A Method for Controlling the Offset Dimensions of Water-Soluble Core Wax Patterns of Complex Thin-walled Hollow Castings

Abstract

The invention provides a method for controlling the offset size of a water-soluble core wax mold of a complex thin-walled hollow casting, comprising: restraining the two ends of the water-soluble core wax mold in the length direction by fixed ends, so that the two ends of the water-soluble core wax mold are fixed; Three positioning cores are arranged on at least two sides of the wax mold, and the three positioning cores are distributed in a triangle, forming a triangular positioning structure on each side; a plurality of bonding cores are also arranged on the above two sides of the water-soluble core wax mold support; the water-soluble core wax mold after the above treatment is placed in the cavity of the hollow wax mold mold for injection molding to obtain a hollow thin-walled wax mold, and the holding pressure of the hollow thin-walled wax mold injection is 100%-120% of the maximum injection pressure, so that The water-soluble core wax mold will not shift and break under the pressure of the liquid paste wax injection, and will not cause dimensional deviation of the hollow thin-walled wax mold. The invention solves the problem of wall thickness deviation of the hollow thin-wall wax mold by controlling the deviation of the water-soluble core wax mold in the injection molding process of the hollow thin-wall wax mold.

Description

technical field [0001] The invention relates to the field of investment precision casting of complex hollow thin-walled castings, in particular to a method for controlling the offset size of a water-soluble core wax mold of complex thin-walled hollow castings. Background technique [0002] With the development of high thrust-to-weight ratio aero-engines, the structure of its key hot-end castings is developing in the direction of integration, thinning, and complexity. This not only requires high load-carrying capacity for aero-engines, but also puts forward requirements on the dimensional accuracy of castings. new challenges. In order to realize the lightweight of castings, a large number of castings with hollow thin-walled structures are produced, which is also one of the advantages of investment casting. The hollow struts and hollow blades of the aero-engine casing are typical hollow components with an inner cavity structure. The high-temperature alloy casing of an aero-e...

AI Technical Summary

Problems solved by technology

[0006] Therefore, at present, there is no solution for the deviation of the wall thickness of the hollow thin-walled wax pattern in the existing technology. The wall thickness of the wax pattern at the deviation part is 2mm±0.7mm. The solution to the deviation of mold wall thickness

Images