A welding fixture

Abstract

This application relates to a welding fixture in the field of mechanical manufacturing technology. It includes a mounting base with a first support shaft and a second support shaft on it. The first support shaft has a position adjustment component and a connecting component, while the second support shaft has a height adjustment component and a distance adjustment component. Welding fixing plates are detachably connected to the adjacent sides of the connecting component and the distance adjustment component. Each of the two welding fixing plates has a first boss surface and a second boss surface on its adjacent sides, forming a snap-fit ​​engagement with a flange and one end of a shaped tube, respectively. The welding fixing plates have flange fixing holes and welding pre-drilled holes. Positioning bolts and positioning nuts are provided in the flange fixing holes, with the positioning bolts passing through the flange fixing holes and the flange and threadedly connected to the positioning nuts. This application enables efficient and precise welding of shaped tubes and flanges.

Description

Technical Field

[0001] This application relates to the field of mechanical manufacturing technology, and in particular to a welding fixture. Background Technology

[0002] Currently, ventilation fans, as an important piece of equipment, are widely used in various industries. Their normal operation plays a crucial role in ensuring air quality in the production environment and stable equipment operation. The inlet / outlet of a ventilation fan typically needs to be connected to a duct system to achieve air transport and circulation. However, in some special cases, such as when space is limited or old equipment is being modified, the connection process between the inlet / outlet and the duct system faces many challenges. This necessitates the fabrication of special eccentric, asymmetrical, irregularly shaped pipe flanges to meet actual installation requirements.

[0003] In traditional mechanical manufacturing, there is often a lack of effective auxiliary tools for welding irregularly shaped pipes and flanges. Workers mostly rely on experience to operate manually, first aligning the irregularly shaped pipes and flanges, and then using simple clamps for temporary fixation. During the welding process, workers need to constantly adjust the position and angle to ensure the accuracy of the welding as much as possible.

[0004] However, existing technologies have significant drawbacks in welding irregularly shaped pipes and flanges. Manual operation and the use of simple clamps mean that the welding accuracy relies entirely on the worker's experience and skill level, making it difficult to guarantee high welding precision for every product. Furthermore, production efficiency is relatively low. Even slight misalignment during welding can lead to flange deformation, causing the fan and duct system to fail to connect properly, thus affecting the normal operation of the entire ventilation system. Therefore, to address the problem of low welding precision in traditional manual operation methods for irregularly shaped pipes and flanges, this application proposes a welding fixture. Utility Model Content

[0005] To address the issue of low welding accuracy between irregularly shaped pipes and flanges under traditional manual operation, this application provides a welding fixture.

[0006] This application provides a welding fixture, which adopts the following technical solution: A welding fixture includes a mounting base, on which a first support shaft and a second support shaft are respectively arranged vertically on both sides along the width direction of the mounting base. A position adjustment component is provided at the end of the first support shaft near the mounting base, and a connecting component is provided at the end of the first support shaft away from the mounting base. A height adjustment component and a distance adjustment component are provided on the second support shaft. Welding fixing plates are detachably connected to the sides of the connecting component and the distance adjustment component that are close to each other. A first boss surface and a second boss surface are provided on the sides of the two welding fixing plates that are close to each other, and the first boss surface and the second boss surface respectively form a snap-fit ​​engagement with a flange and one end of a shaped tube. The welding fixing plate has a flange fixing hole and a welding pre-drilled hole. A positioning bolt and a positioning nut are provided on the flange fixing hole, and the positioning bolt passes through the flange fixing hole and the flange and is threadedly connected to the positioning nut.

[0007] By adopting the above technical solution, the first and second support shafts set on the mounting base provide a support foundation for subsequent components. The position adjustment component can adjust the position of the first support shaft in the horizontal direction, so that the welding fixture can adapt to different installation requirements. The connecting component facilitates the connection of the welding fixing plate. The height adjustment component can adjust the height of the distance adjustment component, increasing the flexibility of the welding fixture. The distance adjustment component can change the distance between the two welding fixing plates, thereby adapting to flanges and special-shaped pipes of different sizes. The welding fixing plate forms a snap-fit ​​engagement with the flange and special-shaped pipe through the first boss surface and the second boss surface, respectively. The positioning bolts and positioning nuts further fix the flange through the flange fixing holes, ensuring the accurate relative position of the flange and special-shaped pipe during the welding process, improving welding precision. The welding reserved holes facilitate welding operations, thereby solving the problem of low welding precision of special-shaped pipes and flanges under the traditional manual operation mode, and improving welding efficiency and quality.

[0008] Preferably, the position adjustment assembly includes a sliding base, a sliding bolt, and a fixing nut. The sliding base is fixedly connected to one end of the first support shaft near the mounting base, and the sliding bolt passes through the sliding base and is threadedly connected to the fixing nut. The mounting base has a sliding track along the length of the mounting base on one side near the first support shaft, and the sliding bolt and the sliding track form an embedded sliding fit.

[0009] By adopting the above technical solution, the sliding base is fixed at one end of the first support shaft near the mounting base. When the fixing nut is loosened, the sliding bolts passing through the sliding base can be embedded in the sliding track on the mounting base, thereby driving the first support shaft to move along the length of the mounting base, realizing flexible position adjustment. After the adjustment is in place, tightening the fixing nut can stably fix the first support shaft in the required position, which helps to accurately align the welding object, improve the adaptability of the welding fixture to different size and position requirements, and thus improve the welding accuracy and efficiency of irregular pipes and flanges.

[0010] Preferably, the connecting assembly includes a clamp and a connecting shaft. The clamp is detachably connected to the first support shaft, and the connecting shaft is fixedly connected in the horizontal direction to the side of the clamp near the second support shaft. The end of the connecting shaft near the second support shaft is detachably connected to any welding fixing plate.

[0011] By adopting the above technical solution, the connecting shaft is detachably connected to the first support shaft using clamps, which facilitates the installation and disassembly of the connecting components. The horizontal setting of the connecting shaft ensures the accurate installation position of the welding fixing plate. The detachable connection between the connecting shaft and the welding fixing plate makes it easy to replace the welding fixing plate to adapt to the welding of flanges and special-shaped pipes of different specifications.

[0012] Preferably, the distance adjustment assembly includes an adjustment shaft, a gear, an adjustment handle, and a support housing. The support housing is disposed on the height adjustment assembly. Both ends of the adjustment shaft pass through the support housing in a horizontal direction, and the end of the adjustment shaft near the first support shaft is detachably connected to any welded fixing plate. Several adjustment teeth are provided on the adjustment shaft along its axial direction. The gear is rotatably connected to the support housing in a horizontal direction, and the gear meshes with the adjustment teeth. The rotation axis of the gear is perpendicular to the axial direction of the adjustment shaft, and the side of the gear away from the height adjustment assembly is coaxially fixedly connected to the adjustment handle.

[0013] By adopting the above technical solution, the adjusting handle is rotated and meshes with the gear, causing the adjusting shaft to move along the support housing, thereby driving the welding fixing plate connected to it to move. The distance between the two welding fixing plates can be flexibly adjusted to adapt to welding of different sized irregular pipes and flanges, facilitating welding operations on products of different specifications, improving the versatility and practicality of the welding fixture. At the same time, the adjusting shaft and the welding fixing plate are detachably connected, making it easy to replace different welding fixing plates to adapt to different welding needs, further enhancing the flexibility of the fixture.

[0014] Preferably, the height adjustment assembly includes a lifting block and a driving component. The lifting block slides with the second support shaft in the vertical direction. The driving component is fixedly connected to the side of the mounting base near the second support shaft, and the output shaft of the driving component is fixedly connected to the lifting block. The support housing is fixedly connected to the lifting block in the horizontal direction.

[0015] By adopting the above technical solution, the lifting block is driven to slide vertically along the second support axis by the driving component, and the distance adjustment component and the welding fixing plate connected thereto achieve height adjustment, so that the welding fixture can adapt to the welding work of irregular pipes and flanges with different height requirements, thereby improving the applicability and flexibility of the welding fixture.

[0016] Preferably, a limiting surface is formed on the side of the adjusting shaft away from the adjusting teeth along the axial direction of the adjusting shaft, and a limiting plate parallel to the limiting surface is provided inside the supporting housing, and the limiting plate and the limiting surface form a sliding fit.

[0017] By adopting the above technical solution, a limiting surface is opened on the adjusting shaft and a limiting plate is set in the support housing to form a sliding fit with it. The limiting plate can guide the adjusting shaft, thereby ensuring that the adjusting shaft maintains a stable linear motion trajectory during movement and avoiding shaking or deviation of the adjusting shaft.

[0018] Preferably, each of the two welding fixing discs is provided with a sleeve at the detachable connection point between the connecting component and the distance adjustment component, and each of the welding fixing discs is sleeved on the corresponding sleeve.

[0019] By adopting the above technical solution, the sleeve allows the two welding fixing plates to be detachably connected and rotated at the same time. This makes it convenient for workers to complete all subsequent welding work after spot welding the special-shaped tube to the flange at both ends of the special-shaped tube through the welding reserved holes.

[0020] Preferably, the welding fixing plate includes an arc-shaped block and a three-way connector. Multiple arc-shaped blocks are provided, and any one of the arc-shaped blocks is detachably connected to the connecting component or the distance adjustment component through the three-way connector.

[0021] By adopting the above technical solution, the welding fixing plate uses multiple arc blocks to form a detachable connection with the connecting component or distance adjustment component through a three-way connector. This makes it easy to replace the appropriate arc blocks according to different specifications of flanges and special-shaped pipes to form welding fixing plates of corresponding sizes and shapes, improving the versatility and flexibility of the tooling. The detachable structure also makes it easy to replace and repair damaged or worn arc blocks individually, reducing maintenance costs.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The first and second support shafts on the mounting base provide a support foundation. The position adjustment component can adjust the position of the first support shaft in the horizontal direction. The connecting component facilitates the connection of the welding fixing plate. The height adjustment component can adjust the height of the distance adjustment component. The distance adjustment component can change the distance between the two welding fixing plates. The combination of the above structures allows the tooling to adapt to different installation requirements, height requirements, and flanges and special-shaped pipes of different sizes. The welding fixing plate clamps the flange and special-shaped pipe through the first boss surface and the second boss surface, and further fixes the flange through the flange fixing holes combined with positioning bolts and positioning nuts to ensure accurate welding position. The welding reserved holes facilitate welding operation and improve welding accuracy and efficiency. 2. The sliding bolts of the position adjustment component slide within the sliding track, driving the first support shaft to move and securing it with fixing bolts. This helps to accurately align the welding object. The clamps of the connecting component facilitate installation and disassembly. The connecting shaft ensures accurate installation of the welding fixing plate and facilitates easy replacement. The distance adjustment component moves the adjustment shaft by adjusting the gear through the adjustment handle, thereby adjusting the distance between the two welding fixing plates to accommodate welding needs of different sizes. The limiting surface of the adjustment shaft cooperates with the limiting plate to ensure stable linear movement. The height adjustment component drives the lifting block through the drive component to achieve height adjustment of the distance adjustment component and the welding fixing plate. The welding fixing plate can be rotated through the sleeve, making it convenient for workers to complete all welding work. At the same time, the welding fixing plate uses multiple arc blocks and three-way connectors for detachable connection, which facilitates replacement and individual maintenance according to different specifications, reducing maintenance costs. Attached Figure Description

[0023] Figure 1 This is an isometric schematic diagram of the main overall structure in the embodiments of this application; Figure 2 yes Figure 1 The enlarged view of part A mainly shows the structure of the first and second boss surfaces; Figure 3 This is an isometric schematic diagram of the first support shaft structure, which is the main feature of this application embodiment; Figure 4 This is an isometric schematic diagram of the second support shaft structure, which is the main feature of this application embodiment; Figure 5 This is a partial isometric schematic diagram of the internal structure of the supporting shell, which is the main feature of this application embodiment; Figure 6 This is a partial exploded view of the sleeve structure in the embodiments of this application (taking the adjusting shaft as an example).

[0024] Reference numerals: 1. Mounting base; 11. Sliding rail; 111. Slide rail; 2. First support shaft; 21. Position adjustment assembly; 211. Sliding base; 212. Sliding bolt; 213. Fixing nut; 22. Connecting assembly; 221. Clamp; 222. Connecting shaft; 2221. First screw; 2222. First adjusting nut; 3. Second support shaft; 31. Height adjustment assembly; 311. Lifting block; 312. Drive component; 32. Distance adjustment assembly; 321. Adjusting shaft; 3211. Second screw; 3212, Second adjusting nut; 3213, Adjusting gear; 3214, Limiting surface; 322, Gear; 3221, Rotating shaft; 323, Adjusting handle; 324, Support housing; 3241, Limiting plate; 325, Rotation damping; 33, Cut surface; 4, Welding fixing plate; 41, First boss surface; 42, Second boss surface; 43, Flange fixing hole; 431, Positioning bolt; 432, Positioning nut; 44, Welding reserved hole; 45, Arc block; 46, Three-way connector; 5, Sleeve. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail.

[0026] This application discloses a welding fixture.

[0027] Reference Figure 1 and Figure 2 A welding fixture includes a mounting base 1, on which a first support shaft 2 and a second support shaft 3 are respectively arranged vertically on both sides along the width direction of the mounting base 1. A position adjustment component 21 is provided at the end of the first support shaft 2 near the mounting base 1, and a connecting component 22 is provided at the end of the first support shaft 2 away from the mounting base 1. In this embodiment, the second support shaft 3 is fixedly connected to the mounting base 1 by welding. A height adjustment component 31 is provided on the second support shaft 3, and a distance adjustment component 32 is provided on the height adjustment component 31. The connecting component 22 and the distance adjustment component 32 are detachable on their respective adjacent sides. A welding fixing plate 4 is provided. Each of the two welding fixing plates 4 has a first boss surface 41 and a second boss surface 42 on one side that is close to each other. The first boss surface 41 and the second boss surface 42 respectively form a snap-fit ​​engagement with the flange and one end of the special-shaped tube. The welding fixing plate 4 is provided with a flange fixing hole 43 and a welding reserved hole 44. In the embodiment of this application, multiple flange fixing holes 43 and welding reserved holes 44 are arranged in a circumferential array along the welding fixing plate 4. Each flange fixing hole 43 is provided with a positioning bolt 431 and a positioning nut 432. The positioning bolt 431 passes through the flange fixing hole 43 and the flange and is threadedly connected to the positioning nut 432.

[0028] In practical use, the mounting base 1, together with the first support shaft 2 and the second support shaft 3, provides a support foundation for subsequent components. The position adjustment component 21 can adjust the position of the first support shaft 2 in the horizontal direction, thereby adjusting the position of the connecting component 22 and the welding fixing plate 4 on the first support shaft 2. The height adjustment component 31, together with the distance adjustment component 32, can adjust the height of the distance adjustment component 32 and the distance between the two welding fixing plates 4, thereby adapting to flanges and special-shaped pipes of different sizes. The flange is snapped onto the welding fixing plate 4 through the first boss surface 41. At the same time, the positioning bolt 431 and the positioning nut 432 further fix the flange through the flange fixing hole 43. The thickness of the flange itself, combined with the second boss surface 42, forms a groove, making the snap-fit ​​between the special-shaped pipe and the second boss surface 42 more stable. The welding reserved hole 44 facilitates spot welding fixation by the staff.

[0029] Reference Figure 1 and Figure 3 The welding fixing plate 4 includes an arc-shaped block 45 and a three-way connector 46. In this embodiment, three arc-shaped blocks 45 are provided. Any one of the arc-shaped blocks 45 is detachably connected to the three-way connector 46 by bolts and nuts. The three-way connector 46 is also detachably connected to the connecting assembly 22 or the distance adjustment assembly 32. In actual use, the welding fixing plate 4 is made up of multiple arc-shaped blocks 45 spliced ​​together. Any one of the arc-shaped blocks 45 is detachably connected to the connecting assembly 22 or the distance adjustment assembly 32 by the three-way connector 46. This makes it easy to replace the appropriate arc-shaped block 45 according to different specifications of flanges and special-shaped pipes. The detachable connection also makes it easy to replace and repair damaged or worn arc-shaped blocks 45 individually, reducing maintenance costs.

[0030] Reference Figure 1 and Figure 3 The position adjustment component 21 includes a sliding base 211, a sliding bolt 212, and a fixing nut 213. The sliding base 211 is fixedly connected to one end of the first support shaft 2 near the mounting base 1 by welding. The sliding bolt 212 passes through the sliding base 211 from the side of the sliding base 211 away from the first support shaft 2 and is threadedly connected to the fixing nut 213. In this embodiment, four sliding bolts 212 and four fixing nuts 213 are provided and are distributed in a rectangular array on the sliding base 211. The mounting base 1 near the first support shaft 2 has a sliding track 11 along the length direction of the mounting base 1. In this embodiment, the sliding track 11 includes two parallel slide rails 111, and any sliding bolt 212 forms an embedded sliding fit with any slide rail 111.

[0031] In practical use, after loosening the fixing nut 213, the sliding bolt 212 passing through the sliding base 211 can be embedded in the sliding track 11 on the mounting base 1, thereby driving the first support shaft 2 to move along the length direction of the mounting base 1. When adjusted to a suitable position, the fixing nut 213 can be tightened to stably fix the first support shaft 2 in the required position, which helps to accurately align the welding object.

[0032] Reference Figure 1 and Figure 3 The connecting assembly 22 includes a clamp 221 and a connecting shaft 222. The clamp 221 is detachably connected to the first support shaft 2 by bolts and nuts. The connecting shaft 222 is horizontally fixedly connected to the side of the clamp 221 near the second support shaft 3 by welding. The end of the connecting shaft 222 near the second support shaft 3 is detachably connected to any welding fixing plate 4. In this embodiment, the end of the connecting shaft 222 near the second support shaft 3 is machined with a first screw 2221. A three-way connector 46 is threaded through any welding fixing plate 4 and connected to a first adjusting nut 2222. In actual use, the clamp 221 detachably connects the connecting shaft 222 to the first support shaft 2, which facilitates the installation and disassembly of the connecting assembly 22. The first screw 2221 is threaded through the three-way connector 46 of any welding fixing plate 4 and connected to a first adjusting nut 2222, which realizes the detachable connection between the welding fixing plate 4 and the connecting shaft 222, making it convenient to replace the welding fixing plate 4 to adapt to the welding of flanges and special-shaped pipes of different specifications.

[0033] Reference Figure 1 and Figure 4 The height adjustment component 31 includes a lifting block 311 and a driving component 312. The lifting block 311 slides with the second support shaft 3 in the vertical direction. In this embodiment, the second support shaft 3 has a cross-section 33 along its axial direction, and the lifting block 311 passes through the second support shaft 3 to form a sliding engagement with it. The driving component 312 is fixedly connected to the mounting base 1 near the second support shaft 3 by bolts, and the output shaft of the driving component 312 is fixedly connected to the lifting block 311 near the mounting base 1 by bolts. In this embodiment, the driving component 312 is a push rod motor. In actual use, the driving component 312 drives the lifting block 311 to slide along the axial direction of the second support shaft 3, so that the distance adjustment component 32 and the welded fixing plate 4 connected thereto can achieve height adjustment. The cross-section 33 can prevent the lifting block 311 from rotating when sliding on the second support shaft 3, thereby enhancing the stability during the height adjustment process.

[0034] Reference Figure 4 and Figure 5The distance adjustment assembly 32 includes an adjustment shaft 321, a gear 322, an adjustment handle 323, and a support housing 324. The support housing 324 is horizontally fixedly connected to the lifting block 311 by welding. Both ends of the adjustment shaft 321 pass through the support housing 324 horizontally, and the end of the adjustment shaft 321 near the first support shaft 2 is detachably connected to any of the welding fixing plates 4. In this embodiment, the end of the adjustment shaft 321 near the first support shaft 2 is machined to have a second screw 3211. The second screw 3211 passes through a three-way connector 46 on any of the welding fixing plates 4 and is threadedly connected to a second adjusting nut 3212. The adjusting shaft 321 has a plurality of adjusting teeth 3213 along its axial direction, and the gear 322 meshes with the adjusting teeth 3213. In this embodiment, the gear 322 is coaxially fixedly connected to the rotating shaft 3221, and the rotation axis of the rotating shaft 3221 is perpendicular to the axial direction of the adjusting shaft 321. One end of the rotating shaft 3221 near the lifting block 311 is rotatably connected to the support housing 324, and the other end passes through the support housing 324 and is coaxially fixedly connected to the adjusting handle 323. A rotation damping 325 is provided between the adjusting handle 323 and the support housing 324, and the rotation damping 325 is coaxially fixedly connected to the rotating shaft 3221.

[0035] In practical use, the support housing 324 moves up and down with the lifting block 311, and the two ends of the adjusting shaft 321 pass through the support housing 324, thereby realizing the height adjustment of the welding fixing plate 4 connected to the adjusting shaft 321. The second screw 3211 passes through the three-way connector 46 of any welding fixing plate 4 and is threadedly connected to the second adjusting nut 3212, realizing the detachable connection between the welding fixing plate 4 and the adjusting shaft 321. Rotating the adjusting handle 323 drives the gear 322 that meshes with the adjusting gear 3213, which allows the adjusting shaft 321 to move along the support housing 324, thereby driving the welding fixing plate 4 connected to it to move, realizing the flexible adjustment of the distance between the two welding fixing plates 4. The rotation damping 325 prevents the adjusting handle 323 from loosening and causing the gear 322 to rotate, resulting in a change in the distance between the two welding fixing plates 4.

[0036] Reference Figure 4 and Figure 5 The adjusting shaft 321 has a limiting surface 3214 on the side opposite to the adjusting tooth 3213 along the axial direction of the adjusting shaft 321. The supporting housing 324 is provided with a limiting plate 3241 parallel to the limiting surface 3214, and the limiting plate 3241 and the limiting surface 3214 form a sliding fit. In actual use, the limiting plate 3241 can guide the adjusting shaft 321, thereby ensuring that the adjusting shaft 321 maintains a stable linear motion trajectory during movement and avoiding shaking or deviation of the adjusting shaft 321.

[0037] Reference Figure 4and Figure 6 Each of the two welding fixing discs 4 is provided with a sleeve 5 at the detachable connection point between the connecting component 22 and the distance adjustment component 32. In this embodiment, the two sleeves 5 are respectively fitted onto the first screw 2221 and the second screw 3211, and the three-way connector 46 on any of the welding fixing discs 4 is fitted onto the corresponding sleeve 5. In actual use, after loosening the first adjusting nut 2222 or the second adjusting nut 3212, the three-way connector 46 fitted onto the sleeve 5 can drive the welding fixing disc 4 to rotate. After the worker performs spot welding through the welding reserved hole 44, the first support shaft 2 and the welding fixing disc 4 connected thereto can be slid aside to leave a certain operating space, thereby facilitating the rotation of the welding fixing disc 4 to complete all subsequent welding work.

[0038] The implementation principle of this application embodiment is as follows: The mounting base 1, the first support shaft 2, and the second support shaft 3 are combined to provide a support foundation for subsequent components. After the fixing nut 213 in the position adjustment component 21 is loosened, the sliding bolt 212 passing through the sliding base 211 can be embedded in the sliding track 11 on the mounting base 1, thereby driving the first support shaft 2 to move along the length direction of the mounting base 1. At the same time, when it is adjusted to a suitable position, the fixing nut 213 can be tightened to fix the first support shaft 2 in the required position. The connecting component 22 facilitates the connection of the welding fixing plate 4. The clamp 221 detachably connects the connecting shaft 222 to the first support shaft 2, which facilitates installation and disassembly. The first screw 2221 on the connecting shaft 222 passes through the three-way connecting piece 46 of any welding fixing plate 4 and is threadedly connected to the first adjusting nut 2222, realizing the detachable connection between the welding fixing plate 4 and the connecting shaft 222. The height adjustment component 31 can adjust the height of the distance adjustment component 32. The driving component 312 drives the lifting block 311 to slide along the axial direction of the second support shaft 3, thereby driving the distance adjustment component 32 and the welding fixing plate 4 connected thereto to rise and fall. The cut surface 33 can prevent the lifting block 311 from rotating during sliding. The support housing 324 in the distance adjustment component 32 moves up and down with the lifting block 311, thereby realizing the height adjustment of the adjustment shaft 321 and the welding fixing plate 4. The second screw 3211 on the adjustment shaft 321 passes through the three-way connector 46 of any welding fixing plate 4 and is threadedly connected to the first Two adjusting nuts 3212 enable detachable connection between the welding fixing plate 4 and the adjusting shaft 321. The adjusting handle 323 drives the gear 322 to move the adjusting shaft 321 along the support housing 324, thereby moving the welding fixing plate 4 connected to it. This allows for flexible adjustment of the distance between the two welding fixing plates 4. The rotation damping 325 ensures that the distance between the two welding fixing plates 4 does not change. The limiting plate 3241 guides the adjusting shaft 321, ensuring that the adjusting shaft 321 maintains a stable linear motion trajectory during movement and preventing the adjusting shaft 321 from shaking or deviating. The welding fixing plate 4 uses the first boss surface 41 and the second boss surface 42 to clamp the flange and the special-shaped pipe, and uses the flange fixing hole 43 to fix the flange with the positioning bolt 431 and the positioning nut 432 to ensure accurate welding position. The welding reserved hole 44 facilitates the welding operation of the staff, improves the welding accuracy and efficiency. The welding fixing plate 4 is made of multiple arc blocks 45 spliced ​​together, and any arc block 45 is detachably connected to the first screw 2221 or the second screw 3211 through the three-way connector 46, which is convenient for replacing flanges and special-shaped pipes of different specifications, and also facilitates the individual replacement and repair of damaged or worn arc blocks 45, reducing maintenance costs. Two sleeves 5 are respectively fitted onto the first screw 2221 and the second screw 3211. After loosening the first adjusting nut 2222 or the second adjusting nut 3212, the three-way connector 46 fitted onto the sleeve 5 can drive the welding fixing plate 4 to rotate, so that the workers can perform spot welding through the welding reserved hole 44 and then rotate the welding fixing plate 4 to complete all subsequent welding work.

[0039] 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 welding fixture, characterized in that: The system includes a mounting base (1), and a first support shaft (2) and a second support shaft (3) are respectively arranged vertically on both sides of the mounting base (1) along its width direction. A position adjustment component (21) is provided at the end of the first support shaft (2) near the mounting base (1), and a connecting component (22) is provided at the end of the first support shaft (2) away from the mounting base (1). A height adjustment component (31) is provided on the second support shaft (3), and a distance adjustment component (32) is provided on the height adjustment component (31). The connecting component (22) and the distance adjustment component (32) are close to each other. Each side is detachably connected to a welding fixing plate (4). The two welding fixing plates (4) are provided with a first boss surface (41) and a second boss surface (42) on the side that is close to each other. The first boss surface (41) and the second boss surface (42) respectively form a snap-fit ​​with the flange and one end of the special tube. The welding fixing plate (4) is provided with a flange fixing hole (43) and a welding reserved hole (44). The flange fixing hole (43) is provided with a positioning bolt (431) and a positioning nut (432). The positioning bolt (431) passes through the flange fixing hole (43) and the flange and is threadedly connected to the positioning nut (432).

2. The welding fixture according to claim 1, characterized in that: The position adjustment assembly (21) includes a sliding base (211), a sliding bolt (212), and a fixing nut (213). The sliding base (211) is fixedly connected to one end of the first support shaft (2) near the mounting base. The sliding bolt (212) passes through the sliding base (211) and is threadedly connected to the fixing nut (213). The mounting base (1) has a sliding track (11) on one side near the first support shaft (2) along the length of the mounting base (1). The sliding bolt (212) and the sliding track (11) form an embedded sliding fit.

3. The welding fixture according to claim 1, characterized in that: The connecting assembly (22) includes a clamp (221) and a connecting shaft (222). The clamp (221) is detachably connected to the first support shaft (2). The connecting shaft (222) is fixedly connected to the side of the clamp (221) near the second support shaft (3) in the horizontal direction. The end of the connecting shaft (222) near the second support shaft (3) is detachably connected to any welding fixing plate (4).

4. The welding fixture according to claim 1, characterized in that: The distance adjustment assembly (32) includes an adjustment shaft (321), a gear (322), an adjustment handle (323), and a support housing (324). The support housing (324) is mounted on the height adjustment assembly (31). Both ends of the adjustment shaft (321) pass through the support housing (324) in a horizontal direction. The end of the adjustment shaft (321) near the first support shaft (2) is detachably connected to any welding fixing plate (4). Several adjustment teeth (3213) are provided on the adjustment shaft (321) along the axial direction. The gear (322) is rotatably connected to the support housing (324) in a horizontal direction. The gear (322) meshes with the adjustment teeth (3213). The rotation axis of the gear (322) is perpendicular to the axial direction of the adjustment shaft (321). The side of the gear (322) away from the height adjustment assembly (31) is coaxially fixedly connected to the adjustment handle (323).

5. The welding fixture according to claim 4, characterized in that: The height adjustment assembly (31) includes a lifting block (311) and a driving member (312). The lifting block (311) slides with the second support shaft (3) in the vertical direction. The driving member (312) is fixedly connected to the side of the mounting base (1) near the second support shaft (3), and the output shaft of the driving member (312) is fixedly connected to the lifting block (311). The support housing (324) is fixedly connected to the lifting block (311) in the horizontal direction.

6. The welding fixture according to claim 4, characterized in that: The adjusting shaft (321) has a limiting surface (3214) on the side opposite to the adjusting tooth (3213) along the axial direction of the adjusting shaft (321). The supporting housing (324) is provided with a limiting plate (3241) parallel to the limiting surface (3214), and the limiting plate (3241) and the limiting surface (3214) form a sliding fit.

7. The welding fixture according to claim 1, characterized in that: Each of the two welding fixing discs (4) is provided with a sleeve (5) at the detachable connection point between the connecting component (22) and the distance adjustment component (32), and each of the welding fixing discs (4) is sleeved on the corresponding sleeve (5).

8. The welding fixture according to claim 1, characterized in that: The welding fixing plate (4) includes an arc-shaped block (45) and a three-way connector (46). Multiple arc-shaped blocks (45) are provided, and any one of the arc-shaped blocks (45) is detachably connected to the connecting component (22) or the distance adjustment component (32) through the three-way connector (46).

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