Blade tip maintenance machining clamp

Abstract

The utility model discloses a kind of blade tip maintenance and processing clamps, including bottom plate, mounting seat and damping component;The mounting seat is fixed on bottom plate, tenon groove that is adapted to blade tenon profile is opened on the mounting seat, the mounting seat is also provided with the limiting structure for limiting blade tenon displacement and the top tight piece for the top tight positioning blade;The damping component is fixed on bottom plate, and the damping component includes container seat and container;The beneficial effects of the utility model are: with the characteristics of high blade tenon self-processing precision, with the tenon groove that is adapted to blade tenon profile on mounting seat as core positioning reference, the displacement constraint of blade tenon and the top tight effect of top tight piece are matched with limiting structure, construct reference adaptation, limit, the triple positioning mechanism of top tight, effectively avoid the problem of large positioning deviation of prior art, ensure the positioning consistency and precision of blade tip maintenance and processing, provide reliable guarantee for the dimensional accuracy of blade tip maintenance.

Description

Technical Field

[0001] This utility model relates to a blade tip repair and processing fixture. Background Technology

[0002] As a core component of aero-engine propulsion systems, aero-engine blades operate under complex conditions of high temperature, high pressure, and high-speed airflow. Their blade tips are prone to wear, deformation, or damage due to friction, erosion, and fatigue, directly affecting the engine's aerodynamic performance, operating efficiency, and reliability. Therefore, precise repair and machining of damaged blade tips to restore their design dimensions and profile accuracy is crucial for ensuring the continuous and stable operation of aero-engines.

[0003] In the repair and machining of blade tips, the positioning accuracy and clamping efficiency of the fixture directly determine the repair quality and overall machining efficiency. However, existing blade tip repair and machining fixtures lack multi-dimensional collaborative limiting design, failing to effectively restrict the lateral and longitudinal movement of the blade tenon. Furthermore, the arrangement and force direction of the clamping components are unreasonable, making it difficult to accurately offset the fit clearance. During machining, the blade is prone to slight displacement due to vibration, cutting forces, and other factors, further exacerbating positioning errors and affecting the stability of the repair and machining process. Therefore, this utility model proposes a blade tip repair and machining fixture to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a blade tip repair and processing fixture to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A blade tip repair and processing fixture includes a base plate, a mounting base, and a vibration damping component; The mounting base is fixed to the base plate. The mounting base has a mortise groove that matches the profile of the blade tenon. The mounting base also has a limiting structure for limiting the displacement of the blade tenon and a clamping member for clamping and positioning the blade. The vibration damping component is fixed to the base plate. The vibration damping component includes a container seat and a container. The container is connected to the container seat. The container is provided with a limiting member for limiting the position of the blade body. The container is used to cast a low melting point alloy to solidify the blade body.

[0006] As an improvement to the above technical solution, the tenon groove is formed by slow wire cutting, and the dimensional tolerance of the tenon groove is adapted to the dimensional tolerance of the blade tenon.

[0007] As an improvement to the above technical solution, the limiting structure includes a first baffle and a second baffle, the first baffle and the second baffle are respectively disposed on both sides of the mounting base, and the first baffle and the second baffle are disposed on the side close to the blade tenon. The clamping component is a universal screw, and at least one universal screw is provided, with the clamping end of the universal screw facing the side wall of the blade tenon.

[0008] As an improvement to the above technical solution, the limiting member is a baffle, and at least one baffle is provided. When there are multiple sets of baffles, the multiple sets of baffles are evenly arranged in a ring array along the axis of the container, and the height of the baffle is not higher than the height of the inner wall of the container 42. The container is provided with a sliding groove, and the baffle is adapted to the sliding groove for positioning the blade body when the blade extends into the container.

[0009] As an improvement to the above technical solution, the container and the container seat are fixedly connected by bolts, welding or snap-fit, and the inner wall of the container is a smooth surface; The container seat has a placement slot for placing the blades inside.

[0010] As an improvement to the above technical solution, the base plate also includes an auxiliary support assembly, which includes a lower support block, an auxiliary block, and an upper support plate; The lower support block is fixed to the base plate, and the auxiliary block is disposed between the side wall of the lower support block and the top of the base plate; The upper support plate and the lower support block are detachably connected.

[0011] As an improvement to the above technical solution, the mounting base and the base plate are integrally formed, or the mounting base is fixed to the base plate by welding or bolt connection.

[0012] As an improvement to the above technical solution, the depth of the tenon groove is not less than 1 / 2 of the length of the blade tenon, and the roughness Ra of the inner wall of the tenon groove is ≤0.8μm.

[0013] Compared with the prior art, the beneficial effects of this utility model are: Leveraging the high machining precision of the blade tenon itself, and using the mortise on the mounting base that matches the contour of the blade tenon as the core positioning reference, combined with the displacement constraint of the blade tenon by the limiting structure and the clamping effect of the clamping component, a triple positioning mechanism of reference adaptation, limiting, and clamping is constructed. This effectively avoids the problem of large positioning deviation in existing technologies, ensures the positioning consistency and accuracy of blade tip repair and machining, and provides a reliable guarantee for the dimensional accuracy of blade tip repair. The blade tenon can be directly inserted into the mortise to quickly complete the initial positioning. The clamping operation can then be completed by locking the limiting structure and tightening the clamping component. There is no need for complicated adjustment and calibration procedures. The operation is simple and efficient, which significantly shortens the blade clamping time, solves the core pain point of low clamping efficiency in existing technologies, and improves the overall flow efficiency of aero-engine blade maintenance and processing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the base plate of this utility model; Figure 4 This utility model Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the structure of the limiting component of this utility model; Figure 6 This is a schematic diagram of the structure of the container of this utility model; Figure 7 This is a schematic diagram of the limiting structure of this utility model.

[0015] In the diagram: 10, base plate; 20, auxiliary support assembly; 21, auxiliary block; 22, lower support block; 23, upper support plate; 30, mounting base; 31, tenon; 40, vibration damping assembly; 41, container base; 42, container; 43, placement groove; 44, sliding groove; 50, baffle; 60, limiting structure; 61, first baffle; 62, second baffle; 70, universal screw. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: like Figure 1-7 As shown, this embodiment proposes a blade tip repair and processing fixture, including a base plate 10, a mounting base 30, and a vibration damping component 40; The mounting base 30 is fixed on the base plate 10. The mounting base 30 has a tenon groove 31 that matches the profile of the blade tenon. The mounting base 30 also has a limiting structure 60 for limiting the displacement of the blade tenon and a clamping member for clamping and positioning the blade. The vibration damping component 40 is fixed on the base plate 10. The vibration damping component 40 includes a container seat 41 and a container 42. The container 42 is connected to the container seat 41. The container 42 is provided with a limiting member for limiting the position of the blade body. The container 42 is used to cast a low melting point alloy to solidify the blade body.

[0018] In this embodiment, when positioning the blade, the blade is first placed in the container 42, and the blade body is positioned by the limiting member in the container 42. Then, the blade tenon is placed in the tenon 31 and reinforced by the limiting structure 60 and the tightening member. Finally, the low melting point alloy is placed at the limiting member for another time. Leveraging the high machining precision of the blade tenon itself, the tenon groove 31 on the mounting base 30, which matches the contour of the blade tenon, is used as the core positioning reference. Combined with the displacement constraint of the blade tenon by the limiting structure 60 and the clamping effect of the clamping component, a triple positioning mechanism of "reference adaptation, limiting, and clamping" is constructed. This effectively avoids the problem of large positioning deviation in existing technologies, ensures the positioning consistency and accuracy of blade tip repair and machining, and provides a reliable guarantee for the dimensional accuracy of blade tip repair. The blade tenon can be directly inserted into the mortise 31 to quickly complete the initial positioning. Subsequently, the clamping operation can be completed by locking the limiting structure 60 and tightening the clamping part. There is no need for complicated adjustment and calibration procedures. The operation is simple and efficient, which significantly shortens the blade clamping time, solves the core pain point of low clamping efficiency in existing technologies, and improves the overall flow efficiency of aero-engine blade maintenance and processing.

[0019] Specifically, the tenon 31 is formed by wire EDM cutting, and the dimensional tolerance of the tenon 31 is adapted to the dimensional tolerance of the blade tenon.

[0020] In this embodiment, the slow wire EDM process has micron-level machining precision, which can accurately replicate the contour shape of the blade tenon. This ensures that the dimensional accuracy, form and position tolerance, and surface quality of the tenon 31 are all at a high standard after forming, providing a high-precision reference carrier for blade positioning and avoiding positioning deviations caused by the machining error of the tenon 31 itself from the source.

[0021] Specifically, the limiting structure 60 includes a first baffle 61 and a second baffle 62. The first baffle 61 and the second baffle 62 are respectively disposed on both sides of the mounting base 30, and the first baffle 61 and the second baffle 62 are disposed on the side close to the blade tenon. The clamping component is a universal screw 70, and at least one universal screw 70 is provided, with the clamping end of the universal screw 70 facing the side wall of the blade tenon.

[0022] In this embodiment, the first baffle 61 and the second baffle 62 are respectively disposed on both sides of the mounting base 30 and close to the blade tenon, forming a bidirectional symmetrical limiting structure 60, which can accurately constrain the displacement space of the blade tenon from both sides in the lateral direction, effectively avoid the risk of unilateral movement caused by a single limiting structure 60, ensure the stability of the reference position of the tenon in the mortise 31, and provide a reliable pre-positioning guarantee for subsequent clamping and positioning. The limiting structure 60 limits the lateral limit position of the tenon by the first baffle 61 and the second baffle 62. The tightening end of the universal screw 70 is arranged facing the side wall of the tenon, which can apply a precise tightening force within the range limited by the first baffle 61 and the second baffle 62, forming a two-way limiting and directional tightening collaborative positioning mechanism. This greatly reduces the fit clearance between the tenon and the mortise 31, avoids the blade from undergoing slight displacement due to vibration or force during processing, and significantly improves the consistency and accuracy of blade positioning.

[0023] Specifically, the limiting member is a baffle 50, and at least one baffle 50 is provided. When there are multiple sets of baffles 50, the multiple sets of baffles 50 are evenly arranged in a ring array along the axis of the container 42, and the height of the baffle 50 is not higher than the height of the inner wall of the container 42. The container 42 is provided with a sliding groove 44, and the baffle 50 is adapted to the sliding groove 44 for positioning the blade body when the blade extends into the container 42.

[0024] In this embodiment, the baffle 50 acts directly on the blade body as a limiting member. By arranging at least one baffle 50, the core position of the blade body can be quickly defined, preventing the blade body from radially shifting or circumferentially twisting within the container 42. When multiple sets of baffles 50 are evenly arranged in a ring array along the axis of the container 42, they can form symmetrical constraints from multiple directions around the blade body, ensuring that the blade body is always in the central reference position of the container 42. This provides a unified attitude reference for subsequent low-melting-point alloy solidification and overall blade positioning, effectively avoiding the problem of insufficient processing accuracy caused by blade body position deviation.

[0025] Specifically, the container 42 and the container base 41 are fixedly connected by bolts, welding or snap-fit, and the inner wall of the container 42 is a smooth surface; The container base 41 is provided with a placement groove 43 for placing the blade body in the container base 41.

[0026] Specifically, the base plate 10 also includes an auxiliary support assembly 20, which includes a lower support block 22, an auxiliary block 21, and an upper support plate 23. The lower support block 22 is fixed to the base plate 10, and the auxiliary block 21 is disposed between the side wall of the lower support block 22 and the top of the base plate 10. The upper support plate 23 and the lower support block 22 are detachably connected.

[0027] In this embodiment, the auxiliary block 21 is disposed between the side wall of the lower support block 22 and the top of the base plate 10 to form a triangular support configuration. By utilizing the mechanical stability characteristics of the triangular structure, the overturning resistance and load-bearing strength of the lower support block 22 are effectively improved, and the lower support block 22 is prevented from lateral displacement and deformation under the action of processing load or blade self-weight, thereby ensuring the structural stability of the entire fixture and providing a reliable structural foundation for blade positioning and vibration reduction.

[0028] Specifically, the mounting base 30 and the base plate 10 are integrally formed, or the mounting base 30 is fixed to the base plate 10 by welding or bolt connection.

[0029] Specifically, the depth of the tenon 31 is not less than 1 / 2 of the length of the blade tenon, and the roughness Ra of the inner wall of the tenon 31 is ≤0.8μm.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blade tip repair and machining fixture, characterized in that: Includes a base plate (10), a mounting base (30), and a vibration damping assembly (40); The mounting base (30) is fixed on the base plate (10). The mounting base (30) has a mortise (31) that matches the profile of the blade tenon. The mounting base (30) is also provided with a limiting structure (60) for limiting the displacement of the blade tenon and a clamping member for clamping and positioning the blade. The vibration damping component (40) is fixed on the base plate (10). The vibration damping component (40) includes a container seat (41) and a container (42). The container (42) is connected to the container seat (41). The container (42) is provided with a limiting member for limiting the position of the blade body. The container (42) is used to cast a low melting point alloy to solidify the blade body.

2. The blade tip repair and machining fixture according to claim 1, characterized in that: The tenon (31) is formed by wire EDM cutting, and the dimensional tolerance of the tenon (31) is adapted to the dimensional tolerance of the blade tenon.

3. The blade tip repair and machining fixture according to claim 1, characterized in that: The limiting structure (60) includes a first baffle (61) and a second baffle (62). The first baffle (61) and the second baffle (62) are respectively disposed on both sides of the mounting base (30), and the first baffle (61) and the second baffle (62) are disposed on the side close to the blade tenon. The clamping component is a universal screw (70), at least one universal screw (70) is provided, and the clamping end of the universal screw (70) is arranged facing the side wall of the blade tenon.

4. The blade tip repair and machining fixture according to claim 1, characterized in that: The limiting member is a baffle (50). At least one baffle (50) is provided. When there are multiple sets of baffles (50), the multiple sets of baffles (50) are evenly arranged in a ring array along the axis of the container (42), and the height of the baffle (50) is not higher than the height of the inner wall of the container (42). The container (42) is provided with a sliding groove (44), and the baffle (50) is adapted to the sliding groove (44) for positioning the blade body when the blade extends into the container (42).

5. A blade tip repair and machining fixture according to claim 1, characterized in that: The container (42) and the container seat (41) are fixedly connected by bolts, welding or snap-fit, and the inner wall of the container (42) is a smooth surface; The container seat (41) is provided with a placement groove (43) for placing the blade body in the container seat (41).

6. The blade tip repair and machining fixture according to claim 1, characterized in that: The base plate (10) also includes an auxiliary support assembly (20), which includes a lower support block (22), an auxiliary block (21) and an upper support plate (23). The lower support block (22) is fixed on the base plate (10), and the auxiliary block (21) is disposed between the side wall of the lower support block (22) and the top of the base plate (10); The upper support plate (23) and the lower support block (22) are detachably connected.

7. A blade tip repair and machining fixture according to claim 1, characterized in that: The mounting base (30) and the base plate (10) are integrally formed, or the mounting base (30) is fixed to the base plate (10) by welding or bolt connection.

8. A blade tip repair and machining fixture according to claim 1, characterized in that: The depth of the tenon (31) is not less than 1 / 2 of the length of the blade tenon, and the roughness Ra of the inner wall of the tenon (31) is ≤0.8μm.

Images