Casting technology of water-cooled motor shell, provided with nine turns of spiral waterways, for new energy automobile

Abstract

The invention relates to a casting technology of a water-cooled motor shell, provided with nine turns of spiral waterways, for a new energy automobile, and belongs to the field of motor shell manufacturing. Nine turns of spiral waterway cores are manufactured by adopting a hot box precoated sand coremaking method, 17 positioning core prints are arranged on the nine turns of spiral waterway cores, the 17 positioning core prints and the nine turns of spiral waterway cores are integrally formed, and the nine turns of spiral waterway cores are fixed in a water-cooled motor shell die through the matching of the 17 positioning core prints and positioning holes in the water-cooled motor shell die so as to pour molten aluminum smelted in a gas stove under low pressure in the water-cooled motor shell die by a low-pressure casting process to obtain a water-cooled motor shell casting blank. The casting technology has the advantages that the production process is simple, time and labor are saved, the production efficiency is high, the manufacturing cost is low, the radiating performance is high, the comprehensive performance of the product is stable, and the requirement of the water-cooled driving motor for the new energy automobile can be well met.

Description

technical field [0001] The invention relates to a casting process for a water-cooled motor casing of a nine-turn spiral waterway new energy vehicle, which belongs to the field of motor casing production and manufacturing. Background technique [0002] At present, in the field of production of water-cooled motor housings for new energy vehicles, there are two main process methods. One is the method of two-body welding of the inner shell and the outer shell. This process requires casting the inner shell and the outer shell separately, and then machining them separately. , process a spiral channel on the inner shell, and then weld it as a whole, which is labor-intensive, inefficient, high-cost, unstable in quality, and prone to weld leakage. The other is the method of embedding copper or stainless steel pipes inside the motor casing. The disadvantage of this process is that the materials of the water channel and the body are different, the thermal conductivity and expansion coe...

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of production of water-cooled motor housings for new energy vehicles, there are two main process methods. One is the method of two-body welding of the inner shell and the outer shell. This process requires casting the inner shell and the outer shell separately, and then machining them separately. , process a spiral water channel on the inner shell, and then weld it as a whole, which is labor-intensive, inefficient, high-cost, and unstable in quality, prone to weld leakage

The other is the method of embedding copper or stainless steel pipes inside the motor casing. The disadvantage of this process is that the materials of the water channel and the body are different, the thermal conductivity and expansion coefficient are different, and they cannot be integrated after the embedding, resulting in water cooling. The heat dissipation performance of the chassis is poor, especially when the number of water channels exceeds 8 and the total length of the water channels exceeds 1.5 meters, the cooling effect drops sharply, which cannot meet the requirements of water-cooled motors for new energy vehicles