Article

Präparation von Mikrofräswerkzeugen aus Vollhartmetall mit elastisch gebundenen Schleifkörpern

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Chapter
In this article investigations on micromilling of hardened tool steels as well as developments for an efficient process design are presented. In the course of this, suitable parameter ranges as well as process instructions are given, with which stable micromilling processes of hardened tool steels can be achieved. Besides the analysis of the milling process, a developed simulation technique is presented, which can be used to design and optimize the machining process. For further optimization, the cutting edge preparation of micromilling tools by wet abrasive jet machining and millpolishing and its influence on the manufacturing results are discussed. The production and application of functional surface structures in forming processes is additionally examined. Approaches and developed software are presented, with which machining programs for large-area structures as well as free-formed component surfaces can be generated with minimal effort within the CAD/CAM environment. Besides the derived process chain and tools for an efficient generation of machining programs, the performance and wear behavior of the surface structures is considered.
Article
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Micro milling is commonly used industrially for the production of precision components. Premature tool wear is usually the reason for a short tool life of cemented carbide end mills. An approach to improve the tool wear behavior is the defined cutting edge preparation. In this contribution, experimental investigations on the formation of cutting edge geometry during immersed tumbling of micro milling tools are presented and discussed. It could be shown that it is possible to prepare end mills with a diameter D = 1 mm and to generate edge radii of 4.0 μm ≤ rβ ≤ 31.2 μm. Investigations about the correlations between the cutting edge geometry and the tool wear behavior in micro milling operations showed decreased flank and crater wear as a result of an appropriate cutting edge preparation.
Article
Tool life and performance are decisively determined by cutting edge geometry. An appropriate shape of the cutting edge improves wear resistance, tool life and process reliability. This paper reviews major developments in cutting edge preparation technologies and methods of cutting edge characterization. Moreover, the influences of cutting edge geometry on chip formation, material flow, as well as mechanical and thermal loads on the tool are discussed. The essential modeling and simulation approaches are presented. Effects on surface integrity are described. Finally, an overview of important perceptions for prospective research and development in this field is provided.
Tauchgleitläppen zur Schneidkantenpräparation von Mikrofräsern-Prozessanalyse mithilfe experimenteller Versuche und analytischer Betrachtungen
  • E Uhlmann
  • A Löwenstein
Uhlmann, E.; Löwenstein, A.: Tauchgleitläppen zur Schneidkantenpräparation von Mikrofräsern-Prozessanalyse mithilfe experimenteller Versuche und analytischer Betrachtungen. In: wt Werkstatttechnik online, 102 (2012) 11/12, S. 735-743
Angewandte Mikrotechnik-LIGA, Laser, Feinwerktechnik ; mit … zahlreichen Tabellen und CD-ROM
  • R Brück
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Brück, R. (Hrsg.): Angewandte Mikrotechnik-LIGA, Laser, Feinwerktechnik ; mit … zahlreichen Tabellen und CD-ROM. München: Hanser, 2001
Schriftenreihe des ISF
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Schwietering, C.: Technologische Aspekte der mikromechanischen Fräsbearbeitung mit Schaftwerkzeugen. Zugl.: Dortmund, Univ., Diss., 2003. Schriftenreihe des ISF, Bd. 21. Essen: Vulkan Verlag, 2003
Schneidkantenpräparation von Mikro-fräsern-Vergleich zweier Verfahren hinsichtlich Präparationseffekten und Werzkzeugperformance
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Uhlmann, E.; Löwenstein, A.; Mahr, F.; Oberschmidt, D.: Schneidkantenpräparation von Mikro-fräsern-Vergleich zweier Verfahren hinsichtlich Präparationseffekten und Werzkzeugperformance. In: wt Werkstatttechnik online, 101 (2011) 1/2, S. 73-80
Schneidkantenpräparation von Mikrofräsern-Vergleich unterschiedlicher Feinbearbeitungsverfahren. in: wt Werkstatttechnik online
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Uhlmann, E.; Oberschmidt, D.; Löwenstein, A.; Polte, M.: Schneidkantenpräparation von Mikrofräsern-Vergleich unterschiedlicher Feinbearbeitungsverfahren. in: wt Werkstatttechnik online, 105 (2015) 11/12, S. 805-811
Mit elastisch gebundenen Scheiben die Kanten Verrunden
  • D Biermann
  • T Heymann
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Biermann, D.; Heymann, T.; Wolf, M.; Brodbeck, J.; Rothenaicher, S.: Mit elastisch gebundenen Scheiben die Kanten Verrunden. In: WB-Werkstatt und Betrieb (2014) 1-2, S. 84-87
Kinematiken zum Polieren von Mikrostrukturen
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Brinksmeier, E.; Oltmann, R.; Schulte, H.: Kinematiken zum Polieren von Mikrostrukturen. In: wt Werkstatttechnik online (2007), S. 431-436
Ultraprecision grinding
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Brinksmeier, E.; Mutlugünes, X. Klocke, F.; Auich, J. Shorem, P.; Ohmorim, H.: Ultraprecision grinding. In: CIRP Annals-Manufacturing Technology (2010), S. 652-671