Investigation of the process of deformation of large-sized forgings by profiled tools

Abstract

Zhbankov I. G., Aliiev I. S., Tahan L. V. Investigation of the process of deformation of large-sized forgings by profiled tools. Material working by pressure. 2020. № 1 (50). Р. 83-90.

Was established that the study of the large-sized forgings deformation process and the determination of the rational parameters of the forging tool is relevant for modern metallurgical industry. Theoretical studies were carried out using the finite element method. Verification of theoretical data is carried out on the basis of experimental and laboratory studies. The rational tools for manufacturing forgings as plates by open die forging process are flat plates with bevel. Based on finite element method was made the simulation of open die forging process the billet from steel 38ХНМ by the flat dies with bevel. Established that dimensions of the bevel on die and forging regime has significant influence on stress-strain state of billet. The simulation results helped to determine the optimal parameters of tools for forging such products as plates with the minimal deviations of shape and minimal possibility of surface crack formation. Thus the recommended dimensions of tools are the dies with bevel with slant 10–15⁰ and relative length 0.35–0.45. This allows obtain the minimal values of the shape defects such as waviness. Also the tools parameters described above allow obtaining optimal stress-strain state of the billet and minimizing the likelihood of surface cracking.