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1
Zrobotyzowane stanowisko do mycia, suszenia i sprawdzania szczelności form odlewniczych
Kurc Krzysztof, Burghardt Andrzej, Muszyńska Magdalena, Obal Paweł, Szybicki Dariusz
Prace Naukowe Politechniki Warszawskiej. Elektronika
|
2022
|
z. 197, t. 2
151-160
PL
Praca dotyczy procesu budowy zrobotyzowanego stanowiska do mycia, suszenia i sprawdzania szczelności form odlewniczych aparatów kierujących lotniczej turbiny niskiego ciśnienia. Proces przygotowania precyzyjnych wielowarstwowych ceramicznych form odlewniczych jest etapem żmudnym i czasochłonnym. Formy ceramiczne dotychczas czyszczono i myto w sposób ręczny i odkładano do magazynu w celu samoistnego wysuszenia. Przeprowadzono robotyzację tych dwóch podstawowych procesów oraz dodano etap sprawdzania szczelności form. Na poszczególne podzespoły i stację zrobotyzowanego zgłoszono wynalazki do Urzędu Patentowego a zaprojektowaną i zbudowaną stację wdrożono w firmie CPP (Consolodated Precision Products Poland sp. z. o.o.).
EN
The work concerns the process of building a robotic stand for washing, drying and checking the tightness of casting molds of the steering apparatus of a low pressure aviation turbine. The process of preparing precise multilayer ceramic casting molds is a tedious and time consuming stage. Until now, ceramic molds have been cleaned and washed manually and placed in a warehouse for self drying. Robotization of these two basic proceeded was carried out and the stage of checking the tightness of the molds was added. The inventions were submitted to the Patent Office for individual components and the robotic station, and the designed and built station was implemented at CPP (Consolodated Precision Products Poland sp. z. o.o.).
2
Projektowanie oraz budowa zrobotyzowanego stanowiska do obróbki skrawaniem elementów odlewanych
Szybicki Dariusz, Burghardt Andrzej, Kurc Krzysztof, Muszyńska Magdalena
Prace Naukowe Politechniki Warszawskiej. Elektronika
|
2022
|
z. 197, t. 2
161-170
PL
Artykuł dotyczy charakterystyki procesu projektowania, programowania oraz budowy zrobotyzowanego stanowiska do procesu obróbki skrawaniem elementów odlewanych. W artykule omówiono sposoby projektowania, opracowany proces adaptacji narzędzia oraz wykonane symulacje. Scharakteryzowany został proces programowania z wykorzystaniem podejścia hybrydowego. Pokazano proces budowy oraz testów wykonanych na stanowisku laboratoryjnym oraz w warunkach przemysłowych.
EN
The article concerns the characteristics of the design, programming and construction of a robotic station for the machining of cast elements. The article discusses the design methods, the developed tool adaptation process and the simulations performed. The programming process was characterized by a hybrid approach. The construction process and tests performed on a laboratory stand and in industrial conditions are shown.
3
Content available Arc welding renovation of permanent steel molds
Šutka Jozef, Koňar R., Moravec J., Petričko L.
Archives of Foundry Engineering
|
2021
|
Vol. 21, iss. 2
35--40
EN
The paper deals with the possibility of the renovation of permanent steel molds for casting using electric arc welding technology. When casting liquid metal into permanent steel molds, there is chemical-thermo-mechanical wear of the surface of the mold cavity and the inlet system, which causes a deterioration of the surface quality and dimensional accuracy of the casting. For this reason, it is necessary to renovate the steel mold after a certain casting interval - mold life. In this case, the technology of manual electric arc welding with a coated electrode was used for the renovation. The welding renovation aims to increase the service life of the mold using carbide hardfacing welds, which after welding achieve high mechanical properties of the renovated mold parts. Two types of hardfacing coated electrodes were used for welding, namely the OK Weartrode 55HD electrode and the OK Weartrode 50T electrode. Macroscopic analysis, tribological tests as well as the measurement of the hardness of the welded layers were performed to evaluate the quality and the friction coefficients of the additional materials used. The properties of hardfacing welds were compared with the properties of the basic material of the high-alloy steel mold. The main advantage is in addition to increasing the durability and longevity of the mold, also reducing the cost of mold renovation compared to other renovation technologies.
4
Content available Reconstruction of the Casting Technology in the Bronze Age on the Basis of Investigations and Visualisation of Casting Moulds
Garbacz-Klempka A., Kwak Z., Żak P. L., Szucki M., Ścibior D., Stolarczyk T., Nowak K.
Archives of Foundry Engineering
|
2017
|
Vol. 17, iss. 3
184--190
EN
During excavation of the cremation cemetery of urnfield culture in Legnica at Spokojna Street (Lower Silesia, Poland), dated to 1100-700 BC, the largest - so far in Poland – a collection of casting moulds from the Bronze Age was discovered: three moulds for axes casting made out of stone and five moulds for casting sickles, razors, spearhead and chisels, made out of clay. This archaeological find constituted fittings of foundrymen’s graves. In order to perform the complete analysis of moulds in respect of their application in the Bronze Age casting technology analytical methods, as well as, computer aided methods of technological processes were used. Macroscopic investigations were performed and the X-ray fluorescence spectrometry method was used to analyse the chemical composition and metal elements content in mould cavities. Moulds were subjected to three-dimensional scanning and due to the reverse engineering the geometry of castings produced in these moulds were obtained. The gathered data was used to perform design and research works by means of the MAGMA5 software. Various variants of the pouring process and alloys solidification in these archaeological moulds were simulated. The obtained results were utilised in the interpretation of the Bronze Age casting production in stone and clay moulds, with regard to their quality and possibility of casting defects occurrence being the result of these moulds construction. The reverse engineering, modelling and computer simulation allowed the analysis of moulds and castings. Investigations of casting moulds together with their digitalisation and reconstruction of casting technology, confirm the high advancement degree of production processes in the Bronze Age.
5
Content available Improvement of Artistic Cast Production System
Władysiak R., Pacyniak T., Trzoska J.
Archives of Foundry Engineering
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2017
|
Vol. 17, iss. 3
143--148
EN
The paper presents the technology and organization of the artistic cast production. On the basis of the actual cast production system, the manufacturing process was shown, in particular sand–piece moulding, which is a very important process and a time-consuming part of the entire manufacture of the casts. The current state of the production process as well as the organization of the work and production technology were analysed with the use of methods and techniques of production improvement, the Lean Manufacturing concept and computer systems. The results of the analysis and studies were shown with use of schemes and graphs of the layout of the production resources, a flow chart of the production process, value stream mapping, and a costs table for the production and modernization of the moulding stage. The work has shown that there are possibilities to improve the artistic cast production system. This improvement leads to increased productivity, lower production costs of artistic casts and increased competitiveness of the foundry.
6
Content available Ceramic Moulds for Precision Casting in the Bronze Age and Computer Reconstruction of the Casts
Garbacz-Klempka A., Kozana J., Piekoś M., Kwak Z., Długosz P., Stolarczyk T.
Archives of Foundry Engineering
|
2015
|
Vol. 15, iss. 1 spec.
21--26
EN
The casting workshop in Grzybiany, in Lower Silesia (SW Poland) is a valuable source of knowledge on the development of casting techniques in the 7 – 6 centuries BC. Abundant evidence found on the archaeological site points to cast manufacturing by means of precision casting in ceramic moulds (lost-wax molding). The workshop is the biggest collection of moulds for bracelet, necklace and other smaller decorative artefacts in Poland. The aim of the work is to conduct the research of the moulds and casts with the view of performing a computer reconstruction of the casting moulds from the Bronze and Early Iron Age, based on the Grzybiany finds. As part of the work, both the microscopic structure and defectoscopic analyses of the casting moulds were performed. Chemical composition of the casts was tested using the X-ray fluorescence spectroscopy method. Based on these results and using computer modelling methods, a geometric visualisation was performed, which is the bases for preparing the visualisation of the process of pouring liquid metal into the moulds, reconstructing both the technology and the alloys used.
7
Content available Influence of the Mould Cooling Process on the Quality and Properties of Aluminium Alloy
Weiss V., Svobodova J.
Production Engineering Archives
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2014
|
Vol. 5, No. 4
36--41
EN
The article deals with the effect on the quality of casting moulds (metal, bentonite mixture) on the structure of the alloy AlZn5,5MgCu and selected mechanical properties of the alloy. The effect of foundry moulds can significantly affect formation and range of crystal segregation and the subsequent thermal process of homogenization which has an influence on the final quality of the alloy. The research focuses on the formation and range of crystal segregation and its removal with homogenization annealing, in which the observed influence of individual factors influencing the diffusion process and quality of the aluminium alloy.
8
Content available remote Ultrasonic testing of the hardening kinetics of epoxy resins used for foundry patterns
Zych J.
Archives of Foundry Engineering
|
2010
|
Vol. 10, iss. 3
21--24
EN
The study presents the results of investigations on the hardening kinetics of modern pattern materials which, among others, include also epoxy resins. Tests were carried out using a new ultrasonic technique developed by the author of the present study. On the example of the EPO 999 resin, the run of the hardening process at temperatures of 10, 20 and 30°C was shown. This is the temperature range applied during production of foundry patterns. The time of the preliminary hardening amounted to 800 min at a temperature of 10°C , and to only 180 min at a temperature of 30°C . Using ultrasonic technique, the effect of temperature on the modulus of elasticity Ed of the examined resin was determined. The temperature has been observed to exert a linear effect on the value of the modulus Ed. When the resin pattern is preheated in the range of temperatures from 20 to 50°C , the value of the modulus Ed decreases by 30%. The drop in the value of the modulus Ed, as well as the resin hardness decreasing from 18 to 9,0 HB at the increasing temperature reduce the applicability of this material for patterns operating at high temperatures (moulding sands).
9
Content available remote Continuous temperature measurements on the pouring stand for casting moulds
Leśniewski W., Karwiński A.
Archives of Foundry Engineering
|
2008
|
Vol. 8, iss. 1
75-80
EN
The results of temperature measurements of liquid iron alloys obtained by means of the pyrometer, PDR-1800 series, are presented in the paper. The measurements were performed in conditions determined by the kind of a pouring device. The results obtained for bottom-tap ladles were supplemented by laboratory measurements. These results allow explaining significant differences in the results of temperature measurements performed in pouring ladles by means of the pyrometric method and immersible thermocouple, which - in turn - improves assessment of metal thermal parameters in pouring devices.
10
Wybrane aspekty konstrukcji układów wlewowych w formach piaskowych
Borowiecki B.
Prace Naukowe Politechniki Szczecińskiej. Instytut Inżynierii Materiałowej
|
2005
|
Nr 576 (19)
1-162
EN
The monograph concerns the chosen aspects of the construction of the gating systems designed for ferrous metals in sand moulds. On the ground of the results of fluidity investigations: rod test and spiral test, there has been presented the method of determination the rheological parameters of liquid metals alloys. On the ground of the fluidity rod test it has been defined the curves of fluxion of metals alloys about different overheating degrees. The simulating investigations of pouring process of the perpendicular channels in the rod test has confirmed the thesis about the growth of boundary layer about the same parameters in channels about different diameters. It has been proved, that the parameters of metal boundary layer (supplementary rheological parameter and shape factor of boundary layer), appointed in definite conditions, can be applied to calculation of the thickness of metal boundary layer in the channels of gating system. There are two boundary layers: rheological and solidified. The thickness of the rheological boundary layer in channel of gating systems depends on: the value of supplementary rheological parameter appointed on the ground of the fluidity tests, the metallostatic pressure and length of the channel. The thickness of solidified boundary layer depends on the time and the thermophysical properties of the sand mould material. It has been affirmed, that in the first several seconds of pouring the sand moulds with the liquid ferrous metals, there is a violent fall of the flow ratio value in the channels of the gating systems. In this work there has been an attempt to prove that this phenomenon had been caused by the violent growth of the gas pressure and the large over-cooling of the metal boundary layer in the channels of gating system. On the basis of the hydraulic model of the heat flow, the method of determination heat dissipation coefficient in the sand moulds channels has been proposed. This coefficient allows to determinate the required overheating value for any element of gating system about definite dimensions. The simulation-experimental investigations of the ferrous metals flow through the furcated gating system permitted on ascertainment of occurrence the phenomenon of reflection the planes of metal stream in horizontal distributor channel and on explanation its influence on the process of filling niches of sand mould. On the ground of the analyses of the investigations results there have been presented the new proposals of calculation methods of metal flow efficiency coefficient through elements of gating systems.
11
Content available remote Development of pressure die casting and permanent-mould casting technologies
Ragan E.
Archiwum Odlewnictwa
|
2004
|
R. 4, nr 11/2
137--140
EN
Contribution deals with main directions of pressure die casting and permanent - mould casting. Research of mentioned technologies are made. Results of research are transferred into industrial practice. They are research of metal properties in interval of crystallization especially viscosity of liquid alloys, research of filtration, simulation of die filling and liquid metals solidifying. research of pressure die casting special methods, die materials, research of cooling system of permanent - moulds, thermograph y and radioscopy of permanent - moulds.
12
Content available remote Analiza dynamiki przenośnika form odlewniczych
Sochacki T., Grabski J.
Archiwum Odlewnictwa
|
2004
|
R. 4, nr 12
283--290
PL
W referacie przedstawione są obliczenia przenośnika taśmowego form odlewniczych wykonane przy użyciu programu working model. Numeryczne rozwiązanie równań dynamiki umożliwia określenie obciążeń w elementach urządzenia.
EN
Dynamic analysis of discrete model of moulding form conveyor is presented. Numerical analysis of the model was carried out using Working Model system. Steady state and transient analysis of the conveyor was done.
13
Content available remote Przepływ siluminu AK12 w kanałach metalowych form odlewniczych
Mutwil J., Niedźwiecki D.
Archiwum Odlewnictwa
|
2001
|
R. 1, nr 1
169--176
PL
Opisano podstawowe cechy przepływu siluminu AK12 w prostych kanałach form metalowych. Oceniono wpływ parametrów zalewania, a także zabiegu modyfikacji fosforem, na cechy przepływu.
EN
The basic attributes of the AK12 aluminum-silicon alloys flow in the straight channels of metal moulds have been presented. The influence on the flow attributes of both the pouring parameters and the modification treatment has been estimated.
14
Content available remote Krzepnięcie strugi siluminu AK7 w piaskowych i metalowych kanałach form odlewniczych
Mutwil J., Niedźwiecki D.
Archiwum Odlewnictwa
|
2001
|
R. 1, nr 1
177--182
PL
Opisano wpływ materiału i średnicy kanału formy na kinetykę oraz zakres temperatur krzepnięcia płynącej w nim strugi siluminu AK7. Określono temperaturę zatrzymania przepływu.
EN
The influence of both the channel material and the channel diameter on the solidification kinetic and the solidification range of the flowing stream of AK7-silumin has been described. The temperature of the flow stopping has been determined.
15
Współczesne problemy krajowych odlewni w zakresie mechanizacji formierni
Smyksy K., Schroeder K., Sujkowski K.
Zeszyty Naukowe. Mechanika / Akademia Techniczno-Rolnicza w Bydgoszczy
|
1998
|
Z. 43 (216)
133-138
PL
W artykule przedstawiono nowoczesne tendencje w zakresie mechanizacji wykonywania form odlewniczych z syntetycznych, formierskich mas bentonitowych. Na tle tych tendencji przedstawiono analizę aktualnego stanu krajowego odlewnictwa oraz omówiono możliwości i kierunki modernizacji formierni.
EN
On the base of technical review of modern moulding machines and moulding lines, the present state of moulding plant mechanization in Polish Foundries has been analysed. The authors underline some aspects which are considerably influencing on the operation of moulding lines. Some data from chosen Polish Foundries have been presented.
16
Przegląd aktualnych zagadnień mechanizacji i automatyzacji odlewniczych procesów technologicznych
Gregoraszczuk M., Smyksy K., Fedoryszyn A.
Zeszyty Naukowe. Mechanika / Akademia Techniczno-Rolnicza w Bydgoszczy
|
1998
|
Z. 43 (216)
137-143
PL
Podkreślając rozwój mechanizacji i automatyzacji procesów odlewniczych, wskazano na jego aktualne tendencje. Przedstawiono skrótowy przegląd współczesnych zagadnień mechanizacji i automatyzacji odlewniczych procesów technologicznych.
EN
Some aspects of mechanization and automatisation of chosen foundry processes have been described. The authors pay special attention to the role of mechanization and automatization of foundry process for improvement both casting quality and industrial safety. He described problems mainly have been concerned with green sand technology. Some remarks about the present situation of polish foudries in mentioned area have been given.
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