Robust design method for metal corrugated pipe hydraulic bulging process

A metal bellows, hydraulic bulging technology, applied in computing, instrumentation, electrical and digital data processing, etc., can solve problems such as poor consistency, low product qualification rate, and inaccurate quality control.

Pending Publication Date: 2019-10-25
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a robust design method for metal bellows hydraulic bulging process, which solves the problems of inaccurate quality control, low product qualification rate and poor consistency in the traditional metal bellows hydraulic bulging process

Method used

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  • Robust design method for metal corrugated pipe hydraulic bulging process
  • Robust design method for metal corrugated pipe hydraulic bulging process
  • Robust design method for metal corrugated pipe hydraulic bulging process

Examples

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Embodiment Construction

[0040] Describe in detail below in conjunction with accompanying drawing.

[0041] This example combines figure 1 The flow chart of robust design of bellows hydraulic bulging process parameters, adopts double-layer U-shaped bellows, the inner material is Inconel625, the outer material is 316L, and the geometric dimensions are: outer diameter 88mm, inner diameter 65.5mm, wave pitch 5.8 mm, wave thickness 3.2mm, wave height 11.25mm, wave crest fillet radius 1.6mm, wave trough fillet radius 1.3mm, tube blank single-layer wall thickness 0.2mm.

[0042] (1) Select the bellows hydraulic bulging quality evaluation index—wave height and maximum wall thickness thinning rate—as the optimization objective and optimization constraints. Through the weight of the influence of factors on the forming quality, the experiment is arranged to analyze the importance of factors, and the unimportant influencing factors are selected and eliminated.

[0043] (2) Assuming that the mechanical property...

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Abstract

The invention discloses a robust design method for a metal corrugated pipe hydraulic bulging process. The method comprises the following steps: selecting a quality evaluation index for optimizing thecorrugated pipe hydraulic bulging process as an optimization target and an optimization constraint condition; enabling material parameters to serve as noise factors, process parameters to serve as controllable factors, and formulating a factor level table; performing a virtual test by adopting a Taguchi robust design method, and calculating each process condition combination in the test table to obtain a quality characteristic result; calculating the signal-to-noise ratio of the quality characteristic according to the obtained quality characteristic result, converting the signal-to-noise ratiointo standardized quality loss, and synthesizing comprehensive quality loss; selecting the comprehensive quality loss as an optimization target, and constructing a response surface robust model of the comprehensive quality loss and a design variable by adopting a regression method; and solving an optimal value of the constructed response surface robust model of the comprehensive quality loss andthe design variable by using a genetic algorithm. The method can solve the problems that in the traditional metal corrugated pipe hydraulic bulging process, quality control is inaccurate, the productpercent of pass is low, and consistency is poor.

Description

technical field [0001] The invention relates to the technical field of hydraulic bulging of metal bellows, in particular to a robust design method for hydraulic bulging of metal bellows. Background technique [0002] Metal bellows parts are widely used as elastic elements in aerospace, shipbuilding, petrochemical, electric power, construction, nuclear energy and other fields due to their multiple functions such as sealing, flexible compensation, and energy storage. There are various forming methods for bellows. With the continuous improvement of high performance and precision requirements for metal bellows, hydraulic bulging has gradually become the main method for precise plastic forming of metal bellows. However, the hydraulic bulging of metal bellows is a complex physical process involving material nonlinearity, geometric nonlinearity, and boundary condition nonlinearity. There are many parameters in the forming process, and it is difficult to control them comprehensively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2111/04G06F30/17G06F30/23
Inventor 刘静吕志勇李兰云崔磊陈庆龙
Owner XI'AN PETROLEUM UNIVERSITY
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