阅读说明：本技术 一种用于叶片电子束焊接的飞溅防护组件及叶片焊接方法 (Splash protection assembly for blade electron beam welding and blade welding method ) 是由 张校宇 杨霄 周小文 彭涛 胡彦彬 卿颖 杨鑫 程立 吴小兰 张世贵 于 2021-09-29 设计创作，主要内容包括：本发明公开了一种用于叶片电子束焊接的飞溅防护组件及叶片焊接方法,属于航空发动机叶片焊接技术领域。一种用于叶片电子束焊接的飞溅防护组件,包括：相互连接的第一挡片和第二挡片；第一挡片和第二挡片之间形成用于夹持叶片的夹持空间；第一挡片和第二挡片的外侧设有外侧防护层,第一挡片和第二挡片的内侧围绕夹持空间设有内侧防护层,外侧防护层和内侧防护层之间形成飞溅防护空间,内侧防护层的内侧形成叶片保护空间。本发明通过内侧防护层对叶片进行保护,焊接产生的飞溅通过外侧防护层和内侧防护层进行飞溅防护,从而大幅度降低叶片受飞溅的影响,提高叶片电子束焊接后的质量。(The invention discloses a splash protection assembly for blade electron beam welding and a blade welding method, and belongs to the technical field of welding of blades of aero-engines. A splash guard assembly for electron beam welding of blades, comprising: the first blocking piece and the second blocking piece are connected with each other; a clamping space for clamping the blade is formed between the first baffle and the second baffle; the outer side of the first separation blade and the outer side of the second separation blade are provided with outer side protective layers, the inner sides of the first separation blade and the second separation blade are provided with inner side protective layers around the clamping space, a splashing protective space is formed between the outer side protective layers and the inner side protective layers, and a blade protective space is formed on the inner sides of the inner side protective layers. The blade is protected by the inner side protective layer, and the splashing generated by welding is prevented by the outer side protective layer and the inner side protective layer, so that the influence of the splashing on the blade is greatly reduced, and the quality of the blade after electron beam welding is improved.)

1. A splash guard assembly for electron beam welding of blades, comprising: a first blocking piece (10) and a second blocking piece (20) which are connected with each other;

the first baffle plate (10) sequentially comprises a first side surface (11), a second side surface (12), a third side surface (13) and a concave surface side (14);

the second baffle sheet (20) sequentially comprises a fourth side surface (21), a fifth side surface (22), a sixth side surface (23) and a convex surface side (24);

the concave side (14) is arranged opposite to the convex side (24) and forms a clamping space (30) for clamping the blade, and the first side (11) is arranged opposite to the fourth side (21);

a first baffle plate (41) and a second baffle plate (42) are respectively arranged at the positions, close to the first side surface (11) and the second side surface (12), of the top of the first baffle plate (10), and a third baffle plate (43) is arranged at the position, close to the concave surface side (14), of the top of the first baffle plate (10);

a fourth baffle plate (44) and a fifth baffle plate (45) are respectively arranged at the positions, close to the fourth side surface (21) and the fifth side surface (22), of the top of the second baffle plate (20), and a sixth baffle plate (46) is arranged at the position, close to the convex surface side (24), of the top of the second baffle plate (20);

the first baffle (41), the second baffle (42), the fourth baffle (44) and the fifth baffle (45) form an outer side protective layer, the third baffle (43) and the sixth baffle (46) form an inner side protective layer, a splash protection space is formed between the outer side protective layer and the inner side protective layer, and a blade protection space is formed on the inner side of the inner side protective layer.

2. The splash guard assembly for electron beam welding of blades according to claim 1, wherein the tops of the third and sixth baffles (43, 46) are flush.

3. The splash guard assembly for electron beam welding of blades according to claim 2, wherein the top of the first, second, fourth and fifth baffles (41, 42, 44, 45) are all flush with the top of the third and sixth baffles (43, 46).

4. The splash guard assembly for electron beam welding of blades according to claim 3, wherein the height of all baffles is higher than the top of the first and second flaps (10, 20).

5. The splash guard assembly for electron beam welding of blades according to claim 4, characterized in that the number of said third baffles (43) is 2,2 said third baffles (43) extending along said concave side (14) and being respectively adjacent to said first (11) and third (13) lateral surfaces.

6. The splash guard assembly for electron beam welding of blades according to any of claims 1 to 5, characterized in that the bottom of the two ends of the second blade (20) overlap the top of the two ends of the first blade (10), and the position where the second blade (20) overlaps the first blade (10) is connected by a screw (50).

7. The splash guard assembly for electron beam welding of blades according to claim 6, characterized in that the screw (50) protrudes from the bottom of the first blade (10) into the second blade (20).

8. The splash guard assembly for electron beam welding of blades according to claim 7, characterized in that the position where the second baffle (20) contacts the first baffle (10) is provided with an anti-melting groove (60).

9. A blade welding method based on the splash guard assembly for blade electron beam welding of any one of claims 1 to 8, characterized by comprising the following steps:

s1: cleaning areas to be welded of the casing and the blades in a wiping mode;

s2: sleeving a first blocking piece (10) and a second blocking piece (20) on the blade body of the blade and connecting the first blocking piece and the second blocking piece, so that the back of the blade edge plate is in contact with a third baffle (43) and a sixth baffle (46), and meanwhile, the welding joint at the outer edge of the blade edge plate is positioned in a splash protection space;

s3: clamping each part to be welded, enabling a casing welding joint to be in butt joint with a blade flange plate outer edge welding joint, and enabling the welding joint to be located in the vertical direction;

s4: welding the casing and the blades in an electron beam welding mode;

s5: and (3) disassembling the first baffle plate (10) and the second baffle plate (20) to finish the welding of the casing and the blade.

Technical Field

The invention relates to the technical field of welding of blades of an aircraft engine, in particular to a splash protection assembly for electron beam welding of blades and a blade welding method.

Background

In a certain type of aeroengine of production, 0 ~ 3 level stator subassembly is electron beam welded structure, and this part requirement uses electron beam welded connection to the blade of circumference 120 a plurality of blades on the quick-witted casket, and it does not have to splash on the requirement blade to weld the back, because electron beam welding produces and splashes the objective phenomenon of admittedly existing in the trade, protection and the post-weld processing of polishing when can only welding this, but because aeroengine blade surface state requires highly, and it can influence blade surface quality to polish.

Disclosure of Invention

The invention aims to provide a splash protection assembly for blade electron beam welding and a blade welding method, and aims to solve the problem that the surface quality of an existing aircraft engine blade is influenced when the blade is welded by an electron beam.

The technical scheme for solving the technical problems is as follows:

a splash guard assembly for electron beam welding of blades, comprising: the first blocking piece and the second blocking piece are connected with each other;

the first baffle plate sequentially comprises a first side surface, a second side surface, a third side surface and a concave surface side;

the second barrier sequentially comprises a fourth side surface, a fifth side surface, a sixth side surface and a convex surface side;

the concave side and the convex side are arranged oppositely to form a clamping space for clamping the blade, and the first side surface and the fourth side surface are arranged oppositely;

a first baffle plate and a second baffle plate are respectively arranged at the positions, close to the first side surface and the second side surface, of the top of the first baffle plate, and a third baffle plate is arranged at the position, close to the concave surface side, of the top of the first baffle plate;

a fourth baffle plate and a fifth baffle plate are respectively arranged at the positions, close to the fourth side surface and the fifth side surface, of the top of the second baffle plate, and a sixth baffle plate is arranged at the position, close to the convex surface side, of the top of the second baffle plate;

the first baffle, the second baffle, the fourth baffle and the fifth baffle form an outer side protective layer, the third baffle and the sixth baffle form an inner side protective layer, a splash protective space is formed between the outer side protective layer and the inner side protective layer, and a blade protective space is formed on the inner side of the inner side protective layer.

According to the invention, the clamping space is formed by the first baffle and the second baffle, the position of the blade close to the edge plate is clamped before welding, the edge plate is in contact with the third baffle and the sixth baffle, when the edge of the edge plate is welded with the casing, the blade is protected by the inner side protective layer formed by the third baffle and the sixth baffle, the splash generated by welding is positioned between the outer side protective layer and the inner side protective layer formed by the first baffle, the second baffle, the fourth baffle and the fifth baffle, and the splash protection is carried out through the outer side protective layer and the inner side protective layer, so that the influence of the splash on the blade is greatly reduced, and the quality of the blade after electron beam welding is improved.

Further, the tops of the third baffle and the sixth baffle are flush.

The tops of the third baffle and the sixth baffle are flush, so that the back surfaces of the edge plates of the blades can be in contact with the third baffle and the sixth baffle, and the splashing protection is effectively carried out.

Further, the tops of the first baffle, the second baffle, the fourth baffle and the fifth baffle are all flush with the tops of the third baffle and the sixth baffle.

Further, the heights of all the baffles are higher than the tops of the first baffle plate and the second baffle plate.

Further, the number of the third baffle plates is 2, and 2 third baffle plates extend along the concave surface side and are respectively close to the first side surface and the third side surface.

The number of the third baffle plates is 2, and the third baffle plates are respectively arranged at the positions close to the first side surface and the third side surface, so that the situation that the distance between the blade back and the edge plate is too small to be contacted with the third baffle plates can be avoided.

Furthermore, the bottoms of the two ends of the second blocking piece are overlapped with the tops of the two ends of the first blocking piece, and the overlapped position of the second blocking piece and the first blocking piece is connected through a screw.

The first blocking piece and the second blocking piece are connected in an overlapping mode, so that the connection efficiency between the first blocking piece and the second blocking piece can be improved, and meanwhile, the acting force direction of the first blocking piece and the second blocking piece is almost along the extension direction of the blade when the first blocking piece and the second blocking piece are installed and disassembled, so that the blade can be prevented from being collided or acted greatly.

Further, the screw extends into the second blocking piece from the bottom of the first blocking piece.

Furthermore, an anti-melting groove is arranged at the contact position of the second baffle and the first baffle.

The anti-melting groove is arranged on the path of the electron beam, so that the first blocking piece and the second blocking piece are prevented from being completely bonded together due to melting under the action of the electron beam, and the first blocking piece and the second blocking piece are convenient to detach due to the existence of the anti-melting groove.

A blade welding method based on the splash protection assembly for blade electron beam welding comprises the following steps:

s1: cleaning areas to be welded of the casing and the blades in a wiping mode;

s2: sleeving and connecting the first blocking piece and the second blocking piece on the blade body of the blade, so that the back surface of the blade edge plate is contacted with the third blocking piece and the sixth blocking piece, and meanwhile, the welding joint at the outer edge of the blade edge plate is positioned in the splash protection space;

s3: clamping each part to be welded, enabling a casing welding joint to be in butt joint with a blade flange plate outer edge welding joint, and enabling the welding joint to be located in the vertical direction;

s4: welding the casing and the blades in an electron beam welding mode;

s5: and disassembling the first separation blade and the second separation blade to complete the welding of the casing and the blade.

When the splash protection assembly is adopted to weld the blade by the electron beam, the splash protection assembly can effectively protect the blade, and in the whole welding process, the first blocking piece and the second blocking piece are easy to install and disassemble, so that even if the first blocking piece and the second blocking piece are fused and adhered together, the first blocking piece and the second blocking piece can not cause great influence on the surface of the blade when being disassembled.

The invention has the following beneficial effects:

(1) according to the invention, the clamping space is formed by the first baffle and the second baffle, the position of the blade close to the edge plate is clamped before welding, the edge plate is in contact with the third baffle and the sixth baffle, the blade is protected by the inner side protective layer when the edge of the edge plate is welded with the casing, the splash generated by welding is positioned between the outer side protective layer and the inner side protective layer, and the splash protection is carried out through the outer side protective layer and the inner side protective layer, so that the influence of the splash on the blade is greatly reduced, and the quality of the blade after electron beam welding is improved.

(2) The first blocking piece and the second blocking piece are connected in a lap joint mode, the anti-melting groove is formed in the path of the electron beam, the first blocking piece and the second blocking piece are prevented from being completely bonded together due to melting under the action of the electron beam, and the first blocking piece and the second blocking piece are convenient to detach due to the existence of the anti-melting groove.

(3) When the splash protection assembly is adopted to weld the blade by the electron beam, the splash protection assembly can effectively protect the blade, and in the whole welding process, the first blocking piece and the second blocking piece are easy to install and disassemble, so that even if the first blocking piece and the second blocking piece are fused and adhered together, the first blocking piece and the second blocking piece can not cause great influence on the surface of the blade when being disassembled.

Drawings

FIG. 1 is a top schematic view of a splash guard assembly for electron beam welding of blades in accordance with the present invention;

FIG. 2 is a bottom schematic view of the splash guard assembly for electron beam welding of blades in accordance with the present invention;

FIG. 3 is a schematic structural view of a first blocking sheet according to the present invention;

FIG. 4 is a schematic structural view of a second blocking sheet of the present invention;

FIG. 5 is a schematic structural view of the present invention when electron beam welding is performed using a splash guard assembly for electron beam welding of blades.

In the figure: 10-a first baffle plate; 11-a first side; 12-a second side; 13-a third side; 14-concave side; 20-a second baffle plate; 21-fourth side; 22-fifth side; 23-a sixth side; 24-convex side; 30-a clamping space; 41-a first baffle; 42-a second baffle; 43-a third baffle; 44-a fourth baffle; 45-fifth baffle; 46-a sixth baffle; 50-a screw; 60-an anti-melting groove; 70-blade.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Examples

Referring to fig. 1 and 2, a spatter shield assembly for electron beam welding of a blade includes: a first barrier 10 and a second barrier 20. After the first blocking piece 10 and the second blocking piece 20 are connected with each other, a clamping space 30 is formed for clamping at the back side of the edge plate of the aircraft engine blade 70, and a plurality of blocking plates are arranged on the first blocking piece 10 and the second blocking piece 20 for protecting the blade 70 and performing splash protection.

Referring to fig. 1 to 3, the first blocking plate 10 includes a first side 11, a second side 12, a third side 13 and a concave side 14 sequentially disposed. The top of the first blocking plate 10 is provided with a first baffle plate 41 and a second baffle plate 42 at positions close to the first side surface 11 and the second side surface 12 respectively. The concave side 14 is a concave side for contacting with the blade back of the blade 70, the third baffle 43 is disposed at the top of the first baffle plate 10 near the concave side 14, in this embodiment, the number of the third baffle 43 is 2,2 third baffle plates 43 are disposed along the concave side 14 and are respectively near the first side 11 and the third side 13, and by disposing 2 third baffle plates 43, it can be avoided that the distance between the blade edge plate and the blade back is too small to cause the third baffle plate 43 to be in effective contact with the blade edge plate. Obviously, in other embodiments of the present invention, the number of the third baffles 43 may also be 1.

Referring to fig. 1, 2 and 4, the second barrier 20 includes a fourth side surface 21, a fifth side surface 22, a sixth side surface 23 and a convex side surface 24, which are sequentially disposed. The top of the second flap 20 is provided with a fourth flap 44 and a fifth flap 45 at positions close to the fourth side 21 and the fifth side 22, respectively. The convex side 24 is a convex side for contacting the basin of the blade 70, and the top of the second flap 20 is provided with a sixth flap 46 adjacent the convex side 24.

Referring to fig. 1 to 4, the first barrier sheet 10 and the second barrier sheet 20 are connected in an overlapping manner, specifically, the bottoms of the two ends of the second barrier sheet 20 are respectively overlapped on the tops of the two ends of the first barrier sheet 10, that is, the fourth side surface 21 corresponds to the third side surface 13, and the sixth side surface 23 corresponds to the first side surface 11. The first blocking piece 10 and the second blocking piece 20 are connected at the overlapped position through the screw 50, the screw 50 extends into the second blocking piece 20 from the bottom of the first blocking piece 10, and when the screw 50 is screwed, the interference of the blade edge plate to the screw 50 can be avoided. In other embodiments of the present invention, the first barrier sheet 10 may also overlap on top of the second barrier sheet 20.

After the first barrier 10 and the second barrier 20 are connected, the first barrier 41, the second barrier 42, the fourth barrier 44, and the fifth barrier 45 form an outer protective layer, the third barrier 43 and the sixth barrier 46 form an inner protective layer, a splash protection space is formed between the outer protective layer and the inner protective layer, and a blade protection space is formed on the inner side of the inner protective layer. Meanwhile, the third baffle 43 and the sixth baffle 46 are flush and can be effectively contacted with the back surface of the blade edge plate. In the present embodiment, the top portions of the first baffle plate 41, the second baffle plate 42, the fourth baffle plate 44 and the fifth baffle plate 45 are all flush with the top portions of the third baffle plate 43 and the sixth baffle plate 46, while the height of all baffle plates is higher than the top portions of the first shutter plate 10 and the second shutter plate 20.

When electron beam welding is carried out, metal on an electron beam path can be melted, in order to avoid that the first blocking piece 10 and the second blocking piece 20 are all melted and adhered at the overlapped position, the first blocking piece 10 and the second blocking piece 20 are provided with the anti-melting groove 60 at the overlapped position, and at the position of the anti-melting groove 60, the first blocking piece 10 and the second blocking piece 20 can not be adhered, so that the first blocking piece 10 and the second blocking piece 20 can be conveniently separated. In this embodiment, the anti-melting groove 60 is disposed at the bottom of the second shutter 20, and obviously, in other embodiments of the present invention, the anti-melting groove 60 may also be disposed at the top of the first shutter 10.

The first baffle plate 10 and the second baffle plate 20 are connected in an overlapping mode, the contact area between the first baffle plate 10 and the second baffle plate 20 is small, the bonding area between the first baffle plate 10 and the second baffle plate 20 is small when electron beam welding is carried out, separation is convenient, the direction of force applied to the first baffle plate 10 and the second baffle plate 20 is almost consistent with the extending direction of the blades when the first baffle plate and the second baffle plate are separated, the blades 70 are prevented from being impacted or excessively extruded in the separation process, and the surface quality of the blades 70 is ensured. Meanwhile, in order to separate the first barrier piece 10 from the second barrier piece 20, the anti-melting groove 60 is arranged at the overlapped position, so that the first barrier piece 10 and the second barrier piece 20 are prevented from being bonded together through melting, the area for melting bonding can be reduced, and the first barrier piece 10 and the second barrier piece 20 can be detached through the anti-melting groove 60, so that the detachment is more convenient.

Referring to fig. 5, a blade welding method based on the above-mentioned splash guard assembly for blade electron beam welding includes the following steps:

s1: wiping areas to be welded of the casing and the blades (the areas to be welded of the blades are the outer edges of the blade flanges) by using wiping cloth dipped with acetone, and cleaning the areas to be welded of the casing and the blades;

s2: sleeving the first baffle plate 10 and the second baffle plate 20 on the blade body of the blade and connecting the first baffle plate and the second baffle plate, so that the back surface of the blade edge plate is in contact with the third baffle plate 43 and the sixth baffle plate 46, and meanwhile, the welding joint at the outer edge of the blade edge plate is positioned in the splash protection space;

s3: clamping each part to be welded, enabling a casing welding joint to be in butt joint with a blade flange plate outer edge welding joint, and enabling the welding joint to be located in the vertical direction (the position to be welded is annular, and the annular position to be welded is located in the horizontal direction, namely the welding joint is located in the vertical direction);

s4: welding the casing and the blades by adopting a conventional electron beam welding mode;

s5: and (5) disassembling the first baffle plate 10 and the second baffle plate 20 to complete the welding of the casing and the blade.

When welding, the blade is protected in the blade protection space formed on the inner side of the inner side protective layer, and splashing generated by welding is blocked in the splashing protection space formed between the outer side protective layer and the inner side protective layer, so that the influence of splashing on the blade is greatly reduced, and the quality of the blade after electron beam welding is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.