Study on the Iterative Compensation Method for Continuous Varying Curvature Free Bending

Ruixue Zhai,Rui Ma,Pengcheng Fu,Cuiyun Ge,Jun Zhao,Rossana Dimitri

doi:10.1155/2021/1346261

Abstract

The parts formed by the bending process not only have high precision of appearance dimension but also have good performance. In recent years, enterprises have put forward higher requirements for the forming process and product quality. Therefore, a new method for iterative compensation of bending springback with certain generality is proposed for continuous curvature bending. The purpose of this study is to take curvature as an iterative parameter and make the shape size reach the expected value through the finite compensation. On the basis of establishing this iterative compensation mechanism, the convergence of curvature iteration in the general free bending process is proved. The reliability of the proposed iterative compensation method in the bending process engineering application is verified by combining simulation with experiment. The two materials of 304 stainless steel and ST12 cold rolled steel were studied, and the two-dimensional plane stress-strain model Abaqus cantilever beam was established by using finite element software. The bending forming simulation was carried out based on the above iterative compensation mechanism. Finally, through the bending experiments of four models, the feasibility of the iterative compensation mechanism of curvature in the continuous curvature plane bending process is verified, and different models are selected to clarify that the method has the characteristics of generality, that is, it will greatly improve the flexibility of the bending process in industrial applications without the limitation of material types and mechanical models.

Highlights

Academic Editor: Rossana Dimitri e parts formed by the bending process have high precision of appearance dimension and have good performance
On the basis of establishing this iterative compensation mechanism, the convergence of curvature iteration in the general free bending process is proved. e reliability of the proposed iterative compensation method in the bending process engineering application is verified by combining simulation with experiment. e two materials of 304 stainless steel and ST12 cold rolled steel were studied, and the two-dimensional plane stress-strain model Abaqus cantilever beam was established by using finite element software. e bending forming simulation was carried out based on the above iterative compensation mechanism
Through the bending experiments of four models, the feasibility of the iterative compensation mechanism of curvature in the continuous curvature plane bending process is verified, and different models are selected to clarify that the method has the characteristics of generality, that is, it will greatly improve the flexibility of the bending process in industrial applications without the limitation of material types and mechanical models

Summary

Research Article

Study on the Iterative Compensation Method for Continuous Varying Curvature Free Bending. E complex problem of plane bending with continuous curvature can be solved by modifying the process parameters by the iterative compensation method. In this study, it is from the iterative point of view in the theoretical environment of the analysis and calculation [12, 13]. The experimental results are compared with the theoretical and simulation results to verify the reliability of the iterative mechanism in the continuous curvature plane bending rebound problem. For the springback control problem, if the relation function y f(x) of the parameters before and after the springback satisfies f′(x) < 1, the iterative compensation method can be used to control the parameters to converge to the target value.

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Conclusion