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The AgieCharmilles CUT 20 P, an EDM wire cut unit, is a very interesting machine offering outstanding features and excellent cutting performances. Caltrona€™s Wire EDM (Electrical Discharge Machining) process, or spark machining, uses a thin metal wire and de-ionized water to produce electrical sparks that cut through metal and other commonly-used production resources.
The wire EDM process is best used to cut small, intricate delineations, holes, and shapes in electrically conducive materials. Wire EDM is traditionally used to cut very hard metals such as titanium, steel and hastelloy, but Caltrona€™s CNC-controlled wire EDM machines can quickly and accurately cut all materials that conduct electricity, both hard and soft. Please contact the Calton professionals for project quotes or additional information on Wire EDM. We are a factory of Wire Cut EDM Machine,Sinker EDM Machine,Small Hole Drilling EDM Machine. CNC wire cut EDM machine puts impulse voltage between electrode wire and workpiece through impulse source, controlled by servo system, to get a certain gap, and realize impulse discharging in the working liquid between electrode wire and workpiece.
Electrode wire is connecting to cathode of impulse power source, and workpiece is connecting to anode of impulse power source. The gap between electrode wire and workpiece should be certainly maintained in a required range. The procedure should happen in the liquid with insulate capacity, for example saponification and deionized water, the liquid could act as medium of discharging channel and provide cooling and flushing. In Wire Electrical Discharge Machining (WEDMing), or Wire-Cut EDM, a thin single-strand metal wire is fed through the work piece, typically occurring while in a submerged tank of dielectric fluid or deionized water.

This process is used to cut plates and to make punches, tools, and dies from any conductive material, including hard metals that are too difficult to machine with other methods, such as; metal allows, graphite, carbide and diamond. Wire is threaded easily through work pieces with pockets on the top and bottom surface, improving threading success rate. Without technical know-how, the high precision machining achieved by experienced engineers can now be easily performed by anybody. In Wire EDMing of parts, the necessities of performing high precision machining on complex shapes with stepped height is increasing.
Taper Flex 45 is available as an option for further advanced high angle taper cutting up to 45 degrees. Numerous tiny holes appears due to erosion of impulse discharging, and therefore get the needed shape of workpiece( as show in figure 1-1). When workpiece is approaching electrode wire in the insulating liquid and gap between them getting small to a certain value, insulating liquid was broken through; very shortly, discharging channel forms, and electrical discharging happens.
Within this range, not only impulse power can break through insulating liquid to create spark discharging, but also the eroded workpiece can be flushed away after discharging process. As with short discharging time, the released heat won’t affect inside material of workpiece, and limits energy to a tiny field and keep characteristics of cool machining of wire cut EDM machine. The latest Wire EDM machines from Sodick feature not only high precision and highly responsive linear motors, but the automatic processing and surface finishing of complex shape workpieces without the need for adjusting machining conditions, leading to high speed and high precision machining. Even with workpieces with varying thicknesses, the machine can automatically adjust and even complex shapes can be machined without the need to process machining conditions.

And release huge high temperature instantaneously, up to more than 10000 degree centigrade, the eroded workpiece is cooling down swiftly in working liquid and flushed away.
If gap is too big, insulating liquid can’t be break through,, and there will be no spark discharging; if gap is too small, short circuit is easy to happen, no spark discharging neither. The guides move in the (X-Y) plane controlled by a CNC, the upper guide can also move independently in the (Z-U-V) axis, giving rise to the ability to cut tapered and transitioning shapes and can control axes movements. This new function ensures a higher success rate in threading wire through a hole on a submerged workpiece or a small diameter hole. The function consists of three parts, high angle guides, compensation jig and specialized software. This gives the Wire-Cut EDM the ability to be programmed to cut very intricate and delicate shapes. There is little change in the mechanical properties of a material in Wire EDMing due to its low residual stresses.

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