Gear production technology and machining error

Gears are an important part of modern mechanical transmission. From national defense machinery to civilian machinery, from heavy industrial machinery to light industrial machinery, all gears are used. With the rapid development of industrial and agricultural production and science and technology in China, the demand for gears has increased significantly. Therefore, how fast and lean the production of gears has become an important part of the development of the machinery industry. In recent years, the ranks of workers engaged in gear production, especially the young workers, have developed greatly. According to different gear characteristics, the distribution is slightly different. The automatic transmission is completely controlled by foreign-funded enterprises and can only be used for gear matching. The general gearbox has a lot of foreign capital, and the German SEW is the main representative. The main domestic enterprises are mainly famous enterprises.

Special gearbox: State-owned enterprises occupy the main market.

High-speed heavy-duty gears: state-owned enterprises and foreign-funded enterprises.

The base circle of the gear is the only parameter that determines the shape of the involute tooth. If there is an error in the base circle during hobbing, the tooth situation must also have errors. The base circle radius R=hob moving speed/table rotation angular speed is the original tooth angle of the hob). During the hobbing process, the involute tooth shape mainly depends on the gear ratio of the hob and the blank. To ensure that, it can be seen that the tooth profile error is mainly determined by the hob tooth shape error, and the hob edge grinding quality is not good and the tooth profile error is easy to occur.

In 2008, medium-sized enterprises were grouped, and the output and sales of key enterprises accounted for more than 75% of the whole industry. Now there are more than 150 enterprises with annual sales exceeding 100 million yuan, and a group of enterprises with more than 1 billion yuan. The distribution of enterprises in the key areas divided into large and medium-sized sub-transmissions is mainly concentrated in: automatic transmission gears of automobiles: basic foreign monopoly.

According to China's "Eleventh Five-Year Plan for Development of Equipment Manufacturing Industry", "Special Plan for Major National Technical Equipment Development and Major Industrial Technology Development", and "Several Opinions on Accelerating the Revitalization of Equipment Manufacturing Industry", the goal of development in 2010 is China's equipment. The total economic output of the manufacturing industry has entered the top three in the world. In order to reverse the weak situation of the basic equipment and basic parts and components industry, as an important basic component of equipment in the equipment manufacturing industry, Dongguan gear industry is the basic industry of the machinery industry, and the importance of professional equipment. The composition will inevitably be provided on the industry support.