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A Calculation Method for Warping Deformation of Plate Parts Caused by Residual Stress Release

A technology of residual stress and calculation method, which is used in the calculation of warping deformation of plate parts, and the calculation field of warping deformation, to achieve the effect of high calculation accuracy

Active Publication Date: 2021-05-07
BEIHANG UNIV
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Problems solved by technology

These impacts are relatively small in ordinary industries, but for some high-tech industries, any impact will have disastrous consequences

Method used

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  • A Calculation Method for Warping Deformation of Plate Parts Caused by Residual Stress Release
  • A Calculation Method for Warping Deformation of Plate Parts Caused by Residual Stress Release
  • A Calculation Method for Warping Deformation of Plate Parts Caused by Residual Stress Release

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Embodiment Construction

[0069] Attached below figure 1 The method flow of the present invention is further described so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly. Among them, attached figure 2 The described example of a plate-type workpiece to which the method is applicable is only used to explain the present invention, and cannot be construed as a limitation to the present invention.

[0070] Step 1: Obtain the residual stress distribution of each layer of the rectangular blank along the layer depth direction through the residual stress measurement method, and each layer should have residual stress values ​​in both X and Y directions;

[0071] Step 2: In the 3D modeling software, according to the 3D model of the part and the blank, obtain the removal ratio f of each layer during the layer-by-layer material removal process of the part i ( figure 2 ...

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Abstract

In order to improve the manufacturing accuracy of plate parts and obtain the deformation information of the parts in advance in the manufacturing stage, a calculation method for the warpage deformation of plate parts caused by the release of residual stress is proposed. Based on elastic mechanics and plate and shell theory, this method calculates the warping deformation of plate parts during processing by equating the release of residual stress to the uniform moment applied on the edge of the plate. Based on the calculation results of this method, the manufacturing errors of different forms of plate parts can be predicted, which provides a theoretical basis for improving manufacturing accuracy.

Description

technical field [0001] The invention relates to a calculation method for warping deformation of plate parts caused by residual stress release, which is a calculation method for warping deformation of plate parts caused by residual stress release during cutting processing. The invention belongs to the field of mechanical manufacturing. Background technique [0002] In the process of industrial production, whether it is various mechanical processing processes, strengthening processes, uneven plastic deformation or metallographic changes, residual stress will inevitably be generated on materials and their products. Residual stress is a kind of internal stress, which is self-equilibrium and will remain in the material after the external force and the uneven temperature field disappear. This internal stress will have a certain impact on the parts, such as fatigue strength, static strength, brittle failure and so on. These impacts have little impact on ordinary industries, but f...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/17G06F119/14
CPCG06F30/17G06F30/23G06F2119/06
Inventor 高瀚君吴琼张以都刘畅周文兵高子涵
Owner BEIHANG UNIV
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