The automotive industry is increasingly demanding high-strength bolts

With regard to the status quo and future of China's automotive bolt companies, Chen Guangzu, a member of the China Automobile Industry Advisory Committee and a senior expert in the Chinese automotive industry, expressed his views. There is no absolute difficulty for Chinese companies to research and develop high-strength bolts. Chen Guangzu told reporters that in recent years, the automotive industry has increasingly demanded high-strength bolts and the difficulty of the production process has increased. However, this does not mean that domestic fastener companies do not have the ability to produce high-strength bolts. It is whether these companies have done so seriously.

Chen Guangzu said that the production of high-strength bolts, whether raw material supply or consistent production, is not the most advanced issue in the automotive industry. The relevant equipment and technical processes can be improved through various channels as soon as possible. One of the key reasons why domestic high-strength bolt products are difficult to achieve mass production is the lack of accumulated enterprise test data, and companies have not made enough efforts. In the bolt surface treatment process, for example, when the material of bolts is different from the material of the fixed parts, it is necessary to add coatings to the products to ensure sufficient friction and prevent corrosion of the bolts. This seemingly simple painting process requires the accumulation of enterprises. Numerous test data.

In addition, in the automotive bolt industry, we must not only pay attention to high strength, but also focus on high precision, such as the use of ultra-small bolts on engine nozzles. High-intensity and high-precision are the development direction of the automotive bolt industry.

Now, domestic fastener companies should timely adjust the product structure, change the mode of production, and learn from the production methods of the Japanese bolt industry. In Japan, a bolt company is likely to have only a few people. It is a production model entirely composed of machinery and handwork, and the business is relatively single, only doing certain kinds of bolts or a certain process responsible for the production of bolts. A number of such companies in tandem form a complete bolt making industry chain. This kind of enterprise is very professional and the product is always improving.

There are some enterprises in Zhejiang that are closer to Japan's production model. Chen Guangzu said that these enterprises follow the industrial chain's upstream and downstream relations and work in coordination, and each company is responsible for a link in production, such as cold heading, heat treatment, etc. Even product packaging has a dedicated company to operate, this way of collaborative work to the maximum The degree of specialization in the production of the product is ensured and the product quality is improved.