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检索条件"机构=Fraunhofer Institute for Machine Tools and Forming Technology"

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A survey on sustainability approaches in manufacturing 30

A survey on sustainability approaches in manufacturing

引用

30th CIRP Life Cycle Engineering Conference, LCE 2023

作者： Prell, Bastian Reinhardt, Heiner Mauersberger, Anton Rauscher, Alexander Reiff-Stephan, Jörg Ihlenfeldt, Steffen Technical University of Applied Sciences Wildau Hochschulring 1 Wildau15745 Germany Fraunhofer Institute for Machine Tools and Forming Technology IWU Reichenhainer Straße 88 Chemnitz09126 Germany

Awareness about climate change has led to policies and regulations but also customer preferences favoring sustainable production. Thus, producing businesses are confronted by this, as they consume a large share of resources. Therefore, when producing, additional dimensions beyond commercial feasibility ought to be considered. Here, literature on sustainability from the field of engineering science is systematically searched and analyzed for approaches leading to actual recommendations for action. Hence, this bottom-up approach, incorporating the production engineers' point of view, represents an inside view of how the topic of sustainability has arrived at production companies. The focus on commercial feasibility ensures high relevance to practice, as production needs to become both sustainable and competitive. Even though exemplary collections of different approaches addressing the topic of sustainability in production can be found in literature, novelty is provided by the structured manner literature was collected and the special focus on approaches leading to practice-relevant recommendations for action. Thus, a comprehensive overview of approaches applicable to the manufacturing domain is presented. © 2023 The Authors. Published by Elsevier B.V.

关键词： Sustainable development

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Systematic Evaluation of Hybrid Portfolios for Solution Providers in machinery Engineering

Systematic Evaluation of Hybrid Portfolios for Solution Prov...

引用

2024 Portland International Conference on Management of Engineering and technology, PICMET 2024

作者： Riesener, Michael Keuper, Alexander Bobmann, Carsten Schulz-Isenbeck, Timm Schuh, Gunther RWTH Aachen University Laboratory for Machine Tools and Production Engineering WZL Aachen Germany Fraunhofer Institute for Production Technology IPT Aachen Germany

ISBN: (纸本)9781890843458

The change from traditional manufacturers to solution providers represents a comprehensive business reorientation. As a solution provider, manufacturing companies emphasize on the customer's benefit. Through the combination of physical prod-ucts, software and services, individual solutions are provided for the customer in order to achieve the greatest possible added value. The transformation has a particular impact on the structure and composition of traditional portfolios in machinery engineering, since new software and service components are gradually added. Therefore, portfolio evaluation methods need to address hybrid portfolios in order to manage the transformation effectively. Ex-isting portfolio management approaches are limited to structuring physical product portfolios only. Thus, this paper develops a new methodology to evaluate hybrid portfolios. A comprehensive framework is employed integrating portfolio evaluation techniques and technology management principles to analyze and op-timize hybrid portfolios. The evaluation comprises two principal evaluation fields, which consider both external market and inter-nal perspectives to identify strategic directions for portfolio and technology management. By systematizing the portfolio evaluation, the results contribute to the transformation into solution pro-viders, encompassing increasing software and services. © 2024 PICMET.

关键词： Investments

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Micro structure rolling process with laser structured roller tools 21

Micro structure rolling process with laser structured roller...

引用

21st International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2021

作者： Schmidt, Torsten Gärtner, Eric Schneider, Jörg Edelmann, Jan Fraunhofer Institute for Machine Tools and Forming Technology IWU Chemnitz Germany

ISBN: (纸本)9780995775190

In recent years, there has been an enormous increase in the need to specifically functionalize surfaces through microstructures and coatings. This is an attempt to meet increased performance requirements and the use of new materials in mechanical and automotive engineering. In most scientific publications on this subject, microstructures are created by laser ablation. However, this process is often not economical in the context of large-scale production. The structure rolling process for microstructuring of rotationally symmetric workpieces can close this gap. Short process times, comparatively simple handling and resource-efficient structuring characterize the structure rolling process. In the publication the workflow for structuring typical components is described. In addition, different processing strategies for the production of structured rolls using laser material processing are presented and compared. Based on the optimal manufacturing strategy derived from this, several structured rollers with different microstructure variants were manufactured. The successful application of the workflow and the tooling concept used for the structure rolling process is validated by experimental replication tests with different microstructures. The main focus is on the evaluation of the methodology for predicting and setting the necessary embossing force on the structure rolling tool to achieve the required structure depth. © 2021 Proceedings of the 21st International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2021. All rights reserved.

关键词： Tribology

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ML-Pipeline for the Quality Assessment of Screwdriving Processes 17

ML-Pipeline for the Quality Assessment of Screwdriving Proce...

引用

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

作者： Wende, Martin Bender, Marcel Frye, Maik Grunert, Dennis Schmitt, Robert H. Fraunhofer Institute for Production Technology IPT Aachen Germany Laboratory for Machine Tools and Production Engineering WZL RWTH Aachen University Aachen Germany

Current quality assessment methods of screwdriving processes evaluate the final torque-angle combination only. Consequently, anomalies and errors during the screwdriving process may remain unnoticed. Furthermore, the cause of an error cannot always be determined. We present an ML-pipeline for the assessment of screwing operations based on time series data of the entire process. The analysis is performed using the publicly available AURSAD dataset. The transfer onto screwdriving processes of the commercial vehicle production is likewise discussed. We find that the ML-pipeline performance is highly dependent on the combined consideration of preprocessing methods and model training. © 2024 Elsevier B.V.. All rights reserved.

关键词： Time series

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Derivation of Targets for the Portfolio Planning of a Solution Provider in machinery Engineering

Derivation of Targets for the Portfolio Planning of a Soluti...

引用

2024 Portland International Conference on Management of Engineering and technology, PICMET 2024

作者： Riesener, Michael Keuper, Alexander Bobmann, Carsten Schuh, Gunther RWTH Aachen University Laboratory for Machine Tools and Production Engineering WZL Aachen Germany Fraunhofer Institute for Production Technology IPT Aachen Germany

ISBN: (纸本)9781890843458

Companies in the machinery engineering sector are increasingly forced to make a strategic decision to transform from product to solution providers. Increasing competitive pressure from international competitors, fewer technological differentiation options for mechatronic products, increased establishment of software applications and increasingly individualized customer requirements are posing challenges for companies. The transformation into a solution provider is one way to address these challenges. In addition, the transformation promises stable sales in the long term and the opportunity to use the resources utilized longer and more intensively in terms of the circular economy. Accordingly, solution providers are no longer selling products, but rather individualized bundles of products, services and software applications in result-oriented business models. However, companies lack a suitable target system for the planning of the portfolio for this transformation. The target system provides a framework to make decisions about the necessary products, services and software applications in the portfolio as well as the most reasonable composition of portfolio elements for individualized solutions. To this end, this paper derives and describes the corresponding targets and associated target dimensions for planning the portfolio of solution providers. © 2024 PICMET.

关键词： Sales

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Establishing Sustainable Business Models Through Subscription in machinery and Plant Engineering

Establishing Sustainable Business Models Through Subscriptio...

引用

2024 Portland International Conference on Management of Engineering and technology, PICMET 2024

作者： Riesener, Michael Keuper, Alexander Bobmann, Carsten Smerz, Jonathan Schulz-Isenbeck, Timm Schuh, Gunther RWTH Aachen University Laboratory for Machine Tools and Production Engineering WZL Aachen Germany Fraunhofer Institute for Production Technology IPT Aachen Germany

ISBN: (纸本)9781890843458

Companies in machinery and plant engineering make a significant contribution to global greenhouse gas emissions and the use of raw materials. Therefore, they have decisive poten-tial to make better use of resources, increase efficiency and avoid overproduction with regard to a more sustainable economy. How-ever, sustainability is not necessarily an end in itself for companies and must therefore be motivated by incentives. In addition to po-litical legislation and its mandatory implementation of sustainabil-ity initiatives, there must also be financial incentives for compa-nies. In this way, sustainable companies can be successful in a competitive environment in the long term. By using subscription mod-els, companies can establish a long-term and stronger connection to the products and customers. The resulting longer and more in-tensive use of the utilized resources or the extension of the life cycle through upgrades make a significant contribution to sustainabil-ity. This paper therefore examines the effect of subscription mod-els on the establishment of sustainable business models. On the one hand, interdependencies between subscription models and sus-tainable business models are determined. On the other hand, these interdependencies are analyzed concerning influencing factors for sustainability. © 2024 PICMET.

关键词： Kyoto Protocol

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INVESTIGATION ON REDUCTION OF TOOL WEAR IN ELECTRICAL DISCHARGE FINISHING PROCESSES WITH GRAPHITE TOOL ELECTRODES 39

INVESTIGATION ON REDUCTION OF TOOL WEAR IN ELECTRICAL DISCHA...

引用

39th Annual Meeting of the American Society for Precision Engineering, ASPE 2024

作者： Uhlmann, Eckart Polte, Mitchel Lezama, Sergio Thißen, Kai Institute for Machine Tools and Factory Management IWF Technische Universität Berlin Berlin Germany Fraunhofer Institute for Production Systems and Design Technology Berlin Germany

ISBN: (纸本)9781887706612

In order to meet the increasing demand for products with complex geometries, the investigation of the use of novel materials for Electrical Discharge Machining (EDM) processes is necessary. In the case of Sinking Electrical Discharge machine (S-EDM) it has been proven that the use of graphite tool electrodes enables a high material removal rate while maintaining a low relative tool wear in roughing operations. However for finishing operations, copper is still the most used material due to its lower relative tool wear. Nevertheless, the manufacturing of graphite tool electrodes with complex geometries is more cost-effective in comparison with copper tool electrodes. This makes graphite a suitable alternative material for EDM finishing operations, if the parameters used ensure a low relative tool wear whilist achieving the desired surface roughness in adequate machining times. © 2024 Proceedings - ASPE 2024 Annual Meeting. All rights reserved.

关键词： Graphite electrodes

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Open Source Hardware in Manufacturing – Opportunities and Challenges 9th

Open Source Hardware in Manufacturing – Opportunities and C...

引用

Production Processes and Product Evolution in the Age of Disruption - Proceedings of the 9th Changeable, Agile, Reconfigurable and Virtual Production Conference CARV2023 and the 11th World Mass Customization and Personalization Conference MCPC2023

作者： Stange, Maximilian Jäpel, Nicole Reichelt, Dirk Ihlenfeldt, Steffen Fraunhofer Institute for Machine Tools and Forming Technology IWU Chemnitz Germany Hochschule Für Technik Und Wirtschaft Dresden Dresden Germany Institute of Mechatronic Engineering Technosphere Universität Dresden Dresden Germany

ISBN: (纸本)9783031348204

Manufacturing companies are operating in an environment that is becoming steadily more challenging and uncertain. The most serious risks in developed countries increasingly concern the shortage of skilled workers, growing competition from emerging countries, and ever-shorter development cycles for products that are expected to meet a growing variety of individual customer requirements. In addition, on a macroeconomic level, labour productivity growth is declining. This is a warning sign for the overall economic outlook, which is particularly true for the European economic area. One of the reasons for this is the decreasing diffusion of innovations. A holistic approach is needed to address these challenges. One direction that has been discussed in recent years is the concept of open source hardware. This concept takes up the philosophy of open source software and aims to transfer this open and collaborative approach to physical products. The paper will present the current state of OSH, specifically focusing on its use in manufacturing companies. Based on this, opportunities and risks for the application of OSH to manufacturing companies will be derived. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Open source software

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Enhanced No-Code Finger-Gesture-Based Robot Programming: Simultaneous Path and Contour Awareness for Orientation Estimation

Enhanced No-Code Finger-Gesture-Based Robot Programming: Sim...

引用

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

The programming of industrial robots necessitates specialized expertise and significant time and effort, particularly for small batch sizes. However, with the increasing demand for agility in production, the solutions used for robot programming have evolved significantly. Intuitive robot programming systems based on diverse concepts have been introduced to facilitate rapid deployment of robot systems. One such approved concept is no-code robot programming with finger-based gesture. In this concept, non-expert users draw a robot path via finger movement, which is subsequently translated into robot programming language to facilitate the corresponding movement. A significant challenge associated with this method is the valid replication of the corresponding robot Tool Center Point (TCP) orientation. Reachability issues, non-compliant hand contortions, and sensor occlusions make it difficult to directly derive the robot’s TCP orientation from the finger’s orientation. This work presents two novel approaches for estimating robot orientation using numerical analysis and point cloud information for finger-based robot programming without requiring prior knowledge. The first approach utilizes numerical analysis to estimate the relative robot orientation based on the geometry of the trajectory. In contrast, the second approach uses point-cloud to derive the robot orientation based on the object contour. Input shaping algorithms are employed and evaluated to reduce the divergence in the orientation estimations. Experiments demonstrate the effectiveness of the proposed approach utilizing a low-cost camera as a cost-efficient alternative to existing no-code programming strategies, potentially accelerating the real-world deployment of robotic applications in industrial environments.

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Hem flange bonding: a challenging joining process in automotive body construction 1

引用

International Congress on Vehicles of Tomorrow, 2019

作者： Jesche, Fred Menzel, Sandra Fraunhofer Institute for Machine Tools and Forming Technology Germany

ISBN: (数字)9783658297015

ISBN: (纸本)9783658297008

Hem flange bonding is widely used in the automotive body shop, especially in the manufacturing of hang-on parts such as doors, hoods and tailgates. By combining the hemming and adhesive bonding processes, components can be joined by material fit and form fit. In this way, new properties are integrated into the assembly, such as higher load-bearing capacity and improved resistance to corrosion. However, both processes also influence each other in the joining pro cess and in the further production process chain, which makes the hem flange bonding process really challenging. The paper gives an overview of the state of the art. For this purpose, based on the structure of the bonded hem flange, the requirements and criteria for quality evaluation are described. The common hemming technologies and adhesive ap plication methods as well as the industrial process chain, in which the hemming operation takes place, are presented. Essential correlations between component/process parameters and the quality in the hem flange bonded joint are discussed. fraunhofer IWU has been researching various aspects of hemming and hem flange bonding for many years and supports the industry in the analysis of assemblies and processes. Our aim is to systematically increase the quality and appearance of hem flange bonded assemblies and the robustness of hem flange bonding processes. Two current examples from research practice will provide a brief insight: Hemming adhesive dimensioning: Adhesive application plays a decisive, quality-defining role in the hemming process. At every point of the circumferential hem seam of an assembly, the adhesive quantity and adhesive position have to match the existing geometry precisely. The paper shows how the adhesive dimensioning can be carried out. Current test results on the effect of glass beads in the adhesive layer to ensure a defined adhesive layer thickness are also discussed. Hem testing: A testing device was developed at fraunhofer IWU to carry out qu

关键词： Joining

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