The casting process of micro motor casing is mainly based on advanced skills, which is conducive to improving the casting level of motor casing. In terms of design and practical skills, we should do a good job in the three processes of pre-processing, central processing and post-processing.
First, establish a solid model according to the shape of the actual object, and finish the preliminary work of the casting through numerical simulation, polyhedral unit subdivision and three-dimensional simulation calculation skills.
2. Numerical simulation method is used to analyze and judge the heat balance equation and shrinkage hole of the miniature motor housing to complete the central processing work.
3. Use colorful graphics or drawings to analyze the dynamic performance of the computer results. In the casting process of motor shell, attention should be paid to the casting position, bisector surface, riser, cold iron and other processes. The bottom pouring system can be selected, which is conducive to mold exhaust and scum floating.
Miniature motor housing should pay attention to the use of smelting process. The principle of selecting chemical raw materials is: avoid graphitization swelling lack of shrinkage, avoid graphite floating phenomenon; In the smelting process, according to the finite feed equilibrium condensation theory, in order to reduce the liquid shrinkage, low temperature casting method is used.
The smelting process and application of the micromotor casing should show its accuracy and applicability. The shell of the micro motor mostly uses double melting or electric furnace melting, and there are also some enterprises use clay sand high pressure molding, and the hot core or cold core skills of coated sand are generally used for core making.
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