Simulation-analytical analysis of the influence of technological factors on the stress-strain behavior of functional surfaces of mold parts

Abstract

In contemporary mechanical engineering, manufacturing various parts of dies, molds, etc., is particularly challenging. This is due to some factors, including the high precision of the components, the low roughness of their functional surfaces, significant temperature fluctuations during operation, the complex nature of the materials used in these parts, and the high frequency and intensity of the cyclic and alternating thermal and power loads. To demonstrate the advantages of the effectiveness of functionally oriented technological design, the object of research for adequacy is the formation of design technological solutions at the level of route-operational technology for manufacturing mold ejectors. During operation, this particular structural element is subject to intensive wear and alternating power and thermal loads, which, in combination, can cause a loss of functionality of the mold as a whole. Consequently, ejectors’ most significant operational properties are wear resistance, contact stiffness, and fatigue strength. The properties above are contingent on various surface quality indicators, including but not limited to the microtopology of functional surfaces, microhardness (surface layer hardness), residual stresses and strains, and their nature and depth. The quality indicators of the working surface are primarily established during the final stage of the ejector manufacturing process, encompassing finishing and finishing operations. The article undertakes an analysis of the implementation of two variants of the route for machining the most accurate cylindrical surfaces of ejectors at the finishing operation: namely, finishing grinding with an abrasive wheel and fine turning with a blade tool with a CNB-based composite insert of CB7025.