Motor copper rotor die casting device and die casting method

Abstract

The invention discloses a motor copper rotor die casting device and a die casting method, and belongs to the technical field of non-ferrous metal smelting and rolling processing. The motor copper rotor die casting device comprises a low-frequency induction furnace and a die casting machine. The heating power of the low-frequency induction furnace is 0-50 KW, the die casting machine comprises a front die assembly, a middle mold assembly, a rear mold assembly and a pressing mold assembly; and the front mold assembly, the middle mold assembly, the rear mold assembly and the injection mold assembly are sequentially arranged and spliced and combined. According to the motor copper rotor die casting device and the die casting method, a middle mold frame and a rear mold frame are fixedly connectedthrough screw thread connection, the middle mold frame and the rear mold frame are connected through limiting rods, limiting holes, square columns and bolt holes, and the mold frames are convenient to detach; and meanwhile, the produced castings are free of cracks, the filling rate is excellent, the adverse defects such as sticky mold are avoided, and a motor of a pure copper rotor of the die casting can reach the ultrahigh energy efficiency grade of IE 4.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal smelting and calendering, and in particular relates to a die-casting device and a die-casting method for a copper rotor of a motor. Background technique [0002] The cast copper rotor is a new type of motor rotor with copper as the conductive matrix. In the prior art, aluminum is generally used as the conductive matrix, but the conductivity of aluminum is only 60.7% of copper, and the resistivity is about 1.6 times that of copper. By using cast copper rotors instead of cast aluminum rotors, the total loss of the motor can be significantly reduced, thereby improving the overall efficiency of the motor. Although cast copper rotors have many advantages, due to the difficulty of producing cast copper rotors, cast aluminum rotors are still widely used in electric motors. [0003] The invention patent with the patent number of 200710066135.8 discloses a die-casting method and die-casting devic...

AI Technical Summary

Problems solved by technology

Using this technical solution, although it can effectively prevent the oxidation of pure copper and copper alloys during the smelting process, and the mold is easy to disassemble and replace, it has its disadvantages: 1. When the copper rod is loaded into the furnace for smelting, the intermediate frequency furnace needs to be heated first Raise to 20KW, and then upgrade to 40KW smelting after the copper rod turns red. The copper rod needs to be preheated. The whole process consumes time and energy, which increases the production cost of the enterprise; 2. The impurities in the copper melt cannot be cleaned in time Go out and die-cast the copper melt, the impurities in it will cause cracks at the end of the copper rotor, and the filling rate of the copper rotor is low, and the motor will generate noise during operation; 3. The mold preheating temperature is too high, Great damage to the mold, energy consumption, and in the subsequent demoulding process of the copper rotor, the copper melt is easy to stick to the mold, making demoulding difficult and damaging the copper rotor

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