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16th CIRP Conference on Intelligent Computation in Manufacturing Engineering, CIRP ICME 2022

作者： Uhlmann, Eckart Barth, Enrico Nabbout, Kaissar Sommerfeld, Martin Bock-Marbach, Benjamin Kuhnert, Jörg Dovgal, Andrey Chair of Machine Tools and Manufacturing Technology Pascalstr. 8-9 Berlin10587 Germany Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstr. 8-9 Berlin10587 Germany Otto von Guericke University Magdeburg Institute of Process Engineering Universitaetsplatz 2 Magdeburg39106 Germany Fraunhofer Institute for Industrial Mathematics ITWM Fraunhofer-Platz 1 Kaiserslautern67663 Germany

In recent years, the rise in computation and modelling capabilities has enabled first chip formation simulations for wet cutting processes. Currently, chip formation simulations are limited to a small simulation domain around the cutting edge. Hence, vague assumptions of inflow boundary conditions of the cooling lubricant must be made. In this paper, a procedure is shown to determine the boundary conditions of the free fluid jet for different cooling lubricant strategies by combination of Particle Image Velocimetry (PIV) and meshfree fluid simulations. As a result, usual assumptions of cooling lubricant boundary conditions are evaluated and deviations are identified. © 2023 Elsevier B.V.. All rights reserved.

关键词： Velocity measurement

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A No-Code Approach for Intuitive Robot Programming for Agile Welding Application

A No-Code Approach for Intuitive Robot Programming for Agile...

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International Workshop on Robot Sensing (ROSE)

作者： Jayanto Halim Mohamad Bdiwi Steffen Ihlenfeldt Group Collaborative Robot Systems Fraunhofer Institute for Machine Tools and Forming Technology Chemnitz Germany Department of Production System and Factory Automation Fraunhofer Institute for Machine Tools and Forming Technology Chemnitz Germany

ISBN: (数字)9798350362367

ISBN: (纸本)9798350362374

Agile manufacturing paradigms have revolutionized a new era of production processes, offering unparalleled flexibility and adaptability to the ever-changing landscape of product variations and smaller batch sizes. In response to this dynamic environment, the robotic industry has undergone a significant transformation, presenting a range of versatile robotic systems capable of swiftly deploying diverse applications. This transformative shift accelerates manufacturing processes and showcases the ability to accommodate product specifications and batch size variations. Welding is a notable example of robotics playing a crucial role in agile production. This work presents a novel approach combining no-code robot programming and an intelligent vision-based welding system. By leveraging this framework, even non-expert users can seamlessly instruct welding trajectories through intuitive interactions. These trajectories are meticulously crafted using advanced welding seam extraction algorithms, considering various welding joint types and inputs from heterogeneous sensors. Consequently, robot-specific parameters can be parametrized, and the generated robot code can seamlessly translate into robotic movements in the real world. Validation of this approach through real-world experiments underscores its potential for deployment in agile welding applications. The promising results affirm this novel methodology's efficacy, paving the way for its practical implementation in real-world scenarios. By effectively bridging the divide between advanced robotics and agile manufacturing, this approach can potentially elevate industrial robotic applications to new levels of efficiency and adaptability.

关键词： Agile manufacturing Service robots Welding Semantics production Robot sensing systems Mathematical models

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A Hybrid Approach of No-Code Robot Programming for Agile production: Integrating Finger-Gesture and Point Cloud

A Hybrid Approach of No-Code Robot Programming for Agile Pro...

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IEEE International Workshop on Robot and Human Communication (ROMAN)

作者： Jayanto Halim Paul Eichler Sebastian Krusche Mohamad Bdiwi Steffen Ihlenfeldt Group Collaborative Robot Systems Fraunhofer Institute for Machine Tools and Forming Technology Chemnitz Germany Departement of Production System and Factory Automation Fraunhofer Institute for Machine Tools and Forming Technology Chemnitz Germany

ISBN: (数字)9798350375022

ISBN: (纸本)9798350375039

Industrial robot programming necessitates specialized expertise and significant time commitment, particularly for small-batch productions. In response to the escalating demand for production agility, novel approaches have emerged in intuitive robot programming. These inventive systems, rooted in diverse conceptual frameworks, are designed to expedite the deployment of robot systems. A prominent innovation in this domain is adopting no-code robot programming through finger-based gestures. A robot program can be generated by capturing and tracking non-expert users’ finger movements and gestures, converting 3D coordinates into an executable robot programming language. However, accurately determining finger positions for 3D coordinates and precise geometrical features presents an ongoing challenge. In pursuit of heightened trajectory precision and reducing more significant effort for the users, we propose a hybrid methodology that amalgamates finger-gesture programming with point cloud data. This synergistic integration demonstrates promising outcomes, substantiating its potential to facilitate the precise and adaptive generation of robot paths within robot applications.

关键词： Point cloud compression Technological innovation Three-dimensional displays Service robots Tracking Robot kinematics Welding Trajectory Robots Robot programming

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Explorative Study on Benchmarking Approaches for the Improvement of Corporate Greenhouse Gas Emissions

Explorative Study on Benchmarking Approaches for the Improve...

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technology and Entrepreneurship (ICTE), International Conference on

作者： Felix Budde Florian Kidschun Business Excellence Methods Fraunhofer Institute for Production Systems and Design Technology IPK Berlin Germany

Using traditional benchmarking methods on the environmental impact of enterprises, carbon benchmarking aims to enable organizations to compare their individual carbon footprint with their peers. The insights gathered during that process allows enterprises to identify areas for improvement and make informed decisions about their carbon emissions using best practices from their industry section. This paper presents a systematic study of carbon benchmarking approaches and methodologies for the assessment, performance comparison and improvement of corporate greenhouse gas emissions. In a first step, a series of robust criteria are defined in order to respond to the specific requirements of effective carbon benchmarking, aiming for comparable and reliable results. Secondly, existing frameworks and methodologies for the assessment and performance comparison of greenhouse gas emissions (GHG) are explored through a systematic literature review. In a last step, the approaches identified are compared and evaluated by comparison group and scope. In this context, potential gaps are identified and further need for research in the field of corporate GHG reduction methods and approaches revealed.

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A method for establishing a bearing residual life prediction model for process enhancement equipment based on rotor imbalance response analysis

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Chinese Journal of Chemical Engineering 2024年第2期66卷 203-215页

作者： Feng Wang Haoran Li Zhenghui Zhang Yan Bai Hong Yin Jing Bian National Foundation Research Laboratory of Fault Prevention and Control in Hazardous Chemicals Production System Engineering Research Center of Chemical Technology SafetyBeijing University of Chemical TechnologyBeijing 100029China China Nuclear Power Engineering Co. LtdBeijing 100840China CNOOC Tianjin Chemical Research and Design Institute Co. LtdTianjin Key Laboratory of Energy and Chemical Explosion SafetyAcademician Expert Collaborative Innovation CenterTianjin 300131China

A rotating packed bed is a typical chemical process enhancement equipment that can strengthen micromixing and mass *** the operation of the rotating packed bed,the nonreactants and products irregularly adhere to the wire mesh packing in the rotor,thus resulting in an imbalance in the vibration of the rotor,which may cause serious damage to the bearing and material *** study proposes a model prediction for estimating the bearing residual life of a rotating packed bed based on rotor imbalance response *** method is used to determine the influence of the mass on the imbalance in the vibration of the rotor on bearing *** major influence on rotor vibration was found to be exerted by the imbalanced mass and its distribution radius,as revealed by the results of orthogonal *** implementing finite element analysis,the imbalance response curve for the rotating packed bed rotor was obtained,and a correlation among rotor imbalance mass,distribution radius of imbalance mass,and bearing residue life was established via data *** predicted value of the bearing life can be used as the reference basis for an early safety warning of a rotating packed bed to effectively avoid accidents.

关键词： Rotating packed bed Mass imbalance Harmonic response analysis Residual life Prediction model

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Precise cutting of cemented carbide with nanopolycrystalline diamond in ductile regime 23

Precise cutting of cemented carbide with nanopolycrystalline...

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23rd International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2023

作者： Uhlmann, Eckart Polte, Mitchel Hocke, Toni Polte, Casey Polte, Julian Institute for Machine Tools and Factory Management IWF Technische Universität Berlin Pascalstr. 8-9 Berlin10587 Germany Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstr. 8-9 Berlin10587 Germany

ISBN: (纸本)9781998999132

Today's demands on technical applications require the precise machining of high-performance materials. Cemented carbide is used as a wear-resistant material in a wide range of industrial applications, e.g. tool and mould making, mobility and medical engineering. Due to the brittle material characteristics and the resulting high hardness and wear resistance, the machining of the cemented carbide is severely limited. Long machining times and high tool wear are remaining challenges at state of the art. A novel approach for the machining of cemented carbide is the application of binderless nanopolycrystalline diamond (NPD) as cutting material for precise turning. Based on investigated fundamental cutting phenomena, within the scope of this work, the application of the novel cutting material was further investigated by comprehensive turning experiments. Turning tests were carried out with cemented carbide samples with a tungsten carbide content of CC = 88 %, a cobalt content of CCo = 12 % and a grain size of dg = 0.5 μm. Prior to the turning tests, the brittle-ductile transition as well as the minimum chip thickness were determined by dedicated spiral cutting tests as a function of the feed. In subsequent turning tests, the influence of the cutting speed, feed velocity and depth of cut were investigated. Process forces were evaluated and specimens were analysed regarding surface roughness and topography. In the course of the investigations, it could be shown that a dedicated set of process parameters enable cutting in ductile regime with great chip formation. Thus, the great potential of the novel cutting material NPD in turning of cemented carbide could be demonstrated. © 2023 Euspen Headquarters.

关键词： Turning

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Study on material-data-driven process parameterization in fine blanking 17

Study on material-data-driven process parameterization in fi...

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17th CIRP Conference on Intelligent Computation in Manufacturing Engineering, CIRP ICME 2023

作者： Ortjohann, Lucia Peters, Andreas Gerhard, Jens Becker, Marco Niemietz, Philipp Bergs, Thomas RWTH Aachen University Aachen52074 Germany Mendritzki Holding GmbH & Co. KG Bochum44793 Germany Feintool System Parts Jena GmbH Jena07749 Germany Fraunhofer Institute for Production Technology IPT Steinbachstr. 17 Aachen52074 Germany

In industrial sheet-metal processing, processes are parameterized based on the material specifications. However, the manufacturing process of sheet-metal coils determines the material properties and as every manufacturing process is subject to variations, variations in material properties occur in the semi-finished product influencing the subsequent sheet-metal processing. The production of high-quality parts requires considering these varying material properties to adapt the processes accordingly. This paper shows that material data from non-destructive eddy current measurements and process data of the coil production enable decision support for the parameterization of fine blanking processes. A material-data-driven approach using material data recorded in an industrial setting is employed to investigate the influence of parameter settings in the fine blanking process on specific quality characteristics of fine blanked workpieces. © 2024 Elsevier B.V.. All rights reserved.

关键词： Metal refining

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Analysis of various graphite types for electrical discharge finishing 23

Analysis of various graphite types for electrical discharge ...

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23rd International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2023

作者： Uhlmann, E. Polte, M. Hocke, T. Thißen, K. Bolz, R. Streckenbach, J. Institute for Machine Tools and Factory Management IWF Technische Universität Berlin Pascalstr. 8-9 Berlin10587 Germany Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstr. 8-9 Berlin10587 Germany

ISBN: (纸本)9781998999132

Nowadays graphite and copper are the most used tool electrode materials for electrical discharge machining (EDM). Especially for roughing operations to machine mould inserts made of steel, graphite allows high material removal rates, with high discharge energies and reduced relative tool wear. In addition, graphite is characterized by better machinability compared to copper, which leads to a cost-effective production of complex tool electrode geometries. To take advantage of the machinability and flexibility in producing complex tool electrode geometries, graphite is also used for EDM finishing. However, in EDM finishing, graphite shows still higher material removal rates but is also characterised by significantly higher relative tool wear compared to copper. This relative tool wear is fundamentally dependent on the material properties and the used process parameters. Therefore, this paper presents an approach for using graphite in EDM finishing operations. A parameter study was carried out using five different types of graphite to machine steel components. Within the investigations, different types of graphite with grain sizes in the range of 1.0 μm 11.0 %. Therefore, the experiments showed a great improvement regarding the relative tool wear for graphite. Ten additional graphite types will be used for further investigations to gain a deeper understanding of the tool wear mechanisms. This will enable the reliable and efficient application of graphite as a tool electrode material for EDM finishing. © 2023 Euspen Headquarters.

关键词： Cost effectiveness

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Distributed real-time production control for resilient manufacturing systems 56

Distributed real-time production control for resilient manuf...

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56th CIRP International Conference on Manufacturing systems, CIRP CMS 2023

作者： Uhlmann, Eckart Polte, Julian Mühlich, Christopher Technische Universität Berlin Institute for Machine Tools and Factory Management IWF Pascalstraße 8-9 Berlin10587 Germany Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstraße 8-9 Berlin10587 Germany

To enable resilient manufacturing, production control systems must be able to adapt quickly and flexibly to unexpected changes. Motivated by Industrie 4.0, multi-agent systems offer a promising approach to meet these requirements. This paper presents a method for distributed production control that enables production entities to make optimal decisions regarding capacity utilization and the compliance of delivery dates in real-time despite disruptive events. Based on a multi-agent Markov Decision Process, production entities are modeled as autonomous software agents that can solve Flexible Job-Shop Problems through message passing. The performance of the proposed method is evaluated in a simulated production environment. © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://***/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 56th CIRP International Conference on Manufacturing systems 2023.

关键词： distributed production control Flexible Job-Shop Problem Industrie 4.0 multi-agent system resilient manufacturing systems

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Requirements for the Development of a Performance Management system with Consideration of Unforeseeable Business Process Variants 18th

Requirements for the Development of a Performance Management...

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18th Global Conference on Sustainable Manufacturing, GCSM 2022

作者： Teng, Yu-Min Ay, Sila Iyer, Rishabh Scholz, Julia-Anne Technische Universität Berlin Straße Des 17. Juni 135 Berlin10623 Germany Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstraße 8-9 Berlin10587 Germany

ISBN: (纸本)9783031288388

Supply chain issues arising from market turbulences force companies to find new solutions in the short term. Hence, deviations from the ideally designed business processes are inevitable, especially during production planning and control. These deviations result in unforeseen process variants. In addition, process steps of those process variants are often not completely conducted with IT systems and are therefore difficult to trace. Another underlying problem lies in the bias of performance measurement of process variants because each variant aligns with different goals and framework conditions. For these and other reasons, the performance management of process variants presents a challenge. To overcome this challenge, a serious game is being further developed in a research project. The goal is to provide trainings for performance management in a turbulent business environment with the serious game. It simulates the business processes and supply chain issues of a drilling machine manufacturer and serves as a use case for the research presented in this paper. The challenges associated with the performance management of unforeseeable business process variants are derived from the use case. A gap analysis is conducted between the challenges and existing requirements for the development of performance management systems. Based on this, adjustments are proposed to existing requirements and new requirements are being developed. © 2023, The Author(s).

关键词： Serious games

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