Since the beginning of the 21st century, the process of national modern industrialization has accelerated, and the heavy industry has developed rapidly. There is an increasing demand for large size and high-precision spiral bevel gears. Large size and high precision helical gears have the advantages of strong bearing capacity, good transmission performance and high efficiency. They are the representative of domestic gear processing level and technology, and are widely used in petroleum, chemical industry, coal mine, automobile manufacturing, high-end machine tools and other fields. Discusses the types of processing technology of large specification and high precision spiral bevel gears, and puts forward the way to optimize and improve the processing technology of large specification and high precision spiral bevel gears. This research has reference value for improving the processing accuracy of large specification and high precision spiral bevel gears.
Foreign countries have achieved good application of large size and high-precision spiral bevel gears, which have a good reputation in the field of large machinery loading, and are important power support for mechanical transmission process. This type of bevel gear also has its applicable requirements. The diameter of the gear is more than 800 mm, and the precision of the finished gear is more than level 5, so as to ensure the working accuracy and application needs of the gear. The large specification and high-precision spiral bevel gears abroad were first born in a machine tool manufacturing enterprise in the United States, mainly used in the manufacturing of CNC machine tools. With the continuous development of technology, American companies have optimized and improved the processing technology of large size and high-precision spiral bevel gears. By improving the accuracy and grinding the gears by means of tooth surface grinding, the scope and effect of its application have been increased.
After the reform and opening up, domestic efforts to develop large specification and high-precision spiral bevel gears have generated strong demand for such products in many fields such as petroleum, chemical industry, automobile manufacturing, etc. Large-scale high-precision spiral bevel gears were first used in domestic oil processing, metallurgical manufacturing and mining fields, and played an important role in improving work efficiency and construction quality. Therefore, they have gradually been vigorously promoted in various production fields. However, the processing technology of large specification and high-precision spiral bevel gears has been sold by the method of necking in foreign countries. In the 1970s, domestic companies could only buy large specifications and high-precision spiral bevel gear products from German companies, and German companies were not willing to sell the products to the domestic market. Against the background of strong demand and sluggish supply, the research and development of large specification and high-precision spiral bevel gears has been intensified in China. The first large-scale high-precision spiral bevel gear in China is produced by Tianjin Jingcheng Machine Tool Co., Ltd. Although the precision of processing technology is somewhat lower than that of international products, it has opened up a precedent for domestic independent production and promoted the expansion and optimization of domestic production lines after the reform and opening up. In 2011, the world’s largest high-precision, full-automatic spiral bevel gear production line, as well as the first production line in China, was completed and put into operation in Hunan Zhuzhou Walde Special Gear Co., Ltd. The picture shows the world’s first set of high-precision spiral bevel gears with a diameter of 2 meters processed on the company’s production line.