Cooling device and method of aluminum alloy housing for automobile gear transmissions

Abstract

The invention discloses a cooling device and method of an aluminum alloy housing for automobile gear transmissions. The cooing device comprises an inflow part, a sealing plug and a cooling part; one end of the inflow part is connected with the sealing plug; the other end of the inflow part is connected with the cooling part; the inflow part is provided with a water inlet; the cooling part comprises a water outlet and a cooling water pipe; the position of the water outlet corresponds to the position of an overheat point of the aluminum alloy housing; one end, connected with the inflow part, of the cooling water pipe is provided with a groove; the cooling water pipe can be rotated under the action of a tool matching with the groove; the other end of the cooling water pipe is closed. The cooling device and method has the advantages that fixed-point directional cooling of the overheat point can be achieved, the technical requirement of the production of transmission motor housings for fewer shrinkage cavities is met, product qualification rate is significantly increased, and production cost is saved.

Description

technical field [0001] The invention relates to the technical field of automotive gear transmission processing, in particular to a cooling device for an aluminum alloy housing of a low-leakage automotive gear transmission, and also relates to a cooling method for an aluminum alloy housing of an automotive gear transmission using the device. Background technique [0002] The automotive gear transmission is a structure designed to change the speed of the vehicle according to the driver's will during the driving process. Due to the large and thick structure of the vehicle gear transmission and the thin and thin structure in the middle, it is difficult to achieve the ideal temperature in die-casting gradient. The thick part requires relatively low temperature to reduce shrinkage cavity, and the thin part requires relatively high temperature to improve the fluidity of the material. However, in the current production, the thick part cannot maintain a regular shape, resulting in u...

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Problems solved by technology

[0003] Using the cooling water circuit to solve the shrinkage cavity problem in die-casting is a better method. However, the cooling structure commonly used in the mold currently has a large cooling surface in the actual use process, and the cooling water adjustment is limited, resulting in a low temperature on the mold. Due to the influence of the cooling pipeline, the temperature is lower, and the product has defects such as cold insulation, that is, while satisfying the cooling heat section, it has a bad influence on the position that does not need cooling due to the large cooling range; or The cooling circuit satisfies the temperature regulation of other positions, but the temperature of the cooling heat section is too high, resulting in shrinkage cavity

Therefore, it is difficult to ensure the cooling effect of the hot section without affecting the temperature of other positions during process adjustment.

Especially when using the die-casting process to produce automotive gear transmissions, the problem of a large number of loose spots in the thick wall parts has not been solved.

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