What are the categories of separation processes in stamping processing?

Stamping processing relies heavily on presses and dies to plastically deform metal materials through pressure to obtain the desired part shape and size. The separation process is one of the key aspects in stamping processing, which involves separating the metal material from the original sheet to form a separate part. According to the separation method and process characteristics, the separation process in stamping processing can be divided into the following categories:

1. Shear separation: This is the most common type of separation, in which shear force is utilized to cut the metal material along a predetermined shear line. In the shear separation process, a punch and a die are usually used, where the punch provides the power and the die defines the shape and size of the shear. Shear separation is suitable for cutting straight lines or simple curves, such as the cutting of strips, trimming of edges, etc.

2. Perforation Separation: Perforation separation is achieved by applying a localized high pressure on a metallic material, which causes plastic deformation and eventual fracture at the point of stress, thus separating the material. Perforated separation can be further subdivided into two forms: punching and notching. Punching refers to the complete penetration of the material to form a hole, while notching refers to the formation of a gap of a certain depth only on the surface of the material.

3. Bending Separation: Bending separation utilizes the plastic properties of the metal material to achieve separation by bending the material to a certain angle under the action of a force. This type of separation is commonly used in bending operations, such as making metal frames or pipe connections.

4. Tensile separation: In the process of tensile separation, the metal material under the action of tensile force in a specific direction of plastic flow, so that the material is locally thinned or even fracture, so as to realize the separation of raw materials and raw materials. This method is commonly used in the manufacture of parts with complex curved surfaces, such as automobile body parts.

5. Composite separation: in actual production, it is often necessary to combine a variety of separation methods to complete the processing of a part. For example, the first shear separation to determine the basic shape, and then through the piercing separation to add holes, and finally through the bending separation to form the final spatial structure. This process of combining multiple separation techniques is called composite separation.

6. Laser cutting separation: Although strictly speaking does not belong to the category of traditional stamping processing, but laser cutting in modern manufacturing is also widely used as a way of separation process. Laser cutting uses a high energy density laser beam to irradiate the surface of the material, causing the material to rapidly heat up to a molten or vaporized state, while auxiliary gases blow the molten material away, thus achieving precise cutting.

Each separation process has its specific application scenarios and process requirements, and choosing the right separation method is of great significance to ensure product quality and improve production efficiency. When designing and implementing stamping processes, engineers need to select the most suitable separation process based on a combination of factors such as the structure of the part, material properties and production efficiency.