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Wyszukujesz frazę "materials cutting" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Impact of cutting units’ design on biomass cutting resistance
Autorzy:
Zastempowski, Marcin
Bochat, Andrzej
Janiec, Maciej
Hujo, Lubomir
Jablonicky, Juraj
Powiązania:
https://bibliotekanauki.pl/articles/2204589.pdf
Data publikacji:
2022
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
biomass cutting
drum cutting unit
plant material
mathematical modelling
cutting of fibrous materials
Opis:
The paper presents mathematical models describing the moments of resistance to cutting on the cutting drum shafts in the biomass cutting process. The mathematical procedures described in the paper have been verified on a test stand developed and constructed by the authors, which reflects real conditions of the process of cutting plant material into pieces of specified lengths. Experimental verification proved that the developed mathematical models are adequate for drums of both cylindrical and conical constructions. The value of the average error did not exceed 13%. Following the mathematical elaboration and verification studies, the authors carried out calculations for machines currently available on the market that are equipped with drum cutting units. The calculations were carried out for the most commonly cut material, i.e. for maize, straw and green plant materials. The obtained results confirm the complexity of the problem arising from a wide range of numerical values of cutting resistance, which is contained in the range of 400–1,800 nm. The compiled database can be practically applied in the selection of machines for specific field works, and the mathematical models developed and verified in the study can be applied at the stage of designing new designs of cutting drums used in forage harvesters.
Źródło:
Acta Mechanica et Automatica; 2022, 16, 3; 159--265
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crossing axes of workpiece and tool at grinding of the circular trough with variable profile
Autorzy:
Kalchenko, V.
Yeroshenko, A.
Boyko, S.
Powiązania:
https://bibliotekanauki.pl/articles/387140.pdf
Data publikacji:
2018
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
circular trough
grinding
equidistant curves
cutting edge
abrasive surface
abrasive materials
crossed axes
abrasive wheel
orientation angle
grinding performance
Opis:
In the article the method of grinding with crossed axes of the tool and the workpiece got further developed. The work discloses a method of processing details having an external surface with a profile in the form of an arc of a circle of variable radius (for example, rolls of pipe rolling mills). The particular three-dimensional geometric models of the processing, shaping and profiling of abrasive wheels have been developed. A method for controlling the grinding process, which ensures the removal of allowances along equidistant curves has been offered. The developed method of grinding provides a constant depth of cutting according to the coordinate of profile processing. This is achieved at the expense of the synchronous inclination of the wheel and its insertion by the size of the allowance. The diameter of grinding wheel affects on the maximum angle of orientation of the wheel has been proven. It has been shown that increasing the diameter of the abrasive wheel has led to a slight decrease in value orientation angle.
Źródło:
Acta Mechanica et Automatica; 2018, 12, 4; 281-285
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of contact geometry of tool and workpiece in grinding process with crossed axes of the tool and workpiece with circular profile
Autorzy:
Kalchenko, Volodimyr
Yeroshenko, Andrij
Boyko, Sergiy
Kalchenko, Olga
Powiązania:
https://bibliotekanauki.pl/articles/1837951.pdf
Data publikacji:
2021
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
circular arc
grinding
equidistant curves
cutting edge
abrasive surface
abrasive materials
crossed axes
abrasive wheel
heat stress
grinding performance
Opis:
A general model is developed, and on its basis, there are special models formulated of the grinding process with crossed axes of the tool and workpiece with a profile in the form of a circle arc. A new method of control of the grinding process is proposed, which will provide processing by equidistant curves, and the amount of cutting of a circle equal to the allowance. This will increase the productivity and quality of grinding. The presented method of grinding implements the processing with the spatial contact line of the tool and workpiece. When the axes are crossed, the contact line is stretched, which leads to an increase of the contact area and, accordingly, to a decrease of the temperature in the processing area. This allows processing of workpieces with more productive cutting conditions.
Źródło:
Acta Mechanica et Automatica; 2021, 15, 1; 9-15
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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