What is the discharge in the die
If from microscopic description: discharge machining principle is by mechanical control makes the negative electrode, infinite close to, but it does not contact the positively charged artifacts, produce strong electric fields. , resulting in a very big impact on the periphery of the insulating liquid particles electrons, enable a large increase its electron number in the form of a pyramid, then bombarded with extremely high acceleration and speed atomic particles on the surface of the workpiece, make its produce high temperature after fall off under the action of explosive force. Of course, the atomic particles of the electrodes are also bombarded by positive ions, causing the heat to fall off as a result of the blasting force. At the same time, a certain number of positive and negative ions and a large number of neutral particles are produced in the process. Then, some of the positive ions move to the side of the electrode and attach to the surface of the electrode, causing it to compensate for the loss. Partial negative ions are moved to the side of the artifact and attached to the surface of the artifact. At the end of the day, when a wave of repulse is working, all the shedding will be washed away with the insulating fluid. In practice, when we use different conditions, we have different roughness, velocity, loss, spark bits. The reason for this is that in the process above, it is best to synchronize the various changes in time. Of course, there is also the thermal conductivity of the electrode and the material of the workpiece. The melting point. The physical properties and the media of the density are very important.
Electric discharge machining in modern die manufacturing, and grinding machine. Milling machine. Lathe. Linear cutting etc. Have the same position, and is an indispensable process. It was invented by the Soviet union. Its history can be found in the 1960s, which can be divided into diodes and triode types. Here's how the discharge works: If from macroscopic description: discharge machining principle is through the infinite close to but not contact the positive and negative charged body (that is, the electrode and workpiece), in the role of insulating liquid (spark), the process of transform electric energy into heat energy (instantaneous 10000 degrees), so as to achieve the aim of corrosive processing products molding.
Just use the electricity to get the mold in place to get the hole you need! The mould material is very hard to make use of the drill, when it is difficult to open the hole and when the precision is high
The principle of discharge machining is clear. I want to add: Electro discharge machining general use mould has more complex parts or features, other processing method will not be able to process the part, such as too small fillet and so on characteristics, due to other processing way knife can't reach, it is thought that if we do a bullnose matching, we put the bullnose electrode, electric spark processing parts of the corrosion products, finished products are formed a fillet in contrast to the electrode. This kind of processing is relatively slow, cost relatively high, commonly used for more precise die processing.
