检索结果-内蒙古大学图书馆

Smart Battery Cell Housings through Additive Manufacturing – Potentials and Challenges

Procedia CIRP 2024年 130卷 15-20页

作者： Thomas Bareth Maja Lehmann Georg Schlick Christian Seidel Fraunhofer IGCV (Fraunhofer Institute for Casting Composite and Processing Technology IGCV) 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

To meet the high requirements and the increasing demand for battery storage systems in the future, attributes such as performance, safety, and lifetime must be improved. One approach for gaining more knowledge about the behavior of battery cells and facilitating those improvements, is the addition of sensors on battery cell level. Sensors enable condition monitoring of physical parameters such as temperatures and cell expansions through volume changes, which can be beneficial especially during early development stages for new cell designs. In this paper, existing research on adding different types of sensors to battery cells is summarized. Based on these findings, a novel perspective for adding sensors is presented, whereby sensors are integrated directly into the cell housing using the layer-by-layer technology additive manufacturing. This approach allows the encapsulation of the sensor in the solid housing material and prevents contact with the chemically aggressive electrolyte or other environmental influences. Furthermore, sensor integration in the housing of battery cells does not affect the cell chemistry, which improves the transfer from product development to serial use, potentially without sensor, compared to existing approaches. From this perspective, the potentials and challenges of implementing smart battery cell housings through additive manufacturing are described and the conceptual framework for future investigations is outlined.

关键词： sensor integration metal additive manufacturing powder bed fusion of metal using laser beam PBF-LB/M laser beam melting

来源：评论

学校读者我要写书评

暂无评论

Conception of a data model for a digital twin for context-specific work instructions

引用

Procedia CIRP 2023年 118卷 312-317页

作者： Leo Nuy Judith Rotering Jonas Rachner Raphael Kiesel Robert H. Schmitt Laboratory for Machine Tools and Production Management (WZL) of RWTH Aachen University Campus-Boulevard 30 52074 Aachen Germany Fraunhofer Institute for Production Technology IPT Steinbachstraße 17 52074 Aachen Germany

In the increasingly volatile manufacturing environment, there is an ever-growing number of static, paper-based technical instructions that are created at great expense and lack actuality and informational value. The need for instructions ranges from product development, manufacturing, assembly, use, maintenance and repair to disposal and recycling. Development trends such as augmented reality and the networking of production through the Industrial Internet of Things enable adaptive and context-specific technical instructions. As a solution approach, a concept for a digital twin is presented, validated, and discussed, based on which such instructions can be created ad-hoc and automatically.

关键词： Digital twin work instructions data model production context-specific adaptive

来源：评论

学校读者我要写书评

暂无评论

Concept for the Portfolio Management of Industrial Solution Providers in machinery and Plant Engineering

引用

Procedia CIRP 2023年 119卷 1152-1157页

作者： Michael Riesener Maximilian Kuhn Carsten Boβmann Günther Schuh Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University Campus-Boulevard 30 52074 Aachen Germany Fraunhofer Institute for Production Technology IPT Steinbachstraβe 17 52074 Aachen Germany

Technical differentiation of products is becoming increasingly difficult for companies in the sector of machinery and plant engineering. As a result, companies are increasingly focusing on fulfilling individual customer benefits, which is leading to greater integration of services and software applications into their portfolios. This change is mostly accompanied by a shift from a transactional business model to selling individual value propositions. For this transformation into an industrial solution provider, it is necessary for the portfolio management of the companies to be adapted to the new conditions, as portfolio management has so far focused either on physical products or on services and software. Thus, this paper presents a concept for the portfolio management of industrial solution providers in machinery and plant engineering to enable an integrated view on all elements of the portfolio and to realize individual value propositions. For this purpose, the implications of the transformation on portfolio management and the resulting solutions are characterized. Subsequently, a procedure for the identification of criteria for establishing the portfolio as well as determining options for realizing the demanded solutions from the portfolio is elaborated.

关键词： Portfolio Management Solution Provider Servitization

来源：评论

学校读者我要写书评

暂无评论

Methodology for agile and iterative ontology development for toolmaking

引用

Procedia CIRP 2023年 120卷 529-534页

作者： Sebastian Weber Tammo Dannen Lars Stauder Sebastian Barth Thomas Bergs Laboratory for Machine Tools and Production Engineering (WZL) RWTH Aachen University Campus-Boulevard 30 52074 Aachen Germany Fraunhofer Institute for Production Technology IPT Steinbachstraße 17 52074 Aachen Germany

Complex manufacturing processes and the absence of repeat effects characterize the toolmaking industry. German-speaking toolmaking companies are increasingly faced with the challenge of having to reach the limits of what is technically feasible and are confronted with an erosion of know-how, induced by demographic change. This applies in particular to know-how-intensive areas such as design, CAM-programming and work preparation. There is currently no comprehensive system support in these areas and the knowledge required for planning activities is often only available in the form of implicit technical and empirical knowledge. However, the use of heterogeneous manufacturing technologies requires a profound understanding of technology along the entire value chain. As a result of the very high semantic expressiveness of ontologies, they enable the representation of the most complex data models with logical relationships that go beyond hierarchical subdivision of content. This paper presents a novel agile methodology for the development of domain-specific ontologies in the environment of toolmaking. The methodology makes it possible to integrate the implicitly existing technical and experiential knowledge of employees at an early stage in the modelling process. In particular, the developed methodology extends conventional methods by the identified deficits in terms of knowledge acquisition, iteration and agility, as well as a separate consideration of the life cycle along the ontology of the use phase, taking into account agile methods from requirements engineering. Compliance with various guidelines and requirements is mandatory, such as the formulation of competence questions and the use of a standardised specification document. The iterative approach also ensures the needs-based integration of the characteristics of toolmaking. Furthermore, the methodology enables an early integration of IT structure and user interface for the needs-based design and use of the domain-

关键词： Semantic technology ontology toolmaking digital twin knowledge retrieval methodology

来源：评论

学校读者我要写书评

暂无评论

Suitability of CAD-based Disassembly Sequence Plans for Flexible Remanufacturing

引用

Procedia CIRP 2023年 120卷 738-743页

作者： Sören Münker Amon Göppert Robert H. Schmitt Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University Campus-Boulevard 30 52074 Aachen Germany Fraunhofer Institute for Production Technology IPT Steinbachstraße 17 52074 Aachen Germany

When products reach the end-of-first-life (EoFL), often recovery of valuable components is ignored because of unprofitable disassembly processes. Extracting the wanted component is a highly manual try-and-error process of disassembling multiple components. The creation of dis- and reassembly plans (e.g. for workers or robots) based on CAD files is currently too labour extensive and individually dependent on the EoFL state. Several studies exist for the automatic generation of assembly plans by CAD files with collision-based approaches. However, whether these approaches are suitable for industrial remanufacturing planning has not been discovered. This research compares the suitability of an AND/OR graph (AOG) and a precedence graph (PG) approach on ten exemplary examples. The suitability is measured with graph-based and visual feasibility checks as well as performance measures. The AOG approach is more promising than the PG approach because it considers the flexible formation of subassemblies and thus, better flexibility for scheduling in mixed-model disassembly lines. The results contribute to automatically deriving disassembly and reassembly plans for lot size one and saving labour-extensive high-wage planning effort. Overall, the resulting quality of assembly plans is highly dependent on the CAD model quality. Only two of the ten models resulted in suitable assembly plans. A preliminary CAD quality control during the design phase is needed to improve the applicability of the examined approaches.

关键词： AND/OR graph Computer-aided Design Disassembly Sequence Planning Assembly Sequence Planning

来源：评论

学校读者我要写书评

暂无评论

Simulation-based optimization of product integrations in line-less assembly systems based on digital twins

引用

Procedia CIRP 2023年 120卷 523-528页

作者： Jonas Rachner Fabiano Junior Maia Manschein Amon Göppert Robert H. Schmitt Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University Campus-Boulevard 30 52074 Aachen Germany Fraunhofer Institute for Production Technology IPT Steinbachstraße 17 52074 Aachen Germany

Line-less assembly systems enable increased resilience against uncertain events such as frequent integration of new product variants, material unavailability, personnel shortages and station failures. This can be achieved through the resolution of a general takt time, redundant workstations and flexible precedence graphs. Benefits arise in particular for use cases with a high number of product variants, parallel assembly of various products, and frequent integration of new products and product variants. This work presents a service-based framework for decision-support for product integrations in line-less assembly systems to meet these challenges. Based on a standardized data model serving as a basis for the digital twin, simulation models for system configurations are created automatically to reduce manual planning effort. The approach of simulation-based optimization is used to find feasible scenarios with least reconfiguration effort. Within the simulation, stochastic influences such as station failures and reactive scheduling decisions can be considered. The developed framework is verified by implementing all modules and a specific optimization model for the automated generation of scenarios after integrating a new product into the line-less assembly system. It can be shown, that recommended actions for adding, removing, or reconfiguring workstations are generated to support a production planner.

关键词： Line-less assembly Digital Twin Product integration Optimization Simulation

来源：评论

学校读者我要写书评

暂无评论

Design for Circularity – Identification of Fields of Action for Ecodesign for the Circular Economy

引用

Procedia CIRP 2023年 116卷 137-142页

作者： Michael Riesener Maximilian Kuhn Frederike Hellwig Johanna Ays Günther Schuh Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University Campus-Boulevard 30 52062 Aachen Germany Fraunhofer Institute for Production Technology IPT Steinbachstraße 17 52074 Aachen Germany

The prevailing production and consumption patterns mostly follow a linear logic: produce, consume and dispose. This orientation of the economic system is highly resource-intensive and exceeds planetary boundaries. In order to decouple the economic growth from resource consumption circular economy is an important enabler by creating and closing resource loops. The goal of a circular economy is the sustainable return of resources into the value chain. Thereby, the design of the products plays a decisive role. Ecodesign is a systematic design approach for products in order to reduce environmental impacts over the entire life cycle by defining design principles. Therefore, ecodesign has the potential to allow the implementation of a circular economy by identifying design principles that enable critical resources to be preserved in cycles. For this reason, a framework with nine fields of action for the realization of circular economy by ecodesign was derived. The fields of action are based on the circular economy strategies "Closing the Loop" and "Slowing the Loop" as well as the product lifecycle phases addressed by ecodesign “production”, “use” and “recycling”. Practical use cases deal with the impact of the various design principles at the material, component and product levels of analysis.

关键词： circular economy ecodesign circularity sustainability reuse

来源：评论

学校读者我要写书评

暂无评论

Bio-based insulation materials and model predictive control of active cooling systems in machine tools

引用

Procedia CIRP 2023年 120卷 910-915页

作者： Daniel Reibert Alexander Steinert Daniel Zontar Stephan Neus Christian Brecher Fraunhofer Institute for Production Technology IPT Steinbachstraße 17 52072 Aachen Germany Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University Steinbachstraße 19 52072 Aachen Germany

The adoption of biological principles and materials plays a decisive role in the conversion to sustainable production technologies. Measures for the biological transformation of a machine tool were implemented following the example of warm-blooded animal, which automatically control their core temperature and, depending on their habitat, possess an insulating layer of fat. In this work, thermal insulation measures were implemented on machine tools using renewable materials and their effects were evaluated. Insulation materials of petrochemical origin such as polystyrene (Styrofoam) were replaced by alternatives made of mycelium with comparable heat insulating properties. On the lower machine bed, a slowdown of the cooling rate was observed after application of insulation materials at external temperature drops. The insulation between the machine bed and the control cabinet was also found to reduce tool centre point (TCP) displacement. This cost-efficient measure reduces the error during the process and the effort required to correct the linear axes and to heat and cool the machine. To homogenize the temporal and spatial temperature profile of machine tools, a control system was developed to compensate for thermally induced errors by means of adaptive active cooling. Therefore, a model predictive control using an embedded artificial intelligence (AI) model to forecast the structural temperature development was implemented. Through a hybrid training database combining experimental and simulative data series, a both flexible and precise determination of the thermal system behaviour could be achieved. On a real production machine, the active cooling system is divided into five individually controllable and adjustable cooling circuits. This approach allows cooling the machine structure according to time and local demand to minimize thermally induced TCP displacement under variable operating conditions. This paper serves to define and evaluate possibilities and requiremen

关键词： thermal insulation biobased baterial homoiothermic, model-predictive control, cooling cycle, machine tool, production machine

来源：评论

学校读者我要写书评

暂无评论

Methodology for the Design of Interdisciplinary Modules for Mechatronic Modular Product Platforms

引用

Procedia CIRP 2023年 119卷 675-680页

Advancing globalization and digitization are continuously changing the competitive conditions in the manufacturing industry. Globalization leads to an increasing number of competitors and results in the necessity for a stronger focus on individual customer needs. At the same time, digitization is leading to an expansion of mechanical products with components from the disciplines of electronics and software. This results in mechatronic products whose components generate a high degree of internal variety due to a large number of interdependencies, thus increasing the complexity of product development. By using modular product platforms, the variety of the products offered can be optimized. However, current approaches for developing modular product platforms are mainly designed for mechanical products, so that the consideration of interfaces between components from different disciplines is not taken into account comprehensively in module design. As a result, the consideration of further disciplines becomes necessary in module design in order to be able to optimize the internal and external variety of the products offered. Thus, this paper presents a concept for interdisciplinary module design in mechatronic modular product platforms. For this purpose, the individual components and their interfaces have to be identified and operationalized. Subsequently, the module design is optimized using a cluster algorithm.

关键词： Mechatronics Modular product platform Complexity Management

来源：评论

学校读者我要写书评

暂无评论

A survey on information requirements analysis for failure management and analysis in production

引用

Procedia CIRP 2023年 120卷 916-921页

作者： Sebastian Beckschulte Daniel Buschmann Robin Günther Tobias Schulze Robert H. Schmitt Laboratory for Machine Tools and Production Engineering WZL of RWTH Aachen University Campus-Boulevard 30 52074 Aachen Germany Fraunhofer Institute for Production Technology IPT Steinbachstraße 17 52074 Aachen Germany

Failure management is essential in production environments to prevent disruptions and satisfy customers' expectations of product quality. Of central importance is not only the establishment of standardized failure management processes but also the use of modern analysis methods for the efficient correction of product and process failures. Due to the high complexity of production environments and failure management at the same time, the human factor still plays a central role in detecting, analyzing, and sustainable correcting product and process failures. However, according to a previous empirical study, around 50 % of all information collected in manufacturing companies remains unused. The study also confirms that around 70 % of the companies consulted are not aware of the information required for targeted analyses. To address the information demands of individual parties during the failure management process more effectively, this survey analyzed actual information requirements and determined which analysis methods are used in the production contexts. We conducted a target-group-specific survey on information requirements analysis in failure management, involving employees in managerial and quality management positions at four automotive OEMs. The survey results indicate the information required to initiate and successfully complete failure management processes in production environments. It became clear that the target group for failure analyses are primarily employees in managerial and quality management positions, rather than on the shop floor. The theoretical approach, which is still a state-of-the-art approach in the automotive industry, envisages a divergent procedure. At the same time, it is shown that despite the enormous developments in the field of data analytics in recent years, the initial analysis approach is still based on descriptive approaches, especially in failure management.

关键词： Failure Analysis Failure Management Information Requirements Analysis Original Equipment Manufacturer (OEM) Production

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：