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Wyświetlanie 1-15 z 20
Tytuł:
Study of Cross Wedge Rolling Process of BA3002-Type Railway Axle
Autorzy:
Pater, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2172355.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
cross wedge rolling
railway axle
FEM
Opis:
The paper deals with the concept of solid railway axle rolling using tools (rolls) in which the forming zones of individual workpiece steps are separated. Two types of tools were analysed, which were characterised by flat (typical solution) and convex (novel solution) forming surfaces of the wedge. Using the software Forge® NxT, simulations were performed of the rolling processes of the rail axle. Distributions of temperature, damage function, effective strain as well as force and torque courses were analysed. The results showed that it is possible to produce solid railway axles using the CWR method and confirmed the use of tools with a convex forming surface.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 2; 225--231
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Two-Roll and Three-Roll Cross Wedge Rolling Processes
Autorzy:
Pater, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2201884.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
cross wedge rolling
FEM
tools
load
energy
CWR
Opis:
Cross wedge rolling (CWR) is used for producing stepped axles and shafts as well as die forging preforms. In current industrial practice, CWR conducted with two tools is predominantly used, with the wedges mounted on rolls or flat tool plates. However, CWR can also be performed with the use of three wedge rolls. This paper begins with a review of previous studies on CWR conducted with the use of three rolls. After that, numerical simulations of two- and three-roll CWR processes for the same shaft are described. Obtained numerical results are then used to compare the two processes in terms of material flow kinematics, material temperature, stresses and strains, failure modes, as well as load and energy parameters. Finally, the Conclusions section presents the advantages of three-roll cross wedge rolling, providing a good starting point for further research on this promising forming method.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 1; 252--266
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FEM modelling of a helical wedge rolling process for axisymmetric parts
Autorzy:
Pater, Zbigniew
Tomczak, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/102535.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
helical wedge rolling
tools
force parameters
FEM
spiralne zwijanie klinów
narzędzia
parametry siły
MES
Opis:
The paper reports the results of a numerical analysis of helical-wedge rolling (HWR), a new metal forming method developed at the Lublin University of Technology. The numerical analysis was performed for three axisymmetric parts: a rotary cutter body, a stepped shaft and a ball pin. The numerical modeling was performed using the commercial simulation software Forge NxT 1.0. The paper examines changes in workpiece shape as well as variations in effective strains, temperatures, damage function, force parameters (on the rolls and guides), and torques acting on the rolls. It has been found that due to its advantages (low material losses and high efficiency), the new helical-wedge rolling process can be used as an alternative to currently employed methods for producing axisymmetric products.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 1; 115-126
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conception of Hollow Axles Forming by Skew Rolling with Moving Mandrel
Autorzy:
Pater, Zbigniew
Walczuk-Gągała, Patrycja
Powiązania:
https://bibliotekanauki.pl/articles/2123280.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
FEM
skew rolling
hollowed axle
Opis:
The article presents a conception of manufacturing a hollow axle using three skewed rolls moving at the same rotating speed, axially moving chuck and a moving mandrel. The outer shape of the axle is obtained as a result of combining the radial feed of the rolls with axial feed of the chuck. The hole in the axle, however, is obtained as a result of the mandrel acting on the workpiece while moving along with it. In order to assess the correctness of the presented concept of forming, a numerical simulation was performed in Simufact.Forming commercial software. The results of the simulation confirmed that the applied method allows one to manufacture large-size hollow axles. Moreover, information on force parameters of the forming process, which can be used for designing an industrial rolling mill was obtained.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 3; 146--154
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Analysis of Tube Piercing Processes in the Two-Roll and Three-Roll Mills
Autorzy:
Pater, Zbigniew
Wójcik, Łukasz
Walczuk, Patrycja
Powiązania:
https://bibliotekanauki.pl/articles/102961.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
tube piercing
strain
damage
FEM
przekłuwanie rurki
odkształcenie
uszkodzenie
MES
Opis:
The article presents a comparison of the piercing process conducted in a two-roll Diescher mill and a three-roll mill. The comparative analysis was based on the numerical simulations of the aforementioned processes, obtained using Forge NxT 1.1. software. It was stated that the most favourable manufacturing method is skew rolling in three-mill rolling mills. The mills operating in this scheme are less energy-consuming, whereas the manufacturing time is 30% shorter.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 1; 37-45
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Analysis of the Cross-Wedge of a Hollow Rail Axle
Autorzy:
Pater, Zbigniew
Lis, Konrad
Walczuk-Gągała, Patrycja
Powiązania:
https://bibliotekanauki.pl/articles/101874.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
cross wedge rolling
rail axle
FEM
walcowanie klinów poprzecznych
oś szynowa
MES
Opis:
The article presents an innovative method of manufacturing hollow rail axles using three combined wedge rolls. The proposed solution was evaluated using numerical simulation. Two cases of forming, differing in the wall thickness of the billet, were analysed. The geometry of the formed axles, distributions of the effective strain, temperature and damage function were presented. Moreover, the changes to the forces and torques acting on each roll were presented.
Źródło:
Advances in Science and Technology. Research Journal; 2020, 14, 1; 145-153
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the Value of the Damage Function in 1050A Aluminium Alloy
Autorzy:
Walczuk-Gągała, Patrycja
Pater, Zbigniew
Wójcik, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/102973.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
materials fracture
critical value of damage
1050A aluminium alloy
pęknięcie materiału
krytyczna wartość uszkodzenia
stop aluminium 1050A
Opis:
The article presents the problem of material cracking in metal forming processes. The authors describe and compare the values of damage obtained in classic tensile and compression tests as well as rotational compression of 1050A aluminium alloy in cold working conditions. The presented research methodology contains experimental tests as well as a numerical simulation conducted in Simufact.Forming v.15. An analysis of the damage values was calculated according to the normalised Cockcroft-Latham criterion. The research conducted showed that the damage value in the rotational compression test is greater than the values obtained by the means of other tests.
Źródło:
Advances in Science and Technology. Research Journal; 2020, 14, 2; 49-55
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Problem of Material Fracture Prediction in Cross Rolling Processes
Autorzy:
Pater, Zbigniew
Tomczak, Janusz
Bulzak, Tomasz
Zniszczyński, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/102559.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
materials fracture
cross rolling
FEM
pękanie materiałów
walcowanie poprzeczne
MES
Opis:
The paper deals with the problem of material fracture prediction in metal forming processes. It was found that the application of well-established solutions for ductile fracture prediction to the modelling of cross rolling processes leads to serious errors. These errors result from the fact that the limit value of the damage function determined via uniaxial tensile and compression tests is too low. Therefore, it is necessary to devise a new test in which the state of stress is similar to that in a cross wedge rolling process characterized by the occurrence of alternating compressive and tensile stresses.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 4; 184-189
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary analysis of a rotary compression test
Autorzy:
Pater, Zbigniew
Walczuk, Patrycja
Lis, Konrad
Wójcik, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/102567.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
materials fracture
rotary compression test
stress state
strain state
FEM
pękanie materiałów
test rotacyjnej kompresji
stan naprężenia
stan odkształcenia
MES
Opis:
The paper addresses the problem of material fracture in cross rolling processes. A new test based on rotary compression for determining limit values of the damage function after the Cockroft-Latham criterion is proposed. A FEM analysis is performed to determine the stress and strain states in a workpiece subjected to this test. The numerical results demonstrate that the axial region of the workpiece is characterized by the presence of alternating tensile and compressive stresses conducive to fracture. The distribution of the Cockroft-Latham integral in the axial region of the workpiece is determined.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 2; 77-82
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Critical Damage Function Values of CW008A Copper and S355 Steel in Tensile and Torsion Tests
Autorzy:
Walczuk-Gągała, Patrycja
Pater, Zbigniew
Wójcik, Łukasz
Lis, Konrad
Powiązania:
https://bibliotekanauki.pl/articles/2201923.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
materials fracture
damage criterion
tensile test
torsion test
FEM
Finite Element Method
Opis:
The article describes the problem of material fracture in metal forming processes. It describes and compares the values of damage functions obtained in classical tensile and torsion tests of two materials, i.e. CW008A copper and S355 steel under cold forming conditions. The presented research methodology includes experimental tests and numerical simulation carried out using Simufact.Forming v.15 software. The damage values were analysed according to various criteria, including the growth and coalescence of micro cracks (Rice&Tracey, Oyane, Argon), the initiation and development of ductile cracking in forming processes (Freudenthal, Cockroft-Latham, Brozzo, Oh) and using extended phenomenological models based on the history of stress triaxiality (Ayada) or the mean and equivalent stress (Zhan). The conducted tests showed that the values of the damage function depend on: the calibration test, the material grade and the geometry of the specimen.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 2; 173--180
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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