Core technologies for deep processing of titanium materials: bending, stamping, spinning and expansion
In the field of deep processing of titanium materials, a series of complex and sophisticated processing techniques are widely used to meet the needs of different industries for high-performance titanium alloy products. This article will deeply explore the four key processes in deep processing of titanium materials: bending forming, stamping forming, spin forming and expansion technology, and analyze the characteristics and application scenarios of each process in detail.
1.Bending and forming
Bending forming is a common plastic deformation process in deep processing of titanium materials. It bends titanium materials into the desired shape by combining plastic and elastic deformation. During the bending process, special attention needs to be paid to controlling the amount of springback to ensure the accuracy of the final molding. The bending angle of titanium materials is flexible and can be greater than 90°, but it must meet the minimum bending radius requirements. For titanium tubes with diameters less than 50mm, cold bending is a viable option, but subsequent stress relief annealing is recommended to optimize performance. Hot bending is divided into pull bending and push bending according to the force mode. The yield strength and plasticity of the material are reduced by heating, and the rebound angle is significantly reduced, making it suitable for more complex bending requirements.
2. Stamping molding
The stamping forming of titanium plates and titanium alloys is more difficult than other materials, mainly due to their large bending radius. In China, methods such as cold forming, hot forming, and preforming and post-heat straightening are usually used to deal with this problem. Cold forming is suitable for workpieces with thin walls, small deformation and low precision requirements; hot forming can achieve large deformation at lower or higher temperatures, and is especially suitable for the forming of thick slabs and large workpieces. Post-preforming hot shaping is a process that combines the advantages of cold and hot forming. It achieves the ideal shape and size through pre-stamping and subsequent heating and shaping.
3. Spin forming
Spin forming is an efficient forming method that combines the characteristics of multiple processes. It combines the advantages of forging, extrusion, stretching, bending and other processes. Spin forming not only has superior deformation conditions and high material utilization (can save 20%-50%), but also has high surface finish and high dimensional accuracy of the product. This process is particularly suitable for manufacturing titanium alloy products with complex shapes and high precision.
4.Expansion technology
Expansion jointing is a process that uses mechanical methods to tightly combine titanium tubes with titanium plates. It is widely used in the manufacturing of tube-type heat exchangers and other equipment. According to the different expansion joint methods, it can be divided into mechanical expansion joint, flexible expansion joint and explosive expansion joint. During the expansion process, the pipe and the tube sheet are tightly connected through deformation, and the degree of pipe expansion needs to be accurately controlled to ensure the firmness and sealing of the connection. Expansion joint technology not only tests the technical level of the craftsman, but also reflects a deep understanding of material characteristics and equipment performance.
To sum up, the bending forming, stamping forming, spinning forming and expansion joint technologies in titanium deep processing have their own characteristics, which together form a strong support for the manufacturing of titanium alloy products. With the continuous advancement of science and technology and the continuous innovation of processes, these technologies will continue to be optimized and improved, providing a more solid foundation for the wide application and performance improvement of titanium alloy products. If you want to know more information about titanium processing, please follow us.
