Proces modeliranja sekvencijalne radijalno-direktne ekstruzije korišćenjem zakrivljenog trouglastog kinematičkog modula

Natalia Hrudkina

doi:10.5937/fme2101056h

Abstract

In this article new engineering calculations such as the value of the relative strain pressure for the combination of a triangular kinematic module with external modules of various configurations are developed. This allowed us to describe qualitatively the nature of the metal flow in the reversal zone before radial extrusion. This made it possible to achieve a decrease in the predicted assessment of the power mode for the deformation process with comparison by the use of rectangular modules. The greatest reduction in the value of the relative strain pressure corresponded to a combination with an adjacent rectangular module (with the missing vertical component CPVF) and can obtain 7-8%. The deviation of the theoretical results in the power parameters of the process by using a triangular kinematic module are 12-15% for a process with a developed flow radial component. The resulting calculations can be used to model new cold extrusion processes.

Highlights

The diversity of material processing methods allows choosing the most effective method that will ensure high cost-effectiveness of the process and the quality of manufactured parts [1,2,3,4]
In this article new engineering calculations of the value of the reduced strain pressure for the combination of a triangular kinematic module with external modules of various configurations are developed. This triangular module with an inclined curved boundary is proposed as an alternative to the elementary rectangular axial module. This allowed us to describe the nature of the metal flow in the reversal zone before radial extrusion, which corresponds to the picture of the curvature of the dividing grid in the process of sequential radial-direct extrusion with distribution
The article analyzes the features of using a triangular kinematic module with an adjacent external module of different configurations

Summary

INTRODUCTION

The diversity of material processing methods allows choosing the most effective method that will ensure high cost-effectiveness of the process and the quality of manufactured parts [1,2,3,4]. FME Transactions (2021) 49, 56-63 56 analytical dependencies of the force mode of deformation and features of forming in the processes of combined radial-reverse extrusion are demonstrated in the works [5, 15, 19, 20] These studies used the kinematic element method to calculate the value of the reduced strain pressure as the total value for the components of unified modules of rectangular, triangular and trapezoidal shapes. Within the framework of using the energy method for evaluating the power mode of the process, there are needs for the development of new kinematic modules with inclined boundaries This will allow us to describe a complex picture of the interface between the metal flow inside the workpiece in the zone of reversal to the radial flow and at the boundary between the workpiece and the tool. FME Transactions general recommendations on the features and rationality (in comparison with the simplest kinematic modules of rectangular shape) of using kinematic modules of complex shape with inclined borders and their embeddability in new computing schemes

PRESENTATION OF THE MAIN MATERIAL

Aπσ SV0 α3

CONCLUSIONS