what is cad

Computer Aided Design refers to the use of computers and graphics equipment to help designers carry out design work.

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In design, computers are usually used to perform a large number of calculations, analyzes and comparisons of different solutions to determine the optimal solution; various design information, whether digital, Text or graphics can be stored in the computer's memory or external memory and can be retrieved quickly; designers usually start with sketches, and the heavy work of turning sketches into working drawings can be left to the computer; the computer can automatically The generated design results can quickly produce graphics, allowing designers to make timely judgments and modifications to the design; computers can be used to perform graphics data processing related to graphics editing, amplification, reduction, translation, copying and rotation.

As an outstanding engineering technology achievement, CAD technology has been widely used in various fields of engineering design. The development and application of CAD systems have profoundly changed traditional product design methods and production models, producing huge social and economic benefits. Current CAD technology research hot spots include computer-aided conceptual design, computer-supported collaborative design, massive information storage, management and retrieval, design method research and related issues, support for innovative design, etc. It is foreseeable that there will be a new leap in technology, and it will also cause a design change.

CAD technology has been in constant development and exploration. The application of CAD technology has played a role in improving enterprise design efficiency, optimizing design plans, reducing the labor intensity of technical personnel, shortening the design cycle, and strengthening design standardization. More and more people realize that CAD is a huge productivity. CAD technology has been widely used in machinery, electronics, aerospace, chemical industry, construction and other industries. Design methods such as concurrent design, collaborative design, intelligent design, virtual design, agile design, and full life cycle design represent the development direction of modern product design models. With the further development of artificial intelligence, multimedia, virtual reality, information and other technologies, CAD technology will inevitably develop in the direction of integration, intelligence and collaboration. Enterprise CAD and CIMS technology must take a step-by-step path targeting e-commerce. Starting from within the enterprise, we realize integrated, intelligent and networked management, use e-commerce to cross the boundaries of the enterprise, and realize a truly agile supply chain for customers, within the enterprise and between suppliers.

Development History of Domestic CAD

Chinese CAD technology originated from the secondary development based on foreign CAD platform technology. As Chinese enterprises’ demand for CAD applications increases, domestic Many CAD technology developers have made domestic enterprises truly popularize CAD by developing secondary development products based on foreign platform software, and a number of truly outstanding CAD developers have gradually emerged.

On the basis of secondary development, some top domestic CAD developers have gradually explored CAD that is suitable for China's development and demand patterns, and are more in line with CAD products used by domestic enterprises. Their purpose is to develop the best CAD, even providing the best CAD technology to the world.

As of 2014, in addition to providing excellent CAD platform software technology, it has been actively promoting the development of domestic CAD technology. The Domestic CAD Alliance formed by uniting many domestic CAD secondary developers has greatly promoted the development of domestic CAD technology. The development and growth of CAD provides Chinese enterprises with CAD solutions that truly suit China's national conditions and application needs.

Basic technologies

Mainly include interactive technology, graphics transformation technology, surface modeling and solid modeling technology, etc.

In computer-aided design, interactive technology is essential. Interactive CAD system means that when users use computer systems to design, people and machines can exchange information in a timely manner. Using an interactive system, people can conceive, proof, and modify at the same time, and can see the display results of each step of the operation on the graphic terminal screen at any time, which is very intuitive.

The main function of graphics transformation is to connect the user coordinate system and the coordinate system of the graphics output device; perform translation, rotation, scaling, and perspective transformation on graphics; and implement graphics transformation through matrix operations.

Computer Design Automation Computer's own CAD aims to realize automation or semi-automation of the computer's own design and development process. Research content includes functional design automation and assembly design automation, involving computer hardware description language, system-level simulation, automatic logic synthesis, logic simulation, microprogramming automation, automatic logic division, automatic layout and routing, and corresponding interactive graphics systems and engineering databases system. Integrated circuit CAD is sometimes included in the scope of computer design automation.

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