In recent years, China's wind power industry continues to improve, the annual and cumulative installed capacity of new double for four years, wind power installed capacity in 2010 ranked second in the world.cast bronze China's wind power industry to promote the rapid development of domestic wind power equipment rapidly increase the level of domestic production, also contributed to the rapid development of related domestic industries.
The main components of wind turbine requires a lot of precision machining, high-end CNC machine tools and cutting tools,bronze bushing wind power equipment, processing technology, relies heavily on advanced machine tools and cutting tools and precision. Electrical equipment,dry bushing together with the upper hand most of relatively poor environmental conditions, which also made the related equipment with higher processing requirements. plain bearing Therefore, advanced manufacturing technology and equipment, particularly machine tools and tool is an advanced wind power equipment manufacturing industry is the fundamental guarantee to upgrade.
Wind power equipment manufacturing in the relevant enterprises, whether management or technical personnel, sleeve bushing are expressed on the machine tool equipment, wind power and other advanced processing equipment, a strong dependence. Transmission of wind power equipment, for example, the main by the box, planetary gear train and the speed change mechanism and other components, gear box is a large box, and its complex structure, various components of processing require different tools and tool to complete. MW wind power equipment the majority of sub-transmission structure, DU bushing Boring and Milling CNC machining is required, large horizontal machining centers and gantry machining centers, machining high precision.bushing Large size, big modulus gear and ring gear need to use CNC milling machine and CNC forming forming grinding processing. Among them, the CNC milling machine is forming requires large depth of cut, large feed and high-speed rolling, CNC forming grinder required accuracy level 5 or above, and requires self-aligning, automatic measurement,brass bushing automatic modification and high degree of automation, etc. high stability.
In the case of wind power equipment in the transmission process, CNC Boring and Milling Machine, large horizontal machining centers, Mould guide plate machining center, CNC milling machines and grinding forming and other technical content of the machine tool industry is currently relatively high-end equipment, has wind power equipment manufacturing enterprises of the technical staff made it clear that their companies are using these machines are imported advanced technology and high-end products.plastic bushing Thus, wind power equipment in the high processing requirements, the following can explain a number of cases.
Case 1: Large leaf processing, need CNC milling machine, such machines are large-sized non-metallic five-axis machine tool light, although less demanding precision, power and torque is also small, but the requirements of the machine is very high cutting speed , cutting speed generally require more than 30m/min. Rotor axis machining, horizontal milling requires large-sized composite grinding machine, conventional lathe to increase based on the function of milling and grinding, to achieve complete processing of a single setup. Motor vehicle manufacturing needs vertical milling complex machine, in particular, the processing of the stator under the trough, to the basis of the traditional vertical lathe milling and grinding capabilities increase, they too need to achieve in a single setup process to complete. The main components such as yaw body with inner and outer bearing large teeth and small gear and transmission equipment manufacturing, but also need some special tools for better equipment. Spindle, large-scale wind turbines and towers are structures, and difficult to process, the accuracy requirements are high and need special processing equipment specially designed, and both high-speed, high efficiency, intelligent, flexible, CAD / CAM automatic conversion, automatic detection, error compensation and automatic fault diagnosis and many other advanced features.
Case 2: Hub-based processing can be divided into parts to be processed with the leaf shaft holes of two parts. In order to obtain the optimal input and output ratio, car and plane by vertical boring and milling operation to process desktop is an ideal choice. Vertical lathe processing with rotary holes, has always been the most economical and efficient way of processing. Since the end position of the spindle hole there will be pin holes or threaded holes, in order to avoid another fixture, the legislative vehicle to be used with drilling and milling functions, the Diamond Head with the cooling device is normally in order to ensure the drilling efficiency. Department for processing angled blade and spindle wheels, planing needs of desktop milling machines equipped with special fixtures, the fixture and the blade angle, wheel angle of the same, by automatically or manually rotating blade position. There is also need for boring and milling machine with the cold, the coolant pressure 1Mpa above, the machine speeds above 2000r/min, mainly on account of part of the efficient processing of small diameter holes.
Case 3: belonging to the long axis of the spindle rotary parts, most of the processing is done on the sleeper. The choice of the tool interface, a variety of sleeping car, a four-turret, pole plate and so on. Are generally coarse harsh car conditions, to demand the tip of the impact resistance, and also requires high metal removal rate, this case can be used to process circular blade. Remove the sleeper, the deep hole drilling and boring and milling machine for spindle machining floor is also very important. The biggest difficulty lies in generating the spindle groove under the efficient milling, processing, milling and slot straight into the next trough forming milling step, and both indexable milling cutter with the form, which can reduce device power and torque requirements.
Case 4: Turning rotary bearing bore, face, cylindrical, roller, etc. are set to complete the car. For efficient processing gear, it is done on the gear milling machine. Bolt through hole in the center of vertical drilling completed. Because wind power on the slewing gear accuracy is not strict, usually from 9 to 10 can meet the requirements, so the teeth will be reduced to rough machining, precision milling steps. For rough milling, machine tool rigidity and fixtures in the case of rigid better able to feed more than 400mm/min amount of machining, precision milling feed rate can be greater. Base is a typical structure, with two clamping gantry milling machines to complete processing. Flange similar to processing equipment and slewing ring, but the connection flange of the materials are mostly low-carbon steel, drilling is not easy to chip breaking.
Several cases of this process can be seen, the wind power equipment parts and components for machine tool, tooling and process requirements can be tough to describe. As the saying goes, "Gongyushanjishi, the first of its profits" in the wind power equipment manufacturing industry, in order to produce qualified durable wind power equipment, machine tools, cutting tools and processes such as hardware and software facilities are crucial. How best to balance wind power equipment, various factors involved in processing and further processing of the wind power equipment parts with the best processing technology, will no doubt become wind power equipment manufacturing eternal pursuit.