Design of cold extrusion processes based on energy calculation modules
DOI:
https://doi.org/10.37142/2076-2151/2020-1(50)125Keywords:
cold extrusion, process design, energy upper bound method, kinematic module, shaping of parts.Abstract
Hrudkina N. S., Aliieva L. I., Malii Kh. V. Design of cold extrusion processes based on energy calculation modules. Material working by pressure. 2020. № 1 (50). - Р. 125-129.
We consider the possibilities of the energy upper bound method in terms of using computational modules in the design of cold extrusion processes. We carried out the classification of kinematic modules according to various parameters and properties which will contribute to their more rational use at the stage of constructing calculation schemes of processes. We identified kinematic modules in terms of the rigidity of combination with adjacent kinematic modules and the possibility of variation (in the shape of the curve of the inclined boundary or the angle of inclination) and location according to the developed design scheme. We determined the features of the use of kinematic modules of complex configuration in combination with various adjacent modules. For the process of sequential combined radial-direct extrusion, we took into account the rationality of replacing a rectangular axial module with a triangular one with a curved boundary. In the future, it is recommended to use this replacement for processes with the transition from straight (in the axial part) to radial extrusion. On the basis of previously performed studies of the combined radial-reverse extrusion process, we developed software for selecting the components of the design scheme. This software product allows you to predict the shaping of the part, the reduced deformation pressure with the determination of the optimal metal outflow rate in the vertical direction. We took in to account recommendations on the choice of the design scheme based on on the deformation zone and the geometric relationships of this deformation process. Thus, the possibilities of using modules based on the energy method in the design of cold extrusion processes have been demonstrated. This will facilitate the determination of the optimal parameters of the tool configuration and the development of appropriate design and technological recommendations.
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