Dr. Marco Speich Profile

Dr. Marco Speich

at aacurat GmbH

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Publications (2)

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Proceedings Article | 30 June 2016 Paper

Fluid jet polishing of steel moulds

Victor Grün, Rainer Börret, Marco Speich, Dominik Wiedemann

Proceedings Volume 10009, 100090J (2016) https://doi.org/10.1117/12.2235998

KEYWORDS: Polishing, Surface finishing, Glasses, Polymers, Materials processing, Computer aided design, Nickel, Aluminum, Indium nitride, Manufacturing

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Fluid Jet Polishing (FJP) is a novel polishing technology, which experienced growing interest for niche applications over the recent years. This publication suggests FJP for processing of steel moulds for plastic injection moulding. These moulds are typically finished manually by skilled experts to date. FJP is capable of complementing the manual procedure or even replacing it. Fundamental knowledge about the process and its special tool function is provided. An experimental setup is demonstrated along with a polishing strategy and first results on different materials. It is shown, that it is possible to smoothen residual features from grinding, milling and turning below 0.12 mm. Furthermore an extract of current research is illustrated. Lastly a recently designed and built robot cell is presented, which is developed towards automation of the Fluid Jet Polishing process in the near future.

Proceedings Article | 25 September 2014 Paper

Mold production for polymer optics

Rainer Boerret, Jonas Raab, Marco Speich

Proceedings Volume 9192, 91921L (2014) https://doi.org/10.1117/12.2060670

KEYWORDS: Polishing, Surface finishing, Polymers, Optics manufacturing, Diamond, Neodymium, Software development, Nickel, Head, Robotic systems

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The fields of application for polymer optics are huge and thus the need for polymer optics is steadily growing. Most polymer optics are produced in high numbers by injection molding. Therefore molds and dies that fulfill special requirements are needed. Polishing is usually the last process in the common process chain for production of molds for polymer optics. Usually this process step is done manually by experienced polishers. Due to the small number of skilled professionals and health problems because of the monotonous work the idea was to support or probably supersede manual polishing. Polishing using an industrial robot as movement system enables totally new possibilities in automated polishing. This work focuses on the surface generation with a newly designed polishing setup and on the code generation for the robot movement. The process starts on ground surfaces and with different tools and polishing agents surfaces that fulfill the requirements for injection molding of optics can be achieved. To achieve this the attention has to be focused not only on the process itself but also on tool path generation. A proprietary software developed in the Centre for Optical Technologies in Aalen University allows the tool path generation on almost any surface. This allows the usage of the newly developed polishing processes on different surfaces and enables an easy adaption. Details of process and software development will be presented as well as results from different polishing tests on different surfaces.

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