Reverse engineering technology concept

Reverse Engineering (RE) is a related technology for obtaining product mathematical models from physical samples and manufacturing new products. It has become a research and application hotspot in CAD/CAM systems and has developed into a relatively independent field. In this sense, "physical reverse engineering" (referred to as reverse engineering) can be defined as: a general term for digital technology, geometric model reconstruction technology and product manufacturing technology that transforms physical objects into CAD models.

The traditional product development process follows the forward engineering (or forward design) thinking, starting with the collection of market demand information, in accordance with the "product function description (product specifications and expected goals) -> product concept design -> product design and detailed Parts design -> develop production process -> design, manufacturing fixtures, molds and other tooling -> parts processing and assembly -> product inspection and performance testing" steps to carry out work, from unknown to known, from abstract To the specific process.

The reverse (reverse seeking) project is based on the idea of ​​product introduction, digestion, absorption and innovation, with the "physical->principle->function->3D reconstruction->redesign" framework model as the working process, to improve engineering design The quality and efficiency of processing and analysis provide sufficient information. On the other hand, in order to make full use of advanced CAD/CAE/CAM technology to re-innovate engineering services for existing products, reverse (reverse) engineering is beneficial to the positive design of products. The necessary means of supplementing and verifying and promoting positive design.

The background generated by reverse engineering:

After the end of the Second World War, in order to rush to restore and revitalize the economy, Japan proposed the principle of establishing science and technology in the early 1960s: “one generation, two generations of localization, three generations of improved exports, four generations occupying the international market”, among which in automobiles, electronics, and optics. Applications in industries such as equipment and home appliances are most prominent. In order to achieve the improvement of localization, it is urgent to digest, absorb, improve and tap the potential of other countries' excellent products and technologies. The large-scale adoption of reverse engineering technology has laid a good foundation for Japan's economic revitalization and the creation and development of various new products. Up to now, this technology has become an indispensable means or countermeasure for the countries in the world.

Application of reverse engineering technology:

(1) For some reasons, in the case of only tool or product tooling, without drawings and CAD models, it is necessary to carry out limited analysis, processing, mold manufacturing or modification of the product, etc. Use reverse engineering to transform the physical object into a CAD model.

(2) Another important application of reverse engineering is the design of parts with high aesthetic requirements. For example, it is difficult to use existing CAD software in the shape design stage of automobiles. It is usually necessary to make a shape of a clay model and then use a reverse engineering method to generate a CAD model.

(3) Combining reverse engineering and rapid prototyping (RPM) to form a closed-loop system for product design, manufacturing, testing, and modification, enabling rapid iterative iteration of measurement, design, manufacturing, and re-measurement, and high-efficiency product completion. The initial design.

(4) Another important application of reverse engineering is computer-aided detection. When the quality control is carried out, it is often very difficult for the products with complex shapes to be detected. At this time, the reverse engineering method is used to measure the products, and the measured large number of data points are compared with the theoretical model to analyze the product manufacturing errors.

(5) Reverse engineering has a wide range of applications in the fields of medicine, geographic information and film and television. For example, film and television special effects production requires a three-dimensional model of actors, props, etc. to be input into the computer, in order to use the animation software to perform three-dimensional animation effects processing. Reverse engineering in the medical field also has its application value, such as the establishment of artificial joint models; the design and manufacture of medical prostheses; the modification and correction of teeth.

(6) Restoration of damaged or worn parts: When the parts are damaged or worn, the CAD model can be reconstructed directly by reverse engineering, and the surface of the damaged parts can be restored and repaired. Due to the wear and damage of the surface of the tested parts, measurement errors may occur, which requires the reverse engineering system to have reasoning and judgment capabilities. For example, symmetry, standard size, parallel and vertical between planes. Finally, the part is machined.

(7) Digital model detection: Scanning and measuring the processed parts, and then constructing the CAD model by using the reverse engineering method. By comparing the model with the original designed CAD model on the computer, the manufacturing error can be detected and improved. Detection accuracy.

(8) Other applications: In the manufacturing industries such as automobiles, aerospace, shoes, molds and consumer electronics, and even in the leisure and entertainment industry, traces of reverse engineering can be found.

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