CN-121989346-A - Composite material blade preparation method, mold assembly and layering mold pressing auxiliary device

CN121989346ACN 121989346 ACN121989346 ACN 121989346ACN-121989346-A

Abstract

A mould assembly, a layering mould pressing auxiliary device and a preparation method of a composite material blade are provided, wherein the mould assembly comprises a blade basin mould, a central piece and a blade back mould, part of ceramic matrix composite material layering is attached to a blade basin forming surface of the blade basin mould, the other part of ceramic matrix composite material layering is suspended, the central piece is pressed on the other side of the ceramic matrix composite material layering attached to the blade basin forming surface, the other suspended part of ceramic matrix composite material is bent around the central piece and laid, the blade back mould and the blade basin mould are clamped, and the ceramic matrix composite material layering is compacted.

Inventors

BAO QILI
HONG HUI
DU HUI
ZHANG SHIYAO
CAO YUAN
ZHANG YISHANG
HOU NAIXIAN

Assignees

中国航发商用航空发动机有限责任公司

Dates

Publication Date: 20260508
Application Date: 20241108

Claims (11)

1. A mold assembly for preparing a composite blade, comprising: The leaf basin die is used for providing a leaf basin molding surface, so that a part of ceramic matrix composite material attached to the leaf basin molding surface is paved to form a leaf basin surface, and a part of ceramic matrix composite material not attached to the leaf basin molding surface is paved to form a suspension part; A center piece arranged on the other side of the ceramic matrix composite layer attached to the molding surface of the leaf basin for surrounding and covering the suspension part, and And the blade back mold is used for closing the mold with the blade basin mold so as to compact the ceramic matrix composite layering.
2. The mold assembly of claim 1 wherein the leading edge of the leaf basin mold is located at a position of positive-negative transition of the curvature of the leaf body on the side of the leaf basin.
3. The mold assembly of claim 1 wherein said back mold comprises a plurality of split molds in the direction of the annular blade, the land between each of said split molds being at an angle of less than 90 ° to the tangential direction of the ceramic matrix composite layup.
4. The mold assembly of claim 1, wherein the center piece is a mandrel or a mandrel preform.
5. The mold assembly of claim 1 wherein the side of the basin mold and the back mold in the height direction of the leaves after closing is a first flange molding surface.
6. The mold assembly of claim 1 wherein the center piece further comprises core mold mating blocks on both sides.
7. A layup molding aid for assisting use of a mold assembly according to any one of claims 1-6, wherein the center piece of the mold assembly further comprises core mold mating blocks on both sides, the device comprising: a leaf basin side frame part comprising two opposite side walls and a connecting piece for connecting the two side walls for fixing the leaf basin mould, wherein the side walls are used for supporting the core mould matching block, and And the pressing piece is used for applying downward pressure to the core mould matching module so as to further press down the central piece, so as to compact the ceramic matrix composite layering between the central piece and the leaf basin mould.
8. The decking molding assist device of claim 7 wherein the side wall and the connector are removably connected.
9. The ply-molding assist device of claim 8, further comprising a lateral compression member located on a side wall, the lateral compression member having an axial direction in a blade height direction, an inner end surface of the side wall being a second flange molding surface opposed to a side surface of the leaf basin mold and the leaf back mold in the blade height direction.
10. A method of manufacturing a composite blade, characterized in that a mould assembly according to any one of claims 1-7 is used, the method comprising the steps of: Attaching part of the ceramic matrix composite layer to the molding surface of the leaf basin mold, and suspending the other part of the ceramic matrix composite layer; Pressing the central piece on the other side of the ceramic matrix composite paving layer attached to the molding surface of the leaf basin, and bending and paving the other part of the suspended ceramic matrix composite around the central piece; And closing the back mold and the basin mold, and compacting the ceramic matrix composite layering.
11. The method of manufacturing a composite blade according to claim 10, wherein the length of the ceramic matrix composite layup is made longer than the length of the core mold in the direction of the blade height, and after the back mold and the basin mold are clamped, the portions protruding from the back mold and the basin mold are bent in the direction perpendicular to the blade height and are laid on the end faces of the back mold and the basin mold.

Description

Composite material blade preparation method, mold assembly and layering mold pressing auxiliary device Technical Field The invention relates to the field of blade manufacturing methods, in particular to the field of manufacturing of ceramic matrix composite blades. Background Ceramic matrix composites (Ceramic Matrix Composites, CMC) have the advantages of high temperature resistance, corrosion resistance, low density, and aero-engine hot end blades, such as turbine, compressor blades, etc., are often made from ceramic matrix composites. Parts made from ceramic matrix composites are typically layed up from multiple layers of the composite, requiring a molding process after the layup is completed, and requiring subsequent curing infiltration, etc. The accuracy of the early-stage layering can obviously influence the surface accuracy of the final product, but the ductility of the ceramic matrix composite layering layer is poor, and defects such as wrinkles, cavities, separation and the like are easy to occur in the process of layering and molding complex molded surfaces, so that the layering quality is influenced. Disclosure of Invention An object of the present invention is to provide a mold assembly, a layup molding auxiliary device, and a method of manufacturing a composite blade, capable of effectively improving the surface accuracy of a formed blade. The mold assembly for achieving the purpose is used for preparing the composite material blade and comprises a leaf basin mold, a center piece and a leaf back mold, wherein the leaf basin mold is used for providing a leaf basin molding surface, a part of ceramic-based composite material paved on the leaf basin molding surface forms a leaf basin surface, a part of ceramic-based composite material paved on the leaf basin molding surface, the part of ceramic-based composite material paved on the leaf basin molding surface does not form a suspension part, the center piece is arranged on the other side of the ceramic-based composite material paved on the leaf basin molding surface and used for surrounding and paving the suspension part, and the leaf back mold is used for closing the leaf basin mold so as to compact the ceramic-based composite material paved. In one or more embodiments, the leading edge of the leaf basin mold is located at a position of positive-negative transition of the curvature of the blade body on the side of the leaf basin. In one or more embodiments, the blade back mold comprises a plurality of split molds along the annular blade shape direction, and the included angle between the clamping surface of each split mold and the tangential direction of the ceramic matrix composite layering is smaller than 90 degrees. In one or more embodiments, the core member is a mandrel or a mandrel preform. In one or more embodiments, the side surface of the basin mold and the back mold along the height direction of the blade after the basin mold and the back mold are clamped is a first flange plate molding surface. In one or more embodiments, the center piece further includes core mold mating blocks on both sides. The layering mould pressing auxiliary device for achieving the purpose is used for assisting the use of the mould assembly and comprises a leaf basin side frame part, a pressing piece and a pressing piece, wherein the leaf basin side frame part comprises two opposite side walls and a connecting piece, the two opposite side walls are connected with each other and used for fixing a leaf basin mould, the side walls are used for supporting a core mould matching block, the pressing piece is used for applying downward pressure to the core mould matching block and then pressing down the central piece so as to compact a ceramic matrix composite layering located between the central piece and the leaf basin mould. In one or more embodiments, the side wall and the connector are removably connected. In one or more embodiments, the device further comprises a lateral pressing member located on the side wall, wherein the axial direction of the lateral pressing member is the leaf height direction, the inner end surface of the side wall is a second edge plate forming surface, and the second edge plate forming surface is opposite to the side surfaces of the leaf basin die and the leaf back die along the leaf height direction. The method for preparing the composite blade comprises the steps of attaching part of ceramic matrix composite layers to the molding surface of a blade basin mold, suspending another part of ceramic matrix composite layers, pressing a center piece on the other side of the ceramic matrix composite layers attached to the molding surface of the blade basin, bending and paving the suspended another part of ceramic matrix composite layers around the center piece, and closing the blade back mold and the blade basin mold to compact the ceramic matrix composite layers. In one or more embodiments, the length of the ceramic matrix composite layup is made