Examination of the cross-section shape of tram frogs

Abstract

Abstract: The article refers to the problem of trams derailing when crossing the crossing frogs. The structural difference of tram frogs in relation to railway frogs is presented. The causes of the phenomenon of underestimating the need to monitor the wear of tram frogs were defined. National regulations governing the design, construction and maintenance of tram frogs have been reviewed and compared with the corresponding regulations for rail infrastructure. A review of the measurement methods and measuring devices used in the field of wear analysis of steel elements of rail surfaces was carried out, with particular emphasis on the latest technologies. Three selected examples of tests of tram frogs, differing in the measuring equipment used, are presented. In the summary, conclusions from the conducted research and analyzes were formulated. Keywords: Tram tracks; Diagnostics; Frogs