The Outline of the National Medium- and Long-Term Science and Technology Development Plan (2006-2020) clearly stipulates that major scientific and technological projects of “high-end CNC machine tools and basic manufacturing equipment” should “focus on the development of high-end “CNC machine tool”, “gradually improve the independent development capability of China’s high-end CNC machine tools and basic manufacturing complete sets of equipment to meet the basic needs of domestic major industries for manufacturing equipment.” The special implementation plan proposes that by 2020, it will form the independent development capability of the main products of high-end CNC machine tools and basic manufacturing equipment. The overall technical level will enter the international advanced ranks, and some products will lead the world. Establish complete R&D capabilities of functional components and support facilities; form a technological innovation system with the enterprise as the main body and a combination of production, education and research; train and establish a high-quality R&D team; manufacture aerospace, marine, automotive and power generation equipment institutes 80% of the high-end CNC machine china tools and basic manufacturing equipment needed are in China.
In order to more accurately and comprehensively grasp the latest development of the industry, to further understand the needs of key users and the development of the machine tool industry, and to provide a reference basis for special implementation, the China Machine Tool Industry Association was commissioned by the Industrial Development Department of the National Development and Reform Commission and organized more than 30 Industry experts. From June to July 2008, under the leadership of the main leaders of the Machine Tool Association, a special survey was conducted on 61 companies and institutions in the aviation, marine, automotive, power generation equipment and machine tool industries, with a total of 4 research groups. Through in-depth on-site surveys and communication between industry users, we have a clearer understanding of the development of these user industries, the characteristics of typical components and the needs of equipment.
The CNC industry involved in the CNC industry
The structural features of typical parts in the aviation industry are a large number of thin-wall structures with complex shapes. In order to improve the maneuverability of the aircraft, increase the payload and range, reduce the cost, carry out lightweight design, and widely use new lightweight materials, the performance requirements of the materials are becoming higher and higher. At present, aluminum alloys, high-temperature alloys, titanium alloys, high-strength steels, composite materials, engineering ceramics, etc. being widely used. Thin-walled components and honeycomb components with complex structures have complex shapes, many holes, cavities, grooves, reinforcing ribs, etc., and have poor process rigidity.
According to the structural characteristics and processing requirements of the processed parts in the aviation industry, there are five-axis linkage machining centers with A, B swing angles or A, C swing angles, high-speed machining centers, large double vertical machining centers, large CNC gantry boring and milling machines, Precision CNC lathes, large CNC precision vertical turning centers, turning and milling complex machining centers, blade disc high-efficiency machining centers, end face arc grinders, high-speed rotor blade tip grinders, slow-feed powerful grinders, broaching machines, related electrical machining machines, Laser cladding china cnc machining tools, multi-mode and multi-point forming presses for plate-shaped parts, directional single crystal melting furnaces, electro-hydraulic beam current equipment, etc. is compulsory. The machine tool requires sufficient rigidity, simple operation, and clear man-machine interface. In order to reduce the impact on corner machining accuracy, spline interpolation and uniform process control are required, and online measurement and simulation functions are required.
Shipbuilding industry involved in CNC lathes
The key processing parts of large ships are concentrated on the base, frame, cylinder block, cylinder head, piston rod, cross head, connecting rod, crankshaft, gearbox transmission shaft, rudder shaft and propeller (propeller) of the high-power diesel engine. The key processing parts are made of special alloy steel, usually processed in small batches, and the processing yield is required to be 100%. The key processing parts have the characteristics of heavy weight, complex shape, high precision and difficult processing. The processing of key parts of large ships requires heavy-duty, super-heavy-duty CNC machine tools and high-power, high-torque, high-reliability special processing machine tools, as well as multi-axis, heavy-duty, super-heavy-duty CNC gantry boring and milling machines, large-scale cyclone lathes, and CNC heavy-duty gantry milling And heavy duty CNC floor boring machine, CNC lathe, grinder, deep hole drilling machine, large steel plate stamping, pickling, heat treatment and flame cutting machine. The processing of heavy and super heavy crankshafts and large propellers is typical, requiring super heavy CNC special machine tools and super heavy multi-axis linkage machine tools.
CNC industry involved in CNC machining
The production line of automobile engine and body stamping parts has the characteristics of continuity, high efficiency and high reliability. The automotive industry desperately hopes that machine tool manufacturers can specifically study the technical characteristics of auto parts, and through mutual communication with the automotive industry, jointly develop a set of modular, serialized, turnkey flexible production lines.
The flexible production line undertakes the processing of key machining parts such as automobile engine cylinder block, cylinder head, crankshaft, connecting rod, camshaft, box body and so on. As an object. It is a modular rapid assembly reconfigurable production line suitable for mixed flow production. Mastered the integrated technology of performance evaluation, error tracing, quality control and management. Developed high-speed precision machining centers, precision boring machines, cylinder bore precision grinding machines, crankshaft dynamic balancing machines, crankshaft rolling machines, connecting rod up-and-down machines, crankshaft internal and external milling machines, crankshaft high-speed grinding machines, etc. High-speed picking robot and auxiliary equipment, such as cleaning machine with deburring function, handling robot, laser welding machine, cylinder liner press-fitting machine, online testing equipment, etc. High-speed horizontal machining centers, CNC lathes, CNC grinders and other CNC machine tools require stable accuracy and reliable performance, and the CMK value index needs to be greater than 1.67.
CNC industry involved in CNC machining
The key components of power generation equipment are heavy, special in shape, high in precision, difficult to process, and expensive. The price of a single piece far exceeds the price of heavy-duty CNC machine tools. For example, the pressure vessel of a nuclear power plant weighs 400-500 tons, and the rotor of a large steam turbine and generator weighs more than 100 tons. It requires more than 30 years of reliable work. Therefore, the machine tools required to manufacture key components of power generation equipment have the characteristics of large specifications, high rigidity and high reliability. Need to provide a variety of ultra-heavy CNC machine tools and special machine tools, such as large CNC vertical lathes, large CNC horizontal lathes, CNC milling china and boring machines, gantry boring and milling machines and machining centers, CNC drilling machines, large stamping equipment and CNC pipe bending machines. For some specific machining parts, the machine tool requires multi-axis-controlled five-axis linkage and compound machining functions.
