Mathematical modelling of joint reliability indicators taking into account complex formation of surface quality metrics and physical and mechanical properties of functional surface materials

Abstract

The article deals with the problems of engineering support of the main indicators of reliability (durability) for the shape elements of molds. The influence of geometric, physico-mechanical, and physico-chemical parameters of surface quality on the formation of the required service characteristics of mating parts that ensure the established operating time of the product for failure is studied. The results of the influence of ion-plasma treatment on the structure and phase composition are presented: 1.2344 and 1.2379 tool steels (DIN). It is evaluated that the glow discharge treatment leads to the erosion of the fingerprints, appearing in the process of nitriding of this type of steel and it also causes thickening of defects in the matrix phase α-Fe together with fine grading CrN, as well as the dispersion of carbide inclusions and their uniform distribution in the surface layer to a depth of up to 80 microns, resulting in the increase of the microhardness of the surface by 15 - 18 %.

Engineering support of mating surfaces operational properties in the compound forming tool elements with regard to specified pressmold life

“…Обеспечение точности расположения каждого звена в составе формообразующей Таким образом, технологическое обеспечение требуемых точности и качества формообразующей оснастки пресс-форм для сборочных операций с учетом влияния контактной жесткости и корректировкой параметров обработки и предельных отклонений при проектировании с последующим снижением трудоемкости выполненных работ является актуальной задачей [3].…”