http://www.electrochemicalmachining.com Just another WordPress weblog Mon, 22 Mar 2010 08:02:29 +0000 http://backend.userland.com/rss092 en Electrochemical Machining (ECM) Electrochemical Machining is an unconventional metal machining technology based on electrolysis in which the product (workpiece) is connected in an electrical circuit as anode and the tooling (electrode) as cathode. In electrochemical machining the product is processed without contact or any thermal influence. The workpiece, that has to ... http://www.electrochemicalmachining.com/articles/electrochemical-processes/electrochemical-machining-ecm http://www.electrochemicalmachining.com/articles/materials/copper-ii http://www.electrochemicalmachining.com/articles/materials/title The cathode is the electrode at which reduction takes place. In electrochemical machining the cathode is the negative electrode and is used as tool to machine the positive workpiece. The choice of cathode material is defined by the required properties like hardness, machinability, (electro-) chemical resistance, electric conductivity, erosion resistance and ... http://www.electrochemicalmachining.com/articles/electric-current/cathode Parts of the cathode can be covered with an electrically insulating coating to minimize stray current and to increase copying accuracy of the ECM process. If in electrochemical machining a counterpulse is used (for cleaning the cathode or for improving the anodic dissolution reaction), an electrically conductive coating can be used ... http://www.electrochemicalmachining.com/articles/electric-current/coating The current density - J is the ratio of the current I to the machining area A. The current density is commonly expressed in amperes per square centimetres. Electrochemical machining is performed at high current density, usually tens or even hundreds of amperes per square centimetre. Assuming an ohmic resistance of ... http://www.electrochemicalmachining.com/articles/electric-current/the-current-density Electrochemical Drilling (ECD) is an electrochemical machining technique used to manufacture, for example, cooling channels in products which can be characterised by the large length/diameter relation, where lengths of up to 800mm are not uncommon. As tool electrode a hollow tubular cathode is used. The cathode can be made of ... http://www.electrochemicalmachining.com/articles/electrochemical-processes/electrochemical-drilling-ecd Electrodischarge Machining, also called spark erosion, is one of the most accurate manufacturing processes available where the material is removed by electrical discharges. The disadvantage is that the electrical discharge between the work piece and the electrode can change the micro-structure of the product. At the same time the electrode ... http://www.electrochemicalmachining.com/articles/electrochemical-processes/electrodischarge-machining-edm Aluminium is a ductile, soft and light weight silvery white or dull grey metal. The metal is strongly corrosion resistant due to the thin layer of oxide that forms on the surface when the metal is exposed to air. Despite of that oxide layer on the surface, the pure metal ... http://www.electrochemicalmachining.com/articles/materials/aluminium Chromium is a hard, steel-gray, shiny, metal that breaks easily. The pure metal chromium can be electrochemical machined, but more often chromium will be machined as alloying element in steels or other alloys. Using chromium in steel increases the hardness and the corrosion resistance of the steel. Chromium dissolves in the ... http://www.electrochemicalmachining.com/articles/materials/chromium