Brush Erosion-Dissolution Mechanical Machining

By Andrew Winston S. TanBrush Erosion-Dissolution Mechanical MachiningWhat is BEDMM?Machining by ECD, EDE and friction interaction, in a water-glass solutionECD Electrochemical dissolutionEDE Electrodischarge erosionWater-glass solution sodium silicate plus waterBEDMM is based on machining by ECD, EDE and friction interaction between metal workpieces, in a water-glass solution.2

ECM Electrochemical machiningEDM Electrodischarge machiningMA Mechanical abrasionECM It involves removal of material from a workpiece using electrolysis. This is achieved by connecting the workpiece and the electrode to an electrical power supply.EDM Also known as spark erosion, employs electrical energy to remove metal from the workpiece without touching it.MA The process of wearing down or rubbing away by means of friction.3How BEDMM worksElectrical arcs melt the workpiece and particles are removed by friction

Electrical arcs melt the workpiece from which particles are removed by friction between its surface and a rotating brush.

4Advantages of BEDMMBrush electrodes make the process cost-effective

Electrode electrical conductor used to make contact with a nonmetallic parts

Brush electrode an electrode that looks like a bottle brush. electrode - electrical conductor used to make contact with a nonmetallic parts5Advantages of BEDMMFinishing components of complex shapes which are hard for conventional machining

The technique is applicable for finishing components of complex shapes, which are hard for conventional machining.

6Other facts of BEDMMProper parameter setting, hot electrode material, and type of power supply generator control the intensity of phases occurring in the machining zone.Allows for both the removal of burrs and flushes and the blunting of sharp edges without damaging or undercutting the machining surface.Selection of electrode material produces a uniform layer, which firmly adheres to the core and has a high content of alloying components.Brush electrodes make the process cost-effective because it reduces the time needed to machine large componentsAn electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit .7ReferencesEl-Hofy, H. (2005). Advanced Machining Processes: Nontraditional and Hybrid Machining Processes. United States of America: McGraw-Hill.Spaldo, S. (2002). Computer Studies of Brush Electrodischarge Machining with Electrodeof Alloy Steel and Tungsten, 16th Int. Conf. on Advanced Manufacturing Systems andTechnology Proceedings (AMST03), Udine, Italy, pp. 515524.Logan, B;Cheng, S;Watson, V;Estadt, G. (2007). Graphite fiber brush anodes for increased power production in air-cathode microbial fuel cells. Environ Sci Technol. Vol 41, Issue 9.