A molding method for precision casting of a three-layer ring wall and two-layer vane vortex device

Abstract

The invention relates to a molding method of a three-layer-annular-wall two-layer-blade swirler precise casting. The method is characterized in that the requirements of the molding method of the three-layer-annular-wall two-layer-blade swirler precise casting are that: a wax mold of the precise casting is prepared through a ring-in-ring forming method wherein a larger and a smaller ceramic molding cores are coated between an inner-layer wax mold and an outer-layer wax mold; blade through holes used for forming blades are provided on the periphery of the ceramic mold cores; a key-shaped boss is designed on the end face of the molding core; positioning is carried out in a key-shaped positioning recess provided on the wax mold, such that positions and angles of two layers of blades can be controlled. With the method, the molding of the three-layer-annular-wall two-layer-blade swirler precise casting is realized. According to the invention, with the ring-in-ring wax mold forming method wherein the larger and the smaller ceramic molding cores are coated between the inner-layer wax mold and the outer-layer wax mold, a blank in molding technology of a multilayer-annular-wall multi-blade swirler precise casting is filled up, and swirler precise casting small-batch production is realized. Also, great economic benefit is provided.

Description

technical field [0001] The invention relates to the technical field of precision casting and molding of complicated vortex vortex precision castings mainly applied to various aero-engines and gas turbines, and in particular provides a molding method for precision castings of vortex vortex precision castings with three-layer ring walls and two-layer blades. Background technique [0002] The structure of the traditional vortexer is relatively simple. It is composed of two layers of blades distributed between the ring walls. The gap between the ring walls and the blades is relatively large, and the shell can be painted and filled. Therefore, in precision casting production, Generally, the overall mold can be designed and manufactured, the complete wax model can be pressed, and the shell can be painted. However, it is difficult to make shells with paint between the rings and between the blades, and the shells are thin in thickness, incompletely dried, and low in strength, and of...

AI Technical Summary

Problems solved by technology

However, it is difficult to make shells with coatings between the rings and between the blades, and the shells are thin in thickness, incompletely dried, and low in strength, and often run out of fire, causing batches of castings to be scrapped.

The vortex in this project is small in size, thin-walled and hollow, and has a complex structure. It is composed of inner, middle and outer three-layer special-shaped ring walls. It is impossible to design and manufacture the overall mold, and it is also impossible to paint the shell and clean the shell. Therefore, new methods must be explored. Vortex Forming Technology

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