A method of welding a fan housing

Abstract

The application discloses a fan shell welding method, relates to the field of fan assembling technology, and comprises the following steps: determining a positioning tool, manufacturing the positioning tool according to a motor or a bearing box, the positioning tool comprising a positioning support and a positioning support frame fixed on the positioning support; the positioning support simulates the posture of a motor or a bearing box base, and the positioning support frame simulates the posture of a motor output shaft or a bearing box transmission shaft; splicing operation, fixing the positioning support on the mounting position of a mounting seat, and moving the mounting seat or a volute, so that the positioning support frame penetrates into the volute avoiding hole, and the parts of the mounting seat and the volute close to each other abut; welding operation, welding between the mounting seat and the volute. The application has the effects of helping to guarantee the correctness of the relative positions of the mounting seat and the volute after assembly, improving the convenience of fan assembly, and improving the efficiency of fan assembly.

Description

Technical Field

[0001] This application relates to the field of wind turbine assembly technology, and in particular to a method for welding wind turbine casings. Background Technology

[0002] A fan is a machine that uses input mechanical energy to increase gas pressure and discharge gas. It belongs to driven fluid machinery. The fans commonly referred to mainly include ventilators, blowers, wind turbines, etc.

[0003] In related technologies, a fan housing includes a mounting base and a volute. The mounting base includes a mounting position for mounting a drive motor or a bearing housing, wherein the bearing housing includes a drive shaft. In actual production, the mounting base and the volute are manufactured independently. A clearance hole for the drive motor output shaft or the bearing housing drive shaft is opened on the side of the volute near the mounting base. A slotted hole for mounting the drive motor or bearing housing is opened on the mounting position. The slotted hole is positioned along the axis of the clearance hole, and multiple slotted holes are provided. Then, the mounting base and the volute are welded together. Finally, the drive motor or bearing housing is mounted on the mounting position using bolts and the slotted holes. The impeller is placed inside the volute, ensuring that the drive motor output shaft or the bearing housing drive shaft passes through the clearance hole and is coaxially fixed with the impeller.

[0004] Regarding the aforementioned technologies, since the mounting base and the volute are manufactured independently, and after the mounting base and the volute are welded together, there is a certain installation error between the mounting base and the volute. The output shaft of the drive motor or the transmission shaft of the bearing housing mounted on the mounting base will have difficulty passing through the clearance hole on the volute, making the fan assembly difficult and requiring urgent improvement. Summary of the Invention

[0005] In order to improve the problem of assembly errors after welding of the mounting base and volute in related technologies, which makes it difficult to assemble the fan, this application provides a fan casing welding method.

[0006] This application provides a welding method for a wind turbine casing, which adopts the following technical solution:

[0007] A method for welding a wind turbine casing includes the following steps:

[0008] Determine the positioning fixture, and manufacture the positioning fixture according to the motor or bearing housing. The positioning fixture includes a positioning support and a positioning bracket fixed on the positioning support. The positioning support simulates the posture of the motor or bearing housing base, and the positioning bracket simulates the posture of the motor output shaft or bearing housing transmission shaft.

[0009] During the assembly process, the positioning bracket is fixed to the mounting position of the mounting base, and the mounting base or volute is moved so that the positioning bracket is inserted into the clearance hole of the volute, so that the parts of the mounting base and the volute that are close to each other abut.

[0010] Welding operations are performed between the mounting base and the volute.

[0011] By adopting the above technical solution, since the positioning fixture simulates the posture of the motor or bearing housing, after the fan housing is welded, the motor or bearing housing is installed in the mounting position on the mounting base. The output shaft of the motor or the transmission shaft of the bearing housing can pass smoothly through the clearance hole of the volute, which helps to ensure the correctness of the relative position of the mounting base and the volute after assembly, helps to improve the convenience of fan assembly, and helps to improve the efficiency of fan assembly.

[0012] Preferably, in the splicing operation step, after the mounting base and the volute abut each other, spot welding is performed between the mounting base and the volute, and the positioning fixture is removed.

[0013] By adopting the above technical solution, spot welding is performed on the mounting base and the volute, which fixes the mounting base and the volute relatively, and the positioning fixture can be removed. The mounting base and the volute still have the correct relative position, which can reduce the occurrence of the positioning fixture affecting the welding of the wind turbine casing.

[0014] Preferably, a positioning pin is fixed on the positioning support, the positioning pin is inserted into the oblong hole on the mounting position, and multiple positioning pins are provided on the positioning support.

[0015] During the assembly process, each positioning pin is inserted through the corresponding slotted hole on the mounting base.

[0016] By adopting the above technical solution, the positioning pin is engaged with the slotted hole on the mounting position, thereby achieving rapid positioning of the positioning support on the mounting base and helping to ensure the correct positioning of the mounting base and the volute.

[0017] Preferably, in the assembly operation, the mounting base and the volute are assembled using assembly equipment;

[0018] The assembly equipment includes a workbench, on which a first assembly frame is fixed. A sliding frame is slidably disposed on the workbench along a direction close to or away from the first assembly frame. A support frame is slidably disposed on the sliding frame, with the sliding direction of the support frame perpendicular to the sliding direction of the sliding frame. A second assembly frame is slidably disposed on the support frame, with the sliding direction of the second assembly frame perpendicular to the sliding direction of the support frame and the sliding direction of the sliding frame.

[0019] Furthermore, the volute and the mounting base are detachably and fixedly mounted on the first assembly frame and the second assembly frame, respectively.

[0020] By adopting the above technical solution, during the splicing operation, the mounting base can be fixed to the first assembly frame and the volute can be fixed to the second assembly frame, or the volute can be fixed to the first assembly frame and the mounting base can be fixed to the second assembly frame. Then, the sliding frame can be pushed towards one side of the first assembly frame, and the support frame and the second assembly frame will move towards one side of the first assembly frame simultaneously, with the mounting base and the volute approaching each other. Subsequently, the support frame can be slid and the second assembly frame can be raised and lowered, and the sliding frame can be pushed again, so that the positioning bracket passes through the clearance hole of the volute, thereby helping to improve the convenience of moving the mounting base or the volute.

[0021] Preferably, the workbench is further provided with a drive assembly for driving the sliding frame to slide.

[0022] By adopting the above technical solution, the sliding frame is driven by the drive component, which further improves the convenience of moving the mounting base or volute.

[0023] Preferably, the end of the positioning bracket opposite to the positioning support is formed with a tapered guide head.

[0024] By adopting the above technical solution, when the mounting base and the volute are close to each other, the tapered guide head can guide the positioning bracket to pass through the clearance hole more smoothly, which helps to improve the convenience of positioning the mounting base and the volute for positioning operations.

[0025] Preferably, the sliding direction of the second assembly frame is vertical, and an assist spring is provided to abut against the lower side of the second assembly frame and the support frame.

[0026] By adopting the above technical solution, the second assembly frame is vertical, meaning that the sliding direction of both the sliding frame and the main frame is horizontal. When the positioning bracket passes through the clearance hole of the volute, the spring force of the assist spring on the second assembly frame allows the operator to more easily control the lifting and lowering operation of the second assembly frame, which helps to improve the convenience of positioning the mounting base and the volute.

[0027] Preferably, the support frame includes a main frame and a lifting frame. The main frame is slidably connected to the sliding frame. The lifting frame is lifted and lowered on the main frame. The main frame is also provided with a driving component for driving the lifting frame to lift and lower. The second assembly frame is slidably disposed on the lifting frame, and the assist spring is pressed against the lower side of the second assembly frame and the lifting frame.

[0028] By adopting the above technical solution, in practical application, the lifting frame and the second assembly frame can be driven to rise first through the driving component, and the main frame can be slid so that the cone head of the conical guide head is directly facing the inside of the clearance hole; then, the sliding frame is pushed closer to the first assembly frame. At this time, the conical guide head on the positioning bracket will abut against the side wall of the clearance hole and guide the second assembly frame to rise and fall slightly on the lifting frame, and guide the main frame to slide slightly on the sliding frame, so that the mounting seat and the volute can complete the positioning, further improving the convenience of positioning the mounting seat and the volute.

[0029] It is worth mentioning that, in the welding operation of the same size wind turbine casing, the height of the lifting frame and the second assembly frame only needs to be adjusted once by the drive component, and can be used continuously thereafter, which greatly facilitates the positioning operation of the subsequent mounting base and volute.

[0030] Preferably, the sliding direction of both the sliding frame and the support frame is horizontal. The sliding frame has a second sliding groove from top to bottom. The length direction of the second sliding groove is parallel to the sliding direction of the support frame. A graphite pad is attached to the bottom of the second sliding groove. The lower side of the support frame is embedded in the second sliding groove and slides with the second sliding groove. The lower side of the support frame abuts against the graphite pad.

[0031] By adopting the above technical solution, the sliding direction of both the sliding frame and the support frame is horizontal, that is, the sliding direction of the second assembly frame is vertical. In practical applications, the support frame bears the weight of the second assembly frame, mounting base, or volute. With the help of the graphite pad at the bottom of the second slide groove, the ease of sliding of the support frame on the sliding frame is improved.

[0032] Preferably, a push block is slidably disposed on the sliding frame, the sliding direction of the push block is parallel to the sliding direction of the support frame, the sliding frame is provided with a power component for pushing the push block to slide, and a connecting spring is provided between the push block and the support frame, the two ends of the connecting spring being fixed to the push block and the support frame respectively.

[0033] By adopting the above technical solution, in practical applications, the push block can be driven by the power component to move, and the main frame can be moved by the connecting spring, thereby adjusting the position of the second assembly frame in the sliding direction of the main frame, which helps to improve the convenience of sliding the main frame.

[0034] It is worth mentioning that, in the welding operation of the same size wind turbine casing, the position of the main frame only needs to be adjusted once by the power component, and it can be used continuously thereafter, which greatly facilitates the positioning operation of the subsequent mounting base and volute.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. By simulating the posture of the motor or bearing housing with positioning fixtures, and positioning the mounting base and volute by positioning fixtures, it helps to ensure the correctness of the relative position of the mounting base and volute after assembly, improves the convenience of fan assembly, and helps to improve the efficiency of fan assembly.

[0037] 2. By means of an assist spring located between the second assembly frame and the lower side of the lifting frame, and driven by a drive component to lift the lifting frame on the main frame, and by means of a connecting spring located between the push block and the main frame, and driven by a power component to lift the push block and the main frame, the ease of positioning the mounting base and the volute is greatly improved. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the wind turbine casing structure in related technologies;

[0039] Figure 2 This is a flowchart illustrating the welding method for the wind turbine casing, which is the main feature of this embodiment.

[0040] Figure 3 This is a schematic diagram illustrating the main positioning tooling structure in this embodiment;

[0041] Figure 4 This is a schematic diagram illustrating the main structure of the assembly equipment in this embodiment;

[0042] Figure 5 This is a schematic diagram illustrating the mounting base and volute housing installed in the assembly equipment state, which is the main feature of this embodiment.

[0043] Reference numerals: 1. Positioning fixture; 11. Positioning support; 111. Positioning pin; 12. Positioning bracket; 121. Conical guide head; 2. Worktable; 21. First slide groove; 3. First assembly frame; 31. Positioning hole; 4. Sliding frame; 41. Second slide groove; 42. Graphite pad; 5. Drive assembly; 51. Drive motor; 52. First lead screw; 6. Support frame; 61. Main frame; 611. Guide rod; 62. Lifting frame; 621. Sliding groove; 622. 623. Slide rod; 63. Assist spring; 64. Drive component; 651. Third lead screw; 662. Drive handwheel; 7. Power unit; 71. Push block; 72. Connecting spring; 73. Power component; 731. Second lead screw; 732. Power handwheel; 8. Second assembly frame; 9. Fixing frame; 91. Crossbeam; 92. Handle screw; 93. Pressure block; 100. Mounting seat; 101. Mounting position; 102. Waist-shaped hole; 200. Volute; 201. Clearance hole. Detailed Implementation

[0044] The present application will be further described in detail below with reference to the accompanying drawings.

[0045] This application discloses a method for welding a fan casing.

[0046] Reference Figure 2 The welding method for the fan casing includes the following steps:

[0047] S1. Determine the positioning fixture 1.

[0048] See Figure 3 A positioning fixture 1 is fabricated based on the motor or bearing housing. The positioning fixture 1 includes a positioning support 11 and a positioning bracket 12 fixed to the positioning support 11. The positioning support 11 simulates the posture of the motor or bearing housing base, and the positioning bracket 12 simulates the posture of the motor output shaft or bearing housing drive shaft. Further, the positional relationship between the positioning support 11 and the positioning bracket 12 is consistent with the positional relationship between the motor base and the output shaft, or between the bearing housing base and the drive shaft. Furthermore, positioning pins 111 are fixed on the positioning support 11, and at least multiple positioning pins 111 are provided on the positioning support 11. In this embodiment, one positioning pin 111 is provided on each side of the positioning support 11. A tapered guide head 121 is formed at the end of the positioning bracket 12 facing away from the positioning support 11.

[0049] S2, splicing operation.

[0050] S1.1. Assemble the mounting base 100 and the volute 200 using assembly equipment, install the mounting base 100 and the volute 200 on the assembly equipment, and fix the positioning support 11 on the mounting position 101 of the mounting base 100, so that the positioning pin 111 passes through the corresponding oblong hole 102 on the mounting base 100; then, bring the mounting base 100 and the volute 200 closer together, so that the positioning bracket 12 passes through the clearance hole 201 of the volute 200, and so that the mounting base 100 and the volute 200 abut against each other at the position where they are close together.

[0051] Among them, see Figure 4 and Figure 5 The assembly equipment includes a horizontal workbench 2. A first assembly frame 3 is fixed to one side of the workbench 2 along its length, and a sliding frame 4 is slidably mounted on the other side of the workbench 2 along its length. The sliding direction of the sliding frame 4 is parallel to the length direction of the workbench 2, and a drive assembly 5 for driving the sliding frame 4 to slide is also provided on the workbench 2. A support frame 6 is slidably mounted on the sliding frame 4 along the width direction of the workbench 2, and a power device 7 for driving the support frame 6 to slide is also provided on the sliding frame 4. Furthermore, a second assembly frame 8 is slidably mounted on the support frame 6 along the vertical direction near the first assembly frame 3.

[0052] A first slide groove 21 is provided on the worktable 2 along its length. The lower part of the sliding frame 4 is embedded in the first slide groove 21 and slides in cooperation with it. The drive assembly 5 includes a drive motor 51 and a first lead screw 52. The axis of the first lead screw 52 is parallel to the length direction of the first slide groove 21. The first lead screw 52 is rotatably mounted between the two side walls along the length direction of the first slide groove 21. The middle part of the first lead screw 52 passes through the lower part of the sliding frame 4 and is threadedly connected to the sliding frame 4. The drive motor 51 is fixed on the worktable 2, and the output shaft of the drive motor 51 is coaxially fixed with one end of the first lead screw 52.

[0053] The sliding frame 4 is provided with a second sliding groove 41, the length direction of which is parallel to the width direction of the worktable 2. The support frame 6 includes a main frame 61, the lower part of which is embedded in the second sliding groove 41 and slides in cooperation with it. The power unit 7 includes a push block 71, a connecting spring 72, and a power component 73. The push block 71 is embedded in the second sliding groove 41 and slides in cooperation with it. The connecting spring 72 is located between the push block 71 and the main frame 61, and is arranged along the length direction of the second sliding groove 41. Both ends of the connecting spring 72 are fixed to the push block 71 and the main frame 61, respectively. The power component 73 includes a second lead screw 731 and a power handwheel 732. The axial direction of the second lead screw 731 is parallel to the length direction of the second slide groove 41. The second lead screw 731 passes through the side wall of the second slide groove 41 located on the side of the push block 71 opposite to the main frame 61. The second lead screw 731 is threadedly connected to the sliding frame 4. The end of the second lead screw 731 near the push block 71 is rotatably connected to the push block 71, and the power handwheel 732 is fixed to the end of the second lead screw 731 opposite to the push block 71. To improve the ease of sliding the main frame 61, a graphite pad 42 is attached to the bottom of the second slide groove 41, and the lower side of the main frame 61 abuts against the graphite pad 42.

[0054] The support frame 6 also includes a lifting frame 62, which is located above the main frame 61. A guide rod 611 is vertically fixed to the upper side of the main frame 61, and the guide rod 611 passes through the lifting frame 62 and slides in cooperation with the lifting frame 62. The main frame 61 is also provided with a driving component 63 for driving the lifting frame 62 to rise and fall. The driving component 63 includes a third lead screw 631 and a driving handwheel 632. The third lead screw 631 is vertical, and its lower end is rotatably connected to the fixed frame 9. The upper side of the third lead screw 631 passes through the lifting frame 62 and is threadedly connected to the lifting frame 62. The driving handwheel 632 is fixed to the upper end of the third lead screw 631.

[0055] A sliding groove 621 is provided on the side of the lifting frame 62 near the first assembly frame 3. The sliding groove 621 is vertical. A portion of the base frame near the lifting frame 62 is embedded in the sliding groove 621 and slides in cooperation with it. A sliding rod 622 is vertically fixed between the upper and lower side walls of the sliding groove 621. The sliding rod 622 passes through the portion of the second assembly frame 8 within the sliding groove 621 and slides in connection with it. Furthermore, a booster spring 623 is provided in the sliding groove 621 on the lower side of the second assembly frame 8. The booster spring 623 is vertical and is sleeved on the sliding rod 622. Both ends of the booster spring 623 abut against the lower side wall of the sliding groove 621 and the lower side of the second assembly frame 8, respectively.

[0056] To ensure the stability of the positioning fixture 1 on the mounting base 100, the second assembly frame 8 is fixed with a fixing frame 9 on one side of the workbench 2 in the width direction. A crossbeam 91 is fixed on the upper side of the fixing frame 9. The crossbeam 91 extends towards the middle of the second assembly frame 8. A handle screw 92 is threaded from top to bottom on the crossbeam 91. The screw of the handle screw 92 passes through the crossbeam 91, and a pressure block 93 is fixed at the lower end of the handle screw 92.

[0057] In addition, positioning holes 31 are provided on both the first assembly frame 3 and the second assembly frame 8.

[0058] The assembly method for mounting base 100 and volute 200 using assembly equipment is as follows:

[0059] First, the volute 200 is fixed to the upper side of the first assembly frame 3, and the mounting base 100 is fixed to the second assembly frame 8. In this embodiment, the volute 200 is fixed to the first assembly frame 3 by bolts engaging with the positioning holes 31 on the first assembly frame 3, and the volute 200 is fixed to the second assembly frame 8 by bolts engaging with the positioning holes 31 on the second assembly frame 8. In other embodiments, the volute 200 and the mounting base 100 can also be positioned by pins engaging with the corresponding positioning holes 31, and the volute 200 and the mounting base 100 can be clamped by vertical quick clamps on both the first assembly frame 3 and the second assembly frame 8.

[0060] Then, place the positioning support 11 on the mounting base 100, and insert the positioning pin 111 into the corresponding oblong hole 102 on the mounting base 100. Then, turn the handle screw 92 to lower the pressure block 93 and press the positioning support 11 onto the mounting base 100. At this time, the positioning bracket 12 is horizontal and faces the volute 200.

[0061] Then, the drive motor 51 and the first lead screw 52 can work together to drive the sliding frame 4 to move towards the first assembly frame 3, so that the mounting base 100 is close to the volute 200. At this time, the power handwheel 732 and the second lead screw 731 can be rotated to drive the main frame 61 to slide through the push block 71 and the connecting spring 72, and the height of the lifting frame 62 and the second assembly frame 8 can be adjusted by rotating the drive handwheel 632 so that the cone head of the conical guide head 121 is directly facing the inside of the clearance hole 201.

[0062] Finally, the drive motor 51 and the first lead screw 52 continue to drive the sliding frame 4 to move towards the first assembly frame 3, and the conical guide head 121 will gradually penetrate into the clearance hole 201. When the conical surface of the conical guide head 121 abuts against the inner wall of the clearance hole 201 of the volute 200, the conical guide head 121 will pull the second assembly frame 8 up and down, and pull the support frame 6 and the second assembly frame 8 to move along the width direction of the worktable 2 until the positioning bracket 12 penetrates into the clearance hole 201 of the volute 200.

[0063] When the mounting base 100 and the volute 200 come into contact with each other, the drive motor 51 can be turned off.

[0064] S2.2 After the mounting base 100 and the volute 200 abut together, spot welding is performed between the mounting base 100 and the volute 200 to initially fix the mounting base 100 and the volute 200. Then, the handle screw 92 is turned so that the pressure block 93 moves upward away from the positioning work. Thanks to the waist-shaped hole 102 on the mounting base 100, the positioning fixture 1 can be removed from the mounting base 100 relatively easily.

[0065] S3. Welding operation: Full welding is performed between the mounting base 100 and the volute 200, thus completing the welding operation of the fan casing.

[0066] It should be noted that the mounting base 100 and the volute 200 can be unloaded from the first assembly frame 3 and the second assembly frame 8 before the full welding operation is performed. Alternatively, the mounting base 100 and the volute 200 can be fully welded before being unloaded from the first assembly frame 3 and the second assembly frame 8.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for welding a fan casing, characterized in that: Includes the following steps, Determine the positioning fixture (1). Based on the motor or bearing housing, make the positioning fixture (1). The positioning fixture (1) includes a positioning support (11) and a positioning bracket (12) fixed on the positioning support (11). The positioning support (11) simulates the posture of the motor or bearing housing base, and the positioning bracket (12) simulates the posture of the motor output shaft or bearing housing transmission shaft. During the splicing operation, the positioning support (11) is fixed on the mounting position (101) of the mounting base (100), and the mounting base (100) or the volute (200) is moved so that the positioning bracket (12) is inserted into the clearance hole (201) of the volute (200) so that the parts of the mounting base (100) and the volute (200) that are close to each other abut. Welding operation: Welding is performed between the mounting base (100) and the volute (200); The positioning support (11) is fixed with positioning pins (111), and multiple positioning pins (111) are provided on the positioning support (11); During the assembly process, each positioning pin (111) is inserted through the corresponding slot (102) on the mounting base (100).

2. The method for welding a fan casing according to claim 1, characterized in that: In the splicing operation step, after the mounting base (100) and the volute (200) come into contact, spot welding is performed between the mounting base (100) and the volute (200), and the positioning fixture (1) is removed.

3. The method for welding a fan casing according to claim 1, characterized in that: During the assembly operation, the mounting base (100) and the volute (200) are assembled using assembly equipment; The assembly equipment includes a workbench (2), on which a first assembly frame (3) is fixed. A sliding frame (4) is slidably disposed on the workbench (2) in a direction close to or away from the first assembly frame (3). A support frame (6) is slidably disposed on the sliding frame (4). The sliding direction of the support frame (6) is perpendicular to the sliding direction of the sliding frame (4). A second assembly frame (8) is slidably disposed on the support frame (6). The sliding direction of the second assembly frame (8) is perpendicular to the sliding direction of the support frame (6) and the sliding direction of the sliding frame (4). Furthermore, the volute (200) and the mounting base (100) are detachably and fixedly mounted on the first assembly frame (3) and the second assembly frame (8), respectively.

4. The method for welding a fan casing according to claim 3, characterized in that: The workbench (2) is also provided with a drive assembly (5) for driving the sliding frame (4) to slide.

5. A method for welding a fan casing according to claim 3, characterized in that: The positioning bracket (12) has a tapered guide head (121) formed at the end opposite to the positioning support (11).

6. The method for welding a fan casing according to claim 5, characterized in that: The sliding direction of the second assembly frame (8) is vertical, and an assist spring (623) is provided between the lower sides of the second assembly frame (8) and the support frame (6).

7. A method for welding a fan casing according to claim 6, characterized in that: The support frame (6) includes a main frame (61) and a lifting frame (62). The main frame (61) is slidably connected to the sliding frame (4). The lifting frame (62) is lifted and lowered on the main frame (61). The main frame (61) is also provided with a driving component (63) for driving the lifting frame (62) to lift and lower. The second assembly frame (8) is slidably disposed on the lifting frame (62), and the assist spring (623) is pressed against the lower side of the second assembly frame (8) and the lifting frame (62).

8. A method for welding a fan casing according to claim 3 or 7, characterized in that: The sliding direction of the sliding frame (4) and the support frame (6) is horizontal. The sliding frame (4) has a second sliding groove (41) from top to bottom. The length direction of the second sliding groove (41) is parallel to the sliding direction of the support frame (6). A graphite pad (42) is attached to the bottom of the second sliding groove (41). The lower side of the support frame (6) is embedded in the second sliding groove (41) and slides with the second sliding groove (41). The lower side of the support frame (6) abuts against the graphite pad (42).

9. A method for welding a fan casing according to claim 8, characterized in that: A push block (71) is slidably mounted on the sliding frame (4). The sliding direction of the push block (71) is parallel to the sliding direction of the support frame (6). A power component (73) for pushing the push block (71) to slide is provided on the sliding frame (4). A connecting spring (72) is provided between the push block (71) and the main frame (61). The two ends of the connecting spring (72) are fixed to the push block (71) and the main frame (61) respectively.

Images