检索结果-内蒙古大学图书馆

Challenges of prospective life cycle assessment of emerging recycling processes: case study of battery materials recovery

引用

Procedia CIRP 2023年 116卷 23-28页

作者： Johanna Haupt Nelli Kononova Felipe Cerdas Sabrina Zellmer Christoph Herrmann Institute of Machine Tools and Production Technology (IWF) Chair of Sustainable Manufacturing and Life Cycle Engineering Technische Universität Braunschweig Langer Kamp 19b 38106 Braunschweig Germany Battery LabFactory Braunschweig (BLB) Technische Universität Braunschweig Langer Kamp 8 38106 Braunschweig Germany Fraunhofer Institute for Surface Engineering and Thin Films IST Bienroder Weg 54E 38108 Braunschweig Germany

The aim of recycling is not only to preserve raw materials within a circular economy but also to enable a decreased environmental impact by secondary production of materials compared to primary production and other end-of-life options. In order to ensure the sound development of emerging recycling processes from an environmental perspective, the method of life cycle assessment (LCA) should be applied from the early stage on. While several frameworks for prospective LCA of emerging technologies have been proposed in recent years, existing approaches are not intended for application to recycling processes. Therefore, this paper analyses the specific challenges in the LCA of emerging recycling processes as for example varying material quality, definition of system boundaries or handling of by-products in combination with changing process chains and lack of available data. Initial methodological recommendations are given and selectively applied to the use case of Lithium-ion battery recycling. Two emerging recycling processes are evaluated assessing the environmental impacts of battery graphite recovery by flotation combined with leaching and of re-synthesis of cathode active materials using hydrometallurgical processes. The assessment results approve the importance of methodological choice within the LCA of emerging recycling processes and its influence on the further process development.

关键词： emerging technologies graphite cathode materials NMC resynthesis flotation brightway2

来源：评论

学校读者我要写书评

暂无评论

Surface integrity in high-feed roughing of Inconel 718 with SiAlON end mills

引用

Procedia CIRP 2022年 108卷 595-600页

作者： Richard Zimmermann Niklas Michel-Angeli David Welling Philipp Ganser Thomas Bergs Makino Europe GmbH Karl-Friedrich-Straße 60 52072 Aachen Germany Fraunhofer-Institute for Production Technology IPT Steinbachstraße 17 52074 Aachen Germany Laboratory for Machine Tools and Production Engineering of RWTH Aachen University Campus Boulevard 30 52074 Aachen Germany

Conventional machining processes for hard-to-machine nickel-based alloys involve carbide tools, which exhibit low productivity at high tool wear rates. Novel tool concepts such as SiAlON-ceramic high-feed end milling tools show great potential to reduce the time required for the roughing process. However, these cutting processes feature high cutting speeds while avoiding cutting fluids, which leads to high thermomechanical loads. Since an unaffected rim zone must be ensured, this paper investigates the surface integrity effects on Inconel 718 machined with SiAlON-ceramic end mills. Particularly, the cutting forces, surface temperature, microhardness and microstructural damages in the cross-section are evaluated. In the selected slot milling operation, surface temperatures of up to 1,250 °C were measured and plastic deformations could be identified up to a depth of 35.5 μm in the bottom of the slot. The side walls are affected up to a depth of 69.6 μm from the surface. Microhardness measurements of the bottom of the slot show a hardening of the machined surface of 17.9 %, which does not reach deeper than 150 μm into the basic structure.

关键词： High-feed milling Nickel-based alloys SiAlON ceramics Surface Integrity

来源：评论

学校读者我要写书评

暂无评论

Implementation of a multi-material mechanism in a laser-based powder bed fusion (PBF-LB) machine

引用

Procedia CIRP 2022年 107卷 558-563页

作者： Thomas Bareth Maximilian Binder Philipp Kindermann Veronika Stapff Armin Rieser Christian Seidel Fraunhofer IGCV (Institute for Casting Composite and Processing Technology) Am Technologiezentrum 10 86159 Augsburg Germany Technical University of Munich Institute for Machine Tools and Industrial Management Boltzmannstr. 15 85748 Garching Germany Munich University of Applied Sciences Department of Applied Sciences and Mechatronics Lothstr. 34 80335 Munich Germany

Multi-material additive manufacturing by laser-based powder bed fusion (PBF-LB) combines the advantages of additive manufacturing (AM), such as the ability to build complex structures, with the capability to create an arbitrary material distribution in one manufacturing process. This paper presents the implementation of a multi-material mechanism in a mono-material PBF-LB system. Therefore, the multi-material process and the new powder deposition mechanism are introduced. Special attention is paid to the required process steps of powder recoating and powder removal. To gain further insight into the multi-material process, dependencies between the powder removal and the manufacturing quality are described. Furthermore, the required equipment and the current challenges of multi-material additive manufacturing are highlighted. In addition, results of the material combination consisting of the tool steel 1.2709 and the copper alloy CW106C are shown and discussed.

关键词： metal additive manufacturing laser powder bed fusion multi-material laser beam melting PBF-LB/MM

来源：评论

学校读者我要写书评

暂无评论

Towards Ontology-based Lifecycle Management in Blisk Manufacturing

引用

Procedia CIRP 2022年 112卷 280-285页

作者： Sven Schiller Markus Landwehr Georg Vinogradov Iraklis Dimitriadis Haydar Akyürek Johannes Lipp Philipp Ganser Thomas Bergs Fraunhofer Institute for Production Technology (IPT) Steinbachstraße 17 52074 Aachen German Fraunhofer Institute for Applied Information Technology (FIT) Schloss Birlinghoven 1 53757 Sankt Augustin Germany Chair of Databases and Information Systems (DBIS) RWTH Aachen University Ahornstraße 55. 52074 Aachen Germany Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University Campus-Boulevard 30 52074 Aachen Germany

Product Lifecycle Management (PLM) handles the typical stages of a product's lifespan, and is usually implemented via different methods. This paper addresses the stages product design, process design, process analysis and manufacturing in the product and process development chain of a blade-integrated disk (blisk). Domain ontologies are evolved and incorporated, as well as used with Uniform Resource Identifiers (URI) to implement a comprehensive PLM in the Internet of Production. An architecture based on the Resource Description Framework (RDF) that offers both ingestion and utilization of valuable information along the blisk lifecycle, and therefore enables PLM for all involved participants, is presented.

关键词： Product Lifecycle Management (PLM) Internet of Things (IoT) Computer Aided Manufacturing (CAM) Ontology Semantic Web Technologies

来源：评论

学校读者我要写书评

暂无评论

AI-enhanced Identification, Inspection and Sorting for Reverse Logistics in Remanufacturing 28

AI-enhanced Identification, Inspection and Sorting for Rever...

引用

28th CIRP Conference on Life Cycle Engineering, LCE 2021

作者： Schlüter, Marian Lickert, Hannah Schweitzer, Katharina Bilge, Pinar Briese, Clemens Dietrich, Franz Krüger, Jörg Fraunhofer Ipk Institute for Production Systems and Design Technology Pascalstr. 8-9 Berlin10587 Germany Technische Universität Berlin Institute for Machine Tools and Factory Management Pascalstr. 8-9 Berlin10587 Germany Acatech-Deutsche Akademie der Technikwissenschaften Karolinenplatz 4 München80333 Germany

In a circular economy for remanufacturing, after each life cycle used products are returned to a remanufacturer for identification, inspection, sorting and reprocessing. Shortcomings and requirements of the remanufacturing market are identified through expert interviews and process analysis. A concept is proposed to enable an improved identification and a more objective inspection by enhancing the working environment and processes of sorting stations. Digitization and machine learning are applied on business data, using machine vision as well as sensor and actor skills of the worker. With an experimental case study on visual object recognition a positive impact on identification and thus sorting could be demonstrated. © 2021 Elsevier B.V.. All rights reserved.

关键词： Computer vision

来源：评论

学校读者我要写书评

暂无评论

Development of a machining strategy for diamond slide burnishing burnishing tools made of polycrystalline diamond (PCD) 20

Development of a machining strategy for diamond slide burnis...

引用

20th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2020

作者： Uhlmann, E. Polte, M. Polte, J. Kuche, Y. Wendorf, S. Siebel, D. Fraunhofer Institute for Production Systems and Design Technology IPK Germany Institute for Machine Tools Factory Management IWF Technische Universität Berlin Germany Baublies AG Renningen Germany

ISBN: (纸本)9780995775176

High demands on product quality force companies to reduce production costs. Due to the growing international competition, optical surfaces for tool and mould making need to be produced economically. These surfaces are commonly produced using ultra-precision cutting. However, the efficiency is limited due to low feed velocities vf, small depth of cut ap and associated long process times tPr. An innovative manufacturing process represents diamond burnishing, which can be carried out directly after the high-precision milling process. For this purpose, super-hard materials made of single crystalline diamond (SCD) are currently used as tool materials. Since the material costs are high and the availability is limited, SCD needs to be substituted. An innovative substitution material is polycrystalline diamond (PCD). Within this paper, a machining strategy for the high-precision production of PCD spheres for diamond slide burnishing tools is presented. The processes grinding, polishing and electrical discharge machining (EDM) were applied. Therefore, the manufacturing costs, the surface roughness, the shape accuracy as well as the concentricity accuracy were analysed. Based on these investigations, an efficient and economical machining strategy for the production of high-precision spherical geometries made of PCD can be provided. First results showed that the prefered machining strategy uses a cross-process chain consisting of grinding and polishing. Thereby, the advantages of both processes with the fast manufacturing of the macro-geometry by the grinding process as well as the high surface qualities, which can be achieved by the polishing process, are combined. Copyright © Proceedings of the 20th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2020. All rights reserved.

关键词： Surface roughness

来源：评论

学校读者我要写书评

暂无评论

A Holonic Control System Approach for Line-less Mobile Assembly System Operations

引用

Procedia CIRP 2022年 107卷 1449-1454页

作者： A.F. Buckhorst M.K.B. do Canto R.J. Rabelo R.H. Schmitt Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University Campus-Boulevard 30 52074 Aachen Germany Department of Automation and Systems Engineering Federal University of Santa Catarina Florianópolis SC Brazil Fraunhofer Institute for Production Technology (IPT) Steinbachstrasse 17 52074 Aachen Germany

The Line-Less Mobile Assembly Systems (LMAS) is a paradigm to maximize responsiveness to market trends by adaptive factory configurations utilizing mobile assembly resources. Such responsive systems are characterized as Holonic Manufacturing Systems (HMS), whose Holonic Control Architectures (HCA) are portrayed as Industry 4.0-enabling approaches. Accordingly, we execute the ANEMONA methodology building the LMAS HCA. The analysis phase results in a use case specification. The design phase results in the architecture concept. The implementation phase results in a ontology, re-using elements from widespread manufacturing ontologies, and in the LMAS HCA. Validation is done by the execution of the desired use case workflow.

关键词： Line-Less Mobile Assembly Systems Holonic Control Architecture Holonic Manufacturing Systems Ontology Flexibility

来源：评论

学校读者我要写书评

暂无评论

Additive manufacturing of a passive, sensor-monitored 16MnCr5 steel gear incorporating a wireless signal transmission system

引用

Procedia CIRP 2022年 107卷 505-510页

作者： M. Binder V. Stapff A. Heinig M. Schmitt C. Seidel G. Reinhart Fraunhofer IGCV (Institute for Casting Composite and Processing Technology) Am Technologiezentrum 10 86159 Augsburg Germany Technical University of Munich Institute for Machine Tools and Industrial Management Boltzmannstr. 15 85748 Garching Germany Munich University of Applied Science Department of Applied Science and Mechatronics Lothstr. 34 80335 Munich Germany Fraunhofer IPMS (Institute for Photonic Microsystems) Maria-Reiche-Str. 2 01109 Dresden Germany

The combination of functions in a single component, efficient use of limited space, comprehensive acquisition of process and sensor data and development of passive, wireless monitoring systems are all at the focus of current research. Additive manufacturing is playing an increasingly important role in these developments, because it acts as an enabler for free-form structures, allows access to the interior of the component through its layer-by-layer build-up, and facilitates the processing of a wide variety of materials. Within this work, the aspects mentioned are jointly addressed by the development of a monitored additively manufactured gear (material: 16MnCr5) that communicates wirelessly. This paper shows how an RFID-antenna can be optimized by simulation, incorporated in the design of a metallic gear, then built up in a single manufacturing process and linked to an in-situ inserted sensor board. The approach is validated by fabrication of a sensor-monitored prototype and verified in respect of its functionality and internal structure.

关键词： additive manufacturing sensor integration RFID-antenna laser-based powder bed fusion smart parts pocess monitoring data acquisition

来源：评论

学校读者我要写书评

暂无评论

Anomaly detection on industrial time series for retaining energy efficiency

引用

Procedia CIRP 2021年 99卷 33-38页

作者： Philipp Theumer Reinhard Zeiser Ludwig Trauner Gunther Reinhart Fraunhofer IGCV Fraunhofer Institute for Casting Composite and Processing Technology IGCV Am Technologiezentrum 10 86159 Augsburg Germany Institute for Machine Tools and Industrial Management (iwb) Technichal University of Munich Boltzmannstr. 15 85748 Garching bei München Germany

Improving upon or even just retaining energy efficiency at industrial plants presents a rising challenge. Energy efficiency is gradually lowered due to equipment wear and operating errors. Energy consumption increases as a result, whereas output remains nearly constant or even decreases. Maintaining energy efficiency can be achieved by continuously monitoring power consumption and taking measures accordingly. However, due to the amount of collected data in factories, employees require support in the detection of anomalies. Therefore, this paper proposes a method which is able to detect inefficiencies on univariate time series based on historical data. This enables suitable measures to be taken in order to maintain energy efficiency without the need of additional expert knowledge.

关键词： Energy efficiency machine learning Anomaly detection

来源：评论

学校读者我要写书评

暂无评论

Identification of a novel architecture for production planning and control in consideration of biomimetic algorithms

引用

Procedia CIRP 2021年 99卷 674-679页

作者： Philipp Theumer Darius Sultani Gunther Reinhart Fraunhofer IGCV Fraunhofer Institute for Casting Composite and Processing Technology IGCV Am Technologiezentrum 10 86159 Augsburg Germany Institute for Machine Tools and Industrial Management (iwb) Technical University of Munich Boltzmannstr. 15 85748 Garching bei München Germany

Despite great progress in the academic study of production planning and control (PPC), current PPC systems still fail to fully meet industry’s needs. The approach presented here aims at a more functional and user-friendly PPC by conceptualising a novel idea that leverages the potentials of biomimetic algorithms. The proposed architecture consists of four core modules: order release module, digital shadow, event detection and processing, and decision-making module. Their interactions provide the functionality of the system while emphasising the workers’ key role in the socio-technical PPC system. Requirements for the implementation of the architecture as well as starting points for future research are identified along with the concept.

关键词： Production planning Control Biomimetic algorithms

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：