Device and production method for manufacturing automobile rear axle cast through metal mold with sand lining

Abstract

The invention discloses device and production method for manufacturing an automobile rear axle cast through the sand lining process of a metal mold. The device is characterized in that a mud core component is arranged in a mold cavity formed after an upper iron mold and a lower iron mold are assembled, positions of sand shooting holes of the upper iron mold and the lower iron mold are in one-to-one correspondence, gas needles are arranged on an upper mold plate, the gas needles and the sand shooting holes of the upper iron mold are in one-to-one correspondence, a plurality of heating pipes are respectively and uniformly distributed in mold plates of the upper mold plate and a lower mold plate, a temperature control meter of the heating pipes is connected with a temperature sensor, a plurality of exhaust bosses are further uniformly distributed on the peripheries of the mold plates of the upper mold plate and the lower mold plate, water-cooling bases are respectively arranged on the upper mold plate and the lower mold plate, and a plurality of exhaust grooves are arranged on the parting surface of the upper iron mold and the parting surface of the lower mold plate. The automobile rear axle cast manufactured by adopting the device and the method is good in quality, high in size precision, high in process yield, low in production cost, good in a working environment and low in energy consumption.

Description

technical field [0001] The invention relates to a special equipment for manufacturing vehicle rear axle castings and a production method thereof, in particular to a device and a production method for manufacturing automobile rear axle castings covered with metal mold sand. Background technique [0002] The automotive rear axle casting is one of the largest castings in the automotive axle system. The traditional production process of vehicle rear axle castings mainly adopts green mold sand machine molding, and now it is also produced by chilled resin sand casting. [0003] The main problems for green mold sand machine modeling are: low dimensional accuracy of castings, poor surface quality of castings, low stability of casting quality, and high rejects. At the same time, green sand uses a large amount of sand, and the sand processing system is huge and complex, with high energy consumption. The thickness of the rear axle casting is uneven. In order to meet the solidificatio...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a device and production method for manufacturing automotive rear axle castings coated with metal mold sand, so as to solve the problem of traditional green sand molding process and chilled resin sand casting. Bridge castings have problems such as poor casting surface quality, low casting dimensional accuracy, low process yield, high production cost, poor working environment, and high energy consumption.

Solve the problems of core lowering and exhausting in metal mold sand-covered casting; molding and box positioning; the shape of the outer mold cannot be lifted during the molding process; metal mold sand-coated cooling is fast, and it is difficult to produce ferritic ductile iron castings, etc.

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