1,721,107 research outputs found
CAD-based design for welding (DFW) method
No full textThe paper provides a method to integrate Design for Welding (DFW) method with CAD systems. The method is based on three main phases: (i) definition of DFW rules for the development of mechanical products, (ii) link of DFW rules with product geometrical features that are available by the investigation of the 3D model, and (iii) integration with CAD systems to support product design review. A method and a software tool are described including their features to help designers in the product development process. Case study aims to validate the proposed method in the identification of assembly issues early in the product development process. The CAD-based DFW tool is a useful assistant to avoid design problems related to the welding technology
Eco-design teaching initiative within a manufacturing company based on LCA analysis of company product portfolio
Full text linkEco-design is the integration of environmental considerations within product design and development. Eco-design represents an important innovation driver for companies; however, well-known barriers limit the diffusion of this design paradigm in the industrial world. Amongst these, lack of eco-knowledge is correlated to the adopted eco-design teaching methods. Previous experience has highlighted that traditional teaching methods such as university lectures or refresher courses are not an effective means for disseminating eco-design knowledge in the industrial world.In this context, the present paper proposes a novel eco-design teaching method based on a transformative strategy for promoting eco-design and facilitating the learning process.This approach, tested in collaboration with an Italian manufacturing firm, is considered the first attempt to implement a repeatable eco-design teaching approach that can be scaled up in different industrial contexts. Several company departments, including management, marketing and commercial affairs, design and engineering, and a testing laboratory were involved in the training program. Technical results show that company employees were able to autonomously implement re-design solutions and improve the environmental performance of a coffee machine upon completion of the course. The quantitative evaluation of formative outcomes through assessment before and after the course highlights a significant increase in the awareness of personnel and knowledge relating to eco-design. (c) 2019 Elsevier Ltd. All rights reserved
Eco-design guidelines takeaways from the analysis of product repairability and ease of disassembly: A case study for electric ovens
Full text linkOne of the main aspects to increase the useful life of ErP and reduce waste generation is the product repairability. Key factors in assessing the ability to repair a product are the ease of disassembly, and the use of repairability indexes (i.e., eDiM, French repairability index, RSS, etc.). The goal of this paper is to retrieve eco-design guidelines analyzing the product repairability of target components belonging to four different types of electric ovens. The analysis adopts as baseline the report of the Joint Research Centre and the European standard EN 45554. Results provide interesting insights concerning the identification of disassembly issues and the mitigation of these hotspots through eco-design guidelines retrieved by the analysis of repairability
Disassembly and Repairability of Mechatronic Products: Insight for Engineering Design
No full textDesigning mechatronic products requires interdisciplinary skills and as products become more complex, the design of mechatronic systems plays a critical role. To minimize waste production and pollution, a shift toward a circular economy is necessary, with mechatronic products being particularly impacted by such policies. Repairing plays a key part in achieving a circular economy. Through repairability, the product lifespan can be extended, and combined with maintenance the rate of product replacement can be reduced. Within this context, the goal of this paper is to propose a design methodology (based on the EN 45554:2020 standard) for generating and implementing eco-design rules for disassembly and repair. The methodology has four phases, the first one is the identification of target components (those that are more likely to fail during the lifespan). The second phase encompasses the experimental disassembly analysis which can be manual or virtual. The third phase is the assessment of the disassemblability index which includes the analysis of parameters that affect the disassembly phase. The last phase is the implementation of the eco-design methodology for all the components that do not meet the minimum repairability requirements. A case study of electro-mechanical ovens is presented, targeting replaceable components. The results show that the use of this framework and the eco-design actions derived from it are successful in improving the repairability of the product and increasing the disassemblability index (30% on average) through a virtual analysis. A sensitivity analysis has been conducted to study the impact of parameter weight modification. This research contributes to advancing repairability and supporting the circular economy paradigm in mechatronic product design
De-manufacturing Analysis for Product Repairability and Serviceability in Cooking Systems
No full textNew standards (e.g., the EN4555X series) and indices have been issued to include repairability aspects in product design. These indices are very useful in the design phase to characterize the product and to understand the ability of products to be disassembled. The goal of this paper is to address product repairability and ease of disassembly for cooking systems, with a specific focus on induction hobs. A four steps approach was followed encompassing project definition, laboratory tests, disassemblability index calculation, and eco-design actions definition for product improvement. Project definition includes the identification of target components for service/repair purposes, while laboratory test allows retrieval of disassembly data in accordance with EN 45554 standard. The disassemblability index calculation brings to the identification of design criticalities that affect the repairability score providing important insight into the identification of eco-design actions. The implementation of the eco-design actions, when applied in the product development process, will lead to an increment in repairability and serviceability performance for the identified target components
DISASSEMBLY ANALYSIS OF GAS COOKTOPS: TOWARDS ECO-DESIGN RULES FOR PRODUCT REPAIRABILITY
No full textThe ease of disassembly and the application of repairability metrics are important in determining the ability to repair industrial products and goods (e.g., ease of Disassembly Method, Repair Scoring System, French repairability index, etc.). Increasing product repairability is a key aspect to tackle during the product development process aiming at the product lifetime extension and the reduction of industrial waste. The purpose of this work is to find eco-design actions by examining the ability to disassemble key components in different types of gas hobs. After the definition of target components, several disassembly tests were performed following the method proposed by the Joint Research Centre's report (Analysis and development of a scoring system for repair and upgrade of products) and the European standard EN 45554 (General methods for the assessment of the ability to repair, reuse and upgrade energy-related products). The Disassemblability Index of each priority part has been calculated, being able to verify that one of the factors that affect the most is the number of steps needed to remove the component. The outcomes offer interesting insights into the characterization of disassembly issues as well as for the identification of possible eco-design actions making the product repairability efficient and less costly
Life Cycle Impact Assessment of Mechatronic Products: Towards Engineering Eco-Design for Hobs Technologies
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Eco-design of cooking appliances based on food habits and diets
No full textEnergy efficiency standards in the context of cooking appliances are an important strategy to preserve electric energy consumption and to reduce greenhouse gas emissions. Although successful standards and labels have been launched in many countries, the implementation of eco-design directive does have not a unique structure, energy policy and consumers understanding. The aim of this study is to describe the environmental performance of cooking appliances in real use conditions derived by the analysis of food habits and diets in EU countries. The final goal is to link cooking performance and the environmental features (i.e. energy consumptions, emissions) in different cooking conditions. The work is structured in three phases: (i) definition of recipes based on food habits in EU countries, (ii) development of energy consumption tests for each recipe, and (iii) characterization of eco-design actions considering the diet specificity. The outcome of this study provides interesting insights in the development of sustainable products for different markets as well as the definition of dedicated eco-design initiatives
Effect of the surface morphology over the fatigue performance of metallic single lap-shear joints
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