What's the difference between stamping and rolling process? What are their advantages and disadvantages? What is their scope of use?

Stamping process and rolling process are two different metal processing methods, and there are some differences in principle, application scope and process characteristics.

1. Principle: The stamping process is to use the die and impact force to punch the metal plate into the required shape, and use local plastic deformation to complete the processing. In the rolling process, the metal plate is deformed and pressed by a multi-roll mill to achieve the processing purpose.

2. Scope of application: Stamping process is more suitable for producing parts or products with large quantities and complex shapes, such as inner and outer panels of automobile bodies and housings of household appliances. Rolling process is usually used for the continuous production of metal plates, such as rolling of rolled plates, sheets and strips, and the manufacture of aluminum foil.

3. Process characteristics: The stamping process has the characteristics of high precision, high efficiency and good repeatability. By controlling the impact force, die design and process parameters, accurate shape and size requirements can be achieved. The rolling process has the characteristics of continuity, high capacity and relatively low cost. Rolling mills are generally composed of multiple rolling mills, which can realize a wide range of plate processing.

Stamping process:

Stamping is a process of stamping a metal plate into a desired shape by exerting a force on it. It uses stamping machinery and equipment to cut, bend or punch the metal plate into the required shape through the die. Stamping process is suitable for mass production of metal parts and can be processed quickly and efficiently.

1. Advantages:

Efficient production: stamping process is suitable for large-scale and high-speed production requirements, and can realize rapid continuous processing.

Accuracy: The stamping process can realize complex shape and accurate size control, and is suitable for occasions with high requirements on product quality and accuracy.

Economy: Stamping process is usually low in production cost, especially suitable for mass production, which can effectively improve production efficiency and reduce unit cost.

Multifunctional: stamping can not only perform basic operations such as cutting, punching and bending, but also realize complex processing such as multi-step stamping and special-shaped stamping.

2. Disadvantages:

Initial investment: the stamping process needs to make a special stamping die. For small-scale production, the development and manufacture of molds may have a high initial investment cost.

Limited scope of application: stamping process is usually suitable for dealing with thin plate materials, which has great restrictions on thicker metal plates.

Limited deformability: Stamping process has some limitations in plastic deformation of materials, and is not necessarily suitable for processing parts involving complex three-dimensional surfaces and nonlinear deformation.

Stamping technology is widely used in automobile, household appliances, electronic products, aerospace and other fields, and can manufacture various metal parts.

Rolling process:

Rolling is to change the shape of the metal plate by applying roll pressure to the surface of the metal plate to make it plastically deform under stress. It uses roller press equipment to realize the plastic processing of metal plate by adjusting roller spacing and roller shape. Rolling process is suitable for producing strip or continuous length metal products, such as metal wire and steel pipe.

1. Advantages:

Suitable for metal processing with high strength and hardness.

Metal products with specific cross-sectional shapes and sizes can be realized.

The finished product has good quality and smooth surface.

2. Disadvantages:

The requirements for raw materials are higher, and larger initial materials are needed.

The equipment is complicated and the cost is high.

Rolling technology is widely used to manufacture various metal products with continuous length.

Basic steps of stamping process:

1. Die design: according to the shape and size requirements of the required products, design and manufacture the appropriate stamping die. The die includes an upper die and a lower die, which transform the metal plate from the original shape to the required shape by impact force.

2. Material preparation: select a suitable metal plate as raw material and cut or cut it into a size suitable for stamping.

3. Feeding: put the metal plate on the punch and feed it into the mold through the feeding system.

4. Stamping operation: start the punching machine, apply impact force, and make the upper die and the lower die impact the metal plate, so that it will be plastically deformed, thus obtaining the required shape.

5. Cutting/punching: According to the needs of product design, cutting, punching and other operations can be carried out in the stamping process to achieve a specific shape and internal structure.

6. Removal of residual materials: After stamping, residual metal materials are removed from the finished product, usually by cleaning the mold or other residual removal devices.

7. Forming processing: further forming, bending, folding, welding and other processing operations are carried out on the stamped product as required to obtain the final product.

8. Inspection and quality control: Inspect the stamped products, including size, appearance and material properties, to ensure that the products meet the quality standards.

9. Cleaning and maintenance: clean the mold and punch in time and do a good job of maintenance to ensure the normal operation and service life of the equipment.

Basic steps of rolling process:

1. Preparation: Select suitable raw materials and clean the surface.

2. Feeding: feeding the metal plate into the feeding system of the roller press equipment, and driving the metal plate by the roller shaft.

3. Rolling process: the metal plate is pressed and adjusted by a series of rollers to form the required cross-sectional shape and size.

4. Roller adjustment: Adjust the distance between roller shafts and roller type as needed to ensure the correct plastic deformation of the metal plate.

5. Inspection and adjustment: check the rolled metal products, such as size and surface quality, and make necessary adjustments.

6. Cutting and finishing: according to product requirements, the rolled metal products are cut, trimmed or otherwise treated.

7. Finished product inspection: conduct a comprehensive inspection of the final product to ensure that it meets the quality requirements.