CAE-based profile stretch bending resilience simulation method

Abstract

The invention belongs to the technical field of CAE (Computer Aided Engineering), and provides a CAE-based profile stretch bending resilience simulation method, which comprises the following steps of:extracting a characteristic line of a bending piece; extracting end point positions of the series of unfolded lines, establishing a reasonable guide curved surface section according to the section shape of the product, performing finite element mesh division on the blank, and simulating to decompose the blank into an axial force and a displacement along the track; defining other CAE solving related parameters such as the material attribute of the blank and the contact attribute of the blank and the mold; and solving calculation; introducing the corrected mold into a CAE mold for re-calculation until the error between the calculated model and the theoretical model is within an acceptable range. The method has the advantages that the debugging frequency of the track in the mold is reduced,a large amount of calculation time can be saved, the on-site bending debugging frequency and time can be effectively reduced, and the working effect is improved.

Description

technical field [0001] The invention relates to computer-aided engineering (CAE) technology, in particular to a CAE-based springback simulation method for profile stretching, using CAD and CAE technology to analyze the springback of profile stretching and using the result to guide the design of a bending die. Background technique [0002] For stretch springback, the current main method is to predict by empirical formula or pure theory method, or simplify the complex 3D problem to 2D and then predict it by finite element method, but due to the existence of loading path and actual processing Deviation and other factors, the current theoretical calculation and CAE simulation can not accurately solve the springback problem in the complex 3D stretch bending process, to effectively predict the springback and design a high-precision bending mold based on the springback results requires a The simulation method with consistent loading conditions can improve the solution accuracy of s...

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Problems solved by technology

[0003] In order to solve the problems that the complex 3D stretch-bend springback calculation loading trajectory is difficult to obtain, and the springback calculation requires multiple trial calculations, which leads to too long calculation time and does not meet the actual construction period requirements, etc., the present invention proposes a method for quickly obtaining the loading trajectory and according to the actual site The characteristics of the bending process, through the equivalent method, not only realizes a loading method similar to the actual process in CAE, but also improves the stability of the calculation process, and basically solves the non-convergence of the solution in the complex 3D stretch-bending springback process The problem

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