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Analysis and Discussion on the development strategy of China's machine tool industry

Source:中国机械网 Number of visits: Date:July 17,2012

The world's first CNC machine tools is the production of aircraft propeller blade profile design and production, it is a revolutionary breakthrough in the process of the development of manufacturing industry, marking the beginning of NC Manufacturing in the field of processing times.

 

"The rapid development of China's aerospace industry has promoted the development of related industries such as machine tool industry, on the other hand, many of the parts of the processing and ultimately dependent on the machine tool to realize, between the two complement each other. "Industrial international machine tool exhibition recently held in Beijing, coincides with the nine gods of space travel, in a field experts issued a call for the aerospace industry forum, equipment manufacturing industry as the" machine tools ", the machine tool industry should provide excellent equipment mission, countries should strengthen guidance, enterprises should also go to the positive response.

 

The urgent demand of digital manufacturing

 

"The world's first CNC machine tools is the production of aircraft propeller blade profile design and production, it is a revolutionary breakthrough in the process of the development of manufacturing industry, marking the beginning of NC Manufacturing in the field of processing times. "Little Giant Machine Tool Co., Ltd. chief engineer Huang Jianwen think, NC machining is the basis of modern manufacturing technology, its invention in particular the development of aerospace industry for the manufacturing industry, is of epoch-making significance.

 

Digital manufacturing and research of Flexible Assembly Technology Laboratory of Beijing Research Institute of Aviation Engineering director Liu Huadong think, the demand trend of the aviation industry is at the stage of rising, the future aircraft, especially the manufacturing model aircraft, are asking for precise manufacturing parts for the support, the implementation of zero allowance assembly, requirements on the separation process, such as surface butt gap will be more stringent, the that requires extensive use of CNC machine tools. Some new materials (such as composite materials) applications, but also put forward new, higher demand for CNC machine tools.

 

It is reported, the characteristics of aerospace industry product parts is high temperature resistant, high strength, difficult processing, and alloy material and composite material, complicated structure, high technological requirement. Aircraft fuselage structure main beam, frame, rib, siding and other parts, such parts for most of the aluminum alloy or titanium alloy material, the general outline dimensions are large, the whole frame structure is a thin wall multi cavity, mechanical cutting removal of large volume, high surface quality requirements. Processing of such parts need to be large, heavy machine tool equipment, requirements table bearing 10 tons, high rigidity machine in 15 meters above the effective stroke.

 

Key parts of aircraft engine with compressor, combustion chamber, turbine, such products more parts for composite material of high temperature alloy or high temperature, generally shaped annular structure, poor rigidity, high precision, complex shape, large processing difficulty. Processing of such parts need to be big, medium-sized multi function, high precision CNC machine tools, equipment having high flexibility, excellent online measurement of CNC system, powerful, station, tool magazine capacity, such as large precision CNC vertical turning center, five axis machining center and multi axis NC milling in Longmen, also in view of the development of high performance engine impeller impeller machining special purpose machine.

 

Aircraft landing gear generally use the forging blank of high strength steel by mechanical processing and. Forging gear needs ton press needed blank, processing, large CNC boring and milling machine, five axis linkage processing center equipment in Longmen. Airborne parts product variety, structure is complex, a variety of materials, the performance of different. The processing of such parts need more function of the NC machine tool, small in compound with high accuracy and high speed CNC milling machine, such as high precision vertical, horizontal machining center and high precision car, milling, grinding compound machining center machine tool equipment.

 

Information technology must link to the island

Aviation information expert Feng Ziming that, in addition to the domestic digital manufacturing capability structure of NC machining technology and equipment to form, sheet metal forming, complex digital manufacturing technology material component manufacturing, aircraft assembly and corresponding production equipment are not perfect, precision forming, automatic laying, flexible assembly and automatic drilling & riveting technology is in the application study stage, has not yet formed a batch of stable production capacity.

 

More crucial is, digital manufacturing technology and quality control of unbalanced development of technology. At present, aircraft quality control method lags behind the development of manufacturing technology, personnel quality and ability and does not match the current in-depth application of digital manufacturing technology. Detection means is not advanced enough, pieces of the structure in addition to NC machining with CNC measuring machine detection, other parts and fittings basically still rely on manual inspection tooling, precision and accuracy to meet customer requirements.

 

In view of this situation, people association Luo Baihui think, in addition to develop multi-functional composite machine tool, should also be coordinated balanced development in host machine and CNC system, functional components, cutting tool and measuring equipment, improve the product function, the key to improve the equipment of independent development and manufacturing ability is crunch time. Equipment service in the process, as the close integration implementation of processes and equipment, machine tool enterprises must understand and be familiar with the user process, dynamic focus on the user's manufacturing process technology development, accurate market positioning for products, research and development to meet the new requirements of the user equipment. Strive to provide to the user of the machine equipment at the same time, the overall solution also provides technology, to enhance the competitiveness of enterprises and products.

 

"In order to manage large and complex system, with the aid of the developed computer software, hardware technology in aviation manufacturing industry, to solve the design and the management problems, but in the process of processing equipment parts manufacturing has encountered bottleneck - distributed in the country and the world are unable to integrate into the network, information related to the manufacturing process of complex parts in cannot feedback to the network, such that each manufacturing enterprise equipment becomes an information island, application and development of hindered digital technology in aerospace industry. "Huang Jianwen said, because the manufacturing process of aerospace parts is very complicated, how to manage and run very difficult, for a long time, the network application of CNC machine stays in the application by computer to the machine tool transmission procedure, machine parameters and machining parameters and the original, apparently CNC machine tools which are difficult to keep up with the times pace, unable to meet the needs of today's intelligent, networking and informatization. "Therefore, it is very necessary for digital manufacturing. Digital manufacturing initially mainly used for product design, then gradually to the process, programming, virtual machining, tool preparation, production planning and process control the direction of development, at present the new generation with intelligent, networked CNC system interactive programming method is an important development direction. "

TypeInfo: Industry News

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