Flaskless pouring manufacturing method of thin-wall revolving body aluminum alloy casting

Abstract

The invention relates to a flaskless pouring manufacturing method of a thin-wall revolving body aluminum alloy casting, which comprises the following steps of: mounting a flaskless pouring tool on a workbench; after the molding sand is solidified, the product mold and the casting system mold are taken out, forming the appearance of the product and a cavity sand mold of the casting system; filling a product core box with the molding sand, disassembling the core box after the molding sand is pounded, and obtaining a loam core; smelting alloy liquid; processing fins on the loam core and coating the loam core; combining the sand mold and the mud core, and confirming that a cavity gap between the inner wall of the sand mold and the outer wall of the mud core meets the requirement; carrying out flaskless pouring on a working table, injecting the alloy liquid into a cavity, cooling, and carrying out sand removal to obtain a casting; removing a casting system on the casting, and polishing the appearance of the casting; performing solid solution heat treatment on the casting; performing rotary extrusion shaping on the casting, so that the casting reaches the casting state within the dimensional tolerance range; and putting the casting into an aging furnace to be subjected to aging treatment. The pouring process can be greatly simplified, and the product quality is improved.

Description

technical field [0001] The invention relates to a precision casting method, in particular to a boxless casting manufacturing method of a thin-walled revolving aluminum alloy casting, which belongs to the technical field of precision casting. Background technique [0002] The sand mold is a casting cavity made of raw sand, binder and other auxiliary materials in the casting production process. The traditional process uses a sand box to complete the production of the sand mold. Together with the upper and lower sand boxes, the molding sand packed tightly in the upper and lower sand boxes is called the upper sand mold and the lower sand mold, respectively. After the pattern is taken out of the sand mold, the cavity left is called the cavity. [0003] The core is commonly known as "mud core". It is used to form the internal structure of the casting during casting. It is often made of core sand made of raw sand and binder, and is made by hand or machine in the core box. The cor...

AI Technical Summary

Problems solved by technology

For the economical consideration of production electricity, each heat treatment batch will be fully filled; this will lead to deformation of the castings, especially the thin-walled rotary aluminum alloy castings with a thickness of less than 5mm have a greater risk of deformation, and the direction of deformation is unpredictable

[0007] When deformation occurs, it can only be corrected by manual shaping and real-time measurement, because after solid solution treatment, the temperature of the casting surface reaches the boiling water temperature, manual shaping and measurement will face the danger of being scalded, and the measuring tool is at a higher temperature. There will also be errors under temperature, which will affect the accuracy of plastic surgery

Furthermore, if conditions permit, shaping tools with different diameters will be required for plastic shaping by press, which will increase the cost investment, and the tooling and equipment need to be maintained regularly

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