CNC gear processing industry to speed up the structural adjustment

As we all know, gears are the most basic mechanical transmission components and have a wide range of applications. The gear machine tool is one of the products with the highest technology content, the most components and the most complex structure in the machine tool industry. But once our country's gear machine industry was in a very embarrassing situation. In the past, China's machine tool manufacturing enterprises were relatively backward in technology and generally lacked independent innovation capability and key and core technical support. Their products mainly focused on the production of low-end products, lacking competitiveness, and the stability, reliability, and durability of the quality of CNC machine tools. Compared with foreign advanced products, there is a significant gap between the sexes. The author noticed that with the increase in the demand for gear processing machine tools, the number of companies involved in the manufacture of gear processing machines has also increased in recent years. In addition to the original Chongqing Machine Tool, Tianjin No. 1 Machine Tool Plant, Qinchuan Machine Tool, Nanjing No. 2 Machine Tool and other enterprises, there are also rising stars such as Hunan Zhongda Chuangyuan. Moreover, some companies such as Harbin, Weihai CNC also involved in the field of gear manufacturing machine tools. Not long ago, Harbin held the technical appraisal meeting of the H350G CNC spiral bevel gear grinding machine project. Invited the Academician of the Chinese Academy of Engineering, the deputy general manager of Shanghai Machine Tool Works Co., Ltd. Zhou Qinzhi to serve as the chairman, and the Honorary Chairman of the China Machine Tool Industry Association Yu Chengting attended.

Long Xingyuan used the phrase “low-end melee, high-end fall” to summarize the oversupply of low-end machine tools in the domestic market, while the demand for high-end products such as CNC precision gear machines was mainly dependent on imports because of the lack of domestic products. However, to this day, the use of this phrase to describe the situation of the gear processing machine industry is not very clear. First of all, as far as Qinchuan Group is concerned, its CNC 11-axis five-link automatic knife setting, automatic loading and unloading worm-type grinding wheel grinding machine, diameter 2m grinding machine, 7-axis five-motion spiral bevel gear grinding machine are all In the last three years, new world-class machine tools have entered the production of different batches. In particular, small-sized spiral bevel gear cutting machines (milled teeth and grinding teeth) can be applied to the automotive industry and military, tank, and boat industry; large-sized, eg 2m-diameter spiral bevel gear machines can be used for deep well drilling and Construction, mining machinery manufacturing. Secondly, the export of products is also a bright spot of Qinchuan Group in recent years. After exporting two large-sized forming grinders in Korea for the first time at the end of 2009, it also exported several CNC grinding machines and blow molding machines such as Korea, Holland, Malaysia and Indonesia in the first half of this year. Machines, whether it is in the number of machine tools and technical content have a major breakthrough.

Because the CNC gear processing machine is now one of the strengths of China's machine tool products, into a series of 6 axis (coordinate) five linkage CNC gear hobbing machine, wind power industry with a large internal and external tooth milling machine, heavy mining machinery industry with a processing diameter of 12m milling machine All have been successfully developed. China Machine Tool Industry Association told the author that from the China International Machine Tool Show this year, domestic CNC gear processing machine tool has a high satisfaction rate in the domestic market, but some high-end CNC gear machining tools also rely on imports, such as the gearbox of the fan, mainly It consists of a box, a planetary gear train and a transmission mechanism. The gear box body of the fan belongs to a large box body. According to the difference of the power generation capacity, the diameter is about 2~3m, most of which is a separate structure. In the processing, the CNC floor-landing milling and boring machine with the diameter of about 160-250mm, the large-scale horizontal machining center and the gantry machining center are required, and the machining accuracy is required to be relatively high. At present, the demand for such machine tools by the fan manufacturing enterprises still mainly depends on imports. In addition, due to the large amount of gears in the gearbox, mass production of large ring gears, spur gears, and helical gears is required. The main processing equipment is large CNC vertical gear hobbing machine, CNC gear shaping machine, CNC gear grinding machine and so on. Among these gear processing machines, the large-size ones generally require high efficiency, heavy load, heavy cutting, and good rigidity. Unfortunately, large-size gear processing machines currently rely mainly on imports, while domestic equipment can only achieve the processing of small and medium-sized gears.

Whether it is the traditional automobile, shipbuilding, aerospace, military and other industries, or emerging high-speed railways, railways, electronics and other industries in recent years, they have put forward urgent demands for the rapid development of the machine tool industry. This puts forward new requirements for manufacturers of gear processing machines. Now some companies have responded to the need, actively adjust the industrial structure, and constantly expand the application of products, providing high-speed, high-stability, high-precision new machine tools to the hot industry, to meet Industry needs.