A limiting device and method for a string type titanium-based rotary body during a repairing process

Abstract

The application discloses a limiting device and method in a string type titanium-based rotary body repairing process, and the limiting method idea for the deformation problem is derived from the analysis of the deformation possibly generated in the structural part repairing process, finally, the limiting device is designed, the limiting control in the string type titanium-based rotary body repairing process is carried out by adopting the limiting device, the end face warping problem is solved by adopting the first pressing block and the second pressing block, the end face flatness of the upper and lower end faces of the mounting edge is ensured, the non-complete cylindrical pin limiting clamping mode is adopted, the roundness of the non-welding part of the mounting hole to be repaired is ensured, meanwhile, the manual argon arc welding welding process of the welding part to be repaired is not affected, the rigid limiting in the repairing process of the structural part mounting edge hole crack is ensured as a whole, and the micro-deformation or no deformation of the repaired structural part can be finally ensured to meet the size requirement of the design drawing.

Description

Technical Field

[0001] This invention belongs to the field of engine component repair technology, specifically a limiting device and method in the repair process of a series titanium-based rotating body. Background Technology

[0002] Due to prolonged exposure to complex service environments, cracks may develop in the mounting holes of annular structural components in military and civilian aircraft engines that are connected via pin holes. A crack diagram is shown below. Figure 1 As shown. Due to the lack of systematic repair methods in the early stages, the presence of this type of crack led to the scrapping of a large number of problematic structural components.

[0003] Because these structural components are in their final dimensions, and the large amount of heat input during the filler wire manual TIG welding repair process may cause thermal deformation of the repair area and surrounding region, excessive thermal deformation will prevent the deformed area from effectively recovering during subsequent stress relief, resulting in the final dimensions of the structural component exceeding the design requirements. Therefore, dimensional limiting of the repair area and surrounding region is crucial during the filler wire manual TIG welding repair of these structural components. However, existing limiting devices are either unsuitable for the mounting holes of annular structural components or lack sufficient accuracy in limiting. Summary of the Invention

[0004] The present invention provides a limiting device and method in the repair process of a series titanium-based rotating body, which solves the problems that existing limiting devices are either not suitable for the mounting holes of the annular structure or the limiting is not accurate enough.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A limiting device for the repair process of a series titanium-based rotating body includes a first pressing block and a second pressing block. The mounting edge of the series titanium-based rotating body to be repaired is placed between the first pressing block and the second pressing block. The first pressing block and the second pressing block are fixed by a first hexagonal head bolt and a second hexagonal head bolt. A groove to be repaired is hollowed out at the center of the first pressing block and the second pressing block, and a pin is provided in the groove to be repaired.

[0007] Preferably, the first and second pressing blocks are rigid pressing blocks.

[0008] Preferably, the first hexagonal head bolt and the second hexagonal head bolt are installed at both ends of the first pressure block and the second pressure block.

[0009] Preferably, the diameters of the first and second hexagonal head bolts are the same as the diameter of the mounting hole of the titanium-based rotating body to be repaired.

[0010] Preferably, the thickness of the first and second pressing blocks is in the range of 5mm-10mm.

[0011] Preferably, the pin is a rigid pin.

[0012] Preferably, the pin is a non-complete cylindrical pin with the same diameter as the mounting side hole of the titanium-based rotating body to be repaired.

[0013] Preferably, the non-complete cylindrical pin must have an axial projection of its end face greater than 1 / 2 of a circle of the same diameter.

[0014] Preferably, the pin is fixed to the first and second pressure blocks by a pad and a nut.

[0015] A limiting method in the repair process of a series-type titanium-based rotating body includes:

[0016] The first and second pressure blocks are placed on both sides of the titanium-based rotating body to be repaired. The first and second pressure blocks are then fixed and clamped by the first and second hexagonal head bolts. A pin is inserted into the mounting hole to be repaired and the protruding part of the pin is aligned with the groove to be repaired in the mounting hole.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a limiting device in the repair process of a series titanium-based rotating body. The idea of ​​a limiting method for deformation problems is derived from the analysis of possible deformations that may occur during the repair process of structural components. Finally, by designing a limiting device, the limiting device is used to control the limiting during the repair process of the series titanium-based rotating body. The use of the first and second pressure blocks solves the end face warping problem, ensuring the flatness of the end face of the upper and lower end faces of the mounting edge. The use of the pin clamping method ensures the roundness of the non-welding part of the mounting hole to be repaired without affecting the manual argon arc welding process of the part to be repaired. Overall, it ensures rigid limiting during the repair process of the crack in the mounting edge hole of the structural component, and can ultimately ensure that the micro-deformation or no deformation of the repaired structural component meets the dimensional requirements of the design drawing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the crack on the edge of the mounting hole in this invention;

[0019] Figure 2 This is a front view of a limiting device in the repair process of a string-type titanium-based rotating body according to the present invention;

[0020] Figure 3 This is a top view of a limiting device in the repair process of a string-type titanium-based rotating body according to the present invention;

[0021] Figure 4 This is a schematic diagram of the area to be repaired in the present invention.

[0022] In the diagram, 1-pad; 2-first pressure block; 3-pin; 4-second pressure block; 5-nut; 6-second hexagonal head bolt; 7-first hexagonal head bolt; 8-groove to be repaired for welding. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 2 As shown, the present invention provides a limiting device in the repair process of a series titanium-based rotating body, including a first pressing block 2 and a second pressing block 4. The series titanium-based rotating body to be repaired is placed between the first pressing block 2 and the second pressing block 4. The first pressing block 2 and the second pressing block 4 are fixed by a first hexagonal head bolt 7 and a second hexagonal head bolt 6. A weld groove 8 to be repaired is hollowed out at the center of the first pressing block 2 and the second pressing block 4. A pin 3 is provided in the weld groove 8.

[0031] Another embodiment of the present invention provides a limiting device in the repair process of a series titanium-based rotating body, including a first pressing block 2 and a second pressing block 4. The series titanium-based rotating body to be repaired is placed between the first pressing block 2 and the second pressing block 4. The first pressing block 2 and the second pressing block 4 are fixed by a first hexagonal head bolt 7 and a second hexagonal head bolt 6. A weld groove 8 to be repaired is hollowed out at the center of the first pressing block 2 and the second pressing block 4. A pin 3 is provided in the weld groove 8.

[0032] The first pressing block 2 and the second pressing block 4 are rigid pressing blocks.

[0033] Another embodiment of the present invention provides a limiting device in the repair process of a series titanium-based rotating body, including a first pressing block 2 and a second pressing block 4. The series titanium-based rotating body to be repaired is placed between the first pressing block 2 and the second pressing block 4. The first pressing block 2 and the second pressing block 4 are fixed by a first hexagonal head bolt 7 and a second hexagonal head bolt 6. A weld groove 8 to be repaired is hollowed out at the center of the first pressing block 2 and the second pressing block 4. A pin 3 is provided in the weld groove 8.

[0034] The first hexagonal head bolt 7 and the second hexagonal head bolt 6 are installed at both ends of the first pressure block 2 and the second pressure block 4.

[0035] Another embodiment of the present invention provides a limiting device in the repair process of a series titanium-based rotating body, including a first pressing block 2 and a second pressing block 4. The series titanium-based rotating body to be repaired is placed between the first pressing block 2 and the second pressing block 4. The first pressing block 2 and the second pressing block 4 are fixed by a first hexagonal head bolt 7 and a second hexagonal head bolt 6. A weld groove 8 to be repaired is hollowed out at the center of the first pressing block 2 and the second pressing block 4. A pin 3 is provided in the weld groove 8.

[0036] The mounting holes of the first hexagonal head bolt 7 and the second hexagonal head bolt 6 have the same diameter as the mounting edge holes of the titanium-based rotating body to be repaired.

[0037] Another embodiment of the present invention provides a limiting device in the repair process of a series titanium-based rotating body, including a first pressing block 2 and a second pressing block 4. The series titanium-based rotating body to be repaired is placed between the first pressing block 2 and the second pressing block 4. The first pressing block 2 and the second pressing block 4 are fixed by a first hexagonal head bolt 7 and a second hexagonal head bolt 6. A weld groove 8 to be repaired is hollowed out at the center of the first pressing block 2 and the second pressing block 4. A pin 3 is provided in the weld groove 8.

[0038] The thickness of the first pressing block 2 and the second pressing block 4 is 5mm-10mm.

[0039] Another embodiment of the present invention provides a limiting device in the repair process of a series titanium-based rotating body, including a first pressing block 2 and a second pressing block 4. The series titanium-based rotating body to be repaired is placed between the first pressing block 2 and the second pressing block 4. The first pressing block 2 and the second pressing block 4 are fixed by a first hexagonal head bolt 7 and a second hexagonal head bolt 6. A weld groove 8 to be repaired is hollowed out at the center of the first pressing block 2 and the second pressing block 4. A pin 3 is provided in the weld groove 8.

[0040] The pin 3 is a rigid pin.

[0041] Another embodiment of the present invention provides a limiting device in the repair process of a series titanium-based rotating body, including a first pressing block 2 and a second pressing block 4. The series titanium-based rotating body to be repaired is placed between the first pressing block 2 and the second pressing block 4. The first pressing block 2 and the second pressing block 4 are fixed by a first hexagonal head bolt 7 and a second hexagonal head bolt 6. A weld groove 8 to be repaired is hollowed out at the center of the first pressing block 2 and the second pressing block 4. A pin 3 is provided in the weld groove 8.

[0042] The pin 3 is a non-complete cylindrical pin with a diameter corresponding to the mounting hole diameter of the titanium-based rotating body to be repaired.

[0043] Another embodiment of the present invention provides a limiting device in the repair process of a series titanium-based rotating body, including a first pressing block 2 and a second pressing block 4. The series titanium-based rotating body to be repaired is placed between the first pressing block 2 and the second pressing block 4. The first pressing block 2 and the second pressing block 4 are fixed by a first hexagonal head bolt 7 and a second hexagonal head bolt 6. A weld groove 8 to be repaired is hollowed out at the center of the first pressing block 2 and the second pressing block 4. A pin 3 is provided in the weld groove 8.

[0044] The incomplete cylindrical pin must have an axial projection of its end face greater than 1 / 2 of a circle of the same diameter.

[0045] Another embodiment of the present invention provides a limiting device in the repair process of a series titanium-based rotating body, including a first pressing block 2 and a second pressing block 4. The series titanium-based rotating body to be repaired is placed between the first pressing block 2 and the second pressing block 4. The first pressing block 2 and the second pressing block 4 are fixed by a first hexagonal head bolt 7 and a second hexagonal head bolt 6. A weld groove 8 to be repaired is hollowed out at the center of the first pressing block 2 and the second pressing block 4. A pin 3 is provided in the weld groove 8.

[0046] The pin 3 is fixed to the first pressure block 2 and the second pressure block 4 by the pad 1 and the nut 5.

[0047] The implementation process of this invention:

[0048] 1. Analyze the possible deformations that may occur during the repair process, such as Figure 1 As shown, the crack in the mounting hole is located on the edge of the thin-walled mounting edge, at the edge of the structural component. During the repair process, this area undergoes grinding to remove the defect and subsequent manual argon arc welding with filler wire. During the welding process, excessive local heat input may cause three types of deformation: ① Sagging of the mounting edge end face near the repaired area and / or warping due to wrinkles caused by thermal stress, resulting in substandard end face flatness; ② Excessive heat input causing changes in the roundness of the non-welded parts of the mounting hole to be repaired, or even damage to the mounting hole; ③ Excessive heat input may cause changes in the position and roundness of the holes near the left and right sides of the mounting hole to be repaired, such as holes A and B, and the mounting holes extending along both sides.

[0049] 2. Derivation of the Limiting Method: Based on the brief analysis in step 1, there are three most likely deformation scenarios during manual TIG welding repair of cracked mounting holes: warping of the mounting edge at the repair site, changes in the roundness of the non-welded portion of the mounting hole to be repaired, and the positional accuracy and roundness of the mounting holes near the left and right sides of the mounting hole to be repaired, such as holes A and B, and those extending along both sides. Considering the thin-walled structural characteristics of the area to be repaired, these three types of deformation problems can be limited by applying rigid force. First, for end face warping, it can be limited by pressing down with rigid blocks. Second, for changes in the roundness of the non-welded portion of the mounting hole to be repaired, it can be limited by inserting a rigid pin of the same diameter as the mounting edge hole, taking into account tolerances and the welding space for manual TIG welding. Finally, for the positional accuracy and roundness of deformed mounting holes near the left and right sides, such as holes A and B, and those extending along both sides, it can be limited by inserting a rigid pin of the same diameter as the mounting edge hole, taking into account tolerances.

[0050] 3. Implementation of the limiting method: As described in steps 1 and 2, the possible deformations and corresponding limiting methods during the repair process have been clarified. The problem of implementing the limiting method is how to comprehensively consider the limiting process of the three possible deformations during the repair of the structural components and form an integrated limiting method.

[0051] Based on this, the present invention designs an integrated limiting method and corresponding limiting device for repairing edge hole cracks in thin-walled parts. A schematic diagram of the limiting device is shown below. Figure 2As shown. For the end face warping problem described in step 1, the first pressure block 2 and the second pressure block 4 in the limiting device are placed as rigid pressure blocks on the upper and lower end faces of the mounting edge of the part to be repaired. After the limiting device is clamped as a whole, it rigidly limits the plane of the mounting edge to ensure the flatness of the end faces of the upper and lower end faces of the mounting edge. The materials selected for the first pressure block 2 and the second pressure block 4 should strictly consider the rigidity of the material and the fan-shaped segments with the same outer diameter and a certain thickness. The positions of "hole A" and "hole B" in the fan-shaped segments are processed into through holes with the same position and diameter as the holes on the mounting edge. The "part to be welded" in the fan-shaped segments is processed into a U-shaped groove that takes into account the welding space. The optimal range of the thickness of the fan-shaped segments is 5mm to 10mm. For the roundness variation problem of the non-welding part of the mounting hole to be repaired as described in step 1, the pin 3 in the limiting device is used as a rigid pin to rigidly limit the mounting hole to be welded. The pin 3 is machined into a non-complete cylindrical pin with the same diameter as the mounting hole, taking into account dimensional tolerances. This non-complete cylindrical pin must ensure that the axial projection of its end face is greater than half the diameter of a circle. The top of the pin 3 is machined with a nut, the diameter of which is compatible with the width of the U-shaped grooves machined in the first pressure block 2 and the second pressure block 4, after considering tolerances. The bottom of the pin 3 is machined with a threaded pattern. During installation, the pin 3 is inserted into the mounting hole to be repaired from top to bottom and rotated to ensure that the protruding part of the pin 3 faces the welding groove 8. Then, the nut with a shim is tightened from the bottom of the pin 3. This clamping method ensures the roundness of the non-welding part of the mounting hole to be repaired while not affecting the manual argon arc welding process of the repaired part. Regarding the issue of positional and roundness variations of the mounting holes near the left and right sides of the mounting hole to be repaired, as described in step 1, the first hexagonal head bolt 7 in the limiting device acts as a rigid bolt, inserted from top to bottom into the mounting holes at positions A and B respectively, followed by tightening the nut from the bottom. This clamping method limits the roundness of mounting holes A and B while the rigid fit between the first hexagonal head bolt 7 and the first pressure block 2 and the second pressure block 4 ensures that the positional and roundness of the mounting holes near the left and right sides of the mounting hole to be repaired, such as holes A and B, and the mounting holes extending along both sides, remain unchanged.

[0052] The advantage of this invention is that it solves three problems related to the repair of cracks in the mounting holes of the fan casing in its final state:

[0053] ① Analysis of possible deformations during structural component repair;

[0054] ② The idea of ​​a limiting method for deformation problems is derived;

[0055] ③ The specific implementation process of the limit method.

[0056] 1. To address the problem①, a comprehensive analysis was conducted on the structural characteristics of the part of the structural component to be repaired and the technological features of the repair method. Three deformation trends were summarized: end face warping during the repair process, changes in the roundness of the non-welded portion of the mounting hole to be repaired, and changes in the position and roundness of the mounting holes near the left and right sides of the mounting hole to be repaired, such as holes A and B, and mounting holes extending along both sides.

[0057] 2. To solve problem ②, based on the three deformations obtained in step 1, a rigid pressure test method is considered for limiting the movement. For end face warping, the limit is achieved by pressing the pressure blocks up and down; for changes in the roundness of the non-welded parts of the mounting hole to be repaired, the limit is achieved by inserting a non-complete cylindrical pin of the same diameter, taking into account tolerances; for changes in the position and roundness of the mounting holes near the left and right sides of the mounting hole to be repaired, such as holes A and B, and the mounting holes distributed along both sides, the roundness limit is achieved by inserting a rigid bolt of the same diameter, taking into account tolerances, and the position and roundness of the holes are limited by the rigid fit between the rigid bolt and the first pressure block 2 and the second pressure block 4.

[0058] 3. To solve problem ③, based on the approach used to solve problem ②, a complete integrated limiting method and limiting device were designed. A schematic diagram of the limiting device is shown below. Figure 2 As shown.

[0059] The installation method of the limiting device is as follows: Before repairing and welding the installation edge of the structural component, the defective parts are removed first. After confirming that the defect has been completely removed, the first pressure block 2 and the second pressure block 4 are placed on the upper and lower sides of the installation edge, respectively, and the first hexagonal head bolt 7 and the second hexagonal head bolt 6 are used in accordance with... Figure 2 The first pressure block 2 and the second pressure block 4 are fixed and clamped at positions A and B, respectively. The pin 3 is inserted into the mounting hole to be repaired and the open part of the pin 3 is aligned with the mounting hole to be repaired and welded groove 8. Then, the pad block 1 and nut 5 are used for clamping.

[0060] 2. Beneficial effects

[0061] This invention derives the idea of ​​a limiting method for deformation problems from the analysis of possible deformations that may occur during the repair of structural components, and finally implements the limiting method by designing a limiting device and method.

[0062] The invention employs this method for limiting and controlling the movement during the repair process of a series-type titanium-based rotating body. This ensures rigid limiting during the repair of cracks in the mounting holes of structural components, ultimately guaranteeing that the repaired structural components exhibit minimal or no deformation to meet the dimensional requirements of the design drawings. Although the embodiments of the invention have been described above in conjunction with the accompanying drawings, the invention is not limited to the specific embodiments and application fields described above. The specific embodiments described above are merely illustrative and instructive, not restrictive. Those skilled in the art, guided by the description, can make many other modifications without departing from the scope of the claims, and all of these modifications are within the scope of protection of this invention.

Claims

1. A limiting device in the repair process of a string-type titanium-based rotating body, characterized in that, It includes a first pressure block (2) and a second pressure block (4). A series of titanium-based rotating bodies are placed between the first pressure block (2) and the second pressure block (4) to be repaired. The first pressure block (2) and the second pressure block (4) are fixed by a first hexagonal head bolt (7) and a second hexagonal head bolt (6). The center of the first pressure block (2) and the second pressure block (4) has a hollowed-out groove (8) to be repaired. A pin (3) is provided in the groove (8) to be repaired. The pin (3) is a non-complete cylindrical pin with the same diameter as the mounting side hole of the titanium-based rotating body to be repaired; The incomplete cylindrical pin must have an axial projection of its end face greater than 1 / 2 of a circle of the same diameter.

2. The limiting device in the repair process of a string-type titanium-based rotating body according to claim 1, characterized in that, The first pressing block (2) and the second pressing block (4) are rigid pressing blocks.

3. The limiting device in the repair process of a string-type titanium-based rotating body according to claim 1, characterized in that, The first hexagonal head bolt (7) and the second hexagonal head bolt (6) are installed at both ends of the first pressure block (2) and the second pressure block (4).

4. The limiting device in the repair process of a string-type titanium-based rotating body according to claim 1, characterized in that, The diameters of the first hexagonal head bolt (7) and the second hexagonal head bolt (6) are the same as the diameter of the mounting side hole of the titanium-based rotating body to be repaired.

5. The limiting device in the repair process of a string-type titanium-based rotating body according to claim 1, characterized in that, The thickness range of the first pressing block (2) and the second pressing block (4) is 5mm-10mm.

6. The limiting device in the repair process of a string-type titanium-based rotating body according to claim 1, characterized in that, The pin (3) is a rigid pin.

7. The limiting device in the repair process of a string-type titanium-based rotating body according to claim 1, characterized in that, The pin (3) is fixed to the first pressure block (2) and the second pressure block (4) by the pad (1) and the nut (5).

8. A limiting method in the repair process of a series-mounted titanium-based rotating body, based on the limiting device in the repair process of a series-mounted titanium-based rotating body as described in any one of claims 1-7, characterized in that, include: Place the first pressure block (2) and the second pressure block (4) on both sides of the titanium-based rotating body to be repaired. Then, use the first hexagonal head bolt (7) and the second hexagonal head bolt (6) to fix and clamp the first pressure block (2) and the second pressure block (4). Insert the pin (3) into the mounting hole to be repaired and align the empty part of the pin (3) with the mounting hole to be repaired groove (8).

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