Production process of integrated water-cooled motor casing for new energy vehicles

Abstract

The invention relates to a production process for an integrated type water-cooled motor shell of a new energy automobile, and belongs to the field of motor shell production and manufacturing. The main process is characterized in that a precoated sand core manufacturing method is adopted for manufacturing a water channel core, the outer layer of the water channel core and the interior of a mold core are coated with refractory matter, then the water channel core is fixed into a mold, and a water-cooled motor shell casting blank is obtained through low-pressure pouring; then the water-cooled motor shell casting blank is subject to solid solution aging treatment, and after solid solution aging treatment is completed, welding sealing is carried out on a process hole of a water-cooled motor shell casting; and finally, the outer side of the water-cooled motor shell is subject to cleaning, precision machining and checking to obtain the integrated type water-cooled motor shell finished product. The production process is simple, time and labor are saved, the production efficiency is high, and the manufacturing cost is low; and the produced motor shell is subject to molten aluminum integrated casting molding, the radiating performance is good, the inner wall of the motor shell is smooth and flat, the combination property of the product is stable, and the requirement of a water-cooled drive motor of the new energy automobile can be well met.

Description

technical field [0001] The invention relates to a production process of an integrated water-cooled motor casing for a new energy vehicle, belonging 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 coefficient are di...

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, which cannot meet the requirements of water-cooled motors for new energy vehicles