Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 7
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

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.

Go to article

Authors and Affiliations

A. Trytek
M. Tupaj
M. Mróz
A.W. Orłowicz
Download PDF Download RIS Download Bibtex

Abstract

In many companies, along with the economic development, the use of integrated management systems is becoming more and more common, which are subject to evolution in terms of, inter alia, offered functions and new user requirements. The main purpose of this paper is to compare selected ERP (Enterprise Resource Planning) systems in the field of production planning and control on the example of the automotive industry. The paper presents the contemporary functioning of the automotive industry against the background of issues related to the integrated management systems used in them. The research part presents the proprietary methodology for the assessment of IT systems used in the automotive industry, which included a user survey. The obtained score allowed to indicate the optimal ERP class system supporting production planning and control.
Go to article

Authors and Affiliations

Robert Sika
1
ORCID: ORCID
Oliwia Wojtala
2
Jakub Hajkowski
1
ORCID: ORCID

  1. Poznan University of Technology, Faculty of Mechanical Engineering, Poland
  2. Poznan, Poland
Download PDF Download RIS Download Bibtex

Abstract

The article presents the most important causes of the unstable connection between cast iron ring inserts and the silumin casting of an engine piston. It is shown that manufacturing defects are mainly related to the alfin processing of inserts in Al-Si alloy (the so-called AS9 alloy). Exceeding the permissible iron content in AS9 alloy causes the crystallization of brittle -Al5FeSi phases. Their unfavorable morphology and large size are the main reasons for the weakening of the diffusion connection between the inserts and the piston, causing an unacceptable proportion of defective products. The study presented in this work was conducted under industrial conditions on a population of 10.000 pistons. Quality control data, production parameters, as well as the micro- and macro-structures of the cast iron inserts, and the interface area between the inserts and the silumin piston, were analyzed. Material and technological solutions have been proposed to reduce the occurrence of casting defects at the insert-piston joint. This includes the introduction of so-called "morphological correctors" of the -Al5FeSi phases, reducing the possibility of gaseous impurities in the AS9 alloy and optimizing the temperature of the alfin alloy.
Go to article

Authors and Affiliations

M. Szucki
1
ORCID: ORCID
J. Piątkowski
2
ORCID: ORCID
M. Czerepak
3

  1. Foundry Institute, Technische Universität Bergakademie Freiberg, Bernhard-von-Cotta-Str. 4,09599 Freiberg, Germany
  2. Department of Material Technologies, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland
  3. Federal-Mogul Gorzyce sp. z o.o., Odlewników 52, 39-432 Gorzyce, Poland
Download PDF Download RIS Download Bibtex

Abstract

DP600 steels are characterized by a dual phase ferritic-martensitic microstructure, to which they owe their exceptionally favourable combination of high strength and good ductility. One of the production methods for this grade of steel is the hot rolling process. Despite the fact that these steels have been produced on an industrial scale for almost 40 years, they are still being studied intensively, with new research on the formation of their microstructure and properties published every year. This article focuses on the characteristics of DP600 steel produced on a hot rolling mill for applications in automotive industry. The article presents the results of mechanical properties tests and microstructure analysis of DP600 steel obtained in an industrial hot rolling process. The general characteristic of DP600 steel presented in this article, is supplemented with statistical analysis of correlations between chemical composition, selected process parameters and mechanical properties of hot rolled DP600 steel.
Go to article

Authors and Affiliations

Tomasz Kaźmierski
1
ORCID: ORCID
Janusz Krawczyk
2
ORCID: ORCID
Łukasz Frocisz
2
ORCID: ORCID

  1. ArcelorMitt al Poland S.A. Unit in Krakow, Tadeusza Sendzimira 1 Street, 31-752 Krakow, Poland; AGH Doctoral School al. Mickiewicza 30, 30-059 Krakow, Poland
  2. AGH University of Krakow, Faculty of Metals Engineering and Computer Science, Al. Mickiewicza 30, 30-059 Krakow, Poland
Download PDF Download RIS Download Bibtex

Abstract

The paper deals with the possibilities of using alkali silicate based inorganic binders for automotive industry aluminium castings production. In recent years, inorganic binders are coming back to the foreground and their manufacturers are developing new processes, which are starting to progressively supersede organic binder systems. Paper describes known knowledge about classic alkali silicate binders with focus on hardening processes and on improving their technological properties. Trends from the area of development and the use new alkali silicate based inorganic binders are also shortly described. As part of the experimental work, specific methods of producing samples were developed, with the help of which properties such as disintegration were subsequently evaluated by measuring abrasion and residual strengths. Characteristics such as residual compressive strength or shear strength at different thermal loads were also evaluated. When comparing the laboratory results with the results of de-coring in real conditions, a high degree of correlation was achieved, which makes it possible to determine the optimal recipe/procedure for the production of geometrically complex cores.
Go to article

Bibliography

[1] Jelínek, P. (1996). Foundry molding mixtures Part II, Binder systems of molding mixtures. Ostrava.
[2] Lewandowski, J.L. (1997) Plastics for casting molds. Kraków: WYD AKAPIT.
[3] Bolibruchova, D., Kuris, M., Matejka, M. & Kasinska, J. (2022). Study of the influence of zirconium, titanium and strontium on the properties and microstructure of AlSi7Mg0.3Cu0.5 alloy. Materials. 15(10). 3709, 1-20. DOI: 10.3390/ma15103709.
[4] Köhler, E., Klimesch, C., Bechtle, S. & Stanchev, S. (2010). Cylinder head production with gravity die casting. MTZ Worldwide. 71, 38-41. DOI: 10.1007/BF03227043. https://doi.org/10.1007/BF03227043.
[5] Polzin, H. (2014.) Inorganic Binders for mould and core production in the foundry. (1st. ed.) Berlin: Schiele und Schön.
[6] Antoš, P., Burian, A. (2002). Water glass - production, structure, properties and uses. Silchem
[7] Izdebska-Szanda, I., Palma, A., Angrecki, M. & Żmudzińska, M. (2013). Environmentally friendly mould technology. Archives of Foundry Engineering. 13(3), 37-42. DOI: 10.2478/afe-2013-0055.
[8] Stechman, M., Różycka, D. & Baliński, A. (2003). Modification of aqueous sodium silicate solutions with morphoactive agents. Polish Journal of Chemical Technology. 5(3), 47-50. ISSN (1509-8117).
[9] Jelínek, P. & Škuta, R. (2003). Modified sodium silicates – a new alternative for inorganic foundry binders. Materials Enginering. 10(3), 283.
[10] Mashifana, T. & Sithole, T. (2020). Recovery of silicon dioxide from waste foundry sand and alkaline activation of desilicated foundry sand. Journal of Sustainable Metallurgy. 6, 700-714. DOI: 10.1007/s40831-020-00303-5.
[11] Vasková, I. & Bobok, L. (2002). Some knowledge of the water glass modification by the phosphate compounds. Acta Metallurgica Slovaca. 8(2), 161-167.
[12] Major-Gabryś, K., Dobosz, St.M., Jelínek, P., Jakubski, J. & Beňo, J. (2014). The measurement of high-temperature expansion as the standard of estimation the knock-out properties of moulding sands with hydrated sodium silicate. Archives of Metallurgy and Materials. 59(2), 739-742. DOI: 10.2478/amm-2014-0123.
[13] Obzina, T., Merta, V., Folta, M., Bradáč, J., Beňo, J. Novohradská, N., et al. (2021). Technological and quality aspects of the use of innovative inorganic binders in the production of castings. Metals. 11(11), 1779, 1-13. DOI: 10.3390/met11111779.
[14] Izdebska-Szanda, I., Baliński, A., Angrecki, M. & Palma, A. (2014). The effect of nanostructure modification of the silicate binder on its binding characteristics and functional properties. Archives of Metallurgy and Materials. 59(3), 1033-1036. DOI: 10.2478/amm-2014-0173.
[15] Major-Gabryś, K., Dobosz, St.M., Jakubski, J. (2010). Self-hardened moulding sand with hydrated sodium silicate and liquid ester hardeners. In K. Świątkowski (Eds.), Polish Metallurgy in 2006-2010. (328-335). Krakow: Committee of Metallurgy of the Polish Academy of Science.
[16] Izdebska-Szanda, I. & Baliński, A. (2011). New generation of ecological silicate binders. Procedia Engineering. 10, 887-893. DOI: 10.1016/j.proeng.2011.04.146.
[17] Baliński, A. (2009). About structure of hydrated sodium silicate as a binder of moulding sands. Krakow: Foundry Research Institute.
[18] Izdebska-Szanda, I. (2012). Moulding sand with silicate binder characterized by beneficial technological and ecological properties. M.Sc. dissertation, Foundry Research Institute, Poland.
[19] Izdebska-Szanda, I., Stefański, Z., Pezraski, F. & Szolc, M. (2009). Effect of additives promoting the formation of lustrous carbon on the knocking out properties of foundry sands with new inorganic binders. Archives of Foundry Engineering. 9(1), 17 – 20.
[20] Izdebska-Szanda, I., Szanda, M. & Matuszewski, S. (2011). Technological and ecological studies of moulding sands with new inorganic binders for casting of non-ferrous metal alloys. Archives of Foundry Engineering. 11(1), 43-48. ISSN (1897-3310).
[21] Zaretskiy, L. (2016). Modified silicate binders new developments and applications. International Journal of Metalcasting. 10(1), 88-99. DOI: 10.1007/s40962-015-0005-3.
[22] Josan, A., Pinca‐Bretotean, C. & Ratiuc, S. (2021). Management of the regeneration process of the moulding mixtures in order to reduce the costs of the foundry type industrial enterprises. Materials Today: Proceedings. 45, 4161-4165. DOI: 10.1016/j.matpr.2020.12.034
[23] Davis, J.R. (1998). Metals Handbook. Desk Edition (2nd ed.) Boca Raton:CRC Press.
Go to article

Authors and Affiliations

M. Bruna
1
ORCID: ORCID
I. Vasková
2
ORCID: ORCID
M. Medňanský
1
ORCID: ORCID
P. Delimanová
2
ORCID: ORCID

  1. Faculty of Mechanical Engineering, Department of Technological Engineering, University of Zilina, Univerzitná 8215/1, 010 26 Žilina, Slovakia
  2. Institute Of Metallurgy, Faculty of Materials, Metallurgy and Recycling, Technical University of Košice, Letná 9, 042 00 Košice, Slovakia
Download PDF Download RIS Download Bibtex

Abstract

The automotive industry is characterized by a high degree of uncertainty. Companies are facing the challenge of producing different systems simultaneously. Additionally, the global quantity of electric vehicles is also expected to increase significantly. This results in the following capability to remain competitive: Effective and efficient adaptions of production systems to model variations and volume increases. While flexible production is identified as the most promising concept, defining the actual flexibility level of included production resources is essential for its proper realization. A literature review on existing flexibility assessment approaches revealed their emphasis on high-level enablers and limited practical applicability in the automotive industry. In contrast, focusing the assessment on single workstations supports the selection of appropriate production resources. Therefore, a simple and structured standard procedure for a production resource flexibility assessment was developed. This theoretical construct was subsequently complemented with practical insights through its application on two real-life case studies within one automotive engineering company. Summarizing and discussing the findings in combination with a conclusion completed this paper.
Go to article

Authors and Affiliations

Oliver Moerth-Teo
1
Gernot Schlögl
2
Muaaz Abdul-Hadi
3
Markus Brillinger
3
Martin Weinzerl
4
Christian Ramsauer
1

  1. Institue of Innovation and Industrial Management, Graz University of Technology, Austria
  2. Institue of Production Engineering, Graz University of Technology, Austria
  3. Pro2Future GmbH, Austria
  4. AVL List GmbH, Austria
Download PDF Download RIS Download Bibtex

Abstract

The automotive industry is a highly competitive sector. Manufacturers must effectively control highly complex production processes in order to fulfil all customer orders for customized cars on time, on budget and to the required quality. In this paper, the authors focus on improving the flow time of asynchronous automotive assembly lines by reducing the buffer time. A simulation-search heuristic procedure was developed and confirmed in a 5 workstations asynchronous assembly line installed in an automotive company. The proposed procedure identifies optimal performing buffer profiles for each storage level which guarantees lowest flow time while keeping the same throughput level. Experiments results show that our new algorithm significantly outperforms existing results, especially for large scale problems.
Go to article

Authors and Affiliations

Salah Eddine Ayoub El Ahmadi
1
Laila El Abbadi
1

  1. Engineering Sciences Laboratory, National School of Applied Sciences, Ibn Tofail University, Kenitra, Morocco

This page uses 'cookies'. Learn more