Assembly type steel structure component welding device

Abstract

The invention relates to the technical field of assembly type steel structure machining, in particular to an assembly type steel structure component welding device which comprises a base, a conveying roller way is installed in the middle of the upper end of the base, two welding units which are symmetrically arranged front and back are installed at the upper end of the base, and a cooling unit is connected between the welding units and the base. The mode that the two sides of the web are welded in a segmented and staggered mode is adopted, the problem of instantaneous heat concentration caused by simultaneous welding of the two sides is effectively avoided, meanwhile, the temperature of a welding area can be monitored in real time, and when it is detected that the temperature exceeds a set threshold value, a welding gun is automatically controlled to stop working and rapidly withdraw from the welding area; then the welding area is rapidly cooled, so that the risk that the thin web is deformed and even burnt through due to local overheating is greatly reduced, and the welding quality and the bearing capacity of the H-shaped steel are effectively ensured; meanwhile, extra waiting for cooling is not needed, and the overall welding operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of prefabricated steel structure processing technology, specifically a welding device for prefabricated steel structure components. Background Technology

[0002] Prefabricated steel structures, as one of the main structural forms of modern buildings, have the characteristics of high construction efficiency, energy saving and environmental protection. Among them, H-beams are widely used due to their reasonable cross-sectional shape and superior mechanical properties. H-beams are usually made by welding the web in the middle with the flanges on the upper and lower sides. In order to ensure that the overall stress of the component is uniform and to control welding deformation, traditional processes often adopt the method of symmetrical welding on both sides of the web. If only one side is welded, it may lead to stress imbalance, causing serious deformation such as bending and twisting of the component, which will affect subsequent installation and use.

[0003] In the current H-beam welding process, the web and flange plates must first be precisely positioned and clamped by assembly equipment to ensure a tight fit. Then, welding is performed simultaneously on both sides of the web using double welding guns, with common processes such as submerged arc welding, to achieve high efficiency and symmetrical heat input. After welding, the H-beam undergoes special straightening treatment to correct residual deformation generated during welding and ensure the dimensional accuracy of the H-beam.

[0004] The following problems exist in the welding of H-beams: Although symmetrical welding on both sides is beneficial to control overall deformation, the simultaneous operation of welding torches on both sides during welding leads to excessive heat input and instantaneous temperature rise in the web welding area. Especially when the web thickness is thin, simultaneous welding on both sides will cause heat to accumulate rapidly in local areas of the web, which can easily cause overheating and deformation of the web. In severe cases, local overheating can even lead to burn-through of the web, affecting the quality and load-bearing capacity of the H-beam. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a prefabricated steel structure component welding device, comprising a base, a conveyor roller conveyor installed at the middle of the upper end of the base, and two welding units symmetrically arranged front and back installed on the upper end of the base. A cooling unit connects the welding units and the base. Two symmetrically arranged sliding grooves are formed on the upper end of the base. Each welding unit includes a sliding seat slidably mounted in the sliding groove via an electric push rod. A connecting seat is mounted on the upper end of the sliding seat via multiple telescopic rods, and a welding torch is mounted on the upper end of the connecting seat via a reciprocating assembly. The two welding torches are arranged alternately left and right. During welding... The reciprocating assembly drives two welding torches to weld alternately on both sides of the web plate. A temperature sensor is installed on the reciprocating assembly, and a lifting assembly is installed at the lower end of the connecting seat. The cooling unit includes a top plate that is slidably mounted on the upper end of the base via the connecting assembly. Two water-cooled plates arranged left and right are installed at the lower end of the top plate via a synchronization assembly. The synchronization assembly drives the water-cooled plates to move synchronously with the corresponding welding torches. When the temperature sensor detects that the temperature at the welding point is too high, the sliding seat drives the welding torch away from the welding area, and the lifting assembly drives the welding torch upward, so that the welding torch quickly moves away from the welding point of the web plate. At the same time, the connecting assembly drives the water-cooled plates to fit tightly against the front and rear sides of the web plate to quickly cool the welding point.

[0006] Preferably, the reciprocating assembly includes a slide block that is slidably mounted on a connecting seat, a threaded rod connecting the slide block and the connecting seat, the threaded rod being fixedly connected to the output shaft of a servo motor fixedly mounted on the right end of the connecting seat, a welding torch being mounted on the slide block, and a temperature sensor being fixedly mounted on the side of the slide block near the middle of the base.

[0007] Preferably, the lifting assembly includes a lifting rod fixedly installed at the lower end of the connecting seat by multiple connecting rods, and two symmetrically arranged mating plates are installed at the upper end of the base corresponding to the position of the lifting rod. The mating plates are provided with mating grooves, and the left and right ends of the lifting rod are slidably installed in the corresponding mating grooves.

[0008] Preferably, the mating groove consists of three sections, with the front and rear sections being horizontal sections, and the two horizontal sections being connected by an inclined section, with the end of the inclined section away from the center of the base tilting upwards.

[0009] Preferably, the connecting assembly includes two symmetrically arranged round rods fixedly installed at the lower end of the top plate. A connecting block is fixedly installed at the lower end of the round rods, and the connecting block and the base are slidably connected. A driven rack is fixedly installed at the end of the connecting block away from the middle of the base. Two symmetrically arranged driving racks are fixedly installed at the end of the sliding seat away from the middle of the base. A gear meshes between the driving rack and the corresponding driven rack, and the gear is connected to a rotating shaft rotatably installed at the upper end of the base.

[0010] Preferably, the synchronization group includes two symmetrically arranged synchronization plates that are slidably mounted on the lower end of the top plate. A bidirectional screw is installed between the two synchronization plates and the top plate, and the bidirectional screw is fixedly connected to the output shaft of the second servo motor fixedly mounted on the right end of the top plate. The lower end of the synchronization plate is connected to the corresponding water-cooled plate through a transmission group.

[0011] Preferably, the transmission assembly includes a square rod fixedly installed on the lower end of the synchronous plate near the middle of the base. The lower end of the square rod is configured as an elastic telescopic structure and a connecting sleeve is fixedly installed thereon. An L-shaped connecting rod is slidably installed back and forth inside the connecting sleeve. A fixing plate is fixedly installed at the horizontal end of the L-shaped connecting rod near the middle of the top plate. The end of the fixing plate near the middle of the base is fixedly connected to the corresponding water-cooling plate.

[0012] Preferably, a return spring is connected between the L-shaped connecting rod and the connecting sleeve, and the rear end of the L-shaped connecting rod is located at the end of the connecting sleeve away from the middle of the base and is fixedly installed with a mating rod.

[0013] Preferably, a lower pressure plate is fixedly installed on the side of the lower end of the synchronization plate away from the middle of the base, and an inclined surface is opened on the side of the lower pressure plate near the middle of the base. The upper end of the mating rod is set to be spherical and in contact with the inclined surface of the lower pressure plate.

[0014] Preferably, the two water-cooled plates are arranged alternately, so that when the welding torch moves to the middle of the connecting seat, the two water-cooled plates overlap and begin to move toward opposite sides.

[0015] The beneficial effects of this invention are as follows: First, this invention adopts a segmented staggered welding method on both sides of the web, which effectively avoids the problem of instantaneous heat concentration caused by simultaneous welding on both sides. At the same time, this invention can monitor the temperature of the welding area in real time. When the temperature exceeds the set threshold, it automatically controls the welding torch to stop working and quickly retreats from the welding area, and then quickly cools down the welding area, which significantly reduces the risk of deformation or even burn-through of the thin web due to local overheating, and effectively ensures the welding quality and load-bearing capacity of the H-beam.

[0016] Second, this invention achieves segmented staggered welding of both sides of the web by setting a reciprocating group to drive the welding torch to move back and forth along the length of the web, with the two welding torches initially staggered left and right, ensuring the strength of the welded connection and dispersing the welding heat input. At the same time, the temperature of the welding area is monitored in real time by a temperature sensor. When the temperature is detected to be too high, the electric push rod drives the sliding seat to move the welding torch away from the welding area, and the lifting group simultaneously moves the welding torch upward, realizing the rapid retraction of the welding torch in the horizontal and vertical directions, thereby timely interrupting the heat input and preventing the continuous accumulation of overheating.

[0017] Third, by setting the water-cooled plate and welding torch to move synchronously, this invention ensures that the cooling action and the welding process are precisely coordinated. When the welding torch retracts due to excessive temperature, the connecting assembly drives the top plate and water-cooled plate to quickly approach the web plate, so that the two water-cooled plates simultaneously and tightly adhere to the front and rear sides of the web plate. The accumulated heat in the welding area is quickly removed by water cooling, and the welding area is directly and rapidly cooled down to prevent the accumulated heat from affecting the web plate. At the same time, there is no need to wait for the cooling to subside, which improves the overall welding operation efficiency. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention after the base portion has been removed.

[0021] Figure 3 This is a right view of the sliding seat, telescopic rod, connecting seat, reciprocating assembly, welding torch, and temperature sensor of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the sliding seat, telescopic rod, connecting seat, welding torch, and temperature sensor of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the present invention after part of the top plate has been removed.

[0024] Figure 6 This is a left view of the synchronization plate, square rod, L-shaped connecting rod, water-cooled plate, mating rod, and lower pressure plate of the present invention.

[0025] Figure 7 This is a diagram showing the state of H-beams during welding according to the present invention.

[0026] Figure 8 This is a diagram showing the state of the web of an H-beam during cooling according to the present invention.

[0027] Figure 9 This is a diagram showing the state changes of the water-cooled plate of the present invention as it moves with the welding torch.

[0028] Figure 10 This is a diagram showing the state of the web and flange plates when the invention begins with segmented staggered welding.

[0029] Figure 11 This is a diagram showing the state of welding the web and flange plates at the same position on both sides during the segmented staggered welding process of the two welding torches of the present invention.

[0030] Figure 12 This is a diagram showing the state of the web and flange plates after a segmented, staggered welding process is completed according to the present invention.

[0031] Figure 13 This is a diagram showing the state of the web and flange plates after a section of staggered welding is completed and the second section of staggered welding begins.

[0032] Reference numerals: 1. Base; 11. Mating plate; 2. Conveyor roller; 3. Welding unit; 31. Electric push rod; 32. Sliding seat; 321. Drive rack; 322. Gear; 33. Telescopic rod; 34. Connecting seat; 35. Reciprocating assembly; 351. Slide seat; 352. Threaded rod; 36. Welding torch; 37. Temperature sensor; 38. Lifting assembly; 381. Connecting rod; 382. Lifting rod; 4. Cooling unit; 41. Connecting assembly; 411. Round rod; 412. Connecting block; 413. Driven rack; 42. Top plate; 43. Synchronization assembly; 431. Synchronization plate; 432. Bidirectional screw; 433. Lower pressure plate; 44. Water-cooled plate; 45. Transmission assembly; 451. Square rod; 452. Connecting sleeve; 453. L-shaped connecting rod; 454. Fixing plate; 455. Return spring; 456. Matching rod. Detailed Implementation

[0033] The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where no specific technology or conditions are specified in the embodiments, they shall be performed in accordance with the technology or conditions described in the literature in the field or in accordance with the product manual.

[0034] A prefabricated steel structure component welding device includes a base 1, a conveyor roller 2 installed at the middle of the upper end of the base 1, two welding units 3 arranged symmetrically front and back at the upper end of the base 1, and a cooling unit 4 connecting the welding units 3 and the base 1.

[0035] It should be noted that the left side of the conveyor roller 2 is connected to the external assembly equipment, which is used to position, clamp and initially fix the web and upper and lower flanges according to the cross-sectional shape of the H-beam, and then transport them to the conveyor roller 2 after forming the assembly to be welded. The right side of the conveyor roller 2 is connected to the external straightening equipment, which transports the welded web and flanges to the straightening equipment. The straightening equipment is used to correct the shape of the welded H-beam to eliminate welding deformation and ensure the dimensional accuracy of the component.

[0036] See Figure 1 , Figure 2 , Figure 3 and Figure 5The base 1 has two symmetrically arranged sliding grooves at its upper end. The welding unit 3 includes a sliding seat 32 that is slidably installed in the sliding groove via an electric push rod 31. A connecting seat 34 is installed on the upper end of the sliding seat 32 via multiple telescopic rods 33. A welding torch 36 is installed on the upper end of the connecting seat 34 via a reciprocating assembly 35. The two welding torches 36 are arranged alternately from left to right. A temperature sensor 37 is installed on the reciprocating assembly 35. A lifting assembly 38 is installed on the lower end of the connecting seat 34. The cooling unit 4 includes a top plate 42 that is slidably installed on the upper end of the base 1 via a connecting assembly 41. Two water-cooling plates 44 arranged from left to right are installed on the lower end of the top plate 42 via a synchronization assembly 43.

[0037] It should be noted that the water-cooled plate 44 has a closed cooling channel inside and is connected to the external coolant circulation system through pipes.

[0038] Welding unit 3 adopts a segmented staggered welding method on both sides of the web (see reference). Figure 10 , Figure 12 and Figure 13 The welding unit 36 ​​welds the web BA segment from the front and the web DE segment from the rear. Then, the web and flanges move to the right, and the welding unit 36 ​​welds the web BC segment from the front and the web EF segment from the rear. This process is repeated until the web and flanges are welded. This prevents localized heat concentration in the web during welding. The welding unit 3 can monitor the temperature of the welding area in real time. When the temperature exceeds a set threshold, the welding unit 3 automatically stops operating and quickly retreats from the welding area, thus interrupting heat input and preventing overheating from accumulating. The cooling unit 4 simultaneously and rapidly cools the welding area, preventing accumulated heat from affecting the web. This significantly reduces the risk of deformation or even burn-through due to localized overheating in thinner webs, effectively ensuring the welding quality and load-bearing capacity of the H-beam. Furthermore, it eliminates the need for additional cooling time, improving overall welding efficiency.

[0039] See Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8 Specifically, when welding the web and flange plates is required, the assembled web and flange plates are first transported to the conveyor roller 2 via external assembly equipment. The conveyor roller 2 moves to the right, transporting the web and flange plates. Then, the electric push rod 31 is controlled to move the welding torch 36 to the welding area via the sliding seat 32. Next, the welding torch 36 is started, and the reciprocating assembly 35 is controlled to move the welding torch 36. Since the two welding torches 36 are arranged alternately on the left and right, see [reference needed]. Figure 10 and Figure 12The welding torch 36 on the front side welds the web plate and the flange plate from point B to point A on the web plate, while the welding torch 36 on the rear side welds the web plate and the flange plate from point D to point E on the web plate, so that the two welding torches 36 weld the web plate on both sides alternately.

[0040] After the welding of a section of the web and flange is completed, control the conveyor roller 2 to step to the right again to convey the web and flange. (See reference...) Figure 13 The process involves moving point B on the web plate to the corresponding position of the front welding torch 36, and point F on the web plate to the corresponding position of the rear welding torch 36. Then, the welding torch 36 and the reciprocating assembly 35 are restarted. The front welding torch 36 welds the web plate and flange plate from point B to point C on the web plate, and the rear welding torch 36 welds the web plate and flange plate from point F to point E on the web plate. This operation is repeated until the web plate and flange plate are welded, thus performing segmented staggered welding of the web plate and flange plate. It should be noted that the stepping conveying distance of the conveyor roller 2 is equal to the single reciprocating movement distance of the welding torch 36, ensuring that after the welding torch 36 completes the welding of a section, the conveyor roller 2 accurately conveys the next section to be welded to the welding station, achieving continuous and complete welding operations.

[0041] During welding, the control synchronization group 43 drives the water-cooled plate 44 to move synchronously with the welding torch 36. The temperature sensor 37 monitors the temperature of the welding area of ​​the web and flange plates by the welding torch 36 in real time. When the temperature exceeds the set threshold, the control electric push rod 31 drives the welding torch 36 away from the welding area. At the same time, the lifting group 38 drives the welding torch 36 to move upward through the connecting seat 34, so that the welding torch 36 quickly moves away from the welding area. The connecting group 41 drives the front and rear water-cooled plates 44 to synchronously press against the welding areas on the front and rear sides of the web plate through the top plate 42 to quickly cool the welding area. When the temperature of the welding area decreases, the control electric push rod 31 drives the welding torch 36 to move back to the welding area, and the water-cooled plate 44 can synchronously move away from the web plate, so as to continue welding the web and flange plates. After the welding of the web and flange plates is completed, the conveying roller 2 transports the welded web and flange plates to the right to the straightening equipment.

[0042] It should be noted that the welding torch 36 adopts the submerged arc welding torch of the existing technology. Its welding principle and operation method are existing mature technologies, which will not be elaborated in this article. The temperature sensor 37 is an infrared sensor, which has the characteristics of fast response speed and high temperature measurement accuracy. It can capture the temperature data of the welding point in real time and transmit it to the external control equipment. The temperature setting threshold of the welding area is determined by the technical personnel of this invention according to the actual welding scenario: that is, by conducting multiple welding tests on web plates of different thicknesses and materials, combined with the welding quality requirements, a safe and reasonable temperature threshold is finally determined. When the measured temperature exceeds the threshold, the control equipment immediately issues a command to control the electric push rod 31 to retract, driving the sliding seat 32 and the welding torch 36 away from the welding point.

[0043] It should be noted that in existing H-beam welding, when welding both sides simultaneously, the welding heat is concentrated on both sides of the web, and the web (especially thin webs) bears excessive heat, significantly increasing the risk of weld breakdown. On the other hand, when welding only one side, the stress on both sides of the web is unbalanced, and the welded H-beam is prone to bending, twisting and other deformations, and the amount of deformation is difficult to control, making it difficult to completely correct through subsequent processes. This invention adopts double-sided segmented staggered welding, using two welding torches 36 to alternately and segmentally weld on both sides of the web, so that the heat input is dispersed and uniform. This can effectively reduce local heat concentration and reduce the risk of breakdown. Furthermore, the symmetrical staggered welding sequence offsets some of the welding stress, thereby significantly reducing welding deformation and making it easier to control, ensuring the accuracy of the component's shape. It is especially suitable for high-quality welding of thin-web H-beams.

[0044] It should be further explained that during the staggered welding of the web and flange by the two welding torches 36, when the two welding torches 36 move to the vicinity of the middle of the corresponding connecting seat 34 (see... Figure 11 The front welding torch 36 moves to point G on the web, and the rear welding torch 36 moves to point H on the web. At this time, the two welding torches 36 will weld the same position on both sides of the web. At this time, a heat concentration state similar to simultaneous welding on both sides will be formed in a short period of time. However, the temperature sensor 37 and cooling unit 4 of the present invention can intervene in real time, so the risk of overheating deformation and burn-through at this position can still be effectively controlled. The present invention significantly reduces the duration of high heat risk while ensuring welding continuity, and is especially suitable for high-quality welding of thin-web H-beams.

[0045] See Figure 3 and Figure 4 The reciprocating assembly 35 includes a slide block 351 that is slidably mounted on a connecting seat 34. A threaded rod 352 is connected between the slide block 351 and the connecting seat 34. The threaded rod 352 is fixedly connected to the output shaft of a servo motor 1 fixedly mounted on the right end of the connecting seat 34. The welding torch 36 is mounted on the slide block 351. The temperature sensor 37 is fixedly mounted on the side of the slide block 351 near the middle of the base 1. During welding, the servo motor 1 is started to drive the threaded rod 352 to reciprocate, so that the threaded rod 352 drives the welding torch 36 to move back and forth through the slide block 351 to perform segmented welding of the web and flange. At the same time, the temperature sensor 37 moves synchronously with the slide block 351 to detect the temperature of the welding area.

[0046] To ensure that the welding torch 36 quickly retracts from the welding area when the temperature exceeds a set threshold, the present invention employs the following structure: (See reference) Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8The lifting assembly 38 includes a lifting rod 382 fixedly installed at the lower end of the connecting seat 34 by multiple connecting rods 381. Two symmetrically arranged mating plates 11 are installed at the upper end of the base 1 corresponding to the position of the lifting rod 382. The mating plates 11 are provided with mating grooves. The left and right ends of the lifting rod 382 are slidably installed in the corresponding mating grooves. The mating groove consists of three sections. The front and rear sections of the mating groove are both set as horizontal sections. The two horizontal sections are connected by an inclined section, and the end of the inclined section away from the middle of the base 1 is inclined upward.

[0047] Specifically, initially, the lifting rod 382 is located in the horizontal section of the mating groove near the middle of the base 1. When welding of the web and flange is required, the electric push rod 31 is controlled to move the welding torch 36 in the horizontal plane, thereby enabling welding of webs of different thicknesses. During welding, when the temperature of the welding area exceeds the threshold and the welding torch 36 moves away from the welding area, the connecting seat 34 moves the lifting rod 382 to the inclined section of the mating groove through the connecting rod 381. The inclined section of the mating groove and the lifting rod 382 work together to move the connecting seat 34 upward under the action of the telescopic structure of multiple telescopic rods 33. The connecting seat 34 moves the welding torch 36 upward, causing the welding torch 36 to quickly move away from the welding machine area. Subsequently, the lifting rod 382 moves to the horizontal section of the mating groove away from the middle of the base 1. At this time, the welding torch 36 moves in the horizontal plane, and the welding torch 36 maintains a certain distance from the welding area.

[0048] To ensure rapid cooling of the web plate in case of excessively high temperatures in the welding area, this invention employs the following structure: (See attached diagram) Figure 5 and Figure 9 The synchronization group 43 includes two symmetrically arranged synchronization plates 431 that are slidably mounted on the lower end of the top plate 42. A bidirectional screw 432 is installed between the two synchronization plates 431 and the top plate 42. The bidirectional screw 432 is fixedly connected to the output shaft of the servo motor 2 fixedly mounted on the right end of the top plate 42. The lower end of the synchronization plate 431 is connected to the corresponding water-cooled plate 44 through the transmission group 45. The two water-cooled plates 44 are arranged alternately.

[0049] It should be noted that the bidirectional screw 432 has two threaded sections arranged left and right with opposite directions of rotation. The two synchronous plates 431 are connected to the corresponding threaded sections of the bidirectional screw 432 through threaded engagement. When the servo motor 2 drives the bidirectional screw 432 to rotate, the two threaded sections with opposite directions of rotation on the bidirectional screw 432 drive the two synchronous plates 431 to move synchronously in and out.

[0050] Specifically, when welding the web and flange, the servo motor 2 is started, which drives two synchronous plates 431 to move synchronously via the bidirectional screw 432. One of the synchronous plates 431 is positioned with the welding torch 36 and drives the corresponding water-cooled plate 44 to move synchronously with the welding torch 36. When the welding torch 36 moves to the middle of the connecting seat 34, the two water-cooled plates 44 overlap and begin to move towards the opposite side. At this time, the other synchronous plate 431 is positioned with the welding torch 36 and drives the corresponding water-cooled plate 44 to move synchronously with the welding torch 36. Thus, when the temperature of the welding area is too high, there are always two water-cooled plates 44 arranged in front and behind the web, which are close to the front and rear sides of the web to quickly cool down the welding area of ​​the web.

[0051] See Figure 1 and Figure 2 The connecting assembly 41 includes two symmetrically arranged round rods 411 fixedly installed at the lower end of the top plate 42. A connecting block 412 is fixedly installed at the lower end of the round rods 411, and the connecting block 412 and the base 1 are slidably connected. A driven rack 413 is fixedly installed at the end of the connecting block 412 away from the middle of the base 1. Two symmetrically arranged driving racks 321 are fixedly installed at the end of the sliding seat 32 away from the middle of the base 1. A gear 322 meshes between the driving rack 321 and the corresponding driven rack 413, and the gear 322 is connected to a rotating shaft rotatably installed at the upper end of the base 1. When the sliding seat 32 moves away from the web, the sliding seat 32 drives the connecting block 412 to move closer to the web through the driving rack 321, the gear 322 and the driven rack 413, so that the connecting block 412 drives the water-cooled plate 44 to press tightly against the web through the round rods 411 and the top plate 42, so as to cool the overheated area of ​​the web.

[0052] To avoid microcracks caused by a sudden large temperature difference due to direct contact between the water-cooled plate 44 and the high-temperature welding area of ​​the web plate, this invention adopts the following structure: (See details) Figure 5 , Figure 6 and Figure 8 The transmission assembly 45 includes a square rod 451 fixedly installed on the lower end of the synchronous plate 431 near the middle of the base 1. The lower end of the square rod 451 is configured as an elastic telescopic structure and a connecting sleeve 452 is fixedly installed thereon. An L-shaped connecting rod 453 is slidably installed back and forth inside the connecting sleeve 452. A fixing plate 454 is fixedly installed at the horizontal end of the L-shaped connecting rod 453 near the middle of the top plate 42. The end of the fixing plate 454 near the middle of the base 1 is fixedly connected to the corresponding water-cooling plate 44. A return spring 455 is connected between the L-shaped connecting rod 453 and the connecting sleeve 452. The rear end of the L-shaped connecting rod 453 is located at the end of the connecting sleeve 452 away from the middle of the base 1 and a mating rod 456 is fixedly installed thereon. A lower pressure plate 433 is fixedly installed on the lower end of the synchronous plate 431 away from the middle of the base 1. An inclined surface is opened on the side of the lower pressure plate 433 near the middle of the base 1. The upper end of the mating rod 456 is configured as a ball and is in contact with the inclined surface of the lower pressure plate 433.

[0053] When the top plate 42 moves the water-cooled plate 44 closer to the web, the water-cooled plate 44 initially adheres tightly to the web surface. As the top plate 42 continues to move, the water-cooled plate 44, under the obstruction of the web, causes the L-shaped connecting rod 453 to move away from the web relative to the connecting sleeve 452, compressing the return spring 455. The L-shaped connecting rod 453 drives the mating rod 456 to move synchronously. Under the combined action of the inclined surface of the lower pressure plate 433 and the mating rod 456, the L-shaped connecting rod 453 moves the water-cooled plate 44 downward through the fixed plate 454. At the same time, the elastic extension section of the square rod 451 is stretched, causing the water-cooled plate 44 to gradually move along the web surface from the direction away from the web welding point towards the welding point. This allows the water-cooled plate 44 to gradually cool the welding area of ​​the web that is too hot, preventing the water-cooled plate 44 from directly contacting the high-temperature welding area of ​​the web, thereby ensuring cooling efficiency while further protecting the material properties of the web.

[0054] See Figure 11 During the staggered welding of the web and flange plates by the two welding torches 36, when the two welding torches 36 move to the vicinity of the middle of the corresponding connecting seat 34, the two welding torches weld the same position on both sides of the web plate. At this time, a heat concentration state is formed in a short period of time. When the local temperature of the web plate welding area is too high, the water-cooled plate 44 close to the web plate can first be pressed against the web plate. As the water-cooled plate 44 close to the web plate moves down a certain distance, the water-cooled plate 44 away from the web plate begins to press against the web plate. This allows for the use of a larger heat dissipation area to dissipate heat from the web plate. This enables rapid heat dissipation of the welding area when the two welding torches 36 weld the same position on both sides of the web plate, further ensuring welding efficiency.

[0055] In the automated welding of H-beam steel components, the web and flange plates are first precisely positioned and fixed by external assembly equipment and then conveyed onto the conveyor roller 2 of the device. Next, the electric push rod 31 drives the sliding seat 32 to move, bringing the two staggered welding torches 36 closer to the welding area. The welding torches 36 are then activated and driven by the reciprocating assembly 35 to move back and forth along the length of the web, achieving segmented staggered welding of both sides of the web. During welding, the temperature sensor 37 monitors the temperature of the welding area in real time, and the synchronization assembly 43 moves the water-cooling plate 44 synchronously with the welding torches 36 to ensure precise coordination between cooling and the welding process. When the temperature sensor 37 detects that the temperature exceeds the set threshold, the electric push rod 31 drives the sliding seat 32 to move the welding torches 36 horizontally away from the welding area, and the lifting assembly 38 simultaneously moves the welding torches 36 vertically upward, achieving welding torch... The welding torch 36 quickly retreats from the welding area, while the connecting assembly 41 drives the water-cooled plate 44 to press tightly against the front and rear sides of the web, quickly removing accumulated heat through water cooling. After the temperature drops to a safe range, the welding torch 36 resets and welding continues. The conveyor roller 2 steps to transport the component to complete the continuous welding operation. Finally, the welded component is transported by the conveyor roller 2 to the subsequent straightening equipment. Through the synergistic effect of segmented staggered welding, real-time temperature monitoring, rapid retreat of the welding torch 36, and synchronous precise water cooling, the risk of local overheating deformation or burn-through of the web is avoided, while ensuring the weld strength and component shape accuracy. At the same time, there is no need to wait for additional cooling, which greatly improves the welding efficiency and H-beam welding quality. The entire welding process significantly improves the welding quality, reliability, and production efficiency of thin-web H-beams without interrupting the overall operation cycle or requiring manual intervention.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0057] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A welding device for prefabricated steel structure components, comprising a base, a conveyor roller conveyor installed at the middle of the upper end of the base, and two welding units symmetrically arranged front and rear on the upper end of the base, characterized in that, A cooling unit is connected between the welding unit and the base; The upper end of the base has two symmetrically arranged sliding grooves. The welding unit includes a sliding seat that is slidably installed in the sliding groove via an electric push rod. A connecting seat is installed on the upper end of the sliding seat via multiple telescopic rods. A welding torch is installed on the upper end of the connecting seat via a reciprocating assembly. The two welding torches are arranged alternately from left to right. During welding, the reciprocating assembly drives the two welding torches to weld alternately on both sides of the web plate. A temperature sensor is installed on the reciprocating assembly, and a lifting assembly is installed at the lower end of the connecting seat; The cooling unit includes a top plate that is slidably mounted on the upper part of the base via a connecting group. Two water-cooled plates arranged on the left and right are mounted on the lower part of the top plate via a synchronization group. The synchronization group drives the water-cooled plates to move synchronously with the corresponding welding torch. When the temperature sensor detects that the temperature at the welding point is too high, the sliding seat drives the welding torch away from the welding area, and the lifting group drives the welding torch to move upward, so that the welding torch quickly moves away from the welding point of the web plate. At the same time, the connecting group drives the water-cooled plates to fit tightly against the front and rear sides of the web plate to quickly cool down the welding point.

2. The prefabricated steel structure component welding device according to claim 1, characterized in that, The reciprocating assembly includes a slide block that slides left and right on a connecting seat. A threaded rod connects the slide block and the connecting seat. The threaded rod is fixedly connected to the output shaft of a servo motor that is fixedly installed at the right end of the connecting seat. A welding torch is installed on the slide block, and a temperature sensor is fixedly installed on the side of the slide block near the middle of the base.

3. The prefabricated steel structure component welding device according to claim 1, characterized in that, The lifting assembly includes a lifting rod fixedly installed at the lower end of the connecting seat by multiple connecting rods. Two mating plates are installed on the upper end of the base corresponding to the position of the lifting rod. The mating plates are provided with mating grooves, and the left and right ends of the lifting rod are slidably installed in the corresponding mating grooves.

4. The prefabricated steel structure component welding device according to claim 3, characterized in that, The mating groove consists of three sections. The front and rear sections of the mating groove are both horizontal sections, and the two horizontal sections are connected by an inclined section. The inclined section is inclined upward at the end away from the middle of the base.

5. The prefabricated steel structure component welding device according to claim 1, characterized in that, The connecting assembly includes two symmetrically arranged round rods fixedly installed at the lower end of the top plate. A connecting block is fixedly installed at the lower end of the round rods, and the connecting block and the base are slidably connected. A driven rack is fixedly installed at the end of the connecting block away from the middle of the base. Two symmetrically arranged driving racks are fixedly installed at the end of the sliding seat away from the middle of the base. A gear meshes between the driving rack and the corresponding driven rack, and the gear is connected to a rotating shaft rotatably installed at the upper end of the base.

6. The prefabricated steel structure component welding device according to claim 1, characterized in that, The synchronization group includes two symmetrically arranged synchronization plates that slide left and right on the lower end of the top plate. A bidirectional screw is installed between the two synchronization plates and the top plate. The bidirectional screw is fixedly connected to the output shaft of the second servo motor fixedly installed on the right end of the top plate. The lower end of the synchronization plate is connected to the corresponding water-cooled plate through a transmission group.

7. The prefabricated steel structure component welding device according to claim 6, characterized in that, The transmission assembly includes a square rod fixedly installed on the lower end of the synchronous plate near the middle of the base. The lower end of the square rod is configured as an elastic telescopic structure and a connecting sleeve is fixedly installed. An L-shaped connecting rod is slidably installed in the connecting sleeve. A fixing plate is fixedly installed at the horizontal end of the L-shaped connecting rod near the middle of the top plate. The fixing plate is fixedly connected to the corresponding water-cooling plate at the end near the middle of the base.

8. The prefabricated steel structure component welding device according to claim 7, characterized in that, A return spring is connected between the L-shaped connecting rod and the connecting sleeve. The rear end of the L-shaped connecting rod is located at the end of the connecting sleeve away from the middle of the base and is fixedly installed with a mating rod.

9. A prefabricated steel structure component welding device according to claim 8, characterized in that, A lower pressure plate is fixedly installed on the side of the lower end of the synchronization plate away from the middle of the base. The side of the lower pressure plate near the middle of the base has an inclined surface. The upper end of the mating rod is spherical and contacts the inclined surface of the lower pressure plate.

10. A prefabricated steel structure component welding device according to claim 1, characterized in that, The two water-cooled plates are arranged alternately, one in front of the other. When the welding torch moves to the middle of the connecting seat, the two water-cooled plates overlap and begin to move towards the opposite side.

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