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Drilling holes

Electrical Discharge Machining (EDM) is a modern machining method that uses electrical discharges to remove material from the machined surface. The process takes place in a liquid dielectric environment, and the tool electrode, using electric sparks, precisely shapes the material. EDM is used to machine hard materials that are difficult to machine using traditional methods, such as hardened steel, cemented carbides, titanium or nickel alloys.

The AgieCharmilles DRILL 20 ultra-fast EDM machine has an integrated rotary spindle. The X, Y and Z axes are motorized and controlled by CNC. The cast iron construction with an open front guarantees optimal temperature stability. With 300 x 200 x 300 mm (11.8 x 7.8 x 11.8 in) of travel in the X, Y and Z axes and a workpiece weight capacity of up to 300 kg (660 lbs), the AgieCharmilles DRILL 20 is the ideal all-purpose erosion machine for a wide range of applications. Data entry on the operator console is quick and easy. You can program and call up measurement cycles with just a few commands.

 

Urządzenie

Drilling machine AgieCharmilles DRILL 20
Basic technical data
X, Y, Z shifts 300 x 200 x 300mm
Detail and electrode
Max. workpiece weight 300kg
Deionization system
Electrode diameter 0.3 up to 3mm
Maximum drilling depth 200mm
Range of movement of the electrode guide 100mm
Reinforced generator 30A

How does electrical discharge machining work?

The EDM process is based on the use of controlled electrical discharges between an electrode and the workpiece. The electrode and the workpiece are immersed in a dielectric liquid (usually mineral oil or deionized water), which acts as an insulator and cools the workpiece. As a result of the current flowing between the electrode and the material, sparks are created, which cause local melting and evaporation of small fragments of the material. This process is repeated many times, which allows for the removal of material layer by layer with great precision.
How does electrical discharge machining work?

Types of electrical discharge machining

  1. Sinking EDM – uses a pre-determined electrode that is slowly inserted into the material. It is used to form complex cavities, such as dies and molds.
  2. Wire EDM – uses a thin wire instead of a solid electrode that moves around the workpiece, cutting a precisely planned shape. It is used to cut contours, holes, and highly complex shaped parts.
Types of electrical discharge machining

Applications of electrical discharge machining

 

  • Production of dies and molds – EDM is widely used for precise machining of stamping tools, injection dies and casting molds.
  • Machining of difficult-to-cut materials – EDM allows for the machining of very hard or brittle materials, such as cemented carbides, technical ceramics, heat-resistant alloys or hardened steel.
  • Creating holes with complex shapes – allows for the machining of holes with unusual shapes and very small diameters.
  • Production of precision tools – EDM is used in the production of cutting tools and components with very high dimensional accuracy.

 
Applications of electrical discharge machining

Advantages of electro-discharge machining

  • High precision – this method enables machining with very high accuracy (down to microns), which makes it ideal for the production of parts with complex shapes.
  • Possibility of machining hard materials – EDM is not limited by the hardness of the material, which means that even the hardest alloys and carbides can be machined.
  • No mechanical forces – EDM machining does not generate mechanical forces, which eliminates the risk of deformation of the processed elements.
  • Flexibility – this technique allows the creation of shapes that are difficult to obtain using traditional methods, such as complex contours, small holes and sharp angles.
Advantages of electro-discharge machining

Types of EDM machines

  1. Sinking EDM machines – used for forming recesses, they are commonly used in the production of molds and dies.
  2. Wire EDM machines – allow for precise contour cutting, ideal for the production of components with complex shapes and high accuracy.
Types of EDM machines

Summary

In summary, EDM is an advanced machining technology that enables precise forming of parts from hard materials. Although the process is time-consuming and expensive, it is widely used in the tool, aerospace, medical and automotive industries, where the highest standards of accuracy and quality are required.
Summary