red punch-forging-Forging Process,Introduction to the red punch（forging） process

"Red punch" is actually a hot extrusion process, because in the manufacturing industry around the coast of Zhejiang, China, especially in the pipe hardware production industry, if someone says "hot extrusion", not many people can immediately pay attention to its meaning, if the word "red punch" two words, then the insiders will know what kind of process it is? What kind of die? What kind of products are produced? In addition, the name "red punch" and the actual processing of the relationship is closer than other names called for the sake of loud, so it is easy to accept.

Red punching process

　　The term "red punch" is a new term, and it is difficult to find the origin of the term in the dictionary. Because the red punch process is just from the recent development of fine forging and hot extrusion based on an advanced professional process. With the advancement of society and the development of science and technology, the machinery industry has put forward new mechanical strength requirements for mechanical parts. Improve mechanical strength, generally using two methods, one is to change the material of the parts, the second is to change its processing method. Red stamping process is one of the effective methods to improve the mechanical properties of parts by changing the processing method, so its forging process, like a strong vitality and good prospects for development. Red stamping process like fine forging processing of metal billet heated and placed in the mold forming, but red stamping except for large red stamping parts are generally one-time forming, while fine forging is generally several pressure forming. Red stamping process compared with hot extrusion, metal billets also need to be heated, hot extrusion dies and cold extrusion dies are basically the same, the flow of metal materials in the die cavity is simpler, the shape of the formed parts, most of them are similar to cold extrusion parts, in favor of more simple shape parts forming, while the structure of red stamping dies than hot extrusion dies to complex, structural characteristics of the stamping method and cavity die forming method Organic combination, it can not only in the press extrusion molding cavity extrusion die, and can be implemented in a multi-directional release action, it is strong enough pressure, forcing the metal material in the cavity through the complex flow, extrusion like a cavity die (injection mold) as the shape of complex parts. Therefore, the red stamping process is a deeper and broader development of the fine forging and hot extrusion process.

The advantages of the red stamping process

　　1)Forming is basically not limited by the external shape of the product parts themselves

　　2) Production using common equipment, easy to put into operation, suitable for small and medium-sized enterprises production

　　3) High productivity, suitable for mass production

　　4)Due to the use of core extraction device, the pressed parts are hollow inside, not as solid as the forging die, and the general thickness of the small red punching die is about 0.5mm, while the thickness of the forging die is generally more than 2mm, so the material utilization rate is much higher than the forging die

　　5)Red stamping is a kind of processing process with less cutting, the surface roughness is close to the die, the dimensional accuracy can reach 6-7 grade, so its mechanical cutting amount is very small

　　6)The mechanical properties of red stamping parts are good, because after red stamping metal billet after heating, extrusion, cooling, its metal structure changes, eliminating the original defects caused by casting or drawing, so that the internal crystal structure of the parts is a line from the inside out, improving the mechanical properties of red stamping parts

　　7) After red stamping, the internal grain of the metal is refined, which enhances the density of the metal and improves the corrosion resistance of the parts.

　　8) Applicable to all kinds of non-ferrous or ferrous metal processing.

　　Because of the red stamping process to invest less capital, high production efficiency, excellent quality of the parts, and suitable for mass production, so produce a good economic effect. For example, the red stamping process in the production of daily-use hardware industry, has been widely used, such as with copper red stamping of pipeline hardware in a variety of valves, pipe fittings, nuts, etc., with its unparalleled quality advantages, has replaced the past has been produced by die-casting or casting products. Red punch, generally used in the manufacturing industry in Zhejiang, especially in the production of pipe hardware industry in a wide range of terms.