A springback analysis and compensation method for stamping cover parts based on autoform software

Abstract

The invention relates to the technical field of simulation simulation methods, in particular to a springback analysis and compensation method for stamping cover parts based on AutoForm software. The present invention obtains an optimized full-process scheme and a clamping scheme by performing simulation analysis and sigma robustness analysis on the tool body of the cover, and through repeated iterative adjustment, and obtains the springback compensation of the tool body according to the full-process scheme and the clamping scheme As a result, the reconstructed tool body profile was redrawn based on the compensated tool body profile derived from AutoForm software, and the press deflection compensation was carried out according to the reconstructed tool body profile according to the press equipment parameters, and the final mold processing data was obtained after the compensation was completed. In the present invention, the sigma robustness analysis process is introduced into the traditional springback compensation analysis method, and the reasonable fluctuations of various key elements in actual production are fully considered, so as to obtain a process plan that is closer to the real situation, and avoid cracking, Formability problems such as wrinkling.

Description

technical field [0001] The invention relates to the technical field of simulation simulation methods, in particular to a springback analysis and compensation method for stamping cover parts based on AutoForm software. Background technique [0002] Springback refers to the phenomenon that the material in the plastic deformation zone deforms the part due to residual stress after the external load is removed during the sheet forming process. Springback is a common phenomenon in the sheet metal forming process, which directly affects the dimensional accuracy of stamping parts and the final shape of the parts. [0003] In the early stage of mold development, there are usually two springback control schemes: [0004] 1. According to the past project experience, determine the springback area and springback amount of the part, and make a corresponding compensation plan; [0005] 2. With the help of finite element analysis software, simulate and analyze the springback state of the ...

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Problems solved by technology

[0008] In actual production, the material thickness, yield strength, tensile strength, and friction coefficient of sheet metal are not a single fixed value, but fluctuate within a range, while the material parameters set in the finite element analysis software are a fixed value, which means This leads to the phenomenon that the simulation analysis does not match the actual situation;

[0009] In actual production, the blank holder force of the press fluctuates and is not a single fixed value. However, the blank holder force set in the finite element analysis software in Scheme 2 is a fixed value, which leads to the fact that the simulation analysis does not match the actual situation. The phenomenon;

[0010] In actual production, due to fluctuations in material properties, press performance, and mold performance, moldability problems such as cracking and wrinkling occur, resulting in deterioration of the size of the parts

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