Free curved surface product reverse engineering modeling prototyping method based on three-dimensional optical scanning

Abstract

The invention discloses a free curved surface product reverse engineering modeling prototyping method based on three-dimensional optical scanning. The free curved surface product reverse engineering modeling prototyping method based on three-dimensional optical scanning includes over-scanning, reverse modeling, quality analysis, rapid prototyping, and printing of the final three-dimensional model,and is characterized by pasting mark points on the front and back surfaces of a free curved surface product and setting a rotating disk at the same time, realizing integrity and accuracy of scanningby means of auxiliary paste points on the rotating disk, utilizing a non-contact three-dimensional optical scanner to easily scan the full view of a multi-curved-surface product at higher speed, afterreverse modeling, utilizing Geomagic Qualify software to perform 3D comparison of the sampling point on the obtained reverse model and the point cloud data in the step (2), and according to the analysis and comparison situation, continuously correcting and scanning the point cloud data or the reverse three-dimensional model, so that the free curved surface product reverse engineering modeling prototyping method based on three-dimensional optical scanning has the advantages of guaranteeing the quality of the output product, improving the work efficiency, being low in the product quality reworkrate and saving printing of consumables.

Description

technical field [0001] The invention relates to the technical field of rapid prototyping, in particular to a reverse engineering modeling method for free-form surface products based on three-dimensional optical scanning. Background technique [0002] Reverse engineering technology has been applied to product duplication, imitation, improvement and innovative design. It is an important supporting means to absorb advanced technology and shorten product design and development cycle. It is widely used in machinery, aviation, automobile, medical treatment, art and other fields. [0003] In the prior art, contact scanning equipment is usually used to scan the point cloud data of free-form surface products, but the speed is relatively slow, and many points need to be measured to approximate the curve of free-form surface products. In addition, when using a non-contact optical scanner to scan a free-form surface product in the prior art, it usually directly scans the point cloud dat...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, contact scanning equipment is usually used to scan the point cloud data of free-form surface products, but the speed is relatively slow, and many points need to be measured to approximate the curve of free-form surface products

In addition, when using a non-contact optical scanner to scan a free-form surface product in the prior art, it usually directly scans the point cloud data of the front and back of the free-form surface product. First, the scanning accuracy is not high and the integrity is not enough. When the scanned point cloud data is imported into the Geomagic studio software to reconstruct the model, the stitching accuracy is not high, and the characteristics of the object cannot be reflected after the reverse modeling, resulting in the failure of the reverse modeling

[0004] In addition, in the existing technology, it is usually printed directly after the reverse modeling is completed, resulting in a large gap between the printed 3D entity and the scanned entity. The important reason is that the accuracy of data scanning is not enough, and another reason is that there is no quality after reverse modeling. Contrast or quality comparison only depends on human observation and correction, resulting in heavy workload, low work efficiency, high rework rate, and waste of printing consumables

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