The Researching of Dynamic Electricity Distribution Along with the Renovation of Automobile Details by the Contact Covering Welding
| Autor: | Mykhailo Krasota, Ruslan Osin, Yuriy Kuleshkov, Timofey Rudenko |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | National Interagency Scientific and Technical Collection of Works. Design, Production and Exploitation of Agricultural Machines. :173-181 |
| ISSN: | 2664-9136 2414-3820 |
| DOI: | 10.32515/2414-3820.2020.50.173-181 |
| Popis: | The goal of completed research is determination of common factors of dynamic electricity distribution in the area of simple welding spot forming due to contact welding-on compact and powdered materials. Due to contact welding-on of compact (rod, belt) and powdered materials there is the dissimilarity of an electric field, which determines the unequal distribution of temperature field in the area of the moulded core creating and influence on the welded on covering quality. By the contact welding-on of compact materials, there is an occurrence of central core zone unheating, which is coming as a result of geometrical, temperature and magnetic-electric factors. During contact welding of metal powders, considering high speed of heating and a small-time of dynamic electricity passage through powder, it is possible to make a conclusion, that the stability of heat generation in a powder surface will be determined by starting electricity resistance value. High-quality plating can be reached if the powder charge will have low and stable electricity resistance in a cross-section and good compactness under the condition of low compress pressure, which is used for welding. (40 ... 70 MPa). Electrical field dissimilarity with contact welding-on powdered materials leads to unequal heating of powdered materials and covering defects, which is taking place due to the features of powder compression. As a result of current lines concoction in the central area is observed at a local temperature increase. Besides, interstices are dielectrical phase and increase electrical resistance in the peripheral areas. To increase the quality of coverings, got by contact welding-on is able due to providing high-quality powder material compression on the whole covering cut. |
| Databáze: | OpenAIRE |
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