Rapid metal die manufacturing method for turbine blades

Abstract

The invention discloses a rapid metal die manufacturing method for turbine blades. The method includes: designing a die structure, subjecting the structure to shell extraction by 3-5mm and removing the non-mating surface, using stereolithography equipment to prepare a die resin part, carrying out electric arc spraying to obtain a low-melting-point alloy with a thickness of 3-6mm, employing strong alkali corrosion to remove light-cured resin so as to obtain a metal die shell, assembling it with a metal conformal cooling pipeline obtained also by photocuring spraying corrosion, then conducting filling with metal powder and a melted low-melting-point solder mixture, carrying out curing and polishing, thus obtaining the die. The metal die is manufactured by combining photocuring rapid formation, electric arc spraying, resin corrosion and other technologies within 5-8 days, its precision can reach the CT4 grade, and the die has good thermal conductivity and high strength, thus ensuring uniform and rapid cooling of a wax die during formation.

Description

technical field [0001] The invention belongs to the technical field of rapid molding, and relates to a rapid manufacturing method of a metal mold for turbine blades. Background technique [0002] The lost wax method is a method of investment casting. The surface of the wax mold is covered with refractory materials to make a mold shell. After melting the mold and losing the wax, it can be cast at a high temperature after roasting to obtain precision castings. Castings obtained by investment casting can achieve near-net shape, and are widely used in aerospace, automotive and other parts that require high precision. In lost wax casting, the wax pattern is the intermediate three-dimensional shape transfer part of precision casting, and its quality directly determines the precision of the casting. Turbine blade is one of the parts with the worst working environment and the most complex structure in the engine, and its manufacturing method has always been the focus and difficulty...

AI Technical Summary

Problems solved by technology

[0004] The conformal cooling channel is a structure to be considered in the design of the injection mold. The conformal cooling channel of the resin material can be manufactured by using the light curing rapid prototyping technology. Since the thermal conductivity of the general resin material is very low (less than 0.5W / (m·℃)), The cooling speed of resin mold wax pattern is slow, resulting in long wax pattern manufacturing cycle, large thermal deformation of wax pattern and mold, and many quality defects of wax pattern during cooling process, which directly affects the quality of precision casting castings

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