Laser additive manufacturing (LAM) has been proved to be a successful technique to fabricate metallic components for a number of industries; for instance, die & mold, forging and cutting tools, and aerospace. It i...
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Laser additive manufacturing (LAM) has been proved to be a successful technique to fabricate metallic components for a number of industries; for instance, die & mold, forging and cutting tools, and aerospace. It is, however, facing multitude obstacles due to lack of maturity in terms of process knowledge, design, and qualification. This paper deals with parameters’ study and optimization of combined hot-work tool steel wire (H11) and niobium powder (Nb) deposition by laser. The process is closely analysed and compared with as well as without using Nb powder. Especially, the importance of Nb in order to refine the microstructure is discussed while taking into account the microstructure-property relationships of H11.
A very important feature of high quality gears is a low noise emission in all operating conditions. Micro-geometry of the gear is of relevance for the vibration excitation in the tooth contact and significantly affect...
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A very important feature of high quality gears is a low noise emission in all operating conditions. Micro-geometry of the gear is of relevance for the vibration excitation in the tooth contact and significantly affected by the manufacturing process, especially the finishing operations. Besides known process related effects, uncontrolled variations such as inaccuracies in the speed synchronization of different axes or vibrations influence the surface structure of the tooth flanks. In this paper a detailed simulation of the production process is presented, providing crucial information about characteristic process properties and enabling investigations on the impact of manufacturing process on gear mesh acoustics.
Lattice structures are highly recommended as lightweight components. But until now, parts with lattice structures are mainly used for illustrative purposes. This is because their modelling, dimensioning, and build pre...
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forming processes are generally characterized by a high degree of material utilization as well as short process times and, consequently, a decent economic efficiency. Considering their application in the manufacturing...
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forming processes are generally characterized by a high degree of material utilization as well as short process times and, consequently, a decent economic efficiency. Considering their application in the manufacturing of large spur gears, forming processes offer a significantly attractive characteristic for the production of essential gearing components commonly used in wind turbines or marine engines. Furthermore, the hot forming process can be defined as an incremental forming process which enables the use of relatively low forming forces and results in a more compact design of the used machines. These conveniences are utilized in terms of roll forming with round tools to form gears and threads in a competitive way. Based on experiences gained over many years of researching rolling technologies, a cross-rolling process characterized by round tools with outer gearings was elaborated to realize a hot forming process for gear rolling of large spur gears at the fraunhofer IWU Chemnitz. Based on the already researched forming of smaller dimensioned gears, rolling trials utilizing a new hot-formingmachinery - including defined inductive heating process before rolling - to realize large gears with outer diameters of up to 1000 millimeters were conducted. In terms of realizing this ambition, the derivation of the designated machine parameters for rolling large gears in real-life dimensions can be defined as a crucial factor. Consequently, the experimental research was followed by a mathematical analyzation of the forming forces, momenta as well as the necessary steps to determine the best possible scaling factors for the work pieces.
Established companies are unmatched in developing sustaining innovations, but when it comes to disruptive products, new entrants often outperform them. Despite the implementation of `agile methods' to enable short...
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Established companies are unmatched in developing sustaining innovations, but when it comes to disruptive products, new entrants often outperform them. Despite the implementation of `agile methods' to enable shorter development cycles and continuous customer feedback, the success score of most corporates still lacks market-changing innovations. Disruption is a continuous process that should start with niche products focusing on insufficiently addressed customer needs and - given a positive market feedback - continue with new variants to gain market share step-by-step. Hence, a needs-oriented definition of the initial product offer followed by a need-based planning of future product variants are essential for a disruptive product strategy. Yet, companies' failure rates of ~40% for new products show that the need-based definition of minimum viable products and the planning of later product generations is insufficient. In this paper, the authors present a framework for a disruption-oriented product planning process. Based on a literature analysis focused on methodologies supporting the development process of potentially disruptive innovations, basic criteria are derived and deficits of existing approaches are identified. The framework will help companies as a guideline to understand the overall process of how to develop disruptive innovations. It further explains the essential activities and their interactions.
A core challenge of human robot collaboration is to ensure safety. By renouncing guards potential hazards raise. In this paper an approach is presented where the actual used operating area of an industrial robot gets ...
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A core challenge of human robot collaboration is to ensure safety. By renouncing guards potential hazards raise. In this paper an approach is presented where the actual used operating area of an industrial robot gets segmented out of his whole workspace. Therefore an industrial robot gets monitored with a time of flight sensor. Subsequently the recorded 3D data gets processed and the operating area segmented by applying an octree algorithm. The information thus determined about the hazard zone can be used for an application specific adjustment of safety periphery systems. This is exemplary realized by ultrasound distance sensor modules which get individually parametrized depending on the pre-segmented operating area.
As conventional R&D often fails at achieving radical innovation in the context of increasingly uncertain environments, corporate incubators are established to provide a separate development path for innovation. St...
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As conventional R&D often fails at achieving radical innovation in the context of increasingly uncertain environments, corporate incubators are established to provide a separate development path for innovation. Startup teams are integrated or internal projects teams are provided with office space, independence and resources. Corporate incubators have become a promising solution for companies that aim at achieving structural ambidexterity, i.e. organizational ambidexterity that is embedded in corporate structure. While the current business practice shows that many different configurations of corporate incubators exist, the underlying requirements remain unclear. This paper therefore addresses the research gap by deriving a model describing the requirements for the organizational structure of corporate incubators. The authors draw from organization theory in order to derive requirement dimensions. Then, current literature on ambidexterity research is used to infer requirement parameters for each requirement dimension. From a practitioner's perspective, the developed model allows a systematic planning process that helps achieving a consistent configuration of corporate incubators, which reduces failure rates. From an academic perspective, the proposed model elaborates on the organizational requirements that underlie structural ambidexterity strategies.
Mobile machining solutions use autonomous machining units that can be transported to different part locations, making possible easy maintenance and repair of large industrial equipment. Every new part and location res...
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Mobile machining solutions use autonomous machining units that can be transported to different part locations, making possible easy maintenance and repair of large industrial equipment. Every new part and location results in different boundary conditions for the mobile machine tool-part system; influencing the dynamics of the combined system and necessitating different strategies for part/machine referencing and clamping. To facilitate efficient mutability and modularity in mobile machining solutions, this paper presents a dynamic substructuring strategy that combines the response characteristics of the mobile machine unit with different base models to obtain the synthesized mobile machine tool dynamic response. Numerical and experimental verification of the approach is provided. Framework presented can also combine measured response of parts for which models may not be available a priori. Methods presented provide experimental guidelines for establishing strategies for planning of machining strategies based on the evaluated dynamics.
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