Fachbereich Maschinenbau und Mechatronik
Refine
Year of publication
- 2024 (6)
- 2023 (7)
- 2022 (11)
- 2021 (4)
- 2020 (11)
- 2019 (17)
- 2018 (10)
- 2017 (10)
- 2016 (12)
- 2015 (16)
- 2014 (3)
- 2013 (6)
- 2012 (14)
- 2011 (12)
- 2010 (12)
- 2009 (9)
- 2008 (8)
- 2007 (10)
- 2006 (15)
- 2005 (8)
- 2004 (5)
- 2003 (7)
- 2002 (1)
- 2001 (2)
- 2000 (1)
- 1999 (1)
- 1998 (6)
- 1997 (5)
- 1996 (5)
- 1995 (6)
- 1994 (10)
- 1993 (1)
- 1992 (3)
- 1991 (2)
- 1990 (2)
- 1989 (3)
- 1988 (4)
- 1987 (5)
- 1986 (2)
- 1985 (5)
- 1984 (6)
- 1983 (5)
- 1981 (1)
Institute
- Fachbereich Maschinenbau und Mechatronik (289)
- MASKOR Institut für Mobile Autonome Systeme und Kognitive Robotik (20)
- ECSM European Center for Sustainable Mobility (4)
- Fachbereich Elektrotechnik und Informationstechnik (4)
- Fachbereich Luft- und Raumfahrttechnik (3)
- IaAM - Institut für angewandte Automation und Mechatronik (2)
- Fachbereich Chemie und Biotechnologie (1)
- Fachbereich Medizintechnik und Technomathematik (1)
- Fachbereich Wirtschaftswissenschaften (1)
- IfB - Institut für Bioengineering (1)
Language
- English (289) (remove)
Document Type
- Article (156)
- Conference Proceeding (108)
- Book (8)
- Part of a Book (8)
- Lecture (3)
- Doctoral Thesis (2)
- Bachelor Thesis (1)
- Contribution to a Periodical (1)
- Master's Thesis (1)
- Report (1)
Keywords
- Additive manufacturing (5)
- Additive Manufacturing (4)
- Gamification (4)
- additive manufacturing (4)
- LPBF (3)
- SLM (3)
- Actuators (2)
- Aktor (2)
- Aktoren (2)
- Brake set-up (2)
Establishing high-performance polymers in additive manufacturing opens up new industrial applications. Polyetheretherketone (PEEK) was initially used in aerospace but is now widely applied in automotive, electronics, and medical industries. This study focuses on developing applications using PEEK and Fused Filament Fabrication for cost-efficient vulcanization injection mold production. A proof of concept confirms PEEK’s suitability for AM mold making, withstanding vulcanization conditions. Printing PEEK above its glass transition temperature of 145 °C is preferable due to its narrow process window. A new process strategy at room temperature is discussed, with micrographs showing improved inter-layer bonding at 410°C nozzle temperature and 0.1 mm layer thickness. Minimizing the layer thickness from 0.15 mm to 0.1 mm improves tensile strength by 16%.
This paper presents the laser-based powder bed fusion (L-PBF) using various glass powders (borosilicate and quartz glass). Compared to metals, these require adapted process strategies. First, the glass powders were characterized with regard to their material properties and their processability in the powder bed. This was followed by investigations of the melting behavior of the glass powders with different laser wavelengths (10.6 µm, 1070 nm). In particular, the experimental setup of a CO2 laser was adapted for the processing of glass powder. An experimental setup with integrated coaxial temperature measurement/control and an inductively heatable build platform was created. This allowed the L-PBF process to be carried out at the transformation temperature of the glasses. Furthermore, the component’s material quality was analyzed on three-dimensional test specimen with regard to porosity, roughness, density and geometrical accuracy in order to evaluate the developed L-PBF parameters and to open up possible applications.
As researchers continue to seek the expansion of the material base for additive manufacturing, there is a need to focus attention on the Ni–Cu group of alloys which conventionally has wide industrial applications. In this work, the G-NiCu30Nb casting alloy, a variant of the Monel family of alloys with Nb and high Si content is, for the first time, processed via the laser powder bed fusion process (LPBF). Being novel to the LPBF processes, optimum LPBF parameters were determined, and hardness and tensile tests were performed in as-built conditions and after heat treatment at 1000 °C. Microstructures of the as-cast and the as-built condition were compared. Highly dense samples (99.8% density) were achieved after varying hatch distance (80 µm and 140 µm) with scanning speed (550 mm/s–1500 mm/s). There was no significant difference in microhardness between varied hatch distance print sets. Microhardness of the as-built condition (247 HV0.2) exceeded the as-cast microhardness (179 HV0.2.). Tensile specimens built in vertical (V) and horizontal (H) orientations revealed degrees of anisotropy and were superior to conventionally reported figures. Post heat treatment increased ductility from 20% to 31% (V), as well as from 16% to 25% (H), while ultimate tensile strength (UTS) and yield strength (YS) were considerably reduced.
For smaller railway operators or those with a diverse fleet, it can be difficult to collect sufficient data to improve maintenance programs. At the same time, new rules such as entity in charge of maintenance – ECM – regulations impose an additional workload by requiring a dedicated maintenance management system and specific reports. The RailCrowd platform sets out to facilitate compliance with ECM and similar regulations while at the same time pooling anonymised fleet data across operators to form virtual fleets, providing greater data insights.
Rapid Prototyping
(2003)
Rapid Prototyping
(2004)
Rapid Prototyping and PIV
(2001)
The development of protype applications with sensors and actuators in the automation industry requires tools that are independent of manufacturer, and are flexible enough to be modified or extended for any specific requirements. Currently, developing prototypes with industrial sensors and actuators is not straightforward. First of all, the exchange of information depends on the industrial protocol that these devices have. Second, a specific configuration and installation is done based on the hardware that is used, such as automation controllers or industrial gateways. This means that the development for a specific industrial protocol, highly depends on the hardware and the software that vendors provide. In this work we propose a rapid-prototyping framework based on Arduino to solve this problem. For this project we have focused to work with the IO-Link protocol. The framework consists of an Arduino shield that acts as the physical layer, and a software that implements the IO-Link Master protocol. The main advantage of such framework is that an application with industrial devices can be rapid-prototyped with ease as its vendor independent, open-source and can be ported easily to other Arduino compatible boards. In comparison, a typical approach requires proprietary hardware, is not easy to port to another system and is closed-source.
Rapid Tooling
(2019)
Rare event simulation to optimise maintenance intervals of safety critical redundant subsystems
(2018)
The radio-based wireless data communication has made the realization of new technical solutions possible in many fields of the automation technology (AT). For about ten years, a constant disproportionate growth of wireless technologies can be observed in the automation technology.
However, it shows that especially for the AT, conventional technologies of office automation are unsuitable and/or not manageable. The employment of mobile services in the industrial automation technology has the potential of significant cost and time savings. This leads to an increased productivity in various fields of the AT, for example in the factory and process automation or in production logistics. In this paper technologies and solutions for an automation-suited supply of mobile wireless services will be introduced under the criteria of real time suitability, IT-security and service orientation.
Emphasis will be put on the investigation and development of wireless convergence layers for different radio technologies, on the central provision of support services for an easy-to-use, central, backup enabled management of combined wired / wireless networks and on the study on integrability in a Profinet real-time Ethernet network.
In the face of the current trend towards larger and more complex production tasks in the SLM process and the current limitations in terms of maximum build space, the welding of SLM components to each other or to conventionally manufactured parts is becoming increasingly relevant. The fusion welding of SLM components made of 316L has so far been rarely investigated and if so, then for highly specialised laser welding processes. When welding with industrial gas welding processes such as MIG/MAG or TIG welding, distortions occur which are associated with the resulting residual stresses in the components. This paper investigates process-side influencing factors to avoid resulting residual stresses in SLM components made of 316L. The aim is to develop a strategy to build up SLM components as stress-free as possible in order to join them as profitably as possible with a downstream welding process. For this purpose, influencing parameters such as laser power, scan speed, but also scan vector length and different scan patterns are investigated with regard to their influence on residual stresses.