Analysis of complex external mold casting technology of motor shell

The complex shape and hollow water cavity of the motor shell make the casting of the product more difficult. EPC has a great advantage in the face of complex external mold castings, but this casting process can not get the water cavity of the motor shell; sand casting has low cost and can easily get the hollow water cavity, but it is difficult to get the external mold of the shell through a simple mold. If the two casting processes can be combined organically, the advantages of the two processes can be exerted to achieve the purpose of mass production of motor shell parts. At present, there are few researches on the combination of the two casting methods in China, and the combination of the two casting methods lacks systematic theory and experience. For this kind of production process, CAE analysis is used properly to determine the reasonable plan, avoiding the repeated tests due to the lack of theoretical support, which can play a good role in guiding the combined casting process.

With the increasing competition in modern machinery industry, how to enhance the competitiveness of enterprises and how to innovate become more and more important. The speed of putting new products on the market is constantly shortened, which requires the continuous evolution of the whole product development process.

It can be seen that the three-dimensional modeling of products should be consistent with the finished products after processing. The first step is to determine the casting process. In casting production, a good process can meet the use requirements of the product designer to the greatest extent. On the contrary, a bad process design, even if the most advanced equipment is used, can not produce a product that meets the use requirements.

The content of our discussion is a combination of lost foam casting and sand casting for a water-cooled motor shell, that is, EPS is used to form the outer surface and spot injection system of the motor shell, and then the foam pattern is connected to the water jacket core made of the mineral ore sand, and the foam and water jacket core are then dipped and dried. After filling and vibrating, the hot metal is wound under the condition of negative pressure to the sand box, the obtained wool is annealed one by one, then the sand is shaken, cleaned, and the products that meet the design and use requirements are obtained after tempering.

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