Presentation wire cut EDM OF WATER-JET OF ELECTRODE.ppt

ECM was developed in 1929 Not as widely used as other processes Generally used to make complex cavities and shapes Finishes parts burr-free and bright surfaces Never has any thermal damage to part or wear on the tools Parts From Electrochemical Mill Replacement Knees Design Considerations for ECM ECM is not suitable for producing sharp edges or flat sufaces Flow of electrolyte can become difficult Designs should make provision for a small taper for holes to be machined Electrochemical Grinding (ECG) Process that combines electrochemical machining with conventional grinding Grinder wheel is embeded with abrasive particles of dimond or aluminum oxide Abrassives on the spindle have two functions To act as insulators between the wheel and workpiece To remove electrolytic products from the work area Majority of material is removed by the electrolytic action, less than 5% is removed by the wheel The ECG process is similar to that of milling, and grinding Much better than traditional grinding where wheel wear is high Electrical discharge machining Erosion of metals by spark discharge Capacitor discharge is between 50 and 380 V EDM can be used on any material that is an electrical conductor Uses an electrode that sends out the sparks which erodes the metal Uses dielectric fluids for cooling and flushing of the material EDM wire Wire is brass, copper or tungsten With wire edm you can basically cut out any design * Group 411/16/05 David Reis Jeremy Huckins Alberto Barraza Nick Mellady The Process of grinding Grinding – a chip removal process that uses an individual abrasive grain as the cutting tool. Work pieces Cylindrical, conical, fillets, helical, concave, slotting, internal grinding Naturally Occurring Abrasives Emery, corundum, quartz, garnet, diamond Grinding Wheels Structure, wear, and fracture patterns Grinding Wheels The surface of grinding wheels are made up of these grains. Grains have random irregular shapes that are located at the edge of the grindi