What is Cold Forging Technology?
Cold forging, also called cold volume forming, is a manufacturing process and a processing method. It is basically the same as the cold stamping process. The cold forging process is also composed of three elements: material, die and equipment. But the material in the stamping process is mainly plate, while the material in the cold forging process is mainly disc or wire.
It is called cold forging (cold forging for short) in Japan, cold forging in China, and some screw factories like to call it heading.
The rapid development of the current automobile industry, motorcycle industry and machine tool industry provides the driving force for the development of the traditional technology of cold forging. For example, my country's total national output of motorcycles in 1999 was more than 11.26 million. According to a preliminary estimate in 2000, my country's total demand for automobiles will reach 3.3 million by 2005, of which 1.3 to 1.4 million sedans. The demand for forgings in the automotive industry is above 500,000 to 600,000 tons. Although the start of cold forging technology in my country is not too late, the development speed is far behind that of developed countries. So far, the weight of cold forgings on cars produced in my country is less than 20kg, which is half that of developed countries. With great potential, strengthening the development and promotion of cold forging technology is an urgent task for our country.
Cold precision forging is a (near) net forming process. The parts formed by this method have high strength and precision and good surface quality. At present, the total amount of cold forging parts used in an ordinary car abroad is 40~45kg, of which the total amount of tooth-shaped parts is more than 10kg. The weight of a cold-forged gear can reach more than 1kg, and the tooth profile accuracy can reach level 7.
Technological development
The development of cold forging technology is mainly to develop high value-added products and reduce production costs. At the same time, it is constantly infiltrating or replacing it in cutting, powder metallurgy, casting, hot forging, sheet metal forming technology and other fields. The combination of processes constitutes a composite process. Hot forging-cold forging composite plastic forming technology is a new precision metal forming process that combines hot forging and cold forging. It makes full use of the respective advantages of hot forging and cold forging: good metal plasticity and flow stress in hot state Therefore, the main deformation process is completed by hot forging; the precision of cold forging parts is high, so the important dimensions of parts are finally formed by cold forging process. The hot forging-cold forging composite plastic forming technology appeared in the 1980s and has been more and more widely used since the 1990s. Parts manufactured with this technology have achieved good results in improving accuracy and reducing costs.
Advantages of cold forging process
The cold forging process is a precision plastic forming technology that has unparalleled advantages in cutting processing, such as good mechanical properties, high productivity and high material utilization. It is especially suitable for mass production and can be used as a manufacturing method for final products. (Net-shape Forming), has a wide range of applications in transportation, aerospace and machine tool industries.
Process disadvantages
High material requirements; not suitable for small-scale processing; high mold requirements.
As a cold heading dies manufacturer in China, Our has exported cold heading dies to many country in the past 20 years. If any inquiries, just feel free to contact us.
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