Central South University Professor Zeng Tao, spiral bevel gears can only be processed through the 5-axes machining completed. But the Henan University of Science and Technology, Professor Deng allegiance to think, four 4-axis machine interaction in the development of the Cutting adjustment methodology adopted corresponding software can be completed processing the same tasks.
Two different points of view sparked such an issue: should China is committed to research and development in the end of 5-axes machine, or should further improve the linkage four 4-axis machine? Two points of view point of contention is: in the end which road China Machine Tool Industry fit more practical. Therefore, the authors were recently interviewed two professors telephone.
Professor Tang: no support for domestic research with foreign ass run
"I do not deny that the five machine interaction in the processing advantages, but do not support the large number of domestic investment funds tracking foreign technology, with others in the lead after running in favor of linkage through the development of four 4-axis machine tools, out of a quasi-surface machining gear Innovation Road (double-helical surface of the gear A bevel gear, in order to reduce the center of gravity, car rear bevel gear transmission ratio used mostly large quasi-hypoid gear, in the general foreign 5-axes machining). "Professor Tang said," the only way to the technical control from others. "
Tang said that judging from foreign imports in 5-axes CNC bevel gear cutting machine tools, precision machining and although Cutting efficiency high, but it is expensive, only a small number of domestic enterprises can afford to buy. Because of the high cost, more than 95% of current domestic prospective hypoid gear or using traditional mechanical gear milling machine processing. Although the development of the domestic 5-axes CNC milling machine prototype, but has not yet put into use, the main reason is that the 5-axis CNC system was abroad embargo, and domestic driver software is not ripe, processing algorithm to be well adjusted.
China with independent intellectual property rights and the linkage of 4-axis CNC milling machine has been on the market volume sales, such as Tianjin heartfelt Machine Manufacturing Company developed four simultaneous axes CNC bevel gear milling machine, the current law can be used to Hob processing spiral bevel gear and associate hypoid gear. But unfortunately, because of the absence of a corresponding adjustment of Cutting method is not yet use by forming quasi-surface machining gear.
According to the briefing, which is loyal to Deng Henan University of Science and Technology Institute gear for the National Natural Science Fund project. The Institute for China with independent intellectual property rights on the 4-axis CNC milling machine interaction, through detailed theoretical analysis and experimental research, development and application of the adjustments Cutting processing software, with their own intellectual property rights and enhancing our CNC milling machine performance, it can use dual-forming method of quasi - Surface gear.
Professor Zeng: Gear big country to become powerful gear
In the "car after Bridge spiral bevel gear manufacturing development direction and countermeasures," a text of Professor Zeng discussed in detail that is fully functional 5-axis CNC milling machine design necessary and sufficient conditions. 4-axis machine tools has long been the linkage of using low-grade CNC system that can not be rolled over, it is a single processing method, is too far behind, unable to meet the demand of China's auto industry development.
Spiral bevel gear drive axle of a vehicle in the key parts, "11th Five-Year Plan" is facing a good opportunity for development. But on the other hand we see that China is now the scene of the use of spiral bevel gear milling machine is more than 90% mechanical milling machine, the control method is basically still in the last century abroad 70 to 80 age level, with foreign advanced digital manufacturing, a considerable distance. To make our gear as soon as possible by the manufacturer into gear power, has stressed: "We should work hard to keep up with the pace of development, active research and development with their own intellectual property 5-axis CNC milling machine and CNC grinding machine, and to create the conditions in our country as whole Tooth and milling processes of the dry cutting process. "
To Professor Zeng as Chief of Changsha in Hunan experts from the Chinese University of invasive equipment NC Limited, in late April 2005 the Beijing International Machine Tool Show launched YK2050 CNC bevel gear grinding machine to fill the gap in our country, not to break the domestic production of high-end of the bevel gear machine and concluded a since the straight world's most high-end machine equipment from foreign companies monopoly situation.
Said, as long as careful study, independent innovation, we will be able to create China's national brands. This will enable our country to become a truly powerful gear.
Spiral bevel gear high demand
Spiral bevel gears are aerospace, automotive navigation and core components, and the auto industry is a pillar industry in China. According to China Association of Automobile Industry Ministry of Information Industry statistics, in 2006, has experienced two years of steady growth, the automobile industry once again showed faster development trend. Vehicle production and sales both more than 7.2 million, respectively, to 7.28 million and 7.22 million, respectively, year-on-year growth of 27% and 25%, to the "11th Five-Year Plan" late, China's auto output will reach 8 million to 10 million. This pair of bevel gears quantity and quality requirements will increase year by year, especially auto parts industry will further accelerate the development.
According to the World auto giant projection, in 2007, in low-cost countries for the procurement of spare parts will reach 50 billion US dollars, 70% of which will come from China, China will face huge export opportunities. Therefore, only in the shortest possible time, the most effective use of research and development of China's independent production of CNC machine tools, production of manufacturing precision and quality of qualified meshing gears to seize the initiative and seize business opportunities.
Tao Zeng said, 5-axis and 4-axis milling linkage is the difference between tooth confidential knife not dumping, dumping is a 5-axis cutter, knife dumping is not four simultaneous axes. They like the difference between black and white TV and color TV, TV effects certainly better than the black-and-white effect. In his view, in the end should develop four simultaneous axes 5-axis machine tools or machine is not necessary to argue, the market will make a choice.
According to reports, China Automotive Engineering Society gear Committee will be Sept. 12 to 14 in Qingdao held different views will be fully exchange, I believe it will create more conducive to the healthy development of this industry constructive comments.
