Ensuring the Technological Parameters of Cast Block Crankcase of Automobile’s Diesel Engine

Abstract

The relevance of computer-integrated technologies for manufacturing parts is significant in the world . The purpose of this work is to analyze the quality of cast block crankcase using a universal technology of complex computer-integrated design of cast parts of internal combustion engines using engineering modeling of thermal and hydrodynamic parameters of casting . The results of computer-engineering modeling of thermal and hydrodynamic processes of block crankcase casting have shown that gas-shrinkage defects can be stress concentrators in the part’s structural elements. Therefore, they can affect the strength characteristics during operation. The developed 3D model of block crankcase casting with a technological gating-feeding system allowed creating a finite-difference model of casting and tooling and performing engineering modeling of casting processes in the ICS NovaFlow. The analysis of physical features of the processes of filling and cooling the castings in the mold was performed for the cast block crankcase of 4DTNA1 automobile diesel, the locations and sizes of gas-shrinkable defects were determined according to the Niyama criterion. The research results allowed us to form boundary and initial conditions for modeling the stress-strain state of the block crankcase in the places of gas-shrink porosity formation. Further development of the above studies will be carried out for castings of new types, configurations, other casting technologies, newly synthesized alloys.