08-08-2012, 01:41 PM
WIRE EDM
03 Anupam PRESENTATION ON WIRE EDM.pptx (Size: 853.12 KB / Downloads: 405)
Electrical discharge machining
Electric discharge machining (EDM), sometimes colloquially also referred to as spark machining, spark eroding, burning, die sinking or wire erosion, is a manufacturing process whereby a desired shape is obtained using electrical discharges (sparks).
Material is removed from the workpiece by a series of rapidly recurring current discharges between two electrodes, separated by a dielectric liquid and subject to an electric voltage. One of the electrodes is called the tool-electrode, or simply the ‘tool’ or ‘electrode’, while the other is called the workpiece-electrode, or ‘workpiece’.
WIRE EDM
Wire EDM (Vertical EDM's kid brother), is not the new kid on the block. It was introduced in the late 1960s', and has revolutionized the tool and die, mold, and metalworking industries. It is probably the most exciting and diversified machine tool developed for this industry in the last fifty years, and has numerous advantages to offer.
It can machine anything that is electrically conductive regardless of the hardness, from relatively common materials such as tool steel, aluminum, copper, and graphite, to exotic space-age alloys including hastaloy, waspaloy, inconel, titanium, carbide, polycrystalline diamond compacts and conductive ceramics.
MACHINE
Wire EDM’s are manufactured in various sizes and styles of flush or submerged type machines to fit the needs of the consumer. Large scale EDM’s can handle workpieces weighing over ten thousand pounds and can cut over twenty inches thick. Automatic Wire Threaders (AWT) are usually standard equipment on most models. In addition to the X-Y table travels, wire EDM’s have U / V travels for providing the movement to cut tapers. Most machines can cut tapers of 20-30 degrees depending on workpiece thickness.