STUDY ON THE INFLUENCE OF TEMPERATURE, VELOCITY AND SHAPE OF TOOLS ON THE COMBINED PROCESS OF EXTRUSION AND BROACHING OF THE DEEP SLEEVE WITH THE BOTTOM MADE OF THE AZ31 ALLOY

摘要

The article presents the results of a theoretical analysis of the manufacturing process of the deep sleeve with the bottom by means of a method of combining the indirect extrusion of a thick bush and broaching the blank through the conical die in one cycle of the stamp. The main advantage of application of the developed method for production of the sleeve is to reduce demand for energy and force compared to traditional methods of producing the deep sleeve. Moreover, the nature of the single operation of the extrusion process and extension of the sleeve eliminates the necessity of additional treatments: soft annealing, reheating the charge and reducing wall thickness of the sleeve by a second tool, which significantly reduce energy, labour and time consumption of production. Numerical calculations were performed in the Forge R 2D using plane state of strain and the obtained results allowed to determine the forces necessary for the process and the strain limit, as well as die geometry and impact velocity on the process tool.