A5027081579- Advanced Surface Polishing Techniques
- Advanced machining processes and optimization
- Advanced Machining and Optimization Techniques
- Metal and Thin Film Mechanics
- Nanofabrication and Lithography Techniques
- Protein purification and stability
- Advanced materials and composites
- Laser-induced spectroscopy and plasma
- Digital Transformation in Industry
- Atomic and Molecular Physics
- Diamond and Carbon-based Materials Research
- Bacteriophages and microbial interactions
- Manufacturing Process and Optimization
- Flexible and Reconfigurable Manufacturing Systems
- Advanced Measurement and Metrology Techniques
- Service and Product Innovation
- Robot Manipulation and Learning
- Transgenic Plants and Applications
- Microbial bioremediation and biosurfactants
- Wireless Power Transfer Systems
- Pigment Synthesis and Properties
- Advancements in Photolithography Techniques
- Titanium Alloys Microstructure and Properties
- Biomedical and Engineering Education
- Photochromic and Fluorescence Chemistry
Fraunhofer Institute for Production Systems and Design Technology
2008-2024
Technische Universität Berlin
2011-2024
Friedrich Schiller University Jena
1999
Since its introduction in the 1980s, 3D printing has advanced as a versatile and reliable tool with applications different fields. Among available techniques, two-photon polymerization is regarded one of most promising technologies for microscale due to ability combine high fidelity down submicron scale free-form structure design. Recently, technology been enhanced through implementation faster laser scanning strategies, well development new photoresists. This paves way wide range...
Micro milling is commonly used industrially for the production of precision components. Premature tool wear usually reason a short life cemented carbide end mills. An approach to improve behavior defined cutting edge preparation. In this contribution, experimental investigations on formation geometry during immersed tumbling micro tools are presented and discussed. It could be shown that it possible prepare mills with diameter D = 1 mm generate radii 4.0 μm ≤ rβ 31.2 μm. Investigations about...
A main reason for premature tool failure in micro milling is the irregular wear behavior of cutting tools. An approach to improve a defined edge preparation using immersed tumbling. particular challenge tools with small diameters D ≤ 0.5 mm. High loads within process can lead outbreaks and breakage. Furthermore, influence changed geometry regarding has be more examined these diameters. In this paper, diameter = 0.2 mm will prepared on presented discussed. The experiments show better an...
In micro milling, which is mostly used in mold and die making, process reliability predictability of tool failure are important. Particularly precision machining, breakage hardly detectable the requirements on accuracy very high. Immersed tumbling an appropriate for defined cutting edge preparation milling tools. Its effects like increasing wear performance life has been evaluated. this paper, different processes showed that tests occur regarding wear, forces surface quality. leads to lowest...
Given the limited availability of off-the-shelf continuum robots (CRs), researchers and engineers must design their own tailor them to specific use case requirements. Questions such as following arise: What is minimum length CR needed achieve desired dexterous workspace? And where should robot be ideally located with respect These questions are answered for a single-port setup in this paper. A projection-based method introduced that maps dimensionality required workspace from 3D 1D,...
High precision cavities are used for micro injection and embossing tools in the field of tool making mainly small batch or mass production parts. In order to fabricate a large quantity parts, wear resistant materials required. possession high hardness Young's Modulus, such often hard even impossible machine by conventional fabrication processes. Being independent work piece's mechanical properties, Micro-Electrical Discharge Machining (μEDM) is predestined this case. μEDM based on...
The ultra–precision cutting of steel materials is possible but needs modifications machine tools or the workpiece material. One approach actual research development that gives opportunity for direct surfaces with quality. Binderless–cBN here one most promising materials. paper shows results experimental studies binderless–cBN as material while turning stainless steel. Various investigations were carried out to determine wear mechanisms. Furthermore, measurements are shown regarding surface...
Cell disruption is a recurrent unit operation in biotechnology. Interesting biotechnological products like proteins, lipids or biopolymers are synthesized intracellularly and often not secreted. Furthermore, cell-free biotechnology uses defined fractions of the cytoplasm for vitro protein synthesis. Bacteria, yeast, algae filamentous fungi surrounded by rigid cell walls that have to be disrupted physical, chemical mechanical methods order retain valuable content. High pressure homogenization...
The production of mold inserts for the replication micro-lens arrays through micro-embossing could be an alternative process route compared to diamond turning or milling in order reduce time and costs. rapidly solidified aluminum alloy RSA-501 is expected form micro-structures with low surface roughness because its ultra-fine grain structure. In challenges like elastic spring back effect, pile-ups, forming accuracy depend on material behavior. Therefore, was further characterized influence...
Spectroscopy has emerged as an essential technology, particularly in decentralized utilization within point-of-care devices. These applications demand compact, cost-effective designs with reduced complexity compared traditional laboratory equipment. Achieving compactness often involves minimizing the number of components, necessitating that each remaining component fulfills multiple functions to optimize performance. However, this approach can lead significant aberrations due constructive...
Electromagnetic emission at the plasma frequency ω p and its harmonics n has been studied. Although such is well known from very low density plasmas (electron of order e ≈ 10 8 cm −3 ) now, for first time it also observed a high 23 produced by high-intensity femtosecond laser pulse. This radiation strongly connected to jets energy electrons in steep gradient collective mechanisms, probably nonlinear Langmuir waves overdense region. Theoretical investigations using particle-in-cell...
Zur Fertigung präziser Bauteile mit optischen Oberflächen unter höchster Anforderung an Maß- und Formtoleranz wird monokristalliner Diamant als Schneidstoff verwendet. Bei der Bearbeitung von Stahlwerkstoffen unterliegt exzessivem Verschleiß. Eine Möglichkeit Verschleiß zu reduzieren ist die vibrationsunterstützte Bearbeitung, bereits vielfach untersucht wurde. Ziel dargestellten Untersuchungen es, durch Substitution des Schneidstoffes eine ultrapräzise ermöglichen. Hierzu wurde das...
Vorgestellt wird ein Maschinenprototyp zur Feinbearbeitung von Werkstückkanten und -oberflächen. Dieser verfügt über integrierte optische Messtechnik, die Kontrolle der Bearbeitungsergebnisse gegebenenfalls automatisierten Nachbearbeitung eingesetzt werden kann. Mit dem Prototypen zum einen Fräswerkzeuge präpariert anderen Prozessparameter deren Effekte analysiert. Abschließend beschreibt Fachbeitrag Ansatz Auslegung Prozessparameter.   This paper presents a machine prototype for...
Beim Mikrofräsen mit Werkzeugen aus Hartmetall kommt es häufig nach kurzen Schnittwegen lc zu übermäßigem Werkzeugverschleiß. Dies beeinflusst das Bearbeitungsergebnis, die Prozesssicherheit und Wirtschaftlichkeit negativ. Ziel ist durch den Einsatz eines superharten Schneidstoffs polykristallinem Diamanten (PKD) Verschleiß beim reduzieren. Daher eine Herstellungstechnologie entwickeln, um Mikrofräswerkzeuge Schneiden PKD effizient herstellen können. Beschrieben wird grundlegende...
Die Prozesssicherheit beim Mikrofräsen lässt sich mit einer gezielten Schneidkantenverrundung erheblich steigern. Dabei werden durch verschiedene Präparationstechnologien unterschiedliche Geometrien und Einflüsse auf den Fräsprozess erzeugt. Der Fachbeitrag behandelt Einsatz präparierter Mikrowerkzeuge in Zerspanversuchen, denen die Zerspankräfte, Verschleiß sowie Oberflächengüten eingegangen wird.   Process reliability micro milling can be increased by a defined cutting edge...