A device for preventing a large number of point-like PT defects from occurring after blade casting processing

Abstract

The utility model relates to vane casting device technical field, concretely relates to a device for preventing a large number of point PT defects after vane casting processing, including the vane model for simulating vane shape and structure, the cold iron for adjusting the cooling speed of casting and the circular blind riser for supplementing the solidification process of casting, the circular blind riser is configured to be placed on the specific position of vane model easy to produce point defects determined through detection, and multiple cold irons are arranged between the circular blind riser according to the preset interval distance, to synergistically control the temperature field of the casting area, the blind riser is used to fully supplement the casting defect-prone position, the cold iron is used to divide the supplementing area and control the solidification sequence of the casting, so that the gas and slag produced during solidification can be promptly discharged into the blind riser. Improve the quality of casting, reduce the cost of later repair, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of blade casting equipment, specifically to a device for preventing a large number of point-like PT defects from occurring after blade casting. Background Technology

[0002] In the blade casting process, point-like PT defects (such as porosity and shrinkage cavities) are common quality problems. These defects can seriously affect the mechanical properties and service life of the blades. As a critical component, the blade has a complex structure, especially in areas with uneven wall thickness or abrupt shape changes. During the solidification process, the molten metal is prone to point-like defects due to insufficient feeding, uneven cooling rate, and other reasons.

[0003] In traditional casting processes, there is a lack of precise parameter control for the setting of dark risers and chills. The selection of the location of dark risers, structural design, and the arrangement and spacing of chills often rely on experience, making it difficult to effectively avoid the occurrence of a large number of point-like PT defects. This increases the difficulty and cost of subsequent processing and also has an adverse effect on the quality stability of the blades. Utility Model Content

[0004] Technical problems to be solved

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a device to prevent a large number of point-like PT defects from appearing after blade casting and processing, which can effectively solve the problems in the existing technology.

[0006] Technical solution

[0007] This invention provides a device to prevent a large number of point-like PT defects from appearing after blade casting. It includes a blade model for simulating the shape and structure of the blade, chills for adjusting the cooling rate of the casting, and circular dark risers for feeding the solidification process of the casting. The circular dark risers are configured to be placed on the blade model at specific locations on which point-like defects are likely to occur, as determined by testing. Multiple chills are arranged between the circular dark risers at preset intervals to coordinately control the temperature field of the casting area.

[0008] Furthermore, the concealed riser is a cylindrical structure with a fixed height and diameter, and the axis of the cylindrical structure is set perpendicular to the surface of the blade model.

[0009] Furthermore, the spacing between two adjacent sets of the dark risers is set to four times the thickness of the blade wall at the location, and the spacing is the straight-line distance between the center points of the two sets of dark risers.

[0010] Furthermore, the chill is a cylinder made of a high thermal conductivity material, and the two end faces of the cylinder are parallel planes.

[0011] Furthermore, each group of chills is arranged sequentially along a predetermined straight line, and the axes of each chill are all in the same plane.

[0012] Furthermore, the spacing between two adjacent sets of chills is 0.5 times the diameter of the chill, and the spacing is the shortest distance between the outer circular surfaces of the two sets of chills.

[0013] Beneficial effects

[0014] This invention utilizes concealed risers to adequately feed castings to areas prone to defects. By using chills to divide the feeding area and control the solidification sequence of the casting, gases and slag generated during solidification can be promptly discharged into the concealed risers. This improves casting quality, reduces subsequent repair costs, and increases production efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0017] Figure 2 This is the second structural schematic diagram of the present invention.

[0018] The labels in the diagram represent: 1. Blade model; 2. Dark riser; 3. Chill. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] The present invention will be further described below with reference to the embodiments.

[0021] Example: A device for preventing numerous point-like PT defects after blade casting, see attached document. Figure 1 -Appendix Figure 2A device for preventing a large number of point-like PT defects after blade casting includes a blade model 1 for simulating the shape and structure of the blade, chills 3 for adjusting the cooling rate of the casting, and circular dark risers 2 for feeding the solidification process of the casting. The circular dark risers 2 are configured to be placed on the blade model 1 at specific locations on which point-like defects are likely to occur, as determined by detection. Multiple chills 3 are arranged between the circular dark risers 2 at preset intervals to coordinately control the temperature field of the casting area.

[0022] The hidden riser 2 is a cylindrical structure with a fixed height and diameter, and the axis of the cylindrical structure is set perpendicular to the surface of the blade model 1. The distance between two adjacent sets of hidden risers 2 is set to 4 times the thickness of the blade wall at the location, and the distance is the straight-line distance between the center points of the two sets of hidden risers 2. By precisely placing the circular hidden risers 2 at the location of the blade model 1 where point defects are prone to occur, and in conjunction with the spaced chills 3, the feeding and cooling control of the defect-prone areas can be targeted, significantly reducing the occurrence of point PT defects and improving the casting quality of the blade. The cylindrical structure of the hidden riser 2 and the fact that its axis is perpendicular to the surface of the blade model 1 are conducive to uniform feeding of the molten metal, improving feeding efficiency and ensuring sufficient solidification of the casting.

[0023] The chill 3 is a cylinder made of a high thermal conductivity material, with its two end faces being parallel planes. Each group of chills 3 is arranged sequentially along a preset straight line, and the axes of each chill 3 are all in the same plane. The distance between two adjacent groups of chills 3 is 0.5 times the diameter of the chill 3, which is the shortest distance between the outer surfaces of the two groups of chills 3. The distance between adjacent dark risers 2 is set to 4 times the blade wall thickness at their location, and the distance between adjacent chills 3 is 0.5 times the diameter of the chill 3. Furthermore, the chills 3 are arranged in a straight line with their axes in the same plane. These precise parameter settings and arrangements can form a reasonable temperature field distribution, ensuring the synergistic effect of cooling and feeding, avoiding defects caused by unreasonable parameters. The overall solution is highly operable and can be stably applied in blade casting production, reducing rework and scrap rates due to defects, saving production costs, and improving production efficiency.

[0024] During the molding process, the hidden riser 2 and the chill 3 are placed on the blade model 1, then sand is poured. After the sand mold solidifies, the blade model 1 is removed, and finally the mold is closed to await casting.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for preventing numerous point-like PT defects from appearing after blade casting, characterized in that, The system includes a blade model (1) for simulating the shape and structure of the blade, chills (3) for adjusting the cooling rate of the casting, and circular dark risers (2) for feeding the solidification process of the casting. The circular dark risers (2) are configured to be placed on the blade model (1) at specific locations on which point defects are likely to occur, as determined by testing. Multiple chills (3) are arranged between the circular dark risers (2) at preset intervals to coordinately control the temperature field of the casting area.

2. The device for preventing numerous point-like PT defects after blade casting according to claim 1, characterized in that, The dark riser (2) is a cylindrical structure with a fixed height and diameter, and the axis of the cylindrical structure is set perpendicular to the surface of the blade model (1).

3. The device for preventing numerous point-like PT defects after blade casting according to claim 1, characterized in that, The spacing between two adjacent sets of the dark risers (2) is set to 4 times the thickness of the blade wall at the location, and the spacing is the straight-line distance between the center points of the two sets of dark risers (2).

4. The device for preventing numerous point-like PT defects after blade casting according to claim 1, characterized in that, The chill (3) is a cylinder made of a high thermal conductivity material, and the two ends of the cylinder are parallel planes.

5. The device for preventing numerous point-like PT defects after blade casting according to claim 4, characterized in that, Each set of chills (3) is arranged sequentially along a preset straight line direction, and the axes of each chill (3) are all in the same plane.

6. The device for preventing numerous point-like PT defects after blade casting according to claim 1, characterized in that, The spacing between two adjacent sets of chills (3) is 0.5 times the diameter of the chill (3), and the spacing is the shortest distance between the outer circular surfaces of the two sets of chills (3).

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