A welding fixture for auxiliary power unit ducts

Abstract

This utility model relates to a welding fixture for auxiliary power unit ducts, comprising: a sheet metal welding module, a drainage welding module, and a baffle welding module. The sheet metal welding module includes an arc-shaped base, an arc-shaped pressure plate, and a first fixing block. The top of the arc-shaped base has an arc-shaped surface, and the arc-shaped pressure plate is detachably connected to one side of the arc-shaped surface. An installation groove is formed on the surface of the arc-shaped surface, and the first fixing block is detachably connected to the installation groove. Contouring grooves are formed on both sides of the arc-shaped base along its axial direction. The drainage welding module includes a second fixing block, the surface of which has positioning holes, and positioning bolts are installed in the positioning holes. The second fixing block is detachably connected to the installation groove. The baffle welding module includes a third fixing block, which is detachably connected to the installation groove, and its surface has a positioning groove. This utility model improves the welding efficiency of auxiliary power unit ducts while ensuring the welding quality and precision of the auxiliary power unit ducts.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary power unit manufacturing technology, and in particular to a welding fixture for auxiliary power unit ducts. Background Technology

[0002] The APU (auxiliary power unit) has become an important device on aircraft. As a power system, it usually consists of a small turbine engine and external bleed and exhaust ducts.

[0003] APU ducts are critical components in aircraft APU systems used for air delivery, and their structural design must balance multiple requirements, including high-temperature resistance, vibration resistance, sealing, and airflow optimization. (Refer to...) Figure 1 As shown, the APU's duct includes an arc-shaped sheet metal part 4, which comprises an arc-shaped plate 41 and two side plates 42. A baffle 6 is located at the lowest point of the arc-shaped sheet metal part. The baffle 6 is a V-shaped bent component and is fastened to the inside of the arc-shaped plate 41. A drain outlet is located at the bottom of the baffle 6, and a drain connector 5 passes through the drain outlet. Furthermore, the width of the baffle 6 is less than the width of the arc-shaped plate 41, and gaps are left between the two sides of the baffle 6 and the side plates 42 to connect to the bottom drain outlet.

[0004] In existing technologies, the assembly of air ducts requires these components to be completed by argon arc welding. Due to the special structure of the arc-shaped sheet metal part 4 and the installation of the drainage joint, precise positioning is required during the welding process. Traditional scribing welding is not only inefficient but also has poor welding accuracy, and the unstable deformation dimensions after welding affect the welding quality. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the defects of low welding efficiency, poor welding quality and welding precision in the prior art.

[0006] To solve the above-mentioned technical problems, this utility model provides an auxiliary power unit duct welding fixture, comprising:

[0007] A sheet metal welding module includes an arc-shaped base, an arc-shaped pressure plate, and a first fixing block. The top of the arc-shaped base is provided with an arc-shaped surface, and the arc-shaped pressure plate is detachably connected to one side of the arc-shaped surface. The surface of the arc-shaped surface is provided with a mounting groove along the axial direction of the arc-shaped base, and the first fixing block is detachably connected to the mounting groove. The surfaces of both sides of the arc-shaped base along the axial direction are provided with contour grooves.

[0008] A drainage welding module, comprising a second fixing block, wherein the surface of the second fixing block is provided with a positioning hole and a positioning bolt is provided in the positioning hole; the second fixing block is detachably connected to the mounting groove;

[0009] A baffle welding module, the baffle welding module includes a third fixing block, the third fixing block is detachably connected to the mounting groove, and the surface of the third fixing block is provided with a positioning groove.

[0010] In one embodiment of the present invention, the sheet metal welding module further includes fixing plates, which are disposed on both sides of the arc-shaped base near the contour groove, and multiple fixing plates are disposed along the circumference of the arc-shaped base.

[0011] In one embodiment of this utility model, the fixing clamp and the arc-shaped base are detachably connected.

[0012] In one embodiment of this utility model, a pressure strip is provided on the side of the arc-shaped pressure plate near the arc-shaped surface. Multiple pressure strips are provided along the length direction of the arc-shaped pressure plate, and the pressure strips are detachably connected to the arc-shaped pressure plate.

[0013] In one embodiment of this utility model, the two ends of the arc-shaped pressure plate are provided with buckles, and the surface of the arc-shaped base is provided with a locking platform that cooperates with the buckles.

[0014] In one embodiment of the present invention, first clearance grooves are provided on both sides of the arc-shaped surface.

[0015] The top of the first fixing block is provided with a second clearance groove corresponding to the position of the first clearance groove.

[0016] In one embodiment of the present invention, the top of the third fixing block is provided with a third clearance groove corresponding to the position of the first clearance groove.

[0017] In one embodiment of the present invention, two ports of the positioning groove are provided with limiting blocks, and the limiting blocks are detachably connected to the third fixing block.

[0018] In one embodiment of the present invention, the bottom of the mounting groove is provided with a first connecting hole, the bottom of the first fixing block is provided with a second connecting hole corresponding to the position of the first connecting hole, the bottom of the second fixing block is provided with a third connecting hole corresponding to the position of the first connecting hole, and the bottom of the third fixing block is provided with a fourth connecting hole corresponding to the position of the first connecting hole.

[0019] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0020] This utility model discloses a welding fixture for auxiliary power unit ducts. Firstly, it uses a contour groove and an arc-shaped pressure plate to position the arc-shaped sheet metal parts for welding, ensuring welding accuracy. Secondly, it uses a second fixing block and positioning bolts to precisely position and fix the drainage joint, achieving rapid positioning and welding of the drainage joint. Finally, the positioning groove on the third fixing block achieves precise positioning of the baffle, improving the welding quality of the baffle. This utility model improves the welding efficiency of auxiliary power unit ducts while ensuring welding quality and accuracy. Attached Figure Description

[0021] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the structure of the air duct in the background technology of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 3 for Figure 2 Structural diagram of the sheet metal welding module

[0025] Figure 4 for Figure 3 Schematic diagram of the structure of the arc-shaped base;

[0026] Figure 5 for Figure 3 Schematic diagram of the structure of the arc-shaped pressure plate;

[0027] Figure 6 for Figure 3 A schematic diagram of the structure of the first fixed block;

[0028] Figure 7 for Figure 2 Schematic diagram of the structure of the drainage welding module;

[0029] Figure 8 for Figure 2 Schematic diagram of the middle baffle welding module;

[0030] Explanation of reference numerals in the accompanying drawings: 1. Sheet metal welding module; 2. Drainage welding module; 3. Baffle welding module; 4. Arc-shaped sheet metal part; 5. Drainage connector; 6. Baffle; 11. Arc-shaped base; 12. Arc-shaped pressure plate; 13. First fixing block; 14. Fixing clamp; 15. Pressure strip; 21. Second fixing block; 22. Positioning bolt; 31. Third fixing block; 32. Limiting block; 41. Arc-shaped plate; 42. Side plate; 111. Arc-shaped surface; 112. Mounting groove; 113. Contour groove; 114. First clearance groove; 115. Clamping platform; 116. First connecting hole; 121. Buckle; 131. Second clearance groove; 132. Second connecting hole; 211. Positioning hole; 212. Third connecting hole; 311. Positioning groove; 312. Third clearance groove; 313. Fourth connecting hole. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0032] Reference Figure 2 As shown, this utility model discloses an auxiliary power unit duct welding fixture, comprising:

[0033] Sheet metal welding module 1, refer to Figures 3-6 As shown, the sheet metal welding module 1 includes an arc-shaped base 11, an arc-shaped pressure plate 12, and a first fixing block 13. The top of the arc-shaped base 11 is provided with an arc-shaped surface 111, and the arc-shaped pressure plate 12 is detachably connected to one side of the arc-shaped surface 111. The surface of the arc-shaped surface 111 is provided with a mounting groove 112 along the axial direction of the arc-shaped base 11, and the first fixing block 13 is detachably connected to the mounting groove 112. The surfaces of the arc-shaped base 11 on both sides along the axial direction are provided with contour grooves 113.

[0034] Drainage welding module 2, refer to Figure 7 As shown, the drainage welding module 2 includes a second fixing block 21, the surface of which is provided with a positioning hole 211, and a positioning bolt 22 is provided in the positioning hole 211; the second fixing block 21 is detachably connected to the mounting groove 112.

[0035] Baffle welding module 3, refer to Figure 8 As shown, the baffle welding module 3 includes a third fixing block 31, which is detachably connected to the mounting groove 112. The surface of the third fixing block 31 is provided with a positioning groove 311.

[0036] In this invention, the sheet metal welding module 1 is used for welding the arc-shaped sheet metal part 4. During the actual welding process, the arc-shaped plate 41 is fitted and positioned against the arc-shaped surface 111, and the arc-shaped plate 41 is pressed tightly by the arc-shaped pressure plate 12 to ensure the welding curvature of the arc-shaped plate 41. Then, the two side plates 42 are fitted and positioned against the contour groove 113, and finally, argon arc welding is performed on the joint between the arc-shaped plate 41 and the side plates 42. To ensure the subsequent welding of the baffle 6 and the drainage connector 5, this invention provides an installation groove 112 on the surface of the arc-shaped base 11. The installation groove 112 can be used for the installation of the first fixing block 13, the second fixing block 21, and the third fixing block 31.

[0037] In the actual welding process, the arc-shaped sheet metal part 4 is welded first. During welding, the arc-shaped plate 41 is supported by the first fixing block 13. After the arc-shaped sheet metal part 4 is welded, the arc-shaped pressure plate 12 is removed, and the second fixing block 21 is replaced in the mounting groove 112 for welding the drain connector 5. When welding the drain connector 5, the drain outlet on the arc-shaped sheet metal part 4 is aligned with the positioning hole 211 on the second fixing block. The drain connector 5 is placed at the drain outlet, and then the drain connector 5 and the positioning hole 211 are connected by the positioning bolt 22 to fix the drain connector 5 at the drain outlet. Then, the contact area between the drain connector 5 and the drain outlet is fixed by argon arc welding. After the drain connector 5 is welded, the baffle 6 is welded. After inserting the second fixing block 21, replace it with the third fixing block 31, place the baffle 6 in the positioning groove 311, and then fasten the arc-shaped sheet metal part 4 onto the arc-shaped surface 111. Perform energy storage welding (resistance welding) on ​​the contact area between the baffle 6 and the arc-shaped sheet metal part 4 to complete the welding of the entire air duct.

[0038] This invention first uses the contour groove 113 and the arc-shaped pressure plate 12 to position the arc-shaped sheet metal part 4 for welding, ensuring the welding accuracy of the arc-shaped sheet metal part 4. Secondly, the second fixing block 21 and the positioning bolts 22 accurately position and fix the drainage connector 5, achieving rapid positioning and welding of the drainage connector 5. Finally, the positioning groove 311 on the third fixing block 31 achieves precise positioning of the baffle 6, improving the welding quality of the baffle 6. This invention improves the welding efficiency of the auxiliary power unit duct while ensuring the welding quality and accuracy of the auxiliary power unit duct.

[0039] Furthermore, referring to Figure 3 As shown, the sheet metal welding module 1 also includes a fixing clamp 14, which is disposed on both sides of the arc-shaped base 11 near the contour groove 113, and multiple fixing clamps 14 are disposed around the arc-shaped base 11.

[0040] Specifically, the side plate 42 can be fixed by multiple fixing clamps 14 to prevent misalignment and shaking of the side plate 42 during welding, and to ensure the welding angle between the side plate 42 and the arc plate 41. As a preferred embodiment of this utility model, the fixing clamps 14 have a Y-shaped structure to make the side plate 42 fit as closely as possible to the contour groove 113.

[0041] Furthermore, the fixed clamp 14 and the arc-shaped base 11 are detachably connected by bolts, and the fixed clamp 14 and the arc-shaped base 11 can be locked at the same time.

[0042] Furthermore, referring to Figure 5 As shown, a pressure strip 15 is provided on the side of the arc-shaped pressure plate 12 near the arc-shaped surface 111. Multiple pressure strips 15 are provided along the length direction of the arc-shaped pressure plate 12, and the pressure strips 15 are detachably connected to the arc-shaped pressure plate 12.

[0043] Specifically, during the welding process, the pressure strip 15 is positioned between the arc-shaped pressure plate 12 and the arc-shaped plate 41, allowing the arc-shaped plate 41 to fit tightly against the arc-shaped surface 111. As a preferred embodiment of this invention, the surface of the arc-shaped pressure plate 12 is provided with multiple segments, dividing the arc-shaped pressure plate 12 into multiple sections, thus pressing the entire arc-shaped plate 41 firmly onto the arc-shaped surface 111, ensuring the welding accuracy and quality of the arc-shaped sheet metal part 4. Furthermore, the pressure strip 15 is connected to the annular pressure plate by bolts, allowing the number of pressure strips 15 to be increased or decreased according to actual conditions.

[0044] Furthermore, the two ends of the arc-shaped pressure plate 12 are provided with buckles 121, and the surface of the arc-shaped base 11 is provided with a locking platform 115 that cooperates with the buckles 121.

[0045] Specifically, during the actual welding process, after the arc-shaped sheet metal part 4 is assembled, the buckles 121 at both ends of the arc-shaped pressure plate 12 are connected to the mounting plate 115 to fix the arc-shaped pressure plate 12. Preferably, after the arc-shaped pressure plate 12 is fastened, it can be connected to the arc-shaped base 11 by bolts to further ensure the stability of the arc-shaped pressure plate 12.

[0046] Furthermore, referring to Figure 5 As shown, the arc-shaped surface 111 is provided with first clearance grooves 114 on both sides; the top of the first fixing block 13 is provided with a second clearance groove 131 corresponding to the position of the first clearance groove 114; the top of the third fixing block 31 is provided with a third clearance groove 312 corresponding to the position of the first clearance groove 114.

[0047] Specifically, during the actual welding process, a weld protrusion will form at the connection between the side plate 42 and the arc plate 41. The first clearance groove 114 and the second clearance groove 131 can prevent the arc sheet metal part 4 from deforming during welding, further improving the welding quality of the arc sheet metal part 4. Similarly, the third clearance groove 312 can avoid the weld protrusion, ensuring the welding accuracy and quality of the baffle 6.

[0048] Furthermore, the two ports of the positioning groove 311 are provided with limiting blocks 32, and the limiting blocks 32 are detachably connected to the third fixing block 31.

[0049] Specifically, since drainage gaps are left between the two sides of the baffle 6 and the side plate 42, the width of the baffle 6 is less than the distance between the two side plates 42. In the actual welding process, the baffle 6 can be limited along the axis of the arc-shaped base 11 by the two limiting blocks 32, so as to ensure the welding accuracy of the baffle 6.

[0050] Furthermore, the bottom of the mounting groove 112 is provided with a first connecting hole 116, the bottom of the first fixing block 13 is provided with a second connecting hole 132 corresponding to the position of the first connecting hole 116, the bottom of the second fixing block 21 is provided with a third connecting hole 212 corresponding to the position of the first connecting hole 116, and the bottom of the third fixing block 31 is provided with a fourth connecting hole 313 corresponding to the position of the first connecting hole 116.

[0051] Specifically, in the actual welding process, the first fixing block 13, the second fixing block 21 and the third fixing block 31 are connected to the first connecting hole 116 on the mounting groove 112 through the second connecting hole 132, the third connecting hole 212 and the fourth connecting hole 313 respectively, so as to fix the first fixing block 13, the second fixing block 21 and the third fixing block 31.

[0052] In summary, this utility model introduces a welding fixture for auxiliary power unit ducts. Firstly, the conformal groove 113 and the arc-shaped pressure plate 12 are used to position the arc-shaped sheet metal part 4 for welding, ensuring the welding accuracy of the arc-shaped sheet metal part 4. Secondly, the second fixing block 21 and the positioning bolts 22 are used to precisely position and fix the drainage connector 5, achieving rapid positioning and welding of the drainage connector 5. Finally, the positioning groove 311 on the third fixing block 31 achieves precise positioning of the baffle 6, improving the welding quality of the baffle 6. This utility model improves the welding efficiency of auxiliary power unit ducts while ensuring the welding quality and accuracy of the auxiliary power unit ducts.

[0053] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An auxiliary power unit duct welding fixture, comprising: include: A sheet metal welding module includes an arc-shaped base, an arc-shaped pressure plate, and a first fixing block. The top of the arc-shaped base is provided with an arc-shaped surface, and the arc-shaped pressure plate is detachably connected to one side of the arc-shaped surface. The surface of the arc-shaped surface is provided with a mounting groove along the axial direction of the arc-shaped base, and the first fixing block is detachably connected to the mounting groove. The surfaces of both sides of the arc-shaped base along the axial direction are provided with contour grooves. A drainage welding module, comprising a second fixing block, wherein the surface of the second fixing block is provided with a positioning hole and a positioning bolt is provided in the positioning hole; the second fixing block is detachably connected to the mounting groove; A baffle welding module, the baffle welding module includes a third fixing block, the third fixing block is detachably connected to the mounting groove, and the surface of the third fixing block is provided with a positioning groove.

2. The APU duct welding fixture of claim 1, wherein: The sheet metal welding module also includes fixing plates, which are disposed on both sides of the arc-shaped base near the contour groove, and multiple fixing plates are disposed along the circumference of the arc-shaped base.

3. The APU duct welding fixture of claim 2, wherein: The fixed clamp is detachably connected to the arc-shaped base.

4. The APU duct welding fixture of claim 1, wherein: A pressure strip is provided on the side of the arc-shaped pressure plate near the arc-shaped surface. Multiple pressure strips are provided along the length of the arc-shaped pressure plate, and the pressure strips are detachably connected to the arc-shaped pressure plate.

5. The APU duct welding fixture of claim 1, wherein: The arc-shaped pressure plate has buckles at both ends, and the surface of the arc-shaped base has a locking platform that engages with the buckles.

6. The APU duct welding fixture of claim 1, wherein: The arc-shaped surface is provided with first clearance grooves on both sides.

7. The APU duct welding fixture of claim 6, wherein: The top of the first fixing block is provided with a second clearance groove corresponding to the position of the first clearance groove.

8. The APU duct welding fixture of claim 6, wherein: The top of the third fixing block is provided with a third clearance groove corresponding to the position of the first clearance groove.

9. The APU duct welding fixture of claim 1, wherein: The two ports of the positioning groove are provided with limit blocks, and the limit blocks are detachably connected to the third fixing block.

10. The APU duct welding fixture of claim 1, wherein: The bottom of the mounting slot is provided with a first connecting hole, the bottom of the first fixing block is provided with a second connecting hole corresponding to the position of the first connecting hole, the bottom of the second fixing block is provided with a third connecting hole corresponding to the position of the first connecting hole, and the bottom of the third fixing block is provided with a fourth connecting hole corresponding to the position of the first connecting hole.

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