New MAPEX Postcard - 12

Part of a mold for replicating micro-retroreflectors. The mold has been machined by Diamond Micro Chiseling, a dedicated micro-structuring process developed at the LFM in Bremen. Size of structures: 250 µm. IWT Bremen, Ulrich Reiß.

Brinksmeier & Schönemann, CIRP Annals-Manufacturing Technology 63(1), 49–52 (2014).


Microbial-based metalworking fluids in milling operations


Daniel Meyer, Marvin Redetzky and Ekkard Brinksmeier.

Most commercial metalworking fluids (MWFs), as applied in cutting operations contain mineral-oil. Colonization of water-based MWFs bymicroorganisms is considered a problem due to metabolism of the MWF components. This paper presents a paradigm shift by exploiting the potential of substituting oilcontaining water-based MWFs in machining processes by microbial-based fluids. For the first time, specifically selected microorganisms have been applied in milling experiments and were examined regarding their lubrication performance. Compared to conventional water-based MWFs a prolonged tool life and superior surface finish were obtained in milling. From the results, the working mechanisms of microbial-based MWFs are deduced and discussed.

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