Aero-engine combustion chamber inner shell flange welding maintenance clamp

Abstract

The utility model discloses an aero-engine combustion chamber inner shell flange welding maintenance clamp. The aero-engine combustion chamber inner shell flange welding maintenance clamp comprises a base, a supporting column, a fixing plate, a supporting plate and a pressing plate. The upper end of the base protrudes upwards to form a limiting step matched with a workpiece, a supporting column is vertically and detachably assembled in the middle of the base, a fixing plate is horizontally, coaxially and fixedly arranged at the top of the supporting column, and a supporting plate used for supporting the workpiece is detachably, horizontally, coaxially and fixedly arranged at the upper end of the fixing plate through a fixing assembly. A pressing plate capable of abutting against a workpiece is detachably, horizontally and fixedly arranged above the supporting plate. The aero-engine combustion chamber inner shell flange welding maintenance clamp is simple in structure, low in cost and stable in clamping, and parts of the aero-engine combustion chamber inner shell flange welding maintenance clamp can be conveniently replaced.

Description

Technical Field

[0001] This utility model relates to the field of maintenance fixtures, specifically to a welding and maintenance fixture for the flange of the combustion chamber shell of an aero-engine. Background Technology

[0002] An aero-engine is a highly complex and precise thermodynamic machine. As the heart of an aircraft, it not only powers the aircraft's flight but also serves as a crucial driving force for the development of the aviation industry. Every major transformation in the history of human aviation has been inseparable from the technological advancements in aero-engines.

[0003] Engine components require regular maintenance to ensure safe takeoff and landing for each aircraft. During maintenance of the engine casing, clamps are needed to hold the engine for easy access by maintenance personnel. However, existing clamps are complex in structure and expensive to manufacture, increasing operating costs.

[0004] Therefore, providing a welding and maintenance fixture for the flange of the combustion chamber shell of an aero-engine that is simple in structure, low in cost, stable in clamping, and convenient for replacing its own components is a problem that this utility model urgently needs to solve. Utility Model Content

[0005] To address the aforementioned technical problems, the purpose of this utility model is to overcome the issues of complex fixture structures, high manufacturing costs, and increased usage costs in the existing technology. This invention provides a simple, low-cost, stable clamping fixture for welding and repairing the flange of the combustion chamber shell of an aero-engine, which facilitates the replacement of its own components.

[0006] To achieve the above objectives, this utility model provides a welding and maintenance fixture for the flange of the combustion chamber of an aero-engine, the fixture comprising: a base, a support column, a fixing plate, a support plate, and a pressure plate;

[0007] The upper part of the base protrudes upward to form a limiting step that matches the workpiece. A support column is vertically and detachably mounted in the middle of the base. A fixing plate is horizontally and coaxially fixed at the top of the support column. A support plate for supporting the workpiece is detachably and horizontally fixed at the upper end of the fixing plate through a fixing component. A pressure plate that can abut against the workpiece is detachably and horizontally fixed above the support plate.

[0008] Preferably, the support column has a hollow structure inside, and its upper and lower ends extend horizontally outward to form a lower extension and an upper extension, respectively. The lower extension of the support column is detachably assembled onto the base by a number of No. 1 fasteners.

[0009] Preferably, the lower extension is provided with several threaded holes of number one at equal intervals along its circumference, which are used to cooperate with several number one fasteners. The base is provided with several through holes of number one at equal intervals along its circumference, which correspond one-to-one with all the threaded holes of number one. All the number one fasteners pass through all the through holes of number one and are screwed into their respective threaded holes of number one.

[0010] Preferably, the fixing plate is detachably mounted on the upper extension by a plurality of No. 2 fasteners; wherein,

[0011] The center of the bottom of the fixing plate protrudes downward to form a limiting part that can be inserted into the support column. The fixing plate has several No. 2 threaded holes that are equally spaced vertically along its circumference and are adapted to several No. 2 fasteners. The upper extension has several No. 2 through holes that are equally spaced vertically along its circumference and correspond one-to-one with all the No. 2 threaded holes. All the No. 2 fasteners pass through all the No. 2 through holes and are screwed onto their respective No. 2 threaded holes.

[0012] Preferably, the fixing assembly includes: a transition plate, a wedge block, and a cover plate; wherein,

[0013] The upper end of the fixed plate has a horizontal and coaxially detachable transition plate. The diameter of the transition plate is larger than that of the fixed plate. The fixed plate has a vertically penetrating positioning hole in the middle. The middle of the transition plate has a vertically penetrating wedge-shaped positioning cavity with an inverted frustum structure that matches the wedge block. A wedge block that can move vertically up and down in the positioning cavity is provided below the cover plate that abuts against the transition plate. The center of the bottom end of the wedge block extends downward to form a positioning protrusion that can be inserted into the positioning hole. The transition plate and the cover plate are both detachably fixed to the fixed plate by a number 3 fastener.

[0014] Preferably, the bottom portion of the cover plate is recessed inward to form a cavity that matches the wedge block, and a limiting hole is vertically opened through the top of the cavity. A limiting post that can pass through the limiting hole is vertically fixedly provided on the top of the wedge block, and a limiting cap with a diameter larger than the limiting hole is fixedly provided on the top of the limiting post that passes through the limiting hole.

[0015] Preferably, the transition plate and the cover plate are vertically perforated at equal intervals along their circumference with a plurality of No. 3 through holes corresponding to all the No. 3 fasteners, and the fixing plate is vertically perforated at equal intervals along its circumference with a plurality of No. 3 threaded holes corresponding to all the No. 3 through holes on the transition plate and the cover plate, and all the No. 3 fasteners pass through all the No. 3 through holes on all the cover plates and the transition plate in sequence and are screwed into their respective No. 3 threaded holes.

[0016] Preferably, the bottom of the wedge block is provided with a plurality of first-order assembly grooves at equal intervals and uniformly arranged along its circumference, and each of the first-order assembly grooves is vertically fixedly provided with a first-order spring that can abut against the fixed plate. The bottom end of the cover plate is provided with a plurality of second-order assembly grooves at equal intervals along its circumference, and each of the second-order assembly grooves is vertically fixedly provided with a second-order spring that can abut against the fixed plate.

[0017] Preferably, the pressure plate is detachably assembled to the support plate by a plurality of No. 4 fasteners; wherein,

[0018] The pressure plate has several No. 4 through holes that are equally spaced and vertically penetrated along its circumference and are adapted to all the No. 4 fasteners. The support plate has several No. 4 threaded holes that are equally spaced and vertically penetrated along its circumference and correspond one-to-one with all the No. 4 through holes. All the No. 4 fasteners pass through all the No. 4 through holes and are screwed into their respective No. 4 threaded holes.

[0019] According to the above technical solution, the beneficial effects of the welding and maintenance fixture for the combustion chamber flange of the aero-engine provided by this utility model in use are as follows:

[0020] The workpiece is vertically placed on the base, with its bottom inner wall abutting against the limiting step on the base, and its top inner wall resting on the support plate. The limiting step and the support plate provide support and limitation. Finally, a pressure plate secures the workpiece to the support plate, clamping and fixing its top between them to prevent displacement during maintenance and improving the stability and reliability of the entire fixture. This fixture has a simple structure, low manufacturing cost, and is economical.

[0021] In summary, the maintenance fixture provided by this utility model has a simple structure, low cost, stable clamping, and is easy to replace.

[0022] Other features and advantages of this utility model will be described in detail in the following detailed description section; and all parts not covered in this utility model are the same as or can be implemented using existing technology. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure of a welding and maintenance fixture for the combustion chamber shell flange of an aero-engine provided in a preferred embodiment of this utility model;

[0025] Figure 2 This is a top view of the structure of the welding and maintenance fixture for the combustion chamber flange of an aero-engine provided in a preferred embodiment of the present invention;

[0026] Figure 3 yes Figure 2 A schematic diagram of the structure along the FZ-FZ direction;

[0027] Figure 4 This is a schematic diagram of the structure of the welding and maintenance fixture for the combustion chamber flange of an aero-engine provided in a preferred embodiment of the present invention at a certain moment during the clamping process of the workpiece.

[0028] Explanation of reference numerals in the attached figures

[0029] 1. Base; 2. Support column; 3. Fixing plate; 4. Transition plate; 5. Support plate; 6. Pressure plate; 7. Wedge block; 8. Cover plate; 9. Spring No. 1; 10. Spring No. 2; 11. Limiting step; 12. Fastener No. 1; 13. Fastener No. 2; 14. Fastener No. 3; 15. Fastener No. 2; 16. Limiting column. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0031] like Figure 1-4 As shown, this utility model provides a welding and maintenance fixture for the flange of the combustion chamber of an aero-engine. The fixture includes: a base 1, a support column 2, a fixing plate 3, a support plate 5, and a pressure plate 6.

[0032] The upper part of the base 1 protrudes upward to form a limiting step 11 that is adapted to the workpiece. The middle part of the base 1 is vertically and detachably equipped with a support column 2. The top of the support column 2 is horizontally and coaxially fixedly provided with a fixing plate 3. The upper end of the fixing plate 3 is detachably and horizontally and coaxially fixedly provided with a support plate 5 for supporting the workpiece through a fixing component. A pressure plate 6 that can abut against the workpiece is detachably and horizontally fixedly provided above the support plate 5.

[0033] In the above scheme, the side wall of the support plate 5 can abut against the inner wall of the top of the workpiece to limit its position, and the base 1 has a number of fixing holes evenly spaced along its circumference so that the entire fixture can be fixed at the work position to be installed through the fixing holes.

[0034] When using, such as Figure 4 As shown, the workpiece is vertically placed on the base 1. The inner wall of the bottom end of the workpiece can abut against the limiting step 1 on the base 1, while the inner wall of the top end of the workpiece rests on the support plate 5. The workpiece is supported and limited by the limiting step 11 and the support plate 5. Finally, the workpiece is fixed to the support plate 5 by the pressure plate 6. The top end of the workpiece is clamped and fixed between the pressure plate 6 and the support plate 5 to prevent the workpiece from shifting during maintenance, thereby improving the stability and reliability of the entire fixture in clamping the workpiece.

[0035] In addition, the fixture has a simple structure and low manufacturing cost, which improves its economic efficiency.

[0036] In a preferred embodiment of the present invention, the support column 2 has a hollow structure inside, and its upper and lower ends extend horizontally outward to form a lower extension and an upper extension, respectively. The lower extension of the support column 2 is detachably assembled onto the base 1 by a number of fasteners 12.

[0037] In a preferred embodiment of this utility model, the lower extension is provided with a plurality of threaded holes of number one at equal intervals along its circumference, which are used to cooperate with a plurality of number one fasteners 12. The base 1 is provided with a plurality of through holes of number one at equal intervals along its circumference, which correspond one-to-one with all the threaded holes of number one. All the fasteners of number one pass through all the through holes of number one and are screwed into their respective threaded holes of number one.

[0038] In the above scheme, when in use, the support column 2 is placed vertically on the base 1, and all the first threaded holes on the lower extension at the bottom end of the support column 2 correspond one-to-one with all the first through holes on the base 1. Then, all the first fasteners 12 are passed through all the first through holes and screwed into the corresponding first threaded holes on the base 1 to fix the support column 2.

[0039] In a preferred embodiment of this utility model, the fixing plate 3 is detachably mounted on the upper extension by a plurality of second-order fasteners 13; wherein,

[0040] The center of the bottom of the fixing plate 3 protrudes downward to form a limiting part that can be inserted into the support column 2. The fixing plate 3 has several No. 2 threaded holes that are equally spaced vertically along its circumference and are adapted to several No. 2 fasteners 13. The upper extension has several No. 2 through holes that are equally spaced vertically along its circumference and correspond one-to-one with all the No. 2 threaded holes. All the No. 2 fasteners 13 pass through all the No. 2 through holes and are screwed onto their respective No. 2 threaded holes.

[0041] In the above scheme, during assembly, the fixing plate 3 is placed horizontally on the support column 2, and the limiting part of the fixing plate 3 extends into the support column 2 from the top to limit the fixing plate 3. The position of the fixing plate 3 is adjusted so that all the second threaded holes on the fixing plate 3 correspond one-to-one with all the second through holes on the upper extension. Then, all the second fasteners 13 are passed through all the second through holes and screwed into the corresponding second threaded holes on the fixing plate 3 to fix the fixing plate 3.

[0042] In a preferred embodiment of this utility model, the fixing component includes: a transition plate 4, a wedge block 7, and a cover plate 8; wherein,

[0043] The upper end of the fixed plate 3 is horizontally and coaxially detachably provided with a transition plate 4. The diameter of the transition plate 4 is larger than that of the fixed plate 3. The fixed plate 3 has a vertically penetrating positioning hole in the middle. The transition plate 4 has a vertically penetrating wedge-shaped positioning cavity with an inverted frustum structure that is adapted to the wedge block 7. The wedge block 7, which can be vertically raised and lowered in the positioning cavity, is provided below the cover plate 8 that abuts against the transition plate 4. The center of the bottom end of the wedge block 7 extends downward to form a positioning protrusion that can be inserted into the positioning hole. The transition plate 4 and the cover plate 8 are both detachably fixed to the fixed plate 3 by a number of No. 3 fasteners 14.

[0044] In the above scheme, such as Figure 3 and Figure 4 As shown, from bottom to top, the diameter of the fixing plate 3 is smaller than the diameter of the transition plate 4, and the diameter of the transition plate 3 is smaller than the diameter of the support plate 5 (here, diameter refers to the outer diameter of each component). This is done to increase the support strength of the support plate 5 through the transition plate 4. Similarly, the fixing plate 3 is used to increase the support strength of the transition plate 4.

[0045] Reason: The larger the diameter of the fixing plate 3, the farther the fixing point between the fixing plate 3 and the support column 2 becomes, thus reducing the supporting strength of the fixing plate 3 (the same applies to the transition plate 4). If the diameter of the fixing plate 3 remains constant, when the diameter of the transition plate 4 is less than or equal to the diameter of the fixing plate 3, the supporting surface of the transition plate 4 becomes smaller, which in turn reduces the supporting strength of the support plate 5. Therefore, the support plate 5 is indirectly fixed to the fixing plate 3 via the transition plate 4, rather than directly fixed to the fixing plate 3, in order to improve the supporting strength of the support plate 5.

[0046] During assembly, the cover plate 8 is placed on the support plate 5, and the wedge block 7 on the cover plate 8 descends and abuts against the fixing plate 3. The positioning protrusion at the bottom of the wedge block 7 can extend into the positioning hole on the fixing plate 3 to position the transition plate 4 and the cover plate 8. The transition plate 4 and the cover plate 8 are then fixed together on the fixing plate 3 by a number of the third fasteners 14.

[0047] In a preferred embodiment of the present invention, the bottom portion of the cover plate 8 is recessed inward to form a cavity that matches the wedge block 7, and a limiting hole is vertically opened through the top of the cavity. A limiting post 16 that can pass through the limiting hole is vertically fixedly provided on the top of the wedge block 7, and a limiting cap with a diameter larger than the limiting hole is fixedly provided on the top of the limiting post 16 that passes through the limiting hole.

[0048] In the above scheme, the diameter of the concave cavity is smaller than the diameter of the top of the wedge block 7, so that the wedge block 7 abuts against the outer wall around the port of the concave cavity.

[0049] During assembly, the cover plate 8 is placed on the support plate 5, and the wedge block 7 on the cover plate 8 descends and abuts against the fixing plate 3. The positioning protrusion at the bottom of the wedge block 7 can extend into the positioning hole on the fixing plate 3 to position the transition plate 4 and the cover plate 8. The transition plate 4 and the cover plate 8 are then fixed together to the fixing plate 3 using several No. 3 fasteners 14. At this time, the top of the wedge block 7 abuts against the cover plate 8, and its bottom abuts against the fixing plate 3 to fix the wedge block 7 and prevent it from moving in the vertical direction.

[0050] In a preferred embodiment of this utility model, the transition plate 4 and the cover plate 8 are vertically perforated at equal intervals along their circumference, each corresponding to one of the No. 3 fasteners 14. The fixing plate 3 is vertically perforated at equal intervals along its circumference, each corresponding to one of the No. 3 through holes on the transition plate 4 and the cover plate 8. All the No. 3 fasteners 14 pass through all the No. 3 through holes on all the cover plates 8 and the transition plate 4 in sequence and are screwed into their respective No. 3 threaded holes.

[0051] In the above scheme, the cover plate 8 and the transition plate 4 can be assembled together on the fixed plate 3 by using multiple No. 3 fasteners 14, which improves the assembly efficiency.

[0052] Furthermore, the method by which the transition plate 4 and the cover plate 8 are assembled using the third fastener 14 is the same as the assembly method of other fasteners, and will not be described again here.

[0053] In a preferred embodiment of this utility model, the bottom of the wedge block 7 is provided with a plurality of first-order assembly grooves at equal intervals and uniformly arranged along its circumference, and each of the first-order assembly grooves is vertically fixedly provided with a first-order spring 9 that can abut against the fixed plate 3. The bottom end of the cover plate 8 is provided with a plurality of second-order assembly grooves at equal intervals along its circumference, and each of the second-order assembly grooves is vertically fixedly provided with a second-order spring 10 that can abut against the fixed plate 3.

[0054] In the above scheme, during assembly, the cover plate 8 is placed on the support plate 5, and the wedge block 7 on the cover plate 8 descends and abuts against the fixing plate 3. The positioning protrusion at the bottom of the wedge block 7 can extend into the positioning hole on the fixing plate 3 to position the transition plate 4 and the cover plate 8. The transition plate 4 and the cover plate 8 are then fixed together to the fixing plate 3 by several of the No. 3 fasteners 14. At this time, the top of the wedge block 7 abuts against the cover plate 8, and its bottom abuts against the fixing plate 3 to fix the wedge block 7 and prevent it from moving in the vertical direction.

[0055] During the process of removing the transition plate 4 and the cover plate 8 from the fixed plate 3, after all the third fasteners 14 are removed from the transition plate 4 and the cover plate 8, the first spring 9 and the second spring 10 can lift the transition plate 4, the cover plate 8 and the wedge block 7 on the cover plate 8, thereby separating the transition plate 4 and the cover plate 8 from the fixed plate 3. At the same time, the positioning protrusion on the bottom of the wedge block 7 can extend from the positioning block on the fixed plate 3 so as to separate from the fixed plate 3.

[0056] In addition, the bottom ends of each of the first springs 9 and the second springs 10 can also be fixed to the fixing plate 3 respectively.

[0057] In a preferred embodiment of this utility model, the pressure plate 6 is detachably mounted on the support plate 5 by a plurality of No. 4 fasteners 15; wherein,

[0058] The pressure plate 6 has several No. 4 through holes that are equally spaced and vertically penetrated along its circumference and are adapted to all the No. 4 fasteners 15. The support plate 5 has several No. 4 threaded holes that are equally spaced and vertically penetrated along its circumference and correspond one-to-one with all the No. 4 through holes. All the No. 4 fasteners 15 pass through all the No. 4 through holes and are screwed into their respective No. 4 threaded holes.

[0059] In the above scheme, the assembly method of the pressure plate 6 on the support plate 5 is the same as the assembly method of the support plate 5 on the transition plate 4, so it will not be described again here.

[0060] In this embodiment, the first fastener 12, the second fastener 13, the third fastener 14, and the fourth fastener 15 can all be bolts or screws. The entire fixture can be assembled by fixing with bolts or screws, which improves the reliability and stability of the assembly and facilitates the replacement of each component later.

[0061] The advantages of assembling all components using threaded connections are: threaded connections achieve connection through the interlocking of threads, which has high reliability, is not easy to loosen, can withstand large tensile and shear forces, has good shock resistance, and when replacement, repair or adjustment is required, only reinforcement is needed, without changing the connection method.

[0062] In summary, the welding and maintenance fixture for the combustion chamber flange of an aero-engine provided by this utility model overcomes the problems of complex fixture structure, high manufacturing cost, and increased usage cost in the prior art.

[0063] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0064] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0065] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. An aeroengine combustor inner casing flange weld repair fixture, characterized by, The clamp comprises a base (1), a support column (2), a fixed plate (3), a support plate (5) and a pressing plate (6). The upper end of the base (1) is upwardly protruded to form a limiting step (11) matched with the workpiece, the middle part of the base (1) is vertically and detachably assembled with the support column (2), the top of the support column (2) is horizontally and coaxially fixedly provided with the fixed plate (3), the upper end of the fixed plate (3) is detachably and horizontally and coaxially fixedly provided with the support plate (5) for supporting the workpiece through a fixed assembly, and the support plate (5) is detachably and horizontally fixedly provided with the pressing plate (6) capable of abutting against the workpiece above the support plate (5).

2. The aeroengine combustion chamber inner case flange welding repair fixture according to claim 1, characterized in that, The inside of the support column (2) is a hollow structure, and the upper and lower ends thereof extend horizontally outward to form lower and upper extension parts, respectively, the lower extension part of the support column (2) is detachably assembled on the base (1) through a plurality of first fasteners (12).

3. The aeroengine combustion chamber inner case flange welding repair fixture according to claim 2, characterized in that, A plurality of first threaded holes matched with the plurality of first fasteners (12) are vertically and equidistantly arranged along the circumferential direction of the lower extension part, and a plurality of first through holes corresponding to all the first threaded holes are vertically and equidistantly arranged along the circumferential direction of the base (1), and all the first fasteners (12) pass through all the first through holes and are screwed into the respective corresponding first threaded holes.

4. The aeroengine combustion chamber inner case flange welding repair fixture according to claim 2, characterized in that, The fixed plate (3) is detachably assembled on the upper extension part through a plurality of second fasteners (13); wherein, A limiting part capable of being inserted into the inside of the support column (2) is protruded downward at the central position of the bottom of the fixed plate (3), a plurality of second threaded holes matched with the plurality of second fasteners (13) are vertically and equidistantly arranged along the circumferential direction of the fixed plate (3), and a plurality of second through holes corresponding to all the second threaded holes are vertically and equidistantly arranged along the circumferential direction of the upper extension part, and all the second fasteners (13) pass through all the second through holes and are screwed onto the respective corresponding second threaded holes.

5. The aeroengine combustion chamber inner case flange welding repair fixture according to claim 1, characterized in that, The fixed assembly comprises a transition plate (4), a wedge-shaped block (7) and a cover plate (8); wherein, The upper end of the fixed plate (3) is detachably and horizontally and coaxially provided with the transition plate (4), the diameter of the transition plate (4) is greater than that of the fixed plate (3), the middle part of the fixed plate (3) is vertically and through-provided with a positioning hole, the middle part of the transition plate (4) is vertically and through-provided with a wedge-shaped positioning cavity matched with the wedge-shaped block (7) and in the shape of an inverted circular table, the wedge-shaped block (7) capable of vertically ascending and descending in the positioning cavity is arranged below the cover plate (8) abutting against the transition plate (4), a positioning protrusion capable of being inserted into the positioning hole is downwardly extended at the central position of the bottom end of the wedge-shaped block (7), and the transition plate (4) and the cover plate (8) are detachably and fixedly provided on the fixed plate (3) through a plurality of third fasteners (14).

6. The aeroengine combustion chamber inner case flange welding repair fixture according to claim 5, characterized in that, The bottom end of the cover plate (8) is inwardly recessed to form a recess cavity matched with the wedge block (7), and a limiting hole is vertically provided at the top of the recess cavity, the top of the limiting column (16) of the wedge block (7) is vertically and fixedly provided with a limiting cap capable of passing through the limiting hole.

7. The aeroengine combustion chamber inner case flange welding repair fixture according to claim 5, characterized by, The transition plate (4) and the cover plate (8) are vertically and equally spaced through a plurality of third through holes corresponding to all the third fasteners (14) along the circumferential direction, and the fixing plate (3) is vertically and equally spaced through a plurality of third threaded holes corresponding to all the third through holes on the transition plate (4) and the cover plate (8) along the circumferential direction, and all the third fasteners (14) are sequentially passed through all the third through holes on the cover plate (8) and the transition plate (4) and screwed into the corresponding third threaded holes.

8. The aeroengine combustion chamber inner case flange welding repair fixture according to claim 5, characterized by, The bottom of the wedge block (7) is equally and uniformly provided with a plurality of first assembly grooves along the circumferential direction, and a first spring (9) capable of abutting against the fixing plate (3) is vertically and fixedly arranged in each first assembly groove, and the bottom end of the cover plate (8) is equally provided with a plurality of second assembly grooves along the circumferential direction, and a second spring (10) capable of abutting against the fixing plate (3) is vertically and fixedly arranged in each second assembly groove.

9. The aeroengine combustion chamber inner case flange welding repair fixture according to claim 1, characterized by, The pressing plate (6) is detachably assembled on the support plate (5) through a plurality of fourth fasteners (15); wherein, The pressing plate (6) is vertically and equally spaced through a plurality of fourth through holes matched with all the fourth fasteners (15) along the circumferential direction, the support plate (5) is vertically and equally spaced through a plurality of fourth threaded holes corresponding to all the fourth through holes along the circumferential direction, and all the fourth fasteners (15) are passed through all the fourth through holes and screwed into the corresponding fourth threaded holes.

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