A Prediction, Evaluation and Optimization Method for 3D Stretch Bending Formability of Profiles

A technology of stretch-bending forming and optimization method, which is applied in the field of machining and manufacturing, can solve the problem that the formability cannot meet the design requirements, etc., and achieve the effect of optimizing the formability

Inactive Publication Date: 2019-08-20
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

[0005] Sometimes, formability does not meet design requirements after stretch-bending products have been predicted

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  • A Prediction, Evaluation and Optimization Method for 3D Stretch Bending Formability of Profiles
  • A Prediction, Evaluation and Optimization Method for 3D Stretch Bending Formability of Profiles
  • A Prediction, Evaluation and Optimization Method for 3D Stretch Bending Formability of Profiles

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Embodiment Construction

[0069] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0070] The optimization method for predicting and evaluating the three-dimensional stretch-bending formability of profiles includes the following steps:

[0071] S1. Establish a finite element calculation model to predict the finite element calculation results of the profile after three-dimensional stretch bending and springback, and then obtain the three-dimensional stretch bending formability of the profile; S2. According ...

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Abstract

The invention discloses a method for predicting, evaluating and optimizing the three-dimensional stretch-bending formability of profiles, which includes the following steps: S1. Establishing a finite element calculation model, predicting the finite element calculation results of profiles after three-dimensional stretch bending and springback, and then obtaining profiles Three-dimensional stretch bending formability; S2. Evaluate the three-dimensional stretch bending formability of the profile according to the finite element calculation results after three-dimensional stretch bending and springback; S3. Optimize the three-dimensional stretch bending formability according to the finite element calculation model and formability requirements parameters to optimize the formability of 3D stretch bending. The invention can predict, evaluate and optimize the three-dimensional bending formability of profiles, avoid or reduce the work of mold opening and mold testing, reduce production costs and significantly shorten the development cycle, and make stretch-bending formed parts more competitive in the market.

Description

technical field [0001] The invention relates to the field of mechanical processing and manufacturing, in particular to a method for predicting, evaluating and optimizing the three-dimensional stretch-bending formability of profiles. Background technique [0002] Three-dimensional stretch bending forming technology is widely used in automobiles, railway locomotives, aerospace and other fields, such as automotive door frame top bars, door guide rails, rail vehicle roof beams, aircraft frame ribs, long trusses and other parts are all made of stretch bending technology production. Such parts are characterized by long longitudinal dimensions, large bending radii, and high requirements for shape accuracy. Stretch bending is generally used in production. Stretch bending has the advantages of less residual stress and is suitable for bending parts with variable curvature. However, the stretch-bending formed parts are hollow and thin-walled, so it is easy to produce wall section dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23G06F2119/06
Inventor 刘杰万里翔王波
Owner SOUTHWEST JIAOTONG UNIV
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