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Future development trend and judgment of metal stamping processing industry

Future development trend and judgment of metal stamping processing industry

Metal stamping is a method of forming a work-piece (metal stamping part) of a desired shape and size by applying an external force to a plate, a strip, a pipe, a profile, and the like by a punching machine and a stamping die to cause metal plastic deformation or separation. Metal stamping and forging are the same metal plastic processing (or pressure processing), collectively called forging. Metal stamping blanks are mainly hot and cold rolled steel sheets and strips.

Among the world's steel, 60 to 70% are sheets, most of which are finished by metal stamping. The body, chassis, fuel tank, radiator piece of the automobile, the steam drum of the boiler, the casing of the container, the iron core silicon steel of the electric motor and the electric appliance are all metal stamping processing. In instrumentation, household appliances, bicycles, office machinery, living utensils and other products, there are also a large number of metal stamping parts.

Compared with castings and forgings, metal stamping parts are thin, uniform, light and strong. Metal stamping can produce work-pieces with ribs, ribs, undulations or flanging that are difficult to manufacture by other methods to increase their rigidity. Due to the use of precision stamping dies, the precision of the work-piece can reach micron level, and the repeating precision is high and the specifications are the same. Metal holes can be punched out, and the bosses and the bosses can be punched out.

Cold metal stamping parts are generally no longer machined or require only a small amount of machining. The accuracy and surface condition of hot metal stamping parts are lower than that of cold metal stamping parts, but still better than castings and forgings, and the amount of cutting processing is small.

Metal stamping is an efficient production method. It adopts composite stamping dies, especially multi-station progressive stamping dies. It can complete multiple metal stamping processes on one punching machine, which can realize unwinding, leveling and punching of strips to forming and finishing. Fully automatic production. High production efficiency, good working conditions, low production costs, and generally can produce hundreds of pieces per minute.

Types of metal stamping processes:

Metal stamping processing is mainly classified according to the process and can be divided into two categories: separation process and forming process. The separation process is also called punching, and its purpose is to separate the metal stamping parts from the sheet along a certain contour line, and at the same time ensure the quality requirements of the separated sections. The purpose of the forming process is to plastically deform the sheet without breaking the blank to produce a work-piece of the desired shape and size. In actual production, it is often the case that multiple processes are integrated into one work-piece. Blanking, bending, shearing, drawing, bulging, spinning, and correction are several major metal stamping processes.

The surface and intrinsic properties of metal stamping sheets have a great influence on the quality of metal stamping products. The thickness of metal stamping materials is required to be precise and uniform; the surface is smooth, no spots, no flaws, no scratches, no surface cracks, etc.; uniform yield strength , no obvious directionality; high uniform elongation; low yield ratio; low work hardenability.

In actual production, the technical test similar to the metal stamping process, such as the drawing performance test and the bulging performance test, is used to ensure the finished product quality and high pass rate.

The precision and structure of the metal stamping die directly affect the forming and precision of the metal stamping parts. The manufacturing cost and life of stamping die are important factors affecting the cost and quality of metal stamping parts. The design and manufacture of stamping dies requires more time, which extends the production lead time for new metal stamping parts.

Standardization of die holders, formwork and guides and development of simple stamping dies (for small batch production), composite dies, multi-station progressive dies (for mass production), and development of rapid die change devices to reduce metal stamping production preparation The workload and shortened preparation time can be applied to reduce the workload of metal stamping production preparation and shorten the preparation time, so that the advanced metal stamping technology suitable for mass production can be reasonably applied to small batch and multi-variety production.

In addition to the formation of thick plate hydraulic presses, metal stamping equipment generally uses mechanical punching machines. Centered on modern high-speed multi-station mechanical punching machines, it is equipped with unwinding, leveling, finished product collection, conveying and other machinery as well as stamping die library and rapid die change device, and can be controlled by computer program to form a high-productivity automatic metal stamping production line.

In the case of producing dozens or hundreds of metal stamping parts per minute, the processes of feeding, metal stamping, discharging, and discharging waste are completed in a short time, and personal, equipment and quality accidents often occur. Therefore, safe production in metal stamping is a very important issue.

Development of the resistance metal stamping forming industry to seek breakthroughs:

According to statistics, in 2003, China produced about 2.4 million tons/800 million pieces of automotive metal stamping parts, about 280,000 tons/1.9 billion pieces of motorcycle metal stamping parts, and about 960,000 tons/710 million pieces of metal stamping parts for tractors and agricultural vehicles. Household air conditioning and refrigerator metal stamping parts 1 million tons / 1.28 billion pieces. Industry experts predict that with the rapid development of the automotive industry in the largest user market in the metal stamping and forming industry, the Chinese metal stamping industry has ushered in a period of rapid development opportunities, but can seize the opportunity to achieve new and faster development, Experts pointed out that there are still many obstacles and obstacles to overcome and break through on the road ahead.

Resistance 1: Mechanization, low degree of automation

70% of the 680 metal stamping lines in the United States are multi-station punching machines, and 32% of the 250 production lines in Japan are multi-station punching machines. This kind of large-scale multi-station punching machine representing the current international level is not used in China. More; SME equipment is generally backward, high energy consumption and high environmental pollution; head forming equipment is simple, manual operation is more important; fine punching machine is expensive, 5 to 10 times that of ordinary punching machine, most enterprises are unable to invest hinder The promotion and application of fine punching technology in China; hydroforming, especially internal high pressure forming, large equipment investment, it is difficult to start in China.

Breakthrough point: accelerate technological transformation

It is necessary to change most of the current backward situation of manual loading and unloading, and adopt new techniques to improve the degree of mechanization and automation in light of specific situations. The automobile body cover metal stamping should be developed to the single machine connection automation and robot metal stamping production line, especially the large multi-station punching machine. We will strive to increase investment and accelerate the technological transformation of the metal stamping production line so as to reach the current international level as soon as possible. With the development of microelectronics technology and communication technology, the materialization and flexibility of sheet metal forming equipment has a technical basis. Accelerate the development of digital flexible forming technology, hydroforming technology, high-precision composite forming technology, and profile bending forming technology and related equipment for a new generation of lightweight body structures. At the same time, the old domestic equipment will be transformed to make it play a new production capacity.

Resistance 2: low production concentration

Many automobile groups are large and complete, forming a closed internal package, which leads to various types of metal stamping parts of various enterprises, low production concentration, small scale, easy to cause low-level redundant construction, difficult to meet specialized division of labor production, and weak market competitiveness; The motorcycle metal stamping industry is facing fierce market competition and is in a state of “excellent and inferior, not inferior”; the head manufacturing enterprises are small and scattered, with a concentration of only 39.2%.

Breakthrough point: take the road of specialization

Quickly change the current "big and complete" and "disparate" pattern, separate the metal stamping parts from the automobile group as soon as possible, and set up several large-scale metal stamping parts according to the large, medium and small parts of metal stamping parts. Manufacturing supply centers and dozens of small and specialized parts factories. Through the road of specialization, we can make metal stamping parts bigger and stronger, and become a supplier of metal stamping parts with competitive strength in the world.

Resistance 3: The self-sufficiency rate of metal stamping plates is insufficient, and the specifications are not matched.

At present, China's automotive thin plates can only meet about 60%, while high-grade car steel plates, such as high-strength plates, alloyed galvanized sheets, and ultra-wide plates (1650mm or more), are all imported.

Breakthrough point: materials should be coordinated with the industry

The varieties of automotive steel sheets should be more reasonable, and they should be developed in the direction of high-strength, high-corrosion and various specifications of steel sheets, and improve the metal stamping performance. Aluminum and magnesium alloys have become rational materials for lightweight vehicles, and the application of expanding them is already in the works.

Resistance 4: slower transformation of scientific and technological achievements, advanced technology promotion

In China, many new metal stamping technologies are not too late to start, and some have reached the international advanced level, but it is often difficult to form productivity. There are not many applications of advanced metal stamping technology, and some are only in the trial stage, and the absorption, conversion and promotion are slow. The investment in technology development costs is small, which leads to the slow application of advanced technology and the lack of development and innovation capabilities. The gap between SMEs in this area is even worse. At present, most of the domestic enterprises still use traditional metal stamping technology, which lacks research and technical reserves for the forming technology required for the next generation of lightweight automobile structures and materials.

Breakthrough point: the road of joint production, learning and research

Compared with Europe, the United States, and Japan, the biggest gap between China and China is that there is still no combination of production, study, and research. It is difficult to make scientific research, and the results cannot be transformed into productivity as soon as possible. Therefore, it should focus on large-scale development and industrialization projects, with universities and scientific research units as technical support, enterprises as application bases, and enterprise joint entities that form products, equipment, materials and technologies to form benign products that can not only develop and innovate but also rapidly industrialize. cycle.

Resistance 5: Large and fine stamping dies are imported

At present, the materials, design and production of metal stamping stamping dies can not meet the needs of domestic automobile development, and the degree of standardization is still low, about 40%~45%, while the international average is about 70%.

Breakthrough point: Improve the level of informationization and standardization

It is necessary to transform stamping die enterprises with information technology. The development focus is to promote CAD/CAM/CAE integration technology, especially the computer simulation analysis and optimization technology (CAE) of the forming process. Accelerate the standardization process of stamping dies in China, improve accuracy and interchange rate. Strive to achieve a coverage rate of 60% for stamping die standard parts in 2005, and more than 70% in 2010 to meet market demand.

Resistance 6: Lack of professional talent

High-quality talents with advanced design analysis technology and digital technology in the industry are far from meeting the needs of the rapid development of the metal stamping industry. In particular, the professionals in the motorcycle industry who have the knowledge and skills of metal stamping and technology are more lacking and outflowing. In addition, many joint venture companies are engaged in engineering design by foreign parties, mastering design rights and investment rights, and it is difficult for our metal stamping technicians to truly grasp the true meaning of the metal stamping process.

Breakthrough point: improve the quality of industry personnel

This is an urgent task and a long-term and systematic task. The revitalization of China's metal stamping processing industry requires a large number of high-level scientific and technological talents, a large number of entrepreneurs who are familiar with domestic and foreign markets, have modern management knowledge and capabilities, and a large number of advanced skilled personnel with advanced technology and technology. We must be willing to make great efforts and cultivate in a planned and hierarchical manner.

Metal Stamping Dies | Metal Processing | Metal Stamping Parts | Sheet Metal Parts-Dongguan Changdong Tool & Die Co., LTD

Changdong is one Professional Stamping Die maker in China. We also provide metal stamping parts, sheet metal parts, stamping processing,mechanical processing and checking fixtures.


The rapid development of the metal stamping and forming user market has brought new development opportunities to the metal stamping industry. Although there are various obstacles and obstacles in the development of the metal stamping industry, we always believe that these can't stop it. The pace of advancement in the metal stamping industry.


Shenzhen Changdong Stamping Dies CO., LTD. © copyright Add:NO. 56-B, Fuming South Road, Dalang, Dongguan, P.R.C 

E-mail:sales@chang-dong.com Tel:0086-769-8106 1256 0086-181-1876-8847 Sales Manager: Ms. Alice Fax:0086-769-8106 1926

Changdong is one of professional metal stamping die maker in China more than 10 years. We provide metal stamping dies to the customers in 16 countryies.
The company makes the progressive dies and transfer dies. As a stamping die manufacturer, also we provide the prototype dies and metal prototype parts for the short-run production.

Our main products: Stamping Die | Drawn Die | Metal Stampings | Checking Fixture | Progressive Die | Transfer Die | Metal Prototypes | Metal Stamping Tools| Prototype Parts | Prototype Die

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