Production equipment and process of copper-clad aluminum bimetal composite wire rod

Abstract

The invention relates to production equipment and process of a copper-clad aluminum bimetal composite wire rod, belonging to the technical field of metal material processing. The production equipment is composed of a heating element, a molten aluminum temperature control crucible, a core metal pouring stopper rod, a temperature measurement instrument, a pressure mechanism, an extrusion stem, a hollow hole forming pin, an extruding barrel, an extruding mold, a cooling device, a water tank, a tensioning mechanism and a winding machine. The production process comprises the following steps: a copper billet is placed in the extruding barrel and an aluminum ingot is placed in the temperature control crucible, heat is preserved after the heating element outside the extruding barrel is heated to be at the required temperature, the extrusion stem moves downwards under the action of the pressure mechanism to punch and extrude the copper billet in the extruding barrel to form a clad copper pipe; when the copper pipe is extruded out of a mold, the core metal molten aluminum pouring stopper rod is pulled, molten aluminum is sucked in the copper pipe under the action of the negative pressure in the pipe and solidified, is further cooled by the cooling device and the water tank, then passes through the tensioning mechanism, and finally is reeled and collected on the winding machine. The equipment is simple, the technological process is short, and both the equipment and the process are suitable for large-scale production; the prepared copper-clad aluminum wire rod has accurate boundary dimension, core metal has no casting defect, and the interface of outer layer metal copper and core metal aluminum is clean and free of pollution, and therefore, a good metallurgical bonding effect is achieved.

Description

Technical field: [0001] The invention provides a copper-clad aluminum bimetal composite wire production equipment and process, belonging to the technical field of metal material processing. Background technique: [0002] Copper clad aluminum bimetal composite wire (Copper clad aluminum, CCA) is a concentric coating of copper on the outer surface of the aluminum core wire, so that the two metals form a metallurgical bond between the atoms at the interface to form a whole metal wire, which is the premise of ensuring the performance Next, it has the advantages of two metals at the same time. Copper-clad aluminum bimetal composite wire has the characteristics of good conductivity, low density, soft texture, good corrosion resistance, easy brazing, and low price. It is a new substitute product for pure copper core cables. Especially in high-frequency transmission, due to the "skin effect", the current is concentrated on the surface layer of the conductor for transmission. The ap...

AI Technical Summary

Problems solved by technology

Since the outer copper tube in the liquid-solid phase composite method is a cast copper tube, it has some structural defects inherent in casting, such as looseness, shrinkage cavity or uneven shrinkage, which affect the quality of the copper-clad aluminum bimetallic composite wire. It is difficult to process bimetallic composite wire with complex shape

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