Wyniki wyszukiwania - BazTech

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Experimental and numerical investigations and optimisation of grain-oriented silicon steel mechanical cutting process

Patyk Radosław, Bohdal Łukasz, Gontarz Szymon

Acta Mechanica et Automatica

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2022

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Vol. 16, no. 3

292--300

EN

The process of mechanical cutting of magnetic materials has many advantages in the form of high efficiency with reduced process costs in relation to other cutting technologies; no thermal stresses in the material, which significantly deteriorate the magnetic properties; or the possibility of shaping materials taking into account long cutting lines. In industrial practice, it is very difficult to ensure appropriate conditions for the cutting process and its proper control. Currently, there are no data on the selection of technological parameters of the mechanical shear slitting process of grain-oriented silicon steel in terms of the obtained cutting surface quality and the obtained magnetic properties of the workpiece. The article presents the possibilities of forecasting the characteristic features of the cut edge and selected magnetic properties of grain-oriented silicon steel. For this purpose, proprietary numerical models using FEA (Finite Element Analysis) were used. Then, experimental studies were carried out, and the optimisation task was developed. The developed results enable the correct selection of technological parameters of the process, ensuring the appropriate quality of the cut edge of steel and minimal interference with the magnetic properties.

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Numerical simulation of shear slitting process of grain oriented silicon steel using sph method

Bohdal Ł., Tandecka K., Kałduński P.

Acta Mechanica et Automatica

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2017

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Vol. 11, no. 4

333--338

EN

Mechanical cutting allows separating of sheet material at low cost and therefore remains the most popular way to produce laminations for electrical machines and transformers. However, recent investigations revealed the deteriorating effect of cutting on the magnetic properties of the material close to the cut edge. The deformations generate elastic stresses in zones adjacent to the area of plastically deformed and strongly affect the magnetic properties. The knowledge about residual stresses is necessary in designing the process. This paper presents the new apprach of modeling residual stresses induced in shear slitting of grain oriented electrical steel using mesh-free method. The applications of SPH (Smoothed Particle Hydrodynamics) methodology to the simulation and analysis of 3D shear slitting process is presented. In experimental studies, an advanced vision-based technology based on digital image correlation (DIC) for monitoring the cutting process is used.

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Zastosowanie metody numerycznej i doświadczalnej do analizy procesu cięcia stopów aluminium na nożycach krążkowych

Bohdal Ł.

Pomiary Automatyka Kontrola

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2014

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R. 60, nr 10

913--916

PL

Przedstawiono metodykę pomiaru i analizy procesu cięcia opartą na analizie numerycznej i pomiarach wizyjnych. Analizy numeryczne zostały przeprowadzone z zastosowaniem metody elementów skończonych w Solwerze LS-DYNA. Metoda doświadczalna opierała się na rejestracji obrazu umożliwiając obserwację procesu w zwolnionym tempie i analizę płynięcia i pękania materiału. Wyniki analiz mogą być wykorzystane do projektowania procesu cięcia na nożycach krążkowych a także być podstawą doboru parametrów procesu w aspekcie jakości technologicznej wyrobu.

EN

The paper describe the methods of measurement and analysis of shearing process based on numerical and vision techniques. Numerical analysis were done in LS-DYNA solver with using finite element method. Developed incremental models allow for solving many problems without knowledge about boundary conditions in contact zones. Developed three dimensional model of the shear slitting process allow for complex analysis of stress and strains states during and after process. An experimental method was based on image recording and analysis of physical phenomena and cracking mechanism in slow motion. Using this method an analysis of plastic flow of material, states of displacement, and material deformation was done. Obtained results allow for better understanding of the process and can be used to development of new tools and shear slitting process design.

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Modelowanie procesu cięcia elementów pojazdów samochodowych na nożycach krążkowych

Bohdal Ł., Kukiełka L.

Autobusy : technika, eksploatacja, systemy transportowe

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2014

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R. 15, nr 6

43-47

PL

W artykule przedstawiono sposób modelowania procesu cięcia elementów pojazdów samochodowych na nożycach krążkowych z wykorzystaniem metody elementów skończonych. Symulację komputerową przeprowadzono dla przestrzennych stanów naprężeń i odkształceń z wykorzystaniem Solvera LS-DYNA oraz aplikacji LS-PrePost. Otrzymano mapy intensywności naprężeń i odkształceń dla dowolnej chwili czasowej z uwzględnieniem nieliniowości występujących w procesie. Przedstawiono wybrane wyniki analizy numerycznej, które mogą być wykorzystane do projektowania procesu i jego optymalizacji.

EN

The paper presents the modeling of the shear slitting process of the car elements using Finite Element Method. Numerical analysis was performed for the spatial states of stresses and strains in LS-DYNA solver and LS-PrePost application regarding process nonlinearities. Obtained maps of stresses, strains, displacement at any moment of time can be used for design of the process and it’s optimization.