Radiator case for maglev train and casting method thereof

Abstract

The invention discloses a radiator case for a maglev train in the field of train part manufacturing. The radiator case comprises a case body and reinforcing ribs, and the thickness of the reinforcingribs is less than or equal to 2.6 mm. The casting method comprises the following steps that: 1, a mold is installed on a low-pressure casting machine; 2, the mold is heated to 170-200 DEG C for the first time, and then the surface of an inner cavity of the mold is sprayed with heat preservation paint; 3, a thermal insulation coating is sprayed on the mold to perform heating the mold to 350-380 DEGC, a heating tube is electrified, it is ensured that the temperature of the upper mold blade is 350-380 DEG C, and the mold is closed; and 4, after the mold is closed, the liquid rising pipe orificecommunicates with the molten aluminum feeding end, and then the molten aluminum is cast and formed to obtain the radiator case; molten aluminum casting forming comprises three stages. In the first stage, molten aluminum is cast for 9s to 11s under the mold filling pressure of 300 mbar to 320 mbar; molten aluminum is subjected to first-stage casting and then subjected to mold-filling pressure casting for 11-13 s at 450-480 mbar, and the molten aluminum is subjected to second-stage casting and then subjected to mold-filling pressure casting for 10-12 s at 680-720 mbar. The radiator case for themaglev train prepared by the scheme has the characteristics of high strength and small thickness.

Description

technical field [0001] The invention belongs to the field of train component manufacturing, in particular to a radiator case for a magnetic levitation train and a casting method thereof. Background technique [0002] The radiator case of maglev train is an important accessory on the maglev train. In order to ensure the demand for train components with a speed of 600 kilometers or more per hour, the radiator case for maglev trains is required to have the characteristics of high strength and light weight; and aluminum alloy materials can be better meet that need. At present, sand casting is mainly used to produce radiator cases for maglev trains. During sand casting, the flow of molten aluminum is automatically formed by the shape of the product, the product is poor in compactness, the surface of the sand mold is rough, and when the thickness of the rib reaches 2.6mm, all of them must be cast The machining center can only meet the size requirements; and in order to meet the s...

AI Technical Summary

Problems solved by technology

During low-pressure casting of the radiator case for maglev trains, in order to ensure the air permeability and strength of the radiator case for maglev trains, a plurality of reinforcing ribs are evenly distributed on the top of the radiator case for maglev trains. Clearance, because the ribs on the radiator chassis for maglev trains are too thin (generally, the thickness of the ribs should be within 4mm), it is difficult to cast the radiator chassis for maglev trains

Although the high-pressure casting method can realize the molding of the radiator case for maglev trains, the cast radiator case for maglev trains cannot meet the tensile strength of A365. The strength requirements index of elongation, hardness of 90HBS, shear strength of 230mpa and rotational bending fatigue strength of 165mpa

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