Energy analysis of waste-free exrusion of bushing type parts
DOI:
https://doi.org/10.37142/2076-2151/2020-1(50)38Keywords:
bush, sequentially flashing, the center of deformation, reduced pressure, angle of a punch conicity.Abstract
Bondareva E. N., Kordenko M. J., Moiseeva A. M. Energy analysis of waste-free exrusion of bushing type parts. Material working by pressure. 2020. № 1 (50). Р. 38-44.
The analysis of manufacturing ways of details such as bush is carried out. The necessity of studying waste-free stamping processes of details such as bush, in particular process of sequentially flashing is defined. The power regime analysis of the sequentially flashing process by the method of upper estimation is carried out. The optimal angle of the punch end taper, the deformation center size of the process is determined. The calculation formulas are given: the reduced pressure at different schemes of the deformation center partition; the optimal taper angle of the punch end and the size of the deformation cell during sequentially flashing. The influence of the optimal taper angle, the deformation degree, the friction coefficient and the breaking scheme of the deformation center on the reduced process pressure is revealed. Recommendations are given for the use of the angle of the punch end taper at different deformation degrees and the optimal number of rigid blocks when breaking the deformation center of the sequentially flashing at a certain deformation degree. The difference between the reduced process pressure when using the optimal taper angle and the angle recommended in the literature. A study of the process of stamping parts such as bush by the finite element method is carried out. The stages of the sequentially flashing process are established. The cyclic nature of the change in specific pressure in the sequentially flashing process is explained. The difference between the maximum and minimum value of specific pressure in the stamping process is established. The dependence of the specific pressure on the degree of deformation during sequentially flashing is established. A comparative analysis of the calculation results of the reduced pressure of sequentially flashing reduced pressure by the method of upper evaluation and the method of finite elements.
