Procedia manufacturing最新文献_第8页

Assessing laser powder bed fusion system geometric errors through artifact-based methods 基于伪影的激光粉末床融合系统几何误差评估方法

Procedia manufacturing Pub Date : 2021-01-01 DOI: 10.1016/j.promfg.2021.06.042

J. Berez , M. Praniewicz , C. Saldana

{"title":"Assessing laser powder bed fusion system geometric errors through artifact-based methods","authors":"J. Berez , M. Praniewicz , C. Saldana","doi":"10.1016/j.promfg.2021.06.042","DOIUrl":"10.1016/j.promfg.2021.06.042","url":null,"abstract":"<div><p>Additive manufacturing (AM) machines have developed more rapidly than standardized frameworks needed for the qualification of their geometric capabilities. While some manufacturer-specific methods exist to test capabilities and perform some calibration tasks, standardization efforts have only recently been undertaken in the form of ISO/ASTM 52902. In this study, the recommended methodology prescribed by the standard was implemented by building geometric artifacts with a laser powder bed fusion (LPBF) system and performing dimensional inspection with a coordinate measurement machine (CMM), amongst other methods. Typical dimensional capabilities of the LPBF system are identified and commentary is made on applying metrology methods, detecting geometric error, and diagnosing base causes in the LPBF system. In doing so, favored metrology practices and measurement analysis methods auxiliary to the standard are proposed. Artifact measurements were used to characterize beam positioning error and beam offset error. Methods for decoupling the effects of error sources are proposed. Difficulties in the inspection of AM components are identified, and the effects of various CMM measurement strategies are evaluated. Insights on the application of the new standard are presented, along with commentary as to its fitness for the LPBF process.</p></div>","PeriodicalId":91947,"journal":{"name":"Procedia manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.promfg.2021.06.042","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54983907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Manufacturing of Stereolithography Enabled Soft Tools for Point of Care Micromixing and Sensing Chambers for Underwater Vehicles 用于水下航行器点微混合和传感室的立体光刻软工具的制造

Procedia manufacturing Pub Date : 2021-01-01 DOI: 10.1016/j.promfg.2021.06.047

Edisson A. Naula , Biali Lima Rodríguez , Luis E. Garza-Castañon , J. Israel Martínez-López

引用次数: 3

A Study of Particle Size Metrics Using Non-Spherical Feedstock for Metal Additive Manufacturing 金属增材制造中非球形原料粒度指标的研究

Procedia manufacturing Pub Date : 2021-01-01 DOI: 10.1016/j.promfg.2021.06.053

Marcus Jackson , Aishwarya Deshpande , Aaron Kim , Frank Pfefferkorn

{"title":"A Study of Particle Size Metrics Using Non-Spherical Feedstock for Metal Additive Manufacturing","authors":"Marcus Jackson , Aishwarya Deshpande , Aaron Kim , Frank Pfefferkorn","doi":"10.1016/j.promfg.2021.06.053","DOIUrl":"10.1016/j.promfg.2021.06.053","url":null,"abstract":"<div><p>The goal of this work was to determine which standard particle size metric derived from optical analysis most closely approximates the sieved weight percent of irregularly shaped powder intended to be used for directed energy deposition. In this investigation, equivalent circle diameter, maximum diameter, minimum diameter, and perimeter were used as metrics to “virtually sieve” the particles in samples of irregularly shaped powder into the following particle size bins: <45 µm, 45 µm – 150 µm, and >150 µm. The percentage in the 45 µm – 150 µm bin were then compared to the weight percent of the powder mechanically sieved into this size range. The absolute difference between the virtually sieved percentage and the mechanically sieved percentage was assessed for 81 samples of mechanically-generated stainless steel 316L powder, all produced under different processing conditions in an oscillation ball mill. This difference was found to be on average, the least with the minimum diameter assessed as an area percentage, followed by the equivalent diameter assessed as an area percentage, and then the maximum diameter assessed as a percentage of the total number of particles ranked third. These findings and the methodology used to obtain them may be used by powder production process engineers and quality assurance personnel to assist in process control as more diverse additive manufacturing feedstocks become utilized.</p></div>","PeriodicalId":91947,"journal":{"name":"Procedia manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.promfg.2021.06.053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54984046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Novel Fatigue Tester for Additively Manufactured Metals 新型增材制造金属疲劳测试仪

Procedia manufacturing Pub Date : 2021-01-01 DOI: 10.1016/j.promfg.2021.06.054

Shyam-Sundar Balasubramanian , Chris Philpott , James Hyder , Mike Corliss , Bruce Tai , Wayne Hung

引用次数: 1

A Layer Image Auditing System Secured by Blockchain 基于区块链的图层图像审计系统

Procedia manufacturing Pub Date : 2021-01-01 DOI: 10.1016/j.promfg.2021.06.059

Jinwoo Song, Young Moon

引用次数: 0

Teaching Manufacturing Processes from an Innovation Perspective 创新视角下的制造过程教学

Procedia manufacturing Pub Date : 2021-01-01 DOI: 10.1016/j.promfg.2021.06.076

Brian K. Paul , Laine Mears , Albert Shih

引用次数: 2

Multi-Material Topology Optimization Using Variable Density Lattice Structures for Additive Manufacturing 增材制造中可变密度点阵结构的多材料拓扑优化

Procedia manufacturing Pub Date : 2021-01-01 DOI: 10.1016/j.promfg.2021.06.089

Vysakh Venugopal , Nathan Hertlein , Sam Anand

{"title":"Multi-Material Topology Optimization Using Variable Density Lattice Structures for Additive Manufacturing","authors":"Vysakh Venugopal , Nathan Hertlein , Sam Anand","doi":"10.1016/j.promfg.2021.06.089","DOIUrl":"10.1016/j.promfg.2021.06.089","url":null,"abstract":"<div><p>Multi-material lattice structures are used in a range of load-bearing applications for multiple conditions including mechanical and thermal loads. Additive manufacturing processes with multi-material capabilities are well suited to manufacture multi-material structures. In this paper, a multi-material topology optimization approach has been presented using variable-density lattice structures where the geometry of the lattice structure is pre-defined. The objective of the proposed topology optimization method is to design lightweight parts with minimized compliance and thermal energy or improve the heat transfer capability. To facilitate that, a novel interpolation scheme based on the stiffness matrices of the lattice structures has been proposed. This interpolation scheme, unlike the traditional Solid Isotropic Material Penalization (SIMP) interpolation, is observed to perform better in terms of approximating the structure’s load-bearing capacity, primarily due to its formulation on the lattice’s stiffness matrices. This cubic Hermite spline-based interpolation scheme makes it amenable for gradient-based optimization methods. A sequential linear programming method has been used to solve the weighted multi-objective optimization model. A Pareto-frontier study has also been carried out to fully characterize the trade-offs between the two objectives – compliance minimization and thermal energy minimization.</p></div>","PeriodicalId":91947,"journal":{"name":"Procedia manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.promfg.2021.06.089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54984486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Digitalization as an enabler of the Circular Economy of electronics 数字化是电子循环经济的推动者

Procedia manufacturing Pub Date : 2021-01-01 DOI: 10.1016/j.promfg.2021.07.010

Laura Talens Peiró , Francesco Baiguera , Andrea Maci , Marco Olivieri , Paola Villa , Marcello Colledani , Xavier Gabarrell i Durany

{"title":"Digitalization as an enabler of the Circular Economy of electronics","authors":"Laura Talens Peiró , Francesco Baiguera , Andrea Maci , Marco Olivieri , Paola Villa , Marcello Colledani , Xavier Gabarrell i Durany","doi":"10.1016/j.promfg.2021.07.010","DOIUrl":"10.1016/j.promfg.2021.07.010","url":null,"abstract":"<div><p>To facilitate the transition from a linear to a circular economy there is a need to develop digital tools that can provide comprehensive and useful data to enhance repair, remanufacturing, reuse, and recycling. This paper explains the typology of information key for such end, it discusses the current limitations and difficulties to implement methods in a digital platform, and a description of already existing digital solutions that will be further improved in the context of the DigiPrime project. A preliminary analysis of the availability and accessibility of information about electronics is required before the definition of a digital tool to support circular economy. First, the paper discusses the need of ‘digitalized’ end ‘standardized’ information of electronics to promote circular strategies. Then, diverse digitalization approaches by several teams of the Digiprime project are detailed. The paper concludes with a description of the next steps needed to align the diverse digitalization approaches and its potential contribution to improve the electronics sector.</p></div>","PeriodicalId":91947,"journal":{"name":"Procedia manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.promfg.2021.07.010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54984786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A digital platform for cross-sector collaborative value networks in the circular economy 循环经济中跨部门协同价值网络的数字平台

Procedia manufacturing Pub Date : 2021-01-01 DOI: 10.1016/j.promfg.2021.07.011

John Soldatos , Nikos Kefalakis , Angela-Maria Despotopoulou , Ulf Bodin , Andrea Musumeci , Antonella Scandura , Carlo Aliprandi , Dena Arabsolgar , Marcello Colledani

{"title":"A digital platform for cross-sector collaborative value networks in the circular economy","authors":"John Soldatos , Nikos Kefalakis , Angela-Maria Despotopoulou , Ulf Bodin , Andrea Musumeci , Antonella Scandura , Carlo Aliprandi , Dena Arabsolgar , Marcello Colledani","doi":"10.1016/j.promfg.2021.07.011","DOIUrl":"10.1016/j.promfg.2021.07.011","url":null,"abstract":"<div><p>In recent years there has been a growing interest in Circular Economy (CE), which promises to reduce waste and improve sustainability. The promise of CE is to change the conventional “take–make–dispose” that causes massive waste flows based on the integration of demanufacturing and remanufacturing processes within value chains. This integration requires breaking the ”silos” of the circular chain to establish new collaborative and sustainable value networks. The paper introduces a novel digital platform for the CE, which is currently under development in the H2020 DigiPrime project. The platform is destined to facilitate seamless and trusted information exchange across circular actors, while offering a range of value-added services that enable manufacturers, remanufactures, recyclers and other actors to gain insights in the status of recycling and waste management processes. The latter facilitates the implementation of zero waste processes, along with the assessment of the performance of the circular chain. The paper introduces the architecture of the digital platform, along with its data modelling, exchange and data traceability mechanisms. It also presents a CE use case used to validate the platform.</p></div>","PeriodicalId":91947,"journal":{"name":"Procedia manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.promfg.2021.07.011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54984801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Global supply chain quality integration strategies and the case of the Boeing 787 Dreamliner development 全球供应链质量整合战略与波音787梦想飞机开发案例

Procedia manufacturing Pub Date : 2021-01-01 DOI: 10.1016/j.promfg.2021.07.014

Roland Schmuck

{"title":"Global supply chain quality integration strategies and the case of the Boeing 787 Dreamliner development","authors":"Roland Schmuck","doi":"10.1016/j.promfg.2021.07.014","DOIUrl":"10.1016/j.promfg.2021.07.014","url":null,"abstract":"<div><p>Managing the quality of global supply chains is critical for the success of global companies. Quality disseminates through the supply chains. Supply chain quality integration facilitates each company to use its main expertise which can lead to higher quality and cost reductions. Digital audits enhance the possibilities to ensure the production quality at the suppliers. A global supply chain quality integration is illustrated through the case of the Boeing 787 Dreamliner development. The development process was a major challenge for Boeing because not only several innovations were introduced in the 787 plane, but the supply chain quality integration reached new levels for the company. The 787-program had process, management, labor, and demand risks. The first 787 plane was delivered three years later than planned and the budget was exceeded by 10 billion USD. To solve the issues, Boeing created the Production Integration Center. It sent engineers and production workers to its suppliers in several countries of the world to smooth the supply chain quality integration. Boeing supported its suppliers with its knowledge. Onsite cameras were used as digital audits. The Production Integration Center intervened when it estimated delays in the shipments. Boeing successfully solved the issues, but they cost the company a lot. Examining this supply chain restructuring case can help supply chain managers to diagnose and overcome issues in supply chain quality integrations.</p></div>","PeriodicalId":91947,"journal":{"name":"Procedia manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.promfg.2021.07.014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54984838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4