Development of High Performance Wire Electrode for Wire Electric Discharge Machining
30 Jul 2001-Journal of the Japan Society of Electrical-machining Engineers (Japan Society of Electrical Machining Engineers)-Vol. 35, Iss: 79, pp 46-51
TL;DR: In this article, the authors discuss the effect of different types of transformations on the performance of a vehicle and show that the vehicle can adapt to the conditions of the environment and the environment.
Abstract: 1.は じめに エレクトロニクス化により, 情報通信分野の機器ば かりではなく, 家電品や 自動車等の高機能化も図ら れている, これを支えているのが, 半導体を構成す るICリードフレーム製造用の精密金型制作技術や 高集積電子部品の微細精密加工技術等の生産加 工技術である. これらの技術分野の一角を占める精 密加工技術として, ワイヤ放電加工技術がある。これ は、その原理から, 超硬金型, セラミックス等の硬質 材料の微細加工を可能にする技術であり, 今や工 業界では必要不可欠な存在となっている。長年に渡 って微細, 高精度, 高速加 上技術の追求が行われ るとともに合せて無人加工の推進などが進められて きた。最近では, 社会情勢に応じて, 自動車部品や 家電製品の部品に代表される部品加工にも本技術 が拡張利用されつつある, 本稿では, 現在汎川されている黄銅電極線から 最近の新しい被覆型電極線の開発状沙己まで, 金属 組織の制御の観点から述べてみたい。
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TL;DR: In this paper, the evolution of wire electrical discharge machining (WEDM) electrode technologies from using copper to brass wire electrodes and from brass wire electrode to the latest coated wire electrodes is discussed.
Abstract: Wire electrical discharge machining (WEDM) is an important technology, which demands high-speed cutting and high-precision machining to realize productivity and improved accuracy for manufacturing hard materials. WEDM has experienced explosive growth and complexity of equipment as well as rising demand for the basic process tool (the wire electrode). Greater taper angles, thicker workpieces, automatic wire threading, and long periods of unattended operation make the selection of the ideal wire a much more critical basis for achieving successful operation. This paper focuses on the evolution of EDM wire electrode technologies from using copper to the widely employed brass wire electrodes and from brass wire electrodes to the latest coated wire electrodes. Wire electrodes have been developed to help user demand and needs through maximum productivity and quantity by choosing the best wire. In the final part of the paper, the possible trends for future WEDM electrode research are discussed.
102 citations
Cites background from "Development of High Performance Wir..."
...Technologies with brass-coated wires are categorized as HIH (high hawk), HIF (high falcon), HIE (high eagle), HIR (high real), and HIS (high sonic) [27]....
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01 Jan 2012
TL;DR: In this paper, the influence of feed rate on the performance of wire electrical discharge machining on Titanium Ti-Al-4 V was investigated and the results on kerf width, material removal rate and surface roughness were graphically tabulated.
Abstract: Wire electrical discharge machining (WEDM) technology has been widely used in tool and die-making industry, automotive, medical and practically any conductive materials. It is a non-traditional machining process which used the continuously circulating wire as electrode and cuts the workpiece along a programmed path. The aim of this paper is to investigate the influence of feed rate on the performance of WEDM on Titanium Ti-Al-4 V. Brass wire was employed as the electrode in this study. The results on kerf width, material removal rate and surface roughness are graphically tabulated. The best combination of machining parameter viz. machine feed rate (4 mm/min), wire speed (8 m/min), wire tension (1.4 kg) and voltage (60 V) were identified. The selection of parameters depends on the requirements based on a better surface roughness or a maximum material removal rate. Hence an appropriate combination of variables can be selected accordingly. Furthermore, this combination can contributes to increase production rates perceptibly by reducing machining time.
54 citations
Cites background from "Development of High Performance Wir..."
...The most important properties to take into account are: (i) electric discharge performance; (ii) heat resistance; (iii) low calorification; and (iv) heat release [13]....
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20 Sep 2012
TL;DR: In a wire electrical discharge machining process, an electrically conductive workpiece is eroded ahead of a continuous moving wire by spark discharges, which are identical with those in conventional...
Abstract: In a wire electrical-discharge machining process an electrically conductive workpiece is eroded ahead of a continuous moving wire by spark discharges, which are identical with those in conventional...
42 citations
Cites background from "Development of High Performance Wir..."
...Its use was limited owing to its low mechanical strength and inability to control vibrations resulting in a slow machining speed, inferior machining accuracy and propensity of wire breakage.(21,32) Today its use is confined to earlier machines with a power supply designed for...
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...initiates cooling of the wire electrode core and yields a good cutting performance.(21) The imperative mechanical properties of the wire electrode are its tensile strength (sY), elongation and straightness....
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TL;DR: In this paper, the effect of six input parameters (Ton, Toff, Ip, SV, WF and WT) on wire breakage frequency and the surface integrity of wear out wire during machining of pure titanium was analyzed.
Abstract: Wire electrical discharge machining (WEDM) is a non-traditional machining technique that is able to produce complicated and 3-D shapes through difficult machine metals without using high cost grinding or expensive formed tools. Wire electrical discharge machine should satisfy performance demands such as: high-speed cutting, resistant against wire rupture and accurate machining to improve the productivity and to achieve high quality in machining work pieces. Many factors have effect on the process of WEDM (cutting speed and work piece precision) including electrical parameters and electrode. But wire breakage frequency in the WEDM process decreases the productivity and quality of machined surface. This paper describes the effect of six input parameters i.e. Ton, Toff, Ip, SV, WF and WT on wire breakage frequency and the surface integrity of wear out wire during machining of pure titanium. An optimum range of input parameters has been selected for carrying out further research to develop the empirical models for WEDM of pure titanium.
25 citations
Cites background from "Development of High Performance Wir..."
...So, the wire electrode is one of the important factors contributing the overall WEDM performance [1]....
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01 Jan 2017
TL;DR: In this paper, the white layer thickness of wire electrical discharge machining (WEDM) was investigated and it was shown that the WLT increases linearly by 3 and 2 µm for every 20 µJ increase in the spark energy while using brass and coated wire, respectively.
Abstract: One of the major requirements of wire electrical discharge machining (WEDM) is to develop suitable technology for producing smooth surfaces. The main characteristic of WEDM is the development of the white layer. To ensure good surface quality, the white layer thickness (WLT) must be as thin as possible, homogeneous, and crack-free. Spark energy and wire electrode type are the most important parameters to experimentally investigate WLT. Experimental results show that the WLT increases linearly by 3 and 2 µm for every 20-µJ increase in the spark energy while using brass and coated wire, respectively.
16 citations