The electrode produces electrical discharges that removes material from the work piece in order to attain the desired size or shape. One of the most widely-used material for the electrode is graphite. Many prefer graphite electrodes for its variability in terms of finish. Other materials used for electrodes are copper and copper tungsten.
There are several properties required from an EDM electrode. Heat-resistance and conductivity are the primary properties that must be considered. The electrical discharges produced during EDM operations generates extremely high temperature. A material with low tolerance to heat will wear away faster while conductivity dictates the cutting efficiency of the electrode. Aside from these two, structural integrity and certain mechanical properties are desired for an electrode material.
Aside from heat, the electrical discharges also produces microscopic explosive forces that can stress the electrode material. The structural integrity and mechanical properties like tensile strength and hardness of the material determines its resistance against wear resulting from these forces.
Removing Steel Shavings from Permanent Lifting Magnets Using and Adhesive Tape
A downside to many permanent lifting magnets is that it can be quite difficult to clean when steel shavings are involved. Depending on the strength of the magnet, the shavings are not going to just fall off no matter how you wipe or brush it.
An effective way of removing steel shavings from permanent lifting magnets involves the use of adhesive tapes and similar materials. Wrapping the magnet with tape and then peeling it off will remove most of the steel shavings. If the tape leaves some adhesive materials on the surface, a release agent can be used to clean it off.