Forging process of radiator

The forging process is formed by heating the aluminum block to the falling point and filling the die with high pressure. Its advantage is that the fin height can reach more than 50 mm and the thickness is less than 1 mm. It can get large heat dissipation area in the same volume, and the forging is easy to get good dimensional accuracy and surface finish. But when forging, due to the necking phenomenon during the cooling plastic flow, the radiator is easy to have uneven thickness and height, which affects the heat dissipation efficiency. Because of the low plasticity of the metal, it is easy to crack during deformation, and the deformation resistance is large, which requires large tonnage (more than 500 tons) forging machinery. It is also because of the high cost of equipment and mold that the product cost is very high. And because of the high cost of equipment and mold, unless mass production, otherwise the cost is too high.
At present, there are not many manufacturers in the world who have the ability to produce cold forged heat sinks. The famous one is alpha of Japan, while Taiwan is Taisol, malico Taiye technology. The advantage of cold forging is that it can produce heat sink whose heat dissipation area is larger than that of aluminum extrusion. Because the aluminum extrusion process is stretching, the aluminum metal structure is horizontally expanded, while the cold Satin direction is vertically compressed. Therefore, cold forging has a great advantage in heat dissipation, but the disadvantage is high cost and few manufacturers have technology to manufacture.

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