What is the difference between EDM and WEDM?

Electrical discharge machining (EDM) is a kind of machining technology using electrical discharge machining (EDM). It is often used to process complex shapes that are difficult to be milled. It is also very suitable for machining hard materials such as titanium. There are two types of EDM: EDM, sedimentation EDM and wire EDM. The differences between the two treatment processes are considered below, and the purpose, characteristics and advantages of each treatment process are pointed out.
01. What is Sinker EDM
It is called sink EDM, sometimes RAM EDM, Volume EDM or Empty EDM.
Sinker EDM requires electrodes, insulating fluid and power supply. The power supply connects the electrode and the workpiece. The spark generated by the connection creates the channel. Unlike WEDM, WEDM services do not completely cut materials. This allows the operator to generate complex numbers. At the same time, it will not stress the material. This is a good way to produce injection moulds and stamping moulds.
Sinker EDM machines use electrodes and workpieces immersed in liquids such as oil or dielectric water. The power supply is connected to the electrode to generate potential between the two components. And create damage to create plasma channels and spark jumps. The sparks of power supply are often one after another.
With the continuous formation of sparks, the base metal begins to corrode and the electrode drops, resulting in the "collision" or "sinking" effect of this EDM machine. When this process is completed and each piece is taken out, the base metal is eroded into a very special shape or design, similar to sculpture. EDM machines produce the metal industry faster.
02. What is line discharge
Wire cutting (EDM) Wire cutting uses a single thin wire to cut thick metal to achieve precise cutting and boundary that cannot be achieved by standard CNC machine tools. Like RAM EDM, WEDM EDM uses electrodes and sparks to cut metal. Using the electric spark corrosion technology, the cutting part of the wire rod is immersed in the deionized water during the wire rod discharge machining, and the wire rod acts as the electrode. Under the condition of no contact, the wire rod part sparks into the required shape or scrap. Automatic wire feeding ensures that the welding wire is never tired, and the cutting is consistent to achieve repeatable accuracy.
During on-line EDM processing, the fine metal wire is clamped between the two diamond guides above and below the workpiece, and moves along the X and Y axes according to the CNC command. (For more complex cutting, the upper guide rail may move along other axes.) Like other EDM processes, EDM will generate sparks between the wire and the workpiece, resulting in workpiece corrosion.
The wire cutting EDM process allows the use of very fine wire (up to 20 microns in diameter), which allows very fine cutting of the workpiece. However, like the settler EDM, the usual practice is to start rough machining and then finish.
What is the difference between EDM and wire discharge?
The current is used to cut or burn conductive materials in WEDM and EDM. In both processes, the electrode will not contact the processed material. Unlike wire cutting EDM, the sinker EDM service does not completely cut the material (unless necessary), so it has a wide range of applications, such as blind cavity/keyway, thin wall or cross section. This versatility makes push and injection molding machine components sink EDM effective technology.
Sinker EDM is used to manufacture complex cavities, so it is particularly suitable for manufacturing moulds, dies and other forms of tools. Compared with other processing technologies, it can also produce sharper internal angles and deeper ribs.
Common EDM applications for sinkers include:
Rapid tooling, mold manufacturing, injection molding, mold details, sharp internal corners, blind keyways, internal splines.
Wire cutting is usually used to cut very thick hard metal plate, rather than traditional processing technology. This is a popular process for producing punches, tools and moulds. Wire cutting can produce good surface finish without deformation of parts.
The following are typical WEDM applications:
Thick plate extrusion die, blanking punch, automotive and aviation parts, tight tolerance parts, medical equipment, thin-walled parts that may break during normal processing.