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1
Content available remote Możliwość regulacji temperatury na stanowisku testowym do badania właściwości elastomerów
Stembalski M., Skoczyński W., Sandecki J., Roszkowski A., Preś P.
Mechanik
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2018
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R. 91, nr 12
1116--1119
PL
Przedstawiono system kontroli i utrzymania temperatury w zbiorniku wykorzystywanym do testów zmęczeniowych elementów. Zaprojektowany system umożliwia osiąganie i utrzymanie stałej temperatury w zakresie od 17 do 45ºC z odchyłką ±0,5ºC. System kontroli temperatury został skonstruowany z zastosowaniem ogniw Peltiera oraz układu sterowania Arduino Uno.
EN
The system of control and maintenance of temperature in the tank used for fatigue tests of the elements is presented. The designed system enables reaching and maintaining a constant temperature in the range from 17 to 45ºC with a slope of ±0.5ºC. The temperature control system was implemented using the Peltier cells and the Arduino Uno control system.
2
Content available remote Testing the vibration damping of a glass gatherer robot arm using a friction damper
Stembalski M., Skoczyński W., Roszkowski A., Preś P.
Archives of Civil and Mechanical Engineering
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2017
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Vol. 17, no. 2
240--248
EN
This paper describes a test stand along with a model of a lance used in glass works. A prototype friction damper was used for vibration damping of the lance. Experimental tests were conducted, whose aim was to determine operating conditions under which the damper will be the most effective. Damping was evaluated based on the damping decrement determined using the resonance curve for the first form of vibration of the lance. It was found that a friction damper has optimal values of preload force from the point of view of damping of the lance's resonant vibration.
3
Content available remote Zastosowanie czujnika optycznego ConoProbe MK 3.0 HD do pomiaru profilu powierzchni obrobionej
Preś P., Stembalski M., Turek P., Skoczyński W., Jankowski T.
Mechanik
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2016
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R. 89, nr 11
1688--1689
PL
Przedstawiono zastosowanie czujnika optycznego ConoProbe 3.0HD do szybkiego skanowania profilu 2D powierzchni wału po obróbce skrawaniem. Do przemieszczania głowicy pomiarowej wykorzystano napęd obrabiarki CNC. Zmierzony profil wykorzystano do oceny różnicy średnic tego wału oraz jego chropowatości. Zmierzone wartości odniesiono do wyników uzyskanych przy pomocy profilografometru firmy Taylor Hobson. W zależności od częstotliwości próbkowania sygnału badania wykazały rozbieżności rzędu 0,02 mm dla pomiaru średnicy wału oraz rozbieżności od 1 do 10 μm w ocenie chropowatości.
EN
Application of an optical sensor ConoProbe 3.0HD to quickly scan a 2D profile of the shaft after machining was described. The drive of CNC machine tool was employed to move the measuring head. The measured profile was used to assess the difference in diameters of the shaft and its roughness. The measured values were referred to the results obtained using profilographometer Taylor Hobson. Studies have shown differences in the shaft diameter assessment of the order of 0.02 mm, and in the assessment of roughness of 1 to 10 μm, depending on the sampling frequency.
4
Content available remote Problemy ustalania i aktywnej regulacji napięcia wstępnego łożysk skośnych w zespołach wrzecionowych obrabiarek
Turek P., Roszkowski A., Skoczyński W., Preś P.
Mechanik
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2014
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R. 87, nr 3
168--175
PL
Przedstawiono wpływ napięcia wstępnego na warunki pracy łożysk skośnych. Omówiono zależności zachodzące przy wzajemnych przemieszczeniach pierścieni łożysk odpowiednio do kąta działania łożyska skośnego. Przedstawiono kryteria podziału łożysk skośnych na nisko- i wysokoobrotowe. Zaprezentowano układy ich pracy „O” i „X”. Zestawiono i omówiono wybrane metody napinania łożysk skośnych – wskazano ich wady i zalety pod kątem aktywnej kontroli i sterowania układem w trakcie pracy.
EN
Shows the influence of preload on the working conditions of angular contact bearings. Depending discussed mutual displacements occurring at the bearing rings corresponding to the angle of the angular contact bearing activities. Presents the criteria for the distribution of angular contact bearings for low and high speed. Presented their work systems "O" and "X". Summarizes and discusses some methods of tensioning angular contact bearings - indicated their advantages and disadvantages in terms of active monitoring and control system during operation.
5
Content available remote Research and modeling workpiece edge formation process during orthogonal cutting
Preś P., Skoczyński W., Jaśkiewicz K.
Archives of Civil and Mechanical Engineering
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2014
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Vol. 14, no. 4
622--635
EN
This paper presented the study of the phenomenon of the material deformation at the edge of the workpiece during the orthogonal cutting of steel C45E and two-dimensional model of this process, developed with using the Finite Element Method. Based on the user's procedure VUMAT, the Johnson–Cook's law and Ductile Damage model were applied to describe the machined material. An extensive verification of the modeled process was performed. The phenomenon of material deformation at the edge of the workpiece during the actual orthogonal cutting process was recorded using a high speed camera. The courses of the real phenomenon with the modeled one were compared. The components of the resultant cutting force were measured during orthogonal cutting for different machining parameters. The measurement results were compared with the values of the components of the resultant cutting force calculated on the basis of numerical simulation. The studies on the burr formation mechanism were performed. The contactless measurement of selected geometric features of the burr was performed. The results of measurements of the selected geometric features of burrs obtained from the experiment were compared with those compiled based on FEM simulation.
6
Content available remote Determination of the friction coefficient as a function of sliding speed and normal pressure for steel C45 and steel 40HM
Stembalski M., Preś P., Skoczyński W.
Archives of Civil and Mechanical Engineering
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2013
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Vol. 13, no. 4
444--448
EN
This paper presents a method of determining the coefficient of friction as a function of sliding speed and normal pressure for different friction pairs of materials used in friction dampers. A schematic of the experimental setup is shown and the course of the experiment is described. An analytical relation describing the influence of sliding speed and normal pressure on the friction coefficient for C45 and 40HM steel was derived. Then on the basis of the analytical relation 3D numerical models were created. Computations using the Abaqus/Standard software package were performed.
7
Content available remote Badania eksperymentalne i modelowanie numeryczne mechanizmu odkształcenia materiału na krawędzi przedmiotu obrabianego
Preś P, Skoczyński W, Stembalski M
Mechanik
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2012
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R. 85, nr 8-9CD (SOS)
242--248
8
Content available Modelled phenomenon of burr formation during machining
Preś P., Skoczyński W.
Journal of KONES
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2012
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Vol. 19, No. 1
333-338
EN
A model of burr formation on the edge of the workpiece in the course of machining is presented. The material being machined, the cutting tool and the machining parameters were modelled. Material properties and type of its deformations have been modelled with the use of a constitutive Johnson - Cook model. Material damage initiation criteria and associated damage evolution have been modelled with the use of the ductile damage and the Johnson- Cook damage initiation criterion. Simulations of the machining process for different depths of cut were carried out. The real burr formation presented by Hashimura was compared with the modelled one. The influence of the cutting parameters on the form and size of burr has been analysed. Calculations have been realised utilising finite element method with the use of nonlinear analysis in ABAQUS/Explicit environment. Based on simulation results, the assessment of the form and size of burr has been made. Burr height was used to evaluate its size, which was derived according to ISO 13715 standard. The goal was to obtain a model that reliably reflects the behaviour of material during machining, with particular emphasis on supporting the creation of cutting phenomenon of burr formation. The results of simulation and computational analysis confirmed that the model reflects the real behaviour of the material.
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