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Wyświetlanie 1-15 z 81
Tytuł:
High-Strength Aluminium Alloys and Their Use in Foundry Industry of Nickel Superalloys
Autorzy:
Pysz, S.
Maj, M.
Czekaj, E.
Powiązania:
https://bibliotekanauki.pl/articles/383248.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminium alloys
foundry industry
nickel superalloys
stopy aluminium
przemysł odlewniczy
nadstopy
Opis:
Of great importance in the selection of materials for cast strctures is keeping a proper balance between the mechanical and plastic properties, while preserving the relevant casting properties. This study has been devoted to an analysis of the choice and application of highstrength aluminium-based alloys maintaining sufficient level of casting properties. The high level of tensile strength (Rm > 500 MPa) matched with satisfactory elongation (A > 3%) is important because materials of this type are used for cast parts operating in the aerospace, automotive, and military industries. These beneficial relationships between the high tensile strength and toughness are relatively easy to obtain in the Al-Zn-Mg-Cu alloys subjected to plastic forming and proper heat treatment. In gravity cast products, on the other hand, whether poured into sand moulds or metal moulds (dies), obtaining this favourable combination of properties poses a number of research problems (mostly resulting from the alloy chemical composition) as well as technical and technological difficulties.
Źródło:
Archives of Foundry Engineering; 2014, 14, 3; 71-76
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Domain WEB Monitoring
Autorzy:
Kluska-Nawarecka, S.
Opaliński, A.
Wilk-Kołodziejczyk, D.
Powiązania:
https://bibliotekanauki.pl/articles/381651.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
web monitoring
foundry industry
data integration
monitoring Internetu
przemysł odlewniczy
integracja danych
Opis:
The last few years have seen a very dynamic development of the Internet worldwide. This is related to the rapid growth of the amount of information stored in its resources. The vast amount of data, impossible to be analyzed by man, is the reason why finding and selecting valuable information from a large number of results returned by search engines has recently become the task very difficult. Another problem is the low quality of the data contained in a large part of the results returned by search engines. This situation poses serious problems if one searches for detailed information related to the specific area of industry or science. In addition, the lack of effective solutions, allowing for continuous monitoring of WEB in terms of the search for emerging information while maintaining the high quality of the returned results, only aggravates this situation. Due to this state of affairs, a solution highly welcome would be a system allowing for continuous monitoring of the WEB and searching for valuable information from the selected Internet resources. This paper describes a concept of such a system along with its initial implementation and application to search for information in the foundry industry. The results of a prototype implementation of this system were presented, and plans for its further development and adaptation to other sectors of the industry were outlined.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2 spec.; 43-46
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Materials Used in the Automotive Industry
Autorzy:
Orłowicz, A. W.
Mróz, M.
Tupaj, M.
Trytek, A.
Powiązania:
https://bibliotekanauki.pl/articles/383174.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
automotive industry
foundry material
casting technique
przemysł motoryzacyjny
materiał odlewniczy
technika odlewnicza
Opis:
Elaborated shapes of many car components are the reason for which the use of casting techniques to fabricate them is a solution wellfounded from the economical point of view. Currently applicable regulatory requirements concerning emissions of exhaust fumes force the carmakers to reduce the overall weight of their products, as this is a basic precondition for reducing fuel consumption. As a result, newly launched car models contain a continuously increasing share of thin-walled castings made of materials which ensure a satisfactory level of service properties. At the same time, developing new technological processes allowing to extend the service life of individual components by means of surface improving becomes more and more important.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2; 75-78
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production scheduling for the furnace - casting line system
Autorzy:
Stawowy, A.
Duda, J.
Powiązania:
https://bibliotekanauki.pl/articles/382138.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information technology
foundry industry
production planning
scheduling
technologia informacyjna
przemysł odlewniczy
planowanie produkcji
harmonogramowanie
Opis:
The problem considered in the paper is motivated by production planning in a foundry equipped with the furnace and casting line, which provides a variety of castings in various grades of cast iron/steel for a large number of customers. The quantity of molten metal does not exceed the capacity of the furnace, the load is a particular type of metal from which the products are made in the automatic casting lines. The goal is to create the order of the melted metal loads to prevent delays in delivery of goods to customers. This problem is generally considered as a lot-sizing and scheduling problem. The paper describes two computational intelligence algorithms for simultaneous grouping and scheduling tasks and presents the results achieved by these algorithms for example test problems.
Źródło:
Archives of Foundry Engineering; 2013, 13, 3; 84-87
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of ingate size on the lost foam casting process
Autorzy:
Pacyniak, T.
Kaczorowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/382861.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
przemysł odlewniczy
tracona piana
powłoka ochronna
foundry engineering
lost foam
EPS models
protective coating
Opis:
The article presents analysis of the influence of ingate size on the Lost Foam casting process. In particular, analysis of simulation tests has been carried out to determine the ingate size influence on the rate of filling of the mould cavity, pressure in the gas gap and size of the gas gap. A specially prepared mathematical model of the process and an original calculation algorithm were used in simulation tests of full-mould casting. The tests have indicated that the increase of the ingate size results in the increase of filling rate and increase of pressure of gases in the gas gap. However, significant influence on mould cavity filling occurs only when the ingate size is less than [...]1 cm2.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2; 171-174
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and mechanical properties of Al-Li alloys as cast
Autorzy:
Augustyn-Pieniążek, J.
Adrian, H.
Rzadkosz, S.
Choroszyński, M.
Powiązania:
https://bibliotekanauki.pl/articles/383253.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Li alloy
aerospace industry
precipitation hardening
stop Al-Li
przemysł lotniczy
utwardzanie wydzieleniowe
Opis:
The high mechanical properties of the Al-Li-X alloys contribute to their increasingly broad application in aeronautics, as an alternative for the aluminium alloys, which have been used so far. The aluminium-lithium alloys have a lower specific gravity, a higher nucleation and crack spread resistance, a higher Young’s module and they characterize in a high crack resistance at lower temperatures. The aim of the research planned in this work was to design an aluminium alloy with a content of lithium and other alloy elements. The research included the creation of a laboratorial melt, the microstructure analysis with the use of light microscopy, the application of X-ray methods to identify the phases existing in the alloy, and the microhardness test.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2; 5-10
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Burrs from Cores Produced by Cold-Box- Amine Method and Possibility of their Elimination in Eurocast Košice s.r.o. Company
Autorzy:
Vaskova, I.
Hrubovcakova, M.
Powiązania:
https://bibliotekanauki.pl/articles/379498.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry industry
moulding mixture
cold -box - amine
casting error
flash gutters
przemysł odlewniczy
wady stopów
Opis:
Foundry industry belongs toward key branch with important meaning for different manufacturing industries. Liquid metal is casting in foundry, which makes cast stock with weight from several grams till several ton [1]. To achieve asking qualities of the product is needed know abundance technological a technical process and progress, but in spite of long – term development foundry industry there occur some question marks, that need answer. Characteristic defect castings of ferrous alloys, which often accompanies the use of amine - Cold box cores are flash gutters. Survey, it was found that 77 % of those surveyed foundries have problems with burrs, 71 % foundries solves this problem (or try to tackle) protivýronkovými ingredients in nuclear and molding compounds , but only 29 % considered their "antivýronkovú" method for successful and favorable.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1 spec.; 115-120
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Pallet Component Geometry on Temperature Gradient During Cooling
Autorzy:
Bajwoluk, A.
Gutowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/379657.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information technology
foundry industry
foundry pallet
temperature gradient
technologia informatyczna
przemysł odlewniczy
paleta
gradient temperatury
Opis:
The paper discusses the impact of the geometry of foundry pallet components on the value of temperature gradient on the wall crosssection during heat treatment. The gradient is one of the most important factors determining the distribution of thermal stresses in these items. Analysis of quantitative simulation was carried out to detect possible effect of the type of connection between pallet walls and thickness of these walls (ribs) on the interior temperature distribution during rapid cooling. The analysis was performed for five basic designs of wall connections used in pallets. Basing on the results obtained, the conclusions were drawn on the best connection between the ribs in foundry pallets.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1; 5-8
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Models and algorithms for production planning and scheduling in foundries - current state and development perspectives
Autorzy:
Stawowy, A.
Duda, J.
Powiązania:
https://bibliotekanauki.pl/articles/382778.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
technologia informatyczna
przemysł odlewniczy
planowanie produkcji
szeregowanie zadań
information technology
foundry industry
production planning
scheduling
Opis:
Mathematical programming, constraint programming and computational intelligence techniques, presented in the literature in the field of operations research and production management, are generally inadequate for planning real-life production process. These methods are in fact dedicated to solving the standard problems such as shop floor scheduling or lot-sizing, or their simple combinations such as scheduling with batching. Whereas many real-world production planning problems require the simultaneous solution of several problems (in addition to task scheduling and lot-sizing, the problems such as cutting, workforce scheduling, packing and transport issues), including the problems that are difficult to structure. The article presents examples and classification of production planning and scheduling systems in the foundry industry described in the literature, and also outlines the possible development directions of models and algorithms used in such systems.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2; 69-74
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Process of Data Acquisition Regarding the Process of Casting from the Internet
Autorzy:
Wilk-Kolodziejczyk, D.
Kluska-Nawarecka, S.
Stefański, Z.
Smolarek, A.
Powiązania:
https://bibliotekanauki.pl/articles/380058.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry industry
casting process
information technology
crawler
przemysł odlewniczy
proces odlewania
technologie informatyczne
roboty indeksujące
Opis:
Access to up-to-date information on technology, innovation, source publications, and the materials and services offered in a particular industry is very important for both industrial plants and departmental research centres. It should be noted that obtaining such information using publicly available search engines such as Google, Yahoo!, Bing, Bindu (mainly used in China) is only apparently easy because, due to their versatility, they deliver results with great redundancy. This leads to the need to analyze large data sets by linguistic methods or "manually", which is very tedious and time consuming. In this situation, it was considered reasonable to undertake studies aimed at acquiring relatively simple IT tools, i.e. crawlers, which allow their users to selectively search for information in a particular problem area, which in this particular case is casting. The intention of this work was to collect and analyze the experimental material that would allow describing the characteristics of the above solutions from the point of view of the range of their application, the quality of the results achieved, and possible limitations and preferences taking into account user needs.
Źródło:
Archives of Foundry Engineering; 2018, 18, 1; 212-216
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Decision Support System in the Domain of Casting Defects Diagnosis
Autorzy:
Wilk-Kołodziejczyk, D.
Rojek, G.
Regulski, K.
Powiązania:
https://bibliotekanauki.pl/articles/947573.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
application of information technology
foundry industry
castings defects
diagnosis
zastosowanie technologii informatycznych
przemysł odlewniczy
wady odlewów
Opis:
This article presents a computer system for the identification of casting defects using the methodology of Case-Based Reasoning. The system is a decision support tool in the diagnosis of defects in castings and is designed for small and medium-sized plants, where it is not possible to take advantage of multi-criteria data. Without access to complete process data, the diagnosis of casting defects requires the use of methods which process the information based on the experience and observations of a technologist responsible for the inspection of ready castings. The problem, known and studied for a long time, was decided to be solved with a computer system using a CBR (Case-Based Reasoning) methodology. The CBR methodology not only allows using expert knowledge accumulated in the implementation phase, but also provides the system with an opportunity to "learn" by collecting new cases solved earlier by this system. The authors present a solution to the system of inference based on the accumulated cases, in which the main principle of operation is searching for similarities between the cases observed and cases stored in the knowledge base.
Źródło:
Archives of Foundry Engineering; 2014, 14, 3; 107-110
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of optical scanning for analysis of casting shape
Wykorzystanie skanowania optycznego do analizy kształtu odlewów
Autorzy:
Wieczorowski, M.
Grzelka, M.
Budzik, G.
Augustyn-Pieniazek, J.
Powiązania:
https://bibliotekanauki.pl/articles/379621.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information technology
foundry industry
quality management
nondestructive testing
technologia informatyczna
przemysł odlewniczy
zarządzanie jakością
badania nieniszczące
Opis:
In the paper the use of optical scanning for inspection of casting shape and its accuracy was described. Optical system applied to digitization of objects determines all dimensions and shape of inspected object. This technology is used in quality control and reverse engineering. System is based on triangulation: sensor head performs projection of different patterns of fringes onto measured object and scanner tracks their distribution with two cameras. Basing on optical transform equations, a processing unit automatically and with remarkable accuracy calculates 3D coordinates for every pixel of camera. Depending on camera resolution the result of such a scan is a cloud of points with up to 5 million points for every image. In the paper examples of applications for castings with different designation was presented.
W artykule opisano wykorzystanie skanowania optycznego do kontroli dokładności wykonania odlewów. System optyczny stosowany do digitalizacji obiektów określa wszystkie wymiary i kształt badanego przedmiotu. Technologia ta wykorzystywana jest w kontroli jakości i w inżynierii odwrotnej. System bazuje na zasadzie triangulacji: głowica sensora dokonuje projekcji różnych układów prążków na obiekt mierzony a skaner obserwuje ich przebieg dwoma kamerami. Opierając się na równaniach transformacji optycznej, jednostka przetwarzająca automatycznie i z dużą dokładnością oblicza współrzędne 3D dla każdego piksela kamery. Zależnie od rozdzielczości kamery, wynikiem takiego skanu jest chmura do 4 milionów punktów dla każdego pojedynczego pomiaru. W artykule pokazano przykładowe zastosowanie skanera optycznego do pomiarów odlewów o różnym przeznaczeniu.
Źródło:
Archives of Foundry Engineering; 2011, 11, 2 spec.; 217-221
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production Scheduling for the One Furnace – Two Casting Lines System
Autorzy:
Basiura, R.
Duda, J.
Stawowy, A.
Powiązania:
https://bibliotekanauki.pl/articles/379848.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information technology
foundry industry
production planning
production scheduling
technologia informatyczna
przemysł odlewniczy
planowanie produkcji
harmonogramowanie produkcji
Opis:
The paper presents a scheduling production problem in foundry equipped with one furnace and two casting lines, which provides a number of different types of castings for a large number of clients. The amount of molten metal may not be greater than the capacity of the furnace and its load is a type of metal, from which the products are manufactured on automated casting lines. The purpose of planning is to create the processing order of metal, to prevent delays in the delivery of the ordered products to the customers. This problem is mixt of lot-sizing problem and scheduling problem on two machines (the lines) running in parallel. The article gives a mathematical model, which formally defines the optimization problem, and his relaxed version which is based on the concept of rolling-horizon planning. The proposed approaches were tested on the sample data.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2 spec.; 3-6
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Stresses in the Wall Connections of Cast Grate Structures
Autorzy:
Bajwoluk, A.
Gutowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/380772.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information technology
foundry industry
cast grates
thermal stresses
technologia informatyczna
przemysł odlewniczy
odlew
paleta
naprężenia cieplne
Opis:
The purpose of this study was to establish a relationship between the type of wall connection used in the cast grates, which are part of the equipment operating in furnaces for heat treatment and thermal-chemical treatment, and stresses generated in these grates during the process of rapid cooling. The places where the grate walls are connected to each other are usually characterized by the thickness larger than the remaining parts of walls. Temperature variations in those places are responsible for the formation of hot spots, and in the hot spots temperature changes much more slowly. The type of wall connection shapes the temperature gradient in the joint cross-section, and hence also the value of thermal stresses generated during cooling. In this study, five different designs of the grates were compared; the difference in them was the type of the designed wall connection. The following design variants were adopted in the studies: X connections with and without holes, T connections with and without technological recesses, and R (ring) connection. Numerical analysis was performed to examine how the distribution of temperature changes in the initial phases of the cooling process. The obtained results served next as a tool in studies of the stress distribution in individual structures. The analysis were carried out by FEM in Midas NFX 2014 software. Based on the results obtained, the conclusions were drawn about the impact of different types of wall connections on the formation of thermal stresses in cast grates.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 11-16
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical Programming for Lot Sizing and Production Scheduling in Foundries
Autorzy:
Duda, J.
Stawowy, A.
Basiura, R.
Powiązania:
https://bibliotekanauki.pl/articles/380801.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
application of information technology
foundry industry
production planning
scheduling
zastosowanie technologii informatycznych
przemysł odlewniczy
planowanie produkcji
Opis:
The problem considered in the paper is motivated by production planning in a foundry equipped with the furnace and casting line, which provides a variety of castings in various grades of cast iron/steel for a large number of customers. The quantity of molten metal does not exceed the capacity of the furnace, the load is a particular type of metal from which the products are made. The goal is to create the order of the melted metal loads to prevent delays in delivery of goods to customers. This problem is generally considered as a lot-sizing and scheduling problem. The paper describes a mathematical programming model that formally defines the optimization problem and its relaxed version that is based on the conception of rolling-horizon planning.
Źródło:
Archives of Foundry Engineering; 2014, 14, 3; 17-20
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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