Welding anti-deformation device

Abstract

The utility model provides a welding anti-deformation device which comprises a supporting mechanism, a plurality of expansion mechanisms used for expanding combustion chamber components and a pressing disc used for adjusting the distance between the expansion mechanisms, and the peripheral side of the pressing disc abuts against the expansion mechanisms in a sliding mode. The multiple expansion mechanisms and the pressing disc are installed on the supporting mechanism in a sliding mode. A mechanical expansion mode is adopted at the position of a welded junction to expand and align a workpiece at the position of the welded junction from the inside, thermal deformation of a base material of the combustion chamber can be effectively resisted in the welding process, the defects of joint staggering and deformation are reduced to a great extent, and the welding quality is guaranteed. The expansion mechanism is used for expanding the combustion chamber components on the two sides of the welding seam to the preset roundness, it is guaranteed that the two sides of the welding seam are aligned, and misalignment is avoided.

Description

Technical Field

[0001] This utility model relates to the field of thin-walled metal welding technology, and in particular to a welding deformation prevention device. Background Technology

[0002] Aero engines and aero-derivative gas turbines often employ annular combustor structures, which are typically assembled from multiple components through welding, riveting, or screwing. However, welded annular combustor structures, due to their large diameter and thin wall material, are prone to issues such as misalignment and deformation during welding. Therefore, certain measures are needed to mitigate or eliminate these problems. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a welding deformation prevention device to address the shortcomings of the existing technology.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a welding anti-deformation device, comprising: a support mechanism, a plurality of expansion mechanisms for expanding and tightening combustion chamber components, and a pressure plate for adjusting the distance between the plurality of expansion mechanisms. The periphery of the pressure plate slides against the plurality of expansion mechanisms, and the plurality of expansion mechanisms and the pressure plate are all slidably mounted on the support mechanism.

[0005] The beneficial effects of adopting the technical solution of this utility model are as follows: At the weld joint, a mechanical expansion method is used to internally expand and align the workpiece at the weld joint. During the welding process, this effectively resists the thermal deformation of the combustion chamber substrate material, greatly reducing misalignment and deformation defects, and ensuring welding quality. The expansion mechanism is used to expand the combustion chamber components on both sides of the weld to a predetermined roundness and ensure alignment of both sides of the weld, avoiding misalignment.

[0006] Furthermore, the pressure plate has a conical structure, and the periphery of the pressure plate is a conical surface.

[0007] The beneficial effect of adopting the above-mentioned further technical solution is that: the up-and-down movement of the conical pressure plate pushes multiple sliders with wedge blocks to move along the diameter direction. The lower part of the slider has an arc-shaped top block. Multiple top blocks simultaneously apply thrust to the inner wall of the combustion chamber to achieve the purpose of tightening.

[0008] Furthermore, the tensioning mechanism includes a slider and a top block. The top of the slider is provided with a wedge-shaped block adapted to the pressure plate. The periphery of the pressure plate abuts against the wedge-shaped block. The slider is slidably mounted on the support mechanism, and the top block is mounted on the bottom of the slider.

[0009] The beneficial effect of adopting the above-mentioned further technical solution is that: the up-and-down movement of the conical pressure plate pushes multiple sliders with wedge blocks to move along the diameter direction. The lower part of the slider has an arc-shaped top block. Multiple top blocks simultaneously apply thrust to the inner wall of the combustion chamber to achieve the purpose of tightening.

[0010] Furthermore, the curvature of the top block is the same as that of the combustion chamber components; the top block has an arc-shaped structure.

[0011] The beneficial effect of adopting the above-mentioned further technical solution is that: the up and down movement of the conical pressure plate pushes multiple sliders with wedge blocks to move along the diameter direction. The lower part of the slider has an arc-shaped top block with the same curvature as the inner wall of the combustion chamber. Multiple top blocks simultaneously apply thrust to the inner wall of the combustion chamber to achieve the purpose of tightening.

[0012] Furthermore, the plurality of the tensioning mechanisms are slidably mounted on the support mechanism along the radial direction of the support mechanism, and the pressure plate is slidably mounted on the support mechanism along the axial direction of the support mechanism.

[0013] The beneficial effects of adopting the above-mentioned further technical solution are: it facilitates the expansion mechanism to expand the combustion chamber components on both sides of the weld to the predetermined roundness, and ensures that the two sides of the weld are aligned, avoiding misalignment. It also facilitates the movement of multiple sliders with wedge-shaped blocks along the diameter direction by the up-and-down movement of the pressure plate.

[0014] Furthermore, the tightening mechanism is provided with an air passage for supplying protective gas to the back of the weld during welding.

[0015] The beneficial effects of adopting the above-mentioned further technical solution are: the protective gas circuit part is used to pass inert gas protective gas on the back of the weld during welding to avoid oxidation of the weld metal.

[0016] Furthermore, the air passage includes a groove and an air hole. The groove is disposed inside the expansion mechanism, and the air hole is disposed on the expansion mechanism. The groove and the air hole are connected, and the position of the air hole is adapted to the position on the back side of the weld.

[0017] The beneficial effects of adopting the above-mentioned further technical solution are: the groove inside the arc-shaped top block reserves a portion for the weld pool, preventing the arc-shaped top block from sticking to the combustion chamber components during welding. The groove and pores inside the arc-shaped top block allow shielding gas to be delivered to the arc-shaped top block via multiple flexible hoses, and then through the grooves and pores to the back of the weld, forming a localized shielding gas atmosphere and preventing weld oxidation.

[0018] Furthermore, a compression rod is installed on the support mechanism, the pressure plate is slidably mounted on the compression rod, and a compression nut is threaded onto the compression rod, the compression nut abutting against the pressure plate.

[0019] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the extrusion rod and the extrusion nut facilitates the extrusion of the pressure plate, and facilitates the movement of multiple sliders with wedge blocks along the diameter direction through the up and down movement of the pressure plate. The lower part of the slider has an arc-shaped top block, and multiple top blocks simultaneously apply thrust to the inner wall of the combustion chamber to achieve the purpose of tightening.

[0020] Furthermore, the support mechanism includes: a base plate, a bracket, and a support plate. The bracket is mounted on the base plate, and the support plate is mounted on the bracket. Multiple tensioning mechanisms and the pressure plate are slidably mounted on the support plate. The support plate has multiple connecting mechanisms on its periphery for connecting with combustion chamber components.

[0021] The beneficial effects of adopting the above-mentioned further technical solution are: the base plate, bracket, and support plate are used to provide stable support for the welding anti-deformation device. The connecting mechanism is used to fix the various components of the combustion chamber.

[0022] Furthermore, the support plate is vertically and flexibly mounted on the bracket by adjusting bolts. The connecting mechanism includes a connecting rod and a connecting bolt. The connecting rod has an L-shaped structure. One end of the connecting rod is connected to the periphery of the support plate, and the connecting bolt is mounted on the other end of the connecting rod.

[0023] The beneficial effects of adopting the above-mentioned further technical solution are: the adjusting bolts can fine-tune the weld gap. The connecting rods and connecting bolts are used to fix the various components of the combustion chamber.

[0024] The advantages of this invention in its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 A schematic diagram of the welding anti-deformation device provided in an embodiment of this utility model.

[0026] The following are the reference numerals: 1. Support mechanism; 2. Tensioning mechanism; 3. Pressure plate; 4. Slider; 5. Top block; 6. Wedge block; 7. Groove; 8. Air hole; 9. Extrusion rod; 10. Extrusion nut; 11. Base plate; 12. Bracket; 13. Support plate; 14. Connecting mechanism; 15. Adjusting bolt; 16. Connecting rod; 17. Connecting bolt. Detailed Implementation

[0027] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0028] like Figure 1As shown, this utility model embodiment provides a welding anti-deformation device, including: a support mechanism 1, a plurality of expansion mechanisms 2 for expanding and tightening combustion chamber components, and a pressure plate 3 for adjusting the distance between the plurality of expansion mechanisms 2. The periphery of the pressure plate 3 is slidably abutting against the plurality of expansion mechanisms 2, and the plurality of expansion mechanisms 2 and the pressure plate 3 are all slidably mounted on the support mechanism 1.

[0029] The beneficial effects of adopting the technical solution of this utility model are as follows: At the weld joint, a mechanical expansion method is used to internally expand and align the workpiece at the weld joint. During the welding process, this effectively resists the thermal deformation of the combustion chamber substrate material, greatly reducing misalignment and deformation defects, and ensuring welding quality. The expansion mechanism is used to expand the combustion chamber components on both sides of the weld to a predetermined roundness and ensure alignment of both sides of the weld, avoiding misalignment.

[0030] This utility model relates to the field of thin-walled metal welding technology, and provides a welding deformation prevention device, which can be used as a welding deformation prevention device for thin-walled combustion chambers.

[0031] The device (welding anti-deformation device) can be divided into three main parts according to its structure and function: 1. Combustion chamber component positioning part (connecting mechanism), used to fix the various components of the combustion chamber and adjust the weld gap by fine adjustment; 2. Mechanical expansion part (expansion mechanism), used to expand the combustion chamber components on both sides of the weld to the predetermined roundness and ensure that the two sides of the weld are aligned to avoid misalignment; 3. Protective gas passage part (gas passage), used to pass inert gas protective gas on the back of the weld during welding to prevent the weld metal from oxidizing.

[0032] To address the issues of misalignment and deformation defects that occur during circumferential welds in annular combustion chambers, a welding deformation prevention device is provided. This device employs a mechanical structure to fix the position of the workpiece to be welded, and uses a mechanical expansion mechanism (tightening mechanism) at the weld joint to internally tighten and align the workpiece. During the welding process, it effectively resists thermal deformation of the combustion chamber substrate material, significantly reducing misalignment and deformation defects and ensuring weld quality.

[0033] like Figure 1 As shown, the pressure plate 3 is further described as having a conical structure, with the periphery of the pressure plate 3 being a conical surface.

[0034] The beneficial effect of adopting the above-mentioned further technical solution is that: the up-and-down movement of the conical pressure plate pushes multiple sliders with wedge blocks to move along the diameter direction. The lower part of the slider has an arc-shaped top block. Multiple top blocks simultaneously apply thrust to the inner wall of the combustion chamber to achieve the purpose of tightening.

[0035] like Figure 1As shown, the tensioning mechanism 2 further includes a slider 4 and a top block 5. The top of the slider 4 is provided with a wedge-shaped block 6 that is adapted to the pressure plate 3. The periphery of the pressure plate 3 abuts against the wedge-shaped block 6. The slider 4 is slidably mounted on the support mechanism 1, and the top block 5 is mounted on the bottom of the slider 4.

[0036] The beneficial effect of adopting the above-mentioned further technical solution is that: the up-and-down movement of the conical pressure plate pushes multiple sliders with wedge blocks to move along the diameter direction. The lower part of the slider has an arc-shaped top block. Multiple top blocks simultaneously apply thrust to the inner wall of the combustion chamber to achieve the purpose of tightening.

[0037] like Figure 1 As shown, the curvature of the top block 5 is the same as that of the combustion chamber component; the top block 5 has an arc-shaped structure.

[0038] The beneficial effect of adopting the above-mentioned further technical solution is that: the up and down movement of the conical pressure plate pushes multiple sliders with wedge blocks to move along the diameter direction. The lower part of the slider has an arc-shaped top block with the same curvature as the inner wall of the combustion chamber. Multiple top blocks simultaneously apply thrust to the inner wall of the combustion chamber to achieve the purpose of tightening.

[0039] like Figure 1 As shown, further, a plurality of the tensioning mechanisms 2 are slidably mounted on the support mechanism 1 along the radial direction of the support mechanism 1, and the pressure plate 3 is slidably mounted on the support mechanism 1 along the axial direction of the support mechanism 1.

[0040] The beneficial effects of adopting the above-mentioned further technical solution are: it facilitates the expansion mechanism to expand the combustion chamber components on both sides of the weld to the predetermined roundness, and ensures that the two sides of the weld are aligned, avoiding misalignment. It also facilitates the movement of multiple sliders with wedge-shaped blocks along the diameter direction by the up-and-down movement of the pressure plate.

[0041] like Figure 1 As shown, the tightening mechanism 2 is further provided with an air passage for supplying protective gas to the back of the weld during welding.

[0042] The beneficial effects of adopting the above-mentioned further technical solution are: the protective gas circuit part is used to pass inert gas protective gas on the back of the weld during welding to avoid oxidation of the weld metal.

[0043] like Figure 1 As shown, the air passage further includes a groove 7 and an air hole 8. The groove 7 is disposed inside the expansion mechanism 2, and the air hole 8 is disposed on the expansion mechanism 2. The groove 7 and the air hole 8 are connected, and the position of the air hole 8 is adapted to the position on the back of the weld.

[0044] The beneficial effects of adopting the above-mentioned further technical solution are: the groove inside the arc-shaped top block reserves a portion for the weld pool, preventing the arc-shaped top block from sticking to the combustion chamber components during welding. The groove and pores inside the arc-shaped top block allow shielding gas to be delivered to the arc-shaped top block via multiple flexible hoses, and then through the grooves and pores to the back of the weld, forming a localized shielding gas atmosphere and preventing weld oxidation.

[0045] like Figure 1 As shown, further, a compression rod 9 is installed on the support mechanism 1, the pressure plate 3 is slidably installed on the compression rod 9, and a compression nut 10 is threadedly installed on the compression rod 9, the compression nut 10 abutting against the pressure plate 3.

[0046] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the extrusion rod and the extrusion nut facilitates the extrusion of the pressure plate, and facilitates the movement of multiple sliders with wedge blocks along the diameter direction through the up and down movement of the pressure plate. The lower part of the slider has an arc-shaped top block, and multiple top blocks simultaneously apply thrust to the inner wall of the combustion chamber to achieve the purpose of tightening.

[0047] A spring can be fitted onto the extrusion rod. The spring is located between the pressure plate and the support plate, with each end of the spring corresponding to and abutting against the pressure plate and the support plate.

[0048] like Figure 1 As shown, the support mechanism 1 further includes: a base plate 11, a bracket 12 and a support plate 13. The bracket 12 is mounted on the base plate 11, and the support plate 13 is mounted on the bracket 12. Multiple tensioning mechanisms 2 and pressure plates 3 are slidably mounted on the support plate 13. Multiple connecting mechanisms 14 for connecting with combustion chamber components are provided on the periphery of the support plate 13.

[0049] The beneficial effects of adopting the above-mentioned further technical solution are: the base plate, bracket, and support plate are used to provide stable support for the welding anti-deformation device. The connecting mechanism is used to fix the various components of the combustion chamber.

[0050] like Figure 1 As shown, the support plate 13 is further mounted on the bracket 12 in a height-adjustable manner by means of adjusting bolts 15. The connecting mechanism 14 includes a connecting rod 16 and a connecting bolt 17. The connecting rod 16 has an L-shaped structure. One end of the connecting rod 16 is connected to the periphery of the support plate 13, and the connecting bolt 17 is mounted on the other end of the connecting rod 16.

[0051] The beneficial effects of adopting the above-mentioned further technical solution are: the adjusting bolts can fine-tune the weld gap. The connecting rods and connecting bolts are used to fix the various components of the combustion chamber.

[0052] The positioning part of the combustion chamber component is based on the specific structural design of the combustion chamber component.

[0053] The mechanical tightening component (tightening mechanism) uses the up-and-down movement of a conical pressure plate to push multiple sliders with wedge-shaped blocks along the diameter direction. The lower part of the sliders has an arc-shaped top block with the same curvature as the combustion chamber inner wall. These multiple top blocks simultaneously apply thrust to the combustion chamber inner wall, achieving the tightening purpose. The arc-shaped top block has grooves to allow for the weld pool portion, preventing the arc-shaped top block from adhering to the combustion chamber components during welding.

[0054] The arc-shaped top block (top block) has grooves and pores. After the shielding gas is delivered to the arc-shaped top block through multiple hoses, it is then delivered to the back of the weld through the grooves and pores to form a local shielding gas atmosphere and prevent the weld from oxidizing.

[0055] This device (welding anti-deformation device) is easy to use and produces satisfactory welding quality. Through techniques such as spot welding positioning and segmented skip welding, it successfully solves the problems of welding deformation and misalignment. It also has significant potential for application in welding thin-walled combustion chambers or annular thin-walled parts in similar scenarios.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A welding deformation prevention device, characterized in that, include: The support mechanism, multiple tensioning mechanisms for tightening combustion chamber components, and a pressure plate for adjusting the distance between the multiple tensioning mechanisms, wherein the periphery of the pressure plate slides against the multiple tensioning mechanisms, and the multiple tensioning mechanisms and the pressure plate are all slidably mounted on the support mechanism.

2. The welding anti-deformation device according to claim 1, characterized in that, The pressure plate has a conical structure, and the periphery of the pressure plate is a conical surface.

3. The welding deformation prevention device according to claim 1, characterized in that, The tightening mechanism includes a slider and a top block. The top of the slider is provided with a wedge-shaped block adapted to the pressure plate. The periphery of the pressure plate abuts against the wedge-shaped block. The slider is slidably mounted on the support mechanism, and the top block is mounted on the bottom of the slider.

4. The welding anti-deformation device according to claim 3, characterized in that, The curvature of the top block is the same as that of the combustion chamber components; the top block has an arc-shaped structure.

5. The welding deformation prevention device according to claim 1, characterized in that, The plurality of the tensioning mechanisms are slidably mounted on the support mechanism along the radial direction, and the pressure plate is slidably mounted on the support mechanism along the axial direction.

6. The welding deformation prevention device according to claim 1, characterized in that, The tightening mechanism is equipped with an air passage for supplying protective gas to the back of the weld during welding.

7. A welding deformation prevention device according to claim 6, characterized in that, The air passage includes a groove and an air hole. The groove is disposed inside the expansion mechanism, and the air hole is disposed on the expansion mechanism. The groove and the air hole are connected. The position of the air hole is adapted to the position on the back of the weld.

8. A welding deformation prevention device according to claim 1, characterized in that, A compression rod is installed on the support mechanism, and the pressure plate is slidably installed on the compression rod. A compression nut is threaded onto the compression rod, and the compression nut abuts against the pressure plate.

9. A welding deformation prevention device according to claim 1, characterized in that, The support mechanism includes a base plate, a bracket, and a support plate. The bracket is mounted on the base plate, and the support plate is mounted on the bracket. Multiple tensioning mechanisms and the pressure plate are slidably mounted on the support plate. Multiple connection mechanisms for connecting with combustion chamber components are provided on the periphery of the support plate.

10. A welding deformation prevention device according to claim 9, characterized in that, The support plate is vertically and flexibly mounted on the bracket by adjusting bolts. The connecting mechanism includes a connecting rod and a connecting bolt. The connecting rod has an L-shaped structure. One end of the connecting rod is connected to the periphery of the support plate, and the connecting bolt is installed on the other end of the connecting rod.

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