Development and Application of CNC Spinning Process


The development of CNC spinning originated from manual spinning. Manual spinning was the earliest used in the lighting industry, metal tableware and other thin metal forming. Manual spinning is suitable for aluminum plate thickness less than 1.5mm, iron plate less than 1.0mm, stainless steel plate less than 0.8mm. When the thickness exceeds this range, it is impossible to spin the thick plate because artificial force cannot overcome the pulling force required for metal forming. NC spinning is based on manual spinning, which increases the control of the CNC system. The production is more stable and the dimensional accuracy is better than manual spinning.

The early CNC spinning machine was converted from a CNC lathe, and then the CNC system was used to simulate the manual knife path for metal forming. The early development of CNC spinning in the lighting and lampshade industry was rapid. Dongguan, Huizhou, Zhongshan, and Foshan were the most important manufacturing bases for lighting. The CNC spinning machine in the lighting industry was mainly a light spinning machine, and its machine bed was lighter. , The spindle speed is fast, the tool holder feed speed is fast, because the lamp industry in the lighting industry has a large production volume, the required spinning machine production efficiency is higher. On the other hand, the outer surface of the lighting lampshade needs to be painted, and the spinning pattern of the spinning parts produced should be smooth. The spinning pattern made by the early CNC spinning machine was thicker than the manual spinning pattern. Later, the thumb was developed. After the knife path, the spinning pattern was gradually improved. The current lighting industry is fiercely competitive, and now the lighting industry has gradually moved to Zhejiang, Jiangsu, and Fujian for manufacturing. However, the manufacturers of light CNC spinners are mainly located in Guangdong. The price of light spinners is very low. Many manufacturers sell them in combination with automated manipulators. The electronics and communications industry in Guangdong is relatively developed. The components of the signal transmission cover and shielding cover in the general communication industry require spinning processes to manufacture. In addition, the stainless steel fittings of the furniture industry are also widely used in the spinning industry.

CNC spinners are also widely used in the hardware tableware industry. In Jieyang and Shantou, Guangdong, the hardware tableware industry is very mature. NC spinning machine is mainly used for stainless steel tableware spinning with thickness less than 1.2mm. Hardware tableware and lighting and lampshades are mass-produced products, which mainly require spinning speed and smooth appearance. In the automotive industry, spinning is mainly used in exhaust pipes (three-way catalysts), mufflers, and air shock absorber shells. The metal materials of these products are mainly 6 series and 5 series aluminum and 409 stainless steel. Due to the thicker thickness of the metal parts used in the molding of auto parts, powerful spinning machines are required to form them. However, exhaust pipes and mufflers are mainly pipe parts, and pipe spinning machines are widely used. In the field of pipe spinning, the design of the fixture is extremely important. For example, if the clamping force of the fixture is too large, the pipe is easily deformed and the clamping force is too small, and the pipe is easy to move during the process of pipe rotation.

In Zhejiang and Jiangsu, powerful spinning machines are widely used in the head industry, and large-scale flanging machines are widely used in the fan industry. These two models have different structures from general spinning machines. Some small equipment's mechanical parts often require strong spinning parts, such as the stainless steel casing of blanking equipment and dust removal equipment, and the blanking funnel of injection molding machines all require strong spinning. Fan industry's tuyere collector products are relatively large in size, and often require large-scale powerful spinning machines above 800 to process. The stainless steel industry in Wuxi and Wenzhou is developed, and the spinning industry is mainly used in the strong spinning of stainless steel. In Cangzhou, Hebei, dust removal and environmental protection equipment are mainly used. The processing of Venturi tubes can be made by stamping and drawing processes, but CNC spinning is more advantageous in the manufacture of stainless steel Venturi tubes. Venturi valves and Venturi valves have similar functional principles. Venturi valves require large-scale pipe-spinning processes to make them.

In China, spinning is mainly concentrated in Jiangsu, Zhejiang, Shanghai, Shandong, and Guangdong. In addition to spinning for civilian products, there are many advantages in product application in the military industry. Spinning is mainly to save materials. Cold spinning can reduce the grain size of materials. To improve the strength and hardness of the product.