Ankrit Technologies has established a promising niche for itself with the manufacturing of carbide electrodes.
Our electrodes allow electrical discharge machining of high precision boreholes.
We currently offer tungsten electrodes with a diameter range from 70 μm to 300 μm in steps of 1 μm. Lengths between 100 mm and 500 mm are available.
The quality of the electrodes is defined by
» the constant diameter with a tolerance range of only 0.5 μm
» a high rigidity due to the material properties of tungsten
» precise roundness
» high precision of the cut edges
» galvanically polished surfaces
Tungsten is the ideal electrode material for electrical discharge machining. With a melting point of 3,422 °C and an elastic modulus which is twice as high as that of steel, this material has an extremely high useful life. This decreases wear on the electrode which has to be replaced less often than with conventional alloys.
Micro tungsten electrodes offer a wide range of applications: Fields such as micro mechanics, mechatronics and medical technology benefit from the impressive possibilities of micro EDM for the machining of tools, machine parts, surgical needles or implants and boreholes with diameters from 0.06 mm without burrs and entry deformation.
Series machining of injection holes in diesel injection nozzles can be carried out with great efficiency using tungsten electrodes. The very narrow diameter tolerances of the electrodes in the sub micrometre range play a crucial role for complying with emission limits.
Micro EDM (electrical discharge machining) refers to spark erosive material removal. It is a thermal ablating process where current discharges take place between the tool and the workpiece electrode within a gas chamber. EDM is based on a thermal function principle which is virtually free from processing forces, allowing machining irrespective of hardness and strength of the material. This makes it an established process for the manufacturing of precision components.
Using a simple cylindrical rod electrode, which is usually made of tungsten, carbide or silver, precision holes in the micro and macro range can be manufactured. The term Micro EDM is then used when the geometry to be produced is smaller than 500 microns. The high-precision electrodes have extremely small diameters down to 50 microns (0.05 mm).