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1
Content available Visual Testing of Castings Defects after Vibratory Machining
Bańkowski D., Młynarczyk P.
Archives of Foundry Engineering
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2020
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Vol. 20, iss. 4
72--76
EN
The paper presents an example of the application of vibratory machining for castings based on the results of visual testing. The purpose of the work is to popularize non-destructive testing and vibratory machining as finishing process, especially in the case of cast objects. Visual testing is one of the obligatory non-destructive tests used for castings and welded joints. The basic requirements concerning the dimensional accuracy and surface texture of cast components are not met if visible surface flaws are detected. The tested castings, which had characteristic traces of the casting process, were subjected to vibratory machining. The machining with loose abrasive media in vibrating containers is aimed at smoothing the surface and reducing or completely removing flashes. To complement the visual testing were also conducted research on the contact profilometer Taylor Hobson PGI 1200. Particular attention was focused on measuring the height of flashes and changes in the surface of smoothed details based on BNIF No. 359 touch-visual patterns. Based on the work, it can be concluded that vibratory machining allows for removal flashes and smoothing of the surface of aluminum alloy cast objects.
2
Content available Research on the Influence of Vibratory Machining on Titanium Alloys Properties
Bańkowski D., Spadło S.
Archives of Foundry Engineering
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2020
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Vol. 20, iss. 3
47--52
EN
This article proposes these of vibratory machining to Ti-6Al-4V titanium alloy as finishing treatment. Titanium alloy was used in the aerospace industry, military, metallurgical, automotive and medical processes, extreme sports and other. The three-level three-factor Box-Behnken experiment examined the influence of machining time of vibratory machining, the type of mass finishing media used and the initial state of the surface layer on the mass loss, geometric structure of the surface, micro hardness and the optimal process parameters were determined. Considerations were given the surfaces after milling, after cutting with a band saw and after the sanding process. The experiment used three types of mass finishing media: polyester, porcelain and metal. Duration of vibratory machining treatment was assumed to be 20, 40, 60 minutes. The form profiles before and after vibratory machining were determined with the Talysurf CCI Lite - Taylor Hobson optical profiler. Future tests should concern research to carry out tests using abrasive pastes with a larger granulation of abrasive grains, to carry out tests for longer processing times and to determine the time after which the parameters of geometrical structure of the surface change is unnoticeable.
3
Content available The Influence of Abrasive Paste on the Effects of Vibratory Machining of Brass
Bańkowski D., Spadło S.
Archives of Foundry Engineering
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2019
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iss. 4
5--10
EN
The article presents the results of research on the finishing of M63 Z4 brass by vibratory machining. Brass alloy was used for the research due to the common use of ammunition elements, cartridge case and good cold forming properties on the construction. Until now, the authors have not met with the results of research to determine the impact of abrasive pastes in container processing. It was found that the additive for container abrasive treatment of abrasive paste causes larger mass losses and faster surface smoothing effects. The treatment was carried out in two stages: in the first stage, the workpieces were deburred and then polished. Considerations were given to the impact of mass of workpieces, machining time and its type on mass loss and changes in the geometric structure of the surface. The surface roughness of machining samples was measured with the Talysurf CCI Lite optical profiler. The suggestions for future research may be to carry out tests using abrasive pastes with a larger granulation of abrasive grains, and to carry out tests for longer processing times and to determine the time after which the parameters of SGP change is unnoticeable.
4
Content available Vibratory Machining Effect on the Properties of the Aluminum Alloys Surface
Bańkowski D., Spadło S.
Archives of Foundry Engineering
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2017
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Vol. 17, iss. 4
19--24
EN
The article presents an example of finishing treatment for aluminum alloys with the use of vibration machining, with loose abrasive media in a closed tumbler. For the analysis of selected properties of the surface layer prepared flat samples of aluminum alloy PA6/2017 in the state after recrystallization. The samples in the first stage were subjected to a treatment of deburring using ceramic media. In a second step polishing process performed with a strengthening metal media. In addition, for comparative purposes was considered. only the case of metal polishing. The prepared samples were subjected to hardness tests and a tangential tensile test. As a result of finishing with vibratory machining, it was possible to remove burrs, flash, rounding sharp edges, smoothing and lightening the surface of objects made. The basic parameters of the surface geometry were obtained using the Talysurf CCI Lite - Taylor Hobson optical profiler. As a result of the tests it can be stated that the greatest reduction of surface roughness and mass loss occurs in the first minutes of the process. Mechanical tests have shown that the most advantageous high values of tensile strength and hardness are obtained with two-stage vibration treatment, - combination of deburring and polishing. Moreover the use of metal media resulted in the strengthening of the surface by pressure deburring with metal media.
5
Content available remote Analysis of the effect of processing vibro-abrasive finishing on the ammunition scales topography surface and sharp edges
Spadło S., Bańkowski D., Młynarczyk P.
Journal of Achievements in Materials and Manufacturing Engineering
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2014
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Vol. 66, nr 1
39--44
EN
Purpose: The paper presents a comparison of the effects the processing time vibro-abrasive deburring and polishing process on the structure of the geometric surface. There is also analyzed the relationship between the duration of the treatment on the quality of sharp edges. Design/methodology/approach: Following the tests, the surface roughness and waviness of the machined job were measured by using optical profilometer Talysurf CCI Lite - Taylor Hobson. To illustrate the surface taper ratio and edge optical microscope Nikon MA 200 Eclipse with the image analysis system NIS 4.20 was used. Smoothing vibratory was carried out on the machine SMR-D25, which is discussed in study. Findings: Two types of treatment were analyzed by using a vibro-abrasive deburring and polishing. The first vibratory process - dry deburring was performed by using ceramic media CB 0815 VH Series. The degree of aggressive of ceramic given by the manufacturer is 24%. The second process- the vibration-surface polishing was performed by using the fittings with white porcelain series EB 0610.The process was carried out by using liquid supportive Series ME L100 A22/NF. Research limitations/implications: Analysis of the vibration smoothing technology in terms of technical refers mainly to comparethe results of the geometric structure of the surface. Originality/value: The 3D analysis of the surface topography for all samples was carried out. Deburring and polishing processes were compared.
6
Content available remote The influence of vibrating processing on a variation of the chemical composition and properties of electrospark mattings on steel
Zaitseva N. V., Zakharov S. M., Shmatko O. A., Oborskyi I. L.
Scientific Problems of Machines Operation and Maintenance
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2010
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Vol. 45, nr 1
81-86
EN
In this work, the influence of preliminary vibration stress on the stabilisation of structure and properties of the surface layer of steel compounds with electric-spark coatings is presented.
7
Content available remote Sterowanie obróbką wibracyjną wałów długowymiarowych
Draczow A., Taranenko G., Taranenko W., Świć A., Hałas W.
Pomiary Automatyka Robotyka
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2009
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R. 13, nr 2
132-138
PL
W artykule analizowane są procesy dynamiczne przebiegające podczas obróbki wibracyjnej półfabrykatów o małej sztywności. Przedstawiono sposób sterowania parametrami technologicznymi umożliwiający identyfikację procesów relaksacji i uzyskanie odpowiednich parametrów geometrycznych półfabrykatu.
EN
The article is devoted to the problem of dynamic of the low-rigid work pieces by the affection vibration. The method of control of technological parameters to intensify of the stress relaxation and increasing of the part geometrical stability is substantiated.
8
Content available remote Sterowanie obróbką wibracyjną wałów o małej sztywności
Draczow O., Taranenko W., Hałas W., Taranenko G.
Pomiary Automatyka Robotyka
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2008
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R. 12, nr 2
224--227
PL
W artykule omówiono miejsce obróbki wibracyjnej wałów długowymiarowych o małej sztywności w procesie technologicznym i jej wpływ na niezawodność eksploatacyjną gotowych wyrobów. Wprowadzenie operacji obróbki wibracyjnej obniża poziom technologicznych naprężeń szczątkowych. Przedstawione metody sterowania obróbką wibracyjną oparte są na kontroli położenia stref nagrzania półfabrykatu, to znaczy miejsc relaksacji naprężeń. Zmiana technologicznych parametrów obróbki wibracyjnej pozwala na sterowanie stopniem przygotowania każdej części półfabrykatu wzdłuż jego osi co powoduje zmniejszenie odkształceń wałów w wyniku obniżenia technologicznych naprężeń szczątkowych.
EN
In the article talked over the place of vibratory processing the long dimension shafts about small stiffness in technological process and it’s influence on the exploational reliabity finished products. The introduction of the vibratory processing operation reduces the level of technological residual tensions. The introduced methods of control the vibratory processing are leaning on the control of the positions of the warming zones of semimanufactured products, it means the places of the tensions relaxation. The change of the technological parameters of the vibratory processing allows to control the degree of the preparation of every part of semimanufactured product along his axis what causes decrease of the shafts deformations in the result of the lowering of technological residual tensions.
9
Efektywne metody wzmocnienia powierzchni części maszyn oraz podwyższenie ich wytrzymałości.
Stotsko Z.
Prace Naukowe Instytutu Materiałoznawstwa i Mechaniki Technicznej Politechniki Wrocławskiej. Konferencje
|
2007
|
Vol. 65, nr 11
83-92
PL
Rozpatrywano sposób oraz urządzenia dynamicznego powierzchniowego wzmocnienia wyrobów prętowych o dużej długości z zastosowaniem metody wibracyjno-odśrodkowego wzmocnienia (WOW). Przedstawiono wyniki badań wpływu podstawowych parametrów technologicznych na wskaźniki jakości powierzchniowej warstwy materiału wyrobów.
EN
Methods and devices for surface dynamics hardening of cylindrical long-sized bar machine part by vibratory-centrifugal hardening are under consideration. Paremters of surface quality of treated itmes as function of main technological factors are obtained.
10
Content available remote Complex mathematical model and optimisation of vibration volumetric treatment for surfaces of machine parts
Stotsko Z. A., Sokil B. I., Topilnytskyy V. G.
Journal of Achievements in Materials and Manufacturing Engineering
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2007
|
Vol. 24, nr 1
283-290
EN
Purpose: The objective of this work is to develop the principles of the theoretical investigation of vibration volumetric treatment for the surfaces of articles manufactured by friable dry medium and to create the method for choice and optimization of machine parameters. Design/methodology/approach: Theoretical investigations are based on using the analytic methods of theory of non-linear oscillations and asymptotic methods of solving non-linear differential equations for describing dynamic processes of volumetric vibration treatment. Experimental investigations of dynamic processes that take place in the vibromachines were carried out with using the computer and vibration measuring system. Findings: Complex non-linear mathematic model of the system "vibromachine - treating medium" is created. Due to their non-linearity, models of such kind are adequate to real situation of vibrotreatment, they can also be applied in investigation of dynamics of the vibromachine and its medium. Research limitations/implications: Processes of vibration volumetric treatment need additional investigations. Practical implications: The obtained complex mathematical model of the system "vibromachine - trading medium" enables us to analytically determine the influence of its parameters upon the intensity of articles treatment in it according to the chosen criterion; thus it saves us from carrying out time taking cumbersome experiments both for designing a vibromachine and for selecting modes of treating articles in it. Originality/value: The new approach to the investigations of volumetric vibration treatment by means nonlinear mathematic model of the system "vibromachine - treating medium" have been shown.
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