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Tytuł:
The influence of grinding speed on the creep-feed grinding process
Autorzy:
Żyłka, Ł.
Płodzień, M.
Babiarz, R.
Powiązania:
https://bibliotekanauki.pl/articles/95323.pdf
Data publikacji:
2018
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
grinding
creep-feed grinding
CFG
surface quality
grinding speed
szlifowanie
szlifowanie z posuwem pełzającym
jakość powierzchni
prędkość szlifowania
Opis:
Grinding is usually the last stage of the technological process and determines the quality of manufactured products. One of the varieties of grinding more and more often used in practice is deep grinding which is called Creep-Feed Grinding. It is characterized by a high value of grinding infeed and slow feed. Technological parameters such as the depth of grinding and the speed of feed have a significant impact on the quality of the workpiece. However, also the grinding speed has an influence on the grinding process and the result of machining. Therefore, experimental studies on the impact of grinding speed on the surface roughness and grinding force components were carried out. The tests were realized in the deep-grinding grinding process of Inconel 718 with a grinding wheel made of mixture of sintered alumina and ruby corundum.
Źródło:
Journal of Mechanical and Energy Engineering; 2018, 2, 4; 285-290
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of macro-geometry of the grinding wheel active surface on traverse internal cylindrical grinding process
Autorzy:
Nadolny, K.
Kapłonek, W.
Ungureanu, N.
Powiązania:
https://bibliotekanauki.pl/articles/95239.pdf
Data publikacji:
2017
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
grinding wheel active surface
GWAS
conic chamfer
internal cylindrical grinding
traverse grinding
powierzchnia czynna ściernicy
nakrój stożkowy
szlifowanie cylindryczne
szlifowanie osiowe
Opis:
This article presents results of experimental tests of internal cylindrical traverse grinding in which the total machining allowance is removed in a single pass. Grinding wheels with zone-diversified structure made on basis of abrasive grains from Al2O3 were used in the process. Such tools are characterized by different construction of rough and finish grinding zones. Moreover, conic chamfer is shaped on their active surface that allows for even distribution of machining allowance on the grinding wheel surface. What is described in the hereby work is a device for precise shaping of conic chamfer on the grinding wheel active surface (GWAS). The work also presents results of tests whose aim was to determine the influence of grinding wheel macrogeometry on the process of internal cylindrical traverse grinding of internal cylindrical surfaces made from steel 100Cr6. Changes of selected parameters of the machined surface geometric structure (Ra, Rz, RSm, Rdq and RTp) and values of the grinding power P were analyzed. It was proved that the greater the conic chamfer width, the better the results.
Źródło:
Journal of Mechanical and Energy Engineering; 2017, 1, 1; 15-22
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrodischarge and electrochemical grinding of special materials
Szlifowanie elektroerozyjne i elektrochemiczne materiałów specjalnych
Autorzy:
Ruszaj, Adam
Cygnar, Mariusz
Furyk-Grabowska, Karolina
Grabowski, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/29521097.pdf
Data publikacji:
2022
Wydawca:
Akademia Nauk Stosowanych w Nowym Sączu
Tematy:
electrodischarge machining
EDM
electrochemical machining
ECM
hybrid electrodischarge grinding
AEDM
hybrid electrochemical grinding
AECM
surface layer properties
obróbka elektroerozyjna
obróbka elektrochemiczna
obróbka hybrydowa-szlifowanie elektroerozyjne
obróbka hybrydowa-szlifowanie elektrochemiczne
właściwości warstwy wierzchniej
Opis:
In Electrochemical Machining (ECM), material is removed “atom by atom” as the result of an electrochemical dissolution process. Under optimal parameters for this process the tool has no wear and the quality of the surface layer, metal removal rate and accuracy are satisfactory for special application in the automotive or aerospace industries. However, ECM has also some limitations connected with electrolyte flow through interelectrode gap, machined surface passivation phenomena or heat and hydrogen generation, quick temperature increase and high probability of electrical discharges and difficulties with machining composite materials. In Electrodischarge Machining (EDM), material from workpiece is removed during electrical discharges occurring in the machining area as a result of material melting, evaporating and sometimes breaking as a result of high internal stresses. This way of material removal introduces significant changes in surface layer properties and reaching a satisfactory surface layer roughness and high accuracy is possible only for a rather small metal removal rate. In order to overcome the above-mentioned problems, some hybrid abrasive ECM and EDM processes have been worked out and successfully applied in industry. Here, some results from the authors’ own research, industrial applications and data from the literature are presented.
W obróbce elektrochemicznej (ECM) materiał usuwany jest „atom po atomie” w wyniku procesu roztwarzania elektrochemicznego. W procesie tym przy zastosowaniu optymalnych parametrów nie występuje zużycie narzędzia, a jakość warstwy wierzchniej, prędkość usuwania materiału oraz dokładność są zadowalające dla specjalnych zastosowań w przemyśle samochodowym, lotniczym i kosmicznym. Obróbka ECM posiada też pewne ograniczenia związane z przepływem elektrolitu przez szczelinę międzyelektrodową, zjawiskami pasywacji obrabianej powierzchni, generowaniem ciepła oraz wodoru, szybkim wzrostem temperatury i dużym prawdopodobieństwem wyładowań elektrycznych oraz trudnościami w obróbce materiałów kompozytowych. W obróbce elektroerozyjnej (EDM) ubytek materiału z przedmiotu obrabianego realizowany jest podczas wyładowań elektrycznych występujących w obszarze obróbki w wyniku topienia, parowania, a czasem pękania materiału w wyniku dużych naprężeń wewnętrznych. Taki sposób usuwania materiału wprowadza znaczące zmiany właściwości warstwy wierzchniej, a osiągnięcie zadowalającej chropowatości warstwy wierzchniej i wysokiej dokładności obróbki jest możliwe przy stosunkowo niewielkiej prędkości usuwania materiału. W celu przezwyciężenia powyższych problemów, opracowano i z powodzeniem zastosowano w przemyśle hybrydowe procesy ścierne ECM oraz EDM. Poniżej przedstawiono wybrane wyniki badań własnych autorów, jak również zastosowania przemysłowe oraz dane literaturowe.
Źródło:
Journal of Engineering, Energy and Informatics; 2022, 1; 51-62
2720-4162
2720-5541
Pojawia się w:
Journal of Engineering, Energy and Informatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Movement properties of antiresonance vibration mill with symmetrical construction
Autorzy:
Cieplok, Grzegorz
Piekaj, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2146609.pdf
Data publikacji:
2020
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
vibration mill
vibration grinding
antiresonance
młyn wibracyjny
szlifowanie oscylacyjne
antyrezonans
Opis:
Vibration mills used in the industry are an alternative to conventional gravity mills. Compared to gravity mills they have much lower demand for energy of the milling process, significantly lower mass and several times lower cost of raw materials milling. In addition, they have much greater technological possibilities, which justifies their use in many cases. Apart from a number of advantages, vibration mills have disadvantages. The dynamics of work causes a significant transfer of vibrations to the ground and a major load on the vibrator bearings. As a result, they require temperature monitoring and the use of complex cooling systems. It is possible to reduce these negative effects by using new construction solutions.
Źródło:
Vibrations in Physical Systems; 2020, 31, 3; art. no. 2020302
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maintenance Operations: Workstation Adjustment, Working Posture, and Workers’ Perceptions
Autorzy:
Delleman, N. J.
Powiązania:
https://bibliotekanauki.pl/articles/90793.pdf
Data publikacji:
2000
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
ergonomics
pneumatic
oxy-gas
cutting
grinding
guidelines
ergonomia
cięcie
szlifowanie
wytyczne
Opis:
In the study maintenance workers were involved in pneumatic wrenching, oxy-gas cutting, and grinding at 5 different heights. Working posture and workers’ perceptions were measured. Guidelines on working height were formulated in order to minimize the load on the musculoskeletal system. Data from the present experiment as well as from literature were studied in depthin order to disclose generic mechanisms behind the adoption of working postures during visual-manual operations in relation to workstation adjustment. It was found, for instance, that the working posture was constrained by a strictly followed relationship between gaze inclination and head inclination for-/backwards. Also, the study provided insight into the role of visual interference, viewing distance, manipulation distance, hand grip of the tool, and body support for stability. Concerning evaluation criteria for working postures, it was concluded that neck flexion/extension (i.e., head inclination for-/backwards versus trunk inclination for-/backwards) seems to be the dominant determinant of neck load, as compared to head inclination for-/backwards. Furthermore, the position of the upper arm with respect to the trunk, that is, shoulder flexion/retroflexion in particular, seemed to be a dominant determinant of shoulder and shoulder girdle load, as compared to upper arm elevation.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2000, 6, 1; 3-46
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grinding of the gears with high depth processing
Autorzy:
Scaticailov, S.
Powiązania:
https://bibliotekanauki.pl/articles/95293.pdf
Data publikacji:
2017
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
profile grinding
gear wheels
model
precision
errors
szlifowanie profilowe
koła zębate
precyzja
błędy
Opis:
The following paper presents the analysis and synthesis of technological schemes, processes, tools and equipment for processing of conical gears and precession gears with medium module. As a result, a new method which allows to intensify the process of treatment, is proposed. It ensures a required accuracy of processing. The theoretical considerations are based on the theory of gear drives, theory of involute profiles generation and precession gears, generating machine, tool design theory and machine building technology. Methods of mathematical analysis, analytic geometry, mathematical model and 3D computer model are used. The experimental research was conducted in laboratories of the Departments of Machine Building Technology and the Department of Fundamentals of Machines Design at the Technical University of Moldova, by using machines and technological equipment for machining and testing. Experimental data processing was accomplished using approximation methods and mathematical statistics.
Źródło:
Journal of Mechanical and Energy Engineering; 2017, 1, 2; 129-134
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Basis of biomass grinders sustainable designing
Autorzy:
Kruszelnicka, Weronika
Tomporowski, Andrzej
Flizikowski, Józef
Kasner, Robert
Cyganiuk, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/88614.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
sustainable designing
grinding
safety
efficiency
projektowanie zrównoważone
szlifowanie
bezpieczeństwo
efektywność
Opis:
Grinding operations are one of the most commonly used preparation processes in many branches, for example in food, energy and chemical sectors. This paper focuses on the issues connected with design of technical objects in accordance with sustainable development assumptions. The aim of this study is to create methodology of sustainable design of grinding machine, including external influences involved in their operation, to increase safety, energy, economic and eco- efficiency. The problem formulated as a question: what techniques, equipment, methods, and ways should be used in design to obtain a new, better grinder structure? To resolve the problem, original methodology of sustainable design has been created.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 542-549
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grinding of stainless steel X6CrNiMoTi and its final roundness
Autorzy:
Naprstkova, N.
Novak, M.
Cais, J.
Powiązania:
https://bibliotekanauki.pl/articles/111954.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
roughness
analyses
stainless steel
grinding
chropowatość
analiza
stal nierdzewna
szlifowanie
Opis:
Machining of stainless steels is often an important technology used in production. Products made from these materials are very often used in mechanical engineering, and quality of work-piece surface after machining respective grinding is one of the important parameters that to us speak about the quality of the machining process. One of these parameters that can to give evidence about the quality of the surface is for rotating part the roundness. Its measurement is one of the important sources of information about how cutting conditions can affect the quality of the machined surface. The paper deals with the influence of cutting conditions when grinding steel X6CrNiMoTi (EN ISO) on the roundness of a machined surface.
Źródło:
Production Engineering Archives; 2014, 5, 4; 18-21
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the forming process of conical-like helical surfaces with roller tools
Autorzy:
Kacalak, W.
Budniak, Z.
Szafraniec, F.
Powiązania:
https://bibliotekanauki.pl/articles/265640.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
grinding
CAD/CAE
axial profile
helical surface
Matlab
szlifowanie
układ technologiczny
Opis:
The article presents a methodology of an analysis and modeling of technological systems and the grinding process of conical-like helical surfaces with the use of modern CAD/CAE systems and calculations in the Matlab system. The methodology developed allows one to carry out simulation tests for the accuracy of the grinding process of helical surfaces taking into consideration the deviations of the location and shape of the system’s elements, axial and radial striking the spindle of the workpiece machined and the grinding wheel as well as the tool’s geometrical features.
Źródło:
International Journal of Applied Mechanics and Engineering; 2017, 22, 1; 101-110
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Impact of Technological Conditions on Surface Burning in Grinding of the Orbit
Autorzy:
Stančeková, Dana
Mrázik, Jozef
Rybicka, Iwona
Náprstková, Nataša
Kraus, Pavel
Powiązania:
https://bibliotekanauki.pl/articles/101908.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
grinding
orbit
quality
burning
szlifowanie
orbita
jakość
palenie
Opis:
A process of quality development helps us reveal concrete deficiences, an analysis of their origin and realization of required modifications that are needed to solve a concrete problem. One of the aims of quality development of production in bearing industries is to find out an impact of tchnological conditions to form burning of surfaces in grinding of orbits of bearing rings. We try to describe an origin of the problem, to find reasons of burned surfaces in a process of grinding and to propose such technological conditions to avoid above-stated problems and to produce the least possible number of non-identical workpieces. To lower a number of burnings in grinding of the orbit to zero percentage is not real, however, we have to try to get a minimal number of parts with damaged surface.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 4; 19-27
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Specific Cutting Conditions of 100Cr6 Steel Grinding and Selected Final Roughness Parameters
Autorzy:
Náprstková, Nataša
Novák, Martin
Sviantek, Jan
Powiązania:
https://bibliotekanauki.pl/articles/102739.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
hardened steel
final surface
roughness
grinding
stal hartowana
powierzchnia końcowa
chropowatość
szlifowanie
Opis:
Grinding of hardened steels is often an important used technology at finishing. Products made from these materials in mechanical engineering are often used, and a quality of the workpiece surface roughness after grinding is one of the important parameters that to us speaks about the quality of the machining process. The paper deals with the influence of the selected cutting conditions when grinding bearing steel 100Cr6 (EN 10027–1) on their machined surface roughness.
Źródło:
Advances in Science and Technology. Research Journal; 2020, 14, 2; 184-189
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface layer properties of low-alloy high-speed steel after grinding
Autorzy:
Jaworski, J.
Trzepieciński, T.
Powiązania:
https://bibliotekanauki.pl/articles/386837.pdf
Data publikacji:
2016
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
grinding
high-speed steel
microhardness
secondary austenite
surface roughness
stal szybkotnąca
stal niskostopowa
szlifowanie
mikrotwardość stali
austenit
warstwa wierzchnia stali
Opis:
Investigations of the surface layer characteristics of selected kinds of low-alloy high-speed steel after grinding were carried out. They were carried out on the flat-surface grinder with a 95A24K grinding wheel without cooling. The influence of grinding parameters was defined especially for: the quantity of secondary austenite, surface roughness, microhardness and grinding efficiency with a large range of grinding parameters: grinding depth 0.005–0.035 mm, lengthwise feed 2–6 m/min, without a cross-feed on the whole width of the sample. It was found that improvement of grinding properties of low-alloy high-speed steels is possible by efficient selection of their chemical composition. The value of the grinding efficiency is conditioned by grinding forces, whose value has an impact on the grinding temperature. To ensure high quality of the tool surface layer (i.e. a smaller amount of secondary austenite, lack of wheel burn and micro-cracks) in the case of sharpening of tools made of low-alloy high-speed steel, the grinding temperature should be as low as possible.
Źródło:
Acta Mechanica et Automatica; 2016, 10, 4; 275-279
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficiency analysis of the disc working element in reference of treatment technology of concrete surface
Autorzy:
Kalinowski, J.
Rajczyk, Z.
Al-Mashadani, M.
Powiązania:
https://bibliotekanauki.pl/articles/2068406.pdf
Data publikacji:
2009
Wydawca:
Politechnika Częstochowska
Tematy:
beton
powierzchnia betonu
szlifowanie powierzchni
proces zacierania
concrete
concrete surface
grinding surface
process floating
Opis:
The article contains the theoretical bases of the analyses process floating causes and grinding concrete surface. The particular attention has been paid to quality factors of processing determined by roughness uniformity of processed surface.
Artykuł zawiera teoretyczne podstawy analizy procesu zacierania i szlifowania powierzchni betonowych. Szczególną uwagę zwrócono na parametry jakości obróbki określonej równomiernością szorstkości obrabianej powierzchni.
Źródło:
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo; 2009, 15 (165); 107-118
0860-7214
Pojawia się w:
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Traverse Grinding of X6CrNiMoTi Steel and its Final Surface Quality for Giving Cutting Conditions
Autorzy:
Naprstkova, N.
Novak, M.
Hricova, J.
Powiązania:
https://bibliotekanauki.pl/articles/111600.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
grinding
surface quality
stainless steel
cutting conditions
szlifowanie
jakość powierzchni
stal nierdzewna
warunki skrawania
Opis:
Machining of stainless steels is often an important used technology. Products made from these materials are often used in mechanical engineering and the quality of workpiece surface roughness after machining respective grinding is one of the important parameters that illustrates the quality of the machining process. This paper deals with the influence of cutting conditions when grinding steel X6CrNiMoTi (EN ISO) on the machined quality surface (roughness, circularity). Grinding of samples was carried out by feed grinding and the measured values were analyzed. On the machined samples parameters were all monitored and measured in the laboratory of precision measurements at the Faculty of Production Technology and Management of Jan Evangelista Purkyně University in Ústí nad Labem and the devices Hommel tester T1000 and Hommel tester Form 1000 were used. Measuring was done according to ČSN EN ISO 4287.
Źródło:
Production Engineering Archives; 2015, 7, 2; 49-52
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of process parameters on grinding forces and acoustic emission in machining tool steel 1.2201/NC10
Autorzy:
Sutowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/95245.pdf
Data publikacji:
2017
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
grinding process
acoustic emission
grinding force
effective value
szlifowanie
emisja akustyczna
siła szlifowania
wartość skuteczna
Opis:
The article presents the association of the output signals of the grinding process with the machining parameters. The article focuses on assessing the suitability of grinding force signal and acoustic signal acquisition for different process conditions. In the first part of the article the kinematic contact of abrasive grain with the workpiece analysis was carried out. By analogy to the micro-cutting process, geometric analyses are presented and the process parameters that have a major impact on the grinding zone load are indicated. Analytically it has been shown that elementary grinding speeds (wheel and workpiece speed) and grinding depth have a significant effect on recorded signal values. The work also presents a set of factors and phenomena that are sources of acoustic emission impulses in the grinding process. For a selected range of grinding parameters, an experimental verification was performed. The article presents the highly correlated relationship between grain penetration depth (maximum uncut chip thickness) and grinding force components, as well as the effective value of acoustic emission. The output signals of the grinding process were also compared, indicating the advantage of the acoustic emission signal above the grinding force in terms of the reaction speed (and lag) of the sensors to the phenomena occurring in the grinding zone.
Źródło:
Journal of Mechanical and Energy Engineering; 2017, 1, 1; 37-44
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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