Technology for casting nodular cast iron gearbox for railway passenger car bogie

Abstract

The invention relates to all casting processes and smelting processes for a nodular cast iron gearbox of a railway passenger car bogie, in particular discloses a method for casting the nodular cast iron gearbox of the railway passenger car bogie, which is suitable for the manufacturing process of the gearbox of the railway passenger car bogie. By adopting a spherical unplugging type pouring cup, the filling time is controlled, so that the liquid metal is filled steadily, and the casting defects of inclusion, air holes, and the like are effectively controlled. By adopting resin sand molding, azircon powder coating is brushed on the surface, so the surface quality of the castings is improved, and the surface machining allowance is reduced. By adopting low-temperature mold dismantling, the thermal stress of the castings is reduced, the casting deformation is reduced, the dimensional precision is improved, and the foundation for the mass production of the gearbox is laid. The method can solve the problems of the casting of the nodular cast iron pieces with a thin-wall complex structure, low temperature resistance of the gearbox, and the like.

Description

technical field [0001] The invention relates to all casting processes and smelting processes of the nodular cast iron gear box of the railway passenger car bogie, in particular to a casting method of the nodular cast iron gear box of the railway passenger car bogie, which is suitable for the manufacturing process of the bogie gear box of the railway passenger car. Background technique [0002] The railway passenger car bogie gearbox is a key component of the external suspension of the passenger car, and it is the carrier of the drive shaft and bevel gear. It is subject to dynamic load and is prone to fatigue. The working environment of the gearbox is harsh, especially when trains run in winter in the north, they need to withstand the test of low temperature. In order to ensure the safety of railway operations, it is necessary to develop gearbox castings that are resistant to fatigue and low temperature. Contents of the invention [0003] The object of the present inventio...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a casting process of nodular cast iron gearboxes for railway passenger car bogies, which solves the problems of casting of ductile iron castings with thin-walled complex structures and the low temperature resistance of gearboxes, etc.