Some people said electric motor production is very simple.
I want to say, if you want to make a good motor, it is not that simple.
1. Now we talk about Common annealing and quenching processes for motors:
In the production and manufacturing process of motors, in order to obtain some performance advantages of certain components, thermal treatment processes are sometimes used. Different materials, components, and performance requirements require different heat treatment methods. 1, The annealing process involves heating the components to 30 to 50 degrees above the critical temperature, holding them for a period of time, and then slowly cooling them to room temperature. The application of annealing treatment is to improve the internal structure and processing processability of materials; Increase the plasticity of materials and eliminate some processing stresses; For magnetic materials, it can be used to eliminate their internal stress, improve magnetic permeability, and reduce energy loss. The materials that can be processed by this process mainly include cast iron, cast steel, forged steel, copper and copper alloys, magnetic materials, high carbon steel, alloy steel, and stainless steel. The welding components of the motor (such as welding shafts, welding machine bases, welding end caps, etc.) and the bare copper bars of the rotor need to undergo necessary annealing processes.
2. The quenching treatment process involves heating the parts above the critical temperature point, holding them for a period of time, and then rapidly cooling them. The cooling medium chosen is water, salt water, cooling oil, etc., with the aim of achieving high hardness. Usually used to meet the performance requirements of parts that need to withstand high loads or wear resistance. Induction heating quenching is a method that utilizes the principle of electromagnetic induction to generate induced current on the surface of a workpiece. Through the skin effect of alternating current, the surface of the workpiece is rapidly heated to an austenitized state, and then rapidly cooled to transform the surface structure into martensite or bainite, thereby improving the surface hardness, wear resistance, and fatigue strength of the workpiece while maintaining high toughness in the central area. This method is commonly used for parts such as shafts and gears to improve their mechanical performance. 3, The critical temperature in heat treatment refers to the temperature at which the microstructure of a metal material changes, resulting in significant performance changes. The critical temperatures of different metal materials are also different. The critical temperature for heat treatment of carbon steel is around 740 ° C, and the critical temperature varies among different steel grades; The critical temperature of stainless steel is relatively low, generally below 950 ℃; The critical temperature for heat treatment of aluminum alloy is generally around 350 ℃; The critical temperature of copper alloy is relatively low, generally below 200 ℃.
