Community Research and Development Information Service - CORDIS

Optimum cutting strategy for milling PM materials in green machining

The strategy is a special technology for milling PM materials in green state with minimum break outs and optimum smooth surface. The technology is using right and left hand milling cutters, end mills with cylindrical shanks. The fundamental idea is to start always with a cut in using the down hill milling method. The milling with the starting tool will be interrupted before a cut out, before completing the milling path. To finish the milling path a new tool will be changed in. This tool starts with a cut in again but on the opposite side of the work piece. This second tool should have the opposite oriented helix (e. g. left hand oriented if the first tool was right handed). The path will be completed where the path of the first tool was interrupted. The technology is applicable for roughing and for finishing, especially for mould and die milling with simple (groove) and complicated 3D contours. The technology makes the green machining possible without break outs and smooth surfaces. The process uses minimum lubrication to avoid high pressure coolant and to protect the environment.

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