Wyniki wyszukiwania - BazTech

1

Ocena szorstkości nawierzchni ciągów pieszo-rowerowych na przykładzie miasta Częstochowa

Kosiń M., Pietrzak A.

Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo

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2016

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Z. 22 (172)

142-148

PL

W artykule omówiono przykładowe rozwiązania konstrukcji ciągów pieszo-rowerowych na terenie miasta Częstochowa. Przedstawiano również dla wybranych nawierzchni badania odporności na poślizg jako podstawowy wskaźnik bezpieczeństwa rowerzystów i pieszych. Z przeprowadzonych badań wynika, że najlepszym wskaźnikiem szorstkości PTV, który mieści się w granicach 66,8÷67,8, charakteryzuje się nawierzchnia asfaltobetonowa.

EN

The article discusses examples of solutions construction of pedestrian-cycling in the city of Czestochowa. Presented for selected surfaces of resistance to slip, as the primary indicator of the safety of cyclists and pedestrians. The study shows that the best indicator of the roughness PTV, that in the range 66.8÷67.8, has a surface a asphalt concrete.

2

The experimental analysis of the burnishing process using the methods : NPS

Dyl T. C.

Journal of KONES

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2016

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Vol. 23, No. 1

107--113

EN

The paper presents selected results of experimental research of burnishing process of the steel tube holes. The ballizing process (NPS) is the method of burnishing where consists of pushing the tool through the hole, wherein the ball is greater in size than the opening of the value of the reduction ratio. Used tools to burnishing are hard and smooth surface. Burnishing elements are made of shape: ball, roll and disk. The ballizing process is carry out by a ball. The precise tube holes are made mostly methods abrasive machining. Machining these methods can usually maintain a within the tolerances established by the constructor size and shape and surface roughness. However, not achieved a satisfactory state surface layer of tube holes. Improve the properties of the surface layer can be obtained after application, as finishing, the slide burnishing. Modelling of the burnishing process using the method, NPS is to determine the impact of a specific curvature a rigid tool with of the workpiece. Ballizing process can increase the dimensional accuracy of tube holes, reducing the surface roughness, the strengthening of the surface layer, compressive residual stresses constitution. Compressive internal stresses substantially influence the fatigue life of machine parts. The aim of experimental research was to obtain surface layer state of compressive residual stress and the material ratio curve of convexity shape.

3

Porównanie rotorowych metod montażowych z klasycznymi

Oroń G., Galiński K.

Technologia i Automatyzacja Montażu

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2014

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nr 1

55--58

PL

Artykuł opisuje porównanie rotorowych i klasycznych metod montażowych. Na początku przedstawiono przykłady elementów montowanych. Elementy te mogą być montowane zarówno metodą klasyczną, jak i rotorową. W dalszej części artykułu opisano przykłady urządzeń realizujących montaż rotorowy. Na zakończenie porównano obie metody.

EN

The article describes a comparison of rotary and conventional methods of the assembly. In the first part of the text examples of feeder elements are described. These feeder elements can be assembled both by the conventional method and rotor method. The last part of this article describes examples of devices that perform rotor assembly and conventional assembly method. As a summary, the two methods are compared.

4

Effect of relative strain ratio on the reduce roughness surface layer tube holes after burnishing process

Dyl T.

Journal of KONES

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2012

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Vol. 19, No. 2

137-143

EN

Burnishing technology is a technology of surface plastic forming of machine parts. The paper presents experimental research of burnishing process of the steel tube holes. Used tools to burnishing technology are hard and smooth surface. Burnishing elements are of ball, roll and disk. Burnishing be flat surfaces, and cylindrical shape. Burnished surfaces are cylindrical outer and inner. Because of the type of the force can be divided into static and dynamic burnishing. Due to the kinematics can be divided into sliding and roller burnishing. Occurrence of moving parts in direct contact with the material qualifies for the group process of burnishing rolling. The sliding burnishing design element property is part of the work surface burnished permanently attached to the handle. Burnishing is used as a finishing strengthens and smoothness can be realized on the universal machine tools and machining centres, effectively replaces the machining operations, such as grinding, reaming, honing and lapping. The precise tube holes are made mostly methods abrasive machining. Machining these methods can usually maintain a within the tolerances established by the constructor size and shape and surface roughness. However, there is not achieved a satisfactory state surface layer of tube holes. Improve the properties of the surface layer can be obtained after application, as finishing, broaching the slide burnishing. It consists in pushing through the machined hole tool in the shape of a sphere or a special plunger mandrel. After burnishing broaching is increased diameter, reduced roughness surface and improve the physical properties work piece surface layer of the tube holes. Burnishing broaching process can increase the dimensional accuracy of tube holes, reducing the surface roughness, the strengthening of the surface layer, compressive residual stresses constitution. Compressive internal stresses substantially influence the fatigue life of machine parts. A burnishing broaching is carry out by a ball. In the paper presents results measurements roughness and impact of the relative strain ratio on the surface layer after burnishing broaching process.

5

Correlation Between Surface Roughness and Rheological Properties of Liquid Ductile Cast Iron

Borowiecki B., Sobiecka E.

Archives of Foundry Engineering

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2012

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Vol. 12, iss. 2s

5--8

EN

The investigation of filling process of ductile cast iron flow in sand mould was showed the correlation between casting roughness surface and rheological properties of metal. Evidently of castings surface roughness was state of distance, from a few to a dozen diameters of vertical channel inlet. The method of rod fluidity test permit to study of rheological properties of metal and the roughness surface of castings.

6

Wpływ parametrów obróbki metodą strumienia wodno-ściernego na chropowatość powierzchni - dobór modelu predykcyjnego określającego profil powierzchni przeciętej

Wala T.

Prace Naukowe Katedry Budowy Maszyn / Politechnika Śląska

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2008

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nr 3

177-188

PL

Artykuł przedstawia metodologię doboru parametrów cięcia w zależności od wymaganej jakości powierzchni obrabianej. We wstępnej analizie doboru warunków cięcia przedstawiono algorytm badań dla różnych sposobów uzyskania wyników wyjściowych. Główny kierunek badań niniejszego artykułu skierowany jest na opracowaniu modelu predykcyjnego wysokości chropowatości powierzchni obrobionej dla wybranych materiałów.

EN

The article shows the methodology of cutting parameters determination depending on required machined surface quality. The investigation algorithm of various ways of the output results obtaining during the preliminary analysis was showed. The main goal of this investigation was building the roughness predictive model of cutting surface, which depended on the AWJ parameters and workpiece.