Reduction gearbox shell casting process

Abstract

The invention relates a reduction gearbox shell casting process, which comprises the following steps: preparing molding sand and oil core sand first, then preparing a mold, wherein the mold comprises a sand box, a sand mold, a sand core and a pouring system; the pouring system comprises a sprue, cross gates and a pair of auxiliary cross gates arranged between two pouring cavities the sides of which are adjacent to each other; the sprue is vertically arranged at the center of four pouring cavities; an outer sprue is formed in the top of the sprue; the bottom end of the sprue is communicated with the inner sprue of a corresponding pouring cavity through cross gates at two sides and a cross gate; and finally the product is put in storage after falling sand cleaning checking. The reduction gearbox shell casting process has the advantages that the mold is reasonable in design and high in work efficiency; the auxiliary cross gates are additionally arranged in the mold design and the pouring temperature is controlled, so that the phenomena of cold shut and hot spot are reduced; by virtue of the oil sand core prepared during tool preparation, the surface of a casting is smooth; by virtue of a hollow molding core and exhaust pins distributed at equal intervals, the ventilation is facilitated and the pore defect is avoided.

Description

technical field [0001] The invention relates to a gear box shell, in particular to a casting process for the gear box shell. Background technique [0002] The gearbox is a necessary part of the reducer, and it is mainly cast, such as figure 2 A gearbox housing is shown, which comprises a housing body and an input 14 and two output 15 and 16 . [0003] At present, due to the unreasonable design of the gating system, it is impossible to process the gearbox shell with a wall thickness of only 6mm, and it is easy to cause cold shutting during the pouring process; The unreasonable design of the gas device will produce a large number of pores, and the product quality will decline; therefore, it is urgent to develop a casting manufacturing process that can cast a wall thickness of only 6mm or less. After searching, it is not found that the same as the present invention or similar technical solutions. Contents of the invention [0004] The technical problem to be solved by the...

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Problems solved by technology

[0003] At present, due to the unreasonable design of the gating system, it is impossible to process the gearbox shell with a wall thickness of only 6mm, and it is easy to cause cold shutting during the pouring process; The unreasonable design of the gas device will produce a large number of pores, and the product quality will decline; therefore, it is urgent to develop a casting manufacturing process that can cast a wall thickness of only 6mm or less. After searching, it is not found that the same as the present invention. or similar technical solutions

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