Casting system and casting method for aluminum alloy sleeper beam of standard motor train unit steering frame

Abstract

The invention discloses a casting system and a casting method for an aluminum alloy sleeper beam of a standard motor train unit steering frame. The system is characterized by being composed of random chilling blocks on the upper portion, a middle cavity and a lower metal bottom mold. Cross gates, gate sprues and gap gates are formed in the cavity, and a ceramic filter pipe is arranged at the connecting positions of the cross gates and the gate sprues. The casting method is characterized by comprising the steps that (1) molten aluminum is injected into a casting groove, and enters the gate sprues, and through slag removing of the ceramic filter piece, the molten aluminum enters the double-bridge cross gates, and then enters the cavity; (2) when the middle heat preservation risers, heat preservation risers at the two ends and heat preservation side risers are filled with the molten aluminum by one half, pouring is stopped, the molten aluminum level in the risers descends, and at the moment, a certain amount of the molten aluminum is directly casted into the risers. The system and method have the advantages that a casting manner of gravity two-end opposite casting is adopted, smooth filling is ensured, generation of splashing and casting defects is avoided, the risers and multi-chilling-block chilling feeding are adopted in local heat joints, and the internal quality and body performance of a casting are obviously improved.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a casting system and a casting method for an aluminum alloy bolster of a bogie of a standard train set. Background technique [0002] The cast aluminum alloy bolster is the core component of the EMU bogie. The development of the Chinese standard EMU project will get rid of the restriction and monopoly of foreign technology and further expand the international market. Traditional casting has a low control rate for sand mold deformation, especially for slender castings with a length of more than 3 meters, such as corbel beams. It is even more difficult to guarantee the deformation size, which not only increases the risk of product scrapping, but also causes waste of time and resources. Traditional casting adopts a full sand mold structure, which does not perform well in the control of thermal joints in complex and large-area inner cavity castings, and the pinholes on the machined ...

AI Technical Summary

Problems solved by technology

Traditional casting has a low control rate for sand mold deformation, especially for slender castings with a length of more than 3 meters, such as corbel beams, it is more difficult to guarantee the deformation size, which not only increases the risk of product scrapping, but also causes waste of time and resources

Traditional casting adopts a full sand mold structure, which does not perform well in the control of thermal joints in complex and large-area inner cavity castings, and the pinholes on the machined surface cannot meet the grade requirements

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