生产实践,分析了电火花加工花纹块零件的工艺过程,着重分析了加工过程中粗加工、精加工、微加工阶段的峰值电流、脉冲宽度、脉冲间隔的变化规律,选择了合理的参数,总结出了应用电火花加工花纹块零件的工艺流程及工艺参数配置的方法,生产表明这种工艺满足花纹块加工精度要求。     

超声电火花复合加工在模具制造中的应用

电火花加工技术能对高硬度、高强度金属材料加工,但存在加工效率低和加工表面质量不好的缺陷。通过对超声电火花复合加工研究,探讨了放电参数对加工速度影响的规律,指出超声电火花复合加工工艺可弥补电火花加工在加工效率及质量方面的不足,将会对模具型腔、型芯的制造产生重要影响。     

提高电火花加工效率的工艺探讨

根据模具企业多年的电火花加工实践经验,就提高电火花加工效率进行了综合探讨。具体从电火花加工工艺、电火花加工机床的调整、电火花加工操作3个方面作了充分阐述,对提高电火花加工质量有重要指导作用。     

影响电火花成形加工工艺指标的因素分析研究

从模具制造电火花成形加工实际出发,简述了电火花加工放电过程的机理,全面分析了电火花成形加工中影响工艺指标的因素,提出了稳定放电加工,提高加工质量的相应措施以及获得最佳加工效果的途径。