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1
Content available remote Water mist effect on cooling process and microstructure of silumin
100%
Władysiak R.
|
2009
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tom Vol. 9, iss. 3
205-210
EN
The paper presents the results of the process of crystallization and cooling of the AlSi11 silumin and temperature distribution in the wall of iron and bronze research casting die in the temperature field of 750 to 100oC in casting of the silumin with use of water cooling mist in the air at a pressure of 0.30 to 0.40MPa and the water from 0.35 to 0.45MPa. Showing the nature and rate of change of temperature in die casting and the formation of temperature gradient on the thickness of the die casting wall in the direction of the nozzle surface of the outer wall of the cooling die casting. Using derivation curves and regression equations there has been compared: the mean and instantaneous rates of crystallization and cooling cast in values of 750 - 200oC. In addition, there are presented the differences arising from the microstructure change of the die's type and thickness of its walls, the thickness of cast and the fact of using cooling water mist. The conduct of the changes of the hardness of the cast as a result of the applied cooling method of the die casting. It has been shown that the use of water mist with a variability of the die's wall thickness in the cooling zone gives control of the crystallization process, microstructure and mechanical properties of the final silumin cast.
2
Content available remote Heat transfer analysis during cooling of die with use of water mist
100%
Władysiak R.
|
2011
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tom Vol. 11, iss. 3
167-174
EN
The paper presents the results of the heat transfer area during the cooling process of steel test die with water mist which consist the flow of air in the range 150-350 l/min and 0.05 0.24 l/min of water. Temperature change in the thickness of die by means showing with the thermal curves and the temperature gradient and temperature distribution in the space between the nozzle and the cooled surface of the metal mold using a thermal imaging camera and thermocouples measurement. The course of changes in the temperature gradient and the received heat flux from the die while cooling its with the flow of air and water mist stream. It has been shown that the use of water mist with a variable flow of air and water controls the process of heat transfer process between the permanent molds, and a stream of water mist.
3
Content available remote Reengineering of permanent mould casting with lean manufacturing methods
100%
Władysiak R.
|
2007
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tom Vol. 7, iss. 3
205-212
EN
At the work were introduced main areas of production system project of casts produced in permanent moulds, that constitutes reengineering of conventional production system according to Lean Manufacturing (LM) methods. New resolution of cooling of dies with water mist was shown to casting of car wheels made from aluminium alloys in low pressure casting process. It was implemented as a part of goal-oriented project in R.H. Alurad Sp.z o.o. in Gorzyce. Its using intensifies solidification and self-cooling of casts shortening the time of casting cycle by the 30%. It was described reorganizing casting stations into multi-machines cells production and the process of their fast tool's exchange with applying the SMED method. A project of the system was described controlling the production of the foundry with the computer aided light Kanban system. A visualization of the process was shown the production of casts with use the value stream mapping method. They proved that applying casting new method in the technology and LM methods allowed to eliminate down-times, to reduce the level of stocks, to increase the productivity and the flow of the castings production.
4
Content available remote Water mist effect on cooling range and efficiency of casting die
100%
Władysiak R.
|
|
tom Vol. 8, iss. 4
213-218
EN
This project is showing investigation results of cooling process of casting die in the temperature range 570÷100 °C with 0.40 MPa compressed air and water mist streamed under pressure 0.25÷0.45 MPa in air jet 0.25÷0.50 MPa using open cooling system. The character and the speed of changes of temperature, forming of the temperture’s gradient along parallel layer to cooled surface of die is shawing with thermal and derivative curves. The effect of kind of cooling factor on the temperature and time and distance from cooling nozzle is presented in the paper. A designed device for generating the water mist cooling the die and the view of sprying water stream is shown here. It’s proved that using of the water mist together with the change of heat transfer interface increases intensity of cooling in the zone and makes less the range cooling zone and reduces the porosity of cast microstructure.
5
Content available Effect of multipoint sequential water mist cooling of casting die on microstructure and mechanical properties of AlSi11 alloy
100%
Władysiak R.
|
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tom Vol. 12, iss. 4
145-150
EN
The work is a continuation of research on the use of water mist cooling in order to increase efficiency of the die-casting process for aluminum alloys. The paper describes the multipoint sequential cooling system of the casting die and its computer control and monitoring. It also includes results of the tests and analysis of cooling methods during making of the casting. These methods differ from each other in the sequence of casting die cooling and cause effective changes in microstructure and mechanical properties of castings made of AlSi11 alloy. The study demonstrated that the use of multipoint sequential cooling with water mist affects the microstructure refinement and reduces the segregation in the cast as well as more than by 20% increases the mechanical properties of castings in the rough state. The study also demonstrates that the sequential cooling of casting die accelerates the cooling of the casting and shortens die-casting cycle.
6
Content available remote Wspomaganie komputerowe planowania produkcji żeliwa
100%
Władysiak R.
|
|
tom R. 2, nr 6
285-294
PL
W pracy przedstawiono przykładowo wyniki badań planowania produkcji ciekłego żeliwa na stanowisku topienia z zastosowaniem systemu komputerowego klasy ERP/MRPII "Infor: NT". Pokazano przebieg wprowadzania danych elementów procesu produkcyjnego, niezbędnych do planowania zlecenia produkcyjnego, za pomocą tego systemu. Potwierdzono możliwość implementacji systemu Infor: NT w odlewni.
EN
The possibilities of Infor: NT computer system application for production planning of cast iron on melting workstation has been presented here. It has been shown the downloading of production process data, that requisite to execute the planning of production order. It has been confirmed that there is possibilities of Infor: NT implementation in foundry.
7
Content available remote Reengineering systemu produkcji odlewów precyzyjnych
100%
Władysiak R.
Archiwum Odlewnictwa
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2006
|
tom R. 6, nr 19
413-424
PL
W pracy przedstawiono wyniki badań procesu produkcyjnego odlewów precyzyjnych metodą wytapianych modeli woskowych oraz projekt zmian w systemie produkcyjnym potwierdzonych filozofią nowoczesnego wytwarzania Lean Manufacturing. Pokazano schemat rozmieszczenia stanowisk oraz przebieg procesu wytwórczego. Wykazano możliwość zastosowania jednocześnie z metodyką LM komputerowego systemu ERP w produkcji odlewów precyzyjnych.
EN
The results of investigation of investment casting production system are presented in this paper. The changes of production system are owing to Lean Manufacturing philosophy. It's shawn the layout chart of work centers of manufacturing process. It's presented that there are the possibilities of precision casting production with both items implemented simultaneously: Lean Manufacturing methodology and Enterprise Resource Planning computer system.
8
Content available remote Wybrane sposoby optymalizacji produkcji w odlewni za pomocą komputerowego systemu MRPII/ERP
100%
Władysiak R.
|
|
tom R. 4, nr 12
261--274
PL
W pracy przedstawiono efektywność stosowania funkcji: optymalizacja sekwencji systemu komputerowego planowania i sterowania produkcją infor:NT do optymalizacji ilości i czasu wytwarzania form odlewniczych. Pozwala ona zwiększyć ilość realizowanych zleceń produkcyjnych poprzez zmianę kolejności ich wykonywania, optymalizując odpowiednio według czasu jednostkowego lub czasu zbrojenia. Funkcja jest szczególnie przydatna w produkcji małoseryjnej na stanowiskach wymagających narzędzi specjalnych i oprzyrządowania technologicznego.
EN
This paper presents the efficiency of use of sequence optimization function of production planning computer system infor:NT in casting moulds manufacturing optimization. It makes possible increase of orders number of production plan with the aid of the realization sequence change. The optimization can make adequately according to time per unit or setuptime of operation. The function is especially useful for planning of small lot production at the work stations, which require of technological instrumentation and special tools.
9
Content available An Application for Infrared Camera in Analyzing of the Solidification Process of Al-Si Alloy
63%
Władysiak R. , Kozuń A.
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tom Vol. 15, iss. 3
81--84
EN
The paper presents the results of the crystallization process of silumin by the TDA thermographic method and the results of the cast microstructure obtained in the sampler TDA-10, that was cooling down in ambient air. The study was conducted for silumin AlSi11 unmodified. The work demonstrated that the use of thermal imaging camera allows for the measurement and recording the solidification process of silumin. Thermal curve was registered with the infrared camera and derivative curve that was calculated on the base of thermal curve have both a very similar shape to adequate them TDA curves obtained from measurements using a thermocouple. Test results by TDA thermographic method enable quantitative analysis of the kinetics of the cooling and solidification process of neareutectic silumin.
10
Content available Effect of Water Mist Cooling on Microstructure of Hypereutectic Al-Si Alloy
63%
Władysiak R. , Kozuń A.
|
|
tom Vol. 14, iss. 3
117--122
EN
The work is a continuation of research on the use water mist cooling in order to increase efficiency of die-casting aluminum alloys using multipoint water mist cooling system. The paper presents results of investigation of crystallization process and microstructure of synthetic hypereutectic AlSi20 alloy. Casts were made in permanent mold cooled with water mist stream. The study was conducted for unmodified AlSi20 alloy and modified with phosphorus, titanium and boron on the research station allowing sequential multipoint cooling using a dedicated program of computer control. The study demonstrated that the use of mold cooled with water mist stream allows the formation of the microstructure of hypereutectic silumins. A wide range of solidification temperature of hypereutectic silumins increases the potential impact of changes in the cooling rate on a size, a number and a morphology of preeutectic silicon and eutectic α+β (Al+Si).
11
Content available Structure of AlSi20 Alloy in Heat Treated Die Casting
63%
Władysiak R. , Kozuń A.
|
|
tom Vol. 15, iss. 1
113--118
EN
The work is a continuation of research on the use of water mist cooling in order to increase efficiency of die-casting aluminum alloys using multipoint water mist cooling system. The paper presents results of investigation on crystallization process and microstructure of synthetic hypereutectic AlSi20 alloy. Casts were made in permanent mold cooled a with water mist stream. The study was conducted for unmodified AlSi20 alloy and a modified one with phosphorus, titanium and boron on the research station allowing sequential multipoint cooling using a dedicated program of computer control. The study demonstrated that the use of mold cooled with water mist stream and solution heat treatment allows in wide range for the formation of the microstructure of hypereutectic silumins. It leads to the growth of microstructure refinement and spheroidizing of phases in the casting.
12
Content available remote Possibilities of obtaining and controlling high-quality pressure castings
51%
Pietrowski S. , Walczak W. , Pisarek B. , Władysiak R.
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2011
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tom Vol. 11, iss. 3
125-142
EN
The paper presents the influence of the type of furnace charging melting, refining and modification silumins 226 and 231 on the porosity and microstructure of castings. It was shown that in order to reduce or eliminate the porosity of the castings is necessary to the refining ECOSAL-AL113 of liquid silumin both in the melting furnace, and in the ladle and an additional nitrogen, in the heat furnace modified and refining with nitrogen. To control the effects of refining and modifying the TDA method was used. It was found that based on crystallization curve can be qualitatively assess the gas porosity of the castings. In order to control and quality control silumins author developed a computer program using the method of TDA, which sets out: Rm, A5, HB and casting porosity P and the concentration of hydrogen in them. The program also informs the technological procedures to be performed for liquid silumin improper preparation.
13
Content available remote System komputerowy kontroli i sterowania jakością siluminów przeznaczonych na koła samochodowe
51%
Pietrowski S. , Pisarek B. , Władysiak R.
Archiwum Odlewnictwa
|
2003
|
tom R. 3, nr 10
112--125
PL
W pracy przedstawiono autorski System Komputerowy Kontroli i Sterowania Jakością Siluminów (j. ang. CAQCSS - Computer Aided Quality Control of Silumins System) przeznaczonych na koła samochodowe - felgi. W programie sterującym systemu wykorzystano metodę ATD. W pracy podano charakterystyczne wielkości wyznaczane tą metodą, stanowiące podstawę opracowanych zależności statystycznych oraz przedstawiono istotę komunikacji systemu z operatorem w zależności od zawartości wodoru w ciekłym siluminie. System wdrożono w Federal-Mogul Gorzyce S. A.
EN
It presents Computer Aided Quality Control of Silumins System with use of TDA method. It serves characteristic largeness, appoint TDA method, which are elements of elaborated mathematic equations and it presents idea of communication of system with operator depending on H2 content in liquid silumin. The system has implemented in Federal-Mogul Gorzyce S. A.
14
Content available Effect of Casting Die Cooling on Solidification Process and Microstructure of Hypereutectic Al-Si Alloy
51%
Władysiak R. , Pacyniak T. , Kozuń A.
|
15
Content available The Effect of Water Mist Cooling of Casting Die on the Solidification, Microstructure and Properties of AlSi20 Alloy
51%
Władysiak R. , Kozuń A. , Pacyniak T.
|
|
tom Vol. 62, iss. 1
187--194
EN
Unmodified AlSi20 alloy were casted at the research station, allowing for sequential multipoint cooling using a dedicated computer- controlled program. This method allows for the formation of the microstructure of hypereutectic AlSi20 alloy and also increases hardness. Primary silicon dendrites were found in the microstructure of cooled samples. Based on these dendrites, the formation of primary silicon particles is explained. Cooling of casting die with a water mist stream causes changes in solidification, which leads to expansion of the boundary layer with columnar crystals and shrinkage of the core zone with equiaxed crystals. It also causes more regular hardness distribution around pre-eutectic Si crystals, which can lead to tensile strength and machinability improvement.
16
Content available Examining the Possibilities of Analyzing the Solidification Process of Al-Si Alloy with the Infrared Camera
51%
Władysiak R. , Kozuń A. , Pacyniak T.
|
|
tom Vol. 16, iss. 1
89--94
EN
The paper presents the results of the crystallization process of silumin by the TDA thermographic method and the results of the cast microstructure obtained in the sampler ATD-10, that was cooling down in ambient air. The study was conducted for silumins AlSi8 and AlSi11 unmodified. The work demonstrated that the use of thermal imaging camera allows for the measurement and recording the solidification process of silumin. Thermal curve was registered with the infrared camera and derivative curve that was calculated on the base of thermal curve have both a very similar shape to adequate them TDA curves obtained from measurements using a thermocouple. Test results by TDA thermographic method enable quantitative analysis of the kinetics of the cooling and solidification process of hypo- and neareutectic silumins.
17
Content available Analysis of Crystallization Process of Intensive Cooled AlSi20CuNiCoMg Alloy
51%
Władysiak R. , Pacyniak T. , Kozuń A. , Dębowska K.
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nr 2
18
Content available The Effect of Water Mist Cooling of Casting Die on the Solidification, Microstructure and Properties of AlSi20 Alloy
32%
Władysiak R. , Pacyniak T. , Kozuń A.
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nr 1
19
Content available Improvement of Artistic Cast Production System
32%
Władysiak R. , Pacyniak T. , Trzoska J.
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