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Some aspects of launching the production of spring clips for rail fastenings
Abstract
Modern technology of hardware production occupies an important place in ensuring the fabrication of metal products for various industries. Production of steel rail fastening elements, such as spring-loaded clips, which play a significant role in improving the efficiency and safety of rail transport, is an important application of such technology. These products are characterized by complex shape, high quality requirements, as well as high level of physical, mechanical and performance properties. OJSC "MMK-METIZ" is one of the leading Russian companies producing railway hardware. Currently, to maintain its position in the market of rail fasteners, the company implemented a number of research, development and engineering works in the field of organization of production of bar-shaped spring clips OP-105 and ZhBR. As a result of these works, the required level of quality of the finished products has been achieved, allowing the use of manufactured spring clips on the railways of Russia.
... Производство рельсовой клеммы несколько отличается от технологии изготовления других видов пружинных изделий как по содержанию операций, так и точности соблюдения основных параметров производства. Технологический процесс изготовления пружинных изделий в большинстве случаев включает подготовку исходного металла: формообразование пружины, отделку заготовок и термообработку [1][2][3][4][5]. ...
The paper objective is to develop a domestic quenching oil for hardening spring clips. The study results of the effect of quenching liquid cooling properties on 40C2 steel hardness are presented. Domestic quenching oil Rosoil-277, an analog of the imported oil Isorapid 277 (PETROFER Germany) is made - for quenching rail clips. The tests were carried out at the installation to determine the cooling characteristics of technological and quenching media. A water-polymer quenching liquid is selected as a substitute for quenching oil. The results of hardness measurements on 40C2 steel workpieces showed that quenching in Rosoil-52 water-polymer quenching liquid gives higher hardness values compared with quenching in Rosoil-277 oil.
... С точки зрения производства, гнутые пружины, как правило, относятся к изделиям сложной формы с жестко регламентированной геометрией и особыми требованиями по механическим свойствам и эксплуатационным характеристикам. Примером таких изделий являются прутковые пружинные клеммы для рельсовых скреплений различных типов [1,2], разнообразные скобы, фиксаторы и т. п. ...
The study presents a comparative analysis of consumer properties of platinit by different producers. Both the products of Russian companies and the foreign counterparts are considered. It was established that the domestic platinit, though not very different in composition from its foreign analogues, is still inferior to them in its parameters, such as physical and technological properties, as well as surface quality.
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