Hardened involute gears Involute gear drives are the most widely used form of gear transmission in the world. In the 1960s, China's involute gears used hobbing processing. The gears produced by this method have low hardness, low contact strength and short life. In the 1980s, the former Ministry of Machinery Industry made a lot of work on the research and development of hard-toothed surface technology. The research institute and the factory combined the introduction and digestion of this technology, mastered the hard tooth surface grinding technology of the gear, and achieved gratitude. The result. At present, China can produce high-speed gearboxes with line speeds exceeding 125m/s, which solves the urgent need for major equipment in large-scale fertilizer and other industries.
Worm drive name type product manufacturing unit ring worm drive single enveloping cement equipment a=730mm, single screw compressor Zhengzhou Machinery Research Institute plane double envelop CNC grinding machine worm wheel hob Shougang Machinery Factory, Tianjin Huashengchang Gear Company plane Single Enveloping Large Telescope Transmission ISO12 Accuracy Zhengzhou Mechanical Research Institute Conical Worm Drive Involute Conical Worm A=2000mm, ISO45 Precision Qinchuan Machine Tool Plant, Chongqing Machine Tool Plant Arc Tooth Cylindrical Worm Drive Reducer Taiyuan University of Technology, Jiangsu Jingjiang Reducer Factory China introduced and digested Gleason cutting technology and machine tools from the 1970s. In the 1990s, the Oricon and Klingenberger cutting techniques were also studied. At the end of the 20th century, Qinchuan Machine Tool Plant and Changsha Railway Institute successfully developed the CNC spiral bevel gear cutting machine.
New Gear Materials Today's gears are made of steel, or a metal that expands. With the rapid development of materials science, many new materials will be used for gears. Polymer materials, such as plastics, have been applied to gears and will have more to do in the future. Ceramic materials have been used in engine cylinders and bearings. It is expected to be reflected in the gear transmission. Nanomaterials, smart materials, due to their special properties in physics, chemistry, mechanics, optics, etc., will play a wonderful and important role in the gear material family.
Gear Tribology As the requirements for gear units become higher and higher, tribology will play a more important role in reducing gear friction, reducing gear wear and improving gear lubrication performance. Compared to mechanical disciplines, tribology is an emerging discipline with more potential to dig. Tribological design will take lubricant into account. The design idea that the lubricant is a mechanical part will be reflected in the digital design of the gear. Modification techniques for gear surfaces, new lubricants, research on nano-lubricating additives, new lubrication methods and lubrication solutions in special environments will be hot spots.
The ability of independent innovation to improve China In order to become a world power in gear manufacturing, we must improve the ability of independent innovation and build world-renowned brands. At present, world-famous gear manufacturers have appeared in China, showing us advanced gear manufacturing technology and products, which is a good thing. But in the long run, we can't just be satisfied with becoming the world's gear manufacturing/production workshop. 0. We should also have the ability to occupy a place in the competition and become the world's gear manufacturing power/partner. China gear technology has developed over 40 years. Has formed its own unique technology, such as arc gear technology, plane double envelope toroidal worm technology and harmonic transmission technology. In recent years, it has developed a step-by-step involute gear transmission, point-line meshing involute gear transmission, bevel gear CNC machining machine. In the future, we must pay attention to the innovation of gear technology and obtain more innovative technology products with independent intellectual property rights.
Gear Green Manufacturing Technology China's gear manufacturing industry is a large industry with an annual output value of more than $3 billion. The manufacturing industry involves many industries such as energy, materials, metallurgy, and mechanical processing. While improving product quality and improving efficiency, we must pay attention to the design of the whole life cycle of the product, pay attention to the energy saving and environmental protection issues of various production links of the product and the problem of product recycling. At present, environmental protection problems in gear heat treatment process; high-speed dry cutting to improve efficiency and workpiece quality, eliminating the environmental pollution caused by coolant (lubricant); using precision casting, forging and other gear processing near net forming technology to save raw materials and reduce Cutting process, lubricating oil recycling, etc. are all hot topics. In short, the green manufacturing of gears is a major issue related to sustainable development. It is hoped that China in the future will be a big green gear manufacturing country.
Conclusion (1) The history of China's gear transmission can be traced back to 3,000 years ago, and it has written a glorious chapter in the history of gear transmission in the world. (2) Since the founding of New China, the development of China's gear technology has gone through four stages, and it has achieved great development and formed its own characteristics. (3) China has become a major gear manufacturing country in the world. Looking forward to the future and implementing information technology in the gear manufacturing industry will make China a powerful country in gear manufacturing.
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