Method for forming bimetallic copper-aluminum composite pipe
Copper pipes are the main components used in refrigerators and air conditioners. The bimetallic copper-aluminum composite pipe tube is a bimetal composite pipe formed by metallurgical bonding with an inner layer of copper or a copper alloy and an outer layer of aluminum or aluminum alloy. It combines the characteristics of copper and aluminum two metals, heat conduction, electrical conductivity, compatibility with water, weather resistance, durability, oxidation resistance, corrosion resistance, high strength, sterilization and environmental protection features, small specific gravity, low price, can replace expensive The pure copper tube is widely used as air conditioner, refrigerator evaporator and cold suspect, refrigerator connecting tube, fan coil, solar hot water pipe, heating pipe, copper pipe and so on. Take air conditioning as an example.
has developed a method for forming a copper clad aluminum tube pipe. The method combines the swimming core technology with the continuous extrusion technology, and realizes the copper in the single-wheel double-slot continuous extrusion coating machine by using the swimming core. The tube is continuously coated with a certain thickness of aluminum or aluminum alloy. On the one hand, the swimming core supports the copper tube and ensures the strength of the core material, so that the shape can be smoothly formed. On the other hand, the core head can freely swim during the overmolding process to achieve the inner hole size and the inner surface high precision requirement. The metallurgical combined copper-aluminum composite pipe tube achieves the combination of continuous extrusion and swimming core technology. The outer diameter of the copper clad aluminum tube pipe is determined by the size of the inner hole of the female mold. The method can realize metallurgical compounding of copper-aluminum bimetal, simple process, energy saving and continuous production, and can effectively reduce the cost of heat exchangers for refrigerators and air conditioners, and has good application prospects.
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