What Is cnc lathe – The Define Of CNC Lathe
Heavy-duty CNC machine tools are mainly used for large, extra-large precision parts processing, is for national defense, aerospace, shipping, energy (thermal power, hydropower, nuclear power, wind power), transportation (railways, automobiles), metallurgy, engineering machinery and other major industrial pillar industries and national engineering projects.
At present, China’s independent development of heavy machine tools and super heavy machine products to meet the needs of some national projects, and repeatedly create the world’s most extreme specifications.
Such as China has manufactured the processing diameter of 25m super heavy-duty CNC vertical milling lathe, boring bar diameter 320mm floor milling and boring machine, processing width of more than 10m CNC gantry boring and milling machine, rotary diameter in more than 5000mm CNC heavy horizontal lathe and a number of independent intellectual property rights, and the technical level has been close to the world’s advanced level of heavy machine tools series products.
The competitiveness of CNC machine tools
In the face of other varieties of machine tool market in the financial crisis under the rapid decline in the heavy machine tool market is almost unaffected by this incentive to make many machine tool manufacturers have turned to the market better large heavy machine tool market. The reason is that in the field of heavy machine tools, international competitiveness is relatively not intense, so that domestic heavy machine tool enterprises in some product markets successfully achieved the replacement of imports.
- Heavy gantry machining centre development trend is high power, high torque, high composite as well as complex hole surface processing capabilities. In the world to see, on behalf of the highest level of heavy gantry machining centre is the German Waldrich Coburg company’s products, North a machine tool is used by the German Waldrich Coburg technology. Heath (SCHIESS) and Coburg machine tools compared, whether in power, torque, specifications are basically equivalent, but the Heath company’s machine tool spindle speed is high, good precision maintenance, in technology is a high level. Compared with other products at home and abroad, foreign heavy cutting capacity, high machining accuracy, and has many technical advantages, such as beam processing profiling technology, Z-axis ram length compensation technology, gantry frame X-axis mobile double motor, three motor or even four motor synchronization technology.
- The main domestic manufacturers of floor milling and boring machines are: Kunming Machine Tool Factory, Qiqihar Second Machine Tool Factory, Jinan Second Machine Tool Factory, Wuhan Heavy Machinery Factory, etc. Foreign manufacturers of floor milling and boring machines mainly include: Italy’s PAMA, Germany Heath, Italy’s INNSEBERARDI company, the Czech Republic’s SKODA company, etc.
- CNC gantry mobile and table-top turning and milling centres abroad, the main manufacturers are Germany Coburg, Italy Pietro Carnacci, the United States Gigan, Germany Scharman company, these companies have many years of experience in the production of major machine tools.
Domestic development and research is still at an early stage, the technology is not mature enough. At present, the domestic machine tools are to varying degrees with low load-bearing capacity, low precision, low load and other shortcomings. - Heavy-duty CNC lathe CNC single column mobile vertical milling lathe is the key equipment of Wu Chong for processing the hydraulic turbine of Three Gorges Project, representing the production capacity and level of China’s super heavy-duty machine tools, marking China’s independent intellectual property products to reach the world’s advanced level, becoming one of the few super heavy-duty machine tool suppliers in the world. It also lays the foundation for the design and manufacture of more milling-turning compound machine tool series.
In addition, the CNC heavy horizontal lathe designed and manufactured by Qi Heavy NC is a supporting equipment for the Three Gorges Project provided by Harbin Electric Machinery Factory, with a processing diameter of 4.3m, a processing length of 18m and a maximum load of 250t, and the machine tool can realize automatic workpiece measurement and in-machine tool setting. In the processing of the Three Gorges turbine rotor, a workpiece weighing 200t is clamped at one time to complete the ‘total processing’ of the workpiece. The successful development of the machine tool marks the heavy horizontal lathe manufacturing capacity to a new level.
The advantages of heavy-duty CNC machine tools
In the past two years, China’s heavy-duty CNC machine tools are the fastest growing, such as heavy-duty CNC gantry boring and milling machine, heavy-duty floor boring and milling machine, heavy-duty vertical and horizontal lathes, etc. The annual production and market consumption has ranked first in the world.
The rapid development of heavy machine tools is a direct reflection of the large demand for heavy equipment manufacturing in China’s electric power, ships, petrochemicals and mines. A number of new products such as CNC double gantry boring and milling machine, gantry turning and milling machine tools, dynamic beam exchangeable table can change the milling head five-sided gantry machining centre and other successful development; key technologies, such as hydrostatic guide and hydrostatic bearing technology, synchronous control and motion compensation technology, five-axis linkage technology, high-power double swing angle milling head and heavy rotary table technology breakthroughs, marking the development of China’s heavy machine tools to reach a new This marked a new level of development for China’s heavy machine tools.
Beijing First Machine Tool Factory began manufacturing the largest single machine output value (87 million yuan / unit) of super heavy-duty CNC gantry boring and milling machine, a number of the world’s most super heavy-duty machine tools have been put into development, will guide China into the world’s heavy machine tool manufacturing powerhouse.
Wuhan Heavy Machine Tool Group made XKD type super heavy-duty CNC double gantry boring and milling machine, and put into self-use. The machine tool is double gantry mobile type, 4 milling head, gantry width 6.8m, processing length 57m. double gantry mobile type 4 milling head structure is the first in China.
Qi Heavy CNC Equipment Co., Ltd. successfully trial production BVDM315 × 5MC type vertical milling and drilling centre, the machine tool with double column gantry frame structure, double tool holder double 24 tool magazine, the centre spindle out of the water function, speed up to 5000r/min, hydrostatic guide rotary table C axis function, table diameter 3150mm, positioning accuracy 5″, the maximum processing diameter 3150mm, the workpiece weighs 20t, the machine tool for large wind power bearing processing, to fill the domestic blank.
Qiqihar Second Machine Tool Group Company has successfully manufactured XK2127 type five-axis CNC dynamic beam gantry boring and milling machine on a trial basis. The machine tool uses long span heavy-duty ball screw and auxiliary devices, automatic accessory exchange device, spindle floating clamping device, beam hydraulic proportional balance and other new technologies, table 8000mm × 3000mm, spindle speed 5 ~ 2000r/min, servo motor power 24kW, can achieve multi-axis control, five-axis linkage.
Shenyang Machine Tool (Group) Co., Ltd. has successfully developed the GMC2060u bridge-type gantry five-axis machining centre. The machine tool has made a breakthrough in synchronous control and adjustment technology for X-directional bi-directional drive, five-coordinate linkage error compensation technology, overall machine structure and topology optimisation, and has made progress in high speed, high precision and high rigidity. The machine tool is widely used in the military industry.
Dalian Machine Tool Group Co., Ltd. made VX32 ~ 60 moving beam exchangeable table can be changed head five-sided gantry machining centre, using rolling linear guide, electric spindle and CNC double swing angle milling head. The machine tool has a new breakthrough in the design and manufacture of key technologies.
The world’s highest precision grinding machine
China’s first in the world to manufacture sub-nanometer precision machine tools, mainly in this paragraph: become the third country after the United States, Germany to master high-precision optical parts manufacturing and processing technology, but also the world currently has both magnetorheological and ion beam polishing equipment research and development capabilities of the country.
China’s precision on the world’s highest large CNC coiling machine, this thing is not a machine tool, but the technology and machine tools are very much connected, and belongs to the strategic level of super machine, its level directly determines the manufacturing process of submarines, the United States and Japan all submarines use the coiling machine are Sweden and Switzerland, mainly Sweden, and the world can do the coiling machine to the extreme of the country, is China and Sweden two countries. And including the coil machine has all the complete extreme manufacturing field, strategic super machine system of the country, the world, only our country a, no other!
In 2008, Qinchuan Machine Tool Group developed the VTM260 gantry milling-turning machining centre, which has a seven-axis five-linkage function and a high degree of compounding, and can achieve the functions of turning, milling and boring, drilling, tapping and turning threads in one clamping.
the gap between domestic and foreign products
Although China’s heavy-duty machine tool industry in recent years has made great progress, and made a welcome development. But in the high-grade heavy CNC machine tools or rely on imports, of which Germany and Italy’s products represent the world’s advanced level.
Domestic products and foreign products in the structure of the difference is not much, the use of new technologies are similar, but in the application of advanced technology and manufacturing process level and the world’s advanced countries there is still a gap.
New product development capacity and manufacturing cycle can not meet the needs of domestic users, parts manufacturing accuracy and machine precision maintenance, reliability still needs to be greatly improved, especially in the heavy machine tool supporting the CNC system, functional components, such as tool magazines, manipulators and two coordinate milling head and other components, but also need to meet the overseas manufacturers supporting.
Within the heavy machine tool manufacturing enterprises manufacturing capacity is very strong, but big but not fine, the main reason is still backward processing equipment, CNC rate is very low, especially the lack of high precision level of processing equipment. At the same time, the domestic enterprises generally have a lack of independent innovation, because the heavy machine tool single small batch of market demand characteristics, decided to technical innovation requirements are higher. Domestic heavy-duty CNC machine tool products and developed countries compared to the famous enterprises still exist a certain gap, the gap between the product level is mainly reflected in.
- The advanced level of spindle speed abroad has developed to a maximum of 3000 ~ 4000r/min, while the main domestic hovering in 800 ~ 1500r/min.
- Fast feed foreign advanced level up to 20,000 ~ 30,000mm/min, while the domestic mainly in 6000 ~ 10,000mm/min.
- Accuracy of foreign advanced level of positioning accuracy 0.015/1000mm, repeat positioning accuracy 0.003 ~ 0.007mm; domestic products positioning accuracy 0.025/1000mm, repeat positioning accuracy 0.01 ~ 0.015mm.
- Other machine reliability, stability of precision, composite multi-functional, flexible, intelligent aspects of less than foreign manufacturers, the appearance of quality also has a gap.
Domestic manufacturers, although slightly inferior to foreign advanced technology, but in the manufacturing capacity and price point has a great advantage, especially the super heavy machine tools have reached contemporary international advanced level. We believe that China’s heavy machine tool manufacturing with scientific and technological progress and hard work, will gradually narrow the gap.
