The past two years, China's fastest-growing heavy-duty CNC machine tools, such as heavy-duty CNC gantry milling machine, cast bronze heavy duty floor milling machine, heavy duty vertical and horizontal lathes, and so the annual production and market consumption has been ranked first in the world.
From the international market, relatively heavy-duty machine tools not highly competitive field, bronze bushing this economy so that domestic enterprises in a number of heavy machine tool market successfully implemented import substitution.
(1) The development trend of heavy-duty machining center is a high power, high torque, high-hole complex, dry bushing and complex surface machining capability. In the world to see, representing the highest level of heavy-duty machining center is the company's products in Germany Fort, North Germany, a machine is used Fort technology. Heath (SCHIESS) compared with the Coburg machine, whether in power, torque, specifications basically equivalent,plain bearing but Heath's spindle speed, high precision to maintain good, technically belongs to the world leading level. Compared with other domestic and foreign products, foreign re-cutting ability, high precision, and has many technical advantages, sleeve bushing such as copying beam processing technology, Z-axis ram length of the compensation technique, the goal framework of the X axis dual motor, three motor even the four-motor synchronization technology.
(2) Boring and Milling domestic manufacturers are: Kunming Machine Tool Plant, Qiqihar Second Machine Tool Plant,DU bushing the second machine tool plant in Jinan, Wuhan Heavy Machinery and so on. Boring and Milling Machine manufacturers abroad are: PAMA, Italy, Germany Heath, Italy INNSEBERARDI company, the Czech SKODA companies. HORIMASTERHM3 standard products in addition to Kunming Machine Tool Factory rail rolling sliding compound, used in the McNair Machine Co., Ltd. and linear guide rail, the other major manufacturers are mostly hydrostatic guideway structure, statibushing c technology is relatively mature, HORIMASTERHM5 except Kunming Machine Tool Plant, a rolling sliding compound rail, the rest are static rails. Static pressure in the field of precision heavy-duty machine application is comprehensive, the advantage of stability and the overall machine rigidity, the disadvantage is the relatively high manufacturing cost and difficulty. In addition, the market mainly from the structure of the spindle with the use of ram and to increase the scope and function of the machining needs.
(3) mobile and desktop CNC Gantry Milling Machining Center with major manufacturers abroad, Coburg, Germany, Italy ,brass bushing the United States Kyrgyzstan root, Germany Salman companies, these companies have many years experience in the production of major machine tools . China is still the early stages of research and development, technology is not mature enough. Mould guide plate At present, the machine there are varying degrees of low carrying capacity, accuracy is not high, disadvantages such as low load, can not fully meet the overall needs of national development, especially in the military, aerospace and other industries is in need of such high-end products support. Free linear combination of coordinates and coordinates of the car round, boring and milling machining, you can also configure the reliable attachment, plastic bushing according to the requirements of users supported by a different degree of automation. Machine tools and accessories for the geometric dimensions of space requirements can be personalized according to the design process.
(4) heavy-duty CNC lathes CNC vertical milling lathe single column is moving heavy weapons for the processing of key equipment turbine of Three Gorges Project, representing the production of super heavy-duty machine tools capability and level, marking our own intellectual property products reach the world advanced level, of the few suppliers of one of the super-heavy machine tools, but also for the design, manufacture more complex milling machine series cars and laid a foundation. In addition, the design and manufacture of Qiqihar Heavy CNC heavy duty horizontal lathe CNC Harbin Electrical Machinery Plant for the Three Gorges project provided equipment, processing diameter of 4.3m, processing length 18m, maximum loading capacity 250t, the workpiece can be achieved automatically measuring machine, machine to the knife. Turbine rotor in the processing unit when the Three Gorges, a fixture weighing 200t of the workpiece, the workpiece to complete the entire process. The successful development of machine tools, heavy duty horizontal lathe manufacturing capacity marks a new level.
The rapid development of heavy-duty machine is China's electric power, shipbuilding, petrochemical and mining and other heavy equipment driven directly reflects the high demand. Ssangyong number of new products such as CNC milling machine door, gantry milling machine tool, dynamic beam milling convertible exchangeable table pentahedral gantry machining center developed; key technologies, such as static pressure and static pressure bearing technology guide , synchronization and motion compensation technology, five-axis technology, high-power heavy-duty double swing angle milling head and rotary table of the technology research breakthroughs have marked the development of heavy-duty machine tools to reach new heights.
Beijing First Machine Tool Plant began manufacturing output value of China's largest stand-alone (87 million yuan / unit) super heavy-duty CNC gantry milling machine, the current number of the world's most super-heavy-duty machine tools have been put into research and development, will guide China into the world of heavy-duty machine tool power column.
Wuhan Heavy Duty Machine Tool Group made XKD Ssangyong super heavy-duty CNC milling machine door, and put into use. The machine is mobile Ssangyong door, 4 milling head, gantry width of 6.8m, process length 57m. Ssangyong mobile portal is the first domestic 4 Head structure.
Qiqihar Heavy CNC Equipment Co., Ltd successfully trial BVDM315 × 5MC type vertical milling and drilling centers, the machine gantry frame structure with double-column, double-turret twin 24 tool magazine, the center spindle water features, speed up to 5000r/min, hydrostatic guideway C axis rotary table, table diameter 3150mm, positioning accuracy of 5 ", the largest processing diameter of 3150mm, workpiece weight 20t, the machine tool bearings for large wind power processing, and fill the gaps.
Second Machine Tool Group Qiqihar successful trial XK2127 fixed beam gantry-type five-axis CNC milling machine. The use of long-span heavy ball screw machine and auxiliary equipment, automatic attachment exchange device, the floating spindle folder knife device, a balance beam scale new technologies such as hydraulic, table 8000mm × 3000mm, spindle speed of 5 ~ 2000r/min, servo motor power 24kW, can realize multi-axis control, five-axis.
Shenyang Machine Tool (Group) Co., Ltd. successfully developed GMC2060u overhead gantry axis machining center. Machine in the X-way drive to control and adjust the synchronization technology, five-axis error compensation, the overall structure and topology optimization tools to achieve a breakthrough, high-speed, high precision and high stiffness is some progress. Machine parameters: X × Y × Z: 6300mm × 2500mm × 1000mm; spindle speed 240 ~ 24000r/min, fast-moving 30m/min, A-axis 95 ° ~ 110 °, C-axis ± 360 °. The machine is widely used in the military-industrial complex.
Dalian Machine Tool Group Co., Ltd. made VX32 ~ 60 table moving beam can be exchangeable for the first five-sided machining center, table length 2000 ~ 12000mm, width 1600 ~ 3000mm, bearing 30t, X × Y × Z: 7600mm × 4700mm × 1000mm, with linear guides, and CNC double spindle milling head swing angle. The key technology in the design and manufacture of machine tools there are new breakthroughs.
Qinchuan Machine Tool Group in 2008 developed the car VTM260 composite gantry-style milling machining center, machine tools, Five Axis has seven functions, high degree complex, a fixture can be achieved cars, boring and milling, drilling, tapping and threading and other functions. Table diameter 2600mm, maximum turning diameter of 3600mm, turning the main motor power 90kW, table car speed 1 ~ 100r/min, table milling speed 0 ~ 2r/min, milling spindle motor power 37kW, spindle speed of 1500r/min, C-axis positioning accuracy of 20. "
Domestic heavy-duty machine tools technology has become mature, and the level of foreign advanced technology gap is narrowing, it will break through the heavy-duty CNC machine tools of high-end production bottlenecks, to break the Western monopoly and constraints, to meet national security and national economic construction. Domestic manufacturing capacity has entered the world, and foreign manufacturers of heavy machine manufacturing capacity is being weakened. We should take the opportunity of key national projects, efforts to develop high-grade heavy-duty CNC machine tools, heavy duty CNC machine tools made in China to make greater contributions to meet the market demand.