Different Forms of Electrical Discharge Machining
Both original and traditional, the EDM method. There isn't only one way to go about this process, though, so this does not imply it. EDM can be classified into three categories. In the event that one type does not work well, this helps to ensure that there are other options. Electrical discharge machining comes in various forms, including:
EDM on wire
Spark EDM and wire erosion are two more names for the process known as wire EDM. A brass wire or a thin copper wire is used to cut the workpiece in this technique. The electrode here is the thin wire. Deionized water is typically used as the dielectric liquid in this situation. The wire is continuously unfolded throughout the operation using a spool to receive an automatic feed.
This is so that neither the wire nor the workpiece can interfere with the electrical discharge. As a result, the cut requires the installation of a new discharge line. This strategy is effective in a big way. But engineers should be aware that the wire needs to go all the way through the workpiece. This effectively makes two-dimensional cuts into three-dimensional pieces. The results resemble those of conventional CNC machining procedures in many cases.
An entire EDM
As its name suggests, hold drilling EDM specifically aids in quick hole drilling. To facilitate easy dielectric fluid flow, the electrodes used in hole EDM are tubular.
EDM resin can be used to create very small and deep holes as opposed to conventional drilling techniques. Deburring is not necessary for these holes either. With this approach, precision holes can be effectively drilled faster than with traditional methods, regardless of the type or hardness of the metal.
EDM sinking
Its other names are Ram EDM, die sinking, and cavity-type EDM. This is the standard EPDM. It is called the Cavity type because it produces intricate cavity forms for a range of casting applications, like plastic injection moulding.
This procedure creates a "positive" of the desired shape using electrodes made of pre-machined copper or graphite. Following that, the electrode is pressed into the workpiece to produce a negative of the original material shape. When using sinker EDM, a number of variables could affect the electrode material selection. They consist of the electrode's conductivity and resistance to erosive wear; typically, graphite is easier to work with than copper material. Copper is more conductive and stronger, though.
The benefits of electrical discharge machining
The use of EDM in production has a number of distinctive benefits. They include, among others,
Working with Any Electrically Conductive Material, Including
The first thing that comes to mind when you consider EDM production is its versatility in terms of materials that it can work with. EDM resin is always the best method, provided that your material is electrically conductive. Parts that are challenging for conventional machining techniques can now be machined as a result. Titanium and tungsten carbide components are among them.
There is no mechanical force involved.
The fact that no mechanical force is applied to the workpiece is an additional significant advantage. As a result, creating flimsy outlines is not a concern. Since little cutting force is required to remove the material, this process becomes simple. There are no mechanical stress issues because there is no contact between the tool and the workpiece.
Supports various shapes and depths
EDM makes it seem hard to use a cutting tool to reach certain shapes and depths. High tool lengths and diameter ratios make it an efficient deep processing technique. The EDM method makes it simple to cut internal corners, slots, and deep ribs
Improved Surface Finish Encourages
Additionally, manufacturers contend that using EDM rather than conventional techniques often results in a better surface polish for injection moulding. As a result of the EDM resin process, surfaces have extremely high precision and exquisite finishes, so this might be the case
Working with Hardened Material
Before the workpiece is hardened, additional conventional machining operations must be completed. EDM, however, performs flawlessly on materials that have already been hardened. Due to this, it is simple to prevent any possible heat-related deformation.