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Boehler μDriller
The electro-discharge-machine (EDM) system produced by the High Pressure Group at the University of Mainz (Dr. R. Boehler) was extensively used in our group for drilling DAC gaskets in the last three years. Using the tungsten carbide rods of various diameters (70 - 500 μm) we were able to drill holes in pre-indented gaskets. Different kinds of gasket materials (stainless steel, copper and copper-beryllium alloys) were processed by the EDM system without any problem.
As it is known, the critical point of the gasket drilling for a high pressure experiment is a hole centering with respect to the indented area. Our EDM system allows to obtain holes centered with precision of several micrometers in an easy and reliable way. For example, we could produce precisely centered holes of 300 μm diameter in the gaskets with 400 μm indentation diameter used for experiment with liquid helium as pressure transmitting medium.
The machine is very robust with respect to the alignment of the hole position. Once aligned it allows to drill centered holes in more than 5-6 gaskets without additional realignment.
The electronic unit comes with an intuitive interface which allows the tuning of the main parameters of the EDM process, automatic or manual operation and precise depth control during the drilling process.
We are completely satisfied with the quality of the instrument and recommend it as a reliable and simple-in-operation EDM system for high pressure research.
Contact details:
Prof. Christine Kuntscher
Experimentalphysik II
Universitaet Augsburg
Universitaetsstr. 1
86159 Augsburg
Germany |
