Arch bending production line for tunnel steel arch

Abstract

The invention belongs to the technical field of camber arch production lines, and particularly relates to a camber arch production line for a tunnel steel arch frame. According to the technical scheme, the arch bending production line for the tunnel steel arch frame comprises a feeding end cutting conveying unit, an uninterrupted continuous welding centering mechanism, a cold bending machine unit, a multi-angle sawing machine, a discharging roller unit, a gantry discharging gripper, an end plate welding unit and a discharging unit which are sequentially arranged. A continuous welding ground rail unit is arranged between the feeding end cutting conveying unit and the cold bending machine unit, a continuous welding tackle system is arranged at the bottom of the uninterrupted continuous welding centering mechanism, and the continuous welding tackle system is arranged on the continuous welding ground rail unit. According to the arch bending production line for the tunnel steel arch frame, continuous welding is completed during feeding and arch bending, and uninterrupted continuous production is formed.

Description

Technical Field

[0001] The invention belongs to the technical field of arch bending production lines, and in particular relates to an arch bending production line for tunnel steel arch frames. Background Art

[0002] At present, the loading process of the tunnel steel arch frame bending production line requires sawing the rough materials at both ends to ensure the quality of the subsequent welding seams. Currently, there is only one end cutting sawing machine in the loading and end cutting and conveying process, which cannot meet the production rhythm requirements.

[0003] In the continued welding process, the continued welding centering mechanism is a fixed position structure. When two profiles are extended for continued welding, the preceding loading, end cutting and subsequent cold bending machines cannot continuously bend the profiles to achieve continuous production.

[0004] At present, the cutting process after the arch forming behind the cold bending machine adopts a robot with a circular saw to cut. During the cutting process, there is a lot of splashing, high temperature, large cross-section burrs, and oxide scale produced at high temperature. In addition, the robot carrying the circular saw occupies a large space and has low cutting efficiency, which is not conducive to production efficiency and the guarantee of subsequent production quality.

[0005] The post-arch cutting process currently uses a large steel platform and a cantilever discharge grabber to discharge the steel platform. There are three shortcomings: first, the steel platform is large in size, which is not conducive to disassembly and transportation; second, the cantilever discharge grabber needs to be supported on the steel platform, and long-term work will damage the flatness of the steel platform, affecting the normal operation and service life of the cantilever grabber; third, the cantilever grabber's moving rail is located outside the discharge steel platform, which occupies a large area and has high construction costs.

[0006] Before the end plate welding process, the cost of using conventional large gear rings and gear drives is high. When welding the end plates, a set of welding robots is used to weld the end plates, and the welding speed cannot meet the cycle time of the entire line.

[0007] In the unloading process, the original unloading machine uses a winch with a clamp to grab the arch profiles completed in the end plate welding process. The profiles are easy to fall during the grabbing process and are easy to fall during the movement, which poses a safety hazard. When placing, it is also necessary to grab the column and walk along the track to the outside of the material support frame, which occupies a large area and increases the cost of equipment investment in the factory. Summary of the Invention

[0008] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a bending production line for tunnel steel arch frames, which can complete continuous welding while feeding and bending, thereby forming uninterrupted continuous production.

[0009] The technical solution adopted in the present invention is: A bending production line for tunnel steel arch frames comprises a loading and end cutting conveying unit, an uninterrupted continuous welding and centering mechanism, a cold bending machine unit, a multi-angle sawing machine, a discharge roller unit, a gantry discharge gripper, an end plate welding unit and a discharge unit which are arranged in sequence; a continuous welding ground rail unit is arranged between the loading and end cutting conveying unit and the cold bending machine unit, a continuous welding pulley system is arranged at the bottom of the uninterrupted continuous welding and centering mechanism, and the continuous welding pulley system is arranged on the continuous welding ground rail unit.

[0010] The present invention uses a loading and end cutting conveying unit, an uninterrupted welding and centering mechanism, a cold bending machine unit, a multi-angle sawing machine, a discharge roller unit, a gantry discharge gripper, an end plate welding unit and a discharge unit to sequentially perform loading and end cutting, continuous welding, bending, sawing, discharge, gripping, end plate welding and discharge on the profile.

[0011] The continuous welding pulley system of the present invention can drive the non-interrupted continuous welding centering mechanism to move in the continuous welding ground rail unit, so that when the cold bending machine unit bends the front end of the profile, the continuous welding pulley system can drive the non-interrupted continuous welding centering mechanism to move with the profile. The non-interrupted continuous welding centering mechanism always aligns with and clamps the joints of the two sections of the profile, and welds the joints of the two sections of the profile so that the welded profile reaches the required length. The present invention adopts the continuous welding ground rail unit to carry the non-interrupted continuous welding centering mechanism, and completes continuous welding while feeding and bending, forming uninterrupted continuous production, which solves the problem that the feeding and bending in the continuous welding process need to wait until the continuous welding is completed before continuing.

[0012] As a preferred embodiment of the present invention, the loading end cutting and conveying unit includes a first end cutting sawing machine, a first unpowered roller conveyor, a first loader, a first powered conveyor, a second loader, a second unpowered roller conveyor, a second end cutting sawing machine and a second powered conveyor arranged in sequence; a storage rack is provided on one side of the first powered conveyor, and a slag sweeper assembly is installed on the end of the second powered conveyor close to the second end cutting sawing machine.

[0013] The first loader grabs the profiles from the storage rack and places them on the first unpowered roller conveyor. The rear end of the profile extends to the first end-cutting saw, which is clamped by the first powered conveyor, and the first end-cutting saw cuts the front end of the profile. The profile is then conveyed to the second unpowered roller conveyor via the first powered conveyor. The front end of the profile extends to the second end-cutting saw, which is clamped by the first powered conveyor, and the second end-cutting saw cuts the front end of the profile. Finally, the second powered conveyor conveys the profiles, with both ends cut, to the non-stop welding and centering mechanism. During the conveying process, the slag sweeper assembly sweeps the slag from the profiles. The loading and end-cutting conveying unit uses a double sawing machine to saw the rough material at both ends of the profile, ensuring the quality of the subsequent welds. This also solves the problem of the existing tunnel steel arch bending production line, where the loading process of the profile in the loading process uses only one end-cutting saw, which cannot meet the end-cutting rhythm required for continuous production.

[0014] As a preferred solution of the present invention, the uninterrupted welding centering mechanism includes a robotic automatic welding system and two positioning and clamping components, and the robotic automatic welding system is located between the two positioning and clamping components.

[0015] Two positioning and clamping assemblies clamp the two sections of the profile, joining their ends. Two robotic automatic welding systems weld the joints between the two sections. Since the cold bending machine unit is bending the profile, the profile is constantly moving. The continuous welding centering mechanism, driven by the continuous welding pulley system, moves along the continuous welding track unit, ensuring that bending and continuous welding can proceed simultaneously, eliminating waiting time.

[0016] As a preferred embodiment of the present invention, the cold bending machine unit includes a cold bending machine base, on which an active roller assembly and two driven roller assemblies are installed. The two driven roller assemblies are arranged on both sides of the active roller assembly. The arched profile is bent under the joint action of the active roller assembly and the two driven roller groups.

[0017] As a preferred solution of the present invention, the multi-angle sawing machine includes a sawing machine ground rail unit, the output end of the sawing machine ground rail unit is installed with a rotary unit, and the output end of the rotary unit is installed with a sawing unit for cutting the profile in a direction perpendicular to the profile.

[0018] The swivel unit adjusts the angle of the saw unit, aligning the cutting direction with the curved profile, ensuring accurate cutting. Due to the varying curvatures of curved profiles, profiles of varying curvatures approaching from the same direction will be positioned differently relative to the saw unit. Adjusting the horizontal position of the saw unit using the saw's floor rail unit aligns the cutting area of ​​the saw unit with the section to be cut, ensuring accurate cutting of curved profiles of varying curvatures.

[0019] As a preferred embodiment of the present invention, the sawing unit includes a sawing support frame installed on the output end of the rotary unit, a clamping mechanism for clamping the profile is installed on the sawing support frame, a sawing lifting cylinder is also installed on the sawing support frame, a sawing mounting plate is installed on the piston rod of the sawing lifting cylinder, a sawing driving mechanism and a saw blade mechanism are installed on the sawing mounting plate, and the output end of the sawing driving mechanism is connected to the output end of the saw blade mechanism.

[0020] When a curved profile is fed in, the clamping mechanism compresses the profile, and the saw lift cylinder lowers the mounting plate, allowing the saw blade to contact the profile. The saw drive mechanism activates the saw blade, slowly lowering the mounting plate, and the saw blade begins to cut the profile. When the cut is complete, the clamping mechanism rises, and the saw lift cylinder raises the mounting plate, ensuring that the cut profile can be removed.

[0021] As a preferred embodiment of the present invention, the discharge roller unit includes a longitudinal roller foot assembly, a positioning assembly and a transverse roller foot assembly. The longitudinal roller foot assembly and the transverse roller foot assembly are arranged adjacent to each other, and the positioning assembly is installed in cooperation with the gantry discharge gripper.

[0022] After being cut by the multi-angle saw, the profile slides onto the longitudinal and transverse roller support leg assemblies. The gantry discharge gripper grabs the profile onto the positioning assembly, facilitating the end plate welding unit to accurately grab the profile and weld the end plates. The present invention utilizes a discharge roller unit and a gantry discharge gripper, avoiding the bulky steel platform that makes disassembly and transportation difficult. It also avoids the need for a cantilever discharge gripper to support the steel platform, which would damage the flatness of the steel platform over time and affect the normal operation and service life of the cantilever gripper. It also avoids the problem of the cantilever gripper moving rail being located outside the discharge steel platform, resulting in a large footprint and high construction costs.

[0023] As a preferred solution of the present invention, the gantry discharging gripper includes a discharging gripper ground rail assembly, a walking box assembly is provided on the discharging gripper ground rail assembly, and a column assembly is installed on the walking box assembly; the gantry discharging gripper also includes a beam assembly, the column assemblies on both sides are connected to the beam assembly, and a clamping claw assembly is slidably installed on the beam assembly.

[0024] As a preferred embodiment of the present invention, the end plate welding unit includes a flip slide assembly, a first end plate welding ground rail assembly and a second end plate welding ground rail assembly arranged in parallel, the first end plate welding ground rail assembly and the second end plate welding ground rail assembly are both perpendicular to the flip slide assembly, two flip machines are provided on the flip slide assembly, the first end plate welding ground rail assembly is provided with a first end plate welding machine pulley, the first end plate welding machine pulley is installed with an end plate grabbing robot assembly and a primary welding robot assembly, the second end plate welding machine pulley is installed with a secondary welding robot assembly, and the first end plate welding machine pulley and the second end plate welding machine pulley are both fixed with a welding support frame.

[0025] After a flipping machine near the positioning assembly grabs the profile on the positioning assembly, the flipping slide assembly moves to the position corresponding to the first end plate welding ground rail assembly, and then flips the curved profile to a vertical position, with both ends of the profile overlapping the welding support frame. After the end plate grabbing robot assembly grabs the end plate, it splices the end plate with the end of the profile, and the primary welding robot assembly welds one side of the seam. The previous flipping machine flips the profile to a horizontal position and then exits. Another flipping machine grabs the profile to a position corresponding to the second end plate welding ground rail assembly, and then flips the curved profile to a vertical position, with both ends of the profile overlapping the welding support frame. The secondary welding robot assembly welds the other side of the seam between the profile and the end plate. After welding is completed, the double-clamp flipping frame flips the formed workpiece to a horizontal position and exits, and the unloading unit then delivers the formed workpiece.

[0026] The present invention adopts a turning machine in the end plate welding process to solve the problem of high equipment cost in this process, and adopts two sets of end plate welding robot systems to weld the two sides of the profile and the end plate joint respectively, thereby solving the problem of insufficient end plate welding rhythm and ensuring continuous production.

[0027] As a preferred solution of the present invention, the unloading unit includes a material picking device and two sliding adjustable material racks arranged on both sides of the material picking device; the material picking device includes a material picking ground rail, a mobile rack is provided on the material picking ground rail, a mobile drive mechanism is installed on the mobile rack, the output end of the mobile drive mechanism is overlapped on the material picking ground rail, a lifting electric cylinder is installed on the mobile rack, and a lifting material picking claw with an opening facing upward is connected to the piston rod of the lifting electric cylinder.

[0028] The present invention adopts the ground rail to directly carry the material-taking device to be lifted to take the material during the end plate welding process, and transports it to the sliding adjustable material rack at a low position, thereby solving the safety hazard of the profile easily falling during the material-taking process. The external rail is reduced by structural changes, thereby reducing the cost investment in factory construction.

[0029] The mobile drive mechanism moves the lifting claw to the position where the profile is to be removed. The lifting cylinder then raises the claw, allowing the profile to fall into the upward-facing lifting claw. After the mobile drive mechanism moves the profile to the sliding adjustable rack, the lifting cylinder lowers, automatically placing the profile onto the sliding adjustable rack. The lifting claw's opening always faces upward, preventing the profile from falling through the claw.

[0030] The beneficial effects of the present invention are: The continuous welding pulley system of the present invention can drive the non-interrupted continuous welding centering mechanism to move in the continuous welding ground rail unit, so that when the cold bending machine unit bends the front end of the profile, the continuous welding pulley system can drive the non-interrupted continuous welding centering mechanism to move with the profile. The non-interrupted continuous welding centering mechanism always aligns with and clamps the joints of the two sections of the profile, and welds the joints of the two sections of the profile so that the welded profile reaches the required length. The present invention adopts the continuous welding ground rail unit to carry the non-interrupted continuous welding centering mechanism, and completes continuous welding while feeding and bending, forming uninterrupted continuous production, which solves the problem that the feeding and bending in the continuous welding process need to wait until the continuous welding is completed before continuing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a structural diagram of the feeding end cutting and conveying unit; Figure 3 It is a structural diagram of the uninterrupted welding centering mechanism; Figure 4 This is a top view of the uninterrupted welding centering mechanism; Figure 5 It is a structural diagram of the cold bending machine unit; Figure 6 It is a structural diagram of a multi-angle sawing machine; Figure 7 It is a structural schematic diagram of the sawing unit; Figure 8 It is a structural diagram of the discharge roller unit; Figure 9 This is a structural diagram of the gantry arrangement gripper; Figure 10 It is a structural diagram of the gripper assembly; Figure 11 It is a structural diagram of the end plate welding unit; Figure 12 It is a top view of the end plate welding unit; Figure 13 It is a structural diagram of the blanking unit.

[0032] Figure: 1 - feeding end cutting and conveying unit; 2 - continuous welding and centering mechanism; 3 - cold bending machine unit; 4 - multi-angle sawing machine; 5 - discharge roller unit; 6 - gantry discharge gripper; 7 - end plate welding unit; 8 - unloading unit; 11 - first end cutting sawing machine; 12 - first non-powered roller conveyor; 13 - first loader; 14 - first powered conveyor; 15 - second loader; 16 - second non-powered roller conveyor; 17 - second end cutting sawing machine; 18 - second powered conveyor ;21-Continuous welding rail unit;22-Continuous welding pulley system;23-Robot automatic welding system;24-Positioning and clamping assembly;31-Cold bending machine base;32-Active roller assembly;33-Driven roller assembly;41-Sawing machine rail unit;42-Slewing unit;43-Sawing unit;51-Longitudinal roller support foot assembly;52-Positioning assembly;53-Transverse roller support foot assembly;61-Discharging gripper rail assembly;62-Travel box assembly;63-Column assembly;64-Beam Assembly; 65-gripper assembly; 71-flip rail assembly; 72-first end plate welding ground rail assembly; 73-second end plate welding ground rail assembly; 74-flipper; 75-first end plate welding machine pulley; 76-end plate grabbing robot assembly; 77-primary welding robot assembly; 78-secondary welding robot assembly; 79-welding support frame; 81-retrieving device; 82-sliding adjustable material rack; 141-storage rack; 181-slag sweeper assembly; 431-sawing support frame; 432-Clamping mechanism; 433-Sawing lifting cylinder; 434-Sawing mounting plate; 435-Sawing drive mechanism; 436-Saw blade mechanism; 651-Sliding mechanism; 652-Gripper lifting cylinder; 653-Gripper support plate; 654-Fixed gripper; 655-Gripper clamping cylinder; 656-Moveable gripper; 811-Material retrieving rail; 812-Moving rack; 813-Lifting electric cylinder; 814-Lifting gripper; 821-Material rack rail; 822-Profile placement rack. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features therein may be combined with each other unless there is a conflict.

[0035] like Figure 1 As shown, the arch bending production line for tunnel steel arch frames of this embodiment includes a loading and end cutting conveying unit 1, an uninterrupted welding and centering mechanism 2, a cold bending machine unit 3, a multi-angle sawing machine 4, a discharge roller unit 5, a gantry discharge gripper 6, an end plate welding unit 7 and a discharge unit 8, which are arranged in sequence; a continuous welding ground rail unit 21 is arranged between the loading and end cutting conveying unit 1 and the cold bending machine unit 3, and a continuous welding pulley system 22 is arranged at the bottom of the uninterrupted welding and centering mechanism 2, and the continuous welding pulley system 22 is arranged on the continuous welding ground rail unit 21.

[0036] The present invention uses a loading and end cutting conveying unit 1, an uninterrupted welding and centering mechanism 2, a cold bending machine unit 3, a multi-angle sawing machine 4, a discharge roller unit 5, a gantry discharge gripper 6, an end plate welding unit 7 and a discharge unit 8 to sequentially perform loading and end cutting, continuous welding, bending, sawing, discharge, gripping, end plate welding and discharge on the profile.

[0037] The continuous welding pulley system 22 of the present invention can drive the non-interrupted continuous welding centering mechanism 2 to move in the continuous welding ground rail unit 21, so that when the cold bending machine unit 3 bends the front end of the profile, the continuous welding pulley system 22 can drive the non-interrupted continuous welding centering mechanism 2 to move with the profile. The non-interrupted continuous welding centering mechanism 2 always aligns with and clamps the joint of the two sections of the profile, and welds the joint of the two sections of the profile so that the welded profile reaches the required length. The present invention adopts the continuous welding ground rail unit 21 to carry the non-interrupted continuous welding centering mechanism 2, and completes continuous welding while feeding and bending, forming uninterrupted continuous production, which solves the problem that the feeding and bending in the continuous welding process need to wait until the continuous welding is completed before continuing.

[0038] Specifically, if Figure 2 As shown, the loading end cutting and conveying unit 1 includes a first end cutting saw bed 11, a first unpowered roller conveyor 12, a first loader 13, a first powered conveyor 14, a second loader 15, a second unpowered roller conveyor 16, a second end cutting saw bed 17 and a second powered conveyor 18 which are arranged in sequence; a storage rack 141 is provided on one side of the first powered conveyor 14, and a slag sweeper assembly 181 is installed on one end of the second powered conveyor 18 close to the second end cutting saw bed 17.

[0039] The first loader 13 grabs the profile from the storage rack 141 and places it on the first unpowered roller conveyor 12. The rear end of the profile extends to the first end-cutting saw 11, which is clamped by the first powered conveyor 14. The first end-cutting saw 11 then cuts the front end of the profile. The first powered conveyor 14 then conveys the profile to the second unpowered roller conveyor 16. The front end of the profile extends to the second end-cutting saw 17, which is clamped by the first powered conveyor 14. The second end-cutting saw 17 cuts the front end of the profile. Finally, the second powered conveyor 18 conveys the profile, which has had both ends cut, to the uninterrupted welding and centering mechanism 2. During the conveying process, the slag sweeper assembly 181 sweeps the slag from the profile. The loading and end-cutting conveying unit 1 uses a double sawing machine to saw the rough materials at both ends of the profile, ensuring the quality of the subsequent welding welds, and solving the problem that the existing tunnel steel arch frame bending arch production line only uses one end-cutting sawing machine to saw the rough materials at both ends of the profile in the loading process, which cannot meet the end-cutting rhythm during continuous production.

[0040] Specifically, if Figure 3 and Figure 4 As shown, the uninterrupted welding centering mechanism 2 includes a robotic automatic welding system 23 and two positioning and clamping assemblies 24 , and the robotic automatic welding system 23 is located between the two positioning and clamping assemblies 24 .

[0041] Two positioning clamping assemblies 24 clamp the two sections of the profile, joining their ends. Two robotic automatic welding systems 23 weld the joints between the two sections. Since the cold bending machine unit 3 is bending the profile, the profile is always in motion. The continuous welding centering mechanism 2 is driven by the continuous welding pulley system 22 and moves along the continuous welding rail unit 21, ensuring that bending and continuous welding can proceed simultaneously, eliminating waiting time.

[0042] Specifically, if Figure 5 As shown, the cold bending machine unit 3 includes a cold bending machine base 31, on which an active roller assembly 32 and two driven roller assemblies 33 are installed. The two driven roller assemblies 33 are arranged on both sides of the active roller assembly 32. The arched profile is bent under the joint action of the active roller assembly 32 and the two driven roller groups.

[0043] Specifically, if Figure 6 and Figure 7 As shown, the multi-angle sawing machine 4 includes a sawing machine rail unit 41, a rotary unit 42 is installed at the output end of the sawing machine rail unit 41, and a sawing unit 43 for cutting the profile in a direction perpendicular to the profile is installed at the output end of the rotary unit 42.

[0044] The swivel unit 42 adjusts the angle of the saw unit 43, aligning the cutting direction with the curved profile, ensuring accurate cutting. Because curved profiles have varying curvatures, profiles of varying curvatures approaching from the same direction will be positioned differently relative to the saw unit 43. By adjusting the lateral position of the saw unit 43 via the sawing machine's floor rail unit 41, the cutting area of ​​the saw unit 43 can be aligned with the area to be cut, ensuring accurate cutting of curved profiles of varying curvatures.

[0045] Among them, the sawing unit 43 includes a sawing support frame 431 installed on the output end of the rotary unit 42, and a pressing mechanism 432 for pressing the profile is installed on the sawing support frame 431. A sawing lifting cylinder 433 is also installed on the sawing support frame 431, and a sawing mounting plate 434 is installed on the piston rod of the sawing lifting cylinder 433. A sawing driving mechanism 435 and a saw blade mechanism 436 are installed on the sawing mounting plate 434, and the output end of the sawing driving mechanism 435 is connected to the output end of the saw blade mechanism 436.

[0046] When a curved profile is fed in, the clamping mechanism 432 compresses the profile, and the saw lift cylinder 433 lowers the mounting plate, allowing the saw blade mechanism 436 to contact the profile. The saw drive mechanism 435 activates the saw blade mechanism 436, which then slowly lowers the mounting plate, allowing the saw blade mechanism 436 to cut the profile. When the sawing is complete, the clamping mechanism 432 rises, and the saw lift cylinder 433 raises the mounting plate, ensuring that the cut profile can be removed.

[0047] The saw blade mechanism 436 includes a driving wheel and a driven wheel rotatably mounted on a mounting plate. The output end of the sawing drive mechanism 435 is connected to the rotating shaft of the driving wheel. A band saw blade is wound between the driving wheel and the driven wheel. Two guide structures are installed on the mounting plate for guiding one side of the band saw blade to a vertical horizontal plane.

[0048] The sawing drive mechanism 435 rotates the driving wheel, causing the band saw blade to continuously rotate between the driving and driven wheels. Two guide mechanisms align the underside of the band saw blade with the vertical and horizontal guide structures, ensuring that the band saw blade accurately cuts the workpiece. The band saw blade rests against the driving and driven wheels, ensuring continuous rotation.

[0049] Specifically, if Figure 8 As shown, the discharge roller unit 5 includes a longitudinal roller foot assembly 51, a positioning assembly 52 and a transverse roller foot assembly 53. The longitudinal roller foot assembly 51 and the transverse roller foot assembly 53 are arranged adjacent to each other, and the positioning assembly 52 is installed in cooperation with the gantry discharge gripper 6.

[0050] After being cut by the multi-angle saw 4, the profile slides onto the longitudinal roller support leg assembly 51 and the transverse roller support leg assembly 53. The gantry discharge gripper 6 grabs the profile and places it on the positioning assembly 52, facilitating the end plate welding unit 7 to accurately grab the profile and weld the end plates. The present invention utilizes the discharge roller unit 5 and the gantry discharge gripper 6 to avoid the bulky steel platform that makes disassembly and transportation difficult. It also avoids the need for a cantilever discharge gripper to support the steel platform, which would damage the flatness of the steel platform over time and affect the normal operation and service life of the cantilever gripper. It also avoids the problem of the cantilever gripper moving rail being located outside the discharge steel platform, which occupies a large area and increases construction costs.

[0051] Specifically, if Figure 9 and Figure 10 As shown, the gantry discharging gripper 6 includes a discharging gripper ground rail assembly 61, a walking box assembly 62 is provided on the discharging gripper ground rail assembly 61, and a column assembly 63 is installed on the walking box assembly 62; the gantry discharging gripper 6 also includes a beam assembly 64, the column assemblies 63 on both sides are connected to the beam assembly 64, and a clamping jaw assembly 65 is slidably installed on the beam assembly 64.

[0052] like Figure 10 As shown, the clamping jaw assembly 65 includes a sliding mechanism 651, which is sleeved on the crossbeam assembly 64. The sliding mechanism 651 is equipped with a transverse sliding drive mechanism. Two clamping jaw lifting cylinders 652 are installed on the sliding mechanism 651. The piston rods of the clamping jaw lifting cylinders 652 are connected to the clamping jaw support plate 653. The clamping jaw support plate 653 is equipped with a fixed clamping jaw 654 and a clamping jaw cylinder 655. The piston rod of the clamping jaw cylinder 655 is connected to the movable clamping jaw 656. When the fixed clamping jaw 654 and the movable clamping jaw 656 are close together, they clamp the profile.

[0053] Specifically, if Figure 11 and Figure 12 As shown, the end plate welding unit 7 includes a flip slide assembly 71, a first end plate welding ground rail assembly 72 and a second end plate welding ground rail assembly 73 arranged in parallel, the first end plate welding ground rail assembly 72 and the second end plate welding ground rail assembly 73 are both perpendicular to the flip slide assembly 71, two flip machines 74 are provided on the flip slide assembly 71, the first end plate welding ground rail assembly 72 is provided with a first end plate welding machine pulley 75, the first end plate welding machine pulley 75 is installed with an end plate grasping robot assembly 76 and a primary welding robot assembly 77, the second end plate welding machine pulley is installed with a secondary welding robot assembly 78, and the first end plate welding machine pulley 75 and the second end plate welding machine pulley are both fixed with a welding support frame 79.

[0054] After a turning machine 74 near the positioning assembly 52 grabs the profile on the positioning assembly 52, the turning slide assembly 71 moves to the position corresponding to the first end plate welding rail assembly 72, and then flips the curved profile to a vertical position, with both ends of the profile overlapping the welding support frame 79. The end plate grabbing robot assembly 76 grabs the end plate and splices the end plate with the end of the profile, and the primary welding robot assembly 77 welds one side of the seam. The previous turning machine 74 flips the profile to a horizontal position and then exits. Another turning machine 74 grabs the profile to a position corresponding to the second end plate welding rail assembly 73, and then flips the curved profile to a vertical position, with both ends of the profile overlapping the welding support frame 79. The secondary welding robot assembly 78 welds the other side of the seam between the profile and the end plate. After welding is completed, the double-clamp turning frame flips the formed workpiece to a horizontal position and exits, and the unloading unit 8 then sends the formed workpiece out.

[0055] The present invention adopts a turning machine 74 in the end plate welding process to solve the problem of high equipment cost of this process, and adopts two sets of end plate welding robot systems to weld the two sides of the profile and the end plate joint respectively, thereby solving the problem of insufficient end plate welding rhythm and ensuring continuous production.

[0056] Specifically, if Figure 13 As shown, the unloading unit 8 includes a feeding device 81 and two sliding adjustable material racks 82 arranged on both sides of the feeding device 81; the feeding device 81 includes a feeding ground rail 811, a movable rack 812 is provided on the feeding ground rail 811, a movable drive mechanism is installed on the movable rack 812, the output end of the movable drive mechanism is overlapped on the feeding ground rail 811, a lifting electric cylinder 813 is installed on the movable rack 812, and a lifting feeding claw 814 with an opening facing upward is connected to the piston rod of the lifting electric cylinder 813.

[0057] The present invention uses a ground rail to directly carry the material-taking device 81 to be lifted to take materials during the end plate welding process, and transports them to the sliding adjustable material rack 82 at a low position, thereby solving the safety hazard of profiles easily falling during the material-taking process. The external rail is reduced by structural changes, thereby reducing the cost investment in factory construction.

[0058] The mobile drive mechanism drives the lifting claw 814 to the position where the profile is to be removed. The lifting cylinder 813 then drives the lifting claw 814 upward, allowing the profile to fall into the lifting claw 814, which has an upward-facing opening. After the mobile drive mechanism moves the profile to the position of the sliding adjustable material rack 82, the lifting cylinder 813 lowers, and the profile is automatically placed on the sliding adjustable material rack 82. The opening of the lifting claw 814 always faces upward, preventing the profile from falling through the lifting claw 814.

[0059] The sliding adjustable material rack 82 includes a material rack ground rail 821, and a profile placement rack 822 is overlapped on the material rack ground rail 821. The profile placement rack 822 can move on the material rack ground rail 821 to adjust the distance between the profile placement racks 822 on both sides to adapt to profiles of different lengths or curvatures.

[0060] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that falls within the scope defined by the claims of the present invention falls within the scope of protection of the present invention.

Claims

1. A bending production line for tunnel steel arch frames, characterized by: The invention comprises a feeding end cutting conveying unit (1), an uninterrupted continuous welding centering mechanism (2), a cold bending machine unit (3), a multi-angle sawing machine (4), a discharge roller unit (5), a gantry discharge gripper (6), an end plate welding unit (7) and a discharge unit (8) which are arranged in sequence; a continuous welding ground rail unit (21) is arranged between the feeding end cutting conveying unit (1) and the cold bending machine unit (3); a continuous welding pulley system (22) is arranged at the bottom of the uninterrupted continuous welding centering mechanism (2); and the continuous welding pulley system (22) is arranged on the continuous welding ground rail unit (21).

2. The arch bending production line for tunnel steel arch frames according to claim 1, characterized in that: The loading end cutting and conveying unit (1) comprises a first end cutting sawing machine (11), a first unpowered roller conveyor (12), a first loader (13), a first powered conveyor (14), a second loader (15), a second unpowered roller conveyor (16), a second end cutting sawing machine (17) and a second powered conveyor (18) which are arranged in sequence; a material storage rack (141) is provided on one side of the first powered conveyor (14), and a slag sweeper assembly (181) is installed on one end of the second powered conveyor (18) close to the second end cutting sawing machine (17).

3. The arch bending production line for tunnel steel arch frames according to claim 1, characterized in that: The uninterrupted welding centering mechanism (2) comprises a robotic automatic welding system (23) and two positioning clamping assemblies (24), wherein the robotic automatic welding system (23) is located between the two positioning clamping assemblies (24).

4. The arch bending production line for tunnel steel arch frames according to claim 1, characterized in that: The cold bending machine unit (3) comprises a cold bending machine base (31), on which a driving roller assembly (32) and two driven roller assemblies (33) are mounted. The two driven roller assemblies (33) are arranged on both sides of the driving roller assembly (32). The arched profile is arched under the joint action of the driving roller assembly (32) and the two driven roller assemblies.

5. The arch bending production line for tunnel steel arch frame according to claim 1, characterized in that: The multi-angle sawing machine (4) comprises a sawing machine ground rail unit (41), a rotary unit (42) is installed at the output end of the sawing machine ground rail unit (41), and a sawing unit (43) for cutting the profile in a direction perpendicular to the profile is installed at the output end of the rotary unit (42).

6. The arch bending production line for tunnel steel arch frames according to claim 5, characterized in that: The sawing unit (43) comprises a sawing support frame (431) mounted on the output end of the rotary unit (42); a pressing mechanism (432) for pressing the profile is mounted on the sawing support frame (431); a sawing lifting cylinder (433) is also mounted on the sawing support frame (431); a sawing mounting plate (434) is mounted on the piston rod of the sawing lifting cylinder (433); a sawing drive mechanism (435) and a saw blade mechanism (436) are mounted on the sawing mounting plate (434); and the output end of the sawing drive mechanism (435) is connected to the output end of the saw blade mechanism (436).

7. The arch bending production line for tunnel steel arch frames according to claim 1, characterized in that: The discharge roller unit (5) comprises a longitudinal roller support foot assembly (51), a positioning assembly (52) and a transverse roller support foot assembly (53). The longitudinal roller support foot assembly (51) and the transverse roller support foot assembly (53) are arranged adjacent to each other, and the positioning assembly (52) is installed in conjunction with the gantry discharge gripper (6).

8. The arch bending production line for tunnel steel arch frames according to claim 1, characterized in that: The gantry discharging gripper (6) includes a discharging gripper ground rail assembly (61), a walking box assembly (62) is provided on the discharging gripper ground rail assembly (61), and a column assembly (63) is installed on the walking box assembly (62); the gantry discharging gripper (6) also includes a beam assembly (64), the column assemblies (63) on both sides are connected to the beam assembly (64), and a clamping claw assembly (65) is slidably installed on the beam assembly (64).

9. The arch bending production line for tunnel steel arch frames according to claim 1, characterized in that: The end plate welding unit (7) comprises a flip rail assembly (71), a first end plate welding ground rail assembly (72) and a second end plate welding ground rail assembly (73) arranged in parallel, the first end plate welding ground rail assembly (72) and the second end plate welding ground rail assembly (73) being perpendicular to the flip rail assembly (71), two flip machines (74) being arranged on the flip rail assembly (71), a first end plate welding machine pulley (75) being arranged on the first end plate welding ground rail assembly (72), an end plate grabbing robot assembly (76) and a primary welding robot assembly (77) being mounted on the first end plate welding machine pulley (75), a secondary welding robot assembly (78) being mounted on the second end plate welding machine pulley, and a welding support frame (79) being fixed on the first end plate welding machine pulley (75) and the second end plate welding machine pulley.

10. The arch bending production line for tunnel steel arch frame according to claim 1, characterized in that: The unloading unit (8) comprises a material taking device (81) and two sliding adjustable material racks (82) respectively arranged on both sides of the material taking device (81); the material taking device (81) comprises a material taking ground rail (811), a movable rack (812) is arranged on the material taking ground rail (811), a movable drive mechanism is installed on the movable rack (812), the output end of the movable drive mechanism is overlapped on the material taking ground rail (811), a lifting electric cylinder (813) is installed on the movable rack (812), and a lifting material taking claw (814) with an upward opening is connected to the piston rod of the lifting electric cylinder (813).

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