Marking tool and method for mounting edge of annular U-shaped cavity structure

Abstract

The invention relates to the technical field of aero-engine assembly, in particular to a marking tool and method for an annular U-shaped cavity structure mounting edge. The marking tool comprises a marking block and a supporting 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 scribing block is mounted on the first plate body; and 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 mounting depth L of the small-diameter straight section of the connecting ring mounted in the U-shaped cavity of the mounting edge. The marking method comprises the steps that S1, the marking tool is assembled, specifically, the marking block is installed on the first plate body of the supporting plate, and the marking tool is obtained; and S2, scribing is conducted, specifically, a first plate body on a scribing tool and a scribing block extend into a U-shaped cavity of the mounting edge, the inner side face of a second plate body of a supporting plate abuts against the end face of the inner layer of the mounting edge, and then scribing operation can be conducted.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine assembly, and in particular to a marking tool and a method for a mounting edge of an annular U-shaped cavity structure. Background Art

[0002] Combination Figure 1 FIG. 1 is a schematic diagram of the assembly relationship between the mounting edge 100 and the connecting ring 200 of the inner cone outer layer assembly of an aircraft engine.

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

[0004] The connecting ring 200 is a thin-walled annular sheet metal part. The structure of the connecting ring 200 is two straight sections with a conical 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 requirements are: the small diameter straight section of the connecting ring 200 is installed in the U-shaped cavity of the mounting edge 100, the installation depth L = 10mm, and the inner circle of the small diameter straight section of the connecting ring 200 is placed on the inner outer circle of the mounting edge 100.

[0005] To ensure the installation depth L=10mm, before the small diameter straight section of the connecting ring 200 is installed into the U-shaped cavity of the mounting edge 100, an assembly position line must be drawn on the outer circular wall surface 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, the measuring claws of a vernier caliper or a height gauge are usually used to mark the assembly position line. However, since the installation edge 100 is a ring-shaped U-shaped cavity structure, the width of the U-shaped cavity is relatively narrow, and the marking position is deep, the measuring claws of the vernier caliper or the height gauge cannot reach into the U-shaped cavity and mark the line, resulting in the inability to accurately assemble the connecting ring 200 into place to meet the assembly requirements. Summary of the invention

[0007] The main purpose of the present invention is to provide a marking tool and method for the mounting edge of an annular U-shaped cavity structure, so as to solve the problem that the measuring claws of an ordinary vernier caliper or height gauge cannot be inserted into a narrow semi-enclosed cavity for marking.

[0008] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a marking tool for the mounting edge of an annular U-shaped cavity structure, comprising 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 installed on the first plate body; the distance A from the marking tip on the marking block to the inner wall of the second plate body 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.

[0009] Preferably, a U-shaped groove is provided on the first plate; the marking block includes a square block, a threaded rod integrally formed on the top surface of the square block, and a cone integrally formed at the bottom of the square block, and the bottom tip of the cone is a marking tip; the threaded rod of the marking 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 is slidably matched with the sliding stop.

[0011] Preferably, the vertical side surface of the cone is coplanar with the end surface of the square block, and together form a calibration plane; the inner wall surface of the second plate body 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 marking positioning surface is 10 mm.

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

[0014] On the other hand, the present invention also provides a marking method for the mounting edge of an annular U-shaped cavity structure, using the above-mentioned marking tool, comprising the following steps:

[0015] S1. Assembling the scribing tool: installing the scribing block on the first plate body of the support plate to obtain the scribing tool;

[0016] S2. Marking: Insert the first plate body and the marking block on the marking tool into the U-shaped cavity of the mounting edge, and make the inner side surface of the second plate body of the support plate abut against the end surface of the inner layer of the mounting edge, and then the marking operation can be performed.

[0017] Preferably, in step S1, the method for assembling the marking tool is: inserting the threaded rod of the marking block into the U-shaped groove of the first plate body, and making the square block of the marking block stuck in the sliding stop of the first plate body, without tightening the locking nut first, sliding the square block on the sliding stop to adjust the position of the marking block, and using a vernier caliper to determine that the distance A from the marking tip on the marking block to the inner wall 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, tighten the locking nut to fasten the marking block to the first plate body.

[0018] Preferably, step S3, calibrating the marking tool is also included: when the marking tool has been used for a long time, a vernier calibrator is used to calibrate the distance between the calibration plane on the marking block and the marking positioning surface of the second plate to ensure that the distance 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.

[0019] Preferably, in step S2, after the scribing is completed, when the scribing tool is withdrawn, it is ensured that the scribing tip of the scribing block is always separated 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 adopting the marking tool provided by the present invention, when marking, the first plate body on the marking tool together with the marking block is extended into the U-shaped cavity of the mounting edge, and the inner side surface of the second plate body of the support plate is abutted against the end surface of the inner layer of the mounting edge, and the marking 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 matched with the sliding stop on the first plate body, and the distance from the scribing tip on the scribing block to the inner wall of the second plate body can be adjusted according to actual needs.

[0023] (3) In the present invention, the scribing block is detachably mounted on the first plate body of the support plate, so that the scribing block can be replaced when the cone top is worn.

[0024] (4) The marking tool provided by the present invention can be used not only in narrow spaces but also in ordinary situations. 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 schematic diagram of the assembly relationship between the mounting edge and the connecting ring of the inner cone outer layer component of the aircraft engine;

[0027] Figure 2 A front view of the scribing tool provided by the present invention;

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

[0029] Figure 4 A left side view of the scribing tool provided by the present invention;

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

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

[0032] Figure 7 A top view of the support plate of the present invention;

[0033] Figure 8 It is a right side view of the support plate in the present invention;

[0034] Fig. 9 It is a front view of the scribing block in the present invention;

[0035] Fig.10 It is a three-dimensional structural diagram of the scribing block in the present invention.

[0036] Explanation of the accompanying drawings: 1. Support plate; 1a. First plate body; 1b. Second plate body; 1c. U-shaped 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 DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] As shown in the accompanying drawings, on the one hand, this embodiment provides a scribing tool for the mounting edge of an annular U-shaped cavity structure, comprising a scribing block 2 and a support plate 1; the support plate 1 comprises a first plate body 1a and a second plate body 1b vertically arranged at one end of the first plate body 1a; the first plate body 1a and the second plate body 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 of the scribing block 2 to the inner wall of the second plate 1b is equal to the installation depth L of the small straight section of the connecting ring 200 into the U-shaped cavity of the installation edge 100. Specifically, the installation depth L=10mm.

[0042] In this embodiment, a U-shaped groove 1c is opened on the first plate 1a; the marking 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 at the bottom of the square block 2b, and the bottom tip of the conical body 2a is a marking tip; the threaded rod 2c of the marking 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 is slidably matched with the sliding stop 1d.

[0044] Combination Figure 2 , Fig. 9 As shown, the vertical side surface of the cone 2a is coplanar with the end surface of the square block 2b, and together they form 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. Furthermore, the distance between the calibration plane 2d and the scribing positioning surface 1e is 10 mm.

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

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

[0047] On the other hand, the present embodiment further provides a method for marking the mounting edge of an annular U-shaped cavity structure, using the above-mentioned marking tool, comprising the following steps:

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

[0049] S2. Marking: Extend the first plate body 1a on the marking tool together with the marking block 2 into the U-shaped cavity of the mounting edge 100, and make the inner side surface of the second plate body 1b of the support plate 1 against the end surface D of the inner layer of the mounting edge 100. Lightly press the support plate 1 and the marking block 2 to mark the outer wall surface of the inner layer of the mounting edge 100, and you can get an assembly position line that is a certain distance away from the outer end surface of the inner layer of the mounting edge 100.

[0050] In step S1, the method for assembling the marking tool is: insert the threaded rod 2c of the marking block 2 into the U-shaped groove 1c of the first plate body 1a, and make the square block 2b of the marking block 2 stuck in the sliding stop 1d of the first plate body 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 marking block 2, use a vernier caliper to determine that the distance A from the marking tip on the marking block 2 to the inner wall surface of the second plate body 1b is equal to the installation depth L of the small straight section of the connecting ring 200 installed in the U-shaped cavity of the mounting edge 100, then tighten the locking nut 3 to fasten the marking block 2 to the first plate body 1a.

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

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

[0053] 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 marking tool for the mounting edge of an annular U-shaped cavity structure, characterized in that: It comprises a marking block (2) and a support plate (1); The support plate (1) comprises a first plate body (1a) and a second plate body (1b) vertically arranged at one end of the first plate body (1a); the first plate body (1a) and the second plate body (1b) form an L-shaped support plate (1); The scribing block (2) is mounted on the first plate (1a); The distance A from the scribing tip on the scribing block (2) to the inner wall surface of the second plate body (1b) is equal to the installation depth L of the small straight section of the connecting ring (200) installed in the U-shaped cavity of the installation edge (100).

2. A marking tool for mounting edge of an annular U-shaped cavity structure as claimed in claim 1, characterized in that: A U-shaped groove (1c) is provided on the first plate body (1a); The scribing block (2) comprises 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), wherein the bottom tip of the cone (2a) is a scribing tip; The threaded rod (2c) of the marking block (2) passes through the U-shaped groove (1c) from bottom to top and is then screwed with a locking nut (3).

3. A marking tool for the mounting edge of an annular U-shaped cavity structure as claimed in claim 2, characterized in that: A sliding stop (1d) is provided on the side wall of the U-shaped groove (1c); the square block (2b) of the marking block (2) is slidably matched with the sliding stop (1d).

4. A marking tool for mounting edge of an annular U-shaped cavity structure as claimed in claim 2, characterized in that: The vertical side surface of the conical body (2a) is coplanar with the end surface of the square block (2b), and together they form a calibration plane (2d); the inner wall surface of the second plate body (1b) is arranged 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).

5. A marking tool for the mounting edge of an annular U-shaped cavity structure as claimed in claim 4, characterized in that: The distance between the calibration plane (2d) and the marking positioning surface (1e) is 10 mm.

6. A marking tool for mounting edge of an annular U-shaped cavity structure as claimed in claim 2, characterized in that: A washer (4) is sleeved on the threaded rod (2c); when the locking nut (3) is locked, the locking nut (3) presses the washer (4) against the top surface of the first plate body (1a).

7. A marking method for the mounting edge of an annular U-shaped cavity structure, characterized in that: Using the scribing tool according to any one of claims 1 to 6, comprising the following steps: S1. Assembling a marking tool: installing a marking block (2) on a first plate body (1a) of a support plate (1) to obtain a marking tool; S2. Marking: The first plate body (1a) on the marking tool together with the marking block (2) is extended into the U-shaped cavity of the mounting edge (100), and the inner side surface of the second plate body (1b) of the support plate (1) is placed against the end surface of the inner layer of the mounting edge (100), and the marking operation can be performed.

8. A marking method for the mounting edge of an annular U-shaped cavity structure as claimed in claim 7, characterized in that: In step S1, the method for assembling the marking tool is as follows: inserting the threaded rod (2c) of the marking block (2) into the U-shaped groove (1c) of the first plate body (1a), and making the square block (2b) of the marking block (2) stuck in the sliding stop (1d) of the first plate body (1a), without tightening the locking nut (3) first, sliding the square block (2b) on the sliding stop (1d) to adjust the position of the marking block (2), and using a vernier caliper to determine when the distance A from the marking tip on the marking block (2) to the inner wall surface of the second plate body (1b) is equal to the installation depth L of the small straight section of the connecting ring (200) installed in the U-shaped cavity of the installation edge (100), tightening the locking nut (3) to fasten the marking block (2) to the first plate body (1a).

9. A method for marking the mounting edge of an annular U-shaped cavity structure according to claim 7, characterized in that: The method further comprises step S3, calibrating the marking tool: when the marking tool has been used for a long time, a vernier calibrator is used to calibrate the distance between the calibration plane (2d) on the marking block (2) and the marking positioning surface (1e) of the second plate body (1b), so as to ensure that the distance is equal to the installation depth L of the small straight section of the connecting ring (200) installed in the U-shaped cavity of the installation edge (100).

10. A marking method for the mounting edge of an annular U-shaped cavity structure according to claim 7, characterized in that: In step S2, after the scribing is completed, when the scribing tool is withdrawn, it is ensured that the scribing tip of the scribing block (2) is always separated from the outer circular wall surface of the inner layer of the mounting edge (100), and then the scribing tool is withdrawn.

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