A thin-walled sheet metal component welding positioning tool and welding method

Abstract

The application discloses a kind of thin-wall sheet metal assembly welding positioning tool and welding method, positioning tool includes: first positioning assembly;Second positioning assembly;Third positioning assembly;Fourth positioning assembly;Fifth positioning assembly.The application will thin-wall sheet metal assembly be split into multiple groups of components and be completed welding one by one, then each component is combined and welded, and the positioning of positioning tool effectively avoids the problem that the key position of thin-wall sheet metal assembly is deformed due to welding stress, and the overall precision of welding processing is high, which ensures the welding quality of thin-wall sheet metal assembly.

Description

Technical Field

[0001] This invention relates to the field of sheet metal welding technology, and in particular to a welding positioning fixture and welding method for thin-walled sheet metal components. Background Technology

[0002] In the manufacturing of aero engines, various sheet metal parts are encountered, many of which require welding connections to form their shape. For example... Figure 1 and Figure 2 The thin-walled sheet metal assembly shown includes a bottom flange. A first inner sheet metal part is welded to the top of the bottom flange. Above the first inner sheet metal part, a second, third, and fourth inner sheet metal parts are welded together sequentially from bottom to top. A blade limiting sleeve is welded to the outer periphery of the bottom end of the second inner sheet metal part. An inner blade groove is provided on the blade limiting sleeve along the circumferential direction. An outer blade groove is provided on the top of the first inner sheet metal part along the circumferential direction. Blades pass through the outer blade grooves and insert into the inner blade grooves one by one, and the blades are welded to the outer blade grooves. A first outer sheet metal part is welded to the top of the bottom flange on the outer periphery of each inner sheet metal part. A sheet metal connector is welded to the top of the first outer sheet metal part and the fourth inner sheet metal part. A second outer sheet metal part is welded to the top of the sheet metal connector. A top flange is welded to the top of the second outer sheet metal part. The thin-walled sheet metal component has a thin wall thickness, making it prone to deformation due to welding stress, which can lead to product scrap. Furthermore, it has many components, making welding difficult and overall positional accuracy hard to control. Therefore, a welding positioning fixture and welding method for the thin-walled sheet metal component are designed to ensure welding quality. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a welding positioning fixture and welding method for thin-walled sheet metal components. The thin-walled sheet metal component is disassembled into multiple groups of components and welded one by one. Then, the components are assembled and welded together. The positioning fixture can effectively avoid the problem of deformation of key parts of the thin-walled sheet metal component due to welding stress by limiting the position. The overall welding process has high precision and ensures the welding quality of the thin-walled sheet metal component.

[0004] The present invention provides a welding positioning fixture for thin-walled sheet metal components, comprising:

[0005] The first positioning component is used to position the bottom flange and the first inner sheet metal component of the thin-walled sheet metal component so that they can be welded together to form the first component.

[0006] The second positioning component is used to position the second, third, and fourth inner sheet metal parts of the thin-walled sheet metal component so that they can be welded together to form the second component.

[0007] The third positioning component is used to position the first component, the second component, the blade limiting sleeve and the blade, so that they are welded together to form the third component;

[0008] The fourth positioning component is used to position the top flange and the second outer sheet metal part of the thin-walled sheet metal component so that they can be welded together to form the fourth component.

[0009] The fifth positioning component is used to position the third component, the first outer sheet metal part, the sheet metal connector and the fourth component so that they can be welded together to form a thin-walled sheet metal component.

[0010] Furthermore, the first positioning component includes a first base; a first column is fixedly disposed on the top surface of the first base;

[0011] The top surface of the first base has a first positioning groove around the outer periphery of the first column for positioning the bottom flange. Several first support blocks are evenly distributed around the top surface of the first base, around the outer periphery of the first positioning groove. A first pressure plate is provided between the top surface of each support block and the bottom flange. The first pressure plate is fixedly connected to the first base by first bolts located between the first support blocks and the bottom flange. First pads are provided inside the bottom flange, below each first pressure plate.

[0012] A first positioning plate is fixedly sleeved on the first column for positioning and supporting the first inner sheet metal part; a first cover plate is detachably sleeved on the top of the first column for pressing and fixing the first inner sheet metal part; the first cover plate is fixedly connected to the first positioning plate by a second bolt.

[0013] Furthermore, the second positioning component includes a second base; a first positioning protrusion is fixedly provided on the top surface of the second base for positioning the fourth inner sheet metal part; a second column is fixedly provided on the top surface of the first positioning protrusion.

[0014] A first pressure ring is provided above the second base on the outer periphery of the first positioning protrusion, for pressing and fixing the fourth inner sheet metal part; the first pressure ring is fixedly connected to the second base by a third bolt;

[0015] The second column is detachably fitted with a support plate for positioning and supporting the third inner sheet metal part; a support step is provided on the second column below the support plate, and the support plate is fixedly connected to the first positioning protrusion by a fourth bolt.

[0016] The top of the second column is fixedly connected to a second positioning plate by a fifth bolt, which is used to position the second inner sheet metal part.

[0017] Furthermore, the third positioning component includes a third base; a third column is fixedly disposed on the top surface of the third base;

[0018] The top surface of the third base has a second positioning groove around the outer periphery of the third column for positioning the bottom of the first component; several second support blocks are evenly distributed around the outer periphery of the second positioning groove on the top surface of the third base; a second pressure plate is provided between the top surface of the second support block and the first component; the second pressure plate is fixedly connected to the third base by a sixth bolt, which is located between the second support block and the first component; and a second pad is provided inside the first component below the second pressure plate.

[0019] The top of the third column is fixedly connected to a first positioning plate by a seventh bolt; the bottom surface of the first positioning plate is provided with a third positioning groove around the outer periphery of the third column for positioning the top of the second component; a support ring is fixedly provided around the bottom surface of the first positioning plate at the outer periphery of the third positioning groove, and a second pressure ring is provided between the bottom surface of the support ring and the second component. The second pressure ring is fixedly connected to the first positioning plate by an eighth bolt, which is located between the support ring and the second component; a washer ring is provided inside the second component above the second pressure ring.

[0020] Furthermore, the fourth positioning component includes a fourth base; a second positioning protrusion is fixedly provided on the top surface of the fourth base for positioning the second outer sheet metal part;

[0021] The top surface of the fourth base has a fourth positioning groove around the outer periphery of the second positioning protrusion for positioning the top flange. Several third support blocks are evenly distributed around the outer periphery of the fourth positioning groove on the top surface of the fourth base. A third pressure plate is provided between the top surface of the third support block and the top flange. The third pressure plate is fixedly connected to the fourth base by a ninth bolt, which is located between the third support block and the top flange.

[0022] Furthermore, the fifth positioning component includes a fifth base, and a fourth column is fixedly disposed on the top surface of the fifth base;

[0023] The top surface of the fifth base has a fifth positioning groove around the outer periphery of the fourth column for positioning the bottom of the third component. Several fourth support blocks are evenly distributed around the inner periphery of the fifth positioning groove on the top surface of the fifth base. A fourth pressure plate is positioned between the top surface of each fourth support block and the inner side of the third component. The fourth pressure plate is fixedly connected to the fifth base by a tenth bolt, which is located between the fourth support block and the third component. A third positioning disc is fixedly connected to the top of the fourth column by an eleventh bolt for positioning and supporting the inner periphery of the top of the third component.

[0024] The top surface of the fifth base is fixedly provided with several pillars on the outer periphery of the fifth positioning groove. The top of the pillars is fixedly connected to a second positioning plate by a twelfth bolt. The bottom surface of the second positioning plate is provided with a sixth positioning groove for positioning the top of the fourth component. The bottom surface of the second positioning plate is evenly distributed with several fifth support blocks on the outer periphery of the sixth positioning groove. A fifth pressure plate is provided between the bottom surface of the fifth support block and the fourth component. The fifth pressure plate is fixedly connected to the second positioning plate by a thirteenth bolt, which is located between the fifth support block and the fourth component. An operation hole is provided on the second positioning plate above the inner side of the fourth component.

[0025] In addition, the present invention also provides a welding method for thin-walled sheet metal components, wherein the welding method is a method of welding and connecting thin-walled sheet metal components using the above-mentioned welding fixture.

[0026] Furthermore, the welding method for thin-walled sheet metal components includes the following steps:

[0027] First component welding: The bottom flange and the first inner sheet metal part are positioned by the first positioning component, and the bottom flange and the first inner sheet metal part are welded together to form the first component;

[0028] Second component welding: The second positioning component positions the second inner sheet metal part, the third inner sheet metal part, and the fourth inner sheet metal part. First, the third inner sheet metal part and the fourth inner sheet metal part are welded together, and then the second inner sheet metal part and the third inner sheet metal part are welded together to form the second component.

[0029] Third component welding: The first component, the second component, the blade limiting sleeve and the blade are positioned by the third positioning component. First, the blade limiting sleeve is welded to the first component, and then the blade is welded to the second component to form the third component.

[0030] Fourth component welding: The top flange and the second outer sheet metal part are positioned by the fourth positioning component, and the top flange and the second outer sheet metal part are welded together to form the fourth component;

[0031] Thin-walled sheet metal component welding: The third component, the first outer sheet metal part, the sheet metal connector and the fourth component are positioned by the fifth positioning component. First, the first outer sheet metal part and the third component are welded together. Then, the sheet metal connector is welded together with the third component and the first outer sheet metal part. Finally, the fourth component and the sheet metal connector are welded together to form the thin-walled sheet metal component.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] This invention uses a first positioning component to position the bottom flange and the first inner sheet metal component, which are then welded together to form a first assembly. A second positioning component positions the second, third, and fourth inner sheet metal components, which are then welded together to form a second assembly. A third positioning component positions the first assembly, the second assembly, the blade limiting sleeve, and the blade, which are then welded together to form a third assembly. A fourth positioning component positions the top flange and the second outer sheet metal component, which are then welded together to form a fourth assembly. A fifth positioning component positions the third assembly, the first outer sheet metal component, the sheet metal connector, and the fourth assembly, which are then welded together to form a thin-walled sheet metal assembly.

[0034] This invention disassembles thin-walled sheet metal components into multiple groups, welds each group individually, and then assembles and welds the components together. By using positioning fixtures to limit the movement, the problem of deformation of key parts of the thin-walled sheet metal components due to welding stress can be effectively avoided. The overall welding process has high precision, ensuring the welding quality of the thin-walled sheet metal components.

[0035] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0036] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0037] Figure 1 This is a structural schematic diagram of a thin-walled sheet metal assembly;

[0038] Figure 2 This is a schematic diagram of the cross-sectional structure of a thin-walled sheet metal component;

[0039] Figure 3 This is a structural diagram of the third component;

[0040] Figure 4 A cross-sectional structural diagram of the first component installed on the first positioning component;

[0041] Figure 5 A cross-sectional structural diagram of the second component installed on the second positioning component;

[0042] Figure 6 A cross-sectional structural diagram of the third component installed on the third positioning component;

[0043] Figure 7 A cross-sectional structural diagram of the fourth component installed on the fourth positioning component;

[0044] Figure 8 A cross-sectional structural diagram of a thin-walled sheet metal assembly installed on the fifth positioning assembly.

[0045] The diagram labels are as follows: 1. Thin-walled sheet metal assembly; 2. First positioning assembly; 3. Second positioning assembly; 4. Third positioning assembly; 5. Fourth positioning assembly; 6. Fifth positioning assembly;

[0046] 11. Bottom flange; 12. First inner sheet metal part; 13. Second inner sheet metal part; 14. Third inner sheet metal part; 15. Fourth inner sheet metal part; 16. Blade limiting sleeve; 17. Blade; 18. First outer sheet metal part; 19. Sheet metal connector; 110. Second outer sheet metal part; 111. Top flange;

[0047] 21. First base; 22. First column; 23. First positioning groove; 24. First support block; 25. First pressure plate; 26. First bolt; 27. First pad; 28. First positioning plate; 29. ​​First cover plate; 210. Second bolt;

[0048] 31. Second base; 32. First positioning protrusion; 33. Second column; 34. First pressure ring; 35. Third bolt; 36. Support plate; 37. Support step; 38. Fourth bolt; 39. Fifth bolt; 310. Second positioning plate;

[0049] 41. Third base; 42. Third column; 43. Second positioning groove; 44. Second support block; 45. Second pressure plate; 46. Sixth bolt; 47. Second pad; 48. Seventh bolt; 49. First positioning plate; 410. Third positioning groove; 411. Support ring; 412. Second pressure ring; 413. Eighth bolt; 414. Washer ring;

[0050] 51. Fourth base; 52. Second positioning protrusion; 53. Fourth positioning groove; 54. Third support block; 55. Third pressure plate; 56. Ninth bolt;

[0051] 61. Fifth base; 62. Fourth column; 63. Fifth positioning groove; 64. Fourth support block; 65. Fourth pressure plate; 66. Tenth bolt; 67. Eleventh bolt; 68. Third positioning plate; 69. Support column; 610. Twelfth bolt; 611. Second positioning plate; 612. Sixth positioning groove; 613. Operating hole. Detailed Implementation

[0052] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0053] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] Please refer to Figures 1 to 8 An embodiment of the present invention provides a welding positioning fixture for thin-walled sheet metal components, comprising:

[0055] The first positioning component 2 is used to position the bottom flange 11 and the first inner sheet metal component 12 of the thin-walled sheet metal component 1 so that they can be welded together to form the first component.

[0056] The second positioning component 3 is used to position the second inner sheet metal part 13, the third inner sheet metal part 14 and the fourth inner sheet metal part 15 of the thin-walled sheet metal component 1 so that they are welded together to form the second component.

[0057] The third positioning component 4 is used to position the first component, the second component, the blade limiting sleeve 16 and the blade 17 so that they are welded together to form the third component.

[0058] The fourth positioning component 5 is used to position the top flange 111 and the second outer sheet metal part 110 of the thin-walled sheet metal component 1 so that they are welded together to form the fourth component.

[0059] The fifth positioning component 6 is used to position the third component, the first outer sheet metal part 18, the sheet metal connector 19 and the fourth component so that they can be welded together to form a thin-walled sheet metal component 1.

[0060] In this embodiment, for example Figure 1 and Figure 2When the thin-walled sheet metal assembly 1 shown is welded together, since the thin-walled sheet metal assembly 1 has a large number of components, the technical solution of this application breaks it down into multiple groups for separate welding and connection, and then assembles them to complete the overall welding connection. During the welding connection process of the thin-walled sheet metal assembly 1, the limiting effect of the positioning fixture effectively avoids the problem of deformation of the key parts of the thin-walled sheet metal assembly 1 due to welding stress, resulting in high overall welding precision and ensuring the welding quality of the thin-walled sheet metal assembly 1.

[0061] In a preferred embodiment, such as Figure 4 As shown, the first positioning component 2 includes a first base 21; a first column 22 is fixedly disposed on the top surface of the first base 21;

[0062] The top surface of the first base 21 is provided with a first positioning groove 23 around the outer periphery of the first column 22 for positioning the bottom flange 11; a plurality of first support blocks 24 are evenly distributed around the outer periphery of the first positioning groove 23 on the top surface of the first base 21; a first pressure plate 25 is provided between the top surface of the first support block 24 and the bottom flange 23; the first pressure plate 25 is fixedly connected to the first base 21 by first bolts 26, which are located between the first support block 24 and the bottom flange 11; a first pad 27 is provided inside the bottom flange 11 below the first pressure plate 25;

[0063] A first positioning plate 28 is fixedly sleeved on the first column 22 for positioning and supporting the first inner sheet metal part 12; a first cover plate 29 is detachably sleeved on the top of the first column 22 for pressing and fixing the first inner sheet metal part 12; the first cover plate 29 is fixedly connected to the first positioning plate 28 by a second bolt 210.

[0064] In this embodiment, the bottom flange 11 is positioned and fixed by the cooperation of the first positioning groove 23 and the first pressure plate 25. The first pad 27 can effectively prevent the bottom flange 11 from deforming due to force when it is fixed. The first inner sheet metal part 12 is positioned and fixed by the cooperation of the first positioning plate 28 and the first cover plate 29, which ensures the coaxiality between the first inner sheet metal part 12 and the bottom flange 11 and ensures the welding quality between the two, laying the foundation for the overall welding quality of the thin-walled sheet metal assembly 1.

[0065] In a preferred embodiment, such as Figure 5 As shown, the second positioning component 3 includes a second base 31; a first positioning protrusion 32 is fixedly provided on the top surface of the second base 31 for positioning the fourth inner sheet metal part 15; a second column 33 is fixedly provided on the top surface of the first positioning protrusion 32.

[0066] A first pressure ring 34 is provided above the second base 31 on the outer periphery of the first positioning protrusion 32, which is used to press and fix the fourth inner sheet metal part 15; the first pressure ring 34 is fixedly connected to the second base 31 by the third bolt 35.

[0067] A support plate 36 is detachably sleeved on the second column 33 for positioning and supporting the third inner sheet metal part 14; a support step 37 is provided on the second column 33 below the support plate 36, and the support plate 36 is fixedly connected to the first positioning protrusion 32 by the fourth bolt 38.

[0068] The top of the second column 33 is fixedly connected to the second positioning plate 310 by the fifth bolt 39, which is used to position the second inner sheet metal part 13.

[0069] In this embodiment, the fourth inner sheet metal part 15 is inverted and fastened onto the first positioning protrusion 32 for positioning, and then fixed by the first pressure ring 34; then the support plate 36 is fixed to the second column 33 by the fourth bolt 38, and the third inner sheet metal part 14 is inverted and fastened onto the support plate 36 for positioning and support. Then the second inner sheet metal part 13 is connected to the top of the third inner sheet metal part 14, and the second positioning plate 310 is fixed to the top of the second column 33 by the fifth bolt 39 to position the second inner sheet metal part 13 axially.

[0070] When performing welding connections, the third inner sheet metal part 14 and the fourth inner sheet metal part 15 are welded together first, which can effectively avoid the problem of part deformation caused by welding stress. Then the second inner sheet metal part 13 and the third inner sheet metal part 14 are welded together. Since the second inner sheet metal part 13 has a machining allowance, the influence of welding stress on the second inner sheet metal part 13 can be ignored, and it is only necessary to ensure its axial position.

[0071] The second positioning component 3 ensures the coaxiality between the second inner sheet metal part 13, the third inner sheet metal part 14 and the fourth inner sheet metal part 15, and ensures the welding quality among the three, laying the foundation for the overall welding quality of the thin-walled sheet metal component 1.

[0072] In a preferred embodiment, such as Figure 6 As shown, the third positioning component 4 includes a third base 41; a third column 42 is fixedly disposed on the top surface of the third base 41.

[0073] The top surface of the third base 41 is provided with a second positioning groove 43 around the outer periphery of the third column 42 for positioning the bottom of the first component; a number of second support blocks 44 are evenly distributed around the top surface of the third base 41 around the second positioning groove 43; a second pressure plate 45 is provided between the top surface of the second support block 44 and the first component; the second pressure plate 45 is fixedly connected to the third base 41 by a sixth bolt 46, which is located between the second support block 44 and the first component; a second pad 47 is provided inside the first component below the second pressure plate 45;

[0074] The top of the third column 42 is fixedly connected to the first positioning plate 49 by the seventh bolt 48; the bottom surface of the first positioning plate 49 is provided with a third positioning groove 410 around the outer periphery of the third column 42 for positioning the top of the second component; a support ring 411 is fixedly provided around the bottom surface of the first positioning plate 49 around the outer periphery of the third positioning groove 410; a second pressure ring 412 is provided between the bottom surface of the support ring 411 and the second component; the second pressure ring 412 is fixedly connected to the first positioning plate 49 by the eighth bolt 413, which is located between the support ring 411 and the second component; a washer ring 414 is provided inside the second component above the second pressure ring 412.

[0075] In this embodiment, when welding the third component, the first component is first positioned and fixed by the second positioning groove 43 and the second pressure plate 45. The setting of the second pad 47 can effectively prevent the first component from deforming due to force.

[0076] Then, flip the first positioning plate 49 over, place the washer 414 on the first positioning plate 49, and then flip the second component over and fasten it onto the first positioning plate 49. Position and fix the second component using the third positioning groove 410 and the second pressure ring 412. Then, install the blade limiting sleeve 16 onto the second component. Next, flip the first positioning plate 49 back over and fix it to the top of the third column 42 using the seventh bolt 48. Adjust the position of the blade limiting sleeve 16, and insert each blade 17 through the outer blade groove and into the inner blade groove. This completes the positioning and installation of the third component.

[0077] The third positioning component 4 ensures the coaxiality and positional accuracy between the first component, the second component, the blade limiting sleeve 16, and the blade 17, and ensures the welding quality between the components, laying the foundation for the overall welding quality of the thin-walled sheet metal component 1.

[0078] In a preferred embodiment, such as Figure 7 As shown, the fourth positioning component 5 includes a fourth base 51; a second positioning protrusion 52 is fixedly provided on the top surface of the fourth base 51 for positioning the second outer sheet metal part 110.

[0079] The top surface of the fourth base 51 is provided with a fourth positioning groove 53 around the outer periphery of the second positioning protrusion 52 for positioning the top flange 111; a number of third support blocks 54 are evenly distributed around the outer periphery of the fourth positioning groove 53 on the top surface of the fourth base 51, and a third pressure plate 55 is provided between the top surface of the third support block 54 and the top flange 111. The third pressure plate 55 is fixedly connected to the fourth base 51 by a ninth bolt 56, which is located between the third support block 54 and the top flange 111.

[0080] In this embodiment, when welding the fourth component, the top flange 111 is first inverted and embedded into the fourth positioning groove 53 for positioning, and then pressed and fixed by the third pressure plate 55. Then, the second outer sheet metal part 110 is inverted and fastened onto the second positioning protrusion 52 for positioning and support. This ensures the coaxiality between the second outer sheet metal part 110 and the top flange 111, ensuring the welding quality between them and laying the foundation for the overall welding quality of the thin-walled sheet metal component 1.

[0081] In a preferred embodiment, such as Figure 8 As shown, the fifth positioning component 6 includes a fifth base 61, and a fourth column 62 is fixedly installed on the top surface of the fifth base 61;

[0082] The top surface of the fifth base 61 is provided with a fifth positioning groove 63 around the outer periphery of the fourth column 62 for positioning the bottom of the third component; several fourth support blocks 64 are evenly distributed around the inner periphery of the fifth positioning groove 63 on the top surface of the fifth base 61; a fourth pressure plate 65 is provided between the top surface of the fourth support block 64 and the inner side of the third component; the fourth pressure plate 65 is fixedly connected to the fifth base 61 by a tenth bolt 66, which is located between the fourth support block 64 and the third component; the top of the fourth column 62 is fixedly connected to a third positioning plate 68 by an eleventh bolt 67 for positioning and supporting the inner periphery of the top of the third component.

[0083] The top surface of the fifth base 61 is fixedly provided with several support columns 69 on the outer periphery of the fifth positioning groove 63. The top of the support columns 69 is fixedly connected to the second positioning plate 611 by the twelfth bolt 610. The bottom surface of the second positioning plate 611 is provided with a sixth positioning groove 612 for positioning the top of the fourth component. The bottom surface of the second positioning plate 611 is evenly distributed with several fifth support blocks on the outer periphery of the sixth positioning groove 612. The bottom surface of the fifth support block is provided with a fifth pressure plate between the fourth component and the fifth pressure plate. The fifth pressure plate is fixedly connected to the second positioning plate 611 by the thirteenth bolt, which is located between the fifth support block and the fourth component. An operation hole 613 is opened on the second positioning plate 611 above the inner side of the fourth component.

[0084] In this embodiment, the overall structure of the thin-walled sheet metal component 1 is positioned and installed using the fifth positioning component 6. First, the bottom end of the third component is positioned and fixed using the fifth positioning groove 63 and the fourth pressure plate 65. Then, the inner circumference of the top end of the third component is positioned and supported by the third positioning disc 68, thus completing the positioning and fixing of the third component. The fourth pressure plate 65 is located inside the third component to avoid affecting the welding connection of the first outer sheet metal part 18.

[0085] Then, the first outer sheet metal part 18 is mated and placed on the third component, and the sheet metal connector 19 is mated and placed between the top of the first outer sheet metal part 18 and the top of the third component.

[0086] The fourth component is then positioned and installed on the bottom surface of the second positioning plate 611, and the second positioning plate 611 is then fixedly connected to the top of each support column 69, completing the positioning and installation of the overall structure of the thin-walled sheet metal component 1. This ensures the coaxiality and positional accuracy between the bottom flange 11 and the top flange 111. The first outer sheet metal part 18 and the sheet metal connector 19, where positional accuracy requirements are not high, can be connected by welding.

[0087] The positioning fixture of this application ensures the overall structural accuracy of the thin-walled sheet metal component 1 and ensures the welding quality.

[0088] Furthermore, embodiments of the present invention also provide a welding method for thin-walled sheet metal components, wherein the welding method is a method of welding and connecting thin-walled sheet metal components 1 using the aforementioned welding fixture; the welding method includes the following steps:

[0089] First component welding: The bottom flange 11 and the first inner sheet metal part 12 are positioned by the first positioning component 2, and the bottom flange 11 and the first inner sheet metal part 12 are welded together to form the first component;

[0090] Second component welding: The second inner sheet metal part 13, the third inner sheet metal part 14 and the fourth inner sheet metal part 15 are positioned by the second positioning component 3. The third inner sheet metal part 14 and the fourth inner sheet metal part 15 are welded together first, and then the second inner sheet metal part 13 and the third inner sheet metal part 14 are welded together to form the second component.

[0091] Third component welding: The first component, the second component, the blade limiting sleeve 16 and the blade 17 are positioned by the third positioning component 4. First, the blade limiting sleeve 16 is welded to the first component, and then the blade 17 is welded to the second component to form the third component.

[0092] Fourth component welding: The top flange 111 and the second outer sheet metal part 110 are positioned by the fourth positioning component 5, and the top flange 111 and the second outer sheet metal part 110 are welded together to form the fourth component.

[0093] Thin-walled sheet metal assembly welding: The third assembly, the first outer sheet metal part 18, the sheet metal connector 19 and the fourth assembly are positioned by the fifth positioning assembly 6. First, the first outer sheet metal part 18 is welded to the third assembly. Then, the sheet metal connector 19 is welded to the third assembly and the first outer sheet metal part 18. Finally, the fourth assembly and the sheet metal connector 19 are welded to form the thin-walled sheet metal assembly.

[0094] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0095] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0096] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A welding positioning fixture for thin-walled sheet metal components, characterized in that, include: The first positioning component (2) is used to position the bottom flange (11) and the first inner sheet metal component (12) of the thin-walled sheet metal component (1) so that they are welded together to form the first component; The second positioning component (3) is used to position the second inner sheet metal part (13), the third inner sheet metal part (14) and the fourth inner sheet metal part (15) of the thin-walled sheet metal component (1) so that they are welded together to form the second component. The third positioning component (4) is used to position the first component, the second component, the blade limiting sleeve (16) and the blade (17) so that they are welded together to form the third component; The fourth positioning component (5) is used to position the top flange (111) and the second outer sheet metal part (110) of the thin-walled sheet metal component (1) so that they are welded together to form the fourth component. The fifth positioning component (6) is used to position the third component, the first outer sheet metal part (18), the sheet metal connector (19) and the fourth component so that they are welded together to form a thin-walled sheet metal component (1).

2. The welding positioning fixture for thin-walled sheet metal components according to claim 1, characterized in that, The first positioning component (2) includes a first base (21); a first column (22) is fixedly disposed on the top surface of the first base (21); The top surface of the first base (21) is provided with a first positioning groove (23) around the outer periphery of the first column (22) for positioning the bottom flange (11); the top surface of the first base (21) is provided with a plurality of first support blocks (24) evenly distributed around the outer periphery of the first positioning groove (23); a first pressure plate (25) is provided between the top surface of the first support block (24) and the bottom flange (11); the first pressure plate (25) is fixedly connected to the first base (21) by a first bolt (26); the first bolt (26) is located between the first support block (24) and the bottom flange (11); a first pad (27) is provided inside the bottom flange (11) below the first pressure plate (25); A first positioning plate (28) is fixedly sleeved on the first column (22) for positioning and supporting the first inner sheet metal part (12); a first cover plate (29) is detachably sleeved on the top of the first column (22) for pressing and fixing the first inner sheet metal part (12); the first cover plate (29) is fixedly connected to the first positioning plate (28) by a second bolt (210).

3. The welding positioning fixture for thin-walled sheet metal components according to claim 1, characterized in that, The second positioning component (3) includes a second base (31); a first positioning protrusion (32) is fixedly provided on the top surface of the second base (31) for positioning the fourth inner sheet metal part (15); a second column (33) is fixedly provided on the top surface of the first positioning protrusion (32). A first pressure ring (34) is provided above the second base (31) on the outer periphery of the first positioning protrusion (32) for pressing and fixing the fourth inner sheet metal part (15); the first pressure ring (34) is fixedly connected to the second base (31) by a third bolt (35); The second column (33) is detachably fitted with a support plate (36) for positioning and supporting the third inner sheet metal part (14); a support step (37) is provided on the second column (33) below the support plate (36), and the support plate (36) is fixedly connected to the first positioning protrusion (32) by a fourth bolt (38); The top of the second column (33) is fixedly connected to the second positioning plate (310) by the fifth bolt (39), which is used to position the second inner sheet metal part (13).

4. The welding positioning fixture for thin-walled sheet metal components according to claim 1, characterized in that, The third positioning component (4) includes a third base (41); a third column (42) is fixedly provided on the top surface of the third base (41); The top surface of the third base (41) is provided with a second positioning groove (43) around the outer periphery of the third column (42) for positioning the bottom of the first component; the top surface of the third base (41) is provided with a plurality of second support blocks (44) evenly distributed around the outer periphery of the second positioning groove (43); a second pressure plate (45) is provided between the top surface of the second support block (44) and the first component; the second pressure plate (45) is fixedly connected to the third base (41) by a sixth bolt (46); the sixth bolt (46) is located between the second support block (44) and the first component; a second pad (47) is provided below the second pressure plate (45) inside the first component; The top of the third column (42) is fixedly connected to the first positioning plate (49) by the seventh bolt (48); the bottom surface of the first positioning plate (49) is provided with a third positioning groove (410) around the outer periphery of the third column (42) for positioning the top of the second component; a support ring (411) is fixedly provided around the bottom surface of the first positioning plate (49) around the outer periphery of the third positioning groove (410), and a second pressure ring (412) is provided between the bottom surface of the support ring (411) and the second component. The second pressure ring (412) is fixedly connected to the first positioning plate (49) by the eighth bolt (413), and the eighth bolt (413) is located between the support ring (411) and the second component; a washer ring (414) is provided inside the second component above the second pressure ring (412).

5. The welding positioning fixture for thin-walled sheet metal components according to claim 1, characterized in that, The fourth positioning component (5) includes a fourth base (51); the top surface of the fourth base (51) is fixedly provided with a second positioning protrusion (52) for positioning the second outer sheet metal part (110); The top surface of the fourth base (51) is provided with a fourth positioning groove (53) around the outer periphery of the second positioning protrusion (52) for positioning the top flange (111); the top surface of the fourth base (51) is provided with a plurality of third support blocks (54) evenly distributed around the outer periphery of the fourth positioning groove (53); a third pressure plate (55) is provided between the top surface of the third support block (54) and the top flange (111); the third pressure plate (55) is fixedly connected to the fourth base (51) by a ninth bolt (56); the ninth bolt (56) is located between the third support block (54) and the top flange (111).

6. The welding positioning fixture for thin-walled sheet metal components according to claim 1, characterized in that, The fifth positioning component (6) includes a fifth base (61), and a fourth column (62) is fixedly installed on the top surface of the fifth base (61); The top surface of the fifth base (61) is provided with a fifth positioning groove (63) around the outer periphery of the fourth column (62) for positioning the bottom of the third component; the top surface of the fifth base (61) is provided with a plurality of fourth support blocks (64) evenly distributed around the inner periphery of the fifth positioning groove (63); a fourth pressure plate (65) is provided between the top surface of the fourth support block (64) and the inner side of the third component; the fourth pressure plate (65) is fixedly connected to the fifth base (61) by a tenth bolt (66); the tenth bolt (66) is located between the fourth support block (64) and the third component; the top of the fourth column (62) is fixedly connected to a third positioning plate (68) by an eleventh bolt (67) for positioning and supporting the inner periphery of the top of the third component; The top surface of the fifth base (61) is fixedly provided with several pillars (69) on the outer periphery of the fifth positioning groove (63). The top ends of the several pillars (69) are fixedly connected to the second positioning plate (611) by the twelfth bolt (610). The bottom surface of the second positioning plate (611) is provided with a ring of sixth positioning grooves (612) for positioning the top of the fourth component. The bottom surface of the second positioning plate (611) is provided with several fifth support blocks evenly distributed on the outer periphery of the sixth positioning groove (612). The bottom surface of the fifth support block is provided with a fifth pressure plate between the fourth component and the fourth component. The fifth pressure plate is fixedly connected to the second positioning plate (611) by the thirteenth bolt, which is located between the fifth support block and the fourth component. An operation hole (613) is provided on the second positioning plate (611) above the inner side of the fourth component.

7. A welding method for thin-walled sheet metal components, characterized in that, The welding method is a method of welding and connecting thin-walled sheet metal components (1) using the welding positioning fixture described in any one of claims 1-6.

8. The welding method for thin-walled sheet metal components according to claim 7, characterized in that, Includes the following steps: First component welding: The bottom flange (11) and the first inner sheet metal part (12) are positioned by the first positioning component (2), and the bottom flange (11) and the first inner sheet metal part (12) are welded together to form the first component; Second component welding: The second inner sheet metal part (13), the third inner sheet metal part (14) and the fourth inner sheet metal part (15) are positioned by the second positioning component (3). First, the third inner sheet metal part (14) and the fourth inner sheet metal part (15) are welded together, and then the second inner sheet metal part (13) and the third inner sheet metal part (14) are welded together to form the second component. Third component welding: The first component, the second component, the blade limiting sleeve (16) and the blade (17) are positioned by the third positioning component (4). First, the blade limiting sleeve (16) is welded to the first component, and then the blade (17) is welded to the second component to form the third component. Fourth component welding: The top flange (111) and the second outer sheet metal part (110) are positioned by the fourth positioning component (5), and the top flange (111) and the second outer sheet metal part (110) are welded together to form the fourth component; Thin-walled sheet metal assembly (1) welding: The third assembly, the first outer sheet metal part (18), the sheet metal connector (19) and the fourth assembly are positioned by the fifth positioning assembly (6). First, the first outer sheet metal part (18) is welded to the third assembly. Then, the sheet metal connector (19) is welded to the third assembly and the first outer sheet metal part (18). Finally, the fourth assembly and the sheet metal connector (19) are welded to form the thin-walled sheet metal assembly (1).

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