scholarly journals Standardisation efforts of ISO/TC 261 “Additive Manufacturing”: Reports from 14th and 15th Plenary Meeting

2020 ◽  
Vol 5 (4) ◽  
pp. 317-318
Author(s):  
Eujin Pei
Keyword(s):  
Additive Manufacturing ◽  
Health And Safety ◽  
Quality Parameters ◽  
Test Procedures ◽  
Plenary Meeting ◽  
Software Applications ◽  
Process Chains ◽  
Working Groups

AbstractThe main objective of ISO/TC 261 is to standardise the processes of Additive Manufacturing, the process chains (Data, Materials, Processes, Hard- and Software, Applications), test procedures, quality parameters, supply agreements, environment, health and safety, fundamentals and vocabularies. The technical contents for those standards are developed in different Working Groups of ISO/TC 261. This section provides readers with news regarding standardisation efforts of ISO/TC 261.

scholarly journals Standardisation efforts of ISO/TC 261 “Additive Manufacturing”: 17th plenary meeting of ISO/TC 261 “Additive Manufacturing”

2021 ◽  
Author(s):  
Eujin Pei
Keyword(s):  
Additive Manufacturing ◽  
Health And Safety ◽  
Quality Parameters ◽  
Test Procedures ◽  
Plenary Meeting ◽  
Software Applications ◽  
Process Chains

AbstractThe main objective of ISO/TC 261 is to standardise the processes of additive manufacturing, the process chains (data, materials, processes, hard- and software, applications), test procedures, quality parameters, supply agreements, environment, health and safety, fundamentals and vocabularies. This section provides readers with news regarding standardisation efforts of ISO/TC 261.

scholarly journals Improve inspection process in tire manufacturing by using computer simulation

2018 ◽  
Vol 192 ◽  
pp. 01048
Author(s):  
Sathitthep Sangthong ◽  
Pattara Woraphu ◽  
Kanokbhorn Arayikanon
Keyword(s):  
Working Condition ◽  
Production Capacity ◽  
Plant Production ◽  
Quality Inspection ◽  
Test Procedures ◽  
Average Production ◽  
Engineering And Technology ◽  
Inspection Process ◽  
Working Groups

The purity of this research was to study the feasibility of improving the quality inspection in the manufacturing of tire by focusing on the utilization process. The current plant production is continuous and there are four working groups which can be divided into 3 shifts with 24 hours produced a day (Average production capacity is 350 days per year). Improved quality inspection processes will inevitably result in unnecessary production stops. Therefore, the researchers have proposed a feasibility study on how to improve the quality of the test procedures using engineering and technology techniques. These create models that have the same functionality as the current working condition. The result was found that Model 2 could reduce unnecessary processes and also four workers per shift if the worker's wage was calculated. This model shows a cost reduction of approximately 1.68 million baht per year, as well as utilization process

scholarly journals “Technical interoperability”: ISO/TC46/SC4 annual meeting

2020 ◽  
pp. 183-192
Author(s):  
I. V. Timoshenko
Keyword(s):  
Annual Meeting ◽  
Information Science ◽  
International Standards ◽  
Document Management ◽  
Science Standards ◽  
Plenary Meeting ◽  
Wide Range ◽  
Working Groups ◽  
Key Events ◽  
First Time

The author reviews the key events and projects held and discussed within the framework of the ISO/TC46/SC4 plenary meeting. The meeting was held as part of the 47th annual ISO/TC46 meeting week held in London 2020. The subject scope of ISO/TC46 covers a wide range of issues related to document management, indexing and abstracting services, and information science. Due to COVID19 pandemic, all the meetings were moved to online. The committee’s annual meeting was held in this format for the first time. The subcommittees and working groups discussed issues related to international standardization and ongoing projects in this area. The author discusses in detail the presentations by the participants in the plenary meeting ISO/TC46/SC4, held on May 12, 2020. The ISO/TC46/SC4 subcommittee conducts a number of projects to ensure the technical compatibility of library information systems with information science standards in related fields, which are developed by other ISO Technical Committees, as well as other authoritative organizations, i.e. DCMI and W3C. At ISO/TC46/SC4 plenary meeting, the working groups’ chairs reported on the state of the art in corresponding projects of international standards, plans for future were discussed. Subcommittee’s internal activities as well as issues of cooperation with other organizations were also covered.

scholarly journals In-vitro study of quality control parameters of three different brands of azithromycin tablets

2017 ◽  
Vol 6 (7) ◽  
pp. 1572
Author(s):  
Rashmi Singh ◽  
Monika Saxena ◽  
Deeksha Sahay ◽  
Sujata Singh
Keyword(s):  
In Vitro Study ◽  
Quality Parameters ◽  
Pharmaceutical Companies ◽  
Dissolution Profile ◽  
Test Procedures ◽  
Disintegration Time ◽  
Weight Variation ◽  
Quality Control Parameters ◽  
Standard Value

Background: Azithromycin, being a very important antibiotic, is manufactured by different pharmaceutical companies and available in numerous brands. Therefore, it requires a quantitative evaluation and assessment of tablets chemical, physical and bioavailability properties.Methods: The physicochemical quality pararametrs like weight variation, size, hardness, friability, disintegration time and dissolution profile of three brands of azithromycin tablets were assessed by performing various test procedures according to established methods.Results: The different brands of tablets showed very slight variations in weight and size, not exceeding more than 5% of standard value. Similarly, hardness of all the brands was less than 5kg/f and friability ranged from 0.2 to 0.5%. All the brands tested disintegrated in <6 minutes and all the brands released >75% of the active ingredient within 45 minutes.Conclusions: All the physiochemical quality parameters of three brands of azithromycin tablets were found to be within the pharmacopeial specifications therefore all the brands were pharmaceutically and chemically equivalent and can be freely interchanged.

scholarly journals Hydrogeology and Hydrogeochemistry of the Lauria Mountains Northern Sector Groundwater Resources (Basilicata, Italy)

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
Filomena Canora ◽  
Giovanna Rizzo ◽  
Simona Panariello ◽  
Francesco Sdao
Keyword(s):  
Stable Isotopes ◽  
Major Ions ◽  
Groundwater Resources ◽  
Quality Parameters ◽  
Standard Test ◽  
Chemical Compositions ◽  
Test Procedures ◽  
Groundwater Samples ◽  
Chemical Content ◽  
Northern Sector

In this study, the hydrogeological characterization of the northern sector of the Lauria Mounts carbonate hydrostructure (southern Apennines, Basilicata region) has been carried out and the hydrochemical properties of different collected groundwater samples have been characterized. Several normal springs drain the hydrostructure, some of them characterized by high annual mean discharges. Groundwater samples were collected from different springs; many parameters such as pH, electrical conductivity, and total dissolved solids have been measured, and major (cations and anions) elements and stable isotopes have been analysed following standard test procedures. Other chemical characteristics were derived from the analysed quality parameters. The results elucidate that the main hydrogeochemical processes control the chemical content and assess the quality of the groundwater within the hydrostructure. The analyses highlight that the chemical compositions of groundwater are strongly influenced by the lithology, especially limestones and dolomitic limestones; they explain and confirm the hydrogeological setting of the system. The groundwater system displays light different geochemical signatures. The processes contributing to the concentrations of major ions depend primarily on carbonate dissolution. The analysis, in all studied groundwater samples, shows that the facies groundwater type is Ca–HCO3, bicarbonate is the dominant anion, and calcium is the dominant cation with appreciable magnesium concentrations. To identify the aquifer’s recharge areas, the environmental stable isotopes oxygen and hydrogen, deuterium, and 18O were analysed. The unaltered δ18O and δD signatures for the groundwater of the major springs allows identifying the recharge area of these emergencies at elevations ranging from 900 m to 1000 m (a.s.l.), pointing out the presence of deeper flow regime feeding of these springs. The groundwater sample isotopic characteristics of D and 18O suggest that most of the groundwater is recharged directly by infiltration in a high-permeability medium.

Additive Manufacturing of Hot Gas Path Parts and Engine Validation in a Heavy Duty GT

2016 ◽  
Author(s):  
Julius Schurb ◽  
Matthias Hoebel ◽  
Hartmut Haehnle ◽  
Harald Kissel ◽  
Laura Bogdanic ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
High Performance ◽  
Turbine Blades ◽  
Combustion Process ◽  
Heavy Duty ◽  
Hot Gas ◽  
Process Chains ◽  
Manufacturing Technologies ◽  
Cooling Air

Additive manufacturing and in particular Selective Laser Melting (SLM) are manufacturing technologies that can become a game changer for the production of future high performance hot gas path parts. SLM radically changes the design process giving unprecedented freedom of design and enabling a step change in part performance. Benefits are manifold, such as reduced cooling air consumption through more efficient cooling schemes, reduced emissions through better mixing in the combustion process and reduced cost through integrated part design. GE is already making use of SLM for its gas turbine components based on sound experience for new part production and reconditioning. The paper focuses on: a) Generic advantages of rapid manufacturing and design considerations for hot gas path parts b) Qualification of processes and additive manufacturing of engine ready parts c) SLM material considerations and properties validation d) Installation and validation in a heavy duty GT Additive Manufacturing (AM) of hot gas path components differs significantly from known process chains. All elements of this novel manufacturing route had to be established and validated. This starts with the selection of the powder alloy used for the SLM production and the determination of essential static and cyclic material properties. SLM specific design features and built-in functionality allow to simplify part assembly and to shortcut manufacturing steps. In addition, the post-SLM machining steps for engine ready parts will be described. As SLM is a novel manufacturing route, complementary quality tools are required to ensure part integrity. Powerful nondestructive methods, like 3D scanning and X-ray computer tomography have been used for that purpose. GE’s engine validation of SLM made parts in a heavy duty GT was done with selected hot gas path components in a rainbow arrangement including turbine blades with SLM tip caps. Although SLM has major differences to conventional manufacturing the various challenges from design to engine ready parts have been successfully mastered. This has been confirmed after the completion of the test campaign in 2015. All disassembled SLM components were found in excellent condition. Subsequent assessments of the SLM parts including metallurgical investigations have confirmed the good part condition.

scholarly journals New process chains involving additive manufacturing and metal forming – a chance for saving energy?

2017 ◽  
Vol 207 ◽  
pp. 1176-1181 ◽  
Author(s):  
Margarita D. Bambach ◽  
Markus Bambach ◽  
Alexander Sviridov ◽  
Sabine Weiss
Keyword(s):  
Additive Manufacturing ◽  
Metal Forming ◽  
Saving Energy ◽  
Process Chains ◽  
New Process
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