Advantages, disadvantages and development of computer aided design

Advantages, disadvantages and development of computer aided design

CAD technology has been widely used in machinery, electronics, architecture, chemical industry, aerospace, energy transportation and other fields, and is an indispensable part. The following are the advantages, disadvantages and development of the computer-aided design I searched for you. Welcome to read, I hope it will help you! For more information, please continue to pay attention to our fresh graduates training network!

1, Development of Computer Aided Design

The research idea of computer-aided design originated from 1950, but the earliest record was in 1963. A graphic line drawing system with computer host, display screen, photoelectric pen and keyboard as tools is realized. This graphic line drawing system has developed and introduced many basic ideas and technologies of computer drawing, so that users can draw straight lines, complex curves and simple standard parts with computers. But at first, it was simply used as a substitute for the drawing board. By 1970s, the main features of CAD technology were interactive 2D drawing and 3D wireframe model. By using analytic geometry method, related pixels (such as points, lines and circles) are defined to draw or display graphs composed of straight lines and arcs. This initial wireframe model system can only express the basic information of graphics, and cannot realize computer-aided engineering analysis (CAE) and computer-aided manufacturing (CAM). Computer-aided design has gone through a long and tortuous development process, until the later two-dimensional drawing transited to three-dimensional modeling and now intelligent CAD technology integrating product conception, functional design, structural analysis, manufacturing and data management. Nowadays, CAD technology is more and more widely used in design and production.

2. Advantages of 2.CAD drawing

1. Quick drawing

I communicate with students in the teaching process, and everyone agrees that we used to draw engineering drawings by hand. It takes a lot of time and energy to draw a complete drawing, but also pay attention to the neatness of the drawing, the width of the lines and the beautiful font, which makes everyone feel very tired. Now there is no problem in this area with CAD, and thick and thin lines are used? Features? Be standardized and clear at a glance. The size is also quite accurate, as much as you entered on the command line, very accurate. When drawing lines and connecting lines, the advantages of CAD size are more obvious. For example, when drawing a circle and a straight line is tangent, hand painting can only feel almost the same, and no matter how it is drawn, it is asymmetrical. With CAD drawing, you can catch the tangent point by opening object snap, which is fast and accurate! The dimensioning is faster and more convenient. As long as you design your own labeling format, the computer can label it as required. Inserting text is also very convenient. You can enter the text content in the multi-line text editor and get the absolute standard national standard characters. You can insert roughness, title bar, etc. Divide into blocks at will, without drawing one by one. It's really fast to use!

2. Convenient storage

Graphics and image files made by CAD software can be directly stored on floppy disks and hard disks, and data storage and retrieval are very convenient. You can burn the design project into a CD, and the data can be saved for at least 50 years.

3.3D creation is more practical.

Mechanical designers always conceive before expressing when designing. Because the product shape in their minds is three-dimensional, it is naturally an ideal expression to directly establish a three-dimensional solid model reflecting the real geometric shape of the product. This can make mechanical designers pay more attention to the product design itself rather than the graphic performance of the product, which is in line with the innovative consciousness of mechanical designers. Because the three-dimensional drawing obtained by CAD three-dimensional design is intuitive and easy to understand, it can not only promote the thinking of mechanical designers, but also facilitate the expansion of design and communication with others. Three-dimensional mechanical design can not only describe the geometric characteristics of the object, such as shape, size and position, but also give the design object a variety of information, such as color and texture, so as to realize the accurate mathematical description of the geometric shape of the design object and the physical simulation of the working state, thus expressing the designer's intention more fully, accurately, comprehensively and truly.

3, the shortcomings of CAD technology

At present, the three-dimensional models made by some units with CAD three-dimensional software are only renderings, which are not used for overall space design and stress analysis, but only turn manual drawing into computer drawing. If we just stay at this stage, we will lose the role of CAD in aided design.

Designers often pay attention to the parts of the design, and CAD drawing has a certain influence on the overall grasp, which makes the partial mechanism of the whole and the proportion and volume of the building out of control. The accuracy of CAD stifles the fuzziness and randomness required for scheme design, and the design lacks inspiration. On the other hand, the limitation of CAD software function and the designer's proficiency in software make the designer's good inspiration and creativity unable to be expressed through CAD, and the designer's thoughts, ideas and inspiration are bound.

Not enough designers are proficient in CAD technology. Most people don't have special training and don't know enough about its functions, but today, with the rapid development of science and technology, the pace of your learning will never keep up with the pace of upgrading computers, peripherals and CAD software.

Secondly, CAD wastes more materials and financial resources. If a college wants to realize microcomputer drawing, its hardware equipment, such as computer, workstation, plotter, copier, scanner, digitizer, digital camera, CD-ROM, UPS, etc. , will spend a lot of money, and its software investment is also very high, plus operating system software and common office software, its cost is amazing.

4. Development trend of 4.CAD technology.

With the improvement of computer performance, the popularization of network communication and the intelligence of information processing, CAD technology will inevitably have an unimaginable development. Personally, according to the information searched, I think CAD technology may have several major development trends:

(1) With the rapid development of hardware in touch screen technology, the future development of 3D CAD technology will be closely combined with the development of hardware to develop more flexible design software. By clicking and sliding the fingertip (or stylus) on the touch screen, the design of points, lines and surfaces can be realized conveniently, so as to realize the design of products by engineers. With the support of this technology, you can design and modify it at will according to your own design ideas.

(2) Drawing lessons from the development of game technology, on the one hand, the designed products are more realistic (real-time rendering technology) and closer to the final manufactured products; At the same time, we can learn from the rocker technology to achieve better operation. On the other hand, the perfect combination of 3D printing technology and CAD technology will quickly shorten the cycle of product design and improve the quality of product design.

(3) With the development of network technology, engineers can realize collaborative design in different places through the Internet, such as drawing approval (circled red) and countersigning.

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