Common Classification of Stamping Process And Application

Introduction

Stamping process, as an important part of modern manufacturing, occupies a decisive position in the field of metal processing with its high efficiency, precision and significant cost-effectiveness. This process applies pressure to metal sheets through dies and stamping equipment to cause them to undergo plastic deformation or separation, thereby quickly forming parts of the required shape and size. This article aims to deeply explore the different classifications of stamping processes and their wide application in actual production, in order to provide valuable reference for manufacturing practitioners.

What is stamping process

Stamping process, in short, is a metal processing method that uses dies to plastically deform or separate metal sheets on a press. It combines die design, material science, mechanical principles and automated control technology to achieve efficient and mass production of parts.

The core of the stamping process lies in the interaction between the die and the sheet. During the stamping process, the upper and lower dies (punch and die) of the die are closed under the drive of the press, exerting huge pressure on the metal sheet placed between them. This pressure causes the sheet to deform plastically, forming the required parts according to the shape of the mold; or the sheet breaks and separates at a specific position to complete operations such as punching and blanking.

Classification by finished product

Separation process: A process designed to separate metal sheets into independent parts or remove excess material.

·Blanking: Punching the sheet into parts of the required shape and size through a die, while removing waste. Commonly used to manufacture metal sheet parts of various shapes.

·Punching: Punching holes in round, square or other shapes on the sheet to meet the design requirements of the parts. And widely used in the automobile industry, home appliances, electronics and other industries.

·Trimming: Removing excess material from the edge of the part to improve the accuracy and appearance quality of the part. Commonly used in precision parts processing.

Forming process: Plastic deformation of the sheet through a mold to form parts of complex shapes.

·Bending: Bend the sheet along a straight line or curve into a certain angle or shape, such as U-shaped, V-shaped, etc. Widely used in the manufacture of structural parts such as automobile bodies and frames.

·Drawing: Pulling a flat material into the mold cavity to form a hollow part, such as a cup, cylinder, etc. It is commonly used in the production of containers, shells and other products.

·Precision stamping: A high-precision stamping process that achieves high-precision, burr-free processing of parts through special molds and process control. It is widely used in precision instruments, electronic components and other fields.

Classification by temperature

Cold stamping: A stamping process performed at room temperature, which has the advantages of high production efficiency, long mold life and low cost. It is suitable for most metal materials, especially low carbon steel, stainless steel, etc. However, for high-strength and high-hardness materials, cold stamping may cause material cracking or mold damage.

Hot stamping: A stamping process performed after the material is heated to a certain temperature. The yield strength and hardness of the material are reduced by heating, and the plasticity is improved, which makes it easier to form complex shapes or process high-strength materials. Hot stamping is widely used in the processing of high-strength steel, aluminum alloy and other materials in the fields of automobile bodies, aerospace, etc.

Classification by mold structure

Simple stamping: Using a single-process mold, each stamping can only complete one operation (such as blanking or punching). Suitable for the production of parts with small batches and simple shapes.

Continuous stamping: Using multi-station dies, multiple processes (such as blanking, punching, bending, etc.) are completed continuously in one stamping stroke. It greatly improves production efficiency and is suitable for mass production of parts with complex shapes.

Compound stamping: At the same station, multiple processes are completed in one stamping by combining multiple die actions. Compared with continuous stamping, compound stamping reduces the number of dies and stamping strokes, further improving production efficiency.

Classification by basic process

This part has been elaborated in detail in the previous article in combination with separation and forming processes, and will not be repeated here. However, it is worth noting that each basic process has its own unique process requirements and application scenarios. Reasonable selection and optimization of process combinations are crucial to improving product quality and production efficiency.

Special processes

Precision stamping: As an advanced form of forming process, the precision stamping process achieves high-precision and burr-free processing of parts by precisely controlling die clearance, pressure distribution and lubrication conditions. It has a wide range of applications, including precision instruments, electronic components, medical devices, etc.

Local forming: For the special shape requirements of local areas of parts, local forming processes are used for processing. This process is usually combined with other stamping processes to achieve the overall forming of parts. Local forming is of great significance in the production of parts with complex shapes.

Conclusion

There are various classifications of stamping processes, and each classification method reveals its technical characteristics and application scope from different angles. Choosing a suitable stamping process plays a key role in improving product quality, reducing production costs, and improving production efficiency. With the continuous development of the manufacturing industry, the stamping process is also constantly innovating and improving. For example, the application of automation and intelligent technology will further promote the development of stamping technology in a more efficient, more precise and more environmentally friendly direction. In the future, stamping technology will continue to play an important role in the manufacturing industry and provide high-quality metal parts and components for all walks of life.