The development of graphite electrodes in the market is becoming more extensive and has gradually occupied a dominant position in the market. However, when purchasing graphite electrode materials, what should you do to choose the right one?
The material of graphite electrodes can be divided into grades with different proportions according to their particle size. For users, the choice of graphite electrode material is very crucial, because it directly affects the speed of electrical discharge machining. Therefore, with different types of graphite electrodes, the key is to choose a good graphite electrode material according to processing conditions.
The size of graphite particles determines their degree of loss. The larger the particle, the greater the loss, and the smaller the particle, the smaller the loss. At the same time, graphite particles also determine the roughness of their surface, so when choosing graphite electrode materials, you must be careful.
The graphite electrodes uses are wide in the industry. We know that the melting point of graphite electrodes is extremely high because it has high heat resistance. A larger current value can be used to reduce the loss of the electrode, thereby further improving the production efficiency. When the current value is small, the loss of the electrode will increase. When the area remains the same and the pulse width remains the same, the peak current will reach a certain value and continue to increase. At this time, the processing will be unstable, and the electrode and processing will produce arc burns, which will greatly reduce the production efficiency.
The larger the current of the graphite electrode, the larger the pits of electric corrosion, so as the peak current increases, its surface will become rougher and rougher. In the beginning, the thin electrode is almost in point contact with the workpiece to discharge, and the small electrode cannot withstand excessive current and is easily damaged. Therefore, the electric current should be lowered at the beginning, and then the peak current should be increased step by step until the discharge is stable and the processing speed is fast.