Wszystkie pola: roughness parameters - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Optimizing cutting parameters in hard turning of AISI 52100 steel using TOPSIS approach
Autorzy:: Umamaheswarrao, Ponugoti
Ranga Raju, D.
Suman, Koka Naga Sai
Ravi Sankar, B.
Powiązania:: https://bibliotekanauki.pl/articles/95287.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: machining force
surface roughness
TOPSIS
optimization
siła skrawania
chropowatość powierzchni
optymalizacja
Opis:: In the present work optimization of cutting parameters is performed while hard turning of AISI 52100 steel with polycrystalline cubic boron nitride (PCBN) tools using Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). Experiments are planned and conducted based on Center Composite Rotatable Design (CCD) of the Response Surface Method (RSM). Cutting speed, feed, depth of cut, nose radius and negative rake angle are considered as input parameters. In this study machining force (F) and surface roughness (Ra) are measured during the experiment. Analysis of variance (ANOVA) is deployed to determine the influence of process parameters. Obtained optimal parameters are speed 200 rpm, feed 0.1 mm/rev, depth of cut 0.8 mm, nose radius 1.2 mm and negative rake angle 45º.
Źródło:: Journal of Mechanical and Energy Engineering; 2019, 3, 3; 227-232
2544-0780
2544-1671
Pojawia się w:: Journal of Mechanical and Energy Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Role of Si on machined surfaces of Al-based automotive alloys under varying machining parameters
Autorzy:: Razin, Ahmed Asif
Ahammed, Dewan Salsabil
Nur, Maglub Al
Kaiser, Mohammad Salim
Powiązania:: https://bibliotekanauki.pl/articles/2106430.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: Al-Si alloys
roughness
temperature
chips
microstructure
stopy Al-Si
chropowatość
temperatura
wióry
mikrostruktura
Opis:: A morphological change due to Si contend into Al-based automotive alloys has been conducted on the characterization of machined surfaces in terms of roughness, temperature, chips formation as well as microstructure evaluation under different machining conditions. For this experiment, a shaper machine with HSS single point V-shaped cutting tool is used at different cutting speeds and depths of cut. The experimental results show that the surface roughness of the alloys decreases with the cutting speed and depth of cut but it is more prominent in the case of the cutting speed. This is because of a high cutting speed, which is more associated with the higher temperature and softening the work material leading to better surface finish. Higher Si added alloys also exhibit a better surface finish because the sample content is different fine and hard intermetallic due to ageing treatment, which also makes the alloys more brittle. For brittle and higher hardness, it produces a higher temperature during machining. During machining, relatively curly and short chips are formed by the high Si added alloy because of its low elongation properties. The fracture surfaces of higher Si added alloy display more crack propagation obtained by plate-like Si rich intermetallic.
Źródło:: Journal of Mechanical and Energy Engineering; 2022, 6, 1; 43--52
2544-0780
2544-1671
Pojawia się w:: Journal of Mechanical and Energy Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Optimum combination of machining parameters during drilling of aluminium 7075 alloys using Grey based Taguchi approach
Autorzy:: Sreenivasulu, Reddy
Rao, Chalamalasetti Srinivasa
Powiązania:: https://bibliotekanauki.pl/articles/1819169.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: drilling
burr size
surface roughness
roundness error
thrust force
torque
Taguchi method
grey relational analysis
wiercenie
chropowatość powierzchni
błąd okrągłości
siła odporowa
moment obrotowy
metoda Taguchi
szara analiza relacyjna
Opis:: From ancient days to till today manufacturing industries, especially making of holes on the parts during drilling process for precision assembling of parts facing problems with burr formation. Drilling operation is one of the finishing operation in the production cycle, removing of burrs during drilling process is a time consuming and non-value added process to the manufacturing sector. So reducing the size of burrs is the main aim of the present study. In the present work, optimization of burr size is considered during drilling of aluminium 7075 alloy. In this connection, experiments are conducted based on Grey based Taguchi. From Grey relational grades of responses selected optimal combination of parameters to attain multiple performance characteristics of responses with a corresponding higher grey relational grade. For identifying the most significant input parameters that influence the output responses ANOVA is conducted. Based on interaction effect plots of data means of responses from results of ANOVA, confirmation tests are conducted by choosing most significant parameters. Finally, observations reveals that feed rate, point and clearance angles are the most influential factors on burr size and also experimental results divulge that the lower the thrust force causes to decrease the burr height. The proposed approach is helpful to the budding entrepreneurs in the related areas to select optimal combination of drilling parameters to attain multiple performance characteristics of responses especially in burr size to prevent the post finishing operations up to certain extent.
Źródło:: Journal of Mechanical and Energy Engineering; 2020, 4, 3; 227--238
2544-0780
2544-1671
Pojawia się w:: Journal of Mechanical and Energy Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Optimization of machining parameters during end milling of super alloys using grey based taguchi method coupled with entropy measurement technique
Autorzy:: Sreenivasulu, Reddy
Rao, Chalamalasetti Srinivasa
Powiązania:: https://bibliotekanauki.pl/articles/95277.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: CNC end milling
inconel 718 super alloy
burr height
surface roughness
grey based Taguchi method
entropy measurement
frezowanie CNC
superstop Inconel
chropowatość powierzchni
metoda Taguchi
pomiary entropii
Opis:: High-quality products include those with better surface quality and texture, close dimensional tolerances and form accuracies at precise level, increase fatigue life and burr-free. Burr formation is one of the most common inevitable facts occurring in all material removal processes, reduces assembly and machined part quality. But, burr formation during milling is a more complex mechanism compare to remaining machining burrs and leads to numerous difficulties during the deburring process. To prevent this, one should optimize the combination of cutting parameters during machining itself. In order to build up a link between quality and productivity and to attain the same in the cost-effective way, the present work concentrate on multi objective optimization of CNC end milling process parameters. Multiple performance characteristics with respect to surface quality and performance index like assembly work have been put up, to assess an equivalent single quality index (called grey relational grade) has been optimized finally by Grey based Taguchi method. After that priority weight of individual quality and performance attributes has been estimated by entropy measurement technique on the basis of relative significance and check the feasibility of the proposed technique has been demonstrated in this context.
Źródło:: Journal of Mechanical and Energy Engineering; 2020, 4, 1; 47-56
2544-0780
2544-1671
Pojawia się w:: Journal of Mechanical and Energy Engineering
Dostawca treści:: Biblioteka Nauki

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