Machining method of flow guide window blade

Abstract

The invention relates to the technical field of aero-engine blade forging, in particular to a machining method of a flow guide window blade. Comprising the following steps that S1, forging is conducted in the mode that two pieces are integrated, a forged component is obtained, and the forged component comprises two flow guide window blades and burrs formed through forging; and S2, after the forged component in the step S1 is cooled, the forged component is placed on an edge cutting clamp, and the two flow guide window blades are cut off from the rough edges of the forged component in a laser edge cutting mode in the cold state. The laser trimming is carried out in the cold state of the forge piece and does not generate the force effect on the forge piece, the cut flow guide window blade forge piece does not need to be subjected to the shape correction procedure, and the to-be-machined efficiency of the flow guide window blade is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine blade forging, and in particular to a method for processing a guide window blade. Background Art

[0002] Combination Figure 1 The figure shows a schematic diagram of the structure of the guide window blade, which includes a blade body 101 and two mounting plates 102, and the two mounting plates 102 are respectively located at the two ends of the blade body 101. Since the guide window blade is small in size, if it is processed by a single-piece forging method, the production efficiency will be low, so the forging production adopts a two-piece integrated production method. After forging, the forged guide window blade needs to be cut off from the burr of the forging. The traditional cutting method is hot punching, but the problem with hot punching is that the forging is deformed after cutting, and the forging needs to be calibrated, which increases the forging production process. Summary of the invention

[0003] The main purpose of the present invention is to provide a method for processing guide window blades, aiming to solve the above technical problems.

[0004] To achieve the above object, the present invention provides a method for processing a guide window blade, comprising the following steps:

[0005] Step S1, forging is performed in a two-piece-in-one manner to obtain a forged component, wherein the forged component includes two guide window blades and burrs formed by forging;

[0006] Step S2: After the forged component in step S1 is cooled, the forged component is placed on a trimming fixture, and two guide window blades are respectively cut off from the burrs by laser trimming in a cold state of the forged component.

[0007] Preferably, in the obtained forged component, the four mounting plates on the two guide window blades are arranged in a straight line; a burr positioning block is integrally forged on the burr, and the burr positioning block is located in the middle of the two guide window blades.

[0008] Preferably, the trimming fixture includes a base, a burr support block, a blade support block and a contour support block; the blade support block is arranged at the middle position of the top surface of the base, and the contour support block is arranged at the left end position of the top surface of the base; the blade support block and the contour support block are respectively used to support the guide window blades on the forged component; a rectangular slot is arranged at the right end position of the top surface of the base; the lower end of the burr support block can be movably inserted in the rectangular slot, and the burr support block is used to support the burr positioning block.

[0009] Preferably, the side wall of the rectangular slot and the outer peripheral surface of the lower end of the burr support block are clearance-matched, and the single-side clearance is 0.15-0.2 mm.

[0010] Preferably, a contoured support surface is provided on the top of the blade support block for supporting the blade body of the guide window blade on the forged component and supporting two mounting plates of the guide window blade.

[0011] Preferably, a contoured support surface is provided on the top of the contoured support block for supporting the blade body of the guide window blade on the forged component and one of the mounting plates supporting the guide window blade.

[0012] Preferably, a semicircular support groove is provided on the top surface of the burr support block; the burr positioning block is a columnar structure and matches the profile of the support groove.

[0013] Preferably, the blade support block, the contoured support block and the base are an integrally formed structure, and the contoured support surfaces on the tops of the blade support block and the contoured support block are milled using the same machining reference on the base.

[0014] Preferably, the trimming fixture meets the following requirements: when the forged component is placed on the trimming fixture, the distance between the bottom surface of the burr and the top surface of the base is H, satisfying: H≥2t; where: t is the maximum thickness that can be cut by the laser beam of the laser equipment used during laser trimming.

[0015] Preferably, in step S2, the laser trimming process includes the following steps:

[0016] Step S201, firstly remove the burr support block on the trimming fixture, and then place the forged component on the trimming fixture, so that the blade support block supports one of the guide window blades, and the contour support block supports the other guide window blade;

[0017] Step S202, performing the first laser cutting: cutting the guide window blade supported by the blade support block from the burr edge to obtain the first guide window blade forging;

[0018] Step S203, inserting the burr support block into the rectangular slot of the base, adjusting the position of the forged component on the trimming fixture, so that the blade support block supports the remaining second guide window blade on the forged component, and the burr support block supports the burr positioning block;

[0019] Step S204, performing a second laser cutting: cutting the guide window blade supported by the blade support block from the burr edge to obtain a second guide window blade forging.

[0020] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0021] (1) In the present invention, laser trimming is performed when the forging is cold and does not exert force on the forging. The guide window blade forging obtained by cutting does not need to undergo a shape adjustment process, thereby improving the processing efficiency of the guide window blade. Therefore, the method provided by the present invention overcomes the problem that the existing hot punching causes deformation of the forging and requires a shape adjustment process after hot punching.

[0022] (2) In the present invention, a burr positioning block is integrally forged on the burr. When the forged component is subjected to a second laser cutting, the burr positioning block is supported by the burr support block on the trimming fixture to prevent the forged component from tilting toward the suspended section and causing the trimming position to change.

[0023] (3) The trimming fixture used in the present invention includes a base, a burr support block, a blade support block and a contour support block, and has a simple structure, and can provide good support and positioning for the forged component during laser trimming.

[0024] (4) The processing method provided by the present invention avoids deformation caused by hot punching and reduces the shaping process after hot punching, thereby reducing the number of processes and turnover time, improving production efficiency, and providing a method for the design of a laser trimming fixture for subsequent two-piece forgings of similar sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of the guide window blade;

[0027] Figure 2 It is a structural schematic diagram of the trimming fixture in the present invention;

[0028] Figure 3 A schematic diagram of the structure of a forged component placed on a trimming fixture during the first laser cutting;

[0029] Figure 4 Schematic diagram of the structure of the forged component placed on the trimming fixture during the second laser cutting.

[0030] Explanation of the accompanying drawings: 1. burr; 1a. burr positioning block; 3. base; 3a. rectangular slot; 4. burr support block; 4a. support groove; 5. blade support block; 6. contoured support block; 100. guide window blade; 101. blade body; 102. mounting plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] Combination Figures 1 to 4 As shown, a method for processing a guide window blade comprises the following steps:

[0035] Step S1, forging is performed in a two-piece-in-one manner to obtain a forged component, wherein the forged component includes two guide window blades 100 and burrs 1 formed by forging;

[0036] Step S2: After the forged component in step S1 is cooled, the forged component is placed on a trimming fixture, and two guide window blades 100 are cut off from the burrs 1 by laser trimming in a cold state.

[0037] Laser trimming is to focus the laser beam on the surface of the forged component material with a focusing mirror to melt the material, and at the same time use compressed gas coaxial with the laser beam to blow away the melted material, and make the laser beam and the material move relative to each other along a certain trajectory, so as to form a certain shape of cutting seam to separate the burr from the guide window blade 100. Laser trimming is performed when the forged component is cold and will not exert force on the forging, so as to avoid deformation of the forging caused by hot punching and there is no need to set a correction process after hot punching.

[0038] Combination Figure 3As shown, in the obtained forged component, the four mounting plates 102 on the two guide window blades 100 are arranged in a straight line; a burr positioning block 1 a is integrally forged on the burr 1 , and the burr positioning block 1 a is located in the middle of the two guide window blades 100 .

[0039] Combination Figure 2 , Figure 3 As shown, the trimming fixture includes a base 3, a burr support block 4, a blade support block 5 and a contour support block 6; the blade support block 5 is arranged at the middle position of the top surface of the base 3, and the contour support block 6 is arranged at the left end position of the top surface of the base 3; the blade support block 5 and the contour support block 6 are respectively used to support the guide window blade 100 on the forged component; a rectangular slot 3a is arranged at the right end position of the top surface of the base 3; the lower end of the burr support block 4 can be movably inserted in the rectangular slot 3a, and the burr support block 4 is used to support the burr positioning block 1a.

[0040] In this embodiment, the side wall of the rectangular slot 3a and the outer peripheral surface of the lower end of the burr support block 4 are clearance-matched, and the single-side clearance is 0.15-0.2 mm. The clearance fit is adopted to facilitate the installation and removal of the burr support block 4.

[0041] Combination Figure 3 As shown, a profiled support surface is provided on the top of the blade support block 5, which is used to support the blade body 101 of the guide window blade 100 on the forged component, and two mounting plates 102 supporting the guide window blade 100. Further, a profiled support surface is provided on the top of the profiled support block 6, which is used to support the blade body 101 of the guide window blade 100 on the forged component, and one of the mounting plates 102 supporting the guide window blade 100.

[0042] Combination Figure 2 As shown, a semicircular support groove 4a is provided on the top surface of the burr support block 4; the burr positioning block 1a is a columnar structure and matches the profile of the support groove 4a.

[0043] Combination Figure 2 As shown, the blade support block 5 , the contoured support block 6 and the base 3 are an integrally formed structure, and the contoured support surfaces on the tops of the blade support block 5 and the contoured support block 6 are milled using the same machining reference on the base 3 .

[0044] Combination Figure 3 As shown, the trimming fixture meets the following requirements: when the forged component is placed on the trimming fixture, the distance between the bottom surface of the burr 1 and the top surface of the base 3 is H, which satisfies: H ≥ 2t; where: t is the maximum thickness that can be cut by the laser beam of the laser equipment used in laser trimming. By ensuring the distance H, the laser is prevented from damaging the base 3 of the trimming fixture during laser cutting.

[0045] Combination Figure 3 and Figure 4 As shown, in step S2, the laser trimming process includes the following steps:

[0046] Step S201, first remove the burr support block 4 on the trimming fixture, and then place the forged component on the trimming fixture, so that the blade support block 5 supports one of the guide window blades 100, and the contour support block 6 supports the other guide window blade 100;

[0047] Step S202, performing the first laser cutting: cutting the guide window blade 100 supported by the blade support block 5 from the burr 1 to obtain the first forging of the guide window blade 100;

[0048] Step S203, insert the burr support block 4 into the rectangular slot 3a of the base 3, and adjust the position of the forged component on the trimming fixture so that the blade support block 5 supports the remaining second guide window blade 100 on the forged component, and the burr support block 4 supports the burr positioning block 1a;

[0049] Step S204 , performing a second laser cutting: cutting the guide window blade 100 supported by the blade support block 5 from the burr 1 to obtain a second forging of the guide window blade 100 .

[0050] In this embodiment, during the first laser cutting, the blade support block 5 and the contour support block 6 are used to form a common support for the forged component to ensure the stability of the forged component placed on the trimming fixture. In addition, by setting the burr support block 4 as a movable block structure, the burr support block 4 is removed during the first laser cutting to avoid interference with the laser cutting equipment. When the second laser cutting is performed, the burr support block 4 is used to support the burr positioning block 1a to prevent the forged component from tilting toward the suspended section and causing the trimming position to change. At the same time, during the second laser cutting, the blade support block 5 and the contour support block 6 can be cut from the area between the blade support block 5 and the contour support block 6 to avoid interference with the laser cutting equipment.

[0051] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for processing a guide window blade, characterized in that: The following steps are involved: Step S1, forging is performed in a two-piece-in-one manner to obtain a forged component, wherein the forged component comprises two guide window blades (100) and burrs (1) formed by forging; Step S2: After the forged component in step S1 is cooled, the forged component is placed on a trimming fixture, and the two guide window blades (100) are respectively cut off from the burrs (1) by laser trimming in a cold state of the forged component.

2. A method for processing a guide window blade according to claim 1, characterized in that: In the obtained forged component, four mounting plates (102) on two guide window blades (100) are arranged in a straight line; a burr positioning block (1a) is integrally forged on the burr (1), and the burr positioning block (1a) is located at the middle position of the two guide window blades (100).

3. A method for processing a guide window blade according to claim 2, characterized in that: The trimming fixture comprises a base (3), a burr support block (4), a blade support block (5) and a contour support block (6); The blade support block (5) is arranged at the middle position of the top surface of the base (3), and the contour support block (6) is arranged at the left end position of the top surface of the base (3); the blade support block (5) and the contour support block (6) are respectively used to support the guide window blade (100) on the forged component; A rectangular slot (3a) is provided at the right end of the top surface of the base (3); the lower end of the burr support block (4) can be movably inserted into the rectangular slot (3a), and the burr support block (4) is used to support the burr positioning block (1a).

4. A method for processing a guide window blade according to claim 3, characterized in that: The side wall of the rectangular slot (3a) and the outer peripheral surface of the lower end of the burr support block (4) are clearance-matched, and the single-side clearance is 0.15-0.2 mm.

5. A method for processing a guide window blade according to claim 3, characterized in that: A contoured support surface is provided on the top of the blade support block (5) for supporting a blade body (101) of a guide window blade (100) on a forged component and two mounting plates (102) for supporting the guide window blade (100).

6. A method for processing a guide window blade according to claim 3, characterized in that: A profiling support surface is provided on the top of the profiling support block (6) for supporting a blade body (101) of a guide window blade (100) on a forged component and one of the mounting plates (102) supporting the guide window blade (100).

7. A method for processing a guide window blade according to claim 3, characterized in that: A semicircular support groove (4a) is provided on the top surface of the burr support block (4); the burr positioning block (1a) is a columnar structure and matches the profile of the support groove (4a).

8. The method for processing a guide window blade according to claim 3, characterized in that: The blade support block (5), the contour support block (6) and the base (3) are an integrally formed structure, and the contour support surfaces on the tops of the blade support block (5) and the contour support block (6) are milled using the same machining reference on the base (3).

9. A method for processing a guide window blade according to claim 3, characterized in that: The trimming fixture meets the following requirements: when the forged component is placed on the trimming fixture, the distance between the bottom surface of the burr (1) and the top surface of the base (3) is H, which satisfies: H ≥ 2t; Where: t is the maximum thickness that can be cut by the laser beam of the laser equipment used in laser trimming.

10. A method for processing a guide window blade according to claim 3, characterized in that: In step S2, the laser trimming process includes the following steps: Step S201, first remove the burr support block (4) on the trimming fixture, and then place the forged component on the trimming fixture, so that the blade support block (5) supports one of the guide window blades (100), and the contour support block (6) supports the other guide window blade (100); Step S202, performing the first laser cutting: cutting the guide window blade (100) supported by the blade support block (5) from the burr (1) to obtain the first forging of the guide window blade (100); Step S203, inserting the burr support block (4) into the rectangular slot (3a) of the base (3), adjusting the position of the forged component on the trimming fixture, so that the blade support block (5) supports the remaining second guide window blade (100) on the forged component, and the burr support block (4) supports the burr positioning block (1a); Step S204, performing a second laser cutting: cutting the guide window blade (100) supported by the blade support block (5) from the burr (1) to obtain a second guide window blade (100) forging.

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