A scribing tool and method for a ring u-cavity structure mounting edge

Abstract

The present application relates to the technical field of aero-engine assembly, and particularly relates to a marking tool and method for an installation edge of an annular U-shaped cavity structure. The marking tool comprises a marking block and a support plate. The support plate comprises a first plate body and a second plate body vertically arranged at one end of the first plate body. The first plate body and the second plate body form an L-shaped support plate. The marking block is mounted on the first plate body. The distance A from the marking tip on the marking block to the inner wall surface of the second plate body is equal to the installation depth L of the small-diameter straight section of the connecting ring installed in the U-shaped cavity of the installation edge. The marking method comprises the following steps: S1, assembling the marking tool: mounting the marking block on the first plate body of the support plate to obtain the marking tool; S2, marking: extending the first plate body together with the marking block on the marking tool into the U-shaped cavity of the installation edge, and abutting the inner side surface of the second plate body of the support plate against the end surface of the inner layer of the installation edge, so that the marking operation can be performed.

Description

Technical Field

[0001] This invention relates to the field of aero-engine assembly technology, and in particular to a scribing tool and method for the mounting edge of an annular U-shaped cavity structure. Background Technology

[0002] Combination Figure 1 The diagram shown illustrates the assembly relationship between the mounting edge 100 and the connecting ring 200 of the inner cone outer layer assembly of an aero-engine.

[0003] The mounting edge 100 has an annular U-shaped cavity structure. The inner, outer, and bottom layers are all thin-walled. The outer wall is evenly distributed with rectangular holes. The width of the U-shaped cavity between the inner and outer layers is T=15mm and the depth is h=16mm.

[0004] The connecting ring 200 is a thin-walled annular sheet metal part. The structure of the connecting ring 200 consists of two straight sections with a tapered section in the middle. The outer diameters of the two straight sections are different. When assembling the mounting edge 100 and the connecting ring 200, the following requirements apply: the smaller diameter straight section of the connecting ring 200 is inserted into the U-shaped cavity of the mounting edge 100, with an installation depth L=10mm. The inner circle of the smaller diameter straight section of the connecting ring 200 rests on the inner outer circle of the mounting edge 100.

[0005] To ensure an installation depth of L=10mm, before the small-diameter straight section of the connecting ring 200 is inserted into the U-shaped cavity of the mounting edge 100, an assembly position line needs to be drawn on the outer circular wall of the inner layer of the mounting edge 100. The vertical distance from the assembly position line to the inner end face of the mounting edge 100 is 10mm. When assembling the small-diameter straight section of the connecting ring 200, it can be observed through the rectangular hole on the outer layer of the mounting edge 100. The end face of the small-diameter straight section of the connecting ring 200 should be coplanar with the assembly position line to meet the assembly requirements.

[0006] In engineering practice, vernier calipers or height gauges are usually used to mark the assembly position lines. However, because the mounting edge 100 has an annular U-shaped cavity structure and the U-shaped cavity is relatively narrow and the marking position is relatively deep, the measuring jaws of the vernier calipers or height gauges cannot be inserted into the U-shaped cavity to mark the lines, which makes it impossible to accurately assemble the connecting ring 200 into place to meet the assembly requirements. Summary of the Invention

[0007] The main objective of this invention is to propose a scribing tool and method for the mounting edge of an annular U-shaped cavity structure, solving the problem that the measuring jaws of ordinary vernier calipers or height gauges cannot be inserted into narrow semi-enclosed cavities for scribing.

[0008] To achieve the above objectives, on the one hand, the present invention proposes a scribing tool for mounting edges of an annular U-shaped cavity structure, comprising a scribing block and a support plate; the support plate comprises a first plate and a second plate perpendicularly disposed at one end of the first plate; the first plate and the second plate form an L-shaped support plate; the scribing block is mounted on the first plate; the distance A from the scribing tip on the scribing block to the inner wall of the second plate is equal to the mounting depth L of the small-diameter straight section of the connecting ring inserted into the U-shaped cavity of the mounting edge.

[0009] Preferably, a U-shaped groove is formed on the first plate; the scribing block includes a square block, a threaded rod integrally formed on the top surface of the square block, and a cone integrally formed on the bottom of the square block, the bottom tip of the cone being the scribing tip; the threaded rod of the scribing block passes through the U-shaped groove from bottom to top and is screwed with a locking nut.

[0010] Preferably, a sliding stop is provided on the side wall of the U-shaped groove; the square block of the scribing block slides in conjunction with the sliding stop.

[0011] Preferably, the vertical side surface of the cone and the end face of the square block are coplanar, forming a calibration plane; the inner wall surface of the second plate is set as a scribing positioning surface; the calibration plane and the scribing positioning surface are parallel to each other; and the scribing tip on the scribing block is located on the calibration plane.

[0012] Preferably, the distance between the calibration plane and the scribing positioning surface is 10 mm.

[0013] Preferably, a washer is fitted on the threaded rod, and when the locking nut is tightened, the locking nut presses the washer against the top surface of the first plate.

[0014] On the other hand, the present invention also proposes a scribing method for the mounting edge of an annular U-shaped cavity structure, which uses the above-mentioned scribing tool and includes the following steps:

[0015] S1. Assemble the scribing tool: Install the scribing block on the first plate of the support plate to obtain the scribing tool;

[0016] S2. Marking: Insert the first plate of the marking tool, along with the marking block, into the U-shaped cavity of the mounting edge, and make the inner side of the second plate of the support plate abut against the end face of the inner layer of the mounting edge to perform the marking operation.

[0017] Preferably, in step S1, the method for assembling the scribing tool is as follows: the threaded rod of the scribing block is inserted into the U-shaped groove of the first plate, and the square block of the scribing block is locked in the sliding stop of the first plate. The locking nut is not tightened first. The square block is slid on the sliding stop to adjust the position of the scribing block. When the distance A from the scribing tip on the scribing block to the inner wall of the second plate is equal to the installation depth L of the small diameter straight section of the connecting ring inserted into the U-shaped cavity of the mounting edge, the locking nut is tightened to secure the scribing block to the first plate.

[0018] Preferably, the method also includes step S3, calibrating the scribing tool: after the scribing tool has been used for a long time, the distance between the calibration plane on the scribing block and the scribing positioning surface of the second plate is calibrated using a vernier caliper to ensure that the distance is equal to the installation depth L of the small diameter straight section of the connecting ring being inserted into the U-shaped cavity of the mounting edge.

[0019] Preferably, in step S2, after scribing is completed and the scribing tool is withdrawn, the scribing tip of the scribing block is always kept separate from the outer circular wall surface of the inner layer of the mounting edge.

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

[0021] (1) By using the scribing tool provided by the present invention, when scribing, the first plate of the scribing tool together with the scribing block is inserted into the U-shaped cavity of the mounting edge, and the inner side of the second plate of the support plate abuts against the end face of the inner layer of the mounting edge, so that the scribing operation can be performed.

[0022] (2) The scribing tool provided by the present invention has a simple structure and is easy to use. In addition, the shape block on the scribing block is slidably engaged with the sliding stop on the first plate, and the distance from the scribing tip on the scribing block to the inner wall of the second plate can be adjusted according to actual needs.

[0023] (3) In this invention, the scribing block is installed on the first plate of the support plate in a detachable manner so that it can be replaced when the cone tip of the scribing block is worn.

[0024] (4) The marking tool provided by the present invention can be used not only in narrow spaces, but also in normal situations. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram showing the assembly relationship between the mounting edge and the connecting ring of the inner cone outer layer assembly of an aero-engine.

[0027] Figure 2 This is a front view of the drawing tool provided by the present invention;

[0028] Figure 3 A top view of the line drawing tool provided by the present invention;

[0029] Figure 4 Left view of the line drawing tool provided by the present invention;

[0030] Figure 5 A three-dimensional structural diagram of the drawing tool provided by the present invention;

[0031] Figure 6 This is a front view of the support plate in this invention;

[0032] Figure 7 This is a top view of the support plate in this invention;

[0033] Figure 8 This is a right view of the support plate in this invention;

[0034] Figure 9 This is the front view of the scribing block in this invention;

[0035] Figure 10 This is a three-dimensional structural diagram of the scribing block in this invention.

[0036] Explanation of reference numerals: 1. Support plate; 1a. First plate; 1b. Second plate; 1c. U-groove; 1d. Sliding stop; 1e. Scribing positioning surface; 2. Scribing block; 2a. Conical body; 2b. Square block; 2c. Threaded rod; 2d. Calibration plane; 3. Locking nut; 4. Washer; 100. Mounting edge; 200. Connecting ring. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0039] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0040] As shown in the accompanying drawings, this embodiment provides a scribing tool for mounting the edge of an annular U-shaped cavity structure, including a scribing block 2 and a support plate 1; the support plate 1 includes a first plate 1a and a second plate 1b vertically disposed at one end of the first plate 1a; the first plate 1a and the second plate 1b form an L-shaped support plate 1.

[0041] The scribing block 2 is installed on the first plate 1a; the distance A from the scribing tip on the scribing block 2 to the inner wall of the second plate 1b is equal to the installation depth L of the small-diameter straight section of the connecting ring 200 inserted into the U-shaped cavity of the mounting edge 100. Specifically, the installation depth L = 10 mm.

[0042] In this embodiment, a U-shaped groove 1c is provided on the first plate 1a; the scribing block 2 includes a square block 2b, a threaded rod 2c integrally formed on the top surface of the square block 2b, and a conical body 2a integrally formed on the bottom of the square block 2b, the bottom tip of the conical body 2a being the scribing tip; the threaded rod 2c of the scribing block 2 passes through the U-shaped groove 1c from bottom to top and is screwed with a locking nut 3.

[0043] Combination Figure 4 and Figure 8 As shown, a sliding stop 1d is provided on the side wall of the U-shaped groove 1c; the square block 2b of the scribing block 2 slides in conjunction with the sliding stop 1d.

[0044] Combination Figure 2 , Figure 9 As shown, the vertical side surface of the cone-shaped body 2a is coplanar with the end face of the square block 2b, forming a calibration plane 2d; the inner wall surface of the second plate 1b is set as a scribing positioning surface 1e; the calibration plane 2d and the scribing positioning surface 1e are parallel to each other; and the scribing tip on the scribing block 2 is located on the calibration plane 2d. Further, the distance between the calibration plane 2d and the scribing positioning surface 1e is 10mm.

[0045] In this embodiment, a washer 4 is fitted on the threaded rod 2c. When the locking nut 3 is tightened, the locking nut 3 presses the washer 4 against the top surface of the first plate 1a.

[0046] In this embodiment, the cone tip of the cone 2a is the scribing tip, which serves as the scribing working contact point. The hardness can be increased and wear reduced by adding a coating.

[0047] On the other hand, this embodiment also provides a scribing method for the mounting edge of an annular U-shaped cavity structure, which uses the above-mentioned scribing tool and includes the following steps:

[0048] S1. Assemble the scribing tool: Install the scribing block 2 on the first plate 1a of the support plate 1 to obtain the scribing tool;

[0049] S2. Marking: Insert the first plate 1a of the marking tool along with the marking block 2 into the U-shaped cavity of the mounting edge 100, and make the inner side of the second plate 1b of the support plate 1 abut against the end face D of the inner layer of the mounting edge 100. Lightly press the support plate 1 and the marking block 2 across the outer wall of the inner layer of the mounting edge 100 to obtain an assembly position line at a certain distance from the outer end face of the inner layer of the mounting edge 100.

[0050] In step S1, the method for assembling the scribing tool is as follows: the threaded rod 2c of the scribing block 2 is inserted into the U-shaped groove 1c of the first plate 1a, and the square block 2b of the scribing block 2 is locked in the sliding stop 1d of the first plate 1a. The locking nut 3 is not tightened first. The square block 2b is slid on the sliding stop 1d to adjust the position of the scribing block 2. When the distance A from the scribing tip on the scribing block 2 to the inner wall of the second plate 1b is equal to the installation depth L of the small diameter straight section of the connecting ring 200 inserted into the U-shaped cavity of the mounting edge 100, the locking nut 3 is tightened to secure the scribing block 2 to the first plate 1a.

[0051] In this embodiment, the scribing tool also includes step S3, calibrating the scribing tool: after the scribing tool has been used for a long time, the distance between the calibration plane 2d on the scribing block 2 and the scribing positioning surface 1e of the second plate 1b is calibrated using a vernier caliper to ensure that the distance is equal to the installation depth L of the small diameter straight section of the connecting ring 200 being inserted into the U-shaped cavity of the mounting edge 100.

[0052] In step S2, after the scribing is completed, when the scribing tool is withdrawn, the scribing tip of the scribing block 2 is always kept separate from the outer circular wall of the inner layer of the mounting edge 100 to avoid the scribing tip scratching the outer circular wall of the inner layer of the mounting edge 100 when the scribing tool is withdrawn.

[0053] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A scribing tool for a mounting edge of an annular U-shaped cavity structure, wherein the small-diameter straight section of the connecting ring (200) of the outer conical component of an aero-engine is inserted into the U-shaped cavity of the mounting edge (100), the mounting edge (100) having an annular U-shaped cavity structure, characterized in that, The marking tool includes a marking block (2) and a support plate (1); The support plate (1) includes a first plate (1a) and a second plate (1b) vertically disposed at one end of the first plate (1a); the first plate (1a) and the second plate (1b) form an L-shaped support plate (1); The marking block (2) is installed on the first plate (1a); The distance A from the scribing tip on the scribing block (2) to the inner wall of the second plate (1b) is equal to the installation depth L of the small diameter straight section of the connecting ring (200) being inserted into the U-shaped cavity of the mounting edge (100); A U-shaped groove (1c) is provided on the first plate (1a); the scribing block (2) includes a square block (2b), a threaded rod (2c) integrally formed on the top surface of the square block (2b), and a cone (2a) integrally formed on the bottom of the square block (2b), the bottom tip of the cone (2a) being the scribing tip; the threaded rod (2c) of the scribing block (2) passes through the U-shaped groove (1c) from bottom to top and is screwed with a locking nut (3); A sliding stop (1d) is provided on the side wall of the U-shaped groove (1c); the square block (2b) of the scribing block (2) slides in conjunction with the sliding stop (1d); The vertical side of the cone (2a) is coplanar with the end face of the square block (2b), forming a calibration plane (2d); the inner wall of the second plate (1b) is set as a scribing positioning surface (1e); the calibration plane (2d) and the scribing positioning surface (1e) are parallel to each other; and the scribing tip on the scribing block (2) is located on the calibration plane (2d).

2. The scribing tool for mounting edges of an annular U-shaped cavity structure as described in claim 1, characterized in that, The distance between the calibration plane (2d) and the scribing positioning surface (1e) is 10mm.

3. A scribing tool for mounting edges of an annular U-shaped cavity structure as described in claim 1, characterized in that, A washer (4) is fitted on the threaded rod (2c). When the locking nut (3) is tightened, the locking nut (3) presses the washer (4) against the top surface of the first plate (1a).

4. A scribing method for the mounting edge of an annular U-shaped cavity structure, characterized in that, Using the drawing tool according to any one of claims 1 to 3, the method includes the following steps: S1. Assemble the scribing tool: Install the scribing block (2) on the first plate (1a) of the support plate (1) to obtain the scribing tool; S2, scribing: Insert the first plate (1a) of the scribing tool along with the scribing block (2) into the U-shaped cavity of the mounting edge (100), and make the inner side of the second plate (1b) of the support plate (1) abut against the end face of the inner layer of the mounting edge (100) to perform the scribing operation.

5. The scribing method for the mounting edge of an annular U-shaped cavity structure as described in claim 4, characterized in that, In step S1, the method of assembling the scribing tool is as follows: insert the threaded rod (2c) of the scribing block (2) into the U-shaped groove (1c) of the first plate (1a), and make the square block (2b) of the scribing block (2) stuck in the sliding stop (1d) of the first plate (1a). Do not tighten the locking nut (3) first. Slide the square block (2b) on the sliding stop (1d) to adjust the position of the scribing block (2). Use a vernier caliper to determine that the distance A from the scribing tip on the scribing block (2) to the inner wall of the second plate (1b) is equal to the installation depth L of the small diameter straight section of the connecting ring (200) inserted into the U-shaped cavity of the mounting edge (100). Tighten the locking nut (3) to fasten the scribing block (2) onto the first plate (1a).

6. The scribing method for the mounting edge of an annular U-shaped cavity structure as described in claim 4, characterized in that, It also includes step S3, calibrating the scribing tool: after the scribing tool has been used for a long time, use a vernier caliper to calibrate the distance between the calibration plane (2d) on the scribing block (2) and the scribing positioning surface (1e) of the second plate (1b), and ensure that the distance is equal to the installation depth L of the small diameter straight section of the connecting ring (200) inserted into the U-shaped cavity of the mounting edge (100).

7. The scribing method for the mounting edge of an annular U-shaped cavity structure as described in claim 4, characterized in that, In step S2, after the scribing is completed, when the scribing tool is withdrawn, the scribing tip of the scribing block (2) is always separated from the outer circular wall of the inner layer of the mounting edge (100), and then the scribing tool is withdrawn.

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