【正文】 ology, basically a blank state, based on the need for a lot of standardization work。 in the application of CAE design and analysis of mold calculation, it was just started, most of the game is still in trial stages and animation。s plastic molding mold design, production technology started relatively late, the overall level of low. Currently a single cavity, a simple mold cavity 70%, and still dominant. A sophisticated multicavity mold plastic injection mold, plastic injection mold has been able to multicolor preliminary design and manufacturing. Mould is about 80 million times the average life span is about, the main difference is the large deformation of mold ponents, excess burr side of a large, poor surface quality, erosion and corrosion serious mold cavity, the mold cavity exhaust poor and vulnerable such as, injection mold 5um accuracy has reached below the highest life expectancy has exceeded 20 million times, the number has more than 100 chamber cavity, reaching the mid 80s to early 90s the international advanced level. mold Present Status of Technology Technical level of China39。s national economy in the weak links and bottlenecks constraining sustainable economic development. 7 Research on the Structure of industrial products mold In accordance with the division of China Mould Industry Association, China mold is divided into 10 basic categories, which, stamping die and plastic molding two categories accounted for the main part. Calculated by output, present, China accounts for about 50% die stamping, plastic molding die about 20%, Wire Drawing Die (Tool) about 10% of the world39。 in 1997 only 78 million . dollars export mold. At present the technological level of China Die amp。s mold industry and its development trend Die amp。 from Japan in the early 80s will be threedimensional cad / cam system for automotive panel die. Currently, the physical parts scanning input, map lines and data input, geometric form, display, graphics, annotations and the data is automatically programmed , resulting in effective control machine tool control system of postprocessing documents have reached a high level。s, mechanical and electronic technologies in close connection with the development of NC machine tools, such as CNC wire cutting machine, CNC EDM, CNC milling, CNC coordinate grinding machine and so on. The use of puter automatic programming, control CNC machine tools to improve the efficiency in the use and scope. In recent years, has developed a puter to timesharing by the way a group of direct management and control of CNC machine tools NNC system. With the development of puter technology, puters have gradually into the mold in all areas, including design, manufacturing and management. International Association for the Study of production forecasts to 2020, as a means of links between design and manufacturing drawings will lose its primary role. Automatic Design of die most fundamental point is to establish the mold standard and design standards. To get 5 rid of the people of the past, and practical experience to judge the position of the design center, we must take past experiences and ways of thinking, for series, numerical value, the number of typebased, as the design criteria to the puter store. Components are dry because of mold constitutes a million other differences, to e up with a can adapt to various parts of the design software almost impossible. But some products do not change the shape of parts, mold structure has certain rules, can be summed up for the automatic design of software. If a Japanese pany39。s to high speed, launch technology, precision, security, development of the second stage. Continue to emerge in this process a variety of high efficiency, business life, highprecision multifunctional automatic school to help with. Represented by the number of working places as much as other progressive die and dozens of multistation transfer station module. On this basis, has developed both a continuous pressing station there are more slide forming station of the press bending machine. In the meantime, the Japanese stand to the world39。 and Switzerland, fine blanking, cold in Germany extrusion technology, plastic processing of the Soviet Union are at the world advanced. 5039。 metals, plastics, ceramics, rubber, building materials and other industrial products, most of the mold will be pleted in more than 50% metal plates, more than 80% of all plastic products, especially through the mold into. 3 2 The historical development of mold The emergence of mold can be traced back thousands of years ago, pottery and bronze foundry, but the largescale use is with the rise of modern industry and developed. The 19th century, with the arms industry (gun39。 in aircraft, automobiles, agricultural machinery and radio industries, the proportion exceeded 60%. Such as aircraft manufacturing, the use of a certain type of fighter dies more than 30,000 units, of which the host 8000 sets, 2020 sets of engines, auxiliary 20 000 sets. From the output of view, since the 8039。 畢業(yè)設計論文 外 文 翻 譯 2 Die history 1 Die position in industrial production Mold is a highvolume products with the shape tool, is the main process of industrial production equipment. With mold ponents, with high efficiency, good quality, low cost, saving energy and raw materials and a series of advantages, with the mold workpieces possess high accuracy, high plexity, high consistency, high productivity and low consumption , other manufacturing methods can not match. Have already bee an important means of industrial production and technological development. The basis of the modern industrial economy. The development of modern industrial and technological level depends largely on the