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检索条件"丛书名=Lecture Notes in Mechanical Engineering"

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Outbound Movements in a Temperature-Controlled Warehouse 32nd

Outbound Movements in a Temperature-Controlled Warehouse

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Oliveira, Ana Lopes, Cristina Polytech Porto ISCAP Porto Portugal Polytech Porto ISCAP CEOS PP Porto Portugal

ISBN: (纸本)9783031381645;9783031381652

The temperature-controlled supply chain in Portugal is on a par with the most developed cold logistics markets. With a growing and increasingly demanding market dynamics, it is essential that companies in the sector adopt strategies aimed at increasing the efficiency of their operations, promoting an increase in the level of service and a decrease in their operating costs. The need to decrease operational costs should not have any impact on quality, and it is expected that the focus will be on the continuous improvement of internal logistics operations. A study of the outgoing movements of products from a temperature-controlled warehouse of a logistics and transport services company was developed. An integer linear programming model was built and applied, in order to minimize the costs of the logistics operator with the operation of picking and storage. It was possible to obtain savings of about 30.9% compared to the initial scenario.

关键词： Cold Chain Logistics Warehouse Operations Mixed Integer Linear Programming Model

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Degradation-Based Design for Disassembly Assessment Using Network Centrality Metrics 32nd

Degradation-Based Design for Disassembly Assessment Using Ne...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Alrufaifi, Header M. Prioli, Joao Paulo Jacomini Rickli, Jeremy L. Wasit Univ Kut Iraq Wayne State Univ 4815 Fourth St Detroit MI 48202 USA

ISBN: (纸本)9783031382406;9783031382413

Assemblies in their life span need repairs, updates, or dismantling at End-of-Use, and accessing critical components during the disassembly process is essential to remanufacturing efficacy. Design for Disassembly (DfD) methods seek to increase component accessibility and disassembly efficiency by improving the design structure. Methods such as directed networks and AND/OR graphs map component disassembly relationships using nodes and edges. During use life, assembly component accessibility may change due to wear which, consequently, changes component disassembly relationships. This paper explores graph theory and social network measures to predict changes in disassembly relationships during use phase in the design phase. Centrality measures are employed to study the key parallels, disparities, and opportunities to characterize changes in component disassembly relationships due to component degradation. As an initial study on a CAD assembly, the Betweenness and Degree of Centrality metrics demonstrated measurable impact of component wear on disassembly relationships.

关键词： Design for Disassembly Disassembly Network Centrality Metrics Collision Test

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Proactive Resource Maintenance in Product-as-a-Service Business Models: A Constraints Programming Based Approach for MFP Offerings Prototyping 8th

Proactive Resource Maintenance in Product-as-a-Service Busin...

引用

8th International Scientific-Technical Conference (MANUFACTURING)

作者： Szwarc, Eryk Golinska-Dawson, Paulina Bocewicz, Grzegorz Banaszak, Zbigniew Koszalin Univ Technol Koszalin Poland Poznan Univ Tech Poznan Poland

ISBN: (纸本)9783031564468;9783031564444

This paper delves into Product-as-a-Service (PaaS) business models, with a primary focus on proactively managing strategies designed to ensure the requisite service level availability for Multi-Function Printer (MFP) offerings. Within this framework, we introduce an all-encompassing system that combines predictive analytics, automated resource allocation, and adaptable service scaling to address potential disruptions and enhance the optimization of service delivery. The core issue addressed in this research falls within the realm of resource allocation problems, specifically concentrating on formulating a strategy for designing lease offers that adhere to predefined risk thresholds related to potential failure to provided resources. Through a case study and the outcomes of computer experiments, we illustrate the efficacy of our approach, grounded in constraints programming, in elevating PaaS availability while efficiently utilizing resources. These findings hold considerable value for consistently delivering reliable services in the ever-evolving digital landscape.

关键词： Proactive Maintenance Product-as-a-Service Constraint Satisfaction Problem MFP

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On the Development of a Compliant Mechanism for Displacement Amplification Produced by Selective Laser Sintering 32nd

On the Development of a Compliant Mechanism for Displacement...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Bove, Alessandro Calignano, Flaviana Perrone, Matteo Iuliano, Luca Politecn Torino Integrated Addit Mfg Ctr IAM Dept Management & Prod Engn DIGEP Corso Duca Abruzzi24 I-10129 Turin Italy

ISBN: (纸本)9783031382406;9783031382413

Selective laser sintering is one of the most established additive manufacturing technologies for prototyping and part production with polymeric materials. High-complexity geometries and topology-optimized structures can be obtained for the fabrication of flexible single-piece parts, that do not need mechanical joints, particularly useful in piezoelectric applications. The fabrication of a compliant mechanism for the amplification and inversion of the displacement input vector has been performed in this study. A genetic algorithm has been implemented to generate the geometry, and after a re-design process, the amplification performance of the real part was compared to finite element analysis values. The complete design and realization process leads to a decrease from 50.00 to 10.25 in amplification factor, showing that too restrictive conditions in the case study definition resulted in a global increase in the structure stiffness.

关键词： Compliant Mechanism Additive Manufacturing Topology Optimization Genetic Algorithm

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A Numerical Study of Relaxation Phenomena in Microfluidic Reactive-Diffusive Systems 14th

A Numerical Study of Relaxation Phenomena in Microfluidic Re...

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14th International Conference on Computational Heat and Mass Transfer (ICCHMT)

作者： Ramos, J., I Univ Malaga Escuela Ingn Ind Malaga 29071 Spain

ISBN: (纸本)9783031672408;9783031672415

A method of lines technique that employs second-order accurate finite differences for the spatial derivatives is presented and used to determine the solution of one-dimensional reactive-diffusive systems in one-dimensional moving domains. The time discretization is based on linearized trapezoidal procedure that results in linear algebraic equations for the nodal values of the dependent variables and their first-order time derivatives. It is shown that the initial conditions play a paramount role in determining the evolution of the reaction region. For ignition sources located near the moving boundary, the region zone is located near this boundary and exhibits only a reaction front, whereas two reaction fronts are observed for ignition sources located away from the boundaries. The thickness and locations of the reaction zones are found to increase as both the amplitude and the frequency of the boundary motion are increased.

关键词： relaxation phenomena hyperbolic equations reaction-diffusion equations moving domains

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Developing Domeless, Circular Vibratory Finishing for Aerospace Applications 3rd

Developing Domeless, Circular Vibratory Finishing for Aerosp...

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3rd International Conference on Advanced Surface Enhancement (INCASE)

作者： Ho, Jeremy Weng Keong Tan, Kai Liang Yeo, Swee Hock Nanyang Technol Univ 50 Nanyang Ave Singapore 639798 Singapore ASTAR Adv Remfg & Technol Ctr ARTC 3 CleanTech Loop01-01 CleanTech Two Singapore 637143 Singapore

ISBN: (纸本)9789819986422;9789819986439

This paper proposed a vibrofinisher with a unique design-domeless, non-elevating and circular bowl vibrofinisher to be used for the aerospace industry. Compared to conventional circular dome vibrofinishers, this new setup could be more effective for material removal and surface roughness improvement than current industrial practices because of its better accessibility to annular geometries. There was limited literature to support this statement. In this paper, a model of a cuboid-body vibration system was proposed and a numerical analysis of this design with reference to past papers of standard design was conducted. The theoretical analysis showed a high potential for faster material removal rate due to an increase of 80.5% in the excitation force and excitation moment of up to 144.6%. Both displacement and rotational angle increased by 68% and 47% respectively, which suggests a higher amplitude. Using the theoretical results, the law of abrasive law and a roughness model was used to substantiate the effectiveness of the domeless bowl as a potential replacement to both the trough and dome bowl.

关键词： Mass finishing Vibratory finishing Aerospace

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Machine History Based Data Learning in CNC Machining 1

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33rd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Kim, S. G. Im, C. S. Lee, Y. S. Song, Y. H. Kim, D. W. EDIM Inc 67 Yusang Ro Jeonju 54852 South Korea Korea Elect Technol Inst 71 Changi Daero Chang Won 51394 South Korea Jeonbuk Natl Univ Dept Ind & Informat Syst Engn Jeonju 54896 South Korea

ISBN: (数字)9783031744853

ISBN: (纸本)9783031744846;9783031744853

With the recent development of the machine tool industry, there is an increasing trend of research to collect real-time cutting physics data in CNC cutting and control the CNC. Cutting physics data is the information collected by various sensors such as current, acceleration, voltage, and torque sensors, which indirectly measure the cutting load. This cutting physics data is used for tool condition diagnosis, cutting condition control, and as a key evaluation indicator for predictive maintenance of the spindle. However, in cutting processes, cutting physics data is less useful due to various factors such as machine, workpiece, tool, cutting conditions, and coolant. For more precise machining condition diagnosis or control, a data learning process using the collected cutting physics data is required. In this study, we present amethod for storing machining history data that synchronises CNC data and cutting physics data, and data learning using the data. Data learning methods based on machining history data include (1) optimising NC data to improve productivity by controlling the feed rate, (2) learning data separated by tool unit to manage the life of individual tools or diagnose the degree of wear, and (3) generating reference control curves for real-time feed rate control during machining. Such data learning is particularly effective in the case of mass-produced products and is essential for the development of a digital twin system for CNC machining.

关键词： computer numerical control (CNC) machining machining history data data learning advanced adaptive feed control

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Surface Enhancements from Peening Effect on Inconel 718 Fabricated by Direct Energy Deposition 3rd

Surface Enhancements from Peening Effect on Inconel 718 Fabr...

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3rd International Conference on Advanced Surface Enhancement (INCASE)

作者： Tham, Nataniel Yong Syn Hao, Zhang ASTAR Adv Remfg & Technol Ctr ARTC 3 Cleantech Loop01-01 CleanTech Two Singapore 637143 Singapore Nanyang Technol Univ Sch Mech & Aerosp Engn 50 Nanyang Ave Singapore 639798 Singapore

ISBN: (纸本)9789819986422;9789819986439

Direct energy deposition Inconel 718 is increasingly explored and used for various industrial applications due to its near net shape and ability to build complex geometries. For post-processing, hammer peening process is a well-established surface finishing step to enhance the compressive stress of the metal, reducing and preventing cracks. Increasingly, laser has been explored for post-processing additive manufactured metal as an in-situ heat treatment process to relieve tensile stresses formed during the process. In this paper, an investigation into the effects of hammer peening in conjunction with laser is performed. Microstructural analysis, hardness values and tribological properties will be used to observe these effects. It was found that hammer peening increased the hardness of Inconel 718, and when used in tandem with laser, the hardness decreased, albeit higher than the non-post processed sample. Lastly, there is a disconnect between the correlation of higher hardness values with lower wear rate, as the lowest hardness value sample has the lowest wear rate in this study, and that hammer peening itself did not reduce the wear rate of direct energy deposited Inconel 718.

关键词： Direct energy deposition Inconel 718 Laser Hammer peening

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A Brief Review of Injection-Mould Materials Hybrid Manufacturing Processes 32nd

A Brief Review of Injection-Mould Materials Hybrid Manufactu...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Nogueira, F. R. Pedroso, A. F. V. Sousa, Vitor F. C. Sebbe, N. P. V. Sales-Contini, R. C. M. Barbosa, M. L. S. Polytech Porto ISEP R Dr Antonio Bernardino Almeida P-4249015 Porto Portugal Technol Coll Sao Jose Campos Ctr Paula Souza Ave Cesare Mansueto Giulio Lattes Prof Jessen Vidal 1350 Distrito Eugenio Melo BR-12247014 Sao Jose Dos Campos SP Brazil

ISBN: (纸本)9783031382406;9783031382413

Injection moulds play a vital role in manufacturing plastic and light alloy's metallic parts. However, these moulds face a significant obstacle in wear and tear, including the formation of cracks, due to the high temperatures and pressures present during the production process. In this paper, hybrid manufacturing processes will be summarised in a brief review, and how each of them influences the surface of the injection moulds will be discussed. To facilitate researchers' comprehension of the subject matter, the selected timeline ranges from 2018 to 2023. Having 24 references as a limiting factor, each hybrid process is documented by two or three outstanding reviews or research papers. The primary search terms employed to gather information were "AM", "Copper-Beryllium alloys", "Heat-Treated Steels", "Hybrid processes", "Invar-36", "MAF", "TAM", "Tool-Wear". Their combination enabled to find information about the evolution of injection-mould materials and hybrid machining technologies. Despite advancements in various techniques, some methods still have not been fully utilised or explored. Although it has been established that conventional processes have their benefits, it has also been discovered that specific non-traditional methods possess notable advantages.

关键词： AM Copper-Beryllium alloys Heat-Treated Steels Hybrid processes Invar-36 MAF TAM Tool-Wear

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Experimental Investigation of Cutting Parameters Influence on Surface Integrity Response During Trimming Operation of Hybrid Composite CGFRP 10th

Experimental Investigation of Cutting Parameters Influence o...

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10th International Conference on Design and Modeling of mechanical Systems (CMSM)

作者： Stambouli, Sirine Allegue, Lamis Schrab, Benoit Collaine, Anne Tourlonias, Michel Ben Khalifa, Ated Univ Haute Alsace ENSISA LPMT Mulhouse France Univ Monastir ENIM LGM Monastir Tunisia

ISBN: (纸本)9783031650062;9783031650079

This study aims to investigate the trimming operation of carbon/glass/epoxy hybrid composites. We investigate the influence of the cutting parameters, more specifically the radial engagement and the stacking configuration chosen for the laminated composites, on the surface quality obtained. a surface roughness meter was used to obtain the linear roughness parameters.

关键词： Hybrid composite CGFRP trimming Surface Integrity Response surface roughness

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