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Spring-back analysis and full-profile compensation method for cold-stamping of automobile fender

A technology for automobile fenders and springback compensation, which is applied to vehicle parts, special data processing applications, instruments, etc., can solve the problems of long manufacturing cycle and high mold production cost, improve quality, save mold debugging costs, and shorten molds The effect of the debug cycle

Inactive Publication Date: 2018-04-13
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stamping process designers also try to minimize springback through reasonable process design and boundary condition settings in the stamping process design stage. However, due to the complexity of the fender product forming process, the springback problem cannot be satisfactorily resolved and still needs to be repeated. Mold repair and mold testing lead to high mold production cost and long manufacturing cycle

Method used

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  • Spring-back analysis and full-profile compensation method for cold-stamping of automobile fender
  • Spring-back analysis and full-profile compensation method for cold-stamping of automobile fender
  • Spring-back analysis and full-profile compensation method for cold-stamping of automobile fender

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The product model of the fender of a certain model A is as follows: figure 1 As shown, the springback analysis and full-surface springback compensation steps are as follows:

[0047] 1. Import the profiles of each process in the stamping process diagram of the fender into the AutoForm software in igs file format, set and analyze according to the action relationship and parameters indicated in the stamping process chart, and check the convergence of the analysis file and the placement of each process. Part status, plastic strain rate during mold clamping in each process;

[0048] 2. Obtain the result of free springback before springback compensation of the workpiece, such as figure 2 Shown; (Positive value indicates that the surface of the part after springback is higher than that of the original product, and a negative value indicates that the surface of the part after springback is lower than the original product)

[0049] 3. Determine the minimum clamping scheme ac...

Embodiment 2

[0056] The product model of a certain model B fender is as follows: Figure 9As shown, the springback analysis and full-surface springback compensation steps are as follows:

[0057] 1. Import the profiles of each process in the stamping process diagram of the fender into the AutoForm software in igs file format, set and analyze according to the action relationship and parameters indicated in the stamping process chart, and check the convergence of the analysis file and the placement of each process. Part status, plastic strain rate during mold clamping in each process;

[0058] 2. Obtain the result of free springback before springback compensation of the workpiece, such as Figure 10 Shown; (Positive value indicates that the surface of the part after springback is higher than that of the original product, and a negative value indicates that the surface of the part after springback is lower than the original product)

[0059] 3. Determine the minimum clamping scheme accordin...

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Abstract

The invention relates to a spring-back analysis and full-profile compensation method for a cold-stamped part of an automobile fender and belongs to the field of manufacturing of stamping molds for automobile covering parts. The method comprises specific steps as follows: step 1: a spring-back result of the part of the fender is predicted as follows: analog simulation is performed on the forming process of the part of the fender by the aid of finite element analysis software AutoForm, and the spring-back result is predicted; step 2: a spring-back compensation scheme for the part of the fender is determined; step 3: full-profile spring-back compensation for the part of the fender is performed, and multiple rounds of iterative compensation is performed by the aid of the finite element analysis software AutoForm until the size requirements are met; step 4: product data of the part of the fender are reconstructed. The method has the positive effects that the defects of low fender size precision and high mold transformation workload in the past are overcome by the aid of fender spring-back analysis and spring-back compensation based on the finite element analysis technology, the qualityof a fender product is substantially improved, the mold debugging cost is reduced, and the mold debugging period is shortened.

Description

technical field [0001] The invention relates to a springback analysis and full profile compensation method of a cold stamping part of an automobile fender, and belongs to the field of stamping die manufacturing of automobile cover parts. Background technique [0002] As an important component of automobiles, automobile fender parts have high quality requirements and great difficulty in forming. Therefore, higher requirements are put forward for the quality of stamping dies for producing fender parts. Among them, the most important factor affecting the dimensional accuracy of automobile fender parts is springback. Stamping process designers also try to minimize springback through reasonable process design and boundary condition settings in the stamping process design stage. However, due to the complexity of the fender product forming process, the springback problem cannot be satisfactorily resolved and still needs to be repeated. Mold repairing and mold testing lead to high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D53/88G06F17/50
CPCB21D53/88G06F30/23
Inventor 闫巍张健王刚冯岩王文瑞
Owner CHINA FIRST AUTOMOBILE
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