Wire Cut EDM (Electrical Discharge Machining) refers to a wire EDM machine that uses continuous moving fine metal wire（Molybdenum Wire or Brass Wire） as an electrode, The workpiece is mounted on a CNC wire cut EDM machine workbench, which is usually driven by X - and Y-axis motors（Servo motor or stepping motor）. CNC 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 system,CNC system a feed signal is continuously issued to continue the workpiece pulse spark discharge to remove the metal, cutting and forming. Wire Cutting EDM plays a crucial role in the mold and non-contact machining industries.
Molybdenum Wire cut EDM, also known as high-speed wire cutting machine,take wire (Molybdenum wire or Tungsten and Molybdenum alloy wire ) as electrode, Electrical discharging happened between the electrode and the work piece by using of the high frequency impulse power and the high peak current to bring high heat and high energy to erode the work piece. The precon ceived track of the wire is controlled by the moving of X-Y axis and U-Y axis which are driven by the machine. Then the work piece is processed.
Brass wire cutting EDM, also known as low-speed wire cutting machine, uses brass wire as the tool electrode and generally moves unidirectionally at a speed of less than 0.2mm/s. An insulating medium such as deionized water (close to distilled water)， Electrical discharging happened between the electrode and the work piece by using of the high frequency impulse power to erode the work piece. The accuracy can reach 1 μ m, and the surface quality can reach Ra0.1 μ m, which is also close to the grinding level, but it is not suitable for processing thick workpieces. The electrode wire is only used once and is no longer used after discharge, resulting in high usage costs.
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 middle wire cutting machine seamlessly integrates low-speed brass wire cutting technology with high-speed molybdenum wire cutting machine tools, incorporating high-precision multi-cutting techniques to achieve unprecedented machining capabilities，representing a newly developed process in recent years.the cutting speed, and machining accuracy of the middle wire cutting machine have been greatly improved. The accuracy can reach ±4 μ m, and the surface quality can reach Ra0.6 μ m, which is also close to the Brass wire cutting machine level. The electrode wire is reusable, resulting in low operating costs. It is the most cost-effective wire cutting machine model and is highly favored by users.
CNC Wire cutting EDM is commonly used in Precision mold-making industries, it delivers smooth surface finishes and high precision, especially on small, delicate workpieces，cold die, extrusion die, plastic mould, gear cutter hob, precision component. Wire cut EDM machines are ideal for creating high-tolerance parts with minimal distortion.
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