The material of the graphite electrode can be divided i […]
The material of the graphite electrode can be divided into different grades according to its particle size. Of course, for the user, the selection of the material of the graphite electrode is very critical because it directly affects the speed of electrical processing, so it depends on different processing. In the case, choose a high quality graphite electrode material.
We know that the graphite electrode has a very high melting point because it has extremely high heat resistance, can reduce the loss of the electrode with a large current value, and further improve the production efficiency; when the current value is small, the loss of the electrode is Will increase. When the area is constant and the pulse width is constant, the peak current will reach a certain value and continue to increase, and then the processing instability will occur, and the arc and the burn will be generated by the electrode and the processing, which will greatly reduce the production efficiency.
The larger the current of the graphite electrode, the larger the pit of the galvanic corrosion, and as the peak current increases, its surface becomes rougher. At the beginning, the sheet electrode is almost in point contact with the workpiece discharge. The small electrode can not withstand excessive current and is easily damaged. Therefore, the current should be turned down at the beginning, and then the peak current should be gradually increased until the discharge is stable and the processing speed is the fastest. .
The size of the graphite particles determines the degree of loss. The larger the particles, the greater the loss, the smaller the loss of the particles, and the graphite particles determine the roughness of the surface. Therefore, when selecting graphite electrode materials, Be careful.