An angular positioning tool and method for welding an aeroengine barrel case

Abstract

The present application relates to the field of combined welding of aero-engine cylinder casing parts, and particularly relates to an angular positioning tool and method for aero-engine cylinder casing welding. The angular positioning tool comprises a fixed plate and a positioning plate. A clamping groove is formed in the fixed plate. A first positioning column and two second positioning columns are arranged on the front surface of the fixed plate. The first positioning column is used for being inserted into an angular hole of a middle mounting edge. The second positioning columns are used for being inserted into mounting holes of the middle mounting edge. The positioning plate is clamped in the clamping groove. The two ends of the positioning plate are respectively inclined downward, and limiting notches are arranged at the two ends of the positioning plate respectively. The limiting notches are used for being clamped on the reinforcing ribs of the front section of the casing shell and the rear section of the casing shell. The center plane of the limiting notches is coplanar with the center line of the first positioning column. The tool can quickly and accurately realize angular positioning of parts, ensure the consistency of the angular position of each part after welding, and ensure the stability of the angular quality of the parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of combined welding of aero-engine cylinder case parts, and particularly relates to an angular positioning tool and method for aero-engine cylinder case welding. BACKGROUND

[0002] The cylinder case parts are mainly connected by welding process through a front mounting edge, a case shell front section, a middle mounting edge, a case shell rear section and a rear mounting edge, and the joint form is butt joint. The case shell front section and the case shell rear section are equal-thickness cylinders, and long strip-shaped reinforcing ribs are uniformly distributed along the circumference. The number of reinforcing ribs of the front section and the rear section is the same, the distribution angle is the same, and the reinforcing ribs are in the axial direction of the case. In the welding process, a special welding tool is usually used to constrain the butt joint to ensure the quality of the welding joint. In the case where the welding tool does not have angular positioning function, the positioning welding is usually performed by scribing.

[0003] Figure 1 The figure is a schematic diagram of a typical cylinder case part of an aero-engine. The case is in a cylindrical structure, and is mainly connected by welding process through a front mounting edge 1, a case shell front section 2, a middle mounting edge 3, a case shell rear section 4 and a rear mounting edge 5, and the joint form is butt joint. Figure 1 The middle a, b, c and d represent welds. The case shell front section 2 and the case shell rear section 4 are equal-thickness cylinders, and long strip-shaped reinforcing ribs are uniformly distributed along the circumference. The number of reinforcing ribs of the front section and the rear section is the same, the distribution angle is the same, and the reinforcing ribs are in the axial direction of the case. The center lines of the angular holes 3a on the middle mounting edge 3 are coplanar with the reinforcing ribs at the corresponding positions of the case shell front section 2 and the case shell rear section 4.

[0004] When the case shell front section 2, the middle mounting edge 3 and the case shell rear section 4 are welded, the existing problem is that there is an assembly angular requirement before the parts are combined and welded, that is, the center lines of the angular holes 3a on the middle mounting edge 3 are coplanar with the reinforcing ribs at the corresponding positions of the case shell front section 2 and the case shell rear section 4. When welding, the welding tool is used to expand the welding part to meet the welding requirements and ensure the welding quality. However, the welding tool currently used does not have angular positioning function. Before welding, the center lines of the angular holes 3a, the reinforcing ribs of the case shell front section 2 and the reinforcing ribs of the case shell rear section 4 are generally ensured to be in the same plane by scribing. It is inevitable that the scribing will have different deviations due to the personal skill level of the operator, which will eventually lead to the deviation of the above three from the theoretical plane after welding. When the parts are mass-produced, the angularity will be inconsistent, the part quality will be unstable, and the deviation will be serious, which will lead to the subsequent processing of the parts and even scrap. SUMMARY

[0005] The main purpose of the present application is to provide an angular positioning tool and method for the welding of an aero-engine cylinder case, which ensures that the angular holes of the front section of the case shell, the rear section of the case shell and the middle mounting edge meet the angular requirements after welding.

[0006] To achieve the above-mentioned purpose, in one aspect, the present application provides an angular positioning tool for the welding of an aero-engine cylinder case, comprising a fixed plate and a positioning plate; a clamping groove is formed on the fixed plate; a first positioning column and two second positioning columns are arranged on the front surface of the fixed plate; the first positioning column is used for being inserted into the angular hole of the middle mounting edge; the second positioning column is used for being inserted into the mounting hole of the middle mounting edge; the positioning plate is clamped in the clamping groove; the two ends of the positioning plate are respectively inclined downward, and a limiting slot is arranged at the two ends of the positioning plate, which is used for being clamped on the reinforcing ribs of the front section of the case shell and the rear section of the case shell; the center plane of the limiting slot is coplanar with the center line of the first positioning column.

[0007] Preferably, the center plane of the clamping groove is coplanar with the center line of the first positioning column; and the center plane of the limiting slot is coplanar with the positioning plate.

[0008] Preferably, the two second positioning columns are respectively located on the two sides of the first positioning column.

[0009] Preferably, a protruding block is integrally formed on the top surface of the positioning plate, and the clamping groove is formed on the protruding block of the positioning plate.

[0010] Preferably, the lower surface of the fixed plate is a circular arc surface, and when the fixed plate is assembled to the middle mounting edge through the first positioning column and the second positioning column, the lower surface of the fixed plate is attached to the outer peripheral surface of the middle mounting edge.

[0011] Preferably, the positioning plate and the clamping groove are in transition fit.

[0012] Preferably, the limiting slot and the reinforcing ribs of the front section of the case shell and the rear section of the case shell form a transition fit.

[0013] Preferably, the first positioning column and the second positioning column are connected with the positioning plate in a welded manner, or the first positioning column and the second positioning column are integrally formed with the fixed plate.

[0014] Preferably, the first positioning column is in transition fit with the angular hole of the middle mounting edge; and the second positioning column is in transition fit with the mounting hole of the middle mounting edge.

[0015] In another aspect, the present application further provides an angular positioning method for the welding of an aero-engine cylinder case, which adopts the above-mentioned angular positioning tool and comprises the following steps:

[0016] S1, place the front mounting edge, the front section of the casing shell, the middle mounting edge, the rear section of the casing shell and the rear mounting edge on the welding tool in sequence;

[0017] S2, install the fixed plate to the middle mounting edge, so that the first positioning column is inserted into the corner hole of the middle mounting edge, and the second positioning column is inserted into the mounting hole of the middle mounting edge;

[0018] S3, clamp the positioning plate in the clamping groove of the fixed plate, and rotate the front section of the casing shell and the rear section of the casing shell, so that the reinforcing ribs on the front section of the casing shell and the rear section of the casing shell are clamped into the limiting slot of the positioning plate, thereby completing the corner positioning of the front section of the casing shell, the middle mounting edge and the rear section of the casing shell.

[0019] Due to the adoption of the above technical scheme, the beneficial effects of the present application are as follows:

[0020] (1) By adopting the corner positioning tool and method provided by the present application, when corner positioning is performed, the fixed plate is installed to the middle mounting edge, so that the first positioning column is inserted into the corner hole of the middle mounting edge, and the second positioning column is inserted into the mounting hole of the middle mounting edge, the positioning plate is clamped in the clamping groove of the fixed plate, and the front section of the casing shell and the rear section of the casing shell are rotated, so that the reinforcing ribs on the front section of the casing shell and the rear section of the casing shell are clamped into the limiting slot of the positioning plate, thereby completing the corner positioning of the front section of the casing shell, the middle mounting edge and the rear section of the casing shell.

[0021] (2) The corner positioning tool provided by the present application has simple structure and convenient use, and can quickly and accurately realize corner positioning of parts, ensure the consistency of the corner of each part after welding, and ensure the stability of the corner quality of the parts. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0023] Figure 1 It is a schematic view of a typical cylindrical casing part of an aero-engine;

[0024] Figure 2 It is a structural schematic view of the corner positioning tool provided by the present application;

[0025] Figure 3 It is a schematic view of the use state of the corner positioning tool provided by the present application.

[0026] Explanation of reference numerals: 1, front mounting edge; 2, front section of casing shell; 3, middle mounting edge; 3a, angular hole; 3b, mounting hole; 4, rear section of casing shell; 5, rear mounting edge; 6, fixing plate; 6a, protruding block; 6b, clamping groove; 7, positioning plate; 7a, limiting notch; 8, first positioning column; 9, second positioning column. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0029] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that the technical solutions can be realized by those skilled in the art, and when the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0030] Combination Figure 2 As shown in the drawings, a specific embodiment of an angular positioning tool for welding an aero-engine cylinder casing is provided by the present application, which comprises a fixing plate 6 and a positioning plate 7; a clamping groove 6b is formed on the fixing plate 6; a first positioning column 8 and two second positioning columns 9 are arranged on the front surface of the fixing plate 6; the first positioning column 8 is used to be inserted into the angular hole 3a of the middle mounting edge 3; the second positioning column 9 is used to be inserted into the mounting hole 3b of the middle mounting edge 3; the positioning plate 7 is clamped in the clamping groove 6b; both ends of the positioning plate 7 are respectively inclined downward, and limiting notches 7a are arranged at both ends of the positioning plate 7, respectively, the limiting notches 7a are used to be clamped on the reinforcing ribs of the front section of casing shell 2 and the rear section of casing shell 4; the center plane of the limiting notches 7a is coplanar with the center line of the first positioning column 8.

[0031] In the embodiment, the hole diameter and circumferential distribution position of the angular hole 3a on the position tool of the first positioning column 8 and the second positioning column 9 and the two mounting holes 3b are designed and manufactured, and the two second positioning columns 9 are respectively located on the two sides of the first positioning column 8. In use, the second positioning column 9 is inserted into the mounting holes 3b on the left and right sides of the angular hole 3a.

[0032] Further, the symmetric center plane of the clamping groove 6b is coplanar with the center line of the first positioning column 8; and the limiting notch 7a is coplanar with the symmetric center plane of the positioning plate 7.

[0033] In combination Figure 2 As shown, the protruding block 6a is integrally formed on the top surface of the fixing plate 6, and the clamping groove 6b is formed on the protruding block 6a of the fixing plate 6. The integrally formed manner facilitates the overall machining of the fixing plate 6 and the protruding block 6a.

[0034] In the embodiment, the lower surface of the fixing plate 6 is a circular arc surface, and when the fixing plate 6 is assembled to the middle mounting edge 3 through the first positioning column 8 and the second positioning column 9, the lower surface of the fixing plate 6 is attached to the outer circumferential surface of the middle mounting edge 3, so as to ensure that the fixing plate 6 can be stably mounted on the middle mounting edge 3 and avoid radial movement.

[0035] In the embodiment, the positioning plate 7 and the clamping groove 6b are in transition fit. The limiting notch 7a is in transition fit with the reinforcing ribs on the front section 2 and the rear section 4 of the casing shell. The first positioning column 8 is in transition fit with the angular hole 3a of the middle mounting edge 3; and the second positioning column 9 is in transition fit with the mounting hole 3b of the middle mounting edge 3. Transition fit is suitable for occasions requiring precise positioning, because it allows a certain gap to facilitate assembly and adjustment, and also allows a certain interference to ensure the stability of the connection.

[0036] In combination Figure 2 As shown, the first positioning column 8 and the second positioning column 9 are connected with the fixing plate 6 in a welding manner. Alternatively, the first positioning column 8 and the second positioning column 9 are integrally formed with the fixing plate 6.

[0037] In combination Figure 3 As shown, the embodiment also provides an angular positioning method for welding of an aero-engine cylinder casing, which adopts the above angular positioning tool and includes the following steps:

[0038] S1, the front mounting edge 1, the casing shell front section 2, the middle mounting edge 3, the casing shell rear section 4 and the rear mounting edge 5 are placed on the welding tool in sequence; the welding tool is a conventional prior art, which will not be described here.

[0039] S2, install the fixed plate 6 to the middle installation edge 3, so that the first positioning column 8 is inserted in the corner hole 3a of the middle installation edge 3, and the second positioning column 9 is inserted in the installation hole 3b of the middle installation edge 3.

[0040] S3, the positioning plate 7 is clamped in the clamping groove 6a of the fixed plate 6, and the front section 2 of the casing shell and the rear section 4 of the casing shell are rotated, so that the reinforcing ribs on the front section 2 of the casing shell and the rear section 4 of the casing shell are clamped into the limiting slot 7a of the positioning plate 7 respectively, that is, the angular positioning of the front section 2 of the casing shell, the middle installation edge 3 and the rear section 4 of the casing shell is completed.

[0041] After the angular positioning is completed by using the above method, the casing can be normally welded.

[0042] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields under the inventive concept of the present application, and the contents of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. An angular positioning tool for welding the casing of an aircraft engine, characterized in that, Includes a fixing plate (6) and a positioning plate (7); a slot (6b) is provided on the fixing plate (6); a first positioning post (8) and two second positioning posts (9) are provided on the front side of the fixing plate (6); the first positioning post (8) is used to be inserted into the corner hole (3a) of the middle mounting edge (3); the second positioning post (9) is used to be inserted into the mounting hole (3b) of the middle mounting edge (3); the positioning plate (7) is locked in the slot (6b); the two ends of the positioning plate (7) are inclined downwards respectively, and a limiting slot (7a) is provided at the two ends of the positioning plate (7) respectively, the limiting slot (7a) is used to be locked on the reinforcing ribs of the front section (2) and the rear section (4) of the casing; the symmetrical center plane of the limiting slot (7a) is coplanar with the center line of the first positioning post (8); The symmetrical center plane of the slot (6b) is coplanar with the center line of the first positioning post (8); the limiting slot (7a) is coplanar with the symmetrical center plane of the positioning plate (7); The lower surface of the fixing plate (6) is an arc surface. When the fixing plate (6) is assembled onto the middle mounting edge (3) through the first positioning post (8) and the second positioning post (9), the lower surface of the fixing plate (6) is attached to the outer peripheral surface of the middle mounting edge (3).

2. The angular positioning tool for welding an aero-engine casing as described in claim 1, characterized in that, The two second positioning posts (9) are located on both sides of the first positioning post (8).

3. The angular positioning tool for welding an aero-engine casing as described in claim 1, characterized in that, A protrusion (6a) is integrally formed on the top surface of the fixing plate (6), and the slot (6b) is formed on the protrusion (6a) of the fixing plate (6).

4. The angular positioning tool for welding an aero-engine casing as described in claim 1, characterized in that, The positioning plate (7) and the slot (6b) are in a transition fit.

5. The angular positioning tool for welding an aero-engine casing as described in claim 1, characterized in that, The limiting slot (7a) forms a transition fit with the reinforcing ribs of the front section (2) and rear section (4) of the casing.

6. The angular positioning tool for welding an aero-engine casing as described in claim 1, characterized in that, The first positioning post (8) and the second positioning post (9) are connected to the fixing plate (6) by welding, or the first positioning post (8), the second positioning post (9) and the fixing plate (6) are integrally formed.

7. The angular positioning tool for welding an aero-engine casing as described in claim 1, characterized in that, The first positioning post (8) transitions to the corner hole (3a) of the middle mounting edge (3); the second positioning post (9) transitions to the mounting hole (3b) of the middle mounting edge (3).

8. A method for angular positioning during welding of an aero-engine casing, characterized in that, The angular positioning tool according to any one of claims 1 to 7 comprises the following steps: S1. Place the front mounting edge (1), the front section of the casing (2), the middle mounting edge (3), the rear section of the casing (4), and the rear mounting edge (5) on the welding fixture in sequence; S2. Install the fixing plate (6) onto the middle mounting edge (3) so that the first positioning post (8) is inserted into the corner hole (3a) of the middle mounting edge (3) and the second positioning post (9) is inserted into the mounting hole (3b) of the middle mounting edge (3); S3. Place the positioning plate (7) into the slot (6b) of the fixing plate (6), rotate the front section (2) and rear section (4) of the casing housing, so that the reinforcing ribs on the front section (2) and rear section (4) of the casing housing respectively engage in the limiting slot (7a) of the positioning plate (7), thereby completing the angular positioning of the front section (2), the middle mounting edge (3) and the rear section (4) of the casing housing.

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