What is the EDM machine meaning in the metal working industry

Electrical spark erosion, also known as electrical discharge machining and electrical corrosion machining, called electrical discharge machining in Japan and electrical corrosion machining in the former Soviet Union. It is a method of processing the metal workpiece by utilizing the phenomenon of electric corrosion generated during the pulse discharge between the two poles (electrode and workpiece, should be conductive). Academically it belongs to the category of electrophysical processing. EDM technology is one of the most important parts of special machining technology.

What is the advantage of electrical discharging machining against traditional metal working method?

Answer: With the development of industrial production and the advancement of science and technology, more and more new materials with a high melting point, high hardness, high strength, high brittleness, high viscosity, high toughness, high purity and other properties continue to appear, and also some with various complex structures that can’t be machined by traditional metal working method, sometimes difficult or impossible to process with traditional metal working technology. Therefore, in addition to further development and improvement of traditional mechanical metal working methods, wire EDM machine suppliers also strive to find new processing methods. The electrical discharging machining (EDM) method can meet the needs of development, and shows many excellent performances in the application, so it has been rapidly developed and increasingly widely used.

What's EDM die sinking machining (EDM forming machining)?

The EDM die sinker machine is able to cope machining by prepared electrodes, the cavity that created is the same as the profile of the electrode. EDM machine can process punches, drawing dies, and extension dies of various types of holes; process various forging dies, extrusion dies, plastic injection molds and extrusion dies; and also process various small holes, deep holes, heterosexual holes, and curved holes, and special materials with complex-shaped parts, etc.

Characteristics of EDM die sinking machining

(1). During machining, the tool electrode and the workpiece material are not actually touching and there is basically no macro-mechanical force between the two. Therefore, the "soft" tool electrode can be used to process the "hard" workpiece. For example, graphite and copper electrodes can process hardened steel, cemented carbide, and even diamond. (2). Because the spark energy density of the high-frequency power discharging can be accurately controlled, and there is no macro mechanical force between the two poles (electrode and workpiece), so the precise and fine machining can be achieved. Such as the processing of narrow slits, narrow grooves, micro-small holes of molds and parts, the processing accuracy can reach micron level, even sub-micron level. (3) "Copying". With direct use of electrical power for processing, it is easy to realize the automation, intelligence, and application of modern computer control technology to precisely control the machining process, which makes the machining of workpieces more realistic. (4) Direct use of electrical energy for processing, which is convenient for automation of the machining process, and can reduce mechanical processing procedures, shorten processing steps, low labor intensity, and easy to use and maintain

Uses of EDM machining technology

(1) Processing various technologies and their alloy materials, conductive super-hard materials (such as polycrystalline diamond, cubic boron nitride, cermets, etc.), special heat-sensitive materials, semiconductor, and non-semiconductor materials. (2) Processing various kinds of complex-shaped hole and cavity workpieces by EDM hole drilling machine for sale , including processing round hole, square hole, polygon hole, special-shaped hole, curved hole, threaded hole, micro hole, deep hole and other type hole workpieces, as well as various types Face cavity workpiece. For example, processing exceptionally large molds and parts ranging from a few micrometers of holes and grooves to several meters. (3) Cutting of various workpieces and materials, including cutting of materials, cutting of parts with special structure, cutting of fine narrow slits and parts composed of fine narrow slits (such as metal grid, slow wave structure, heterogeneous orifice spinneret, laser Pieces, etc.) with EDM wire cutting machine for sale . (4) Processing all kinds of forming parts such as forming knives, samples, tools, measuring tools, threads and so on. (5) Grinding of workpieces, including small holes, deep holes, inner circles, outer circles, flat surfaces, etc. and profile grinding. (6) Engrave and print nameplates and marks. (7) Surface strengthening and modification, such as high-speed quenching of metal surfaces, nitriding, carburizing, coating of special materials and alloying, etc. (8) Auxiliary uses, such as removing taps and drill bits from parts in this segment, repairing worn parts, etc.

CNC EDM Wire Cut Machine For Sale

Among all wire EDM companies, we are the one who can not only offer high-quality CNC wire EDM machine but outstanding service all the time. With a reasonable wire cut CNC machine price, we make sure to provide you with wire EDM machines of high precision.

What is CNC EDM Wire Cut Machine？

CNC EDM Wire Cut Machine refers to a wire EDM machine that uses continuous moving fine metal wire as an electrode, on the workpiece pulse spark discharge to remove the metal, cutting and forming. Early CNC wire EDM machines used electric model-tracking to control the cutting path. Due to the low cutting speed, wire cut electric discharge machining is only used in the electronic industry processing at that time. With the continuous development of pulse power supply and digital control technology as well as the application of multiple wire electrical discharge machining technology, the cutting speed, and machining accuracy of the desktop EDM wire cutting machine for sale in DMNC have been greatly improved. And DMNC has various types of cnc wire cutting machine for sale. If you take interest, please feel free to contact us to learn more about cnc wire cutting machine price

CNC Wire Cut Machine Process

The workpiece is mounted on a CNC wire cut EDM machine workbench, which is usually driven by X - and Y-axis motors. The wire EDM machine control system outputs the corresponding information according to the pre-input working program so that the workbench moves accordingly, and the workpiece is close to the electrode wire. When the two close to the appropriate distance will produce spark discharge and corrosion of metal. After the metal is removed, the distance between the workpiece and the electrode wire is increased. According to the size of this distance and the pre-input program of the CNC wire cut machine, the control system constantly sends out the feed signal, so that the CNC wire cut machine process continues.

Differences Between Wire Cut EDM And Sinker EDM

EDM standards for electric discharging machining, which is a kind of special machining technique, electrode and workpiece(conductive material) connect to positive and negative anodes of high frequency power respectively, with control of CNC system, when electrode approaches workpiece to a tiny distance, the gap between electrode and workpiece is broke through, spark with high temperature appears, and erode the workpiece. As there is no physical touching between electrode and workpiece, and temperature is so high, these advantages make EDM machining an ideal solution for machining complex shapes and super hard materials like hard alloy, titanium alloy. There are two typical applications of EDM technology wire cut EDM and die sinking EDM.

Die sinking EDM is like a kind copy machining, it’s just like stamping on the workpiece, the complete machining requires an electrode, dielectric fluid and HF power. the shape of electrode is produced according to the products, for instance, it could be eyeglasses frame shape, keyboard shape, mobile phone shell shape，pen shape, coin shape, souvenir medal shape, bottle cap shape and so on. Along with forward movement of electrode, spark appears and erode the workpiece(conductive material), a cavity of same shape electrode is created on the workpiece. Die sinking machining is a kind of high precision machining, DMNC’s CNC EDM machines can make mirror surface finish with high accuracy. With advanced control system, DMNC’s CNC EDM can realize 5-axis simultaneous control for turbine machining.

Wire cut EDM also requires electrode, dielectric fluid and HF power. The difference is electrode, wire EDM uses metal wire with small diameter, mainly brass wire or molybdenum wire for different types of wire EDM. The wire goes towards workpiece according to programmed path, when wire approaches workpiece to a tiny distance, breakthrough happens, spark with high temperature appears, when erodes the workpiece, and workpiece is split separately.

In short, wire EDM is more like cutting off and die sinking EDM is more like digging a hole/cavity with certain shape.

According to different characteristics of wire EDM and sinker EDM, wire EDM is mainly used for metal punching die, male and female die, cut off parts; EDM die sinker machine is mainly used for plastic injection molds, small ribs, extrusion di, die-casting mold and etc.