Reverse modeling method using mesh data as feature

Abstract

A reverse modeling method using mesh data as a feature to allow reverse modeling to be conducted by following a procedure of an original designer includes the steps of detecting optional model data, setting the model data as a feature, and establishing a reference coordinate system of set mesh data; establishing a work plane on which a sketch of the set mesh data can be projected; projecting section data of the mesh data on the work plane; dividing data projected on the work plane into feature segments depending upon curvature distributions, and producing divided segments as sketch data; and producing a three dimensional feature from the sketch data which corresponds to a shape of the mesh data, and storing the produced three dimensional feature as model data, wherein the produced sketch data and three dimensional feature are parametrically connected with each other.

Description

technical field [0001] The present invention relates to a reverse modeling method using grid data as a feature, in particular, to such a reverse modeling method using grid data as a feature, which uses grid data as a feature, making it possible to follow the original product designer The process of designing products using 3D CAD programs and implementing reverse modeling. Background technique [0002] As is well known in the art, when utilizing CAD / CAM / CAE to operate a digital production system, a digital model of the part, such as a three-dimensional CAD model, is unavoidably required. Specifically, in representative fields where reverse engineering is used for reproduction work, handmade products, old products for which design data no longer exist due to the lapse of time, competitors' products, and the like are generally included. [0003] In order to perform the reproduction work process together with the existing work plan, the reverse engineered model data must be ma...

AI Technical Summary

Problems solved by technology

Although such an operation can construct the desired curve network, it requires more time and know-how, and, since parameterization cannot be ensured, it is difficult to carry out redesign or correction work

[0011] The advantage of automatic surface inpainting is that accurate shape information can be obtained by detecting only the outer surface of the mesh data, however, it is difficult to correct the resulting surface

Also, it is difficult to adjust the quality of the surface due to the large number of patches generated

[0012] In addition, although the automatic generation of curve networks is convenient, it requires a lot of effort and time because it is difficult to modify the curves, and it is difficult to perform redesign or correction work because parameterization cannot be ensured

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