Abstract: Based on a brief description of the application and development of computer technology in welding production informationization, and the use and classification of welding engineering application software, the author introduces the welding production expert system and welding structural parts (matching) that the author has participated in in recent years. Welding (connection) computer-aided process planning CAPP system and welding production quality information management system and other aspects of welding engineering application software. And pointed out that the welding engineering application software has extensive development and application prospects.
1 since computer technology and welding production information <br> <br> half a century, computer technology was a great development and wide application, penetrated into all fields of national economy, into the political, economic, defense and human social life All aspects of the promotion of information technology in all walks of life. The development of network technology has further promoted the informationization process, enabling information to be centrally managed, transmitted at high speed, and easily shared, improving the utilization and security of information. At present, most computers are used as tools for information storage, processing, processing, and transmission, except for a small number of computers that are still used for numerical calculations.
In the past 20 to 30 years, computer technology has also been widely used in traditional machinery manufacturing, such as computer aided product design (CAD), computer aided process planning (CAPP), computer aided manufacturing (CAM), computer aided information management system. (MIS), office automation (OA), etc., integrating and integrating these technologies constitutes a computer integrated manufacturing system (CIMS).
The application of computer technology has made the traditional machinery manufacturing industry undergo a revolution, which has led to its development towards advanced manufacturing technology. Since the promotion of CIMS and CAD application demonstration projects from the national â€œ863â€ and â€œNinth Five-Year Planâ€, China has made considerable progress in manufacturing informationization. On this basis, the state put forward the goal of â€œinformatization-driven industrializationâ€ during the â€œTenth Five-Year Planâ€ period. The Ministry of Science and Technology organized the implementation of key technologies research and application demonstration projects for manufacturing informatization to accelerate the process of manufacturing informationization. The China Machinery Industry Federation held the "Informatization Conference on Machinery Industry Enterprises" in Beijing in September 2002 to further promote enterprise informationization in the machinery industry.
As an indispensable processing technology in the mechanical manufacturing industry, welding technology has also suffered from the huge impact of informationization. In order to promote the application of computer technology in the field of welding, national and international welding associations (IIW) have held special academic conferences. The British Welding Institute (TWI) held an international conference on "Computer Technology in Welding" in 1986 and held 13 meetings in 2003. At the same time, the American Welding Society (AWS), the Welding Research Institute (AWI), and the National Institute of Standards and Technology (NIST) have organized similar meetings since 1986 and held the 13th meeting in Orlando in 2003. These conferences generally include expert systems, simulation and simulation, manufacturing process automation, management and education software, and have increased the content of network applications and integrated manufacturing in the past two years. In 1988, the theme of the 41st Annual Meeting of the International Welding Society (IIW) in Vienna was â€œComputer in Welding Technologyâ€. Since then, almost every year at the IIW XII Professional Committee meeting, there have been reports on the research and application of computers in the field of welding and the development of welding engineering application software. The theme report of the 47th annual meeting of the IIW held in Beijing in 1994 was titled â€œWelding in the Information Ageâ€. In addition, the â€œWelding Numerical Analysisâ€ working group was established in the IIW IX Professional Committee.
The China Welding Society established the â€œNumerical Simulation and CAD/CAM Research Groupâ€ in 1986 and later renamed it â€œComputer Application Technology Professional Committee (CAW)â€. The professional committee held two academic conferences in 1987 and 1988, and held a special conference on "welding expert system" in 1989. In 1992, 1996, 2000, and 2004, the National "Application Technology Exchange Meeting of Computers in Welding" jointly held by the China Welding Association and the Welding Society was held four times. In 2001, the â€œwelding and ITâ€ symposium was organized at the 10th National Welding Conference. The content of these conference exchanges and discussions reflects the extensive work of computer applications and informatization carried out by many academic units and manufacturers in China over the years in the field of welding research and production.
The expert system work in the field of welding began in 1985. The statistics of the International Welding Society (IIW) indicate that the countries that carry out research and development work in this area include China, the United Kingdom, the United States, Japan, Germany, France, Denmark, Sweden, etc. , related to process design or process selection (including welding materials or welding method selection), welding defects or equipment fault diagnosis, welding crack analysis, welded structure fracture evaluation, welded structure fatigue performance analysis, welding preheating and post-weld heat treatment requirements, welding Cost estimation, real-time monitoring, welding CAD (fatigue design, symbol drawing, etc.), welder exams, and education and training multimedia software for welding technicians and welders.
Many countries have established welding-related databases since the 1980s, such as welding base metal chemical composition and performance databases, welding material chemical composition and performance databases, welding CCT libraries, and welding-related standards and regulatory libraries. And constantly updated and expanded. In addition, the electron beam welding, gas shielded arc welding and spot welding simulation systems (EBSIM, MAGSIM, SPOTSIM) developed by the Welding Research Institute of the Aachen University of Technology in Germany can easily calculate the shape of the weld under specific welding conditions.
In addition to the informationization of a high-quality weld formation process, the welding industry informationization concern of the welding industry includes the informationization of the whole process of welding structure production. For example, welding structural parts welding computer-aided process planning (WCAPP), welding production construction management, welding production quality management.
2 welding engineering applications and use classification <br> <br> engineering applications include the welding of two different types:, microprocessor-based control applications class and one is directly related to the welding or cutting apparatus; the other It is a microcomputer-based information and document processing application software that is independent of welding and cutting equipment. But usually it usually refers to the latter.
The International Welding Society (IIW) proposed a classification method for welding engineering application software based on the use of the software (Table 1). However, the welding software for the same application often has multiple varieties due to the different development units and the scope of use and the national standards and industry specifications, and the differences between them may be large. For example, the same welding process information and document storage software are very different when used in arc welding, electric resistance welding or electron beam welding, laser welding, and because of the development purpose and the development technology used, such software can It belongs to the database class or the expert system class and is fundamentally different.
Table 1 Classification and use of welding engineering application software (IIW)
In order to make a large number of welding engineering application software more reasonable, the Japan Welding Society (JWS) and the Japan Welding Engineering Association (JWES) proposed another classification method based on the survey of more than 200 welding companies in 1994. (Table 2). Relatively speaking, the classification method proposed by Japan can better reflect the diversity and particularity of welding software. For example, the spot welding parameter calculation software developed by Japan DAIHATSU Automobile Company belongs to A4 (welding device and system control, that is, the fourth sub-item in category A, the following are similar) B6 (welding power supply and equipment automation) C3 (calculation) D6 (resistance welding) E4 (automobile) class. However, it is difficult to include a wide variety of welding application software even with the classification method proposed by Japan. However, it can be seen that the scope of application of welding software is extensive, and the development direction of welding engineering application software can be deeply understood.
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