How does the stretching die ensure the high precision and surface finish of the inner and outer surfaces?
Publish Time: 2025-07-21
In modern industrial production, especially in the manufacturing process of high-precision parts such as nickel-metal hydride batteries, alkaline batteries and new energy lithium battery steel shells, the stretching die plays a vital role. It not only determines the shape and size of the final product, but also directly affects the precision and surface finish of the inner and outer surfaces. By adopting advanced design, high-quality raw materials, precision processing technology and professional surface treatment technology, the stretching die can ensure that the inner and outer surfaces meet high precision requirements and achieve excellent surface finish.First of all, the design of the stretching die is the key starting point to ensure the high precision of the inner and outer surfaces. The design stage needs to comprehensively consider the material properties, molding process and expected product performance. Professional engineers will use computer-aided design (CAD) software for three-dimensional modeling to accurately calculate every detail, including the geometry of the mold, dimensional tolerances and the smoothness of the transition area. Especially when designing complex surfaces, engineers will pay special attention to how to minimize stress concentration points to avoid cracks or deformation problems during subsequent use. This meticulous design process lays a solid foundation for subsequent processing.Secondly, the selection of high-quality raw materials is crucial to ensure the accuracy of internal and external surfaces. Carbide is often used to manufacture high-precision stretching dies due to its excellent wear resistance and high strength. This type of material can not only remain stable under high temperature and high pressure environments, but also effectively resist wear and corrosion, thereby ensuring that the mold can maintain high precision during long-term operation. In addition, according to specific application requirements, other special alloys or composite materials can be selected to further optimize mold performance. For example, in some scenarios where corrosion resistance is highly required, alloys with specific elements can be selected to enhance the corrosion resistance of the mold and thus improve the surface quality of the product.Furthermore, the use of mature processes and special processing equipment is an important means to achieve high-precision internal and external surfaces. In the actual manufacturing process, precision CNC machine tools (CNC) are widely used in mold processing. These devices have extremely high positioning accuracy and repeatability, and can automatically complete complex cutting operations according to pre-set programs. Compared with traditional manual operations, CNC machine tools can significantly reduce human errors and ensure that each processing step is strictly executed in accordance with the design drawings. At the same time, special tools and techniques are also required for the processing of internal and external surfaces. For example, using a ball-end milling cutter for surface finishing can achieve a smooth surface effect while ensuring accuracy; while EDM wire cutting technology is suitable for processing mold parts with complex contours, ensuring smooth transition and flatness of the edges.In addition to the design and processing links mentioned above, surface treatment technology is also an indispensable part of improving the accuracy and surface finish of internal and external surfaces. By applying various coating technologies, such as physical vapor deposition (PVD) and chemical vapor deposition (CVD), a hard and smooth protective film can be formed on the surface of the mold. This film not only increases the hardness of the mold surface and extends its service life, but also significantly reduces the friction coefficient and reduces the friction between the workpiece and the mold, thereby avoiding surface scratches or wear caused by friction. In addition, after fine grinding and polishing, the mold surface will be smoother and more delicate, which helps to improve the surface quality and consistency of the finished parts.It is worth noting that in order to further improve the accuracy of internal and external surfaces, manufacturers usually introduce strict quality control measures. From raw material procurement to finished product inspection, every link needs to be carefully inspected to ensure that there are no defects or deviations. For example, after processing is completed, high-precision measuring instruments are used to inspect the key parts of the mold to verify whether it meets the design standards. Only when all indicators meet the requirements will the mold be put into use. This series of rigorous quality management processes not only ensures the high quality of individual molds, but also provides strong support for the stable operation of the entire production line.Finally, customized solutions enable stretching die to better adapt to the specific needs of different customers. The application scenarios of each industry are different, so personalized mold design solutions are required for specific working conditions. For example, in the production of new energy battery steel shells, due to the diverse product specifications and extremely high dimensional accuracy requirements, manufacturers can adjust the mold structure, optimize processing parameters, and even develop new materials to meet challenges according to the actual needs of customers. This flexibility not only improves customer satisfaction, but also promotes technological innovation and development of the entire industry.In summary, stretching die can effectively ensure the high precision and surface finish of internal and external surfaces through careful design, selection of high-quality raw materials, advanced processing technology, and strict surface treatment technology. Whether facing complex and ever-changing market demands or increasingly stringent industry standards, stretching die always stands at the forefront of manufacturing with its excellent performance, helping companies achieve efficient production and high-quality product output. With the advancement of technology and changes in market demand, I believe that stretching die will play an important role in more fields in the future and continue to create new value.
