Research on the Development of the Welding Reconditioning Procedure for Friction Liner on the Passenger Coaches

Abstract:

SNTFC CFR SA owns a fleet of 841 passenger coaches, which it maintains through usual overhauls and repairs at high safety levels provided by the national railway regulations and instructions. One of the most important systems of a wagon is the braking system. One part of this system is also the friction liner, its role being to support the friction gasket that applies the braking force on the brake disc. This friction liner is made of cast iron and is a component included in risk class 1A, according to OMT 290/2000, with a service life of 10 years. Depending on the degree of wear and safety in operation, one may decide to replace it with a new part or intervention to return to the initial dimensional shape. Considering the importance of this friction liner, a very precise analysis must be performed, and this should show the steps necessary to reintroduce the part into operation. The performed analysis is a welding reconditioning procedure, which must be applied with precision. The paper indicates all the stages and results we looked for by applying a reconditioning procedure for the particular situation of using the welding process by means of tables / graphs and of results obtained as of detailed works.

• Periodical: Advances in Science and Technology (Volume 110)
• Pages: 15-24
• DOI: https://doi.org/10.4028/www.scientific.net/AST.110.15
• Online since: September 2021
• Authors: Carmen Popisteanu*, Dumitru Titi Cicic, Gheorhe Solomon
• Keywords: Friction Lining, Railway Industry, Welding Reconditioning

References

[1] UIC Code 541-3 OR Brakes -Disc Brakes and their application-General conditions for the approval of brake pads.

[2] UIC Code 546 OR Freins a haute puissance pour trains de voyageurs.

[3] Petrescu C., Solomon Ghe, Cicic DT Risk management of friction liner welding reconditioning technology change.

DOI: 10.1088/1757-899x/916/1/012084

[4] https://www.codexalimentarius.ro/item/498-cum-se-realizeaza-un-flux-tehnologic.html.

[5] Dumitru G. M., Radu C., Dumitru B. - Reconditioning and repairing products, Printech Publishing House, Bucharest, (2010).

[6] Petrescu C., Solomon Ghe, Cicic DT, Chivu OR, Rontescu C. The recovery through welding of the geometric shape on passenger railcars friction liner, Journal of Research and Innovation for Sustainable Society (JRISS) Volume 2, Issue 1, 2020 ISSN: 2668-0416 Thoth Publishing House, (2020).

DOI: 10.33727/jriss.2020.1.5:32-40

[7] Dumitru Titi Cicic, Gabriel Iacobescu - Informatizarea şi optimizarea proceselor de sudare,, Editura Politehnica Press, Recunoscută CNCSIS, cod 19, ISBN 978-606-515-577-0, pag. 181, (2014).