A load optimization method and system for segmental correction of structural parts processing deformation

Abstract

The present disclosure proposes a load optimization method and system for segmental correction of processing deformation of structural parts, wherein the method includes the following steps: according to the structural characteristics of the part to be corrected and the curvature characteristics of the processing deformation deflection line, the processing deformation area is segmented, Obtain multiple calibration areas; obtain the initial calibration optimization data of each calibration area under the action of the initial calibration load; according to the obtained initial calibration optimization data, the nonlinear minimum optimization function is used to solve the constructed calibration load optimization model, and each The optimal correction load value of the correction area; the correction load optimization model is constructed with the goal of minimizing the residual deformation. This disclosure establishes an optimization model with the minimum residual deformation as the evaluation index, and then calculates the optimal value of the correction load through a nonlinear minimum optimization function. This method can accurately obtain the optimal correction load during the correction process of the structural part, and ensure the quality and quality of the structural part correction. Correction accuracy.

Description

technical field [0001] The present disclosure relates to the related technical field of machining deformation control of structural parts, in particular, to a method and system for optimizing load for segmental correction of structural parts machining deformation. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Structural parts are new types of workpieces that appear to meet the requirements of high mobility, long life, and high reliability in modern vehicles and large equipment. They have the characteristics of complex structure, large size, and thin workpiece walls. CNC machining deformation problems are serious, especially After the domestic forging blank material has been popularized and applied, this problem is particularly prominent, which seriously affects the production efficiency and research and development efficiency of my count...

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Problems solved by technology

[0006] Aiming at the problem of processing deformation correction after the processing of structural parts, some scholars have proposed a method of processing deformation. The parts that need to be corrected are placed on the mold, and the technicians observe the deformation position of the structural parts, and apply the hand feeling force through the rolling correction device. , and then observe whether the corrected deformation error of the structural parts meets the design accuracy. If not, further correction is required. This method is time-consuming and laborious, and the accuracy is not easy to guarantee, and the correction method is rough

Other scholars have proposed a correction method based on the equivalent bending moment method, but this method is aimed at the correction method of simple T-shaped parts, and the correction accuracy for complex parts is low, and it is difficult to ensure the correction quality of the corrected structural parts

Moreover, since the deformation of parts after CNC machining is different in different positions, rough manual correction and single correction load will cause over-correction or incomplete correction of part deformation, and the correction accuracy of parts depends entirely on Due to the operator's experience and visual observation, it is difficult to guarantee the installation accuracy and service life of the parts

[0007] To sum up, there are deficiencies in the existing processing deformation correction technology of structural parts. At present, there is no effective method. Using the stress control technology before processing and the improvement of processing technology during processing, although the processing deformation of structural parts can be improved , but the problem of deformation after processing is still very serious

The existing processing deformation correction technology uses manual experience correction and single correction load correction in the rolling process. It is difficult to guarantee the correction quality and correction accuracy of structural parts, and structural parts are prone to over-correction and incomplete correction problems. Deformation is a typical nonlinear problem. It is difficult to find an accurate mathematical model to characterize the relationship between the correction load and the deformation of the workpiece. The existing technology is difficult to meet the installation accuracy of the structural parts and the service life of the parts, and it is difficult to realize the intelligentization of the correction process. and precision

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