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

A technology for ductile iron and railway passenger cars, which is used in manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of low temperature resistance of complex casting gearboxes, and achieve the effects of uniform and dense casting structure, sufficient floating, and stable filling.

Active Publication Date: 2010-08-18
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Embodiment 1

[0017] Trial production of ductile iron gearbox castings for railway passenger car bogies, material QT400-18AL, weight 153kg, filling time 15s, pouring temperature 1420-1430℃.

[0018] The casting process scheme of the gearbox of the railway passenger car bogie in this embodiment is as follows:

[0019] 1) The spherical corkscrew sprue cup is used, and the molten metal does not splash during the filling process, and the volume of the sprue cup is equal to the volume of the molten metal of the casting. Bottom-leakage pouring is adopted, filling is stable, preventing gas and inclusions from getting involved, and reducing defects such as inclusions and pores. When pouring, the sprue cup is filled first, and after the sprue cup is filled, the spherical plug is pulled up, and the molten metal is filled into the cavity.

[0020] 2)Using furan resin sand modeling and core punching, the surface is brushed with special zirconium powder alcohol-based paint for nodular iron, stir evenly during...

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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 the casting processes and smelting processes of the nodular cast iron gearboxes of railway passenger car bogies, in particular to a casting method of nodular cast iron gearboxes of railway passenger car bogies, which is suitable for the manufacturing process of railway passenger car bogie gear boxes. Background technique [0002] The railway passenger car bogie gearbox is a key component of the passenger car, and it is the carrier of the drive shaft and the bevel gear. It bears dynamic loads and is prone to fatigue. The gearbox working environment is harsh, especially when the train runs in the northern winter, it needs to withstand the test of low temperature. In order to ensure the safety of railway operations, it is necessary to develop anti-fatigue and low-temperature gearbox castings. Summary of the invention [0003] The purpose of the present invention is to provide a casting process for the nodular cast iron gearbox of a...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22C9/08
Inventor 夏立军李殿中桑宝光刘宏伟李依依
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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