Computer-aided design (CAD) technology, as an important part of electronic information technology, promotes the development and transformation of scientific research results, promotes the renewal and transformation of traditional industries and disciplines, realizes design automation, and strengthens enterprises and their products in the market. A key high technology that accelerates national economic development and national defense modernization is also an important technological foundation for the further development of computer integrated manufacturing (CIMS). Broadly speaking, CAD technology includes 2D engineering drawing, 3D geometric design, and limited Meta-analysis, numerical control processing, simulation, product data management, network database, and integrated technologies of the above technologies (CAD/CAE/CAM). CAD application engineering is a high-tech and intensive large-scale system engineering related to the research, development and application of CAL technology. The implementation of the CAD application project indicates that China has made great progress on the road of "enterprise informatization and information enterpriseization." The use of CAD technology has fundamentally changed the content and methods of product and engineering design and manufacturing. This technology has become an important means for industrial advanced countries to maintain their competitive advantage and open up markets. With the increase in computer performance at the most advanced level, its price has decreased exponentially; with the popularization of network communication, the intelligentization of information processing, and the practical application of multimedia technology; the popularity and application of CAD technology has become more and more widespread. The deeper, CAD technology is moving toward open, integrated, smart, and standardized. Since the 1990s, technicians engaged in research and application development of CAD have recognized that the key to making CAD technology productive is to allow designers to use and use CAD systems. The State Science and Technology Commission has determined that the automation of drawing design is achieved through the engineering goal of “flip chart†as a breakthrough in the promotion and application of CAD technology. Today, many localities and enterprises have promoted CAD and achieved good results, but there are still some The issue is worth exploring. 1 CAD CAD that caused the design revolution is currently the most active field in computer applications. The design business mainly includes research and development ideas, basic product design, cost estimation, design drawings, and auxiliary work for design (such as product research, Designed to receive continuing education, participate in related academic meetings, etc.) Starting with 40% of the design time, computer-aided drafting not only serves as a way to reduce the designer's labor, but also leads to a "juicing revolution." CAD has resulted in the following changes in the design work: 1 Depth design work to an unprecedented depth: 2 Improve the speed and quality of drawing design; 3 Simplify the design process, and after connecting the computer to the product standard database, all component parts have been incorporated into the standard design Can realize the computer automatically gives the graph, the designer only needs to tell the computer to use the standard parameter to be possible: 4 designs the simulation and the design examination, uses the CAD three-dimensional graph function, on the computer screen to be possible to imitate the design product appearance state, At the beginning of the design, the product is optimized. Before the new product is put into production, the structure, processing, assembly, decoration and dynamic characteristics in the manufacturing process can be analyzed and tested, thereby improving the success of the product design; 5 The close combination of design and manufacturing, as mentioned above, CAD design data can be used to design simulation CAE, can also be linked through the data transmission system and numerical control processing equipment, the design data directly for product processing, that is, CAM, CAD The conversion from design to machining program can be done automatically. 2 CAD software advances into the personalized era Design and manufacture are the main links in manufacturing development products. CAD technology promotes the technological revolution in manufacturing industry. He cries out the traditional way, enabling people to efficiently develop products without drawing boards and drawings. Now, CAD technology has become an important indicator of a country's industrial level. With the continuous growth of application fields and people, higher requirements have been put forward for CAD software. The users of various industries are eager to get the most suitable CAD software for their professional needs. On the other hand, they hope to obtain professional services tailored for themselves from professional CAD manufacturers at reasonable and affordable prices. Industry users are eager to get personalized CAD products and services. CAXA's "Electronic Chart 2000", the first to be introduced, marks the beginning of the era of personalized software. "CAXA electronic board" fully takes into account the user's personalized needs, provides a professional and easy-to-use development platform, users can change the software according to their own needs, add functionality and even develop a new professional design software. “CAXA Electronic Board 2000†has now integrated mechanical, electrical and architectural design modules. Dozens of professional software development organizations have collaborated with CAXA to develop professional design software and will continue to integrate. In addition, CAX has launched a personalized service plan. Training, support and customization of products, changing the past "what does the company produce what to sell" ideas, and to "what does the user need, what we provide" for the purpose of targeting the user's applications and needs, for their personalization, let the software and The service is more suitable for the needs of users. The personalized products and services of "CAXA Electronic Board 2000" make high-tech software more popular. 3 Several problems with the application of CAD technology Networked networking is a current trend. CAD can use the network to achieve information sharing and bring great convenience to design work. It is necessary to talk about the networking of CAD software. Due to the large amount of real-time data exchange of CAD, adopting the host time-sharing system will reduce the design efficiency. The best solution is that each node can independently complete the design work, and the role of the network is the mutual invocation of related resources of each node. At the same time, due to the need of intellectual property protection, CAD software has its own encryption measures (such as key disk or dongle). Therefore, there are two cases in the implementation, one is to install only one dongle on the server, and the other is to install the dongle on each node. The former facilitates asset management. The latter can run independently from the network and have their own advantages. A network board like the CAXA electronic board provides three installation modes: full server installation, full workstation installation, and hybrid installation. The first mode is suitable for the diskless workstation network. All software is installed on the server. The node workstation has no hard disk: The inadequacies are the high network requirements, otherwise the operating speed is affected. The second mode requires the workstation to have a certain amount of hard disk capacity. There is basically no data exchange between the operating server and the workstation. The role of the server is only the software use permission control. The third mode is to install part of the frequently called programs on the workstations, and to install the library files with large hard disk space on the server, taking into account the operating speed, network communication, and hard disk space. Pattern. Intelligent intelligence is the inevitable development of CAD. The main feature of intelligence is that it can not only process data but also process knowledge. Its function is far beyond the scope of calculation. He can reason, optimize, select, judge, and make decisions. Such a system can reach expert level in solving problems. The expert system gas expert system is a practical application of artificial intelligence. As we all know, engineering design is a comprehensive task. Engineers use scientific methods, rely on their own accumulated experience, follow national norms, and use requirements and construction conditions to analyze, compare and determine the final drawings and text data. Express the process of designing products. The entire design process is an iterative process of gradual refinement. However, at present, most of the engineering CAD software developed by our country can only be designed for calibration and construction drawings, and it does not have the ability to think and make decisions. Intelligent CAD technology is a complex system engineering. It is a major subject of interdisciplinary research. It must be done by experienced engineering design experts and computer software experts in close cooperation with research and development. At present, the research of China's intelligent CAD system has just begun, there is no commercial software available. Therefore, on the basis of absorbing advanced foreign technologies, accelerating the development of high-level intelligent CAD software is also an urgent task for us. It will play a positive role in promoting the modernization of China's CAD application level and design methods. To really make products, projects and systems of good quality, low cost, and strong market competitiveness, we need to use the best design, the best processing, and the best management. It is very urgent to summarize domestic and foreign related products, Ding Cheng. And system design and manufacturing experience and lessons learned, the successful design and manufacturing experience made intelligent design, intelligent manufacturing system to guide the design and manufacture of new products, new projects and new systems, so that our products, engineering and systems can be innovative . Standardization is a very important part of the enterprise's technical work. When applying CAD technology, the enterprise's technical department should first revise or establish new standards for the company's own standards. The perfect CAD standard system is to guide our standardization management department to carry out CAD technology. The scientific basis for the decision-making of standardization work is the basis for developing and formulating relevant standards for CAD technology, and it is also a constraint method for promoting the popularization and application of CAD technology. Therefore, tracking international relevant standards in CAD application engineering, researching and formulating CAD standards that meet China's national conditions, And to effectively implement it is an important guarantee for promoting the continuous development of research, development, and application of CAD technology in China. The understanding of hardware and software usually, the use of CAD software is a professional and technical personnel, they care about the choice of CAD software can meet the needs of their work, whether it is easy to use, not much care about how the software is developed, and software Whether the function covers all areas of CAD, whether it reflects the latest results of CAD technology research, and system maintenance personnel are mostly computer professionals, they are concerned about whether the software has secondary development language interface, the system development language is what What kind of, and a software interface, etc. Some of the issues raised are out of step with the actual technical work of the company. Therefore, the selection of CAD systems should be based on the use of CAD system personnel. CAD's hardware requirements are higher than general word processing and management systems. In general, two-dimensional drawing needs more than 486 models, the main frequency speed is above 100MHz, and the memory is more than 4M (recommended 8M). The memory size will affect the operation speed. The graphic output is best to use inkjet plotter, according to the size of the company's drawings to match the size of the plotter. The secondary development of CAD software The so-called secondary development is to build some specialized application functions on certain tomb foundation software platforms (such as two-dimensional mapping software) to improve the system's professional pertinence and usage efficiency. For example, it can be used in CAXA electronic diagrams. A number of tool design calculations, data and graphics libraries are added to the board to form a highly specialized forming tool CA system. To enable enterprises to make good use of CAD systems and make them practically productive, it is necessary to provide companies with secondary development tools that are easy to learn and use, namely the development of specialized CAD software and databases for industry and enterprise applications. In addition to the traditional function library In addition to calls, Lisp language and C language development tools, system development units are required to provide technical support and training to users in a timely manner. Now, interactive dialogues and dialogues are used to prompt users to construct suitable industries. The CAD application system suitable for enterprises will be more friendly and popular with users. The training of CAD application talents The modernization of equipment requires the manipulation of high-tech personnel in order to play its due role and generate huge economic benefits. Only let designers master the advanced science and technology knowledge of CAD as soon as possible. In order to allow modern equipment to create the necessary economic and social benefits. At present, on-the-job engineering designers have professional knowledge of relatively abundant livestock through design practice, but lack of knowledge and ability to apply CAD technology has affected the popularization and application of CAD technology. CAD is a high and new technology. The human factor is extremely important. There is no relatively stable team with high technical level. It is empty talk to popularize and popularize engineering CAD technology. There are ten historical reasons in the design of the unit, and a considerable number of engineering designers are computer blind, not to mention knowledge of CAD technology. Therefore, first of all, we should make full use of the advantages of the CAD training center to carry out basic knowledge training so that everyone will use computers and everyone will master CAD technology. Only in this way can we get rid of the drawing board, only on this basis can we do high Level training and development training can be carried out in several ways: Send out a small amount of funds for training, select middle-aged and young technical personnel with strong business abilities to colleges and training bases for training. After the training comes back, it is the backbone of CAD technology application. Self-training For most technicians, self-training can be performed using off-produced or semi-produced methods. Computer professionals are required to teach computer basic knowledge and operating skills and improve the technical staff's computer operation level. Experts are invited to the factory for training. When most technical personnel in the company have mastered certain CAD technology and accumulated some problems, they need to invite relevant experts to the factory for on-site training. This step of training will improve the application level of CAD technology for enterprises. Very important.
Longlived 202 Stainless Steel Shot is widely used on stainless steel die casting parts, aluminium die casting parts for copper alloy casting parts and other non-ferrous alloy casting parts for surface treaning of shot blasting.
202 Stainless Steel Cut Wire Shot
Longlived 202 Stainless Steel Cut Wire Shot, also named 202 Stainless Steel Shot, is made from high quality 202 stainless steel.
Benefit from great quality and material, Longlived 202 Stainless Steel Shot has an excellent anti corrosion characteristic. Its chemical composition is as below:
|
C |
Si |
Mn |
P |
S |
Ni |
Cr |
N |
|
0.78 |
0.76 |
15 |
0.032 |
0.001 |
4.06 |
14.36 |
0.01 |
Longlived 202 Stainless Steel Shot is widely used on stainless steel die casting parts, aluminium die casting parts for copper alloy casting parts and other non-ferrous alloy casting parts for surface treaning of shot blasting.
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