Electric machine support manufacturing method

Abstract

The method includes following steps: (1) designing die; (2) carrying out die-casting by using die-casting technique; (3) cutting die-casting product; (4) cold pressing to obtain outline characters needed. When designing die, the method does following arrangements: prepares circular arc transition for corners of cross section in die cavity; width at corner larger than widths at two edges; inner arc radius larger than outer arc radius at corner. The invention uses die-casting technique to replace traditional press working for brackets in electrical motor industry for years. Advantages are: strengthening thickness and intensity of bracket at corner portion locally; not need of increasing thickness for bracket or other positions, or increasing thickness through welding; maximized mechanical strength under same quantity of materials. Thus, the invention saves materials, reduces manufacturing complexity, and lowers cost.

Description

technical field [0001] The invention relates to a method for manufacturing a bracket, in particular to a method for manufacturing a motor bracket. Background technique [0002] The motor industry plays a pivotal role in my country's industry, and its technological progress has greatly promoted my country's industry. Among them, the shaded pole motor is widely used in small power fans, fans, pumps, warm ovens and other household appliances due to its simple structure, convenient manufacture, low price and reliable operation. The structure of the shaded pole motor usually includes a front bracket and a rear bracket. However, in the current motor industry, the front bracket and the rear bracket are generally stamped from sheet metal. The thickness of this bracket is uniform and the corners are thin. Due to the characteristics of the stamping process itself, the stamped finished product is stretched and squeezed. effect, the mechanical properties will be unstable, and some part...

AI Technical Summary

Problems solved by technology

Among them, the shaded pole motor is widely used in small power fans, fans, pumps, warm ovens and other household appliances due to its simple structure, convenient manufacture, low price and reliable operation. The structure of the shaded pole motor usually includes a front bracket and a rear bracket. However, in the current motor industry, the front bracket and the rear bracket are generally stamped from sheet metal. The thickness of this bracket is uniform and the corners are thin. Due to the characteristics of the stamping process itself, the stamped finished product is stretched and squeezed. effect, the mechanical properties will be unstable, and some parts will be stretched so that the material structure is relatively loose and the mechanical strength will decrease, such as the outer arc surface of the corner, and the stress at the corner is often the most concentrated when the bracket is used, so the long-term vibration of the motor rotor rotation Under the circumstances, mechanical fatigue is prone to occur at the corner of the bracket, resulting in deformation of the bracket, affecting the stable operation of the motor, and increasing the working noise of the motor; at the same time, there are usually two methods to increase the strength of the corner of the bracket, one is to directly increase the stamped metal sheet The thickness of the corner of the bracket is increased to achieve the purpose of increasing the strength, but in this way, when other parts of the bracket do not need to be strengthened, it will cause waste of material and directly affect economic benefits; second, use welding to thicken The method to increase the strength of the corner, but because the processing of the corner is extremely inconvenient, and welding will increase the processing process, increase the cost, and affect the profit of the enterprise

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