High-performance cutters for micro-milling applications

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All cutting tools had two cutting edges and a ball nose and were operated at a speed of n = 39,810 rpm. The lot size to be produced using this method was 50 embossing dies per year. The machining time for these 50 parts took a total of 252 hours with the micro-tools, compared with 843 hours when using the gravers. The increased service life produced a further advantage: it was tripled in the case of the micro-cutters.

Due to the short machining times, it was possible to reduce the production costs by 69% (image 4 below). This corresponds to savings of over €58,000 a year for 50 parts. The gravers could thus be successfully replaced by the micro-HSC-Lline cutting tools from LMT Tools.

Micro-tools also for lightweight materials

The increasing importance of lightweight materials, for example, CFRP composites, is also taken into account through special PCD tipped drills. They are available in diameters from 0.8 mm and permit reproducible tolerances up to IT8.

The tool costs are further reduced as it is possible to regrind them. CBN tipped tools from 0.4 mm are also available for abrasive materials. The product range is completed by small taps from M1.6.

Teamwork between the manufacturer and users is of elementary importance for the successful and economic use of these micro-tools. The early inclusion of the tool manufacturer in the user's planning and development processes is therefore desirable.

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