Aero-engine first row adjusting sheet machining fixing clamp and machining method

Abstract

The aero-engine first row adjusting piece machining fixing clamp comprises a base, a fixed chuck is arranged on the upper side of one end, in the length direction, of the base, a movable chuck is arranged at the other end, opposite to the fixed chuck, of the base, the movable chuck is connected to a fixing plate through an adjusting screw rod, and the fixing plate is fixedly connected to the base; a first inner threaded hole matched with the adjusting screw rod is formed in the fixing plate; the number of the movable chucks is two, the two movable chucks are located at the two ends of the base in the width direction respectively, the distance between the two movable chucks is larger than the width of the clamping ends of the first row of adjusting pieces, auxiliary core rods are arranged on the inner sides of the movable chucks, and the length of the auxiliary core rods is larger than the distance between the two movable chucks. The clamp has the characteristics that clamping is firm, parts are not prone to being damaged, and machining precision is high; the structure is simple, design is reasonable, and operation is convenient.

Description

Technical Field

[0001] The present invention relates to a fixing fixture and a processing method for an aero-engine part, in particular to a fixing fixture and a processing method for the first row of regulating vanes of an aero-engine. Background Art

[0002] The shape of the first row of regulating vanes of an aero-engine is similar to an isosceles trapezoid. Shaft holes are provided on both the upper base and the lower base of the isosceles trapezoid. Among them, the longer lower base is a circular shaft hole, while the shorter upper base is a C-shaped hole.

[0003] After the blank of the first row of regulating vanes of an aero-engine is processed with the circular hole and the C-shaped hole on the base, it is also necessary to perform processing such as drilling and grinding on the part surface. In order to ensure the processing accuracy, it is usually necessary to firmly fix the regulating vane part.

[0004] Currently, the fixing fixture for the first row of regulating vanes of an aero-engine is similar to a centering clamp, mainly relying on the clamping blocks on both sides for clamping and fixing. The biggest problem with it is that: the hole wall on the C-shaped hole side serves as the clamping contact surface, lacking support, and the strength of the part is insufficient. When the clamping force is large, it is easy to cause deformation of the C-shaped hole wall, reducing the part quality and even damaging the part; while when the clamping force is small, the clamping firmness is not high, and the part is prone to displacement during the processing, resulting in a larger processing error, reducing the part quality and even causing the part to be scrapped.

[0005] The first row of regulating vanes of an aero-engine belongs to high-end equipment parts with high costs. In order to improve the processing quality and avoid part loss and scrapping during the processing, it is necessary to upgrade and improve its fixing fixture and fixing processing method. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a fixing fixture and a processing method for the first row of regulating vanes of an aero-engine. The present invention has the characteristics of firm clamping, not easily damaging parts, and high processing accuracy; and has a simple structure, reasonable design, and convenient operation.

[0007] One of the technical solutions of the present invention:

[0008] Provide a fixing fixture for the first row of regulating vanes of an aero-engine, including a base. A fixed chuck is provided on the upper side at one end in the length direction of the base, and a movable chuck is provided at the other end opposite to the fixed chuck. The movable chuck is connected to a fixing plate through an adjusting screw rod. The fixing plate is fixedly connected to the base, and a first internal thread hole matching with the adjusting screw rod is provided on the fixing plate;

[0009] There are 2 movable chucks in total, which are respectively located at both ends of the base in the width direction. The distance between the two movable chucks is greater than the width of the clamping end of the first row of adjusting pieces. An auxiliary mandrel is provided inside the movable chuck, and the length of the auxiliary mandrel is greater than the distance between the two movable chucks.

[0010] In this solution, by setting 2 movable chucks and arranging them on both sides, and using the auxiliary mandrel to assist in clamping the first row of adjusting pieces, it can avoid the chuck directly acting on the C-shaped hole wall of the first row of adjusting pieces, and has the advantages of firm clamping and not easily damaging parts; in addition, the structure of this solution is simple, the design is reasonable, the operation is convenient, and it is suitable for popularization and application.

[0011] Preferably, for the above-mentioned machining and fixing fixture for the first row of adjusting pieces of an aero-engine, an anti-slip limiting groove I is provided inside the fixed chuck.

[0012] By setting the anti-slip limiting groove I in this solution, the displacement of the parts during the machining process can be avoided, and the clamping firmness is further improved.

[0013] Preferably, for the above-mentioned machining and fixing fixture for the first row of adjusting pieces of an aero-engine, an anti-slip limiting groove II is provided inside the movable chuck.

[0014] By setting the anti-slip limiting groove II in this solution, the displacement of the parts during the machining process can be avoided, and the clamping firmness is further improved.

[0015] Preferably, for the above-mentioned machining and fixing fixture for the first row of adjusting pieces of an aero-engine, 1 positioning plate is further provided at both ends of the base in the width direction. An internal thread hole II is provided on the positioning plate, and a positioning screw is threadedly connected through the internal thread hole II.

[0016] By setting the positioning plate and the positioning screw in this solution, the lateral positioning and fixing of the first row of adjusting pieces can be carried out, the clamping firmness is further improved, and the machining accuracy is ensured at the same time.

[0017] Preferably, for the above-mentioned machining and fixing fixture for the first row of adjusting pieces of an aero-engine, the end of the positioning screw in contact with the first row of adjusting pieces is in a pointed shape.

[0018] The end of the positioning screw in this solution is in a pointed shape, which reduces the contact area with the parts, has more accurate positioning and smaller error.

[0019] Preferably, for the above-mentioned machining and fixing fixture for the first row of adjusting pieces of an aero-engine, the diameter of the auxiliary mandrel is the same as the diameter of the C-shaped hole of the clamping end of the first row of adjusting pieces.

[0020] By reasonably setting the diameter size of the auxiliary mandrel in this solution to be the same as the diameter of the C-shaped hole, it can avoid the parts from shaking due to the diameter difference during the clamping process, and further ensure the machining accuracy.

[0021] Preferably, in the aforementioned machining and fixing fixture for the first row of regulating vanes of an aero-engine, a guiding block is arranged between the movable chuck and the fixing plate. The guiding block is fixedly connected to the base, and a guiding hole for cooperating with the movable chuck is arranged in the guiding block.

[0022] In this solution, by arranging the guiding block and the guiding hole and making them cooperate with the movable chuck, the clamping firmness is further improved, and the machining accuracy is ensured.

[0023] The second technical solution of the present invention:

[0024] Provide a machining method for the first row of regulating vanes of an aero-engine, including the following steps:

[0025] S1. Take the blank of the first row of regulating vanes to be machined;

[0026] S2. Place one end of the circular hole of the blank on the inner side of the fixed chuck, and snap its end into the anti-slip limit groove one on the inner side of the fixed chuck;

[0027] S3. Insert the auxiliary mandrel into the C-shaped hole at the other end of the blank of the first row of regulating vanes, then turn the blank of the first row of regulating vanes together with the auxiliary mandrel to the inner side of the movable chuck, and rotate the adjusting screw rod to gently clamp the anti-slip limit groove two on the inner side of the movable chuck on the auxiliary mandrel;

[0028] S4. Adjust the positioning screw rods on both sides of the base so that the ends of the positioning screw rods are in close contact with both sides of the blank of the first row of regulating vanes;

[0029] S5. Continue to rotate the adjusting screw rod to make the movable chuck and the fixed chuck completely clamp the blank of the first row of regulating vanes, and then the conventional machining operations can be carried out on the blank of the first row of regulating vanes.

[0030] The method of this solution is simple to operate, has firm clamping, accurate positioning, and can protect the parts from being damaged by clamping, and is suitable for popularization and application in industry.

[0031] The beneficial effects of the present invention:

[0032] 1. The present invention has arranged 2 movable chucks, which are arranged on both sides. At the same time, the auxiliary mandrel is used to assist in clamping the first row of regulating vanes, which can avoid the chuck directly acting on the C-shaped hole wall of the first row of regulating vanes, and has the advantages of firm clamping and not easily damaging the parts; in addition, the structure of the present invention is simple, the design is reasonable, the operation is convenient, and it is suitable for popularization and application.

[0033] 2. The present invention arranges the anti-slip limit groove one and the anti-slip limit groove two, which can avoid the displacement of the parts during the machining process and further improve the clamping firmness.

[0034] 3. By setting the positioning plate and positioning screw, the present invention can laterally position and fix the first row of adjusting pieces, further improving the clamping firmness and ensuring the machining accuracy at the same time. Meanwhile, the end of the positioning screw is in a pointed shape, reducing the contact area with the part, making the positioning more accurate and the error smaller.

[0035] 4. By reasonably setting the diameter size of the auxiliary mandrel to be the same as that of the C-shaped hole, the present invention avoids the shaking of the part caused by the diameter difference during the clamping process, further ensuring the machining accuracy.

[0036] 5. By setting the guiding block and guiding hole and matching them with the movable chuck, the present invention further improves the clamping firmness and ensures the machining accuracy.

[0037] 6. The method of the present invention is simple to operate, has firm clamping, accurate positioning, and can protect the part from being damaged by clamping, and is suitable for industrial popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG Figure 1 is a schematic diagram of the overall structure of the fixture of the present invention;

[0039] FIG Figure 2 is a top view of the fixture of the present invention;

[0040] FIG Figure 3 is a top view of the fixture of the present invention after clamping the first row of adjusting pieces of an aeroengine;

[0041] FIG Figure 4 is a partial cross-sectional view of the fixture of the present invention;

[0042] FIG Figure 5 is a front view of the C-shaped hole of the shorter upper bottom edge of the first row of adjusting pieces of the aeroengine described in the present invention.

[0043] Description of reference numerals: 1 - base, 2 - fixed chuck, 3 - movable chuck, 4 - adjusting screw, 5 - fixing plate, 6 - first internal thread hole, 7 - auxiliary mandrel, 8 - first anti-slip limit groove, 9 - second anti-slip limit groove, 10 - positioning plate, 11 - positioning screw, 12 - guiding block, 13 - guiding hole, 14 - second internal thread hole, 15 - blank of the first row of adjusting pieces of the aeroengine. DETAILED DESCRIPTION OF THE INVENTION

[0044] The following further illustrates the present invention with reference to embodiments, but it shall not be used as a basis for limiting the present invention.

[0045] Embodiments of the present invention

[0046] Embodiment 1

[0047] A fixing fixture for machining the first row of adjusting pieces of an aeroengine, as shown in FIG Figures 1-4As shown, it includes a base 1. On the upper side of one end in the length direction of the base 1, there is a fixed chuck 2. At the other end opposite to the fixed chuck 2, there is a movable chuck 3. The movable chuck 3 is connected to a fixing plate 5 through an adjusting screw rod 4. The fixing plate 5 is fixedly connected to the base 1. On the fixing plate 5, there is a first internal thread hole 6 that cooperates with the adjusting screw rod 4. The axial direction of the first internal thread hole 6 is the length direction of the base 1, and the movable chuck 3 can be adjusted to move telescopically relative to the fixed chuck 2.

[0048] There are 2 movable chucks 3 in total, which are respectively located at both ends in 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 adjusting pieces, and the distance is 1 - 2 cm larger than the width of the clamping end. Inside the movable chuck 3, there is an auxiliary mandrel 7. The auxiliary mandrel 7 is made of hard metal to prevent deformation during the clamping process. The length of the auxiliary mandrel 7 is greater than the distance between the two movable chucks 3.

[0049] When this embodiment is specifically used, take the first row of adjusting pieces of the aero-engine to be processed, place its longer lower bottom edge inside the fixed chuck 2, then insert the auxiliary mandrel 7 into the C-shaped hole of the shorter upper bottom edge, and then clamp the two ends of the auxiliary mandrel 7 inside the movable chuck 3. Rotate the adjusting screw rod 4 to make the movable chuck 3 press against the auxiliary mandrel 7 tightly. By applying force to one end of the C-shaped hole through the auxiliary mandrel 7 and interacting with the fixed chuck 2, the purpose of clamping and fixing is achieved.

[0050] For a further embodiment, as shown in the appendix Figures 1-4 Inside the fixed chuck 2, there is a first anti-slip limit groove 8.

[0051] In this embodiment, the contour of the first anti-slip limit groove 8 just fits the outer contour of the longer lower bottom edge of the first row of adjusting pieces of the aero-engine, so that it can just fix the lower bottom edge of the first row of adjusting pieces of the aero-engine and avoid dislocation and slippage.

[0052] For a further embodiment, as shown in the appendix Figures 1-4 Inside the movable chuck 3, there is a second anti-slip limit groove 9.

[0053] In this embodiment, the contour of the second anti-slip limit groove 9 just fits the outer contour of the auxiliary mandrel 7, so that it can just fix the auxiliary mandrel 7 and avoid dislocation and slippage.

[0054] For a further embodiment, as shown in the appendix Figures 1-4 At both ends in the width direction of the base 1, there is also 1 positioning plate 10 each. On the positioning plate 10, there is a second internal thread hole 14, and a positioning screw rod 11 is threadedly connected through the second internal thread hole 14.

[0055] The axial center height of the positioning screw 11 in this embodiment is exactly located at the positioning point on the side of the first row of adjusting pieces. After the first row of adjusting pieces is clamped and fixed, rotate the positioning screw 11 to make it move towards the side of the first row of adjusting pieces until it completely abuts against the first row of adjusting pieces.

[0056] A further embodiment is as shown in the appendix Figures 1-4 As shown, the end of the positioning screw 11 in contact with the first row of adjusting pieces is in a pointed shape, and the tip is in a round head shape to avoid scratching the parts.

[0057] A further embodiment is as shown in the appendix Figures 1-4 As shown, the diameter of the auxiliary mandrel 7 is the same as the diameter of the C-shaped hole at the clamping end of the first row of adjusting pieces.

[0058] When the auxiliary mandrel 7 of this embodiment is inserted into the C-shaped hole at the clamping end of the first row of adjusting pieces, there will be no shaking. Therefore, after clamping and fixing, the first row of adjusting pieces will not slip relative to the auxiliary mandrel 7. Therefore, the clamping is more firm.

[0059] A further embodiment is as shown in the appendix Figures 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 matching the movable chuck 3 is provided in the guide block 12.

[0060] The movable chuck 3 of this embodiment is square, and the guide hole 13 is also square, so that the movable chuck 3 can only perform telescopic movement in the guide hole 13 and cannot flip; the movable chuck 3 is rotatably connected to the adjusting screw 4 through a ball head or a flange connector, ensuring that the adjusting screw 4 can rotate relative to the movable chuck 3 and can also drive the movable chuck 3 to extend and retract back and forth.

[0061] Embodiment 2

[0062] A processing method for the first row of adjusting pieces of an aero-engine. The implementation of this method depends on the device shown in the appendix Figures 1-4 The method includes the following steps:

[0063] S1. Take the blank 15 of the first row of adjusting pieces to be processed;

[0064] S2. Place one end of the circular hole of the blank inside the fixed chuck 2 and snap its end into the anti-slip limit groove 8 inside the fixed chuck 2;

[0065] S3. Insert the auxiliary mandrel 7 into the C-shaped hole at the other end of the blank of the first row of adjusting pieces, then turn the blank of the first row of adjusting pieces together with the auxiliary mandrel 7 to the inside of the movable chuck 3, and rotate the adjusting screw 4 to gently clamp the anti-slip limit groove 9 inside the movable chuck 3 on the auxiliary mandrel 7;

[0066] S4. Adjust the positioning screws 11 on both sides of the adjusting base 1 so that the ends of the positioning screws 11 are in close contact with both sides of the first row of adjusting piece blanks;

[0067] S5. Continue to rotate the adjusting screw 4 so that the movable chuck 3 and the fixed chuck 2 completely clamp the first row of adjusting piece blanks. After clamping, as shown in the attachment Figure 3 At this time, the first row of adjusting piece blanks can be subjected to conventional processing operations.

[0068] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes should be covered within the protection scope of the present invention.

Claims

1. A processing and fixing fixture for the first row of regulating vanes of an aeroengine, characterized in that: It includes a base (1). On the upper side of one end in the length direction of the base (1), a fixed chuck (2) is provided. On the other end opposite to the fixed chuck (2), a movable chuck (3) is provided. The movable chuck (3) is connected to a fixed plate (5) via an adjusting screw rod (4). The fixed plate (5) is fixedly connected to the base (1). On the fixed plate (5), a first internal threaded hole (6) matching the adjusting screw rod (4) is provided. There are 2 movable chucks (3) in total, which are respectively located at both ends in 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 adjusting pieces. An auxiliary mandrel (7) is provided inside the movable chuck (3), and the length of the auxiliary mandrel (7) is greater than the distance between the two movable chucks (3).

2. The first row of adjustable vane processing and fixing fixture for an aeroengine according to claim 1, characterized in that: An anti-slip limit groove one (8) is provided inside the fixed chuck (2).

3. The first row of adjusting vane processing and fixing fixture for an aero-engine according to claim 1, characterized in that: An anti-slip limit groove two (9) is provided inside the movable chuck (3).

4. The first row of regulating vane machining and fixing fixture for an aeroengine according to claim 1, characterized in that: On both ends in the width direction of the base (1), 1 positioning plate (10) is further provided respectively. On the positioning plate (10), a second internal threaded hole (14) is provided, and a positioning screw rod (11) is threadedly connected through the second internal threaded hole (14).

5. The first row of adjusting vane processing and fixing fixture for an aero-engine according to claim 4, characterized in that: The end of the positioning screw rod (11) in contact with the first row of adjusting pieces is in a pointed shape.

6. The first row of regulating vane processing and fixing jig for an aeroengine according to claim 1, characterized in that: The diameter of the auxiliary mandrel (7) is the same as the diameter of the C-shaped hole at the clamping end of the first row of adjusting pieces.

7. The first row of adjustable vane processing and fixing fixture for an aeroengine according to claim 1, characterized in that: 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). A guide hole (13) matching the movable chuck (3) is provided inside the guide block (12).

8. A processing method for the first row of regulating vanes of an aeroengine, characterized in that It includes the following steps: S1. Take the blank of the first row of adjusting pieces to be processed. S2. Place one end of the circular hole of the blank on the inside of the fixed chuck (2), and snap its end into the anti-slip limit groove one (8) inside the fixed chuck (2). S3. Insert the auxiliary mandrel (7) into the C-shaped hole at the other end of the blank of the first row of adjusting pieces, then turn the blank of the first row of adjusting pieces together with the auxiliary mandrel (7) to the inside of the movable chuck (3), and rotate the adjusting screw rod (4) to gently clamp the anti-slip limit groove two (9) inside the movable chuck (3) on the auxiliary mandrel (7). S4. Adjust the positioning screw rods (11) on both sides of the base (1) so that the ends of the positioning screw rods (11) are in close contact with both sides of the blank of the first row of adjusting pieces. S5. Continue to rotate the adjusting screw rod (4) to make the movable chuck (3) and the fixed chuck (2) completely clamp the blank of the first row of adjusting pieces, and then the blank of the first row of adjusting pieces can be subjected to conventional processing operations.

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