With the increasingly fierce competition in the world, especially the continuous improvement of production costs, production technology, vehicle performance and parts quality requirements in the automobile manufacturing industry, the hydroforming process of pipes has begun to attract the attention of the industry. Mercedes-Benz Automobile Company established a hydroforming workshop for pipe fittings in 1993.
At present, General Motors, Ford, Opel and other automobile companies have established hydroforming production bases. BMW, Audi, Mercedes-Benz, Volkswagen, Chrysler, Volvo and other models have also adopted hydroformed parts for pipe fittings. Since 1997, TOYOTA, HONDA, NISSAN, MAZDA, MITSUBISHI, SUBARU and other automobile manufacturers in Japan have introduced related equipment for the production and development of parts. South Korea's HYUNDAI and KIA have also started to use hydroforming technology to produce related parts.
The application of pipe hydroformed parts in automobiles is shown in Figure 2. According to a survey by the Automotive Applications Committee of the American Iron and Steel Institute, the proportion of hollow light body parts in the total number of cars manufactured in North America has risen from 10% 15 years ago to 16%, and the proportion of medium-sized commercial vehicles, large jeeps and small trucks is even higher. It is estimated that by 2020, 50% of the structural parts of typical vehicles produced in North America will be manufactured using tube hydroforming technology.
Daimler Chrysler estimates that in 2020 the number of hydroformed components will increase by three times compared to 2012. Dana estimates that pipe hydroforming components will account for 50% of automotive chassis components in 2020, and for this reason, Dana will build at least 12 hydroforming machine production lines in California, Thailand, Brazil, Venezuela and Argentina in the next five years.
According to the latest report by Global Trade Consulting, the output value of automotive hydroformed components in the United States was 730 million US dollars in 2008, about 1.6 billion US dollars in 2012, and about 1.9 billion US dollars in 2016, and in the next 3 years (2017~2019), the average annual growth rate will reach 20%.
Fig.2 Application of hydroforming technology in automobiles
According to incomplete statistics, there are more than 50 independent auto brands in mainland China, and there are more than 8,000 auto parts factories. However, hydroforming technology is only used in some models of some car companies such as FAW, Great Wall and Changan, while most of the domestic automotive pipe parts still follow the traditional combination process of stamping and tailored welding, and the manufacturing process is complex, the efficiency is low, the cost is high, and the comprehensive quality and performance of the product are poor.
Automotive high-strength steel internal high pressure forming PPT
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