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Process for pilot hole fabrication in wire cutting (Electrical Discharge Machining, EDM) to improve length/diameter-ratio and precision

Developed at KIT (Karlsruhe Institute of Technology) for Test-Blanket-Module components, this technology offers increases limits in length/diameter ratio and precision (drift) of pilot holes used for Electrical Discharge Machining (wire cutting). Instead of fabricating a start hole e.g. by deep-hole drilling, grooves are machined into the surface of bodies by standard machining. The bodies are then joined together using diffusion welding. Thus, limits in terms of length/diameter ration as well as drift along the drill axis can be eliminated. This fusion based technology and know-how could now find promising applications in the field of hard metal processing companies and EDM equipment manufacturers.

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