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Wyszukujesz frazę "cutting process" wg kryterium: Wszystkie pola


Tytuł:
Unitary energy in the black radish cutting process
Autorzy:
Starek, A.
Kusińska, E.
Powiązania:
https://bibliotekanauki.pl/articles/411383.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
unitary cutting energy
knife sharpening angle
cutting velocity
energia jednostkowa cięcia
kąt ostrzenia noża
prędkość cięcia
Opis:
The article presents the methodology and results of measurement of the unitary energy in cutting black radish. The values of the unitary energy of cutting the root parenchyma of black radish sampled in several areas were analysed. To compare the values of the unitary cutting energy related to the differences in the structure of the black radish root, the samples were cut at the longitudinal and transverse orientation of the fibres relative to the movement of the working tool. The cutting process was carried out using knives with a sharpening angle of 5°, 10°, and 15° and cutting velocity values of 100 mm·s-1, 200 mm·s-1, 300 mm·s-1, and 400 mm·s-1. The results obtained were subjected to mathematical analysis in Statistica 8.0 software. The statistical analysis showed a significant correlation between the value of the unitary energy and sampling site, the knife sharpening angle and the velocity of knife movement. The highest value of the unitary cutting energy was obtained at a sharpening angle of β=15° and the lowest value was observed when the knife with the β=5° sharpening angle was used. The unitary cutting energy decreased with the increase in the knife movement velocity.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2017, 6, 2; 103-108
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hazard analysis and risk assessment in metal cutting process
Autorzy:
Kotus, Martin
Drlička, Róbert
Mikuš, Rastislav
Žarnovský, Jozef
Powiązania:
https://bibliotekanauki.pl/articles/2064921.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
safety
threat
risk rate
manufacturing plant
band saw
Opis:
The paper deals with the issue of occupational health and safety in a metalworking manufacturing organization. Hazard and threat have been defined when cutting metal materials with a band saw. We assessed the risk by an extended point method, where we determined the risk rate values. In most cases of sawmill work, we found a “moderate” or “negligible” risk. The highest, ‘serious’ risk we found in a possible electric shock. In this case, we have also taken the necessary actions. As a precaution, we have also proposed safety measures for other threats.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 382--391
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Milling tool deformation caused by heating during the cutting process
Autorzy:
Moravek, M.
Burian, D.
Brajer, J.
Vyroubal, J.
Powiązania:
https://bibliotekanauki.pl/articles/99636.pdf
Data publikacji:
2014
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
milling tool
laser beam
process
thermal distortions
Opis:
The presented paper describes an experiment dealing with the deformation of a milling tool caused by heating during the cutting process. Based on the literature review an experimental procedure is designed to simulate heating of the milling tool during machining. The experimental heating of the milling tool is realized using a laser beam. The frequency of laser radiation and the length of each pulse are selected in order to simulate the real cutting process. The output power of the laser radiation is 10W or 20W. During the experiment deformation and temperature of the tool are measured. In the second part of the presented article an experiment is carried out investigating the heating and deformation of the milling tool during real machining of an aluminium alloy. The experiment consists of several test cycles, when a different amount of material is removed. Deformations of the tool and also of the machine tool are measured immediately after milling, and during cooling to ambient temperature. The results clearly show that there is a significant temperature rise of the milling tool during the cutting process, which mainly causes milling tool extension in the axial direction. The conclusion of the experiment is that the thermal deformation of the milling tool during machining cannot be neglected, as it can also be a source of certain errors.
Źródło:
Journal of Machine Engineering; 2014, 14, 2; 81-92
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real-Time Compensation of Machine Tool Thermal Error Including Cutting Process
Autorzy:
Horejs, O.
Mares, M.
Hornych, J.
Powiązania:
https://bibliotekanauki.pl/articles/99782.pdf
Data publikacji:
2015
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
thermal error
real-time compensation
cutting process
Opis:
The challenge to be addressed by this paper is to extend the common machine tool thermal compensation models considering only internal heat sources to include the effects of the cutting process. Although real-time software compensations of thermal errors exist, the majority of these models only presume machine tools under load-free rotation of the main spindle without any reference to rough machining. The machining process is completely neglected in spite of the fact that it represents a significant heat source and causes workpiece inaccuracy. This paper presents a real-time compensation of three-axis vertical milling centre thermal errors including the cutting process effect. The simulation is based on dynamic modelling using transfer functions. The model was implemented into a standard CNC controller of a three-axis vertical milling centre to compensate for thermal errors in real time. The inputs of the compensation algorithm are the spindle rotational speed, the 5 temperatures of the machine structure and spindle power. A reduction of thermal errors achieved by using the new approximation TF model including cutting process impact is up to 79% for steel cutting tests with different cutting conditions.
Źródło:
Journal of Machine Engineering; 2015, 15, 3; 5-18
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring of cutting process in end milling of hard and brittle materials
Autorzy:
Shimana, K.
Kondo, E.
Yoshidome, A.
Yamashita, S.
Kawano, Y.
Powiązania:
https://bibliotekanauki.pl/articles/99634.pdf
Data publikacji:
2014
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
glass milling
micromachining
brittle materials
end mill
Opis:
Glass materials have been widely used in optical components in recent years. The purpose of this study was to develop an effective method for real-time detection of the state of cutting tools used in end milling of hard brittle materials. Cutting tests were performed to identify parameters that are useful in monitoring micro tool wear in glass milling. A specific component of the cutting force was found to be related to the progression of tool wear. Furthermore, using fast Fourier transform (FFT) analysis, the peak amplitudes of the cutting forces were found to occur at a specific frequency.
Źródło:
Journal of Machine Engineering; 2014, 14, 4; 55-64
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Drgania w procesie skrawania stopu tytanu
Vibrations in cutting process of titanium alloy
Autorzy:
Rusinek, R.
Powiązania:
https://bibliotekanauki.pl/articles/300756.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
stopy aluminium
proces skrawania
dynamika skrawania
titanium alloys
cutting process
dynamics of cutting
Opis:
This work presents experimental investigations of cutting process in which the titanium alloy (Ti6Al4V) is cut. During the experiment the cutting forces and displacements of the workpiece are measured as a function of the cutting depth. The obtained signals are analysed using methods useful for nonlinear phenomena that is the method of delay coordinates, Poincare maps and recurrence plots. The results let us identify kind of vibrations and select the most proper cutting parameter. Finally, the results of titanium alloy cutting are compared with outcomes of classical and stainless steel machining.
Praca przedstawia wyniki badań eksperymentalnych procesu skrawania stopu tytanu Ti6Al4V. W eksperymencie mierzono siły skrawania oraz przemieszczenia przedmiotu obrabianego podczas skrawania z różnymi głębokościami. Następnie, zarejestrowane sygnały przeanalizowano metodą współrzędnych opóźnionych, stosowaną do badania zjawisk nieliniowych, otrzymując mapy Poincare i wykresy rekurencyjne. Wyniki tych badań pozwoliły na identyfikację rodzaju drgań i dobór odpowiednich parametrów skrawania. W ostatniej części pracy wyniki badań skrawania stopu tytanu porównano z wynikami otrzymanymi dla klasycznej i kwasoodpornej stali.
Źródło:
Eksploatacja i Niezawodność; 2010, 3; 48-55
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method of identification of complex cutting forces acting in unstable cutting process
Autorzy:
Bach, P.
Polacek, M.
Chvojka, P.
Burian, D.
Drobilek, J.
Powiązania:
https://bibliotekanauki.pl/articles/99872.pdf
Data publikacji:
2014
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
chatter
stability inaccuracy
complex cutting forces
forces identification
Opis:
The calculations of machining stability limit currently known do not provide a precise prediction of chatter-free cutting conditions. The inaccuracy is probably caused by mathematical models of dynamic forces acting on the cutting process during unstable machining. These models need to be modified. A new analysis of experimental data measured by one of the authors, M. Poláček, in the 1968-1974 period, forecasted an existence of several dynamic forces, which are mutually phase-shifted, thus complex. This fact has not been thoroughly investigated previously. As the assumed forces cannot be calculated from any equations, they must be identified experimentally. This research paper proposes a theoretical method of an experimental identification of these forces. The new model is intended to be used in the future for the development of a more accurate calculation of stability diagram.
Źródło:
Journal of Machine Engineering; 2014, 14, 4; 18-28
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental study of mild steel cutting process by using the plasma arc method
Autorzy:
Magid, H.M.
Powiązania:
https://bibliotekanauki.pl/articles/2055758.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
cutting power
edge roughness
mild steel
plasma arc cutting
scanning speed
moc skrawania
chropowatość
stal miękka
cięcie plazmowe
prędkość skanowania
Opis:
Purpose: In this study, plasma arc cutting (PAC) is an industrial process widely used for cutting various away types of metals in several operating conditions. Design/methodology/approach: It is carried out a systematic or an authoritative inquiry to discover and examine the fact, the plasma cutting process is to establish the accuracy and the quality of the cut in this current paper assessed a good away to better the cutting process. Findings: It found that the effect of parameters on the cutting quality than on the results performed to accomplish by statistical analysis. Research limitations/implications: The objective of the present work paper is to achieve cutting parameters, thus the quality of the cutting process depends upon the plasma gas pressure, scanning speed, cutting power, and cutting height. Practical implications: The product of the plasma cutting process experimentally has been the quality of the cutting equipment that was installed to monitor kerf width quality by exam the edge roughness, kerf width, and the size of the heat-affected zone (HAZ). Originality/value: The results reveal that were technically possessed of including all the relevant characteristics, then a quality control for the cutting and describe the consequence of the process parameters.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2021, 108, 2; 75--85
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity analysis of the constitutive models in FEM-based simulation of the cutting process
Autorzy:
Niesłony, P.
Grzesik, W.
Powiązania:
https://bibliotekanauki.pl/articles/99793.pdf
Data publikacji:
2013
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
FEM
constitutive models
simulation
cutting process
Opis:
The paper considers the problem of the influence of constitutive model parameters on the results of FEM-based simulation of the orthogonal cutting process using C45 (AISI 1045) carbon steel and multilayer-coated carbide tool. The simulations were based on the power constitutive law (PL) with a special consideration of the temperature-related thermal influences. The sensitivity analysis performed concerns the models proposed by Özel and Kalhori and own data in the form of multi-regressive equations for the substrate and coating components that were applied. In particular, the values of n exponent were varied in order to assess the simulation results. The FEM simulations include the average interface temperature, the distribution of temperature on the rake face and within the wedge body, as well as cutting forces. By modifying the PL parameters, the prediction errors lower than 15% were obtained.
Źródło:
Journal of Machine Engineering; 2013, 13, 1; 106-116
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problematyka badawcza cięcia warstwy materiału anizotropowego
Research issues of anisotropic material layer cutting process
Autorzy:
Bochat, A.
Korpal, K.
Powiązania:
https://bibliotekanauki.pl/articles/2072743.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
cięcie
materiał anizotropowy
bębnowe zespoły tnące
cutting
anisotropic material layer
drum cutting system
Opis:
Przedstawiono analizę oraz podsumowanie dotychczasowych badań doświadczalnych procesu cięcia na sieczkę warstwy anizotropowego materiału roślinnego w bębnowych zespołach tnących. Podano zależności między parametrami, cechami konstrukcyjnymi bębna tnącego a właściwościami fizykomechanicznymi materiału roślinnego. Stwierdzono, że publikowane wyniki badań doświadczalnych często są nieporównywalne z powodu różnic w programach i metodyce badań. Wskazane są zatem dalsze badania w celu obniżenia energochłonności cięcia oraz prace nad nowymi konstrukcjami bębnowych zespołów tnących.
Analysis and summary of previous experimental studies on the cutting of anisotropic layer of plant material in drum cutting systems are presented in the paper. Relations between parameters, design features of cutting drum and physico-mechanical plant material properties are given. It was found that published results of experimental studies often cannot be compared due to differences in programs and research methodology. Therefore, further research are recommended in order to develop new constructions of drum cutting units and to reduce the cutting energy consumption.
Źródło:
Inżynieria i Aparatura Chemiczna; 2013, 2; 51-53
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł

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