Positioning device for welding construction engineering sheet metal parts

Abstract

The invention discloses a positioning device for welding construction engineering sheet metal parts, and relates to the technical field of welding equipment.The positioning device comprises a welding table, a welding device and a positioning assembly are installed on the top face of the welding table, the positioning assembly is used for fixing the sheet metal parts, and the welding device is used for welding the sheet metal parts installed on the positioning assembly; the positioning assembly comprises an outer positioning mechanism and an inner positioning mechanism, the inner positioning mechanism is installed at the center of the top face of the outer positioning mechanism, the outer positioning mechanism is installed on the supporting mechanism, a rotation mechanism and an intermittent adjusting mechanism are fixedly installed on the side wall of the supporting mechanism, and the bottom face of the supporting mechanism is rotationally installed on the welding table through a pivotal bearing. By means of a dual-positioning structure with the outer positioning mechanism and the inner positioning mechanism cooperating, welding impact force can be effectively resisted, axial sliding or radial deviation or inclination of the first pipeline can be avoided, then it is guaranteed that welding seams are smooth and continuous, the sealing welding quality is remarkably improved, and meanwhile the surface of the pipeline is prevented from being scratched.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a positioning device for welding sheet metal parts in building engineering. Background Technology

[0002] Existing automatic and semi-automatic electric arc and plasma arc welding machines and other metal cutting and welding equipment are mainly used for welding various sheet metal parts in construction projects, especially suitable for tubular sheet metal parts, such as welding operations for connecting pipes of different diameters. Specific uses include sealing the joints of pipes with different diameters and welding reinforcing ribs at the joints to improve the support and stability of the pipe connection. Positioning devices are mainly used to fix tubular sheet metal parts during the welding process to prevent displacement or offset of the sheet metal parts during welding, providing basic positioning for the welding operation and assisting the welding equipment to complete precise welding. Existing positioning devices mostly adopt a claw structure to achieve single clamping and fixing of the pipe, working with the welding equipment to complete the welding process of pipe joints and reinforcing ribs.

[0003] Existing positioning devices for tubular sheet metal parts only use a single claw device to externally clamp and fix the pipe, without setting an internal support positioning structure. Furthermore, they do not consider the characteristics of the pipe being a semi-sealed structure. Using a single external claw to achieve omnidirectional positioning of the pipe makes it susceptible to the impact force of welding during the welding process, causing axial sliding, radial displacement, or tilting. This results in misalignment at the connection between the two pipes, uneven and discontinuous welds, and affects the quality of the sealing weld.

[0004] Furthermore, tubular sheet metal parts in construction projects come in a variety of specifications, with multiple diameters and lengths for two pipes. However, the existing positioning devices have a fixed structure and cannot flexibly adjust the positioning dimensions according to changes in pipe specifications. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] In view of the problems existing in the above and / or existing positioning devices for welding sheet metal parts in building engineering, the present invention is proposed.

[0007] Therefore, the problem to be solved by the present invention is how to solve the problem that the single external support claw clamping and fixing, without the setting of an internal support positioning structure and not adapted to the semi-sealed structure of the pipeline, is prone to displacement and misalignment during pipeline welding, thus affecting the quality of the weld. At the same time, the fixed structure of the device cannot flexibly adapt to tubular sheet metal parts of different specifications.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a positioning device for welding sheet metal parts in building engineering, comprising a welding table, a welding device and a positioning component mounted on the top surface of the welding table, the positioning component being used to fix the sheet metal parts, the welding device welding the sheet metal parts mounted on the positioning component, the positioning component including an outer positioning mechanism and an inner positioning mechanism, the inner positioning mechanism being installed at the center of the top surface of the outer positioning mechanism, the outer positioning mechanism being mounted on a support mechanism, the side wall of the support mechanism being fixedly mounted with a rotation mechanism and an intermittent adjustment mechanism, and the bottom surface of the support mechanism being rotatably mounted on the welding table via a rotary bearing.

[0009] As a preferred embodiment of the positioning device for welding sheet metal parts in building engineering according to the present invention, the support mechanism includes a support cylinder, a support seat is fixedly installed on the top surface of the support cylinder, the external positioning mechanism is installed on the top surface of the support seat, the bottom surface of the support cylinder is rotatably installed on the welding table through a rotary bearing, and a rotation mechanism and an intermittent adjustment mechanism are fixedly installed on the side walls of the support cylinder respectively.

[0010] As a preferred embodiment of the positioning device for welding sheet metal parts in building engineering according to the present invention, the external positioning mechanism includes a fixed cover and a gear ring. The bottom surface of the gear ring is slidably connected in an annular groove on the support seat via a sliding pin. The side wall of the gear ring is meshed with multiple gears. The multiple gears are rotatably connected in the fixed cover via a rotating shaft. One of the gears is keyed to a transmission rod, and a knob is fixedly installed at the bottom end of the transmission rod. The top surface of the gear ring is provided with a spiral groove, and an external clamping unit is slidably connected in the spiral groove.

[0011] As a preferred embodiment of the positioning device for welding sheet metal parts in building engineering according to the present invention, the outer clamping unit includes a slide block, a sliding column is fixedly connected to the bottom surface of the slide block, the sliding column is slidably connected in a spiral groove, the top surface of the fixing cover is provided with a groove at equal angles around the center, the slide block is slidably connected in the groove, a positioning seat is fixedly installed on the top surface of the slide block, a bearing part is integrally formed on the inner bottom of the positioning seat, a rubber pad is adhered to the bearing part, and a side positioning column is fixedly installed on the inner wall of the positioning seat.

[0012] As a preferred embodiment of the positioning device for welding and processing sheet metal parts in building engineering according to the present invention, the inner positioning mechanism includes a positioning plate, and there are two positioning plates. The two positioning plates are fixedly installed between each other by a spacing adjustment unit. A radial adjustment unit is installed inside each of the two positioning plates. The radial adjustment unit is radially displaced by the drive of the adjustment unit and the linkage unit.

[0013] As a preferred embodiment of the positioning device for welding sheet metal parts in building engineering according to the present invention, the radial adjustment unit includes an arc-shaped support plate, a sliding plate is fixedly connected to the inner side of the arc-shaped support plate, the sliding plate is slidably connected in a limiting groove opened in the side wall of the positioning disk, a pin is fixedly installed at the end of the sliding plate, a turntable is rotatably installed in the inner center of the positioning disk through a shaft, an arc-shaped guide groove is opened on the turntable, the pin is slidably connected in the arc-shaped guide groove, a toothed groove is opened around the side wall of the turntable, and the turntable is meshed with a drive gear through the toothed groove.

[0014] As a preferred embodiment of the positioning device for welding sheet metal parts in building engineering according to the present invention, the spacing adjustment unit includes a fixed cylinder and an adjusting column. The top surface of the fixed cylinder and extending into the interior are provided with a rectangular groove. The adjusting column is slidably connected in the rectangular groove. The side wall of the fixed cylinder is provided with a plurality of pin holes at equal intervals. The bottom side wall of the adjusting column is also provided with a pin hole. On the side wall of the fixed cylinder, one of the pin holes is connected to the pin hole on the bottom side wall of the adjusting column by a pin rod.

[0015] As a preferred embodiment of the positioning device for welding sheet metal parts in building engineering according to the present invention, the adjustment unit includes a second knob and a second transmission rod. The center of the side wall of the second knob is fixedly installed with one end of the second transmission rod. The second transmission rod is mounted on the side wall of the support seat through a bearing seat. A worm gear is fixedly installed at the other end of the second transmission rod. A worm wheel is meshed with the side wall of the worm gear. A rotating rod is keyed to the inside of the worm wheel. The top of the rotating rod is keyed to the drive gear below. The top of the rotating rod is keyed to the drive gear and is located on the positioning plate. The side wall of the drive gear is meshed with the linkage unit.

[0016] As a preferred embodiment of the positioning device for welding and processing sheet metal parts in building engineering according to the present invention, the linkage unit includes a driven gear and a transmission rod three. The bottom end of the transmission rod three is keyed to the driven gear. A spline groove is provided through the top surface of the transmission rod three. A spline shaft is slidably connected in the spline groove. The top end of the spline shaft is keyed to the lower gear plate. The top surface of the lower gear plate is meshed with the tooth groove on the bottom surface of the upper gear plate through a tooth groove. A drive shaft one is keyed to the inside of the upper gear plate. The drive shaft one is keyed to the inside of the drive gear. The lower and upper gear disks are both installed in the cover. A spring is sleeved on one side wall of the drive shaft located in the cover, and the spring applies a spring force to the top surface of the upper gear disk.

[0017] As a preferred embodiment of the positioning device for welding sheet metal parts in building engineering according to the present invention, the intermittent adjustment mechanism includes a lifting frame and an intermittent unit. The top of the lifting frame is fixedly installed on the lifting component of the welding device. The lifting frame is provided with a sliding unit inside. The end of the sliding unit is slidably connected to a rotating column. The inside of the rotating column is keyed to a second drive shaft. The bottom end of the second drive shaft is keyed to the intermittent unit.

[0018] The beneficial effects of this invention are: 1. This technical solution employs a dual positioning structure with an external positioning mechanism and an internal positioning mechanism working together. The external positioning mechanism clamps and fixes the pipe from the outside through multiple equally angled external clamping units. The internal positioning mechanism supports and positions the pipe from the inside through dual positioning discs and radial adjustment units. The load-bearing part and side positioning column of the external clamping unit work together with the arc-shaped support plate of the internal positioning mechanism to effectively resist welding impact, prevent axial sliding, radial displacement or tilting of the pipe, ensure alignment and no misalignment at the connection between the pipe and the pipe, thereby ensuring a smooth and continuous weld, significantly improving the quality of sealing welding, and preventing scratches on the pipe surface.

[0019] 2. This technical solution features multiple adjustable structures. The outer positioning mechanism, through the cooperation of knob one, toothed ring, and spiral chute, can drive the outer clamping unit to extend and retract radially, adapting to pipes of different diameters. The inner positioning mechanism, through the spacing adjustment unit, can flexibly adjust the distance between the two positioning discs, adapting to pipes of different lengths. Simultaneously, the radial adjustment unit can achieve extension and retraction adjustment through the cooperation of the adjustment unit and the linkage unit. Furthermore, through the structure of the lower toothed disc, upper toothed disc, and spring one, it can adapt to scenarios where pipes of different diameters are not the same. Without replacing the positioning components, it can meet the positioning needs of various specifications of tubular sheet metal parts, improving the adaptability and practicality of the device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an overall structural diagram of a positioning device used for welding sheet metal parts in building construction.

[0022] Figure 2 This is a structural diagram of a welding device for positioning and processing sheet metal parts in building engineering.

[0023] Figure 3 A structural diagram of a tubular sheet metal part used as a positioning device for welding sheet metal parts in building engineering.

[0024] Figure 4 This is a structural diagram of a positioning component for a positioning device used in the welding and processing of sheet metal parts in building engineering.

[0025] Figure 5 This is a structural diagram of the support mechanism and rotation mechanism of a positioning device used for welding sheet metal parts in building engineering.

[0026] Figure 6 This is a structural diagram of the external positioning mechanism for a positioning device used in the welding and processing of sheet metal parts in building engineering.

[0027] Figure 7 This is a bottom structural diagram of the external positioning mechanism of a positioning device used for welding sheet metal parts in building engineering.

[0028] Figure 8 This is a structural diagram of the external clamping unit of a positioning device for welding sheet metal parts in building engineering.

[0029] Figure 9 This is a structural diagram of the adjustment unit and linkage unit of a positioning device for welding sheet metal parts in building engineering.

[0030] Figure 10 This is a structural diagram of the internal positioning mechanism of a positioning device used for welding sheet metal parts in building construction.

[0031] Figure 11 This is a structural diagram of the spacing adjustment unit for a positioning device used in welding and processing sheet metal parts for building engineering.

[0032] Figure 12 This is a structural diagram of the linkage unit for a positioning device used in the welding and processing of sheet metal parts in building engineering.

[0033] Figure 13 This is a structural diagram of the intermittent adjustment mechanism for a positioning device used in the welding and processing of sheet metal parts in building engineering.

[0034] Figure 14 A cross-sectional view of a lifting frame used for positioning devices in the welding and processing of sheet metal parts in building construction.

[0035] Figure 15 This is a structural diagram of the sliding column 2 and rotating column of a positioning device for welding sheet metal parts in building engineering.

[0036] In the diagram: 1. Welding table; 2. Welding device; 21. Suspension; 22. Electric push rod; 23. Lifting plate; 24. Linear guide rail; 25. Electric slide table; 26. Mounting base; 27. Welding torch; 3. Positioning assembly; 31. Slewing bearing; 32. Rotation mechanism; 321. Gear disc; 322. Drive motor; 323. Gear 1; 33. Support mechanism; 331. Support cylinder; 332. Support base; 34. External positioning mechanism; 341. Fixing cover; 342. Slide groove; 343. Gear ring; 344 345. Gear II; 345. External clamping unit; 3451. Slide; 3452. Positioning seat; 3453. Bearing part; 3454. Side positioning post; 3455. Slide I; 346. Transmission rod I; 347. Knob I; 348. Spiral chute; 35. Internal positioning mechanism; 351. Positioning plate; 352. Radial adjustment unit; 3521. Arc-shaped support plate; 3522. Slide plate; 3523. Pin; 3524. Turntable; 3525. Arc-shaped guide groove; 3526. Drive gear; 353. 3531. Gap adjustment unit; 3532. Fixed cylinder; 3533. Adjusting column; 3534. Pin hole; 3535. Pin rod; 356. Knob II; 357. Transmission rod II; 358. Worm gear; 359. Rotating rod I; 350. Linkage unit; 3591. Driven gear; 3592. Transmission rod III; 3593. Splined shaft; 3594. Cover; 3595. Lower gear plate; 3596. Upper gear plate; 3597. Spring I; 3598. Drive shaft I; 3510. Active... 36. Gear; 36. Intermittent adjustment mechanism; 361. Lifting frame; 362. Sliding unit; 3621. Sliding column two; 3622. Vertical slider; 3623. Spring two; 3624. Inner groove; 3625. Spring three; 3626. Horizontal slider; 363. Rotating column; 3631. Axial spiral groove; 3632. Guide groove; 364. Intermittent unit; 365. Drive shaft two; 366. Vertical groove; 4. Tubular sheet metal part; 41. Pipe one; 42. Reinforcing rib; 43. Pipe two; 5. Protective cover. Detailed Implementation

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0040] Example 1, referring to Figures 1-12 This is the first embodiment of the present invention. This embodiment provides a positioning device for welding sheet metal parts in building engineering, including a welding table 1. A welding device 2 and a positioning component 3 are installed on the top surface of the welding table 1. The positioning component 3 is used to fix the sheet metal parts. The welding device 2 welds the sheet metal parts installed on the positioning component 3. During operation, the sheet metal parts to be welded are first accurately fixed by the positioning component 3 to ensure that the sheet metal parts do not shift or deviate during the welding process. After the positioning is completed, the welding device 2 is started, and the welding device 2 performs welding operations on the sheet metal parts fixed on the positioning component 3 to complete the welding processing of the sheet metal parts.

[0041] Specifically, the welding device 2 includes a suspension 21, an electric push rod 22 is mounted on the top of the suspension 21, linear guide rails 24 are mounted on the inner side walls of the bottom of the suspension 21, the top surface of the lifting plate 23 is fixedly mounted to the telescopic shaft of the electric push rod 22, and the two sides of the lifting plate 23 are fixedly mounted to the slides of the linear guide rails 24. The lifting plate 23 can move vertically up and down under the drive of the electric push rod 22. An electric slide table 25 is mounted on the bottom surface of the lifting plate 23, and a mounting base 26 is fixedly mounted on the nut slide of the electric slide table 25. A plasma arc welding gun 27 for welding sheet metal parts is fixedly mounted on the mounting base 26. The plasma arc welding gun 27 can approach the positioned sheet metal part below under the drive of the electric push rod 22, and can also adjust its lateral displacement through the electric slide table 25 to suit sheet metal parts of different diameters. The working principle of this part is all prior art, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0042] There are many types of sheet metal parts in construction engineering, such as... Figure 3As shown, a tubular sheet metal part 4 is provided. This tubular sheet metal part 4 is usually made by welding a pipe 41 with a larger diameter and a pipe 43 with a smaller diameter. The top surface of the pipe 41 is a semi-closed structure. In existing welding methods, a support claw device is often used to fix the pipe 41, and then the pipe 43 is placed on the top surface of the pipe 41 and spot welded to fix it. Then, a sealing weld is performed on the circumferential connection between the pipe 41 and the pipe 43. After welding, a reinforcing rib 42 is welded to the connection between the pipe 41 and the pipe 43 to ensure the support and stability between the pipe 41 and the pipe 43. Based on the above-mentioned prior art, the positioning device of the present invention mainly targets the circumferential welding of the pipe 41 and the pipe 43 and the welding of the reinforcing rib 42, which solves the shortcomings of the existing positioning method and optimizes the positioning effect.

[0043] The positioning component 3 includes an outer positioning mechanism 34 and an inner positioning mechanism 35. The inner positioning mechanism 35 is installed at the center of the top surface of the outer positioning mechanism 34, and the outer positioning mechanism 34 is installed on the support mechanism 33. The positioning component 3 adopts a dual positioning structure of outer positioning and inner positioning. The inner positioning mechanism 35 is fixedly installed at the center of the top surface of the outer positioning mechanism 34 to ensure the coaxiality of the inner positioning mechanism 35 and the outer positioning mechanism 34. The outer positioning mechanism 34 is fixedly installed on the support mechanism 33, which provides support and installation for the entire positioning component 3.

[0044] During operation, the outer positioning mechanism 34 clamps and fixes the pipe 41 from the outside, while the inner positioning mechanism 35 supports and positions the pipe 41 from the inside. The two work together to achieve all-round positioning of the pipe 41, preventing displacement or tilting of the pipe 41 during welding. At the same time, they provide a reference for the placement and positioning of the second pipe 43, ensuring the coaxiality of the pipe 41 and the second pipe 43, and laying the foundation for subsequent circumferential welding and reinforcing rib welding.

[0045] Specifically, the support mechanism 33 includes a support cylinder 331, a support seat 332 fixedly mounted on the top surface of the support cylinder 331, an external positioning mechanism 34 mounted on the top surface of the support seat 332, and the bottom surface of the support cylinder 331 rotatably mounted on the welding table 1 via a rotary bearing 31. The side walls of the support cylinder 331 are respectively fixedly mounted with a rotation mechanism 32 and an intermittent adjustment mechanism 36. The support mechanism 33 uses the support cylinder 331 as the core load-bearing component. The support seat 332 is fixedly mounted on the top surface of the support cylinder 331 and the support seat 332 to support the external positioning mechanism 34 and provide a stable installation position for the external positioning mechanism 34. The bottom surface of the support cylinder 331 is rotatably connected to the welding table 1 via a rotary bearing 31. The rotary bearing 31 allows the support cylinder 331 to rotate flexibly around its own axis on the welding table 1 and remain stable during rotation to avoid jamming.

[0046] The side walls of the support cylinder 331 are respectively fixedly installed with a rotation mechanism 32 and an intermittent adjustment mechanism 36. The rotation mechanism 32, which will be described in detail in Embodiment 2, provides power for the continuous rotation of the support cylinder 331, driving the support base 332, the outer positioning mechanism 34, the inner positioning mechanism 35 and the positioned tubular sheet metal part 4 to rotate synchronously and continuously, adapting to the circumferential welding requirements. The intermittent adjustment mechanism 36, which will be described in detail in Embodiment 3, provides power for the intermittent rotation of the support cylinder 331, realizing the intermittent pause of the support cylinder 331, adapting to the welding requirements of the reinforcing rib 42.

[0047] The external positioning mechanism 34 includes a fixed cover 341 and a gear ring 343. The bottom surface of the gear ring 343 is slidably connected in an annular groove on the support base 332 via a sliding pin, ensuring that the gear ring 343 can rotate flexibly around its own axis on the support base 332 without deviation during rotation. The side wall of the gear ring 343 is meshed with multiple gears 344. The multiple gears 344 are rotatably connected in the fixed cover 341 via a rotating shaft, allowing them to rotate around their own rotating shaft. One of the gears 344 has a transmission rod 346 keyed to its bottom surface. A knob 347 is fixedly installed at the bottom end of the transmission rod 346. The knob 347 is mounted on the bottom surface of the support base 332 via a bearing seat. When the knob 347 rotates, it can drive the transmission rod 346 to rotate synchronously. The top surface of the gear ring 343 has a spiral groove 348, in which an external clamping unit 345 is slidably connected.

[0048] During operation, the pipe 41 to be positioned is placed between the outer clamping units 345 and outside the inner positioning mechanism 35. The knob 347 is manually rotated, which drives the transmission rod 346 to rotate. The transmission rod 346 drives the gear 344 connected to it to rotate. The gear 344 drives the toothed ring 343 to rotate around its own axis. When the toothed ring 343 rotates, the spiral groove 348 on its top surface generates a circumferential driving force, which drives the outer clamping unit 345 slidably connected to it to move along the trajectory of the spiral groove 348, thereby realizing the radial extension and retraction of the outer clamping unit 345, that is, moving closer to or away from the center of the toothed ring 343. The arrangement of multiple gears 344 can ensure that the toothed ring 343 is evenly stressed and rotates smoothly, avoiding tilting or jamming of the toothed ring 343. Thus, the radial extension and retraction of the outer clamping unit 345 can be realized, thereby adapting to pipes 41 of different diameters.

[0049] Specifically, the outer clamping unit 345 includes a slide block 3451, with a sliding column 3455 fixedly connected to the bottom surface of the slide block 3451. The sliding column 3455 is slidably connected in the spiral groove 348 to form a sliding fit. The top surface of the fixed cover 341 has a groove 342 at equal angles around the center. The slide block 3451 is slidably connected in the groove 342, which guides and limits the movement of the slide block 3451, ensuring that the slide block 3451 can only move radially. A positioning seat 3452 is fixedly installed on the top surface of the slide block 3451. A bearing part 3453 is integrally formed on the inner bottom of the positioning seat 3452. A rubber pad is adhered to the bearing part 3453. A side positioning post 3454 is fixedly installed on the inner wall of the positioning seat 3452.

[0050] During operation, when the gear ring 343 rotates and the spiral chute 348 drives the sliding column 3455 to move, the sliding column 3455 drives the sliding seat 3451 to move radially along the sliding groove 342 of the fixed cover 341. The sliding seat 3451 drives the positioning seat 3452 to move radially synchronously. When multiple external clamping units 345 approach the center simultaneously, the inner side wall of the positioning seat 3452 fits against the outer side wall of the pipe 41, and the side positioning column 3454 abuts against the corresponding position of the side wall of the pipe 41, realizing the side positioning of the pipe 41. The bearing part 3453 supports the bottom of the pipe 41, realizing the axial bearing of the pipe 41. The rubber pad increases the friction between the bearing part 3453 and the pipe 41, preventing the pipe 41 from sliding during the welding process, and at the same time avoiding the rubber pad from scratching the surface of the pipe 41. The multiple external clamping units 345 are distributed at equal angles to ensure that the pipe 41 is subjected to uniform force and accurate positioning, and to prevent the pipe 41 from tilting.

[0051] The internal positioning mechanism 35 includes two positioning discs 351, which adopt a double positioning disc 351 structure. The two positioning discs 351 are fixedly installed between each other through a spacing adjustment unit 353, which can adapt to pipes 41 and 43 of different lengths. Each of the two positioning discs 351 is equipped with a radial adjustment unit 352 to achieve support and positioning of the inside of pipe 41. The radial adjustment unit 352 is driven by an adjustment unit and a linkage unit 359 to move radially. The adjustment unit provides power, and the linkage unit 359 realizes power transmission, ensuring that the radial adjustment units 352 inside the two positioning discs 351 move synchronously to achieve uniform support for the inside of pipes 41 and 43.

[0052] During operation, the distance between the two positioning discs 351 is first adjusted by the distance adjustment unit 353 to match the lengths of pipe 1 41 and pipe 2 43. Then, the adjustment unit is activated, and the power generated by the adjustment unit is transmitted to the radial adjustment unit 352 inside the two positioning discs 351 through the linkage unit 359. This causes the radial adjustment unit 352 to extend radially outward until it is tightly fitted with the inner sidewalls of pipe 1 41 and pipe 2 43, thus achieving internal support positioning of pipe 1 41 and pipe 2 43. This, together with the external clamping positioning of the external positioning mechanism 34, constitutes a dual positioning system.

[0053] As an optimized technical solution of this embodiment, the spacing adjustment unit 353 includes a fixed cylinder 3531 and an adjusting column 3532. The top surface of the fixed cylinder 3531 and extending into the interior are provided with a rectangular groove. The adjusting column 3532 is slidably connected in the rectangular groove. The side wall of the fixed cylinder 3531 is provided with a plurality of pin holes 3533 at equal intervals. The bottom side wall of the adjusting column 3532 is also provided with a pin hole 3533. On the side wall of the fixed cylinder 3531, one of the pin holes 3533 is connected to the pin hole 3533 on the bottom side wall of the adjusting column 3532 by a pin rod 3534.

[0054] When it is necessary to adjust the distance between the two positioning discs 351 to accommodate pipes 41 of different lengths, first pull out the pin 3534 to release the fixation between the fixed cylinder 3531 and the adjusting column 3532. Then, push the adjusting column 3532 to move up and down along the rectangular groove of the fixed cylinder 3531 until the distance between the two positioning discs 351 is adapted to the lengths of pipes 41 and 43. At this time, a pin hole 3533 on the side wall of the fixed cylinder 3531 is aligned with the pin hole 3533 at the bottom of the adjusting column 3532. Then, insert the pin 3534 into the aligned pin hole 3533 to fix the fixed cylinder 3531 and the adjusting column 3532, thereby fixing the distance between the two positioning discs 351. The equal spacing of multiple pin holes 3533 can realize multi-level adjustment of the distance between the two positioning discs 351, improving adaptability.

[0055] Specifically, the radial adjustment unit 352 includes an arc-shaped support plate 3521. A slide plate 3522 is fixedly connected to the inner side of the arc-shaped support plate 3521. The slide plate 3522 is slidably connected in a limiting groove opened on the side wall of the positioning plate 351, forming a sliding fit. The limiting groove guides and limits the movement of the slide plate 3522, ensuring that the slide plate 3522 can only move radially along the positioning plate 351, and preventing the slide plate 3522 from deviating. A pin 3523 is fixedly installed at the end of the slide plate 3522. A turntable 3524 is rotatably installed in the inner center of the positioning plate 351 through a shaft. An arc-shaped guide groove 3525 is opened on the turntable 3524. The pin 3523 is slidably connected in the arc-shaped guide groove 3525. A toothed groove is opened around the side wall of the turntable 3524. The turntable 3524 is meshed with the drive gear 3526 through the toothed groove.

[0056] During operation, the drive gear 3526 rotates, causing the turntable 3524 meshing with it to rotate around the central axis of the positioning disk 351. When the turntable 3524 rotates, the arc-shaped guide groove 3525 on its surface generates a circumferential driving force, causing the pin 3523 slidably connected to it to move along the trajectory of the arc-shaped guide groove 3525. The pin 3523 causes the slide plate 3522 fixedly connected to it to move radially along the limiting groove of the positioning disk 351. The slide plate 3522 causes the arc-shaped support plate 3521 to move radially synchronously, realizing the extension or retraction of the arc-shaped support plate 3521, ensuring uniform support for the inside of pipe 41 or pipe 43. The arc-shaped structure of the arc-shaped support plate 3521 has a high degree of fit with the inner wall of pipe 41 to prevent the position of pipe 41 and pipe 43 from shifting.

[0057] The two radial adjustment units 352 are driven in the following manner: the adjustment unit includes a second knob 354 and a second transmission rod 355. The center of the side wall of the second knob 354 is fixedly installed with one end of the second transmission rod 355. The second transmission rod 355 is mounted on the side wall of the support base 332 through a bearing seat. The other end of the second transmission rod 355 is fixedly installed with a worm gear 356. The side wall of the worm gear 356 is meshed with a worm wheel 357, forming a worm gear transmission pair. With a self-locking function, the worm wheel 357 can be prevented from rotating in the opposite direction, ensuring stable positioning. The inside of the worm wheel 357 is keyed to a first rotating rod 358. The top of the first rotating rod 358 is keyed to the drive gear 3526 below. The top of the first rotating rod 358 is keyed to the drive gear 3510 and is located on the positioning plate 351. The side wall of the drive gear 3510 is meshed with the linkage unit 359.

[0058] During operation, the knob 2 354 is manually rotated, which drives the transmission rod 2 355 to rotate around its own axis. The transmission rod 2 355 drives the worm gear 356 fixedly connected to it to rotate. The worm gear 356 drives the worm wheel 357 meshing with it to rotate. The worm wheel 357 drives the rotating rod 1 358 connected to it to rotate synchronously. The rotating rod 1 358 simultaneously drives the lower drive gear 3526 and the upper drive gear 3510 to rotate. When the lower drive gear 3526 rotates, it directly drives the radial adjustment unit 352 inside the lower positioning disk 351 to move. When the drive gear 3510 rotates, it transmits power to the drive gear 3526 inside the upper positioning disk 351 through the linkage unit 359, which drives the radial adjustment unit 352 inside the upper positioning disk 351 to move synchronously. Finally, the radial adjustment units 352 inside the two positioning disks 351 are extended and retracted, completing the internal support positioning of pipe 1 41 and pipe 2 43.

[0059] The linkage unit 359 includes a driven gear 3591 and a transmission rod 3592. The bottom end of the transmission rod 3592 is keyed to the driven gear 3591. A spline groove is formed through the top surface of the transmission rod 3592. A spline shaft 3593 is slidably connected in the spline groove, which can realize axial sliding and transmit circumferential power. The top end of the spline shaft 3593 is keyed to the lower gear 3595. The top surface of the lower gear 3595 is meshed with the tooth groove on the bottom surface of the upper gear 3596 through a tooth groove. The upper gear 3596 is keyed to the inside of a drive shaft 3598. The drive shaft 3598 is keyed to the inside of a drive gear 3526.

[0060] During operation, the driving gear 3510 rotates, causing the driven gear 3591, which meshes with it, to rotate synchronously. The driven gear 3591 then drives the transmission rod 3592, which is keyed to it, to rotate. Since the transmission rod 3592 and the splined shaft 3593 are splined, the rotational power of the transmission rod 3592 is synchronously transmitted to the splined shaft 3593, causing the splined shaft 3593 to rotate. The splined shaft 3593 then drives the lower gear 3595, which is keyed to the top, to rotate. The lower gear 3595 then drives the upper gear 3596, which meshes with it, to rotate. 3596 drives the drive shaft 3598 connected to it to rotate. The drive shaft 3598 then drives the drive gear 3526 inside the upper positioning disk 351 to rotate, which in turn drives the radial adjustment unit 352 of the upper positioning disk 351 to move, realizing the extension and retraction of the arc-shaped support plate 3521. At the same time, when the distance between the two positioning disks 351 is adjusted by the distance adjustment unit 353, the spline shaft 3593 can slide axially along the spline groove of the transmission rod 3592 to adapt to the change in the distance between the two positioning disks 351 and ensure that the power transmission is uninterrupted.

[0061] Both the lower gear disk 3595 and the upper gear disk 3596 are installed in the cover 3594. A spring 3597 is sleeved on the side wall of the drive shaft 3598 located in the cover 3594. The spring 3597 applies a spring force to the top surface of the upper gear disk 3596. Since the pipe diameters of pipe 41 and pipe 43 may be different, when the diameter of pipe 41 is larger than the diameter of pipe 43, the extension and retraction stroke of the upper arc-shaped support plate 3521 is less than that of the lower arc-shaped support plate 3521. The telescopic stroke allows the lower gear plate 3595 and the upper gear plate 3596 to slide out of alignment after the upper arc-shaped support plate 3521 abuts against the inner wall of the second pipe 43. The spring 3597 is repeatedly compressed and expanded, thereby interrupting the power transmission between the spline shaft 3593 and the drive shaft 3598. At this time, the lower arc-shaped support plate 3521 then expands to abut against the inner side of the first pipe 41, thereby achieving the positioning for welding two pipes of different diameters.

[0062] Example 2, refer to Figures 4-5This is the second embodiment of the present invention, based on the previous embodiment. A rotating mechanism 32 is fixedly installed on the side wall of the support mechanism 33. A protective cover 5 covers the support mechanism 33 and the rotating mechanism 32, providing protection for the rotating mechanism 32 and the intermittent adjustment mechanism 36 in embodiment 3. The rotating mechanism 32 drives the support mechanism 33, the outer positioning mechanism 34, and the inner positioning mechanism 35 to rotate along the axis, allowing the plasma arc welding torch 27 to perform a full-circle welding treatment on the connection between pipe one 41 and pipe two 43. The bottom surface of the support mechanism 33 is rotatably mounted on the welding table 1 via a rotary bearing 31. The rotating mechanism 32 includes a gear disk 321, a drive motor 322, and a gear 323. The gear disk 321 is mounted on the side wall of the support cylinder 331 to ensure that the gear disk 321 is coaxial with the support cylinder 331 and rotates synchronously with the support cylinder 331. The side wall of the gear disk 321 is meshed with the gear 323. The drive motor 322 is connected to the internal key of the gear 323 through a shaft. The drive motor 322 is fixedly mounted on the bottom surface of the welding table 1. The drive motor 322 serves as a power source and is connected to the internal key of the gear 323 through a shaft to ensure that when the output shaft of the drive motor 322 rotates, it can drive the gear 323 to rotate synchronously.

[0063] First, following the operation procedure of Example 1, the outer positioning mechanism 34 and the inner positioning mechanism 35 work together to complete the external clamping and internal support positioning of pipe 1 41. Then, pipe 2 43 is placed on the top surface of pipe 1 41, and the inner positioning mechanism 35 is used to internally support and position pipe 2 43. The position of the plasma arc welding gun 27 of the welding device 2 is adjusted. The lifting is adjusted by the electric push rod 22 and the lateral displacement is adjusted by the electric slide table 25 so that the plasma arc welding gun 27 is aligned with the connection between pipe 1 41 and pipe 2 43. Then, the drive motor 322 of the self-rotation mechanism 32 is started. The output shaft of the drive motor 322 drives the gear 1 323 connected to it to rotate. The gear 1 323 drives the gear disk 321 meshing with it to rotate. The gear disk 321 drives the support cylinder 331 fixedly connected to it to rotate.

[0064] Since the bottom surface of the support cylinder 331 is rotatably connected to the welding table 1 through the slewing bearing 31, when the support cylinder 331 rotates, it synchronously drives the support seat 332 fixed on the top surface, the outer positioning mechanism 34 on the support seat 332, the inner positioning mechanism 35 on the top surface of the outer positioning mechanism 34, and the pipe 41 and pipe 43 fixed by the outer positioning mechanism 34 and the inner positioning mechanism 35 to rotate synchronously and continuously along the same axis. At this time, the position of the plasma arc welding gun 27 is kept fixed, and the rotating tubular sheet metal part 4 allows each position of the joint to pass through the welding end of the plasma arc welding gun 27 in sequence. The plasma arc welding gun 27 works continuously, and a continuous sealing weld of one circle at the joint of pipe 41 and pipe 43 can be completed without manual intervention in the rotation, and the joint of pipe 41 and pipe 43 can be welded.

[0065] In addition, the drive motor 322 can be a speed-regulating motor, which can flexibly adjust the speed according to the welding process requirements to adapt to the welding needs of tubular sheet metal parts 4 with different diameters and thicknesses, and ensure welding quality. For example, the speed of tubular sheet metal parts 4 with larger diameters can be appropriately reduced to ensure full welds.

[0066] Example 3, referring to Figures 13-15 This is the third embodiment of the present invention. Based on the first two embodiments, the side wall of the support mechanism 33 is also fixedly installed with an intermittent adjustment mechanism 36. The driving source of the intermittent adjustment mechanism 36 is realized by the telescopic movement of the electric push rod 22. When it is necessary to weld the reinforcing rib 42 at the connection between pipe 1 41 and pipe 2 43, the welded pipe 1 41 and pipe 2 43 are first removed from the positioning component 3 as a whole. Multiple reinforcing ribs 42 are pre-spot welded and fixed along a circle of the connection. Then, the positioning component 3 is used again to position the pipe 1 41 and pipe 2 43 with reinforcing ribs 42.

[0067] The intermittent adjustment mechanism 36 includes a lifting frame 361 and an intermittent unit 364. The top of the lifting frame 361 is fixedly installed on the lifting component of the welding device 2, namely the lifting plate 23. The lifting frame 361 is provided with a sliding unit 362. The end of the sliding unit 362 is slidably connected to a rotating column 363. The rotating column 363 is keyed to a second drive shaft 365. The bottom end of the second drive shaft 365 is keyed to the intermittent unit 364.

[0068] The reinforcing ribs 42 need to be welded at intervals and fixed points at the joints. The positioning components 3 and sheet metal parts need to be intermittently stopped, rather than rotating continuously as in Example 2. The top of the lifting frame 361 is directly fixed on the lifting plate 23 of the welding device 2. The lifting movement of the lifting plate 23 is driven by the electric push rod 22. Therefore, when the electric push rod 22 is started and performs a telescopic action, it will simultaneously drive the lifting plate 23 to perform vertical lifting. The lifting plate 23 will then drive the lifting frame 361 fixed on the top surface to perform vertical lifting movement simultaneously. The lifting movement will directly drive the internal sliding unit 362 to move, completing the initial power transmission.

[0069] The sliding unit 362 includes a second sliding column 3621 and a vertical slider 3622. A vertical groove 366 is formed on the outer wall of the lifting frame 361. The second sliding column 3621 is slidably connected in the vertical groove 366. The second sliding column 3621 is slidably installed inside the vertical slider 3622, and a transverse groove is formed inside the vertical slider 3622. A horizontal slider 3626 is slidably connected in the transverse groove. A hole is formed inside the horizontal slider 3626, and the tail of the second sliding column 3621 is inserted into the hole. In the cavity between the horizontal groove and the horizontal slider 3626, a spring 3623 is installed by compression. The bottom of the lifting frame 361 has an inner groove 3624. The vertical slider 3622 is slidably connected in the inner groove 3624. A spring 3625 is installed in the travel cavity between the vertical slider 3622 and the inner groove 3624. The purpose of adding the spring 3625 is to adapt the travel of the lifting frame 361 to the axial spiral groove 3631 and guide groove 3632 of the rotating column 363.

[0070] The outer wall of the lifting frame 361 is provided with a vertical groove 366. The second sliding column 3621 is embedded in the vertical groove 366 and slidably connected thereto. The vertical groove 366 guides the movement of the second sliding column 3621. The rotating column 363 is provided with an axial spiral groove 3631 around the side wall. The openings of the axial spiral groove 3631 at both ends are connected to the guide groove 3632, and the guide groove 3632 is perpendicular to the side wall of the rotating column 363. The end of the second sliding column 3621 slides in the axial spiral groove 3631 and the guide groove 3632 under the lifting movement of the lifting frame 361.

[0071] When the sliding column 3621 slides in the axial spiral groove 3631, it will be subjected to a lateral reaction force from the side wall of the axial spiral groove 3631. During the lifting and lowering process, the sliding column 3621 can slide along the axial spiral groove 3631 and drive the rotating column 363 to rotate. When the sliding column 3621 slides to the beginning and end of the axial spiral groove 3631, it realizes one revolution of the rotating column 363, thereby causing the rotating column 363 to drive the intermittent unit 364 to rotate intermittently, which in turn drives the external positioning mechanism 34 and The internal positioning mechanism 35 fixes pipe one 41 and pipe two 43 to rotate intermittently. It should be noted that the rotation angle of the rotating column 363 is determined by the spiral stroke of the axial spiral groove 3631. When the sliding column two 3621 slides from one end of the axial spiral groove 3631 to the other end, the rotating column 363 rotates exactly by a preset angle. This angle can be designed according to the welding spacing of the reinforcing rib 42 to ensure that the joint of the sheet metal part is aligned with the plasma arc welding gun 27 with each rotation, which facilitates the welding process of the reinforcing rib 42.

[0072] When the second sliding column 3621 slides down to the end of the axial spiral groove 3631, it will enter the guide groove 3632 that is connected to the axial spiral groove 3631. At this time, the second sliding column 3621 continues to slide down with the lifting frame 361. Since the guide groove 3632 is perpendicular to the side wall of the rotating column 363, when the second sliding column 3621 slides down along the guide groove 3632, it will only generate axial extrusion force on the rotating column 363 and will not generate circumferential driving force. Therefore, the rotating column 363 stops rotating and enters a stationary state.

[0073] At this time, the plasma arc welding gun 27 welds the reinforcing rib 42. When the second sliding column 3621 slides to the end of the guide groove 3632, the electric push rod 22 begins to retract, driving the lifting plate 23 and the lifting frame 361 to move upward. During the process of the second sliding column 3621 sliding upward along the guide groove 3632, a protrusion is provided at the connection between the end of the guide groove 3632 and the axial spiral groove 3631. At the same time, the elastic force of the second spring 3623 ensures that the second sliding column 3621 slides into the axial spiral groove 3631. The sliding along the axial spiral groove 3631 allows the rotating column 363 to continue to rotate. Then the second sliding column 3621 slides to the top of the axial spiral groove 3631 and enters the guide groove 3632 on the other side, and the rotating column 363 stops again.

[0074] Thus, as the electric push rod 22 continues to extend and retract, the sliding column 3621 slides repeatedly in the axial spiral groove 3631 and guide groove 3632, driving the rotating column 363 to achieve intermittent cyclic rotation of rotation-pause-re-rotation-re-pause, adapting to the interval welding requirements of the reinforcing rib 42, repeating the cycle until all reinforcing ribs 42 are welded.

[0075] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A positioning device for welding sheet metal parts in building engineering, characterized in that: The assembly includes a welding table (1), on the top surface of which a welding device (2) and a positioning component (3) are installed. The positioning component (3) is used to fix sheet metal parts, and the welding device (2) welds the sheet metal parts installed on the positioning component (3). The positioning component (3) includes an outer positioning mechanism (34) and an inner positioning mechanism (35). The inner positioning mechanism (35) is installed at the center of the top surface of the outer positioning mechanism (34). The outer positioning mechanism (34) is installed on the support mechanism (33). The side wall of the support mechanism (33) is fixedly installed with a rotation mechanism (32) and an intermittent adjustment mechanism (36). The bottom surface of the support mechanism (33) is rotated on the welding table (1) through a rotary bearing (31).

2. The positioning device for welding sheet metal parts in building engineering as described in claim 1, characterized in that: The support mechanism (33) includes a support cylinder (331), a support seat (332) is fixedly installed on the top surface of the support cylinder (331), the external positioning mechanism (34) is installed on the top surface of the support seat (332), the bottom surface of the support cylinder (331) is rotatably installed on the welding table (1) through a rotary bearing (31), and the side walls of the support cylinder (331) are respectively fixedly installed with a rotation mechanism (32) and an intermittent adjustment mechanism (36).

3. The positioning device for welding sheet metal parts in building engineering as described in claim 2, characterized in that: The external positioning mechanism (34) includes a fixed cover (341) and a gear ring (343). The bottom surface of the gear ring (343) is slidably connected in an annular groove on the support base (332) by a sliding pin. The side wall of the gear ring (343) is meshed with multiple gears (344). The multiple gears (344) are rotatably connected in the fixed cover (341) by a rotating shaft. One of the gears (344) is keyed to the bottom surface of a transmission rod (346). A knob (347) is fixedly installed at the bottom end of the transmission rod (346). A spiral groove (348) is opened on the top surface of the gear ring (343). An external clamping unit (345) is slidably connected in the spiral groove (348).

4. The positioning device for welding sheet metal parts in building engineering as described in claim 3, characterized in that: The outer clamping unit (345) includes a slide (3451), and a sliding column (3455) is fixedly connected to the bottom surface of the slide (3451). The sliding column (3455) is slidably connected in the spiral chute (348). The top surface of the fixed cover (341) is provided with a sliding groove (342) at equal angles around the center. The slide (3451) is slidably connected in the sliding groove (342). A positioning seat (3452) is fixedly installed on the top surface of the slide (3451). A bearing part (3453) is integrally formed on the bottom inner side of the positioning seat (3452). A rubber pad is adhered to the bearing part (3453). A side positioning column (3454) is fixedly installed on the inner side wall of the positioning seat (3452).

5. The positioning device for welding sheet metal parts in building engineering as described in claim 2, characterized in that: The internal positioning mechanism (35) includes a positioning disk (351), and there are two positioning disks (351). The two positioning disks (351) are fixedly installed between each other by a spacing adjustment unit (353). A radial adjustment unit (352) is installed inside each of the two positioning disks (351). The radial adjustment unit (352) is radially displaced by the drive of the adjustment unit and the linkage unit (359).

6. The positioning device for welding sheet metal parts in building engineering as described in claim 5, characterized in that: The radial adjustment unit (352) includes an arc-shaped support plate (3521), and a sliding plate (3522) is fixedly connected to the inner side of the arc-shaped support plate (3521). The sliding plate (3522) is slidably connected in a limiting groove opened on the side wall of the positioning plate (351). A pin (3523) is fixedly installed at the end of the sliding plate (3522). A turntable (3524) is rotatably installed in the inner center of the positioning plate (351) through a shaft. An arc-shaped guide groove (3525) is opened on the turntable (3524). The pin (3523) is slidably connected in the arc-shaped guide groove (3525). A toothed groove is opened around the side wall of the turntable (3524). The turntable (3524) is meshed with a drive gear (3526) through the toothed groove.

7. The positioning device for welding sheet metal parts in building engineering as described in claim 6, characterized in that: The spacing adjustment unit (353) includes a fixed cylinder (3531) and an adjusting column (3532). The top surface of the fixed cylinder (3531) and extending into the interior are provided with a rectangular groove. The adjusting column (3532) is slidably connected in the rectangular groove. The side wall of the fixed cylinder (3531) is provided with a plurality of pin holes (3533) at equal intervals. The bottom side wall of the adjusting column (3532) is also provided with a pin hole (3533). On the side wall of the fixed cylinder (3531), one of the pin holes (3533) is connected to the pin hole (3533) on the bottom side wall of the adjusting column (3532) by a pin rod (3534).

8. The positioning device for welding sheet metal parts in building engineering as described in claim 7, characterized in that: The adjustment unit includes a second knob (354) and a second transmission rod (355). The center of the side wall of the second knob (354) is fixedly installed with one end of the second transmission rod (355). The second transmission rod (355) is mounted on the side wall of the support base (332) through a bearing seat. The other end of the second transmission rod (355) is fixedly installed with a worm gear (356). The side wall of the worm gear (356) is meshed with a worm wheel (357). The inside of the worm wheel (357) is keyed with a rotating rod (358). The top of the rotating rod (358) is keyed to the drive gear (3526) below. The top of the rotating rod (358) is keyed to the drive gear (3510) and is located on the positioning plate (351). The side wall of the drive gear (3510) is meshed with the linkage unit (359).

9. The positioning device for welding sheet metal parts in building engineering as described in claim 7, characterized in that: The linkage unit (359) includes a driven gear (3591) and a transmission rod three (3592). The bottom end of the transmission rod three (3592) is keyed to the driven gear (3591). A spline groove is provided through the top surface of the transmission rod three (3592). A spline shaft (3593) is slidably connected in the spline groove. The top end of the spline shaft (3593) is keyed to the lower gear disk (3595). The top surface of the lower gear disk (3595) is meshed with the tooth groove on the bottom surface of the upper gear disk (3596) through a tooth groove. A drive shaft one (3598) is keyed to the inside of the upper gear disk (3596). The drive shaft one (3598) is keyed to the inside of the drive gear (3526). The lower gear disk (3595) and the upper gear disk (3596) are both installed in the cover (3594). The drive shaft (3598) located in the cover (3594) is fitted with a spring (3597) on its side wall. The spring (3597) applies a spring force to the top surface of the upper gear disk (3596).

10. The positioning device for welding sheet metal parts in building engineering as described in claim 2, characterized in that: The intermittent adjustment mechanism (36) includes a lifting frame (361) and an intermittent unit (364). The top of the lifting frame (361) is fixedly installed on the lifting component of the welding device (2). The lifting frame (361) is provided with a sliding unit (362) inside. The end of the sliding unit (362) is slidably connected to a rotating column (363). The rotating column (363) is keyed to a second drive shaft (365). The bottom end of the second drive shaft (365) is keyed to the intermittent unit (364).

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