Understanding Metal Stamping Process: Definition, Advantages, Characteristics & Materials

2022.3.5

The metal stamping process has become an important part of the manufacturing industry. Most stamping hardware parts are used in aerospace, automobile, shipbuilding, machinery, chemical industry, and other fields. So what is metal stamping and what are its advantages and applications.

What is Metal Stamping - Understanding Metal Stamping Process

Metal stamping is a process that uses punch and molds to deform or fracture iron, aluminum, copper, and other sheets and heterosexual materials to achieve a certain shape and size. Metal stamping is sometimes called sheet metal forming, but it is slightly different. The so-called plate forming refers to the use of plates, thin-walled tubes, and thin profiles as raw materials. The forming method of plastic processing is collectively referred to as plate forming. At this time, the deformation in the direction of the thick plate is generally not considered. The stamping industry involves a wide range of fields and goes deep into all aspects of the manufacturing industry. As for the metal stamping manufacturing process as a whole, the stamping process is mainly affected by three factors: equipment type, workpiece material, and lubricant performance. 

 

Advantages of metal stamping:

– Metal stamping parts are manufactured by stamping on the premise of low data consumption. Their parts have lightweight and have good stiffness. Moreover, after the sheet metal is plastically deformed, the internal arrangement structure of the metal is improved to improve the strength of the stamping parts.

– Metal stamping parts have high dimensional accuracy, uniform and common dimensions with modules, and have good interchangeability. The general device and application requirements can be satisfied without further machining.

– In the stamping process, because the appearance of the data is not damaged, it has good appearance quality and beautiful appearance lubrication, which provides convenient conditions for surface painting, electroplating, and other surface treatment.

 

Characteristics of metal stamping:

– High dimensional stability, lightweight and good stiffness

– Good surface quality and accuracy

– Easy operation with automation

– High productivity

– Mass production is available

– Low cost for high volume production

– Rely on equipment and mold

– Long production cycle and high initial investment

 

Applications of metal stamping:

– Automobile industry: such as wheel hub, gear, etc. are mainly deep drawing.

– Household industry: such as aluminum window, which is mainly formed by punching and shearing.

– Electrical industry: such as rice cooker, washing machine and other components.

– Daily use: make some handicrafts, such as tableware.

– Mobile phone industry: such as card slot, fixed frame, etc.

– Special stamping: such as stamping of aviation parts.

Material Selection of Different Metal Stamping Processes

There are three main stamping processes: blanking, bending, and stretching. Different processes have different requirements for plates. The selection of plates should also be considered according to the general shape of products and processing technology.

1. Blanking requires that the plate should have enough plasticity to ensure that the plate will not crack during blanking. The soft material has good blanking performance. After blanking, parts with smooth sections and small inclination can be obtained; The quality of hard materials after blanking is poor, and the section unevenness is large, especially for thick plates. For brittle materials, tearing is easy to occur after blanking, especially when the width is very small.

2. The plates to be bent shall have sufficient plasticity and a low yield limit. A sheet with high plasticity is not easy to crack when bending. The plate with a low yield limit and low elastic modulus has small rebound deformation after bending, and it is easy to obtain the bending shape with accurate size. The material with greater brittleness must have a larger relative bending radius when bending, otherwise, it is easy to crack in the bending process.

3. Sheet metal stretching, especially deep stretching, is a difficult kind of sheet metal processing technology. It not only requires the stretching depth to be as small as possible, the shape to be as simple and smooth as possible but also requires the material to have good plasticity. Otherwise, it is very easy to cause the overall distortion, local wrinkling, and even tensile cracking of the parts.

 

In addition, lubricates play a key role in the stamping process. Good cooling performance and extreme pressure and anti-wear performance have made a qualitative leap in the service life of die and the improvement of workpiece accuracy. According to different workpiece materials, the performance of stamping oil is also different.

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