Contact wire and methods for its manufacture
DOI:
https://doi.org/10.37142/2076-2151/2019-2(49)177Keywords:
copper; copper alloys; reinforced electrical contact wire; Conform-process.Abstract
Fedorinov V. A., Fedorinov M. V., Kulik A. N., Kokh A. K. Contact wire and methods for its manufacture // Material working by pressure. – 2019. – № 2 (49). - С. 177-188.
The results of a patent and literature review of the design and methods for making an electrical contact wire designed to transmit electric energy to rolling stock of railways and electrified municipal transport are presented. Methods of manufacturing a contact wire are largely dependent on its design. Three main types of contact wires can be distinguished. These include: wire from a homogeneous metal or alloy based on it; a metal wire that has a variable chemical composition, varying, for example, from the chemical composition of copper to the chemical composition of an alloy based on it or with a variable structure; reinforced wire, obviously heterogeneous in cross section, consisting of a steel core and a copper (sometimes aluminum) shell. It has been established that the most acceptable solution to the problem of increasing the strength characteristics of the wire, especially for railways, is the option of obtaining a reinforced (bimetallic) wire, inside which there is a core made of durable for example, steel. Conform technology provides great opportunities in this direction. New methods and equipment for the production of reinforced suspended contact (cart) wire based on the Conform process are described, based on the conformal coating of preheated steel wire with copper or a copper alloy of any composition by continuous pressing (extrusion). It turned out that, along with ensuring high strength characteristics of the contact wire with a nominal cross section of 85 mm2, copper savings due to its replacement with steel wire conductors per 1000 meters of finished reinforced contact wire is 143 kg, and the wire weight is reduced by 16 kg.
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