Shape and surface redesign method of automobile panel mold based on t-spline

A technology for automotive panels and redesign, applied in computing, special data processing applications, instruments, etc., can solve problems such as CAD/CAE cannot be seamlessly integrated, and achieve the effect of reducing the degree of freedom

Active Publication Date: 2017-05-31
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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Problems solved by technology

[0008] In view of this, the object of the present invention is to provide a method for redesigning the shape of an automobile panel mold based on T-splines, which can overcome the inability of seamless integration of CAD / CAE in the existing automobile panel mold surface design technology The problem

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  • Shape and surface redesign method of automobile panel mold based on t-spline

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Embodiment Construction

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] figure 1 It is a schematic flow chart of the method of the present invention, as shown in the figure, the method consists of 4 steps. Including: step 1), converting the digital model of automobile panels (S0) into a single T-spline surface (S1) on any topological structure, this step includes two sub-steps of watertight stitching and property optimization; step 2), using etc. A geometric analysis method is used to obtain a single T-spline surface (S2) expressing springback deformation; step 3), and an isogeometric analysis method is used to obtain a single T-spline surface (S3) expressing springback compensation; step 4) , transforming S3 into an automotive panel mold surface (S4) compatible with international standards.

[0019] S0 is the design input, S4 is the design output, S1 and S4 are multiple clipped NURBS surface collectio...

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Abstract

The invention relates to a profile redesigning method of an automobile covering part die based on a T spline and belongs to the technical field of automobile covering part die design. The profile redesigning method comprises the steps that firstly, an automobile covering part digital model S0 is transformed into a single sheet T spline surface S1 on any topological structure; secondly, a single sheet T spline surface S2 for expressing rebound deformation is obtained with an isogeometric analysis method; thirdly, a single sheet T spline surface S3 for expressing rebound compensation is obtained with the isogeometric analysis method; lastly, the S3 is transformed into an automobile covering part die profile S4 compatible with the international standard. According to the profile redesigning method of the automobile covering part die based on the T spline, the T spline serves as a carrier of the redesign of the profile of an automobile covering part die, isogeometric analysis serves as the means, and the design result can be used for parameterization of the design flow of the automobile covering part die. In addition, the isogeometric analysis method of rebound calculation and compensation based on a T spline primary function is adopted, and thus the degree of freedom of massive numerical calculation is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of automobile panel mold design, and relates to a method for redesigning the shape and surface of an automobile panel mold based on T-splines. Background technique [0002] At present, due to the huge difference between the digital models of design and analysis, it is difficult for the digital models to achieve real interoperability in the seamless integration of design and analysis. The so-called seamless integration of design and analysis is just a one-way lossless data exchange between design software and analysis software, that is, a one-way mapping from design to analysis. For the digital model of free-form surface parts with extremely high geometric accuracy and extremely demanding physical performance requirements (such as the digital model of automobile panels), the design evolution is affected by the inevitable small gaps or overlaps in the nature of cutting NURBS. The result is that the digitized ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 范树迁石明全井光辉张鹏刘基权邹劲松
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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