Head processing is essential in manufacturing various industrial components, and the choice of method depends on the material, shape, and production requirements. This article explores the most common techniques: cold stamping, cold spinning, hot stamping, hot spinning, and split processing.

Cold Stamping

Cold stamping is a pressure processing method where a stamping die is used on sheet material at room temperature. This process applies pressure to deform the material into the desired shape. It is known for producing heads with precise dimensions, excellent surface quality, and consistency. Since no heating is required, cold stamping is energy-efficient and has a lower environmental impact due to reduced exhaust emissions. This method is ideal for mass production, where dimensional accuracy and minimal material waste are essential.

Cold Spinning

Cold spinning, or sheet spinning, involves rotating a sheet at room temperature while applying pressure in specific directions to form the material into the desired shape. This process is especially useful for producing heads with non-standard diameters that traditional stamping cannot achieve. Cold spinning is cost-effective, as it reduces the need for expensive stamping dies. It combines strong spinning and ordinary spinning techniques to form various shapes, and for flat-bottomed heads, pre-formed pressure drum cold stamping is often used.

Hot Stamping

Hot stamping uses heated plates to improve material formability, making it suitable for producing high-strength or ultra-high-strength steel heads, especially for thicker materials. While the heating process makes it easier to shape the material, it also introduces environmental impacts due to the fuel used for heating. Additionally, the material's performance may become uneven during cooling, requiring subsequent heat treatment. Despite these challenges, hot stamping is ideal for thicker heads where material strength is a priority.

Hot Spinning

Hot spinning is a variation of cold spinning, where the material is heated to improve its flow properties during the forming process. It is suitable for producing thicker heads and non-standard diameters. Unlike hot stamping, hot spinning allows for better control of diameter changes and is often easier to manage when shaping thicker materials. Although not as commonly used, it provides advantages in specific applications where hot stamping may not be ideal.

Split Processing

Split processing involves splitting a larger sheet or tube into sections, which can then be formed into heads using either cold or heated methods. This technique is typically employed for producing large or complex components that cannot be handled by traditional stamping or spinning equipment. Although it requires more time for mold setup and has longer production cycles, split processing is useful for special or oversized products.

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