Method for casting end cap of transmission end of traction motor on subway locomotive

Abstract

The invention relates to a method for casting an end cap of a transmission end of a traction motor on a subway locomotive. According to the method, a sand faced permanent iron molding technology is adopted. Through the sand faced permanent iron molding technology, a cavity which is in the shape of a complete end cap of the transmission end is obtained, and four cores are fed to directly cast a part of the end cap of the transmission end, appearance and inner quality of castings are improved effectively, scrappage of the castings is reduced, weight of the castings is reduced by 16%, production efficiency is improved greatly, and a large amount of time and cost of labor and equipment are saved. By the method, the cost is reduced by 28%. Moreover, the method is simple and practical, obvious in economic benefit, wide in market prospect and suitable for most of enterprises.

Description

technical field [0001] The invention belongs to the field of casting, and in particular relates to a method for casting a traction electric transmission end cover on a subway locomotive by adopting an iron mold sand-covering process. Background technique [0002] In the existing industrial production, self-hardening sand molding technology is used to produce transmission end cover castings. The process has the following defects in the process of preparation: due to the slow cooling of molten iron in the no-hardening sand process, shrinkage porosity, shrinkage cavities, and cracks are generated inside the casting, and the quality is unstable; the cooling speed of the casting is slow, the internal structure is not compact, and the spheroidization level Low (level 3), the material is unstable; the appearance of the casting is rough and poor; the machining allowance of the casting is large, the material is wasted, and the machining cost is high; the production process is complic...

AI Technical Summary

Problems solved by technology

The process has the following defects in the process of preparation: due to the slow cooling of molten iron in the no-hardening sand process, shrinkage porosity, shrinkage cavities, and cracks are generated inside the casting, and the quality is unstable; the cooling speed of the casting is slow, the internal structure is not compact, and the spheroidization level Low (level 3), the material is unstable; the appearance of the casting is rough and poor; the machining allowance of the casting is large, the material is wasted, and the machining cost is high; the production process is complicated, the labor intensity of the workers is high, and the production efficiency is low; Large dosage, resulting in high production cost

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