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On December 24, 2008, as one of the 16 major national science and technology projects identified in the Outline of the National Medium- and Long-Term Scientific and Technological Development Plan (2006-2020), the “High-end CNC Machine Tool and Basic Manufacturing Equipment Major Project†was officially launched.
    According to the special plan, by 2020, 70% to 80% of the high-end CNC machine tools and basic manufacturing equipment required for aerospace, shipbuilding, automobile and power generation equipment manufacturing will be based in China. The special project basically supports the technological innovation of domestic high-end CNC machine tools in the form of project bidding.
    The expected target of this major special project is: By 2020, the independent development capability of the main products of high-end CNC machine tools and basic manufacturing equipment will be formed. The overall technical level will enter the international advanced ranks, and some products will lead the world internationally; establish complete functional parts research and development and supporting capabilities. Form a technological innovation system with enterprises as the main body, combining production, study and research; cultivate and establish a high-quality research and development team. In addition, major projects have also set phased goals for 2010 and 2015.
    The implementation of major special projects will rapidly improve the technology and manufacturing level of China's machine tool industry, and effectively promote the technological innovation and localization of domestic high-end CNC machine tools and basic manufacturing equipment. Among the many special projects, the successful development of the following iconic devices is representative.
1. The breakthrough in the research on cutting technology of "S" specimens
    Titanium alloy aerospace structural parts are the core bearing parts of aircraft. Due to the high strength of titanium alloy, small elastic modulus, severe plastic deformation, difficult chip removal, low thermal conductivity, high processing area temperature, high chemical activity, easy oxidation, and work hardening. Severe, closed-angle and thick-walled structures with complex curved surfaces have always been a problem that plagued China's domestic machine tools. Therefore, the “High-end CNC Machine Tool and Basic Manufacturing Equipment†technology special project “Five-axis linkage machining center for titanium alloy aerospace structural parts†is a priority project, which is set by Shenyang Machine Tool (Group) Co., Ltd., Tianjin University, Chengdu The aircraft industry (group) limited liability company "production, study and research" parties jointly implemented, through the analysis of heavy cutting stability, five-axis machine tool dynamic characteristics analysis and five-axis machining center post-processing core algorithm and post-platform development The technology researched and developed the first five-axis linkage machining center for complex titanium alloy aerospace structural parts processing.
Second, the CNC heavy-duty crankshaft milling machine composite processing machine tool was successfully developed
    The subject was undertaken and successfully developed by Qizhong Numerical Control Equipment Co., Ltd. It focuses on the key technology of “separate opening and closing CNC cyclone cutting tool holderâ€. It solves the technical problems of U-axis precision rotary motion, radial and longitudinal support, large and ultra-thin precision split cyclone cutters, new processes and new materials, and enables China to master heavy-duty marine crankshafts with independent intellectual property rights. The processing machine tool manufacturing technology has got rid of the situation that the large-scale marine crankshaft relies heavily on imports, and has met the demand for finishing equipment of the core components of the large-scale marine diesel engine, which has been developed by the state, and has promoted the sustainable development of shipbuilding industry, port transportation, steel and other related industries. , making China the third country in the world after Germany and Japan to independently design and manufacture crankshaft processing equipment.
Third, the large composite material component tape laying machine was successfully developed
    The large-scale composite component laying machine is one of the top ten landmark equipments of “high-grade CNC machine tools and basic manufacturing equipmentâ€, which is composed of Qiqihar Second Machine Tool (Group) Co., Ltd., Nanjing University of Aeronautics and Astronautics, Tsinghua University, Aerospace Materials and The research institute has successfully developed the technology. The project has obtained four major technological breakthroughs: primary and secondary spindle synchronous double drive technology, prepreg ultrasonic cutting technology, prepreg hot air heating technology and prepreg tension control technology.
    The results of the project have been applied to the automated manufacturing of key components of the Aerospace Materials and Process Research Institute in key industries, which can reduce manufacturing costs by 30% and increase production efficiency by more than one time. This has enabled China to make major technological breakthroughs in large-scale composite component laying machines. The development of major technical equipment in China.
4. Major breakthroughs in material smelting and forming control technology for large-scale high-quality castings
    “Material Smelting and Forming Control Technology for Large-Scale High-Quality Castings†is a key topic in the national science and technology major “High-end CNC machine tools and basic manufacturing equipmentâ€, which is led by China First Heavy Machinery Group Co., Ltd. This project produces large-scale steel casting quality control technology in new furan resin and slow curing agent and furan resin sand, rotor steel ultra-purification smelting technology, large-scale casting digital moldless assembly manufacturing technology, digital processing technology and moldless assembly. Process, stainless steel castings rapid manufacturing technology, the use of computer flow field, temperature field, stress field simulation technology, multi-inclusion casting technology of different chemical components and tundish castings for super large steel ingots have achieved a major breakthrough in technology research and development.
    It solves the bottleneck technology related to large castings and forgings that is urgently needed in China's machine tool and energy industry production equipment, and provides key common technical support for the main special host of high-end CNC machine tools.
V. Major key parts die forging technology has made a major breakthrough
    The research team focused on three major technical problems: First, the drafting process for large-sized complex shape preforms was overcome. Second, the performance control of die forging forging has been broken. Third, the thermal insulation technology of the die forging process has achieved significant results.
    The research results of this subject provide the production process guidance for the 800MN large die forging press, solve the basic technology and key technical problems of the large die forging process, and make the near net forming technology of our country reach the international advanced level, and make a large scale for the use of 800MN large die forging press. , high quality, overall aviation die forgings lay a good foundation.
Sixth, the super heavy-duty CNC horizontal boring lathe for supercritical nuclear power half-speed rotor machining was successfully developed.
    The super-heavy-duty CNC horizontal lathe machine tool specializing in the unit is Wuzhong. After on-site inspection and expert inquiry, the expert group gave the conclusion that the development of the machine tool successfully solved the processing problem of the localization of key equipment parts of major equipment in China, filled the domestic gap, and had completely independent intellectual property rights. The main technical performance has reached the international leading level of the current similar machine tools. So far, the machine has processed a total of 5 pieces of 1100MW nuclear power half-speed rotors and 6 pieces of super-heavy support rolls of 5 meters mills, which meets the requirements of foreign drawings design. Some main precision indexes are better than the drawing design requirements.
Seven, large-scale automatic rapid flexible stamping production line was successfully developed
    China has become a big automobile manufacturing country and a big consumer country. To develop the automobile industry, the country must give priority to the development of large-scale fast and efficient CNC automatic stamping production line, which is the world trend of automobile body stamping processing.
    The “Development and Development of Fully Automatic Rapid Flexible Stamping Production Line†undertaken by Jinan No. 2 Machine Tool is based on the 42000KN fully automatic flexible rapid stamping production line of GM Dongyue Automobile Co., Ltd., which is not only the first high-speed stamping production line with double-arm fast feeding system in China. It is also the first press line that fully implements European standards in the design and manufacturing process. Its production cycle can reach 15 pieces/min. It is the world's highest level of high-speed automatic stamping production line.
    The stamping production line not only meets the needs of quality, grade and upper level in China's automobile industry, but also participates in international competition on behalf of the Chinese stamping industry. In the international bidding with world-class enterprises, Jinan No. 2 machine tool included one of the five large-scale fast intelligent stamping production line order contracts of Ford Motor Company in the United States. This is the first time that Ford Motor has purchased a complete set of stamping equipment from non-German production in the past 20 years. This year, Ford reordered the product.
Equipment special promotion of China's machine tool innovation and localization process
Abstract Introduction: Machine tool is the mother of a generation of industry. At present, due to the late start of China, we have been in a weak position in the field of high-end CNC products. Therefore, in some major manufacturing industries, China will formulate specific development plans and special actions to promote industrial progress. The implementation of major special projects will...
Guide: Machine tool is the mother of a generation of industry. At present, due to the late start of the country, we have been in a weak position in the field of high-end CNC products. Therefore, in some major manufacturing industries, China will formulate specific development plans and special actions to promote industrial progress. The implementation of major special projects will rapidly improve the technology and manufacturing level of China's machine tool industry, and effectively promote the technological innovation and localization of domestic high-end CNC machine tools and basic manufacturing equipment.