A continuous welding production line for lattice type arches

Abstract

This invention discloses a continuous welding production line for a grid-type arch frame, belonging to the technical field of welding equipment. The production line includes a processing table and a welding table. The welding table is located on one side of the processing table, and a welding robotic arm is slidably mounted on the top of the welding table. Several jigs are mounted on the top of the processing table, and several rectangularly distributed main ribs are shared among these jigs. Two butterfly ribs are among the main ribs. Several positioning tables are fixedly mounted on the processing table, and a rotating table is rotatably connected to the top of each positioning table. The rotating table has a rotating cavity, and an adjustment mechanism for driving the swing plate is located within the rotating cavity. This invention, by providing a flipping plate and a fixing mechanism on the sidewall of the butterfly ribs, allows the butterfly ribs to be automatically fixed in their current position when placed in the corresponding position of the main ribs. This facilitates welding the butterfly ribs onto the main ribs by the welding robotic arm, resulting in a more stable grid arch frame structure.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment technology, and specifically relates to a continuous welding production line for a grid-type arch frame. Background Technology

[0002] The grid arch is an important steel support component in the initial support system of tunnels and underground engineering. It is mainly made of ordinary steel bars through welding. It is generally a three-dimensional structure formed by welding main bars and stirrups. Common cross-sectional shapes include triangles, quadrilaterals or arches. Its interior is reinforced and connected by steel bars bent into "W" or "8" shapes to form a hollow grid structure. Because its structure is hollow, when shotcrete is applied, the concrete slurry can pass through the gaps in the grid and fill the gaps between the steel bars. When the shotcrete solidifies, the grid arch is tightly bonded to the concrete, which actually forms a reinforced concrete arch. This makes full use of both the tensile strength of steel and the compressive strength of concrete.

[0003] The general process of producing grid arch frames is as follows: First, the raw materials are transported to the loading position of the warehouse, and then the loading is carried out in stages. The raw materials are automatically transported to the welding position, where the robotic arm welds the raw materials. Then, the robotic arm automatically assembles and welds the grid arch frames. Next, the robotic arm grabs the butterfly reinforcement and feeds it, and then welds it onto the grid arch frames. Finally, the grid arch frames are cut to length. In this process, the main function of the continuous welding production line is to weld the butterfly ribs to the main ribs. The butterfly ribs are firmly connected to the upper and lower main ribs and web ribs through overlapping welding to form a stable three-dimensional spatial truss structure with a defined geometric shape. This whole structure is called a grid arch. Therefore, the butterfly ribs themselves also need to have a curvature, and the curvature of the butterfly ribs needs to be closely fitted with the main ribs before welding. The welding work can be carried out by plasma welding by a robotic arm, but the step of attaching the butterfly ribs to the side wall of the main ribs needs to be done manually by the workers. If the overlapping position of the butterfly ribs and the main ribs is not accurate or the overlapping is not tight enough, misalignment may occur when the welding robotic arm is used for automatic welding later. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a continuous welding production line for grid-type arch frames.

[0005] The technical solution adopted to solve the above technical problems is: a grid-type arch frame continuous welding production line, including a processing table and a welding table. The welding table is set on one side of the processing table. A welding robot arm is slidably set on the top of the welding table. Several jigs are set on the top of the processing table. Several rectangular main ribs are set in the several jigs. Two butterfly ribs are set in the several main ribs. A number of positioning tables are fixedly installed on the processing table. A rotating table is rotatably connected to the top of the positioning table. Two swing plates are rotatably installed at both ends of the top of the rotating table. A stop rod is fixedly installed on the top of the swing plate. A stop wheel is rotatably connected to the side wall of the stop rod. The side wall of the stop wheel abuts against the main rib. A rotating cavity is opened in the rotating table. An adjustment mechanism for driving the swing plates is installed in the rotating cavity. Two positioning plates are provided between the two butterfly tendons. The positioning plates are arc-shaped at the end facing the butterfly tendons. A central rod is rotatably connected to the bottom center of the positioning plate. The other end of the central rod is fixedly connected to the top of the rotating platform. A telescopic rod is rotatably connected to the bottom of the central rod away from the butterfly tendons. A connecting button is rotatably connected to the other end of the telescopic rod. Rotating plates are rotatably connected to the top of the two abutment rods respectively. The ends of the two rotating plates away from the abutment rods are rotatably connected to the side wall of the connecting button respectively. A support block is fixedly installed on the top of the rotating platform. The top of the support block is arc-shaped and abuts against the bottom of the two butterfly ribs. Two flip plates are rotatably connected to both ends of the support block. The two flip plates abut against the side walls of the two butterfly ribs respectively. A working cavity is opened in the support block, and a fixing mechanism for rotating the flip plates is provided in the working cavity.

[0006] By using the above technical solution, a flip-up plate and a fixing mechanism are set on the side wall of the butterfly reinforcement, so that when the butterfly reinforcement is placed in the corresponding position of the main reinforcement, it can be automatically fixed in the current position, which makes it convenient for the welding robot arm to weld it to the main reinforcement, making the structure of the grid arch frame more stable.

[0007] Furthermore, the positioning plate has a clearance hole on its side wall, and the size of the clearance hole is larger than the size of the flip plate.

[0008] With the above technical solution, the two flip plates are in a closed state before the butterfly tendon is placed in place. Therefore, in order to avoid the positioning plate from affecting the flip plate's rotation, it is necessary to set a clearance hole on the side wall of the positioning plate to facilitate the movement of the flip plate.

[0009] Furthermore, the positions of the positioning platforms are distributed in accordance with the curvature of the main rib, and the positioning platforms are located between two corresponding jigs.

[0010] With the above technical solution, since a support block is placed on the top of the positioning platform, and the support block is directly used to support the butterfly rib, the position of the positioning platform will directly affect the position of the butterfly rib. In order to facilitate welding the butterfly rib to the main rib, the positioning platform needs to be set at a position consistent with the curvature of the main rib.

[0011] Furthermore, the adjustment mechanism includes a servo motor, a main gear, a first side gear, a connecting gear, a second side gear, and two support rods. The servo motor is fixedly installed in the rotating cavity, and the main gear is fixedly installed at the output end of the servo motor. The first side gear and the connecting gear mesh with the main gear respectively, and the second side gear meshes with the other side of the connecting gear. The two support rods are fixedly installed on the top of the first side gear and the second side gear respectively, and the support rods pass through the top of the rotating cavity and are fixedly connected to the bottom of the swing plate.

[0012] Through the above technical solution, the rotation of the servo motor will cause the main gear to rotate, and the first side gear and the connecting gear that mesh with the main gear will rotate accordingly. The rotation of the connecting gear will drive the second side gear to rotate. Due to the connecting effect of the connecting gear, the first side gear and the second side gear will rotate in opposite directions, thereby causing the two abutting wheels to abut against the two main rib side walls respectively.

[0013] Furthermore, a fixed ring is rotatably connected to the outside of the central rod, and a telescopic plate is fixedly connected to the side wall of the fixed ring. The other end of the telescopic plate is rotatably connected to the bottom of the connecting button.

[0014] With the above technical solution, the fixing ring is restricted to a specified height of the center rod. Therefore, the telescopic plate will only rotate on the horizontal plane where the fixing ring is located. Since the curvature of the main rib will be slightly different, the position of the abutment wheel will also be different, which will make the position of the connecting button different. Therefore, by setting a telescopic plate, the position of the connecting button will always be supported by the telescopic plate.

[0015] Furthermore, the shape of the flip-up plate is semi-circular, and the arc-shaped end of the flip-up plate abuts against the side wall of the butterfly tendon.

[0016] Through the above technical solution, the butterfly tendon itself has a curvature. Therefore, in order to firmly abut the butterfly tendon against the side wall of the main tendon, a flapper plate that matches the curvature of the butterfly tendon is required. At the same time, the semi-circular design also makes it easy for the flapper plate to unfold from its original closed state to abut the butterfly tendon.

[0017] Furthermore, the fixing mechanism includes a dual-axis motor, a drive rod, a drive bevel gear, a retainer, a bottom bevel gear, an inner rod, a top bevel gear, an outer rod, a top rod, and a side rod. The dual-axis motor is fixedly installed in the working chamber. The drive rod is fixedly installed at the output end of the dual-axis motor. The retainer is fixedly installed inside the working chamber. The retainer is a U-shaped frame with its opening facing away from the dual-axis motor. The drive rod passes through the side wall of the retainer and is fixedly connected to the side wall of the drive bevel gear. The bottom bevel gear and the top bevel gear are rotatably connected to the side wall of the retainer. The bottom bevel gear and the top bevel gear also mesh with the drive bevel gear. The inner rod is fixedly installed at the top of the bottom bevel gear. The outer rod has a through hole inside, through which the inner rod passes. The top rod is fixedly installed at the top of the inner rod. The side wall of the top rod is fixedly connected to the side wall of one of the flip plates. The side rod is fixedly installed on the side wall of the outer rod and is fixedly connected to the side wall of the other flip plate.

[0018] Through the above technical solution, the operation of the dual-axis motor will drive the drive rod to rotate, which in turn will drive the drive bevel gear to rotate. The bottom bevel gear and the top bevel gear, which mesh with the drive bevel gear, will rotate together. Moreover, the bottom bevel gear and the top bevel gear will rotate in opposite directions. The inner rod fixed to the side wall of the bottom bevel gear can pass through the through hole. Therefore, the top rod fixed to the side wall of the inner rod and the side rod fixed to the side wall of the outer rod will drive the two flip plates to unfold in opposite directions, thereby blocking the position of the butterfly rib, making it convenient for the welding robot arm to weld it to the main rib.

[0019] Furthermore, a rotating ring is rotatably connected to the side wall of the outer rod, and a supplementary rod is fixedly connected to the side wall of the rotating ring. The side wall of the supplementary rod is fixedly connected to the side wall of the flip plate corresponding to the top rod.

[0020] With the above technical solution, since the position where the top rod is fixedly connected to the flip-up plate is not in the middle of the flip-up plate, in order to ensure the stable support effect of the flip-up plate on the butterfly tendon, it is best to set another rod at the symmetrical position of the flip-up plate for balance. Therefore, in this application, a supplementary rod and a rotating ring are set to balance the applied force.

[0021] Furthermore, both of the side walls of the flip-up plates are provided with placement slots, the positions of which correspond to the positions of the top rod, the side rod, and the supplementary rod.

[0022] As mentioned earlier, the two flip-up panels are in a closed state in the initial stage using the above technical solution. Therefore, by setting multiple placement slots on the side wall of the flip-up panels, the top rod, side rod, and supplementary rod can be accommodated in them, so that the two flip-up panels can be better closed together.

[0023] Furthermore, limiting plates are fixedly installed on the two side walls of the support block, and the two limiting plates abut against the two butterfly tendon side walls respectively, and the top of the limiting plates is arc-shaped.

[0024] With the above technical solution, during the placement of the butterfly reinforcement, since the butterfly reinforcement does not yet have support from the side, there may be a slippage phenomenon. In order to prevent the butterfly reinforcement from slipping, it is necessary to use both a positioning plate and a limiting plate. By placing the butterfly reinforcement in the middle position between the positioning plate and the limiting plate, it can be ensured that the butterfly reinforcement can be placed vertically in the corresponding position of the main reinforcement, thereby facilitating the welding robot arm to weld it.

[0025] The beneficial effects of this invention are as follows: This invention provides a flip-up plate and a fixing mechanism on the side wall of the butterfly rib. When the butterfly rib is placed in the corresponding position of the main rib, the rotation of the dual-axis motor can drive the two flip-up plates to rotate respectively. Both sides of the butterfly rib will be supported by the flip-up plates, thereby fixing the butterfly rib in the current position. Subsequently, it can be easily welded to the main rib by the welding robot arm. The firmly welded butterfly rib and main rib can make the structure of the grid arch frame more stable and effectively improve the welding quality. This invention incorporates an adjustment mechanism within a rotating platform. The rotation of the servo motor causes the main gear to rotate, and the first side gear and connecting gear meshing with the main gear will rotate accordingly. The rotation of the connecting gear, in turn, drives the second side gear to rotate. Due to the connecting action of the connecting gear, the first and second side gears rotate in opposite directions, causing the two abutment wheels to abut against the side walls of the two main ribs respectively. Since the curvature of the main ribs varies slightly each time, the abutment wheels abutting against the side walls of the main ribs can drive the rotating platform, rotating plate, and connecting button to move together, ensuring that the connecting button is always positioned on the vertical line between the two abutment wheels. This allows the positioning plate to be positioned in the middle of the two main ribs, facilitating the placement of the butterfly rib into the corresponding position on the main rib. This invention utilizes a semi-circular abutment plate and placement grooves on the sidewall of the butterfly reinforcement. Since the butterfly reinforcement itself has a curvature, a abutment plate matching the curvature of the butterfly reinforcement is needed to firmly abut the butterfly reinforcement against the sidewall of the main reinforcement. The placement grooves are designed because the two abutment plates are initially closed. Therefore, by setting multiple placement grooves on the sidewall of the abutment plate, the top rod, side rod, and supplementary rod can be accommodated, allowing the two abutment plates to be better closed together, thus facilitating the fixing of the main reinforcement into the fixture. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the structural connection between the fixture, main rib, and butterfly rib in this invention; Figure 3 This is a schematic diagram of the structural connection between the main rib, the butterfly rib, and the positioning platform in this invention. Figure 4 This is a schematic diagram of the structural connection between the butterfly tendon and the positioning plate in this invention; Figure 5 yes Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a first-view structural diagram of the positioning stage and the rotating stage in this invention; Figure 7 This is a second-view structural diagram of the positioning stage and the rotating stage in this invention; Figure 8 This is a cross-sectional view of the rotating platform in this invention; Figure 9 yes Figure 8 A magnified view of a section at point B in the middle; Figure 10 This is a schematic diagram of the support platform in this invention; Figure 11 This is a schematic diagram of the fixing mechanism in this invention; Figure 12 This is a schematic diagram of the structural connection between the cage, the bottom bevel gear, and the top bevel gear in this invention.

[0027] Reference numerals: 1. Machining table; 2. Welding table; 3. Welding robotic arm; 4. Fixture; 5. Main rib; 6. Butterfly rib; 7. Positioning table; 8. Rotating table; 9. Swinging plate; 10. Support rod; 11. Support wheel; 12. Positioning plate; 13. Center rod; 14. Telescopic rod; 15. Connecting button; 16. Rotating plate; 17. Support block; 18. Flipping support plate; 19. Clearance hole; 20. Servo motor; 21. Main gear; 22. First side gear 23. Wheel; 24. Connecting gear; 25. Second side gear; 26. Support rod; 27. Fixing ring; 28. Telescopic plate; 29. ​​Dual-axis motor; 30. Drive rod; 31. Drive bevel gear; 32. Cage; 33. Bottom bevel gear; 34. Inner rod; 35. Top bevel gear; 36. Outer rod; 37. Top rod; 38. Side rod; 39. Through hole; 40. Rotating ring; 41. Supplementary rod; 42. Placement slot; 43. Limiting plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] like Figure 1 - Figure 3 As shown, this embodiment provides a continuous welding production line for a grid-type arch frame, including a processing table 1 and a welding table 2. The welding table 2 is disposed on one side of the processing table 1, and a welding robotic arm 3 is slidably disposed on the top of the welding table 2. Several jigs 4 are disposed on the top of the processing table 1, and several rectangularly distributed main ribs 5 are disposed in the several jigs 4. Two butterfly ribs 6 are disposed in the several main ribs 5. There are various ways to place the main ribs 5 in the middle of the jigs 4, such as using a robotic arm, but these are not related to the innovation of this application, so the specific placement method is not described here.

[0030] Combined Figure 4 As can be seen from the content, several positioning tables 7 are fixedly installed on the processing table 1. A rotating table 8 is rotatably connected to the top of the positioning table 7. The positions of the positioning tables 7 are consistent with the curvature of the main rib 5. The positioning tables 7 are located between two corresponding jigs 4. Since a support block 17 is placed on the top of the positioning table 7, and the support block 17 is directly used to support the butterfly rib 6, the position of the positioning table 7 will directly affect the position of the butterfly rib 6. In order to facilitate the welding of the butterfly rib 6 to the main rib 5, the positioning table 7 needs to be set in a position consistent with the curvature of the main rib 5.

[0031] like Figure 6 - Figure 9 As shown in the content, two swing plates 9 are rotatably mounted at both ends of the top of the rotating platform 8. A stop rod 10 is fixedly mounted on the top of the swing plate 9. A stop wheel 11 is rotatably connected to the side wall of the stop rod 10. The side wall of the stop wheel 11 abuts against the main rib 5. A rotating cavity is opened in the rotating platform 8. An adjustment mechanism for driving the swing plates 9 is set in the rotating cavity. The adjustment mechanism includes a servo motor 20, a main gear 21, a first side gear 22, a connecting gear 23, a second side gear 24, and two support rods 25. The servo motor 20 is fixedly mounted in the rotating cavity. The main gear 21 is fixedly mounted at the output end of the servo motor 20. The first side gear 22 and the connecting gear 23 mesh with the main gear 21, respectively. The second side gear 24 meshes with the other side of the connecting gear 23. Two support rods 25 are respectively fixedly installed on the top of the first side gear 22 and the second side gear 24. The support rods 25 pass through the top of the rotating cavity and are fixedly connected to the bottom of the swing plate 9. The rotation of the servo motor 20 will cause the main gear 21 to rotate. The first side gear 22 and the connecting gear 23 meshing with the main gear 21 will rotate accordingly. The rotation of the connecting gear 23 will drive the second side gear 24 to rotate. Due to the connecting action of the connecting gear 23, the first side gear 22 and the second side gear 24 will rotate in opposite directions, thereby causing the two abutment wheels 11 to abut against the side walls of the two main ribs 5 respectively.

[0032] A central rod 13 is rotatably connected to the bottom center of the positioning plate 12. The other end of the central rod 13 is fixedly connected to the top of the rotating platform 8. A telescopic rod 14 is rotatably connected to the bottom of the central rod 13 away from the butterfly rib 6. A connecting button 15 is rotatably connected to the other end of the telescopic rod 14. Rotating plates 16 are rotatably connected to the tops of the two abutment rods 10. The ends of the two rotating plates 16 away from the abutment rods 10 are rotatably connected to the side wall of the connecting button 15. There are many ways to place the butterfly rib 6 into the main rib 5, such as using a robotic arm to grasp it. Since it is not related to the innovation of this application, the specific placement method will not be described here.

[0033] We can designate the positions of the two abutments 10 as points A and B, respectively, and the rotational connection point of the two rotating plates 16 as point P. Since the two rotating plates 16 have the same length, the length of line segment PA is equal to the length of line segment PB. Thus, points P, A, and B form an isosceles triangle △PAB, where PA and PB are two equal legs, and AB is the base. In an isosceles triangle, there is a very important property: the median, altitude, and angle bisector drawn from vertex P to the base AB coincide. This means that the line segment PM connecting vertex P and the midpoint M of the base is also the altitude of the base AB. That is, line segment PM is perpendicular to line segment AB. If a line segment passes through the midpoint of AB and is perpendicular to AB, then the line containing this line segment is the perpendicular bisector of AB. Therefore, no matter where the two moving blocks A and B move outward, the rotation point P is always located on the perpendicular bisector of line segment AB, thus ensuring that the connecting button 15 and the positioning plate 12 are always positioned between the two main ribs 5.

[0034] Two positioning plates 12 are provided between the two butterfly ribs 6. The end of the positioning plate 12 facing the butterfly rib 6 is arc-shaped. The side wall of the positioning plate 12 is provided with a clearance hole 19. The size of the clearance hole 19 is larger than the size of the flip plate 18. When the butterfly rib 6 is not yet in place, the two flip plates 18 are in a closed state. Therefore, in order to avoid the positioning plate 12 from affecting the flip plate 18, clearance holes 19 need to be provided on the side wall of the positioning plate 12 to facilitate the movement of the flip plate 18.

[0035] from Figure 7 As can be seen from the content, a fixed ring 26 is rotatably connected to the outside of the central rod 13, and a telescopic plate 27 is fixedly connected to the side wall of the fixed ring 26. The other end of the telescopic plate 27 is rotatably connected to the bottom of the connecting button 15. The fixed ring 26 is restricted to a specified height of the central rod 13. Therefore, the telescopic plate 27 will only rotate on the horizontal plane where the fixed ring 26 is located. Since the curvature of the main rib 5 will be slightly different, the position of the abutment wheel 11 will also be different. This will cause the position of the connecting button 15 to be different. Therefore, by setting a telescopic plate 27, the position of the connecting button 15 can always be supported by the telescopic plate 27.

[0036] Reference Figure 5 and Figure 6 It is known that a support block 17 is fixedly installed on the top of the rotating table 8. The top of the support block 17 is arc-shaped and abuts against the bottom of the two butterfly ribs 6. Limiting plates 42 are fixedly installed on the side walls of the support block 17 respectively. The side walls of the two limiting plates 42 abut against the side walls of the two butterfly ribs 6 respectively. The top of the limiting plates 42 is arc-shaped. During the placement of the butterfly ribs 6, since the butterfly ribs 6 do not yet have support from the side, there may be a slippage phenomenon. In order to prevent the butterfly ribs 6 from slipping, the positioning plate 12 and the limiting plate 42 need to be used at the same time. The butterfly ribs 6 are placed in the middle position of the positioning plate 12 and the limiting plate 42, which can ensure that the butterfly ribs 6 can be placed vertically in the corresponding position of the main rib 5, so as to facilitate the welding robot arm 3 to weld them.

[0037] Reference Figure 5 and Figure 10 The support block 17 has two rotating connecting plates 18 at both ends. The two connecting plates 18 abut against the side walls of the two butterfly tendons 6 respectively. The shape of the connecting plates 18 is semi-circular. The arc end of the connecting plates 18 abuts against the side wall of the butterfly tendon 6. The butterfly tendon 6 itself has an arc. Therefore, in order to firmly abut against the side wall of the main tendon 5, it is necessary to use a connecting plate 18 that matches the arc of the butterfly tendon 6. At the same time, the semi-circular design also makes it easy for the connecting plates 18 to unfold from the original closed state to the state of abutting against the butterfly tendon 6.

[0038] Reference Figure 11 and Figure 12As can be seen from the content, the support block 17 has a working cavity, and a fixing mechanism for rotating the flip plate 18 is provided in the working cavity. The fixing mechanism includes a dual-axis motor 28, a drive rod 29, a drive bevel gear 30, a retainer 31, a bottom bevel gear 32, an inner rod 33, a top bevel gear 34, an outer rod 35, a top rod 36, and a side rod 37. The dual-axis motor 28 is fixedly installed in the working cavity, the drive rod 29 is fixedly installed at the output end of the dual-axis motor 28, and the retainer 31 is fixedly installed inside the working cavity. The retainer 31 is a U-shaped frame with an opening facing away from the dual-axis motor 28. The drive rod 29 passes through the side wall of the retainer 31 and is fixedly connected to the side wall of the drive bevel gear 30. The bottom bevel gear 32 and the top bevel gear 34 are rotatably connected to the side wall of the retainer 31 and also mesh with the drive bevel gear 30. The inner rod 33 is fixedly installed at the top of the bottom bevel gear 32, and the outer rod 35 is fixedly installed at the top of the top bevel gear 34. The part has a through hole 38, through which the inner rod 33 passes. The top rod 36 is fixedly installed on the top of the inner rod 33. The side wall of the top rod 36 is fixedly connected to the side wall of one of the flip plates 18. The side rod 37 is fixedly installed on the side wall of the outer rod 35. The side wall of the side rod 37 is fixedly connected to the side wall of the other flip plate 18. The operation of the dual-axis motor 28 will drive the drive rod 29 to rotate, which in turn will drive the drive bevel gear 30 to rotate. The bottom bevel gear 32 and the top bevel gear 34, which mesh with the drive bevel gear 30, will rotate together. The bottom bevel gear 32 and the top bevel gear 34 will rotate in opposite directions. The inner rod 33, which is fixed to the side wall of the bottom bevel gear 32, can pass through the through hole 38. Therefore, the top rod 36, which is fixed to the side wall of the inner rod 33, and the side rod 37, which is fixed to the side wall of the outer rod 35, will drive the two flip plates 18 to unfold in opposite directions, thereby blocking the position of the butterfly rib 6, so that the welding robot arm 3 can weld it to the main rib 5.

[0039] refer to Figure 10 As can be seen from the content, the outer rod 35 has a rotating ring 39 rotatably connected to its side wall, and a supplementary rod 40 is fixedly connected to the side wall of the rotating ring 39. The side wall of the supplementary rod 40 is fixedly connected to the side wall of the flip plate 18 corresponding to the top rod 36. Since the position where the top rod 36 is fixedly connected to the flip plate 18 is not in the middle position of the flip plate 18, in order to ensure the stable bearing effect of the flip plate 18 on the butterfly tendon 6, it is best to set another rod at the symmetrical position of the flip plate 18 for balance. Therefore, in this application, the supplementary rod 40 and the rotating ring 39 are set to balance the applied force.

[0040] Both flip-up plates 18 have placement slots 41 on their side walls. The positions of the placement slots 41 correspond to the positions of the top rod 36, the side rod 37, and the supplementary rod 40. Since the two flip-up plates 18 are in a closed state in the initial state, multiple placement slots 41 are provided on the side walls of the flip-up plates 18 to accommodate the top rod 36, the side rod 37, and the supplementary rod 40, so that the two flip-up plates 18 can be better closed together.

[0041] The working principle of this embodiment is as follows: In the initial state, the two flip plates 18 are in the closed state. Then, the rectangular main ribs 5 are placed at the position of the jig 4 and fixed. After the position of the main ribs 5 is fixed, the servo motor 20 is started. The rotation of the servo motor 20 will cause the main gear 21 to rotate. The first side gear 22 and the connecting gear 23 that mesh with the main gear 21 will rotate accordingly. The rotation of the connecting gear 23 will drive the second side gear 24 to rotate. Due to the connecting action of the connecting gear 23, the first side gear 22 and the second side gear 24 will rotate in opposite directions. This causes the two abutment wheels 11 to abut against the side walls of the two main ribs 5 respectively. The movement of the abutment wheels 11 will drive the rotating table 8 to rotate and cause the rotating plate 16 at the top of the abutment rod 10 to rotate. Then, the connecting button 15 at the other end of the rotating plate 16 will drive the telescopic rod 14 and one end of the positioning plate 12 to rotate, so that the positioning plate 12 can be in the middle position of the main ribs 5, which is convenient for the subsequent placement of the butterfly ribs 6. Then, the worker can place the butterfly rib 6 between the positioning plate 12 and the limiting plate 42. Under the combined action of the positioning plate 12 and the limiting plate 42, the butterfly rib 6 can be placed vertically in the middle of the main rib 5. The worker then starts the dual-axis motor 28. The operation of the dual-axis motor 28 will drive the drive rod 29 to rotate, and the drive rod 29 will drive the drive bevel gear 30 to rotate. The bottom bevel gear 32 and the top bevel gear 34, which mesh with the drive bevel gear 30, will rotate together. The bottom bevel gear 32 and the top bevel gear 34 will rotate in opposite directions. The inner rod 33 fixed to the side wall of the bottom bevel gear 32 can pass through the through hole 38. Therefore, the top rod 36 fixed to the side wall of the inner rod 33 and the side rod 37 fixed to the side wall of the outer rod 35 will drive the two flip plates 18 to unfold in opposite directions, thereby blocking the position of the two butterfly ribs 6, so that the butterfly rib 6 is firmly fixed to the main rib 5, which makes it convenient for the welding robot arm 3 to weld it to the main rib 5, thus ensuring the welding quality of the grid arch frame.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A continuous welding production line for a grid-type arch frame, characterized in that, It includes a processing table (1) and a welding table (2). The welding table (2) is set on one side of the processing table (1). A welding robot arm (3) is slidably set on the top of the welding table (2). Several jigs (4) are set on the top of the processing table (1). Several rectangular main ribs (5) are set in the several jigs (4). Two butterfly ribs (6) are set in the several main ribs (5). The processing table (1) is fixedly provided with several positioning tables (7). The top of the positioning table (7) is rotatably connected to a rotating table (8). Two swing plates (9) are rotatably provided at both ends of the top of the rotating table (8). A stop rod (10) is fixedly provided on the top of the swing plate (9). A stop wheel (11) is rotatably connected to the side wall of the stop rod (10). The side wall of the stop wheel (11) abuts against the main rib (5). A rotating cavity is provided in the rotating table (8). An adjustment mechanism for driving the swing plate (9) is provided in the rotating cavity. Two positioning plates (12) are provided between the two butterfly tendons (6). The end of the positioning plate (12) facing the butterfly tendon (6) is arc-shaped. A central rod (13) is rotatably connected to the middle of the bottom of the positioning plate (12). The other end of the central rod (13) is fixedly connected to the top of the rotating platform (8). A telescopic rod (14) is rotatably connected to the bottom of the end of the central rod (13) away from the butterfly tendon (6). A connecting button (15) is rotatably connected to the other end of the telescopic rod (14). Rotating plates (16) are rotatably connected to the top of the two abutment rods (10). The ends of the two rotating plates (16) away from the abutment rods (10) are rotatably connected to the side wall of the connecting button (15). The top of the rotating platform (8) is fixedly provided with a support block (17). The top of the support block (17) is arc-shaped. The top of the support block (17) abuts against the bottom of the two butterfly ribs (6). The two ends of the support block (17) are respectively rotatably connected to two flip plates (18). The two flip plates (18) abut against the side walls of the two butterfly ribs (6). The support block (17) is provided with a working cavity. The working cavity is provided with a fixing mechanism for rotating the flip plates (18). A welding head is provided at the top of the welding robot arm, and the welding head welds the butterfly rib (6) onto the curved surface of the main rib (5) by plasma arc welding.

2. The continuous welding production line for grid-type arch frames according to claim 1, characterized in that, The positioning plate (12) has a clearance hole (19) on its side wall, and the size of the clearance hole (19) is larger than the size of the flip plate (18).

3. The continuous welding production line for grid-type arch frames according to claim 1, characterized in that, The positions of several positioning platforms (7) are consistent with the curvature of the main rib (5), and the positioning platforms (7) are located between two corresponding jigs (4).

4. The continuous welding production line for grid-type arch frames according to claim 1, characterized in that, The adjustment mechanism includes a servo motor (20), a main gear (21), a first side gear (22), a connecting gear (23), a second side gear (24), and two support rods (25). The servo motor (20) is fixedly installed in the rotating cavity. The main gear (21) is fixedly installed at the output end of the servo motor (20). The first side gear (22) and the connecting gear (23) mesh with the main gear (21) respectively. The second side gear (24) meshes with the other side of the connecting gear (23). The two support rods (25) are fixedly installed on the top of the first side gear (22) and the second side gear (24) respectively. The support rods (25) pass through the top of the rotating cavity and are fixedly connected to the bottom of the swing plate (9).

5. The continuous welding production line for grid-type arch frames according to claim 1, characterized in that, The center rod (13) is rotatably connected to a fixed ring (26), and a telescopic plate (27) is fixedly connected to the side wall of the fixed ring (26). The other end of the telescopic plate (27) is rotatably connected to the bottom of the connecting button (15).

6. The continuous welding production line for grid-type arch frames according to claim 1, characterized in that, The shape of the flip plate (18) is semi-circular, and the arc-shaped end of the flip plate (18) abuts against the side wall of the butterfly tendon (6).

7. The continuous welding production line for grid-type arch frames according to claim 6, characterized in that, The fixing mechanism includes a dual-axis motor (28), a drive rod (29), a drive bevel gear (30), a retainer (31), a bottom bevel gear (32), an inner rod (33), a top bevel gear (34), an outer rod (35), a top rod (36), and a side rod (37). The dual-axis motor (28) is fixedly installed in the working chamber. The drive rod (29) is fixedly installed at the output end of the dual-axis motor (28). The retainer (31) is fixedly installed inside the working chamber. The retainer (31) is a U-shaped frame with its opening facing away from the dual-axis motor (28). The drive rod (29) passes through the side wall of the retainer (31) and is fixedly connected to the side wall of the drive bevel gear (30). The bottom bevel gear (32) and the top bevel gear (34) are... All are rotatably connected to the side wall of the retainer (31). The bottom bevel gear (32) and the top bevel gear (34) also mesh with the drive bevel gear (30). The inner rod (33) is fixedly installed on the top of the bottom bevel gear (32). The outer rod (35) is fixedly installed on the top of the top bevel gear (34). The outer rod (35) has a through hole (38) inside. The inner rod (33) passes through the through hole (38). The top rod (36) is fixedly installed on the top of the inner rod (33). The side wall of the top rod (36) is fixedly connected to the side wall of one of the flip plates (18). The side rod (37) is fixedly installed on the side wall of the outer rod (35). The side wall of the side rod (37) is fixedly connected to the side wall of the other flip plate (18).

8. The continuous welding production line for grid-type arch frames according to claim 7, characterized in that, The outer rod (35) is rotatably connected to a rotating ring (39) on its side wall. The rotating ring (39) is fixedly connected to a supplementary rod (40) on its side wall. The side wall of the supplementary rod (40) is fixedly connected to the side wall of the flip plate (18) corresponding to the top rod (36).

9. The continuous welding production line for grid-type arch frames according to claim 8, characterized in that, Both of the flip-up plates (18) have placement slots (41) on their side walls. The positions of the placement slots (41) correspond to the positions of the top rod (36), the side rod (37), and the supplementary rod (40).

10. The continuous welding production line for grid-type arch frames according to claim 1, characterized in that, The support block (17) has two side walls fixedly provided with limiting plates (42), and the two side walls of the limiting plates (42) abut against the two side walls of the butterfly tendons (6), and the top of the limiting plates (42) is arc-shaped.

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