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Wyszukujesz frazę "milling surface roughness" wg kryterium: Temat


Tytuł:
Classification and inspection of milling surface roughness based on a broad learning system
Autorzy:
Fang, Runji
Yi, Huaian
Wang, Shuai
Niu, Yilun
Tematy:
broad learning system
classification
milling surface roughness
rapid training
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/2173883.pdf  Link otwiera się w nowym oknie
Opis:
Current vision-based roughness measurement methods are classified into two main types: index design and deep learning. Among them, the computation procedure for constructing a roughness correlation index based on image data is relatively difficult, and the imaging environment criteria are stringent and not universally applicable. The roughness measurement method based on deep learning takes a long time to train the model, which is not conducive to achieving rapid online roughness measurement. To tackle with the problems mentioned above, a visual measurement method for surface roughness of milling workpieces based on broad learning system was proposed in this paper. The process began by capturing photos of the milling workpiece using a CCD camera in a normal lighting setting. Then, the train set was augmented with additional data to lower the quantity of data required by the model. Finally, the broad learning system was utilized to achieve the classification prediction of roughness. The experimental results showed that the roughness measurement method in this paper not only had a training speed incomparable to deep learning models, but also could automatically extract features and exhibited high recognition accuracy.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of cutting parameters on surface roughness and productivity when milling wood materials
Autorzy:
Loc, Nguyen Huu
Hung, Trinh Quoc
Tematy:
surface roughness
response surface
milling method
optimization
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Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:
https://bibliotekanauki.pl/articles/2052204.pdf  Link otwiera się w nowym oknie
Opis:
The quality of the machined surface is one of the most important criteria when products are processed. For different materials, there are differentially fitting processing technologies and cutting modes to ensure that the parts have surface roughness in the allowed value range. In this paper, the research on surface roughness of machining tropical wood by milling method is presented. It is necessary to establish and solve the optimal problems with such aims as the highest surface quality, minimum cutting power and the highest productivity in the optimal cutting mode. Using a great amount of experimental planning and many constrained nonlinear optimization problem solving methods, the authors built a process and solved the problem to determine the optimal cutting parameters such as feed per tooth Sz, tool tip radius ρ, depth of cut h, etc. that satisfy the above object. Research object is tropical wood chukrasia and this is the database to design woodworking machines by milling method and choose a reasonable working mode when processing on CNC machines.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on selected properties of surface layer of C45 steel objects after laser cutting and milling
Autorzy:
Zaleski, K.
Skoczylas, A.
Tematy:
milling
laser cutting
surface roughness
microhardness
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Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:
https://bibliotekanauki.pl/articles/103102.pdf  Link otwiera się w nowym oknie
Opis:
The article presents the results of studying the effects of technological parameters of milling upon surface roughness and microhardness of C45 steel objects after laser cutting. The metallographic structure formed as an effect of cutting by laser was also analyzed. The milling was performed on a FV-580a vertical machining centre. Depth of cut and feed per tooth were changed within the following range: ap = 0.09–0.18 mm and f z = 0.02–0.17 mm/tooth. To measure the surface roughness a Surtronic 3+ profile graphometer was used, whereas microhardness was measured with the use of a Leco LM 700AT microhardness tester. The surface roughness was significantly improved as a result of milling. The laser beam input and output zones were eliminated. Only a part of the layer hardened by laser cutting was removed while milling, in effect of which after milling the hardness of surface layer is much higher than hardness of the core.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface quality of a milled gamma titanium aluminide for aeronautical applications
Autorzy:
Radkowski, G.
Sep, J.
Tematy:
gamma titanium aluminide
milling
surface roughness
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/407010.pdf  Link otwiera się w nowym oknie
Opis:
Gamma titanium aluminides are an interesting alternative for nickel, iron or cobalt matrix superalloys. Due to the advantageous strength properties at high temperatures they can successfully replace superalloys in applications such as high pressure compressor blades, low pressure turbine blades, high pressure compressor case, low pressure turbine case. Milling is one of the processes that can be applied in the forming elements made from this type of alloys for the aviation industry. Research included the selection of tool, the process kinematics and the range of milling gamma titanium aluminide (Ti-45Al-5Nb-0.2B-0.2C) process parameters were carried out. Milling can be an effective method of forming of elements made of gamma TiAL in the range of processing parameters: vc = 20-70 m/min, ap = 0.3-0.7 mm, fz = 0.1- 0.45 mm/tooth. In the tests carried out the best results were obtained using a R300-016A20L- 08L milling cutter, S30T tool coating and in-cut milling.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usefulness of Modal Analysis for Evaluation of Milling Process Stability
Autorzy:
Pieśko, P.
Zawada-Michałowska, M.
Tematy:
modal analysis
stability
milling process
surface roughness
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Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Powiązania:
https://bibliotekanauki.pl/articles/117876.pdf  Link otwiera się w nowym oknie
Opis:
The paper presents evaluation of modal analysis usefulness for deter-mination of milling process stability. In the first phase of the study experi-mental modal analysis was performed and using CutPro 9.5 software, stability lobes were generated. In the next step, machining tests were carried out. The last stage of the experiment involved verification of modal analysis usefulness for evaluation of milling process stability based on sur-face roughness measurements. Conducted research allowed to state that modal analysis can be a useful tool for determining milling process stability.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface roughness analysis in milling tungsten carbide with CBN cutters
Autorzy:
Twardowski, P.
Tematy:
milling
tungsten carbide
CBN
surface roughness
dynamics
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/221007.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, an experimental surface roughness analysis in milling of tungsten carbide using a monolithic torus cubic boron nitride (CBN) tool is presented. The tungsten carbide was received using direct laser deposition technology (DLD). The depth of cut (ap), feed per tooth (fz) and tool wear (VBc) influence on surface roughness parameters (Ra, Rz) were investigated. The cutting forces and accelerations of vibrations were measured in order to estimate their quantitative influence on Ra and Rz parameters. The surface roughness analysis, from the point of view of milling dynamics was carried out. The dominative factor in the research was not feed per tooth fz (according to a theoretical model) but dynamical phenomena and feed per revolution f connected with them.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods of comparison of surface texture based on fractal dimension and Hotelling’s T2 test
Autorzy:
Gogolewski, Damian
Tematy:
face milling
fractal dimension
surface roughness
test
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Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:
https://bibliotekanauki.pl/articles/99764.pdf  Link otwiera się w nowym oknie
Opis:
Comparative analysis of the surface texture of machine parts can be successfully carried out using statistical tests. The paper presents a methodology of method used to compare the surface texture by applying Hotelling’s T2 test as well as a method used to evaluate surface topography by applying fractal dimension. The tests were carried out on samples produced with the use of face milling process for four types of materials. The following types of steel were used: 40HM, C45, NC6 and WCL. For each type of material, four areas were machined with the same machining parameters. Based on these results a decision was made whether the surfaces, despite the same machining conditions, were significantly different from each other. Furthermore, the analysis indicated that the fractal dimension enabled to characterise signal irregularities in quantitative and qualitative way.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface characterization by accurate measurement and image processing systems on machined surfaces of precision cutting tools
Autorzy:
Durakbasa, N. M.
Bogrekci, I.
Demircioglu, P.
Bas, G.
Gunay, A.
Tematy:
surface roughness
end milling
image processing
precision machining
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Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/385129.pdf  Link otwiera się w nowym oknie
Opis:
High precise measurement techniques and surface structure analysis are required in advanced fields of interchangeable manufacturing and precision engineering. This study presents the characterization of the surface roughness of the machined milling cutters by experimental precision measurements and the image processing tool. The data obtained are compared to assess the surface characterization parameters and computational data in terms of precision, accuracy, sensitivity, repeatability and resolution. In the experimental measurement phase, the roughness measurements and surface topography characterization were performed in the nanotechnology laboratory using the stylus profilometry and digital microscopy. The computational phase was performed using an image processing toolbox with precise evaluation of the roughness for the machined metal surfaces of the end mill cutting tool. The surface parameter database is established exhibiting an advantage over the traditional method. This study reveals a comparison methodology of the end mill surface parameters using both stylus readings and image processing software for widely used end mill cutting tools that have considerable effect on characterization of sensitive manufacturing surface of millings.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Machined surface roughness including cutter displacements in milling of hardened steel
Autorzy:
Wojciechowski, S.
Tematy:
milling
surface roughness
dynamics
hardened steel
scanning vibrometry
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/221781.pdf  Link otwiera się w nowym oknie
Opis:
The work presented here, concentrates on experimental surface roughness analysis in the milling of hardened steel using a monolithic torus mill. Machined surface roughness with respect to milling process dynamics has been investigated. The surface roughness model including cutter displacements has been developed. Cutting forces and cutter displacements (vibrations) were measured in order to estimate their quantitative influence on Ra and Rz parameters. The cutter displacements were measured online using a scanning 3D laser vibrometer. The influence of cutting speed νc on surface roughness parameters (Ra, Rz) was also studied. The research revealed that real surface roughness parameters are significantly higher than those calculated on the basis of a kinematic-geometric basic model, and their values are strongly dependent on dynamic cutter displacements.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A review on machinability in the milling processes
Autorzy:
Demirpolat, Havva
Kuntoğlu, Mustafa
Binali, Rüstem
Tematy:
milling process
cutting force
surface roughness
tool wear
Pokaż więcej
Wydawca:
Politechnika Opolska
Powiązania:
https://bibliotekanauki.pl/articles/34656168.pdf  Link otwiera się w nowym oknie
Opis:
This review paper focuses on the up-to-date machinability characteristics of milling processes such as cutting forces, surface roughness and tool wear and their impacts on the cutting mechanism. The methodology pur-sued in this paper is to analyze the previous research articles published between 2019–2022 classifying them into the subcategoriesthat usemill-ing operation as manufacturing strategy. As known, milling is one of the most used machining processes in industry and often applied for academic studiesforawide range of materials. Therefore, used sensor systems, main aim and the preferred methodology were summarized in the context of this paper. Seemingly, a great number of machinability papers have been published recently which focuses on the several types of engineering ma-terials and utilized various types of sensor system to improve the surface roughness and tool life. In addition, the investigation showed that optimi-zation approaches have been applied broadly to detect the best machining conditions. Also, it was observed that several modeling approaches such as finite element analysis is a good alternative to analyze the process.
Dostawca treści:
Biblioteka Nauki
Artykuł

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