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    Wyświetlanie 1-6 z 6
    Tytuł:
    ClinchRivet as an alternative method to resistance spot welding
    Autorzy:
    Kaščák, L.
    Spišák, E
    Mucha, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/387496.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    car body sheets
    spot welding
    tensile test
    microhardness
    blachy karoseryjne
    zgrzewanie punktowe
    próba rozciągania
    Opis:
    Various materials are used in car body production which are not always possible to join by conventional joining methods such as resistance spot welding. Therefore ClinchRivet method seem to be possible alternative. The paper deals with evaluation of properties of the joints made by mechanical joining method – ClinchRivet. The joint is made with the using of a special rivet, which is pushed into the joined materials by the flat punch. Following materials were used for joining of this method: DX51D+Z and H220PD steel sheets. The ten-sile test for observing the carrying capacities and metallographicall analysis were used for the evaluation of joint properties. Some results of the tests of ClinchRivet joints were compared to the properties of the joints made by resistance spot welding.
    Źródło:
    Acta Mechanica et Automatica; 2013, 7, 2; 79-82
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Joining the combination of AHSS steel and HSLA steel by resistance spot welding
    Autorzy:
    Kaščák, L.
    Spišák, E.
    Gajdoš, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/387551.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    car body sheets
    spot welding
    tensile test
    microhardness
    blachy karoseryjne
    zgrzewanie punktowe
    próba rozciągania
    Opis:
    The paper deals with the optimization of parameters of resistance spot welding and quality analysis of welded joints made by combination of galvanized Advanced High Strength Steel and High Strength Low Alloy steel. It is an advanced material combination uti-lized in automotive industry to reduce weight of the vehicle body and consequently lowering the fuel consumption to achieve the lowest possible fuel consumption, high active and passive safety of passengers while decreasing the amount of emission. The quality of welded joints was evaluated by destructive tests and non-destructive tests. The shear tensile test according to STN 05 1122 standard was used. Some samples were prepared for metallographic analysis, where the influence of the welding parameters on the structure of welded joint and occurrence of pores in the weld metal caused by evaporation of zinc from the coating was observed.
    Źródło:
    Acta Mechanica et Automatica; 2013, 7, 2; 75-78
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Observations from the Analysis of Searching Peak of Tension Test (SPOT) Charts
    Autorzy:
    Jaworski, Ryszard
    Powiązania:
    https://bibliotekanauki.pl/articles/523317.pdf
    Data publikacji:
    2015-03-01
    Wydawca:
    Krakowska Akademia im. Andrzeja Frycza Modrzewskiego
    Tematy:
    Peak of Tension Test (POT)
    Searching Peak of Tension (SPOT)
    Źródło:
    European Polygraph; 2015, 9, 1; 25-52
    1898-5238
    2380-0550
    Pojawia się w:
    European Polygraph
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Welding Current on Tensile-Peel Loading of Welding Joints in TRIP 800 and Micro-Alloyed Steels in Resistance Spot Welding
    Autorzy:
    Onar, V.
    Aslanlar, S.
    Akkaş, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031462.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    resistance spot welding
    welded joint
    automotive steels
    tensile-peel test
    Opis:
    In this paper, an analysis of electric resistance spot welding between micro-alloyed steel sheets having 1 mm thickness and TRIP 800 (transformation induced plasticity) steel sheets having 1.5 mm thickness was made. Couples of steel sheets are used in automobile industry. Steel pairs were joined by using resistance spot welding as overlap joint. A timer and current controlled resistance spot welding machine had pneumatic application mechanism and 120 kVA capacity. Preparation of specimens by spot welding was performed using different cycles ranging from 5 to 30 cycle and welding currents ranging from 8.5 to 16.5 kA by rise of 0.5 kA. The electrode force was kept constant at 6 kN. The prepared welding specimens were exposed to tensile-peel tests and the obtained results were supported by diagrams. Finally, appropriate welding parameters were advised to the users.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 822-824
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problemy kompatybilności rop naftowych
    Crude oil compatibility problems
    Autorzy:
    Krasodomski, Wojciech
    Altkorn, Beata
    Duda, Anna
    Szuflita, Sławomir
    Krasodomski, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/1834263.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Nafty i Gazu - Państwowy Instytut Badawczy
    Tematy:
    ropa naftowa
    kompatybilność
    test plamkowy
    p-value
    równoważnik ksylenowy
    liczba nierozpuszczalności
    liczba rozpuszczalności
    crude oil
    compatibility
    spot test
    xylene equivalent
    Insolubility Number
    Solubility Blending Number
    Opis:
    Crude oil processed in refineries is a complex mixture of hydrocarbons in which some heteroorganic compounds are dissolved or suspended. These types of systems are usually characterized by some instability, associated with precipitation of multiphase structures depending on the chemical nature of the oil components. These phenomena affect the proper course of refinery processes. The formed suspensions, and consequently sediments, associated with a change in the chemical nature of the matrix (mixtures of hydrocarbons derived from petroleum), can block the refinery infrastructure – tanks and pipelines – as well as heat exchangers. These deposits can be transferred to the liquid phase only by increasing matrix polarity. Therefore, to prevent thermally irreversible peptization and sedimentation of asphaltene – resin structures and aggregates, it is necessary to assess the compatibility of processed oil as precisely as possible. When composing the charge, it is necessary to assess and test the compatibility of mixed crude oils. This work summarizes information on both the practical and the theoretical aspects of crude oil compatibility. The principles of petroleum classification, contemporary views on the construction of colloidal structures suspended in a hydrocarbon environment, theoretical basis of knowledge about the properties of hydrocarbons as solvents were discussed, and the techniques and methods used to assess the compatibility of petroleum raw materials were analyzed. Blotter tests are presented, from the simplest spot test, originally developed for testing the presence of insoluble particles in asphalt and its variants, to automated methods (the PORLA analyzer). Parameters characterizing compatibility are compared, the method of determining parameters such as the p-value, the xylene equivalent or the Heithaus coefficients and their use is presented. The article also discusses other parameters describing the petroleum compatibility model and their components, such as solubility parameters, defined as the Insolubility Number (IN), which is also a measure of the solubility of the asphaltenes, and the solubility blending number Solubility Blending Number (SBN), determining the oil’s ability to dissolve asphaltenes.
    Źródło:
    Nafta-Gaz; 2020, 76, 5; 332-339
    0867-8871
    Pojawia się w:
    Nafta-Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Joining the High-Strength Steel Sheets Used in Car Body Production
    Autorzy:
    Kaščák, Ľuboš
    Cmorej, Denis
    Spišák, Emil
    Slota, Ján
    Powiązania:
    https://bibliotekanauki.pl/articles/2024185.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    clinching
    resistance spot welding
    tensile test
    metallography
    HCT600X+ZF
    HCT600X+Z
    HX420LAD+Z
    klinczowanie
    zgrzewanie punktowe
    próba rozciągania
    metalografia
    Opis:
    Nowadays, there are several important reasons for using high-strength sheets in the manufacturing of car bodies. Car manufacturers choose the steel with good formability, fatigue resistance and ability to absorb impact energy. Microalloyed steels and dual-phase steels are the materials which fulfil the above-mentioned criteria. The application of high-strength sheets has led to the development of new materials joining techniques. Mechanical joining, such as clinching, is the innovative technique to join these progressive materials. Materials of different thicknesses can be joined by clinching. The paper focuses on the comparison of the properties of the joints made by clinching and resistance spot welding. The application of resistance spot welding is still the most used joining method in car body production. These properties were investigated by tensile test and metallographic observation. The HCT600X+ZF, HCT600X+Z and HX420LAD+Z steel sheets were used for the experiments. The results of tensile test show that the values of load-bearing capacity of clinched joints reached from 3900 N to 5900 N and the resistance spot welded joints reached the values of load-bearing capacity from 12000 N to 19500 N. In comparison to the resistance spot welded joints, the clinched joints reached from 32 to 48% of load-bearing capacity.
    Źródło:
    Advances in Science and Technology. Research Journal; 2021, 15, 1; 184-196
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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