电加工机床产品在激烈竞争中开拓发展

回顾了2003年我国电加工机床行业的总体情况，具体分析了电火花线切割机、电火花成形机、高速电火花小孔加工机及电加工专用设备的技术特点及市场状况，提出了我国电加工机床进一步发展的建议。     

2019年我国电加工机床行业经济运行情况分析

依据电加工机床行业重点生产企业的经济运行统计数据,介绍了2019年我国电加工机床行业的全年总体经营情况及分季度销售形势,分析了各类电加工机床的市场需求情况及市场变化趋势,并对行业的发展提出一些建议。     

我国电加工机床市场分析

1电加工机床行业概况我国电加工机床行业经过30多年的发展,在机床的数量、品种及产品性能等方面都有了较大的提高,已形成了一个具有一定规模的行业。目前,我国有50多个电加工机床生产企业,分布在江苏、浙江、北京、上海等近20个省、市,其中国营企业约占1／3,合资企业约占1／10,其他为集体或私营的中小型企业。电加工机床行业现有从业人员约1.3万人。我国生产的电加工机床主要以高速走丝电火花线切割机和非数控(包括单轴数控)的电火花成形机为主,占电加工机床总产量的90％以上,其中高速走丝电火花线切割机约占80％。我国的电加工机床与国外(…     

我国电加工行业在转型升级中砥砺前行

根据对我国电加工机床行业28家重点生产企业的统计,介绍了2016年电加工机床行业的基本经营状况,分析了电加工机床产品销售总体走向及市场特点,提出了未来电加工技术与装备的发展趋势。     

我国电加工机床行业现状及发展综述

介绍了我国电加工机床行业2013年的经营情况和近几年产品销售的总体走向,分析了电加工机床行业现状及产品结构调整所取得的成果,提出了我国电加工机床产品关键技术的发展建议。     

2010年我国电加工机床行业快速发展业绩优异

1电加工机床销售增长强劲我国电加工机床行业在经历了2008年金融危机重创到2009年下半年出现恢复性增长的历程后,2010年在宏观向好的经济形势拉动下,出现了强劲的增长势头。经对我国电加工机床行业25家骨干企业销售情况的统计,2010年共销售电加工机床     

加强技术创新,加快实现产品结构升级调整

2006年我国机床工具行业保持持续高速增长,电加工机床行业也呈现出良好的发展态势.为了比较全面地了解电加工机床行业的发展状况,特种加工机床分会秘书处对会员单位进行了2006年电加工机床产品的生产及营销情况调查,下面就对调查的情况进行一些分析.     

电加工机床加速往高端产品发展——2007年电加工机床行业营销状况分析

2007年我国电加工机床行业继续保持良好的发展态势.中国机床工具工业协会特种加工机床分会对我国2007年电加工机床的营销情况进行了调查统计,下面根据调查材料对主要电加工机床产品的营销状况和发展趋势进行分析.     

2020年我国电加工机床行业运行情况分析

基于我国电加工机床行业重点企业的统计数据,介绍了 2020年我国电加工机床行业的总体经营情况及"十三五"期间的市场走势.通过近四年的分季度销售情况对比,分析了 2020年的市场变化与特点,还就各类电加工机床的销售量和销售额占比解析市场需求,并对2021年的市场行情作了展望.     

电加工机床正从数量的增长转向性能质量的提升

由于我国经济的持续发展,特别是电加工机床的主要应用领域——模具制造业的快速发展以及航天航空、军工、IT、家电、建材等行业需求的不断增长,电加工机床的产量近年来已得到了很大的提升,从上世纪末各种电加工机床年产量1万台左右发展到目前的5万台左右,为我国模具制造业及相关行业的发展提供了有力的装备支撑。但是,2005年以来电加工机床产品生产、销售的各种迹象表明,电加工机床的发展正面临着由数量的迅速增长为主导转向为以性能质量的提升为主导。     

A numerical model of the EDM process considering the effect of multiple discharges

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 complex geometries in hard materials, as those required in the tooling industry. However, although a large number of EDM machines are sold every year, scientific knowledge of the process is still limited. The complex nature of the process involves simultaneous interaction of thermal, mechanical, chemical and electrical phenomena, which makes process modelling very difficult. In this paper a new contribution to the simulation and modelling of the EDM process is presented. Temperature fields within the workpiece generated by the superposition of multiple discharges, as it happens during an actual EDM operation, are numerically calculated using a finite difference schema. The characteristics of the discharge for a given operation, namely energy transferred onto the workpiece, diameter of the discharge channel and material removal efficiency can be estimated using inverse identification from the results of the numerical model. The model has been validated through industrial EDM tests, showing that it can efficiently predict material removal rate and surface roughness with errors below 6%.     

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.     

电火花加工能以更低的成本为微型加工提供优异的服务

JauchSchmider GmbH＆Co．KG（JS）是电火花技术的专家,专门生产电火花机旋转平台和主轴。该公司代表出席一个为时一天的研讨会,研讨会是关于挤压模具和冲模批量制造生产的微型加工技术的发展。公司代表的报告让与会者意识到：他们认为对铣削、微型车床、LIGA光刻、电铸和注塑及其它金属加工技术了如指掌,但对这种电火花技术却一无所知。电火花技术已经问世有50多年,并在不断地改进,提供了精密性能,而且比许多常规技术的成本要低。     

精密高效电加工关键技术取得重大突破——国家863计划、数控机床重大专项电加工课题实施成果综述

通过对近年来电加工领域实施国家高技术研究发展计划(863计划)和国家科技重大专项"高档数控机床与基础制造装备"情况的综述,较全面地介绍了近年来我国电加工领域突破的一些关键技术及取得的成果,阐述了这些项目实施所带来的重大作用和意义。     

A review on current research trends in electrical discharge machining (EDM)

Electrical discharge machining (EDM) is one of the earliest non-traditional machining processes. EDM process is based on thermoelectric energy between the work piece and an electrode. A pulse discharge occurs in a small gap between the work piece and the electrode and removes the unwanted material from the parent metal through melting and vaporising. The electrode and the work piece must have electrical conductivity in order to generate the spark. There are various types of products which can be produced using EDM such as dies and moulds. Parts of aerospace, automotive industry and surgical components can be finished by EDM. This paper reviews the research trends in EDM on ultrasonic vibration, dry EDM machining, EDM with powder additives, EDM in water and modeling technique in predicting EDM performances.     

浅谈压力铸造的全自动化生产

近年来,国家对制造业的数字化、网络化、智能化越来越重视,特别是《中国制造2025》的发布,更是促进整个制造业向智能制造迈进,铸造行业也应该紧跟步伐.在传统压力铸造行业中压铸机的加料、取件,切边机的上件、下件,加工机床的上件、下件,都是依靠人来完成,大大制约了行业的发展.本文阐述了压力铸造的全自动化生产,为压力铸造行业的...     

碳化硅反射镜安装面电火花平动加工工艺研究

针对大型Si C反射镜的加工需求,提出了一种电火花平动加工工艺。通过改造电火花线切割机床,搭建了加工实验平台,设计了采用内部高速高压冲液方式的电火花平动加工电极。在此基础上,以大型Si C反射镜为加工对象进行实验,验证了该工艺方法的可行性。     

Anomalous influence of polarity in sink EDM of titanium alloys

An anodic tool polarity is generally adopted in sink electrical discharge machining (EDM) to maximize material removal relative to tool wear. Sink EDM of Ti and Ti6Al4V is however atypical in that these materials necessitate a cathodic tool polarity. Adding to the intrigue is γ-TiAl, which machines better under the conventional anodic polarity. This research focused on clarifying the phenomena behind this interesting behavior by investigating removal mechanisms over a range of relevant process conditions. The anomaly is demonstrated to arise from the polarity-dependent nature and extent of TiC formation on the work surface, which significantly affects material removal.     

Manufacturing linear and circular contours using CNC EDM and frame type tools

In traditional electro discharge machining (EDM) the usual practice is to form a 3D female cavity in the work piece by making a corresponding male shaped tool and plunging this into the work piece. Recently, however, computer numerical control (CNC) EDM machines have become available which have the potential to generate a detailed shape without using complex electrodes. This paper describes a novel method of electro discharge machining which makes the generation of linear, circular and curved contours possible without any special electrodes. The experimental work employs CNC EDM, mild steel work pieces and inexpensive “frame type” copper tools. The results indicate, relative to the cavities produced, an improved effective material removal rate (MRR), a better surface finish and a lower powered machine. The paper also introduces the effect of EDM parameters on the process performance by modelling and analysing the experimental results using statistical techniques. Finally, a few applications are discussed.