Resumen
The subject of the study in the article is the increasing requirements for working parameters and product quality. In instrument-making, mechanical engineering, defense and other industries manufactured products are composed of welded metal structure. Manufacture of these products requires the use of a large number of assembly and welding devices. The cost of labor intensity on design and manufacture of assembly and welding equipment reach 20-25% of the total labor intensity of manufacturing the product itself. One of the effective ways to reduce material and labor costs is to increase its durability and reliability. Taking into account the special conditions of use of this equipment (the presence of welding splashes), the durability of its operation depends on the methods of protection of the working surfaces of the equipment. The goal is to develop technological methods for increasing the life of the assembly and welding equipment based on studies of the reliability and durability of protective coatings that protect the working surfaces of devices, taking into account the impact of a set of technological factors. Objectives: to study the operating conditions of the assembly and welding equipment in order to determine the main factors that determine the reliability and durability of the equipment, determine the failures in the process of operation; investigation of the reliability of existing protective equipment in order to determine the direction of development of the optimum coating composition, the development of the optimal composition of the protective coating, resistant to the influence of welding splashes and wear during mechanical friction of the structural elements relative to the surfaces of the equipment. The following results were obtained. The article presents the research data of the authors of existing means of protection of surfaces of assembly and welding devices, the classifier of the main factors influencing reliability and durability of assembly and welding equipment and the classifier of failures in the course of equipment operation are developed. Conclusions: A methodology for determining the stability of protective coatings against the influence of welding splashes and mechanical movement of elements of welded structure has been developed.