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

Abstract

The invention provides a metal mold low-pressure casting die for a box body on a cast aluminum gearbox of a high-speed train. The metal mold low-pressure casting die comprises a lower die body, an upper die body, a first sliding block and a second sliding block. A casting cavity is defined by the lower die body, the upper die body, the first sliding block and the second sliding block. The lower die body comprises a lower die base and a sand core. The side, away from a lifting pouring basin, of the lower die base is provided with a sand core positioning groove, a first sliding block limiting groove and a second sliding block limiting groove, wherein the first sliding block limiting groove and the second sliding block limiting groove are symmetrically formed in the two sides of the sand core positioning groove. The two ends of the sand core positioning groove are symmetrically provided with two upper die limiting blocks in the extension direction. The sand core is clamped in the sand core positioning groove. The first sliding block is clamped in the first sliding block limiting groove. The second sliding block is clamped in the second sliding block limiting groove. The upper die body comprises an upper die base. The side, away from a third molding groove, of the upper die base is provided with an ejection connecting mechanism. A produced casting is dense in structure, clear in outline, stable in mechanical performance and good in dimensional stability consistency, the inner surface and the outer surface are smooth, an inner cavity and an oil return groove are more clearly molded, and the casting yield is high.

Description

technical field [0001] The invention relates to the technical field of casting aluminum gear boxes, in particular to a low-pressure casting mold for the upper box body of a cast aluminum gear box for high-speed trains. 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 iron ...

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. Due to casting defects such as unstable mechanical properties of the alloy, poor product appearance quality, poor dimensional consistency, severe sand loss in the labyrinth oil tank, and incomplete molding, it is difficult for the sand core casting process to meet the special properties of the high-speed train gearbox box. A casting mold that can meet the requirements of the high-speed train gearbox box is very important

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