Central South University professor Zeng Tao believes that machining spiral bevel gear can only be done by Axes machining. But Professor of Henan University of Science and Technology Deng allegiance think, four four-axis machine tools Cutting after adjustment calculation method developed by the appropriate software can accomplish the same processing tasks.

Two different perspectives raises the question: in the end should be committed to the development of five-axis linkage machine, or should further improve the axis four-axis machine tools it? That the focus of debate two viewpoints: in the end which road is more fit the actual Chinese machine tool industry. To this end, I recently interviewed two professors were telephone.

Professor Tang: do not support domestic research along with foreign ass run

"I do not deny the advantages of five-axis machine tools in manufacturing terms, but does not support a large number of domestic investment funds tracking foreign technology, with others running in the rear end, and inclined to development axis four-axis machine tools, out of a hypoid gear machining path of innovation (a hypoid gears spiral bevel gears, in order to lower the center of gravity of the car, the car after the bridge spiral bevel gear transmission ratio most used hypoid gears commonly used in foreign axis Five linkage machining). "Professor Tang said," the only way to control someone else's technically not. "

Deng said that imported from abroad five-axis CNC spiral bevel gear cutting machines, although high efficiency machining accuracy and gnashing of teeth, but the price is expensive, there were only a few companies can afford. Due to the high cost, the current domestic hypoid gear or the use of more than 95% of the traditional mechanical milling machine processing. Although domestic production of the five-axis CNC milling machine prototype, but not yet put into use, the main reason is that axis CNC system by foreign embargo, while domestic driver software is not yet mature, processing algorithms need to adjust perfect.

The domestic with independent intellectual property rights of Axis CNC milling machines currently on the market in volume, such as Tianjin Jingcheng Machine Manufacturing Co., Ltd. developed Axis CNC spiral bevel gear milling machine, is currently able to use the roll Qiefa Jia Workers spiral bevel gears and hypoid gears. Unfortunately, the absence of a corresponding adjustment Cutting calculation method is not yet able molding process hypoid gear.

According to reports, the National Natural Science Foundation of China currently loyal Deng where the Henan University of Science and Technology Institute of the application has been approved gear. The calculation is based on the Institute to prepare China with independent intellectual property rights of Axis CNC milling machine, through intensive theoretical analysis and experimental research, development and application of adjustment Cutting processing software, to enhance China with independent intellectual property rights of CNC milling machines performance, making it possible to use the molding process hypoid gear.

Professor Zeng: gear big country to become a gear power

In the "car rear axle spiral bevel gear manufacturing development direction and measures" in one article, has taught in detail that is necessary and sufficient conditions for five-axis CNC milling machine fully functional design. Axis machine has long been used as a low-grade CNC system can not roll ratio correction, so it's working method is too simple, too far behind, can not meet the needs of the development of China's automobile industry.

spiral bevel gear as the vehicle drive axle of key parts, "five" is facing a good opportunity for development. But on the other hand we want to see, spiral bevel gear milling machine more than 90% are mechanical-type milling machine used in China is now the scene, the control method is basically still in the level of foreign 80s of the last century, 70 ~, and advanced digital manufacturing is still a considerable distance. In order to make our country by the gear manufacturing country into gear power as soon as possible, he stressed: "We should catch up, keep up the pace of development in the world, active research and development with independent intellectual property rights of axis CNC milling machine and CNC grinding machine, and To create conditions as soon as possible to achieve dry cutting process the whole law and the milling process in our country. "

In the chief expert Professor Zeng Hunan Changsha Daiso far NC Equipment Co., in late April 2005, Beijing International Machine Tool Fair launched YK2050 NC spiral bevel gear grinding machine, fill the gap, breaking the domestic status quo can not produce high-end bevel gear machine, and ended up has been the world's most high-end machine tools monopoly by foreign companies.

said, as long as careful research, innovation, we will be able to create a national brand in China. This will truly make our country become powerful gear.

spiral bevel gear demand steadily higher

spiral bevel gears are aerospace, marine and automotive industries, the core components, and the automotive industry is the pillar industry in China. According to the China Association of Automobile Industry Ministry of Information statistics, has experienced steady growth in 2006 after two years, the automotive industry once again showed faster development. Automobile production and sales both more than 7.2 million, respectively, 7.28 million and 7.22 million, an increase of 27% and 25%, respectively, to the "Eleventh Five-Year" end of China's auto output will reach 800 million to 10 million. Thus the quantity and quality requirements of spiral bevel gears will increase year by year, especially in the automotive parts industry will further accelerate development.

According to the world's auto giants forecast, before 2007, parts purchases in low-cost countries will reach $ 50 billion, of which 70% will come from China, China will face a huge export opportunities. Therefore, only in the shortest possible time, the most effective use of our self-developed production of CNC machine tools, production of manufacturing precision and quality are acceptable gear engagement in order to grasp the initiative and seize opportunities.

Zeng Tao said, five-axis and four-axis milling difference is not confidential knife tilt mechanism, there is a five-axis tilt knife, no sword is Axis tilt. The difference between them is like Colour and black and white TV, color TV effect is certainly better than black and white. He believes that in the end should be developed Axis or five-axis machine tools there is no need to argue, the market will make a choice.

It is reported that China Society of Automotive Engineers gear machining Committee will be held in Qingdao on September 12 to 14, when the exchange of different points of view can be fully, I believe it will generate more conducive to the healthy development of the industry's constructive comments.