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Skin roll-bending part sectional curvature analysis method

A part and roll bending technology, which is applied in the field of section curvature analysis of skin roll bending parts, can solve problems such as insufficient efficiency and time-consuming process personnel, and achieve the effects of improving efficiency, reducing workload, and reducing errors

Inactive Publication Date: 2015-03-04
JIANGXI HONGDU AVIATION IND GRP
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Problems solved by technology

When the craftsman analyzes the digital model of the part, he also needs to reverse the digital model to establish the internal process supplementary surface and supplementary structure. Such part process analysis consumes the time of the craftsman and is not efficient enough

Method used

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  • Skin roll-bending part sectional curvature analysis method
  • Skin roll-bending part sectional curvature analysis method
  • Skin roll-bending part sectional curvature analysis method

Examples

Experimental program
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Embodiment

[0022] Example: see Figure 1 to Figure 9 .

[0023] A method for analyzing the curvature of a section of a skin roll bending part, the specific implementation steps of the method are as follows:

[0024] Step 1: Dial-to-analog discretization of parts

[0025] The digital-analog discretization of parts is to discretize the mesh of the skin rolling parts, and discretize the geometric model into a grid model, which is realized in commercial CAD software (CATIA) or commercial finite element preprocessing software (HyperMesh). The method in the present invention can operate on various mesh models, including pure triangular mesh, pure quadrilateral mesh and mixed element mesh in the shell element mesh model, and pure six-node five-point mesh in the volume element mesh model. Hedra meshes, pure eight-node hexahedral meshes, and mixed-element meshes.

[0026] Step 2: Discrete Mesh Surface Segmentation

[0027] The discrete mesh surface segmentation is based on the surface topolog...

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Abstract

The invention relates to the technical field of aviation aircraft manufacturing, in particular to a skin roll-bending part sectional curvature analysis method. The method includes: treating digital-analog discrete grids of a skin roll-bending part, and rapidly obtaining a part datum plane by a part grid surface segmentation method; then, generating and automatically connecting part section segments so as to obtain a part section characteristic curve; finally, subjecting the section characteristic curve to curvature analysis so as to obtain curvature information of the roll-bending part. The skin roll-bending part sectional curvature analysis method has the advantages that the method is a rapid part curvature analysis method, can be convenient for development of independent programs and can achieve automatic computational analysis of part section information; workload of workers can be reduced, technology analysis efficiency can be improved greatly and errors caused by man-made faults can be decreased.

Description

technical field [0001] The invention relates to the technical field of aviation aircraft manufacturing, in particular to a method for analyzing the curvature of a section of a skin rolling part. Background technique [0002] In the design of aircraft parts, most of the parts that are rolled and formed need to be processed later, and the concave or convex surfaces of the parts are machined. There is no special design for the bending parts. Generally, the digital model of the parts after machining is used as the theoretical shape of the bending parts. In the production process, craftsmen are required to extract the features of the part from the digital model of the part as the process basis. Due to the presence of cutting features inside the part, such as step depressions, internal holes, etc. (such as figure 1 ), so there may not be a complete process surface inside the digital model of the part for process analysis. When the craftsman analyzes the digital model of the par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 党晖龚甘霖
Owner JIANGXI HONGDU AVIATION IND GRP
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