As a basic mechanical part, car fasteners are widely used in automotive interior and exterior trims, chassis, power systems and various body structures and systems, and play a fundamental and important role. Because it is closely connected with various parts of the body, it needs to adapt to various complex and harsh environments and occasions together with the body. The failure of fasteners often causes serious accidents or consequences. Therefore, the automotive fastener industry has strict requirements on product quality, stability and durability.
With the continuous advancement of national energy conservation and emission reduction policies, new energy vehicles have become an important direction for the future development of the automotive industry. Traditional carbon steel has the disadvantages of poor thermal hardness and high density, which makes it difficult to meet the development needs of new energy vehicles. Therefore, the application of various new materials, including various aluminum alloys and stainless steel, has gradually expanded in the auto fastener industry, which can meet various requirements for lightweight, structural design, processing, and harsh environments, and overcome the performance limitations of traditional materials of fasteners.
The traditional fastener R&D and production usually design a plan first, and then produce corresponding samples according to the design plan, and test whether the samples meet the design requirements. This method usually requires repeated modification of the plan and repeated production of samples, which has the disadvantages of low efficiency and high cost. The application of simulation technology, through modeling and the determination of appropriate boundary conditions, can more intuitively and accurately reflect the reaction of various products under different stress, processing and deformation conditions, and the selection of final molding and processing technology. The selection of materials has high reference value and significance.
The traditional fastener production process is mainly based on cold heading, which has a low production cost, but the forming ability of complex parts is weak. As a process with higher precision, machining can realize the production of high-precision and high-complexity products. However, since the machining process itself is the cutting and cutting of raw materials, the material utilization rate is low, the cost is high, and the machining process is relatively complex, resulting in relatively low production efficiency. Therefore, combining the characteristics of traditional cold heading and warm heading processes with the advantages of machining can realize the production of high-precision and high-complexity products at low cost and high efficiency, and meet the increasingly stringent requirements of vehicle manufacturers, such as cost and accuracy requirements. The improvement and combination of various processes have increasingly become the innovative direction of many automotive fastener manufacturers.
At present, the automotive industry is gradually developing towards light weight, diversification, intelligence and environmental protection, and the requirements for material application, design speed, production accuracy and environmental protection degree in the fastener industry are increasing. Therefore, the application of new materials, the application of simulation technology, and process innovation have gradually become a new direction for the development of the automotive fastener industry.