Metal mold low-pressure casting mold for lower box body of high-speed train cast aluminum gearbox

Abstract

The invention provides a metal mold low-pressure casting mold for a lower box body of a high-speed train cast aluminum gearbox. The metal mold low-pressure casting mold comprises a lower mold, an upper mold, a first sliding block and a second sliding block. A casting cavity is defined by the lower mold, the upper mold, the first sliding block and the second sliding block. A sand core positioning groove is formed in the side, away from a liquid rise pouring basin, of a lower mold base. A first limiting block and a second limiting block are arranged at the two ends of the sand core positioning groove in the extension direction respectively. The first sliding block and the second sliding block are symmetrically arranged on the two sides of a sand core. A first forming convex block matched with the sand core is arranged on the side, close to the sand core, of the first sliding block. A second forming convex block matched with the sand core is arranged on the side, close to the sand core, of the second sliding block. The upper mold comprises an upper mold base. The upper mold base is provided with a forming groove matched with the sand core. The upper mold is connected with the first limiting block and the second limiting block in a clamped manner through a first limiting block clamping groove and a second limiting block clamping groove. Produced castings are compact in structure, clear in contour, stable in mechanical performance and high in casting yield, and the inner surfaces and the outer surfaces of the castings are smooth.

Description

technical field [0001] The invention relates to the technical field of high-speed train cast aluminum gearbox casting, in particular to a high-speed train cast aluminum gearbox lower box metal mold low-pressure casting mold. Background technique [0002] With the global energy problem and the deteriorating living environment of human beings, in the face of increasingly serious traffic congestion on roads, and aviation concerns about high oil prices, high-speed railways are fast, with large carrying capacity, low energy consumption, low cost, and popular green and environmentally friendly travel transportation Tools are evolving at a rapid pace. The improvement of speed means the improvement of technology. In recent years, in order to achieve the purpose of reducing the weight of vehicles, high-strength cast aluminum alloys have been successfully used for high-speed train gearboxes at home and abroad to replace traditional cast iron alloys. Compared with the traditional cast...

AI Technical Summary

Problems solved by technology

[0003] At present, the sand casting process is adopted for cast aluminum gearboxes at home and abroad, but in actual production, it is found that the use of sand core casting has low productivity, harsh production environment, high labor intensity, high scrap rate and serious waste of resources. Casting defects such as unstable mechanical properties of the alloy, poor product appearance quality, poor dimensional consistency, serious sand loss in the labyrinth oil tank, and incomplete molding

Therefore, the sand core casting process is difficult to meet the special properties of high-speed train gearbox boxes, so it is very important to develop a casting mold that can meet the requirements of high-speed train gearbox boxes.

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