The CNC technology of large-scale turbine runner blades was successfully developed
Information and dynamic simplicity is the development direction of the manufacturing industry. Programmable logic controller inventor Molly et al. Just published it is the general direction of the future development of the manufacturing industry. Before personal microcomputers were widely used, programmable logic controllers were a key component in the manufacturing process. They replaced a large number of traditional switches and relays, allowing people to control the production line at the video terminal to adapt to changing needs. Although the development of modern computer software makes this controller gradually withdraw from the market, Molly believes that the essence of his invention is to show people the “simplicity” of design.
Nowadays, the processing workshop of the factory has increasingly used computers and other new technologies, but simplifying the manufacturing and use process is still the main direction of various technological improvements.
The author of the book believes that technology developers and managers should focus on these issues when developing products in the future: first consider the three “rules of ten”, that is, when developing any new product, this product must function better than existing products. 10 times, 10 times cheaper than the price of existing products, or 10 times faster in operation. Secondly, there must be a 7-year payback period, that is, for many technical projects, it takes 7 years from the principle of the proposal to the significant return. Time, so technology development and management personnel must use such a time frame to think about problems and lay out the timetable for research and development. Third, five factors must be considered. To make the manufacturing industry successful, they must be careful in their work planning. Consider the five major factors of management, sales, production, capital and technology.
High-precision, high-speed prototype processing technology using 3D solid model CAD/CAM. In the development of new products, the design prototype needs to be evaluated at each stage. The evaluation scope is from the appearance of the product to the final functionality. Each evaluation uses prototype parts made by skilled craftsmen that are different from the actual materials used.
These parts do not have sufficient accuracy and physical properties, so the final Mold must be used to obtain a satisfactory evaluation. Because the mold needs to be modified, it is difficult to shorten the development cycle. Using a high-speed, high-precision machining center and a three-dimensional solid model CAE/CAM system, the rapid processing technology of aluminum mold manufacturing and prototype machining has been developed. Precise prototype parts made of actual materials can be applied to various short-term evaluations of less modified molds to realize concurrent engineering.
Manufacturing is the biggest engine of the US economy The National Association of Manufacturers of America published a report on the status quo of US manufacturing on January 12, which showed that manufacturing was the biggest driving force for US economic growth in the 1990s.
The report stated that the achievements of American manufacturing in the 1990s were far greater than in the 1980s.
From 1992 to 1997, 29% of the real GDP growth in the United States came from manufacturing, making the manufacturing sector the largest contribution to US economic growth. In the same period, the service industry’s contribution to economic growth was 19%, the retail and wholesale industries were 16% and 13%, the finance, insurance, and real estate industries were 13%, and the transportation and economic growth rates were 3.1%. The average annual growth rate is as high as 5 The manufacturing industry is also the main force that promotes technological progress in the United States. Statistics show that 57% of all U.S. research and development investment comes from manufacturing, of which investment from three industries: transportation equipment, electronics and chemistry account for 38%. Due to the vigorous development and adoption of new technologies, the labor productivity of the manufacturing industry has also increased. It improves.
Since 1983, the labor productivity of the manufacturing industry has grown at an average annual rate of 3.4%. After entering the 1990s, the growth rate of labor productivity in the manufacturing industry has further accelerated, exceeding 47% from 1996 to 1999, and the increase in labor productivity has further driven the US economy Overall growth.
The contribution of manufacturing to the growth of the US economy is also reflected in exports.
From 1992 to 1998, 24% of the US economic growth was attributed to the increase in exports.
Among the total exports of the United States, the manufacturing industry accounts for 62%. In 1985, only about 7% of the manufactured goods produced in the United States were exported abroad. At present, this proportion is close to 15%. In addition, the report said, The multiplier effect of the US manufacturing industry, that is, the production activities of intermediate products and services brought about by the manufacturing process, is also significantly greater than that of other sectors. For every dollar of final sales in the manufacturing industry, it can bring $1.19 in the production of intermediate products and services, while the service sector can only bring in 77 cents. In addition, every US$1 million in sales of manufactured goods can support 10 jobs in the manufacturing sector and 6 jobs in other sectors, while the labor-intensive service industry can support 17 service industries per US$1 million in sales. Jobs, but only two jobs can be created in sectors other than the service industry.
The numerical control technology of large-scale turbine runner blades was successfully developed. The technical staff of Dongfang Electric Co., Ltd.* recently successfully developed a complete set of large-scale blade numerical control machining in the main “basic research on key technologies of the Yangtze River Three Gorges Hydrogenerator Unit”. Technology.
“Technology” is one of the key technologies in the world’s power generation equipment manufacturing industry. The “Five-axis Cnc Machining technology for large-scale hydraulic turbine runner blades” developed by Dongfang Electric Co., Ltd. The results include the five-axis CNC machining of large blades. Data preprocessing system, computer three-dimensional modeling, five-axis coordinated CNC machining process, five-axis coordinated tool position technology for five-axis coordinated CNC machining, cutting simulation of five-axis coordinated CNC machining, machine tool simulation, post-processing for five-axis coordinated CNC machining The main key technologies. From the perspective of research and development and technical level, it has generally been in the domestic market and reached the international advanced level.
The promotion and application of this technology is of great significance to the manufacture of Three Gorges units, to promote the technological progress of the water turbine unit industry, and to improve the competitiveness of my country’s hydropower equipment manufacturing industry in the international market, and has broad prospects for promotion.
New vertical cutting center Taiwan Longfeng Precision Machinery Co., Ltd.* recently launched a vertical cutting center model VMC-158.
The body of this cutting center uses stress-treated high-grade cast iron, and the fine public industry is Takzu and Heihe accounted for 3% w. During this period, the beauty of the prison blish degree uf sex is the e4s heavy-duty design.
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