Editor's note: There is a group of enterprises, small in size, but high-minded, with special skills, walking alone, known as "little giants". In Changsha, the "little giants" are like the stars arching the moon, deeply cultivating their respective fields, running out of dark horses in the industry, and becoming a dazzling light in the high-quality development of the city's industrial economy. The RedNet Changsha Station launched a series of reports "Attack on the "Little Giant"" to visit the "Little Giant" enterprises in many provinces and cities to explore their strength and potential.
A school of CNC machine tools for direct drive production.
A linear motor produced by direct drive.
RedNet Moment News Reporter Peng Chao reported from Changsha
Germany is known worldwide as a leading development partner and component supplier to the automotive industry. However, the CNC piston special-shaped external vertical lathe and the CNC piston special-shaped pin bore boring machine used were both purchased from an enterprise in Changsha Economic Development Zone, Hunan Province, and the two sides cooperated for 12 years.
The name of this enterprise is "Changsha Yipai Direct Drive Technology Co., Ltd." (hereinafter referred to as "Yipai Direct Drive"). Since 2010, the average annual sales of these two machine tools sold to Mahler in Germany have reached tens of millions of yuan.
CNC machine tools are the "crown" on high-end equipment and an important embodiment of a country's industrial level.
For CNC machine tools with a control accuracy of more than 2 μm, the linear motor is the preferred or necessary functional part. Linear motor does not need any intermediate transmission link, directly drives the movement of the object, has high precision, high speed, long life and other unique advantages, is the preferred functional parts of high-end equipment. The reason why a non-circular section CNC lathe with direct drive can reach the international leading level is that it has pioneered the use of linear motors on the machine tool, and has achieved the ultimate in related mechanical structures, linear drives, and computer control. In other words, the machine tool can control the motion accuracy to 1μm at an acceleration of 40g.
As early as 2000, foreign machine tool companies, such as Demaggi, began to apply linear motors around 2000 to improve the accuracy of machine tools. Even at present, the penetration rate of linear motors in the continental machine tool industry is relatively low, and in the machine tool industry in Europe, Japan and the United States, the application of linear motors is as high as 20%-50%.
"The super large thrust flat linear motor we developed is the first in China, and the main technical indicators have reached the international advanced level." Zhu Genghong, the founder and chairman of a direct drive, proudly told reporters.
It is worth mentioning that a direct drive maintains a lean team, the number of employees of the enterprise is more than 100, of which R & D personnel account for up to 30%, which belongs to the technology-based enterprises that rely on hard power. In the past 24 years since its establishment, the company has developed and produced more than 100 models of linear motors. Linear motor is one of the core components of a direct drive production of machine tools, independent research and development and production for enterprises.
After years of accumulation, a school of direct drive CNC machine tool products include all kinds of CNC piston special-shaped external lathe, CNC piston special-shaped pin hole boring machine, piston automatic production line. Its linear motor products include iron core flat linear motor, ironless U linear motor, customized linear motor, EDA series servo drive platform, linear servo platform and so on. Not only has it been done to replace imports, but even comprehensive technical indicators have caught up with imported products. From 2019 to 2021, the compound growth rate of the company's linear motor sales revenue exceeded 50%, becoming the leader in the field of linear motor research and development in China.
"At present, the domestic linear motor is mainly used in the 3C field, and the share of high-end equipment is still very small." Zhu Genghong said frankly, "This means that there are still huge market opportunities for a direct drive." We will also unswervingly develop and promote linear motors in China, which is the mission of revitalizing the national industry that Chinese enterprises must shoulder. ”
In the next step, a direct drive will explore the application of linear motors in the fields of rail transit, construction machinery, and textile machinery. "The development goal of the enterprise is to be a specialized and new representative of this field and strive to be listed on the Beijing Stock Exchange next year." Speaking of this, Zhu Genghong's tone was firm.