The innovation of EDM (Electro Discharge Machining) has been around for more than 100 years. The primary benefit of using this approach is that it does not require heat or pressure to cut through products.
This method is used in numerous fields such as aerospace, automotive, medical, military, durable goods, etc. This technique is also known as Electro Machining. There are many types of EDM devices which are readily available in the market. They are broadly classified into 2 types, handbook and automatic. Manual EDM is primarily used for little jobs where there is no requirement for high accuracy.
Automatic EDM makers are primarily utilized in big scale jobs where there is a need for high precision. One of the most essential advantages of EDM over other machining procedures is that it is less prone to mistakes and can supply better accuracy.
EDM devices are essentially based on 2 technologies, wire discharge machining and electrochemical machining. The previous includes melting the metal and after that removing it from the electrode through the action of electrical current. The latter uses chemical reaction in between the electrode and the workpiece to eliminate the metal.
Wire EDM is one of the very best techniques for carrying out the above mentioned tasks. The procedure involves placing a wire with diameter between 1 and 20 microns into a machining cell. The wire acts like a cutting tool and removes material from the workpiece. This procedure is extremely comparable to wire cutting except that the wire is moving. In this case the wire acts like a torch. The speed of the wire identifies the quality of the cut. The speed of the wire is in between 5 to 25 m/s. A typical wire diameter is about 1.5 micron. This wire ought to be flexible and must have the ability to flex quickly.
In the case of air, the workpiece is placed inside a vacuum chamber and then the wire is fed into the chamber. The workpiece is put in the tank and the wire is placed into the water.
In addition to these, there are numerous other factors which figure out the quality of the cut. Some of them are:
• The voltage applied to the electrode
• The kind of wire being utilized
• The type of workpiece being used
• The distance between the wire and the workpiece
• The type of dielectric fluid being used
• The frequency of the electrical existing
• The type of tool holder
• The temperature of the wire
The above mentioned aspects affect the performance of the machine. Hence, in order to get excellent results, it is very important to understand the basic principles of EDM.