Fixing clamp for machining of first row of adjusting pieces of aero-engine
By designing a fixed fixture for machining the first row of adjustment plates of an aero-engine, and adopting a combination of movable chuck and auxiliary mandrel for clamping, the problem of C-shaped hole wall deformation and displacement caused by existing fixtures was solved, achieving high-precision and low-damage machining results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-17
AI Technical Summary
The existing machining fixtures for the first row of adjustment blades in aero engines are prone to deformation or displacement of the C-shaped hole wall during clamping, which affects machining accuracy and part quality, and poses a risk of damaging the parts.
A machining fixture for the first row of adjustment plates of an aero-engine was designed. It adopts a combination of two movable chucks and an auxiliary mandrel to avoid the clamping force acting directly on the wall of the C-shaped hole. The fixture also improves the clamping firmness and accuracy through anti-slip limiting grooves, positioning plates and positioning screws.
It achieves secure clamping, reduces the risk of damaging parts, improves machining accuracy and part quality, reduces machining errors and scrap rates, and is simple to operate and suitable for widespread application.
Smart Images
Figure CN223998233U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a fixing fixture for machining aero-engine parts, and more particularly to a fixing fixture for machining the first row of adjustment plates of an aero-engine. Background Technology
[0002] The shape of the first row of adjustment vanes of the aircraft engine is similar to an isosceles trapezoid. Shaft holes are provided on both the upper and lower bases of the isosceles trapezoid. The longer lower base has a circular shaft hole, while the shorter upper base has a C-shaped hole.
[0003] After the circular holes and C-shaped holes on the bottom edge of the blank for the first row of adjustment plates of the aero-engine are machined, the surface of the part still needs to be drilled and ground. In order to ensure machining accuracy, the adjustment plate part usually needs to be fastened and fixed.
[0004] Currently, the machining and fixing fixture for the first row of adjustment blades in aero engines is similar to a centering clamp, mainly relying on clamping blocks on both sides for holding and fixing. The biggest problem with this is that the hole wall on the C-shaped hole side, as the clamping contact surface, lacks support and the part's strength is insufficient. When the clamping force is large, it is easy to cause deformation of the C-shaped hole wall, reducing the part's quality or even damaging the part. When the clamping force is small, the clamping firmness is not high, and the part is prone to displacement during machining, resulting in larger machining errors, reduced part quality, or even scrapping the part.
[0005] The first row of adjustment blades for aero engines are high-end equipment parts with high costs. In order to improve the processing quality and avoid damage and scrap of parts during the processing, it is necessary to upgrade and improve the fixing fixtures and fixing processing methods. Utility Model Content
[0006] To address the aforementioned technical problems, this utility model provides a machining and fixing fixture for the first row of adjustment blades in an aero-engine. This utility model features secure clamping, minimal damage to parts, and high machining accuracy; it also boasts a simple structure, reasonable design, and convenient operation.
[0007] The technical solution of this utility model:
[0008] A machining fixture for the first row of adjustment plates of an aero-engine is provided, including a base, a fixed chuck on the upper side of one end of the base along its length, and a movable chuck on the other end opposite to the fixed chuck. The movable chuck is connected to a fixed plate via an adjusting screw. The fixed plate is fixedly connected to the base, and the fixed plate is provided with an internal threaded hole that mates with the adjusting screw.
[0009] There are two movable chucks, located at both ends of the base width direction. The distance between the two movable chucks is greater than the width of the clamping end of the first row of adjusting plates. An auxiliary mandrel is provided on the inner side of the movable chuck, and the length of the auxiliary mandrel is greater than the distance between the two movable chucks.
[0010] This solution uses two movable chucks positioned on either side, along with an auxiliary mandrel to assist in clamping the first row of adjustment plates. This avoids the chucks directly impacting the C-shaped hole walls of the first row of adjustment plates, resulting in a secure clamping and minimizing damage to the parts. Furthermore, this solution features a simple structure, a reasonable design, and convenient operation, making it suitable for widespread application.
[0011] Preferably, the aforementioned aero-engine first row adjustment plate processing fixing fixture has an anti-slip limiting groove on the inner side of the fixing clamp.
[0012] This solution, by setting an anti-slip limiting groove, can prevent parts from shifting during processing, further improving the clamping firmness.
[0013] Preferably, the aforementioned machining and fixing fixture for the first row of adjustment plates of the aero-engine has an anti-slip limiting groove 2 on the inner side of the movable chuck.
[0014] This solution, by setting an anti-slip limiting groove, can prevent parts from shifting during processing, further improving the clamping firmness.
[0015] Preferably, in the aforementioned aero-engine first row adjustment plate processing and fixing fixture, each end of the base width direction is provided with a positioning plate, the positioning plate is provided with an internal thread hole two, and a positioning screw is threadedly connected through the internal thread hole two.
[0016] This solution uses a positioning plate and positioning screws to laterally position and fix the first row of adjusting plates, further improving the clamping firmness while ensuring machining accuracy.
[0017] Preferably, in the aforementioned aero-engine first row adjustment plate machining and fixing fixture, the end of the positioning screw that contacts the first row adjustment plate is pointed.
[0018] The positioning screw in this design has a pointed end, which reduces the contact area with the part, resulting in more accurate positioning and smaller errors.
[0019] Preferably, in the aforementioned aero-engine first row adjustment plate processing and fixing fixture, the diameter of the auxiliary mandrel is consistent with the diameter of the C-shaped hole at the clamping end of the first row adjustment plate.
[0020] This solution ensures machining accuracy by setting the diameter of the auxiliary mandrel to match the diameter of the C-shaped hole, thus preventing the part from shaking due to diameter differences during clamping.
[0021] Preferably, in the aforementioned aero-engine first row adjustment plate processing and fixing fixture, a guide block is provided between the movable chuck and the fixed plate, the guide block is fixedly connected to the base, and the guide block is provided with a guide hole that cooperates with the movable chuck.
[0022] This solution improves clamping stability and ensures machining accuracy by setting guide blocks and guide holes to cooperate with the movable chuck.
[0023] The beneficial effects of this utility model are:
[0024] 1. This utility model has two movable clamps arranged on both sides, and an auxiliary mandrel is used to assist in clamping the first row of adjustment plates. This avoids the clamps directly acting on the C-shaped hole wall of the first row of adjustment plates, and has the advantages of firm clamping and less damage to parts. In addition, this utility model has a simple structure, reasonable design, and convenient operation, and is suitable for widespread application.
[0025] 2. By setting up anti-slip limiting groove one and sliding limiting groove two, this utility model can prevent the displacement of parts during processing and further improve the clamping firmness.
[0026] 3. By setting a positioning plate and a positioning screw, this utility model can laterally position and fix the first row of adjustment plates, further improving the clamping firmness and ensuring the processing accuracy. At the same time, the end of the positioning screw is pointed, which reduces the contact area with the parts, making the positioning more accurate and the error smaller.
[0027] 4. By reasonably setting the diameter of the auxiliary mandrel to match the diameter of the C-shaped hole, this utility model avoids the shaking of the part due to the diameter difference during clamping, thus further ensuring the machining accuracy.
[0028] 5. By setting guide blocks and guide holes, this utility model can cooperate with movable chucks, further improving the clamping firmness and ensuring processing accuracy.
[0029] 6. The method of this utility model is simple to operate, firmly clamps, accurately positions, and can protect parts from being damaged by clamping, making it suitable for industrial application. Attached Figure Description
[0030] Appendix Figure 1 This is a schematic diagram of the overall structure of the clamp of this utility model;
[0031] Appendix Figure 2 This is a top view of the fixture of this utility model;
[0032] Appendix Figure 3 This is a top view of the fixture of this utility model holding the first row of adjustment blades of an aero engine;
[0033] Appendix Figure 4 This is a partial sectional view of the clamp of this utility model;
[0034] Appendix Figure 5 This is a front view of the C-shaped hole on the shorter upper bottom edge of the first row of adjusting blades of the aero-engine described in this utility model.
[0035] Explanation of reference numerals in the attached drawings: 1-base, 2-fixed chuck, 3-movable chuck, 4-adjusting screw, 5-fixed plate, 6-internal threaded hole one, 7-auxiliary mandrel, 8-anti-slip limiting groove one, 9-anti-slip limiting groove two, 10-positioning plate, 11-positioning screw, 12-guide block, 13-guide hole, 14-internal threaded hole two, 15-first row of adjusting plate blank. Detailed Implementation
[0036] The present invention will be further described below with reference to the embodiments, but this should not be construed as limiting the present invention.
[0037] Embodiments of this utility model
[0038] Example
[0039] A machining fixture for the first row of adjustment blades of an aero-engine, as shown in the attached figure. Figure 1-4 As shown, the system includes a base 1. A fixed chuck 2 is provided on the upper side of one end of the base 1 along its length, and a movable chuck 3 is provided on the other end opposite to the fixed chuck 2. The movable chuck 3 is connected to a fixed plate 5 via an adjusting screw 4. The fixed plate 5 is fixedly connected to the base 1. The fixed plate 5 is provided with an internal threaded hole 6 that mates with the adjusting screw 4. The axis of the internal threaded hole 6 is along the length of the base 1, allowing the movable chuck 3 to extend and retract relative to the fixed chuck 2.
[0040] There are two movable chucks 3, located at both ends of the width direction of the base 1. The distance between the two movable chucks 3 is greater than the width of the clamping end of the first row of adjustment plates. The distance is 1-2 cm larger than the width of the clamping end. An auxiliary core rod 7 is provided on the inner side of the movable chuck 3. The auxiliary core rod 7 is made of hard metal to prevent deformation during clamping. The length of the auxiliary core rod 7 is greater than the distance between the two movable chucks 3.
[0041] In this embodiment, when in use, the first row of adjustment plates of the aircraft engine to be processed is taken, and its longer lower bottom edge is placed inside the fixed chuck 2. Then, the auxiliary mandrel 7 is inserted into the C-shaped hole of the shorter upper bottom edge. The two ends of the auxiliary mandrel 7 are then clamped inside the movable chuck 3. The adjusting screw 4 is rotated so that the movable chuck 3 presses the auxiliary mandrel 7 against the fixed chuck 2. The auxiliary mandrel 7 applies force to one end of the C-shaped hole, interacts with the fixed chuck 2, and achieves the purpose of clamping and fixing.
[0042] Further implementation, for example, is attached. Figure 1-4As shown, the inner side of the fixed clamp 2 is provided with an anti-slip limiting groove 8.
[0043] In this embodiment, the contour of the anti-slip limiting groove 8 is exactly in contact with the outer contour of the longer lower bottom edge of the first row of adjustment plates of the aero-engine, so that it can just fix the lower bottom edge of the first row of adjustment plates of the aero-engine and avoid misalignment and slippage.
[0044] Further implementation, for example, is attached. Figure 1-4 As shown, the inner side of the movable clamp 3 is provided with an anti-slip limiting groove 9.
[0045] In this embodiment, the contour of the anti-slip limiting groove 2 9 fits perfectly with the outer contour of the auxiliary core rod 7, so that it can fix the auxiliary core rod 7 in place and prevent misalignment and slippage.
[0046] Further implementation, for example, is attached. Figure 1-4 As shown, each end of the base 1 in the width direction is provided with a positioning plate 10. The positioning plate 10 is provided with an internal threaded hole 14, and a positioning screw 11 is threadedly connected to the internal threaded hole 14.
[0047] In this embodiment, the axial height of the positioning screw 11 is just located at the positioning point on the side of the first row of adjustment pieces. After the first row of adjustment pieces is clamped and fixed, the positioning screw 11 is rotated to move it toward the side of the first row of adjustment pieces until the first row of adjustment pieces is completely pressed against it.
[0048] Further implementation, for example, is attached. Figure 1-4 As shown, the end of the positioning screw 11 that contacts the first row of adjusting plates is pointed, and the pointed end is rounded to avoid scratching the parts.
[0049] Further implementation, for example, is attached. Figure 1-4 As shown, the diameter of the auxiliary core rod 7 is the same as the diameter of the C-shaped hole at the clamping end of the first row of adjustment plates.
[0050] In this embodiment, the auxiliary mandrel 7 will not wobble when inserted into the C-shaped hole at the clamping end of the first row of adjustment pieces. Therefore, after clamping and fixing, the first row of adjustment pieces will not slide relative to the auxiliary mandrel 7, thus making the clamping more secure.
[0051] Further implementation, for example, is attached. Figure 1-4 As shown, a guide block 12 is provided between the movable chuck 3 and the fixed plate 5. The guide block 12 is fixedly connected to the base 1, and a guide hole 13 is provided in the guide block 12 to cooperate with the movable chuck 3.
[0052] In this embodiment, the movable chuck 3 is square, and the guide hole 13 is also square, so that the movable chuck 3 can only move in and out within the guide hole 13 and cannot be flipped. The movable chuck 3 is rotatably connected to the adjusting screw 4 via a ball head or flange connector, ensuring that the adjusting screw 4 can rotate relative to the movable chuck 3, and at the same time can drive the movable chuck 3 to extend and retract back and forth.
[0053] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be included within the protection scope of the present invention.
Claims
1. An aeroengine first row damper vane machining fixture, characterized in that: The base (1) is provided with a fixed clamp head (2) on one end of the length direction, and is provided with a movable clamp head (3) on the other end opposite to the fixed clamp head (2), the movable clamp head (3) is connected to a fixed plate (5) through an adjusting screw (4), the fixed plate (5) is fixedly connected to the base (1), and the fixed plate (5) is provided with an inner threaded hole (6) matched with the adjusting screw (4); The movable clamp head (3) is provided with two, which are located at two ends of the width direction of the base (1), the spacing between the two movable clamp heads (3) is greater than the width of the clamping end of the first row of adjusting pieces, and the inner side of the movable clamp head (3) is provided with an auxiliary mandrel (7), the length of the auxiliary mandrel (7) is greater than the spacing between the two movable clamp heads (3).
2. The aero-engine first row damper blade machining fixture according to claim 1, characterized in that: The inner side of the fixed clamp head (2) is provided with an anti-skid limiting groove (8).
3. The aero-engine first row damper blade machining fixture according to claim 1, characterized in that: The inner side of the movable clamp head (3) is provided with an anti-skid limiting groove (9).
4. The turbine first row airfoil machining fixture of claim 1, wherein: The base (1) is provided with a fixed plate (10) at each of the two ends of the width direction, the fixed plate (10) is provided with an inner threaded hole (14), and a positioning screw (11) is threadedly connected through the inner threaded hole (14).
5. The turbine first row airfoil machining fixture of claim 4, wherein: The end of the positioning screw (11) in contact with the first row of adjusting pieces is in the shape of a sharp head.
6. The turbine first row airfoil machining fixture of claim 1, wherein: The diameter of the auxiliary mandrel (7) is consistent with the diameter of the C-shaped hole of the clamping end of the first row of adjusting pieces.
7. The turbine first row airfoil vane machining fixture of claim 1, wherein: The movable clamp head (3) and the fixed plate (5) are provided with a guide block (12), the guide block (12) is fixedly connected to the base (1), and the guide block (12) is provided with a guide hole (13) matched with the movable clamp head (3).