Vacuum arc brazing clamp for aircraft engine blade

Abstract

The utility model relates to the field of aero-engine manufacturing, in particular to an aero-engine blade vacuum arc brazing clamp which comprises a chuck body, a limiting device and a clamping device, the chuck body is in a circular ring shape, a plurality of grooves are formed in the outer side face of the chuck body at intervals in the circumferential direction of the chuck body, and the limiting device is connected with the clamping device. The limiting device is fixedly connected with the chuck body, and the clamping device is rotationally connected with the chuck body. The chuck body is arranged to be annular, the center hole of the chuck body is conveniently connected with the shaft of the vacuum arc brazing equipment, the grooves are formed in the chuck body and used for containing the to-be-machined blades, the to-be-machined blades are limited through the limiting device, and the to-be-machined blades are clamped and fixed through the clamping device. Therefore, a large number of vacuum brazing wear-resistant layer blades can be conveniently and rapidly clamped and machined at a time, the machining efficiency is improved, the machining stability is enhanced, and the machining quality is further improved.

Description

Technical Field

[0001] This utility model relates to the field of aero-engine manufacturing, specifically to a vacuum arc brazing fixture for aero-engine blades. Background Technology

[0002] During engine operation, turbine blades in aero engines experience friction between their contact surfaces. To improve blade lifespan, a wear-resistant layer is typically welded to the meshing surfaces of the blade contact surfaces. Some blades require a strict welding environment, necessitating welding in a vacuum furnace. Conventional fixtures can braze several blades at a time, and the repeated switching of the vacuum furnace and extraction of the vacuum environment consumes a significant amount of time, impacting processing efficiency and quality. Utility Model Content

[0003] The technical problem to be solved by this invention is how to improve the processing efficiency of the wear-resistant layer of brazed blades.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A vacuum arc brazing fixture for aero-engine blades includes: a chuck body, a limiting device and a clamping device. The chuck body is annular, and multiple grooves are provided at intervals along its circumference on the outer side of the chuck body. The limiting device is fixedly connected to the chuck body, and the clamping device is rotatably connected to the chuck body.

[0005] The beneficial effects of this utility model are as follows: by setting the chuck body as a ring, its central hole can be easily connected to the shaft of the vacuum arc brazing equipment. Multiple grooves are set on the chuck body for placing the blades to be processed. The blades to be processed are limited by a limiting device and clamped and fixed by a clamping device. This allows for convenient and quick clamping and processing of a large number of vacuum brazed wear-resistant blades at one time, improving processing efficiency, enhancing processing stability, and further improving processing quality.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the limiting device includes a limiting ring, which is disposed on one side of the clamping plate body and fixedly connected to the clamping plate body.

[0008] The beneficial effect of adopting the above-mentioned further solution is that by setting a limiting ring on one side of the clamping plate body, the limiting ring abuts and limits the blade when it is placed into the groove.

[0009] Furthermore, the limiting device also includes a first locking pin and a first locking screw. The clamp body is provided with a first connecting hole and a first pin hole, and the limiting ring is provided with a second connecting hole and a second pin hole. The first locking pin passes through the second pin hole and the first pin hole, and the first locking screw passes through the second connecting hole and is connected to the first connecting hole.

[0010] The beneficial effects of adopting the above-mentioned further solution are: by setting a first connecting hole and a first pin hole on the chuck body, and correspondingly setting a second connecting hole and a second pin hole on the limiting ring, and fixing the limiting ring and the chuck body by the first locking pin and the first locking screw, the blade can be stably limited during blade processing, ensuring smooth processing operations.

[0011] Furthermore, there are multiple first connecting holes and multiple first pin holes.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by setting multiple first connecting holes and multiple first pin holes, the connection between the limiting ring and the clamping plate body is made more stable.

[0013] Furthermore, the clamping device includes a screw and a clamping assembly. The screw has a tapered sidewall and a first through hole at the bottom of the groove. The chuck body has a first screwing hole. One end of the first through hole communicates with the screwing hole. The screw is disposed in the screwing hole. One end of the clamping assembly passes through the first through hole and abuts against the sidewall of the screw.

[0014] The beneficial effect of adopting the above-mentioned further solution is that by setting a screw and a clamping assembly, after the blade is installed in the groove, the screw and the clamping assembly cooperate with each other to tighten and fix the bottom of the blade.

[0015] Furthermore, the clamping assembly includes a clamping pin and a pressure block. The clamping pin passes through the first through hole, one end of the clamping pin abuts against the screw, and the other end of the clamping pin is connected to the pressure block.

[0016] The beneficial effect of adopting the above-mentioned further solution is that by rotating the screw, the clamping pin is pushed by the conical surface of the screw and moves toward the pressure block. Then the clamping pin lifts the pressure block and abuts against the bottom of the blade. With further rotation of the screw, the pressure block will press the bottom of the blade to fix the blade.

[0017] Furthermore, the clamping assembly also includes a second fixing screw, and one end of the clamping block is connected to the clamping plate body through the second fixing screw.

[0018] The beneficial effect of adopting the above-mentioned further solution is that by setting a second fixing screw, the pressure block is fixed to the clamping plate body, so as to prevent the pressure block from falling out when the blade is not placed in the groove.

[0019] Furthermore, the first through hole and the first screw hole are perpendicular.

[0020] The beneficial effect of adopting the above-mentioned further solution is that setting the first through hole and the first screw hole to be perpendicular allows the clamping pin to have a larger displacement when the screw is rotated, which in turn makes clamping the blade more time-saving and labor-saving.

[0021] Furthermore, one end of the first screwing hole is provided with an internal thread, one end of the screwing screw is provided with an external thread, one end of the screwing screw has a diameter larger than the other end of the screwing screw, and the middle part of the screwing screw has the conical surface.

[0022] The beneficial effects of adopting the above-mentioned further solution are: by setting an internal thread at one end of the first screwing hole and an external thread at one end of the screwing screw, the two work together more conveniently; by making the diameter of one end of the screwing screw larger than the diameter of the other end of the screwing screw, a conical surface is formed in the middle of the screwing screw, so that when the screw is screwed, the clamping pin and the conical surface abut against each other, thereby driving the clamping pin to move and push the pressure block to clamp the blade.

[0023] Furthermore, there are 40 grooves.

[0024] The beneficial effects of adopting the above-mentioned further solution are: by setting 40 grooves at intervals along the circumference on the outer side of the clamping plate body, 40 blades can be clamped at one time and processed with vacuum brazing wear-resistant layer, while reducing the time for switching on and off the vacuum furnace and extracting the vacuum environment, effectively improving the processing efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a vacuum arc brazing fixture for aircraft engine blades according to the present invention.

[0026] Figure 2 This is a front view of a vacuum arc brazing fixture for aero-engine blades according to the present invention.

[0027] Figure 3 This is a side view of a vacuum arc brazing fixture for aero-engine blades according to the present invention.

[0028] Figure 4 This is an HH cross-sectional view of a vacuum arc brazing fixture for aero-engine blades according to this utility model;

[0029] Figure 5 This is an enlarged view of the groove of a vacuum arc brazing fixture for aero-engine blades according to this utility model.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Top clamping pin; 2. Clamping disc body; 3. Pressure block; 4. Second fixing screw; 5. Tightening screw; 6. Limiting ring; 7. First locking screw; 8. First locking pin; 9. Electrode; 10. Groove; 100. Blade. Detailed Implementation

[0032] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0033] like Figures 1-5 As shown, this embodiment provides a vacuum arc brazing fixture for aero-engine blades, including: a chuck body 2, a limiting device and a clamping device. The chuck body 2 is annular, and a plurality of grooves 10 are provided at intervals along its circumference on the outer surface of the chuck body 2. The limiting device is fixedly connected to the chuck body 2, and the clamping device is rotatably connected to the chuck body 2.

[0034] By setting the chuck body 2 as a ring, its central hole facilitates connection with the shaft of the vacuum arc brazing equipment. Multiple grooves 10 are set on the chuck body 2 for placing the blades 100 to be processed. The blades 100 to be processed are limited by a limiting device and clamped and fixed by a clamping device. This allows for convenient and quick clamping and processing of a large number of vacuum brazed wear-resistant blades 100 at one time, improving processing efficiency and enhancing the stability of processing quality.

[0035] Specifically, the material of the clamp body 2 is copper.

[0036] Based on any of the above solutions, the limiting device includes a limiting ring 6, which is disposed on one side of the clamping plate body 2 and fixedly connected to the clamping plate body 2.

[0037] By setting a limiting ring 6 on one side of the clamp body 2, the limiting ring 6 abuts and limits the blade 100 when it is placed into the groove 10.

[0038] Based on any of the above solutions, the limiting device further includes a first locking pin 8 and a first locking screw 7. The clamping plate body 2 is provided with a first connecting hole and a first pin hole. The limiting ring 6 is provided with a second connecting hole and a second pin hole. The first locking pin 8 passes through the second pin hole and the first pin hole. The first locking screw 7 passes through the second connecting hole and is connected to the first connecting hole.

[0039] Specifically, the first connecting hole is a through hole, and the second connecting hole is a through hole.

[0040] By providing a first connecting hole and a first pin hole on the chuck body 2, and correspondingly providing a second connecting hole and a second pin hole on the limiting ring 6, and fixing the limiting ring 6 and the chuck body 2 by the first locking pin 8 and the first locking screw 7, the blade 100 can be stably limited during processing, ensuring smooth processing.

[0041] Based on any of the above solutions, there are multiple first connecting holes and multiple first pin holes.

[0042] By setting multiple first connecting holes and multiple first pin holes, the connection between the limiting ring 6 and the clamp body 2 is made more stable.

[0043] Specifically, the first connecting holes are spaced apart circumferentially on the radial surface of the clamp body 2, the first pin holes are spaced apart circumferentially on the radial surface of the clamp body 2, and correspondingly, the second connecting holes are spaced apart circumferentially on the limiting ring 6, and the second pin holes are spaced apart circumferentially on the limiting ring 6.

[0044] In a specific example, there are 8 first connecting holes and 2 first pin holes, and correspondingly 8 second connecting holes and 2 second pin holes. The two first locking pins 8 are symmetrically arranged relative to the center of the clamp body 2. When assembling the fixture, the limiting ring 6 is first positioned by passing the two first locking pins 8 through the second pin holes and the first pin holes respectively. Then, the limiting ring 6 and the clamp body 2 are locked and fixed by the eight first locking screws 7, thereby stabilizing the limiting ring 6. This allows for accurate and stable positioning when clamping the blade 100 and smooth subsequent processing of the blade 100.

[0045] Based on any of the above solutions, the clamping device includes a screw 5 and a clamping assembly. The screw 5 has a tapered sidewall and a first through hole is provided at the bottom of the groove 10. The chuck body 2 is provided with a first screw hole. One end of the first through hole communicates with the first screw hole. The screw 5 is disposed in the first screw hole. One end of the clamping assembly passes through the first through hole and abuts against the sidewall of the screw 5.

[0046] By setting the screw 5 and the clamping assembly, after the blade 100 is installed in the groove 10, the screw 5 and the clamping assembly cooperate with each other. That is, when the screw 5 is screwed in, the clamping assembly is pushed by the conical surface of the screw 5 and moves towards the groove 10, which can press and fix the bottom of the blade 100. After the blade 100 is processed, the screw 5 is screwed out, the clamping assembly and the bottom of the blade 100 are separated, and then the blade 100 is taken out.

[0047] Optionally, the screw 5 and the first screw hole are slidably connected, or the screw 5 and the first screw hole are threadedly connected.

[0048] Based on any of the above solutions, the clamping assembly includes a clamping pin 1 and a pressure block 3. The clamping pin 1 passes through the first through hole, one end of the clamping pin 1 abuts against the screw 5, and the other end of the clamping pin 1 is connected to the pressure block 3.

[0049] By screwing in the screw 5, the clamping pin 1 is pushed by the conical surface of the screw 5 and moves towards the pressure block 3. The clamping pin 1 then lifts the pressure block 3 and abuts against the bottom of the blade 100. As the screw 5 is further rotated, the pressure block 3 will press the bottom of the blade 100 to fix the blade 100. By unscrewing the screw 5, the clamping pin 1 will move with the conical surface to separate the pressure block 3 from the bottom of the blade 100, thereby loosening the blade 100 and making it easier to remove the processed blade 100.

[0050] Specifically, the clamping pin 1 and the pressure block 3 are fixedly connected, or the clamping pin 1 and the pressure block 3 abut against each other.

[0051] Specifically, block 3 is a copper sheet.

[0052] Based on any of the above solutions, the clamping assembly further includes a second fixing screw 4, and one end of the pressure block 3 is connected to the clamping plate body 2 through the second fixing screw 4.

[0053] By setting the second fixing screw 4, the pressure block 3 is fixed to the clamping plate body 2, so as to prevent the pressure block 3 from falling out when the blade 100 is not placed in the groove 10.

[0054] Specifically, the other end of the pressure block 3 can rotate at a small angle along the axis of the second fixing screw 4.

[0055] In a specific example, such as Figure 3 As shown, the second fixing screw 4 does not completely fix the pressure block 3 and the clamp body 2. There is a certain gap between one end of the pressure block 3 and the bottom wall of the groove 10. When the top clamping pin 1 moves towards the blade 100, the top clamping pin 1 will lift the other end of the pressure block 3 and abut against the bottom of the blade 100, thereby tightening and fixing the blade 100.

[0056] Based on any of the above schemes, the first through hole and the first screw hole are perpendicular.

[0057] Setting the first through hole and the first screw hole to be perpendicular allows the clamping pin 1 to have a larger displacement when the screw 5 is rotated, which in turn makes clamping the blade 100 more time-saving and labor-saving.

[0058] Based on any of the above solutions, one end of the first screwing hole is provided with an internal thread, one end of the screw 5 is provided with an external thread, the diameter of one end of the screw 5 is larger than the diameter of the other end of the screw 5, and the screw 5 has a conical surface in the middle. By providing an internal thread at one end of the first screwing hole and an external thread at one end of the screw 5, the two work together more conveniently. By making the diameter of one end of the screw 5 larger than the diameter of the other end of the screw 5, a conical surface is formed in the middle of the screw 5, so that when the screw 5 is screwed, the clamping pin 1 abuts against the conical surface, thereby causing the clamping pin 1 to generate displacement and push the pressure block 3 to clamp the blade 100.

[0059] Based on any of the above schemes, the number of grooves 10 is 40.

[0060] By setting 40 grooves 10 at intervals along the circumference on the outer side of the clamping plate body 2, 40 blades 100 can be clamped at one time and processed with vacuum brazing wear-resistant layer, while reducing the time for switching on and off the vacuum furnace and extracting the vacuum environment, effectively improving processing efficiency.

[0061] In one specific example, the steps for vacuum arc brazing blade 100 are as follows:

[0062] S1. Place the entire fixture into the vacuum arc brazing equipment and connect the center hole of the clamp body 2 to the rotating shaft in the vacuum arc brazing equipment.

[0063] S2. Place the blade 100 into the groove 10 of the chuck body 2 and slide the blade 100 so that it abuts against the limiting ring 6.

[0064] S3. Screw in the screw 5 and push the top pin 1 to abut and tighten it against the bottom of the blade 100, thereby fixing the blade 100.

[0065] S4. Repeat steps S2 and S3 to clamp all 100 blades to be processed.

[0066] S5. Adjust the electrode 9 of the vacuum arc brazing equipment to a suitable position, cover the equipment, start the vacuum arc brazing equipment, the chuck body 2 rotates around the rotating axis, the electrode 9 is connected to the high voltage to release the arc, and then the blade crown processing part of the blade 100 on the chuck body 2 is vacuum arc brazed.

[0067] This fixture can clamp and process multiple blades 100 at once. Compared with the conventional fixtures that braze one or several blades 100 at a time, it saves the time of repeatedly opening and closing the vacuum furnace and extracting the vacuum environment, thus improving processing efficiency. The blades 100 are limited by the limiting ring 6, and the blades 100 are clamped and fixed by screwing in the screw 5, which pushes the top pin 1 and the pressure block 3. This makes the blades 100 more stable during processing, ensures the smooth progress of processing, and improves the processing quality of the blades 100.

[0068] In the description of this utility model, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0071] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A vacuum arc brazing fixture for aero-engine blades, characterized in that, include: The clamping plate body (2), the limiting device and the clamping device are provided. The clamping plate body (2) is circular. Multiple grooves (10) are provided at intervals along its circumference on the outer side surface of the clamping plate body (2). The limiting device is fixedly connected to the clamping plate body (2), and the clamping device is rotatably connected to the clamping plate body (2).

2. The vacuum arc brazing fixture for aero-engine blades according to claim 1, characterized in that, The limiting device includes a limiting ring (6), which is disposed on one side of the clamp body (2) and fixedly connected to the clamp body (2).

3. The vacuum arc brazing fixture for aero-engine blades according to claim 2, characterized in that, The limiting device further includes a first locking pin (8) and a first locking screw (7). The clamp body (2) is provided with a first connecting hole and a first pin hole. The limiting ring (6) is provided with a second connecting hole and a second pin hole. The first locking pin (8) passes through the second pin hole and the first pin hole. The first locking screw (7) passes through the second connecting hole and is connected to the first connecting hole.

4. The vacuum arc brazing fixture for aero-engine blades according to claim 3, characterized in that, There are multiple first connecting holes and multiple first pin holes.

5. The vacuum arc brazing fixture for aero-engine blades according to claim 1, characterized in that, The clamping device includes a screw (5) and a clamping assembly. The screw (5) has a tapered sidewall and a first through hole at the bottom of the groove (10). The chuck body (2) has a first screw hole. One end of the first through hole communicates with the first screw hole. The screw (5) is located in the first screw hole. One end of the clamping assembly passes through the first through hole and abuts against the sidewall of the screw (5).

6. The vacuum arc brazing fixture for aero-engine blades according to claim 5, characterized in that, The clamping assembly includes a clamping pin (1) and a pressure block (3). The clamping pin (1) is inserted into the first through hole. One end of the clamping pin (1) abuts against the screw (5), and the other end of the clamping pin (1) is connected to the pressure block (3).

7. The vacuum arc brazing fixture for aero-engine blades according to claim 6, characterized in that, The clamping assembly also includes a second fixing screw (4), and one end of the clamping block (3) is connected to the clamping plate body (2) through the second fixing screw (4).

8. The vacuum arc brazing fixture for aero-engine blades according to claim 6, characterized in that, The first through hole and the first screw hole are perpendicular.

9. A vacuum arc brazing fixture for aero-engine blades according to any one of claims 5-8, characterized in that, One end of the first screw hole is provided with an internal thread, and one end of the screw (5) is provided with an external thread. The diameter of one end of the screw (5) is larger than the diameter of the other end of the screw (5), and the middle part of the screw (5) has the conical surface.

10. The vacuum arc brazing fixture for aero-engine blades according to claim 1, characterized in that, The groove (10) has 40 grooves.

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