Aero-engine blade welding clamp

Abstract

The utility model relates to blade manufacturing technical field especially relates to a kind of aeroengine blade welding fixture, including basin orientation positioning seat and back orientation positioning seat, the first end of basin orientation positioning seat and the first end of back orientation positioning seat are hinged, the second end of basin orientation positioning seat and the second end of back orientation positioning seat are connected by distance adjusting mechanism;Second end on basin orientation positioning seat and the first end on back orientation positioning seat are fixed with linear movement mechanism, the output end of two linear movement mechanisms is oppositely arranged, and the output end of linear movement mechanism is installed with pressure block, under the driving of two linear movement mechanisms, the pressure block on two linear movement mechanisms is mutually close or far away from each other.The beneficial effects of the utility model are: realize the clamping of blade blade body, effectively reduce the volume of clamp;Realize the positioning of wear block;Compact and light structure, compact and stable and reliable, satisfy the use requirement in vacuum arc brazing equipment.

Description

Technical Field

[0001] This utility model relates to the field of blade manufacturing technology, and in particular to a welding fixture for aero-engine blades. Background Technology

[0002] During engine operation, turbine blades generate friction between their contact points. A wear-resistant block is typically welded to the meshing surface of the blade contact points to increase wear resistance and extend blade life. Currently, the welding process for turbine blade wear-resistant blocks uses argon arc welding, where the wear-resistant layer is built up using welding wire. This results in inconsistent weld quality and a tendency for the weld surface to collapse, reducing product quality. Vacuum arc brazing is a welding process performed in a vacuum environment, offering high weld quality and improved corrosion resistance. However, welding in a vacuum environment requires clamping and positioning the blades and wear-resistant plates before welding. This clamping needs to be compact and provide stable and reliable clamping, and current technology lacks specialized clamps for vacuum arc brazing of blades and wear-resistant plates. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a welding fixture for aero-engine blades, which overcomes the shortcomings of the existing technology.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A welding fixture for aero-engine blades includes a basin-oriented positioning seat and a back-oriented positioning seat. The first end of the basin-oriented positioning seat and the first end of the back-oriented positioning seat are hinged together. The second end of the basin-oriented positioning seat and the second end of the back-oriented positioning seat are connected by a distance adjustment mechanism to adjust the distance between the second end of the basin-oriented positioning seat and the second end of the back-oriented positioning seat. A linear moving mechanism is fixed on the second end of the basin-oriented positioning seat and the first end of the back-oriented positioning seat. The output ends of the two linear moving mechanisms are arranged facing each other, and a clamping block is installed on the output end of the linear moving mechanism. Under the drive of the two linear moving mechanisms, the clamping blocks on the two linear moving mechanisms move closer to each other or further away from each other.

[0005] The beneficial effects of this utility model are as follows: the basin-oriented positioning seat and the back-oriented positioning seat are connected by a hinge, allowing the basin-oriented positioning seat and the back-oriented positioning seat to clamp the blade body at the welding surface. By adjusting the distance adjustment structure, the clamping of the blade body is achieved, effectively reducing the volume of the fixture; the linear movement mechanism drives the movement of the clamping block, which can effectively press the wear-resistant block against the surface to be welded, achieving the positioning of the wear-resistant block; the structure is compact and lightweight, and the clamping is stable and reliable, meeting the requirements for use in vacuum arc brazing equipment.

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

[0007] Furthermore, the distance adjustment mechanism includes a knurled head screw, the screw end of which slides through the back-facing positioning seat and is threadedly connected to the basin-facing positioning seat; or, the screw end of the knurled head screw slides through the basin-facing positioning seat and is threadedly connected to the back-facing positioning seat.

[0008] The beneficial effects of adopting the above-mentioned further solution are: the specific adjustment structure uses a knurled head screw, and the distance between the first end facing away from the positioning seat and the second end facing the positioning seat can be easily adjusted by turning the head of the knurled head screw. The operation is simple and the adjustment is convenient.

[0009] Furthermore, the clamping block is hinged to the output end of the linear motion mechanism via a pin.

[0010] The beneficial effect of adopting the above-mentioned further solution is that the clamping block and the output end of the linear motion mechanism are connected by a hinge. During the process of the clamping block applying pressure to the wear-resistant block, the clamping block can rotate according to the force requirements to ensure that the wear-resistant block can be firmly pressed against the blade crown.

[0011] Furthermore, the linear movement mechanism includes a movable seat, which is fixed on the basin-oriented positioning seat or the back-oriented positioning seat. A slider is slidably provided inside the movable seat. One end of the slider extends from the movable seat toward the other movable seat and is connected to the clamping block. A slider drive is provided on the movable seat. The slider drive is connected to the slider and is used to drive the slider to move closer to or away from the other movable seat.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the slider drive drives the slider to move, thereby driving the clamping block to move, so that the clamping block can press against the wear-resistant block and press the wear-resistant block against the blade crown.

[0013] Furthermore, the slider drive includes a clamping screw, which is threadedly connected to the movable seat and rotatably connected to the end of the slider away from the clamping block.

[0014] The advantages of adopting the above-mentioned further solution are: the slider drive uses a clamping screw, which has a simple and compact structure and allows for easy adjustment of the slider's moving position.

[0015] Furthermore, the end of the slider away from the clamping block is provided with a T-shaped groove, and one end of the clamping screw is provided with a T-shaped structure that matches the T-shaped groove. The T-shaped structure is rotatably disposed within the T-shaped groove.

[0016] The beneficial effects of adopting the above-mentioned further solution are: the T-shaped structure is rotated in the T-shaped groove, which prevents the slider from separating from the clamping block, and the rotation of the clamping screw will not drive the slider and the clamping block to rotate. The rotation of the clamping block during the process of pressing the wear-resistant block will affect the clamping effect and the positioning effect.

[0017] Furthermore, a positioning ball pin is fixedly provided on the side of the basin-facing positioning seat and / or the back-facing positioning seat where the moving mechanism is located.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the positioning ball pin can abut and position the end face of the blade body that connects the blade crown to the blade, ensuring the accurate positioning of the wear-resistant block and the blade crown.

[0019] Furthermore, both the basin-oriented positioning seat and the back-oriented positioning seat are provided with hollow holes.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the setting of the perforated hole can reduce the weight of the basin-side positioning seat and the back-side positioning seat.

[0021] Furthermore, the side of the basin-oriented positioning seat facing the back-oriented positioning seat is an outwardly convex outer curved surface, and the side of the back-oriented positioning seat facing the basin-oriented positioning seat is an inwardly concave inner curved surface.

[0022] The beneficial effects of adopting the above-mentioned further solution are: the outer curved surface and the inner curved surface can match the shape of the two sides of the blade, increase the clamping area of ​​the blade during the clamping process, ensure the stability of the clamping, and at the same time avoid damage to the blade.

[0023] Furthermore, the end face of the clamping block away from the linear movement mechanism includes a first clamping surface and a second clamping surface, which are arranged at an angle.

[0024] The beneficial effect of adopting the above-mentioned further solution is that the first clamping surface and the second clamping surface on the clamping block can press against the two adjacent sides of the wear-resistant block, which facilitates the positioning of the wear-resistant block. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is the front view of the present invention;

[0027] Figure 3 This is a top view of the present invention;

[0028] Figure 4 This is the left view of the present invention;

[0029] Figure 5 This utility model Figure 2 Sectional view of plane AA in the middle;

[0030] Figure 6 This is a schematic diagram showing the state of the present invention in use;

[0031] Figure 7 This is a top view of the present invention in use;

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Pan-facing positioning seat; 2. Back-facing positioning seat; 3. Clamping block; 4. Knurled high-head screw; 5. Pin; 6. Moving seat; 7. Slider; 8. Clamping screw; 9. T-slot; 10. T-shaped structure; 11. Positioning ball pin; 12. Hollow hole; 13. Outer curved surface; 14. Inner curved surface; 15. First clamping surface; 16. Second clamping surface; 17. Blade; 18. Blade crown; 19. Cover plate; 20. Wear-resistant block; 21. Fixing screw; 22. Rotating pin. Detailed Implementation

[0034] 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.

[0035] like Figures 1 to 4 As shown, the embodiment of this utility model includes a basin-oriented positioning seat 1 and a back-oriented positioning seat 2. Both the basin-oriented positioning seat 1 and the back-oriented positioning seat 2 are provided with hollow holes 12. The hollow holes 12 are arranged on the opposite sides of the basin-oriented positioning seat 1 and the back-oriented positioning seat 2, so that the hollow holes 12 on the basin-oriented positioning seat 1 and the back-oriented positioning seat 2 are arranged opposite to each other, so that the basin-oriented positioning seat 1 and the back-oriented positioning seat 2 form a frame structure, which can greatly reduce the weight of the basin-oriented positioning seat 1 and the back-oriented positioning seat 2.

[0036] The first end of the basin-facing positioning seat 1 and the first end of the opposite-facing positioning seat 2 are hinged together, specifically, as shown in the figure. Figure 4 As shown, a groove is provided in the middle of the first end of the basin-facing positioning seat 1, and a protrusion is provided in the middle of the first end of the opposite-facing positioning seat 2. The protrusion is located in the groove, and one end of the rotating pin 22 passes through the side wall of the groove and the protrusion in sequence. The rotating pin 22 is rotatably connected to the side wall of the groove and the protrusion.

[0037] The second end of the basin-oriented positioning seat 1 and the second end of the back-oriented positioning seat 2 are connected by a distance adjustment mechanism to adjust the distance between the second end of the basin-oriented positioning seat 1 and the second end of the back-oriented positioning seat 2. A linear moving mechanism is fixed on the second end of the basin-oriented positioning seat 1 and the first end of the back-oriented positioning seat 2. The output ends of the two linear moving mechanisms are arranged facing each other, and a clamping block 3 is installed on the output end of the linear moving mechanism. Under the drive of the two linear moving mechanisms, the clamping blocks 3 on the two linear moving mechanisms move closer to each other or further away from each other.

[0038] The distance adjustment mechanism includes a knurled head screw 4, the screw end of which slides through the back-facing positioning seat 2 and is threadedly connected to the basin-facing positioning seat 1; or, the screw end of the knurled head screw 4 slides through the basin-facing positioning seat 1 and is threadedly connected to the back-facing positioning seat 2.

[0039] In an embodiment of this utility model, when the screw end of the knurled head screw 4 slides through the back-facing positioning seat 2 and is threadedly connected to the basin-facing positioning seat 1, the back-facing positioning seat 2 is provided with a through hole for the screw end of the knurled head screw 4 to pass through. The inner diameter of the through hole is larger than the outer diameter of the screw of the knurled head screw 4 and smaller than the diameter of the head of the knurled head screw 4, so that the screw of the knurled head screw 4 can deflect to a certain extent in the through hole. Furthermore, the knurled head screw 4 is installed after the back-facing positioning seat 2 and the basin-facing positioning seat 1 contact the blade, thus avoiding interference when the distance between the knurled head screw 4 and the basin-facing positioning seat 1 is adjusted after the back-facing positioning seat 2 is adjusted. When the screw end of the knurled head screw 4 slides through the basin-oriented positioning seat 1 and is threadedly connected to the back-oriented positioning seat 2, the basin-oriented positioning seat 1 has a through hole for the screw end of the knurled head screw 4 to pass through. The inner diameter of the through hole is larger than the outer diameter of the screw of the knurled head screw 4 and smaller than the diameter of the head of the knurled head screw 4, so that the screw of the knurled head screw 4 can deflect to a certain extent in the through hole. The knurled head screw 4 is installed after the back-oriented positioning seat 2 and the basin-oriented positioning seat 1 contact the blade, so as to avoid interference when the distance between the knurled head screw 4 and the basin-oriented positioning seat 1 is adjusted after the back-oriented positioning seat 2 is adjusted.

[0040] In an embodiment of this utility model, the clamping block 3 is hinged to the output end of the linear motion mechanism via a pin 5. The clamping block 3 and the output end of the linear motion mechanism are connected by a hinge. During the process of the clamping block 3 applying pressure to the wear-resistant block 20, the clamping block 3 can rotate according to the force requirements to ensure that the wear-resistant block 20 can be firmly pressed against the crown 18 of the blade 17.

[0041] The linear movement mechanism includes a movable base 6, which is fixed to the basin-facing positioning base 1 or the back-facing positioning base 2. A slider 7 is slidably disposed within the movable base 6. One end of the slider 7 extends from the movable base 6 toward the other movable base 6 and is connected to the clamping block 3. A slider 7 driving component is provided on the movable base 6. The slider 7 driving component is connected to the slider 7 and is used to drive the slider 7 to move closer to or away from the other movable base 6. The slider 7 driving component includes a clamping screw 8, which is threadedly connected to the movable base 6 and rotatably connected to the end of the slider 7 away from the clamping block 3. The slider 7 driving component drives the slider 7 to move, thereby driving the clamping block 3 to move, so that the clamping block 3 can press against the wear-resistant block 20, pressing the wear-resistant block 20 against the blade crown 18 of the blade 17. The slider 7 driving component uses a clamping screw 8, which has a simple and compact structure and allows for easy adjustment of the slider 7's position.

[0042] In other embodiments of this utility model, the linear movement mechanism may also be a linear motor or a cylinder to achieve linear movement of the clamping block 3.

[0043] like Figure 5 As shown in the embodiment of this utility model, the end of the slider 7 away from the clamping block 3 is provided with a T-shaped groove 9, and one end of the clamping screw 8 is provided with a T-shaped structure 10 that matches the T-shaped groove 9. The T-shaped structure 10 is rotatably disposed within the T-shaped groove 9. Specifically, the T-shaped groove 9 extends to both sides of the slider 7, and the front end of the T-shaped structure 10 is a cylindrical structure so that the T-shaped structure 10 can rotate within the T-shaped groove 9.

[0044] like Figure 5 As shown, the T-shaped structure 10 can move a certain distance along the axial direction of the clamping screw 8 within the T-shaped groove 9, that is, the thickness of the cylindrical structure is less than the depth of the inner groove of the T-shaped groove 9, so as to facilitate the sliding of the T-shaped structure 10 into the T-shaped groove 9 during installation.

[0045] The movable base 6 has a groove inside for the sliding of the slider 7. The groove is preferably rectangular, and the slider 7 is preferably rectangular to prevent the rotation of the clamping screw 8 from causing the slider 7 to rotate. The top of the movable base 6 is provided with a cover plate 19 to cover the groove, so that the slider 7 can be installed into the groove from the top of the movable base 6. During the installation process, the T-shaped structure 10 is slid into the T-shaped groove 9, and then the cover plate 19 is fixed to the top of the movable base 6 by fixing screws 21.

[0046] Positioning pins 11 are fixedly provided on the side of the moving mechanism of the basin-facing positioning seat 1 and / or the back-facing positioning seat 2. The positioning pins 11 can abut and position the end face of the blade body of the leaf crown 18 connecting the blade 17, ensuring the accurate positioning of the wear-resistant block 20 and the leaf crown 18.

[0047] like Figure 1 , Figure 3 As shown, the side of the basin-oriented positioning seat 1 facing the back-facing positioning seat 2 is an outwardly convex outer curved surface 13, and the side of the back-facing positioning seat 2 facing the basin-oriented positioning seat 1 is an inwardly concave inner curved surface 14. The outer curved surface 13 and the inner curved surface 14 can match the shape of the two sides of the blade 17, increasing the clamping area of ​​the blade 17 during clamping, ensuring the stability of clamping, and avoiding damage to the blade 17.

[0048] like Figure 5 As shown, the end face of the clamping block 3 away from the linear movement mechanism includes a first clamping surface 15 and a second clamping surface 16. The first clamping surface 15 and the second clamping surface 16 are set at an angle. The first clamping surface 15 and the second clamping surface 16 on the clamping block 3 can press against the two adjacent sides of the wear-resistant block 20, which facilitates the positioning of the wear-resistant block 20.

[0049] In the embodiments of this utility model, the clamping block 3 is made of ceramic material, which can withstand high temperatures above 1200 degrees Celsius, thus avoiding damage to the clamping block 3 during the welding process.

[0050] Working principle: 1. The knurled head screw 4 is disengaged from the threaded hole of the locating seat 1, and the locating seat 1 and the locating seat 2 rotate around the rotating pin 22 to form an open structure.

[0051] 2. Place the blade 17 into the fixture, and rotate the basin towards the positioning seat 1 and away from the positioning seat 2 around the rotating pin 22 to close them, so that the blade 17 fits against the outer curved surface 13 and the inner curved surface 14, and the bottom of the blade crown 18 abuts against the positioning ball pin 11 to achieve positioning; rotate the knurled high-head screw 4 into the threaded hole of the basin towards the positioning seat 1 to make the blade 17 fit and press against the fixture, as shown. Figure 6 , Figure 7 .

[0052] 3. Rotate the clamping screw 8 to move the slider 7 and the clamping block 3 away from the surface to be welded on the blade 17. After placing the wear-resistant block 20, rotate the clamping screw 8 to move the slider 7 and the clamping block 3 to press the wear-resistant block 20 onto the surface to be welded on the blade crown 18 of the blade 17.

[0053] 4. Place the clamped blade 17, fixture, and wear-resistant block 20 together into a vacuum furnace for brazing;

[0054] 5. After welding is completed, proceed to step 1 to remove blade 17;

[0055] 6. Repeat steps 2, 3, 4, and 5 to perform the welding process of blade 17 and wear-resistant block 20.

[0056] In this invention, the basin-oriented positioning seat 1 and the back-oriented positioning seat 2 are hinged together. At the welding surface, the basin-oriented positioning seat 1 and the back-oriented positioning seat 2 clamp the blade body of the blade 17. By adjusting the distance adjustment structure, the clamping of the blade body of the blade 17 is achieved, effectively reducing the volume of the fixture. The linear movement mechanism drives the movement of the pressing block 3, which can effectively press the wear-resistant block 20 against the surface to be welded, thus achieving the positioning of the wear-resistant block 20. The structure is compact and lightweight, and the clamping is stable and reliable, meeting the requirements for use in vacuum arc brazing equipment.

[0057] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0058] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] 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 mechanical connection or an electrical connection; 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.

[0060] 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.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding fixture for aero-engine blades, characterized in that, It includes a basin-oriented positioning seat (1) and a back-oriented positioning seat (2). The first end of the basin-oriented positioning seat (1) and the first end of the back-oriented positioning seat (2) are hinged together. The second end of the basin-oriented positioning seat (1) and the second end of the back-oriented positioning seat (2) are connected by a distance adjustment mechanism to adjust the distance between the second end of the basin-oriented positioning seat (1) and the second end of the back-oriented positioning seat (2). A linear moving mechanism is fixed on the second end of the basin-oriented positioning seat (1) and the first end of the back-oriented positioning seat (2). The output ends of the two linear moving mechanisms are arranged facing each other, and a pressing block (3) is installed on the output end of the linear moving mechanism. Under the drive of the two linear moving mechanisms, the pressing blocks (3) on the two linear moving mechanisms move closer to each other or further away from each other.

2. The aero-engine blade welding fixture according to claim 1, characterized in that, The distance adjustment mechanism includes a knurled head screw (4), the screw end of which slides through the back positioning seat (2) and is threadedly connected to the basin positioning seat (1); or, the screw end of the knurled head screw (4) slides through the basin positioning seat (1) and is threadedly connected to the back positioning seat (2).

3. The aero-engine blade welding fixture according to claim 1, characterized in that, The clamping block (3) is hinged to the output end of the linear motion mechanism via a pin (5).

4. The aero-engine blade welding fixture according to claim 1, characterized in that, The linear movement mechanism includes a movable seat (6), which is fixed on the basin-oriented positioning seat (1) or the back-oriented positioning seat (2). A slider (7) is slidably provided inside the movable seat (6). One end of the slider (7) extends from the movable seat (6) toward the other movable seat (6) and is connected to the clamping block (3). A slider drive is provided on the movable seat (6), which is connected to the slider (7) to drive the slider (7) to move closer to or away from the other movable seat (6).

5. The aero-engine blade welding fixture according to claim 4, characterized in that, The slider drive includes a clamping screw (8), which is threadedly connected to the movable seat (6) and rotatably connected to the end of the slider (7) away from the clamping block (3).

6. The aero-engine blade welding fixture according to claim 5, characterized in that, The slider (7) is provided with a T-shaped groove (9) at one end away from the clamping block (3), and a T-shaped structure (10) matching the T-shaped groove (9) is provided on one end of the clamping screw (8), and the T-shaped structure (10) is rotatably disposed in the T-shaped groove (9).

7. A welding fixture for aero-engine blades according to any one of claims 1 to 6, characterized in that, The basin-facing positioning seat (1) and / or the back-facing positioning seat (2) are provided with a positioning ball pin (11) fixed on the side of the moving mechanism.

8. A welding fixture for aero-engine blades according to any one of claims 1 to 6, characterized in that, Both the basin-oriented positioning seat (1) and the back-oriented positioning seat (2) are provided with hollow holes (12).

9. A welding fixture for aero-engine blades according to any one of claims 1 to 6, characterized in that, The side of the basin-oriented positioning seat (1) facing the back-oriented positioning seat (2) is an outwardly convex outer curved surface (13), and the side of the back-oriented positioning seat (2) facing the basin-oriented positioning seat (1) is an inwardly concave inner curved surface (14).

10. A welding fixture for aero-engine blades according to any one of claims 1 to 6, characterized in that, The end face of the clamping block (3) away from the linear movement mechanism includes a first clamping surface (15) and a second clamping surface (16), which are arranged at an angle.

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