A processing method for guide window blades

Abstract

The present invention relates to the technical field of aero-engine blade forging, and in particular to a method for processing guide window blades. The method comprises the following steps: Step S1, forging a two-piece forging component into a single piece to obtain a forged component, wherein the forged component includes two guide window blades and burrs formed by forging; Step S2, after the forged component in Step S1 has cooled, placing the forged component on a trimming fixture, and using laser trimming in a cold state to separate the two guide window blades from the burrs. Laser trimming is performed while the forging is cold and does not exert force on the forging. The cut guide window blade forging does not require a shape-correcting process, thereby improving the processing efficiency of the guide window blades.

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] Combine Figure 1 The figure shows a schematic diagram of the structure of a guide window blade. The guide window blade 100 includes a blade body 101 and two mounting plates 102, one at each end of the blade body 101. Due to the small size of the guide window blade, single-piece forging would result in low production efficiency. Therefore, a two-piece integrated production method is adopted during forging. After forging, the forged guide window blade needs to be cut from the burr of the forging. The traditional cutting method is hot stamping, but hot stamping has the problem that the forging is deformed after cutting, requiring the forging to be reshaped, 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 a two-piece-in-one forging component to obtain the 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 the two guide window blades are cut off from the burrs respectively by laser trimming in a cold state.

[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 provided 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-fitted, and the single-side clearance is 0.15 to 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: first 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 to obtain the first guide window blade forging;

[0018] Step S203: insert the burr support block into the rectangular slot of the base, and adjust 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 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 while the forging is cold and does not exert force on the forging. The resulting guide window blade forging does not require a reshaping process, thereby improving the efficiency of the guide window blade processing. Therefore, the method provided by the present invention overcomes the problem of conventional hot punching causing deformation of the forging and requiring a post-hot punching reshaping process.

[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. It has a simple structure and can provide good support and positioning for forged components 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 size. 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0026] Figure 1 Schematic diagram of the structure of the guide window blade;

[0027] Figure 2 Schematic diagram of the structure of the trimming fixture of the present invention;

[0028] Figure 3 Schematic diagram of the structure of the forged component placed on the 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 figures: 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 clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall 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 various 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 for descriptive purposes only and should not 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" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] Combine Figures 1 to 4 As shown, a method for processing a guide window blade includes 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 the two guide window blades 100 are cut off from the burrs 1 respectively by laser trimming in a cold state.

[0037] Laser trimming involves using a focusing lens to focus a laser beam on the surface of the forged component, melting the material. Simultaneously, compressed gas coaxial with the laser beam blows away the melted material. The laser beam and the material are then moved relative to each other along a specific trajectory, forming a precisely defined slit that separates the burr from the guide window blades 100. Laser trimming is performed while the forged component is cold and does not exert force on the forging. This avoids deformation caused by hot punching and eliminates the need for post-hot punching straightening.

[0038] Combine 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 position of the two guide window blades 100 .

[0039] Combine 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 blades 100 on the forged component; a rectangular slot 3a is provided 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 into 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-fitted, with a single-side clearance of 0.15 to 0.2 mm. The clearance fit facilitates installation and removal of the burr support block 4.

[0041] Combine Figure 3 As shown, a contoured support surface is provided on the top of the blade support block 5 for supporting the blade body 101 of the guide window blade 100 on the forged component and two mounting plates 102 for supporting the guide window blade 100. Furthermore, a contoured support surface is provided on the top of the contoured support block 6 for supporting the blade body 101 of the guide window blade 100 on the forged component and one of the mounting plates 102 for supporting the guide window blade 100.

[0042] Combine 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] Combine 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] Combine Figure 3 As shown, the trimming fixture meets the following requirements: When a forged component is placed on the trimming fixture, the distance H between the bottom surface of the burr 1 and the top surface of the base 3 satisfies the following conditions: H ≥ 2t, where t is the maximum thickness that can be cut by the laser beam of the laser equipment used during laser trimming. By maintaining this distance H, laser damage to the base 3 of the trimming fixture is prevented during laser cutting.

[0045] Combine 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 joint support for the forged component, ensuring the stability of the forged component when placed on the trimming fixture. In addition, by configuring the burr support block 4 as a movable block structure, the burr support block 4 can be removed during the first laser cutting to avoid interference with the laser cutting equipment. During the second laser cutting, 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, which would cause the trimming position to change. At the same time, during the second laser cutting, the cutting can be performed 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. Any equivalent structural transformation 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, is 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 includes 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 cut off from the burrs (1) respectively by laser trimming in a cold state of the forged component; 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 in the middle of the two guide window blades (100); 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).

2. The method for processing a guide window blade according to claim 1, 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.

3. The method for processing a guide window blade according to claim 1, characterized in that: A contoured support surface is provided on the top of the blade support block (5) for supporting 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).

4. The method for processing a guide window blade according to claim 1, wherein: A contoured support surface is provided on the top of the contoured 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).

5. The method for processing a guide window blade according to claim 1, wherein: 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).

6. The method for processing a guide window blade according to claim 1, characterized in that: 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).

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

8. The method for processing a guide window blade according to claim 1, wherein: 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 contoured 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 guide window blade (100) forging; 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 second guide window blade (100) remaining 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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