Modeling the process of radial-direct extrusion with expansion using a triangular kinematic module

Hrudkina, Natalia; Aliievа, Leila; Марков, Олег; Kartamyshev, Dmytro; Shevtsov, Serhii; Kuznetsov, Mykola

doi:10.15587/1729-4061.2020.203989

Cited by 5 publications

(12 citation statements)

References 15 publications

(25 reference statements)

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“…Also, it should be noted that that there are low-deformed zones that are concentrated on the outer surface of the cup wall, in the internal axial zones of the branch piece and in the peripheral zone of the flange. In addition, the picture of gradual change in the deformed state during the combined three-direction extrusion confirms the presence of the rigid zone, the height of which decreases during the deformation [22]. At the same time, the heights of these deformation zones practically do not change during the process, which is achieved due to the expenditure of metal in the intermediate hard zone (Fig.…”

Section: Figure 1 the Comparison Of Deformation Force Diagrams For Various Combined Extrusion Schemes (Aluminium Alloy Al99)mentioning

confidence: 53%

“…1) obtained by simulating various options for combining extrusion schemes confirmed the significant decrease in power parameters during threedirection extrusion. Although at the initial stage of the process the increasing curves for extrusion forces during two-direction (radial-forward) and three-direction processes almost coincide [22].…”

Section: Experimental Research and Finite Ele-ment Simulation Of The Three Direction Extrusion Processmentioning

confidence: 86%

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Analysis of power parameters of combined three-direction deformation of parts with flange

Aliieva¹,

Markov²,

Aliiev³

et al. 2021

FME Transactions

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The upper bound power method is used to simulate the process of combined radial-backward-forward extrusion of hollow parts of the "cup with flange and branch pieces" type from a continuous workpiece. The calculation scheme with autonomous deformation zones is used, which contains modules with an inclined boundary and the condition for the equality of powers acting on both sides of the intermediate hard zone is accepted. This made it possible to more accurately determine the power regime and the prevailing direction of the metal flow, which is necessary to assess the character of the forming of the part. The comparison of theoretical and experimental values of the deformation pressures and the flow velocities with each other, as well as with the results obtained by the finite element method shows the feasibility of using the obtained functions for technological calculations of power parameters and evaluating of part forming.

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Section: Figure 1 the Comparison Of Deformation Force Diagrams For Various Combined Extrusion Schemes (Aluminium Alloy Al99)mentioning

confidence: 53%

Section: Experimental Research and Finite Ele-ment Simulation Of The Three Direction Extrusion Processmentioning

confidence: 86%

Analysis of power parameters of combined three-direction deformation of parts with flange

Aliieva¹,

Markov²,

Aliiev³

et al. 2021

FME Transactions

Self Cite

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show abstract

“…7, dotted line) from the experimentally obtained (Fig. 7, points), amounts 12 -15% and 15 -20%, respectively [25].…”

mentioning

confidence: 72%

“…The optimal value of the parameter α increases with the deterioration of the friction conditions. The influence of other geometric parameters and ratios on the rationality of using a triangular module 2b instead of a rectangular module 2a is presented in the work [25].…”

Section: Presentation Of the Main Materialsmentioning

confidence: 99%

“…Hollow parts with an external diameter of 28 mm and 24 mm, made in the process of radial-direct extrusion from aluminum alloys, were obtained. The estimation of the stress-strain state of a billet made of aluminum alloy in the process of deformations, obtained using FEM, and experimental data are given in the work [23,25]. and an alternative triangular module 2b.…”

mentioning

confidence: 99%

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Process modeling of sequential radial-direct extrusion using curved triangular kinematic module

Hrudkina¹

2021

FME Transactions

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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.

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Development of smart cold forging die life cycle management system based on real-time forging load monitoring

Seo

2022

Sci Rep

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Cold forging dies are manufactured through the shrink fit process to withstand high pressure loads, but fatigue failure eventually occurs due to repeated compressive stresses. The life cycle until fatigue failure was defined as the limit life, and attempts were made to predict the die life based on finite element method. However, accurate prediction was impossible owing to uncontrollable environmental variables. Consequently, it is impossible to clearly determine the die replacement cycle, resulting in negative consequences such as poor quality, production delay, and cost increase. Various environmental factors affecting the prediction of die life cycle result in the increase or decrease of the forming load, which is an important variable that determines the die life cycle. In this study, a system for monitoring load data generated from forging facilities was developed based on a piezo sensor. In addition, the die life cycle was more accurately predicted by using the forming load data measured in real time, and a die life management system that can determine the die replacement cycle was applied to the automobile steering parts production line.

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Modeling the process of radial-direct extrusion with expansion using a triangular kinematic module

Cited by 5 publications

References 15 publications

Analysis of power parameters of combined three-direction deformation of parts with flange

Analysis of power parameters of combined three-direction deformation of parts with flange

Process modeling of sequential radial-direct extrusion using curved triangular kinematic module

Development of smart cold forging die life cycle management system based on real-time forging load monitoring

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