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Springback compensation method for creep age forming

A technology of creep aging forming and springback compensation, which is applied in special data processing applications, instruments, electrical digital data processing, etc. It can solve the problems of time-consuming calculation, many iterations of springback compensation, and low compensation accuracy, so as to improve compensation Efficiency, reduced compensation time, and high surface accuracy

Inactive Publication Date: 2018-11-30
CENT SOUTH UNIV
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  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to provide a springback compensation method for creep aging forming, which solves the technical problems of many springback compensation iterations, time-consuming calculation and low compensation accuracy in the prior art;

Method used

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  • Springback compensation method for creep age forming
  • Springback compensation method for creep age forming
  • Springback compensation method for creep age forming

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Embodiment

[0114] Example: Springback Compensation Method for Creep Aging Forming Die Surface Optimization

[0115] The invention provides a springback compensation method for creep aging forming, please refer to the description of the specific method. The material parameters of the constitutive model were inversely calculated using the genetic algorithm. The engineering allowable maximum forming error is 0.5 mm, and the parameters in the creep constitutive model are shown in Table 2. According to the steps in the specific method, the parameters in Table 2 are brought in and then the mold surface is optimized.

[0116] Table 2 The material parameter table of the creep constitutive model in the method provided by the present invention

[0117] A

B

σ 0

σ i

C ss

C ppt

C dis

C 1

C 2

C 3

C 4

k 1

k 2

k 3

0.95

0.14

15.4

111.2

70.3

79.1

125.1

3.7e-6

1.0

141.9

271.8

1.63

0.38

0.56

...

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Abstract

The invention provides a springback compensation method for creep age forming. The method comprises the following steps: Step S100, based on MSC.MARC commercial finite element software, constructing creep age forming finite element simulation; Step S200, weighting a springback iterative compensation process based on a molding surface of a finite element simulation result; and Step S300, considering a reverse compensation process of high temperature molding surface thermal expansion effect. The method considers the influence of the strength of a component on surface compensation, the influenceof a component feature structure on surface compensation, and reverse compensation of thermal expansion of a high temperature molding surface. A component formed by the model can still meet the engineering error requirement after being cooled.

Description

technical field [0001] The invention relates to the technical field of creep aging precise forming manufacturing, in particular to a springback compensation method for creep aging forming. Background technique [0002] Creep aging forming technology is a forming method that utilizes the creep characteristics of metals to synchronize forming and aging heat treatment. Creep aging forming is especially suitable for forming large-scale integral components for aerospace. When this technology is used for component forming, it can ensure the synergy between precise forming and high-performance forming properties of components. Creep aging forming technology has the advantages of high forming precision, low forming cost, high repetition rate and low residual stress. However, after the component undergoes creep aging forming, due to the existence of elastic recovery, the material will inevitably spring back. [0003] In order to eliminate the influence of elastic recovery on compon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 湛利华杨有良黄明辉喻吉望
Owner CENT SOUTH UNIV
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