Mechanical Manufacturing

Eroding Technology

Wire eroding – “Like through butter.”

We cut a wide variety of workpieces and erode materials of the most diverse quality and grade on the most modern wire erosion systems: from hard metal, copper, steel, graphite, brass and sintered alloys to many more. The precise cutting process enables us to machine conductive materials, regardless of their hardness. Especially steel, titanium, PCD, CBN, HSS or carbide can be eroded with high precision. Smallest components made of carbide and other special materials can be produced.

We can wire erode up to a maximum height of 220 mm with a traverse path of 400 x 300 mm. Surface qualities of finished workpieces up to RA 0.25 µ cut with wires from 0.3 to 0.05 mm speak for themselves.

Die sinking – “Making a good impression.”

On our die-sinking EDM systems, we erode 3D geometries from die-sinking EDM electrodes made in-house or provided by the customer, e.g. from graphite or copper. We work these sometimes quite complex shapes 1:1 into workpieces made from different materials for the tool and special machine construction in. If required, the cavities for our fast injection moulds eroded. Die-sinking EDM is ideal for materials that are difficult to machine and is particularly suitable for complex contours, narrow and deep countersinks and larger mould inserts.

Even the erosion of hard metal is no particular problem – thanks to the latest technology. Surfaces of Ra 0.1 µ (mirror finish), finest rib machining, internal gear teeth, etc. are feasible in a wide variety of materials.

In die-sinking EDM, the negative shape of an electrode (e.g. made of graphite) leaves a positive imprint in your electrically conductive workpiece. This spark-erosive machining process does not create any tension in the workpiece and leaves a high surface quality.

Things to know about wire erosion

Wire erosion is a shaping manufacturing process (cutting process) that works according to the principle of spark erosion. It is also referred to as electrical discharge machining (EDM). A thin continuous brass or tungsten wire serves as the electrode. This process is mostly used for machining the outer and inner contours of hardened plates of tools. Very high tolerances can also be achieved with wire erosion, which also makes this process suitable for us in the prototyping makes it irreplaceable.

Things to know about die-sinking EDM

Die sinking is a process of spark erosion. In this process, the workpiece is in a bath of dielectric consisting of non-conductive oil or deionised water. The machine head is movable and performs the movement in the Z-axis. The table performs the movements in the X and Y axes.

Die-sinking EDM is often used in the tool and mould making are used. It is often used to produce casting moulds, dies or bending punches.

Ablation process

An electrical voltage of between 20 and 150 volts is generated between the electrode and the workpiece. The distance (spark gap) between the tool electrode and the workpiece is very small and there is a non-conductive liquid (dielectric) in it. At the narrowest point of the spark gap, the electric field concentrates until a spark flashes over, with about 0.5 to 80 amperes and up to 12000°C. This spark flashover vaporises the material. This sparkover vaporises a small part of the workpiece and a small crater-shaped depression remains.

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