Pressure aluminum casting die for squirrel cage rotor of motor

Abstract

The invention relates to the technical field of die casting of motor rotors, and discloses a pressure aluminum casting die for a squirrel cage rotor of a motor. The pressure aluminum casting die comprises an upper die part, a lower die part and a rotor core part, and is characterized in that the upper die part is provided with an upper die, guide pillars and upper die base plates; a positioning ring, a positioning hole and an exhaust system are arranged on the upper die; the upper die and a machine tool slider are connected through the guide pillars, and are fixedly arranged through irregularly-shaped nuts; the upper die base plates and the machine tool slider are fastened through inner hexagon screws; the lower die part is provided with a middle die and a lower die; a positioning ring, a positioning hole and an exhaust system are arranged on the lower die; the middle die is fixedly arranged on the lower die through the positioning ring on the lower die; the rotor core part is provided with a dummy shaft, a taper key and a rotor core; the taper key is embedded into a dummy shaft groove; the dummy shaft is arranged in the positioning hole of the lower die; and the rotor core is sleeved in the dummy shaft through a taper key guide sleeve. The pressure aluminum casting die is rational in design, simple in structure and accurate in positioning, and can run stably, the shortcomings of air holes and looseness of a pressure aluminum cast rotor are remarkably improved, the manufacturing quality of the rotor is improved, the production cost is lowered, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of die-casting of a motor squirrel-cage rotor, in particular to a pressure-casting aluminum mold of a motor squirrel-cage rotor. Background technique [0002] At present, the domestic motor market has higher and higher requirements for motor efficiency, and the quality of cast aluminum rotors plays an important role in improving motor efficiency. The structure of the existing domestic three-phase asynchronous motor rotor casting aluminum mold adopts a fixed and closed upper mold design. This structure generally suffers from poor exhaust of the mold during pressure casting of aluminum, and it is also difficult to clean the exhaust system, resulting in rotor aluminum rings, There are serious defects such as air holes and loose cast aluminum in the guide bar, which increase the repair rate and scrap rate of the motor, reduce the efficiency of the motor, increase the temperature rise, and the current is large, s...

AI Technical Summary

Problems solved by technology

The structure of the existing domestic three-phase asynchronous motor rotor casting aluminum mold adopts a fixed and closed upper mold design. This structure generally suffers from poor exhaust of the mold during pressure casting of aluminum, and it is also difficult to clean the exhaust system, resulting in rot

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