【正文】 laser powder sintering prototyping (SLS)。 Jilin Gold Grid Engineering Research Center of the stamping die mold CAD / CAE / CAM systems . xxx大學(xué)畢業(yè)設(shè)計(jì)（論文） 13 (2) mold design, analysis and manufacture of threedimensional Twodimensional mold of traditional structural design can no longer meet modern technical requirements of production and integration. Mold design, analysis, manufacturing threedimensional technology, paperless software required to mold a new generation of threedimensional, intuitive sense to design the mold, using threedimensional digital model can be easily used in the product structure of CAE analysis, tooling manufacturability evaluation and CNC machining, forming process simulation and information management and sharing. Such as Pro / ENGINEER, UG and CATIA software such as with parametric, featurebased, all relevant characteristics, so that mold concurrent engineering possible. In addition, Cimatran pany Moldexpert, Delcam39。 products factory mold factory or workshop, in order to supply the product works as the main tasks needed to die。 in the application of CAM technology manufacturing molds, first, the lack of advanced manufacturing equipment, and second, the existing process equipment (including the last 10 years the introduction of advanced equipment) or puter standard (IBM PC and patibles, HP workstations, etc.) different, or because of differences in bytes, processing speed differences, differences in resistance to electromagic interference, working is low, only about 5% of the mold manufacturing equipment of recent work in this task。 Mould Industry Status Due to historical reasons for the formation of closed, big and plete enterprise features, most enterprises in China are equipped with mold workshop, in factory matching status since the late 70s have a mold the concept of industrialization and specialization of production. Production efficiency is not high, poor economic returns. Mold production industry is small and scattered, crossindustry, capitalintensive, professional, mercial and technical management level are relatively low. According to inplete statistics, there are now specialized in manufacturing mold, the product supporting mold factory workshop (factory) near 17 000, about 600 000 employees, annual output value reached 20 billion yuan mold. However, the existing capacity of the mold and die industry can only meet the demand of 60%, still can not meet the needs of national economic development. At present, the domestic needs of large, sophisticated, plex and long life of the mold also rely mainly on imports. According to customs statistics, in 1997 630 million . dollars worth of imports mold, not including the import of mold together with the equipment。s, mold industry focus is based on subscriber demand, production can meet the product requirements of the mold. Multidie design rule of thumb, reference has been drawing and perceptual knowledge, on the design of mold parts of a lack of real understanding of function. From 1955 to 1965, is the pressure processing of exploration and development of the times the main ponents of the mold and the stress state of the function of a mathematical subbridge, and to continue to apply to onsite practical knowledge to make stamping technology in all aspects of a leap in development. The result is summarized mold design principles, and makes the pressure machine, stamping materials, processing methods, plum with a structure, mold materials, mold manufacturing method, the field of automation devices, a new look to the practical direction of advance, so that pressing processing apparatus capable of producing quality products from the first stage. xxx大學(xué)畢業(yè)設(shè)計(jì)（論文） 5 Into the 7039。xxx大學(xué)畢業(yè)設(shè)計(jì)（論文） 1 齊齊哈爾大學(xué)畢業(yè)設(shè)計(jì)（論文） 外文文獻(xiàn) 學(xué) 院 xxxxxx 專業(yè)班級 xxxxx 學(xué)生姓名 xxxxx 指導(dǎo)教師 xxxxx xxx大學(xué)畢業(yè)設(shè)計(jì)（論文） 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 level of industrial development die, so die industry to national economic and social development will play an increasing role. March 1989 the State Council promulgated on the current industrial policy decision points in the mold as the machinery industry transformation sequence of the first, production and capital construction of the second sequence (after the largescale power generation equipment and the corresponding power transmission equipment), establish tooling industry in an important position in the national economy. Since 1997, they have to mold and its processing technology and equipment included in the current national focus on encouraging the development of industries, products and technologies catalog and to encourage foreign investment industry directory. Approved by the State Council, from 1997 to 2020, more than 80 professional mold factory owned 70% VAT refund of preferential policies to support mold industry. All these have fully demonstrated the development of the State Council xxx大學(xué)畢業(yè)設(shè)計(jì)（論文） 3 and state departments tooling industry attention and support. Mold around the world about the current annual