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1

Influence of cutting parameters and tool edge geometries on the machinability of AlSi aisi 52100 steel in hard whirling

Song Shuquan, Zhang Yu, Cheng Jiangtao, Zhang Hao, Guan Xiangyu, Zuo Dunwen, Shen Xiaoqiang

Engineering Transactions

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2023

|

Vol. 71, iss. 3

399--417

EN

The synergistic effect of prepared tool edge and cutting parameters in hard whirling is still unclear, limiting its application in producing large precision ball screws. This paper aims to reveal the effect mechanism of cutting parameters and edge geometries in the whirling process to improve the stability of ball screw quality. A novel cutting force measurement strategy is proposed, and a systematic study of cutting force, surface quality and tool wear is implemented. The results show that small feed (less than 0.15 mm) and high cutting speed (more than 180 m/min) can ensure machining efficiency and improve surface quality. The machining quality can be improved when the edge radius is 10 µm, and the chamfer size is 0.1 mm × 20◦ . The tool with a 30 µm edge radius has a low probability of early failure, but the later wear is severe and timely sharpening is recommended. This study could guide cutting parameters and edge geometry optimization to improve the stability of the quality in hard whirling.

2

Effect of Machining Settings and Tool Geometry on Surface Quality After Machining of Al/CFRP Sandwich Structures

Doluk Elżbieta, Rudawska Anna

Advances in Science and Technology. Research Journal

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2022

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Vol. 16, no 3

22--33

EN

The paper describes the effect of cutting parameters and tool geometry on the surface quality after machining of an Al/CFRP (aluminium alloy/ Carbon Fibre Reinforced Plastics) sandwich structure. A two-layer sandwich structure made of an EN AW 2024 aluminium alloy and Carbon Fibre Reinforced Plastics (CFRP) was examined. The experiment used the process of peripheral milling. The experiment investigated the effects of cutting speed (vc), feed per blade (fz) and helix angle (λs) on surface quality as defined by differences in the height of materials. It was also analysed how the machining conditions described above affected the values of cutting force components. In the experimental stage of the study, uncoated, double-bit carbide mill cutters with working diameter Dc = 12mm and a variable helix angle (λs = 20˚, λs = 35˚, λs = 45˚) were used. The results have shown that cutting parameters and tool geometry do affect the surface quality and cutting forces after milling of the sandwich structure. The lowest material height difference was achieved when machining with the helix angle λs = 45˚, cutting speed vc = 300m/min and feed per blade fz = 0.08mm/blade. The highest material height difference occurred after machining under the following conditions: vc = 300m/min, fz = 0.08mm/min, λs = 20˚. The minimum cutting force value was obtained for cutting parameters: vc = 80m/min, fz = 0.08mm/blade during milling with the helix angle λs = 45˚. The maximum cutting force was recorded during machining with the helix angle λs = 20˚, cutting speed vc = 400m/min and feed per blade fz = 0.08 mm/blade.

3

Wyznaczanie funkcji trwałości ostrza przy toczeniu

Filipowski Ryszard, Ziętarski Stanisław

Obróbka Metalu

|

2021

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nr 4

36--40

PL

Przedstawiono algorytm tworzenia metodą skróconą funkcji trwałości ostrza przy toczeniu. Funkcję trwałości ostrza dla toczenia określają trzy parametry (v,f, a). Ich przestrzeń badań jest ograniczona wartościami minimalną i maksymalną. c p. Materiałem obrabianym była stal C55, ostrze narzędzia wykonane było z węglika spiekanego S10. Przyjęto plan badań z punktami gwiezdnymi o ramieniu α=1,414. Liczba badań wynosi 24 punkty. W punkcie centralnym planu wykonuje się pełny eksperyment zużycia ostrza. Za pomocą programu regresji wielomianowej REG6IJ5 tworzy się bezwymiarową charakterystykę zużycia ostrza. W pozostałych punktach planu wykonuje się eksperymenty krótkie, mierząc przyrost zużycia ostrza (∆VB) i czas skrawania (∆t). Trwałość ostrza w punkcie centralnym planu badań T, jej charakterystykę bezwymiarową oraz rezultaty krótkiego eksperymentu skrawania wykorzystuje się do obliczenia trwałości Tw pozostałych punktach planu badań. Uzyskana funkcja i trwałości ostrza przy toczeniu ma formę wykładniczą lub wielomianową drugiego stopnia. Funkcję trwałości ostrza wykorzystuje się do obliczenia parametrów skrawania w badanej przestrzeni czynnikowej oraz do obliczenia normy czasu w operacji toczenia.

EN

An algorithm has been developed for creating the edge life function using the shortened method for turning. The edge life function for turning is defined by three parameters: v, f, a. Their test space is bounded by minimum c p and maximum values of parameters. The test material was C55 steel and the tool blade was carbide. A five-level survey plan with star points of arm =1,414 was adopted. The number of studies was 24. A full edge wear experiment was performed at the focal point of the plan. The dimensionless characteristics of edge wear were developed using the REG6IJ5 polynomial regression program. At other points in the plan, short experiments were performed, measuring the increment of edge wear and cutting time (∆B, t). The edge life T at the focal point i i of the test plan, its dimensionless characteristics, the results of a short cutting experiment were used to calculate the life T i at the other points of the test plan. Blade life T, i=1,2,… , 24 and i the corresponding cutting parameters (v, f, a) are entered into ci i pi the stepwise multiple regression program REGSTEP. The resulting function of edge life for turning T = f(v, f, a) has an c p exponential or polynomial form of second degree. The edge life function can be used to calculate the cutting parameters in the factor space under study and to calculate the time standard in a turning operation.

4

Optymalizacja programów obróbczych na obrabiarkach CNC

Adamski Włodzimierz

Stal, Metale & Nowe Technologie

|

2020

|

nr 1-2

43--52

PL

W artykule podjęto próbę zrozumienia wpływu parametrów obróbki, takich jak: prędkość skrawania (m/min), prędkość posuwu (mm/min), głębokość skrawania (mm), które mają istotny wpływ na takie parametry wyjściowe jak chropowatość powierzchni i objętościowa wydajność skrawania osiągnięta w wyniku procesu optymalizacji.

EN

The paper attempts to explain the effect of machining parameters, such as cutting speed (m/min), feed rate (mm/min), cutting depth (mm), which have a significant impact on such output parameters as surface roughness and volume machining efficiency achieved as a result of the optimization process.

5

Vliânie parametrov rezaniâ na kačestvo obrabotki v processe sverleniâ otverstij v laminirovannoj

Dziabely Aliaksei, Podziewski Piotr

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2020

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No. 109

86--91

RU

Влияние параметров резания на качество обработки в процессе сверления отверстий в ламинированной ДСП (с использованием вертикального обрабатывающего центра с ЧПУ). Целью работы было определение влияния параметров резания на качество обработки в процессе сверления отверстий в ламинированной ДСП с использованием вертикального обрабатывающего центра с числовым программным управлением (ЧПУ) и только одним держателем, зажимающим заготовку снизу. Инструмент – сверло диаметром 15 мм. Эксперимент проводился при скорости вращения шпинделя 5000 об/мин. Рассмотрены три значения скорости подачи: 1,6 м/мин, 4,8 м/мин и 9,6 м/мин. В ходе испытаний, в каждом образце, были выполнены серии глухих отверстий в 5 рядах. Ряды были расположены на следующих расстояниях от нижней части заготовки: 50 мм, 225 мм, 400 мм, 575 мм и 750 мм. Качество полученных отверстий было определено максимальным диаметром (Dmax). В результате эксперимента ожидалось ухудшение при сверлении отверстий в верхних частях плиты. Анализируя результаты, было обнаружено, что худшее качество было получено на высоте 225 мм и 575 мм от нижнего края плиты.

PL

Wpływ parametrów skrawania na jakość obróbki podczas procesu wiercenia otworów w płycie wiórowej laminowanej (z zastosowaniem pionowego centrum obróbczego CNC). Celem artykułu było przeanalizowanie wpływu parametrów skrawania na jakość obróbki podczas wiercenia w płycie wiórowej laminowanej z zastosowaniem pionowego centrum obróbczego z jednym uchwytem mocującym obrabiany przedmiot od dołu. Narzędzie - wiertło o średnicy 15 mm. Eksperyment prowadzono ze stałą prędkością obrotową wrzeciona dla 3 wartości posuwu. W badanych próbkach wykonywano serie nieprzelotowych otworów w 5 rzędach oddalonych od elementu mocującego obrabiarki o 50 mm, 225 mm, 400 mm, 575 mm oraz 750 mm. Jakość otworów ustalono poprzez pomiar maksymalnej średnicy Dmax. W wyniku przeprowadzonego eksperymentu spodziewano się obniżenia jakości podczas wiercenia otworów w wyższych częściach formatki. Najniższą jakość uzyskano jednak na wysokości 225 mm oraz 575 mm od dolnej krawędzi elementów.

6

Influences on plasma cutting quality on CNC machine

Kudrna Lukas, Fries Jiri, Merta Marek

Multidisciplinary Aspects of Production Engineering

|

2019

|

Vol. 2, Iss. 1

108--117

EN

This article discusses plasma cutting technology and its influences on the quality of the resulting cut. Plasma or a plasma arch consists of positive and negatively charged particles, excited and neutral atoms and molecules. As it contains free particles, it is electrically conductive and thus subject to the effects of the electrical and magnetic field. The basis of CNC machine design is described in the article, which has at least 3 axes (x, y, z), but there are also more technologically demanding applications, such as pipe cutting, profile and cutting using chamfer to prepare surfaces for welding, where these multi-axis devices are frequently used. The principle of plasma cutting and the plasma cutting phase is described in this article. The materials that can be divided by a plasma arc are described in detail, including graphs displaying the dependence of sheet thickness on the cutting speed. The article describes and lists the gases that are used in plasma-arc cutting, such as oxygen, argon, hydrogen and nitrogen. Important components of plasma cutting technology are the parameters that can be adjusted and set before the cutting so that the cut is of good quality. The most comprehensive chapter deals with the influences that affect plasma cutting quality. Cutting quality can be influenced by a number of factors. Everything starts with the proper choice of a CNC machine and a plasma source. The quality also depends on the expertise and experience of the machine operator and the setting of the plasma cutting parameters. This issue of influences on the plasma cutting quality is based on long-term experience in the field of the thermal cutting process.

7

The possibility of applying acoustic emission method for monitoring lathing process

Dudzik Krzysztof

Journal of KONES

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2019

|

Vol. 26, No. 2

21--27

EN

Nowadays acoustic emission (AE) method is used in many fields of science, including in the diagnosis and monitoring of machining processes such as turning, grinding, milling, etc. Monitoring of turning process allows ensuring stable conditions of treatment. Stable conditions of turning process have a great impact on the quality of the surface. This is especially important during finishing treatment. The research was carried out on a universal ZMM-SLIVEN CU500MRD lathe centre-using tool with removable insert SANDVIK Coromant WNMG 080408 – WMX Wiper. Lathing process was performed on the shaft of 74 mm in diameter made of S235 steel. The research was carried out at constant cutting speed v = 230 m/min. Changed parameters were feed f = 0.1; 0.2; 0.4 mm/rev and cutting depth ap = 0.5; 0.75; 1 mm. In the research was used a set of acoustic emission Vallen System. The kit includes: 4 channel signal recorder AMSY 6, two measurement modules ASIP-2/S, preamplifier with a frequency range 20 kHz – 1 MHz and the strengthening of 34dB and AE signal measurement sensor type VS 150M, with a frequency range 100 – 450 kHz. During the study, the acoustic emission (AE) generated during the lathing process were recorded parameters e.g. amplitude, number of events – hits, the effective value of the signal (RMS). The test results indicate, that the higher instability of the process was during turning with parameters: ap = 0.75 mm and f = 0.1 mm/rev. The study can be the basis for the use of acoustic emission method for monitoring lathing process to ensure stable conditions of that process and the same to obtain a high quality surface.

8

The influence of cutting parameters on surface topography during turning marine pump shafts

Labuda Wojciech

Journal of KONES

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2019

|

Vol. 26, No. 4

141--148

EN

One of the greatest problems of modern production techniques is the achievement of an appropriate quality at minimal costs and accompanied by the production efficiency increase. Therefore, while designing the production process. The technology used should have a considerable influence on the durability and reliability of machine parts to be produced. During finish treatment, the final dimensions as well as functional properties are imparted to a given element by application of proper treatment type. The engineer has a range of production techniques to choose for the proper surface layer formation. Conventional turning machines belong to the basic equipment of ships, because in sea conditions, they enable the execution of a spare part or carrying out the necessary operations in the process of their regeneration. The use of modern cutting tools makes it possible to obtain a surface with low values of surface roughness parameters. The use of new generation cutting inserts on conventional lathes can cause problems for operators. The lack of the ability to ensure proper of treatment condition and setting errors of cutting tools contribute to the damage of the cutting insert or the surface of the workpiece. The article presents the results of influence of different cutting parameters on surface topography during turning process of stainless steel. A shaft made of 304L stainless steel was used for the research. The cutting process was carried out on a universal TUM 25B x 500 centre lathes. During the turning the following machining parameters were used: cutting speed Vc [m/min], feed f [mm/rev] and depth of cut ap [mm].The turning process was conducted by a cutting tool with CCGT 09T302 UM, CCGT 09T304 UM and CCGT 09T308 UM inserts. Measurement of surface topography was carried out by T8000 profilometer.

9

The influence of changing of treatment condition on surface roughness parameter during turning process by wiper insert

Labuda Wojciech

Journal of KONES

|

2019

|

Vol. 26, No. 1

81--88

EN

One of the greatest problems of modern production techniques is the achievement of an appropriate quality at minimal costs and accompanied by the production efficiency increase. Therefore, while designing the production process. The technology used should have a considerable influence on the durability and reliability of machine parts to be produced. During finish treatment, the final dimensions as well as functional properties are imparted to a given element by application of proper treatment type. The engineer has a range of production techniques to choose for the proper surface layer formation. It is crucial to find a suitable solution which will meet the requirements as well as the work conditions of a given machine part. The article presents the results of influence of change of cutting parameters on surface roughness parameter during turning process of stainless steel. A shaft made of 304L stainless steel was used for the research. The chemical composition of steel was measured by Solaris-ccd plus optical spectrometer. The cutting process was carried out on a universal CDS 6250 BX-1000 centre lathes. Measurement of surface roughness was carried out by T8000 profilometer. The turning process was conducted by a cutting tool with Wiper insert. During the turning, the following machining parameters were used: cutting speed Vc [m/min], feed f [mm/rev], cutting depth ap [mm] and additionally changed nose radius r [mm], and tool cutting edge angle ϰr [º]. The results of measurements of Ra parameter underwent statistic analysis. The calculations were conducted by Statistica software.

10

Optymalizacja programów obróbczych na obrabiarkach CNC

Adamski W.

Stal, Metale & Nowe Technologie

|

2018

|

nr 1-2

12--18

PL

W artykule podjęto próbę zrozumienia wpływu parametrów obróbki, takich jak: prędkość skrawania (m/min), prędkość posuwu (mm/min), głębokość skrawania (mm), które mają istotny wpływ na takie parametry wyjściowe jak chropowatość powierzchni i objętościowa wydajność skrawania osiągnięta w wyniku procesu optymalizacji.

EN

The paper attempts to explain the effect of machining parameters, such as cutting speed (m/min), feed rate (mm/min), cutting depth (mm), which have a significant impact on such output parameters as surface roughness and volume machining efficiency achieved as a result of the optimization process.

11

The influence of changing of cutting parameters on temperature and cutting forces during turning process by CCET09T302R-MF insert

Labuda W.

Journal of KONES

|

2018

|

Vol. 25, No. 1

249--256

EN

One of the greatest problems of modern production techniques is the achievement of an appropriate quality at minimal costs and accompanied by the production efficiency increase. Therefore, while designing the production process, the technology used should have a considerable influence on the durability and reliability of machine parts to be produced. During finish treatment, the final dimensions as well as functional properties are imparted to a given element by application of proper treatment type. The engineer has a range of production techniques to choose for the proper surface layer formation. It is crucial to find a suitable solution which will meet the requirements as well as the work conditions of a given machine part. The article presents the results of influence of change of cutting parameters on temperature and cutting forces during turning process of stainless steel. A shaft made of 304L stainless steel was used for the research. The cutting process was carried out on a universal CDS 6250 BX-1000 centre lathes. Measurement of cutting forces during turning process used DKM 2010 turning dynamometer. A cutting tool conducted the turning process with CCET09T302R-MF insert by DIJET. During the turning, the following machining parameters were used: cutting speed Vc = 226 m/min, feed f = 0.044; 0.062; 0.083; 0.106 mm/rev and cutting depth ap = 0.375; 0.625; 0.875 mm. The chemical composition of steel was measured by Solaris-ccd plus optical spectrometer. The Smartzoom 5 microscope made the view of the nose radius of cutting tool.

12

The use of Plackett-Burman plans and the analysis of expert opinions, in order to assess the significance of controllable parameters of the plasma cutting process

Feldshtein E., Patalas-Maliszewska J., Kłos S., Kałasznikow A., Andrzejewski K.

Eksploatacja i Niezawodność

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2018

|

Vol. 20, no. 3

443--449

EN

This article evaluates the significance of controllable parameters in the plasma cutting process, using the Plackett-Burman Method and the Analysis of Expert Opinions Method. The plasma cutting process was tested using a WPA-6000 Compakt plasma cutter, on non-alloy steel, of the S235JR EN 10025-2:2007 grade, with a carbon equivalent of 0.35%. The effect of the thickness of the sheet, the current flow rate, the cutting speed, the gas pressure during cutting, the height of the torch during cutting, the pierce delay time and the initial pierce height, were analysed. The research revealed the influence of the controllable parameters tested, in the plasma cutting process, on selected output parameters, surface cut drag lines, the width of the kerf at the inlet and outlet, and the value of the perpendicularity of the kerf on the surface of the base. The greatest influences were recorded for intensity of cutting current, cutting speed and gas pressure during cutting. The results obtained were confirmed by the results of the analysis of expert opinions.

PL

W artykule dokonano oceny istotności parametrów sterowalnych procesu cięcia plazmowego za pomocą metody Placketta-Burmana i analizy opinii ekspertów. Badania procesu cięcia plazmowego przeprowadzono przy użyciu przecinarki plazmowej WPA- 6000 Compakt na stali niestopowej konstrukcyjnej gatunku S235JR EN 10025-2:2007 z ekwiwalentem węglowym wynoszącym 0.35 %. Analizowano wpływ grubości blachy, natężenia prądu, prędkości cięcia, ciśnienia gazów podczas cięcia, odstępu palnika od blachy podczas cięcia, czasu dziurkowania oraz wysokości startu. Badania ujawniły wpływ badanych parametrów sterowalnych procesu cięcia plazmowego na wybrane parametry wyjściowe, w szczególności na skok śladów cięcia, na szerokość szczeliny na wejściu i wyjściu oraz na wartość prostopadłości szczeliny do powierzchni bazowej. Największe wpływy zarejestrowano dla natężenia prądu, prędkości cięcia oraz ciśnienia gazu podczas cięcia. Otrzymane wyniki badań zostały potwierdzone wynikami analizy opinii ekspertów.

13

Experimentation and Prediction of the Wear of a Cutting Tool in Turning Process

Merzoug M., Benamara N., Boulenouar A., Bouchouicha B., Mazari M.

Archives of Metallurgy and Materials

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2018

|

Vol. 63, iss. 2

563--573

EN

In the present work, the performance of multilayer coated carbide tool was investigated considering the effect of cutting parameters during turning of 34CrMo4 Low alloy steel. It has high strength and creep strength, and good impact tenacity at low temperature. It can work at –110°C to 500°C. And EN 10083-1 34CrMo4 owns high static strength, impact tenacity, fatigue resistance, and hardenability; without overheating tendencies. The objective functions were selected in relation to the parameters of the cutting process: surface roughness criteria. The correlations between the cutting parameters and performance measures, like surface roughness, were established by multiple linear regression models. Highly significant parameters were determined by performing an Analysis of variance (ANOVA). During the experiments flank wear, cutting force and surface roughness value were measured throughout the tool life. The results have been compared with dry and wet-cooled turning. Analysis of variance factors of design and their interactions were studied for their significance. Finally, a model using multiple regression analysis between cutting speed, fee rate and depth of cut with the tool life was established.

14

A choice of the optimum cutting ranges for cutting nozzles A-SD for selection of metallurgical material

Stančeková Dana, Rudawska Anna, Kulla Albert, Petrů Jana, Holubják Jozef

Advances in Science and Technology. Research Journal

|

2018

|

Vol. 12, no 3

106--113

EN

On the market there are plenty of machines for cutting of steel via a mixture of oxygen and flammable gases. Various manufacturers provide several types of torches, cutting nozzles and other equipment in their product range. Cutting nozzles are a component that significantly affects quality of cutting based in set parameters. However, data from catalogues and manuals by manufacturers on cutting parameters of nozzles are rarely in use in real conditions. That is why optimum cutting conditions for cutting via nozzles A-SD made by RHONA were tested and the final results were compared with those in the catalogue for a proper use in practice.

15

Ocena morfologii powierzchni stopu Inconel 718 po toczeniu wzdłużnym

Szablewski P., Chwalczuk T.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

|

2017

|

z. 89 [295], nr 3

379--384

PL

Celem przeprowadzonych badań było określenie wpływu parametrów skrawania na jakość powierzchni obrobionej podczas toczenia wzdłużnego superstopu Inconel 718 bez udziału cieczy chłodząco-smarującej. Zrealizowane badania posłużyły do określenia częstotliwości powstawania narostu (oblepień) na obrobionej powierzchni podczas obróbki na sucho. Uzyskane wyniki pokazują, że podczas obróbki stopów na osnowie niklu bez udziału cieczy chłodząco-smarującej najkorzystniej jest stosować większe głębokości skrawania i większe wartości posuwu. Podczas przeprowadzonych badań najmniejsze wartości częstotliwości powstawania narostu na powierzchni obrobionej otrzymano przy zastosowaniu najwyższych parametrów skrawania podczas prób, tj. f = 0,21 mm/obr. i ap = 0,3 mm. Z kolei najwyższe wartości częstotliwości powstawania narostu na powierzchni obrobionej otrzymano podczas skrawania z najmniejszymi parametrami, tj. f = 0,05 mm/obr. i ap = 0,05 mm. Rezultaty badań pokazują relację minimalnej grubości warstwy skrawanej z wartością promienia zaokrąglenia krawędzi skrawającej. Uwidacznia się to zwłaszcza przy małych przekrojach warstwy skrawanej.

EN

The aim of the research was to determine the effect of cutting parameters on the surface quality of Inconel 718 super alloy during longitudinal turning without the use of a lubricant. Completed research was used to determine the frequency of the accretion on the machined surface during dry turning. The results show that during machining of nickel based alloys without using a lubricant, it is preferable to use larger cutting depths and higher feed rates. During the tests, the smallest values of the frequency of accretion on the machined surface were obtained using the highest cutting parameters during the tests, ie. f = 0.21 mm/rev. and ap = 0.3 mm. Whereas the highest values of the frequency of accretion on the machined surface were obtained during the cutting with the lowest parameters, ie. f = 0.05 mm/rev. and ap = 0.05 mm. The results of the study show the relation of the minimum thickness of the cutting layer to the radius on the cutting edge. This is especially visible with small cross-section of the cutting layer.

16

Analiza kinematyczna parametrów procesu krojenia wkładów książkowych mimośrodowym nożem krążkowym

Janicki P., Petriaszwili G.

Przegląd Papierniczy

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2017

|

R. 73, nr 7

468--472

PL

W artykule przeprowadzono analizę kinematycznych parametrów procesu krojenia wkładów książkowych mimośrodowo ustawionym nożem. Ustalono, że w zależności od wybranych parametrów krojenia proces obróbki może być realizowany w dwóch trybach: krojenie nieprzerywane – ze stałym kontaktem ostrza noża z obrabianym materiałem oraz krojenie przerywane – z impulsowym oddziaływaniem ostrza noża na obrabiany materiał. Określono warunki realizacji procesu obróbki dla każdego trybu cięcia wkładów książkowych.

EN

The paper deals with the analysis of kinematic parameters of book block cutting using eccentric circular cutting knife. It was proven that depending on parameters, cutting process may be realized in to different modes: continuous cutting – with the constant cutting edge contact with cutting material and intermittent cutting process – with the impulse cutting knife action to treated material which is book block. Action conditions for two different cutting processes were established.

17

Wpływ wybranych warunków procesu cięcia strugą wodno-ścierną na odchyłkę okrągłości otworów cylindrycznych

Krajcarz D., Spadło S.

Mechanik

|

2017

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R. 90, nr 1

64--65

PL

Przedstawiano wyniki badań dotyczące wpływu trzech czynników wejściowych o trzech stopniach wartości kodowych, takich jak prędkość posuwu głowicy tnącej, odległość końca dyszy wodno-ściernej od ciętego materiału i wydatek dozowanego ścierniwa na wartość wyjściową, którą była odchyłka okrągłości mierzona w trzech przekrojach. Otwory zostały wycięte w stopie aluminium za pomocą wysokociśnieniowej strugi wodnej z dodatkiem ścierniwa.

EN

This paper discusses experimental results concerning the geometric accuracy of cylindrical holes. The input variables were the cutting speed, the distance between the abrasive water jet nozzle and the workpiece, and the abrasive mass flow rate. The output variables were roundness deviation, which were measured in three sections. The holes were made in aluminum alloy by a high-pressure jet of water containing almandine garnet as an abrasive substance.

18

Wpływ głębokości skrawania na czas maszynowy frezowania kieszeni kwadratowej

Skoczylas L., Skoczylas K.

Mechanik

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2016

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R. 89, nr 8-9

1162--1163

PL

Przedstawiono wyniki obliczeń czasów maszynowych frezowania głębokiej kieszeni kwadratowej. Obliczenia przeprowadzono w środowisku CAM dla różnych wariantów głębokości skrawania i średnicy frezów. Założono stałą końcową wartość promienia naroży kieszeni.

EN

The paper presents the results of machining time calculations of milling of deep square pocket. Calculations were performed in the CAM environment for different variants of cutting depth and diameter of tools. The calculations assumed a constant final value of the radius of the corners pocket.

19

The influence of the conditions of emulsion mist formation on the surface roughness of AISI 1045 steel after finish turning

Feldshtein E., Józwik J., Legutko S.

Advances in Science and Technology. Research Journal

|

2016

|

Vol. 10, nr 30

144--149

EN

The processes of machining have vital influence on the operating properties of machine parts because they ensure the formation of the required geometrical structure of the working surfaces and the condition of the top layer. In this paper the influence of emulsion mist parameters on Ra, Rz and RSm surface roughness parameters is described when finishing the turning of C45 carbon steel. It was found that cutting parameters have considerably greater influence on roughness parameters in comparison with emulsion mist conditions. When increasing cutting speed from 100 to 300 m/min Ra and Rz values decrease nearly 2 times, but RSm value does not depend on speed. When increasing feed rate from 0.1 to 0.2 mm/rev Ra, Rz and RSm values increase more than twice. Changes of emulsion mass flow and compressed air flow affect roughness parameters reach 9–15% of maximum. It was shown that Parameter Space Investigation method can be used efficiently for quick analysis of tested parameters and optimization of their values.

20

Wpływ parametrów technologicznych na energochłonność toczenia żeliwa sferoidalnego

Chudy R.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

|

2015

|

z. 105

29-32

EN

The paper presents influence cutting parameter to energy capacity cast iron. The study permitted to establish a strategy for energy saving.