A u-ribbed plate unit production method and production line with roller conveying line

Abstract

This invention relates to the field of U-rib plate production technology, specifically to a method and production line for producing U-rib plate units equipped with a roller conveyor line. The method for producing U-rib plate units equipped with a roller conveyor line includes the following steps: S1, grinding the U-ribs and steel plates; S2, assembling the U-ribs and steel plates to form an integral structure; S3, welding the assembled integral structure; S4, treating the welding slag; S5, straightening the welded semi-finished product; S6, painting to obtain the finished product. The transfer between the above steps is completed using a lifting roller conveyor equipment. This invention eliminates reliance on lifting equipment, avoiding production line restrictions imposed by lifting equipment scheduling; it also eliminates the time spent on hooking and unhooking during lifting operations and waiting, shortening the process connection time and improving the production flow efficiency of U-rib plate units.

Description

Technical Field

[0001] This invention relates to the field of U-rib plate production technology, and more specifically, to a method and production line for producing U-rib plate units equipped with roller conveyors. Background Technology

[0002] In the traditional production process of steel bridge U-rib plate units, the main steps include grinding, assembly, welding, slag removal, straightening, and painting of steel plates and U-ribs. The transfer of materials (such as steel plates, U-ribs, and semi-finished plate units) between these steps has long relied heavily on large lifting equipment (such as overhead cranes). This transfer method has several significant drawbacks: First, the lifting process is cumbersome, requires specialized operators, and occupies lifting equipment for extended periods, thus hindering the overall production cycle. Second, the lifting process poses safety risks; workpiece swaying may cause collisions or personal injury. Third, the lifting positioning accuracy is relatively low, which is detrimental to the implementation of subsequent automated and intelligent welding and assembly processes. Finally, this discrete, manual lifting method hinders the continuous and automated upgrading of the production line. Summary of the Invention

[0003] The purpose of this invention is to provide a method and production line for producing U-rib plate units equipped with roller conveyors, which can solve the above-mentioned technical problems.

[0004] In a first aspect, the present invention provides a method for producing a U-rib plate unit equipped with a roller conveyor line, comprising the following steps: S1. Grind the U-ribs and steel plates; S2. Assemble the U-ribs and steel plates to form an integral structure; S3. Weld the assembled overall structure; S4. Remove the welding slag generated during welding. S5. Correct the semi-finished products after welding; S6. Painting process to obtain the finished product; The transfer between the above steps is all completed using lifting roller conveyor equipment.

[0005] In an optional implementation, before step S3, the welding method is determined first: If internal welding is required, the sample is first sent to the internal welding machine for internal welding, and then sent to the external welding machine for external welding. If internal welding is not required, the product is directly sent to an external welding machine for external welding. After the external welding is completed, proceed to step S4.

[0006] In an optional implementation, a transverse chain conveyor is used when conveying the material to the inner welding machine in step S3.

[0007] In an optional implementation, in step S2, after assembly, the assembly is positioned by spot welding before proceeding to step S3.

[0008] In an optional embodiment, the lifting roller conveying equipment includes multiple spliced ​​roller lifting platforms; The roller lifting platform includes a platform body, roller lifting components, support structure, and unified control unit; The roller lifting assembly is mounted on the platform body and forms a lifting and lowering cooperation with the platform body to carry and transport the workpiece. The support structure is installed on the platform body and connected to the roller lifting assembly to support the lifting action of the roller lifting assembly. The unified control unit establishes signal connections with the roller lifting assembly and the support structure to control the lifting and conveying actions of the roller lifting assembly and the support status of the support structure.

[0009] In an optional embodiment, the roller lifting assembly includes a rotating mechanism, a lifting mechanism, and a roller assembly; The roller assembly is mounted on the rotating mechanism, and the rotating mechanism is mounted on the lifting mechanism; The lifting mechanism includes a lifting power unit, a guide mechanism, a lifting base, and a lifting top plate; The rotating mechanism is disposed on the lifting top plate; The lifting power device is installed on the lifting base and is connected to the lower side of the lifting top plate, which can provide power and support for the lifting of the lifting top plate; The guide mechanism connects the lifting top plate and the lifting base.

[0010] In an optional embodiment, the rotating mechanism includes a rotating base, an arc-shaped rack, a drive gear, and a rotating power device; The rotary power device is fixedly mounted on the lifting top plate; The rotating base is rotatably mounted on the lifting top plate, and the arc-shaped rack is fixedly mounted on the side wall of the rotating base; The rotary power device is connected to the drive gear and can drive the drive gear to rotate; The drive gear meshes with the arc-shaped rack.

[0011] In an optional embodiment, the roller assembly includes a roller base, a roller body, a roller shaft, and a roller power unit. The roller base is mounted on the rotating base; The roller body is rotatably connected to the roller base via the roller shaft; The roller power unit is mounted on the roller base and connected to the roller shaft or the roller body. The roller power unit can drive the roller body to rotate.

[0012] In optional embodiments, a limiting device is also included; The limiting device includes a limiting block; The limiting block is disposed on the lifting top plate and located at both ends of the rotation trajectory of the arc-shaped rack, which can limit the maximum rotation angle at both ends of the arc-shaped rack.

[0013] Secondly, the present invention provides a U-rib plate unit production line, using the production method described in any of the foregoing embodiments.

[0014] The beneficial effects of this invention are: The lifting roller conveyor system enables the conveying and transfer of materials between grinding, assembly, welding slag removal, and straightening processes. This eliminates the reliance on lifting equipment, avoids the occupation of lifting equipment resources, and prevents the production line from being restricted by lifting equipment scheduling, thus greatly improving the overall equipment utilization rate. It also eliminates the time spent on hooking and unhooking during lifting and hoisting, shortens the process connection time, and improves the production flow efficiency of the U-rib plate unit. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A flowchart of a method for producing a U-rib plate unit equipped with a roller conveyor line provided in an embodiment of the present invention; Figure 2 A layout diagram of a U-rib plate unit production line equipped with a roller conveyor line provided in an embodiment of the present invention; Figure 3 A schematic diagram of the lifting roller conveying system of the U-rib plate unit production line provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the roller lifting platform of the U-rib plate unit production line provided in an embodiment of the present invention; Figure 5 This is a front view of the roller lifting assembly of the U-rib plate unit production line provided in an embodiment of the present invention; Figure 6 A three-dimensional structural schematic diagram of the roller lifting assembly of the U-rib plate unit production line provided in an embodiment of the present invention; Figure 7 A schematic diagram of the support structure of the U-rib plate unit production line provided in an embodiment of the present invention; Figure 8 This is a three-dimensional structural diagram of the support structure of the U-rib plate unit production line provided in an embodiment of the present invention.

[0017] Icons: 1-Grinding machine; 2-Lifting roller conveyor; 3-Transverse conveyor; 4-Assembly machine; 5-Outer welding machine; 6-Inner welding machine; 7-Slag dumping machine; 8-Straightening machine; 9-Roller lifting platform; 10-Platform body; 11-Roller lifting assembly; 12-Roller assembly; 13-Rotating mechanism; 14-Lifting mechanism; 15-Roller body; 16-Roller shaft; 17-Roller base; 18-Roller power unit; 19-Rotating base; 20-Lifting top plate; 21-Arc rack; 22-Drive gear; 23-Rotating power unit; 24-Limit block; 25-Proximity switch; 26-Lifting power unit; 27-Suspension support plate; 28-Connecting column. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] The following is combined with Figures 1-8 The following describes some embodiments of the present invention in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] In a first aspect, the present invention provides a method for producing a U-rib plate unit equipped with a roller conveyor line, comprising the following steps: S1. Grind the U-ribs and steel plates; S2. Assemble the U-ribs and steel plates to form an integral structure; S3. Weld the assembled overall structure; S4. Remove the welding slag generated during welding. S5. Correct the semi-finished products after welding; S6. Painting process to obtain the finished product; The transfer between the above steps is completed using lifting roller conveyor equipment 2.

[0026] After the steel plates and U-ribs are unloaded onto their respective grinding equipment, they are fixed by rollers and fixing devices, and the grinding equipment starts to operate. After grinding, they are transported to the assembly machine for assembly via roller conveyor equipment. After welding is completed, the material is transported to the slag removal machine 7 to clean the welding slag; finally, it is transported to the straightening machine 8 for straightening and verification, and then it can be painted and shipped out.

[0027] In an optional implementation, before step S3, the welding method is determined first: If internal welding is required, the sample is first sent to the internal welding machine 6 for internal welding, and then sent to the external welding machine 5 for external welding. If internal welding is not required, it can be directly conveyed to external welding machine 5 for external welding; After the external welding is completed, proceed to step S4.

[0028] Starting from the stacking area, the steel plate first enters the laser panel grinding and scribing integrated machine. After adjustment by the roller (longitudinal) and hydraulic (longitudinal) devices, grinding and scribing begin, and it is then conveyed by roller conveyor to assembly machine 4. Simultaneously, the U-rib, after grinding, enters the roller conveyor area of ​​the lifting roller conveyor device 2 from the U-rib stacking area, and is then conveyed by the lifting roller conveyor device 2 to assembly machine 4. Assembly machine 4 hydraulically presses the U-rib to the base plate, and then fixes them by spot welding. The lifting roller conveyor device 2 at assembly machine 4 can move within a small range within the frame of assembly machine 4. After assembly, it is determined whether internal welding is required based on the process requirements of this U-rib plate unit project.

[0029] When internal welding is required, the lifting roller conveyor 2 on assembly machine 4 transports the assembled U-rib plate unit to the top of the conveyor roller table. After reaching the area of ​​chain transverse conveyor 3, chain transverse conveyor 3 rises above the conveyor roller table and then begins to move laterally, transporting it to the top of a production line below. Then, it is transported to the internal welding area via roller table. The internal welding stand is equipped with a lifting roller conveyor device, capable of transporting steel and adjusting its position. After internal welding is completed, it is directly transported to the external welding area via rollers. The external welding tilting stand is also equipped with a lifting roller conveyor 2. After external welding is completed, it is transported to the slag dumping machine 7 by the lifting roller conveyor 2. The slag dumping machine 7 is also equipped with a lifting roller device. After the slag dumping machine 7 cleans the internal and external welding slag of the U-rib plate unit, it is transported to the straightening machine 8 via a transport device. The bottom of the straightening machine 8 is a roller. After straightening is completed, the process is finished.

[0030] If internal welding is not required, the conveyor rollers of assembly machine 4 transport the assembled U-rib plate unit to the external welding section. After the external welding is completed, it is then transported to straightening machine 8 for straightening. After straightening is completed, the process is finished.

[0031] In an optional implementation, a transverse chain conveyor is used when conveying the material to the inner welding machine 6 in step S3.

[0032] In this embodiment, the transverse conveyor 3 is arranged laterally between the two production lines. Specifically, the transverse conveyor 3 can be located between the grinding machine 1 and the assembly machine 4 on the first production line, and between the inner welding machine 6 and the outer welding machine 5 on the other end; or it can be located at the output end of the assembly machine 4 and at the input end of the inner welding machine 6. The connection positions of its two ends can be arranged according to the actual situation on site.

[0033] Specifically, in this embodiment, the transverse conveyor 3 is a lifting roller conveyor 2 with a steering function.

[0034] In an optional implementation, in step S2, after assembly, the assembly is positioned by spot welding before proceeding to step S3.

[0035] The steel plate is fixed by a clamping device, and the U-rib is clamped by a hydraulic device. The U-rib is assembled with the steel plate by spot welding to achieve initial positioning between the U-rib plate and the steel plate. Then, step S3 is performed for internal or external welding.

[0036] In an optional embodiment, the lifting roller conveying device 2 includes multiple spliced ​​roller lifting platforms 9; the roller lifting platform 9 includes a platform body 10, a roller lifting assembly 11, a support structure, and a unified control unit; the roller lifting assembly 11 is disposed on the platform body 10 and forms a lifting and lowering fit with the platform body 10 to carry and convey workpieces; the support structure is installed on the platform body 10 and connected to the roller lifting assembly 11 to support the lifting and lowering action of the roller lifting assembly 11; the unified control unit establishes signal connections with the roller lifting assembly 11 and the support structure respectively to control the lifting and lowering action and conveying action of the roller lifting assembly 11 and the support status of the support structure.

[0037] In this embodiment, the lifting roller conveyor 2 consists of multiple spliced ​​roller lifting platforms 9 and is equipped with a unified control unit. The platform body 10 has a frame structure with a worktable serving as the mounting base for all components. A support structure is embedded below the platform body 10 and connected to the roller lifting assembly 11 at its top. The roller lifting assembly 11 is mounted on the platform body 10, forming a sliding, liftable engagement with it. The unified control unit is connected to the roller lifting assembly 11 and the support structure via signal lines, forming an integrated structure of "mechanical structure + control module". Multiple roller lifting platforms 9 are connected via splicing structures at their ends, and the number of splices can be adjusted according to the production line length.

[0038] Specifically, in this embodiment, each roller lifting platform 9 can independently realize the carrying, lifting and conveying of workpieces. After multiple platforms are spliced ​​together, a transportation channel adapted to the length of the production line is formed. The support structure provides stable support for the roller lifting assembly 11 to ensure the carrying capacity of the lifting action. The unified control unit synchronously controls the action of all roller lifting platforms 9 to ensure that the transportation system after splicing operates in a consistent manner.

[0039] In this embodiment, the lifting roller conveying device 2 is divided into multiple independent roller lifting platforms 9. Each platform has complete lifting, conveying, supporting and limiting functions. The length can be extended by splicing to adapt to production lines of different lengths. The collaborative control principle is to collect the operating status signals of each platform through a unified control unit and send synchronous control commands to ensure that the lifting height and conveying speed of all platforms are consistent, and to avoid workpiece jamming caused by height or speed differences at the splicing points.

[0040] In application, the number of roller lifting platforms 9 to be assembled is first determined based on the total length of the production line. Multiple platforms are then fixedly connected via the splicing flanges at the ends of the platform bodies 10 to form a complete transport channel. Then, operating parameters are set through a unified control unit, including the lifting height, conveying speed, and limit distance of different roller lifting platforms 9. During operation, the unified control unit sends a start command to each roller lifting platform 9. The support structure maintains a stable support state, and the roller lifting assembly 11 rises to the preset height according to the command. The workpiece is conveyed from the previous process equipment to the bearing surface of the roller lifting assembly 11. The roller lifting assembly 11 then activates its conveying function, smoothly transferring the workpiece to the next process equipment. When the workpiece height needs to be adjusted, the unified control unit controls the corresponding roller lifting assembly 11 to rise and fall, adapting to the workstation height of different equipment. If a platform malfunctions, the unified control unit can shut down that platform individually, while the remaining platforms continue to operate, ensuring uninterrupted production line operation.

[0041] In an optional embodiment, the roller lifting assembly 11 includes a rotating mechanism 13, a lifting mechanism 14, and a roller assembly 12; the roller assembly 12 is disposed on the rotating mechanism 13, and the rotating mechanism 13 is disposed on the lifting mechanism 14.

[0042] In this embodiment, the roller assembly 12 is a load-bearing and conveying component that directly contacts the workpiece; the bottom of the rotating mechanism 13 is connected to the lifting mechanism 14, and the top is fixed to the roller assembly 12 to form a rotating support structure, which can drive the roller assembly 12 to rotate and realize the adjustment of the transport direction; the lifting mechanism 14, as the lowest power execution component, is connected to the support structure at the bottom and supports the rotating mechanism 13 and the roller assembly 12 at the top.

[0043] Specifically, in this embodiment, the lifting mechanism 14 provides vertical lifting power, driving the rotating mechanism 13 and the roller assembly 12 to lift synchronously, adapting to the workstation height of different equipment; the rotating mechanism 13 drives the roller assembly 12 to rotate around the vertical axis, realizing the angle adjustment of the workpiece, such as flipping or turning during welding; the roller assembly 12 realizes the linear conveying of the workpiece through the rotation of the roller body. The three work together, and the multi-directional adjustment and transfer of the workpiece can be completed without additional equipment.

[0044] During use, the unified control unit presets the action parameters, including lifting height, rotation angle, and conveying speed, according to the process requirements. When the workpiece is conveyed to the bearing surface of the roller assembly 12, if the height needs to be adjusted to adapt to the next equipment, the unified control unit starts the lifting mechanism 14, which drives the rotating mechanism 13 and the roller assembly 12 to rise to the target height. If the workpiece moves laterally, the lifting mechanism 14 maintains a stable height, the rotating mechanism 13 starts and drives the roller assembly 12 to rotate to the preset angle. After the angle adjustment is completed, the roller assembly 12 starts the conveying function to transfer the workpiece to the next process.

[0045] In an optional embodiment, the lifting mechanism 14 includes a lifting power device 26, a guide mechanism, a lifting base, and a lifting top plate 20; a rotating mechanism 13 is disposed on the lifting top plate 20; the lifting power device 26 is disposed on the lifting base and is connected to the lower side of the lifting top plate 20, which can provide power and support for the lifting of the lifting top plate 20; the guide mechanism connects the lifting top plate 20 and the lifting base.

[0046] In this embodiment, the lifting base serves as the mounting foundation for the lifting mechanism 14 and is fixed to the support structure's bearing seat. The lifting power device 26 (such as a hydraulic cylinder or pneumatic cylinder) is vertically fixed to the upper surface of the lifting base, and its output end is fixedly connected to the center position of the lower surface of the lifting top plate 20. The guiding mechanism includes guide columns and guide sleeves. There are multiple guiding mechanisms arranged around the lifting power device 26 in a circular array with the lifting power device 26 as the center. The guide sleeve is fixed to the lifting base, and the top end of the guide column is fixedly connected to the lower surface of the lifting top plate 20. The guide column and the guide sleeve form a sliding fit. The lifting top plate 20 is a horizontal flat plate structure, and the upper surface is used to install the rotating mechanism 13, forming a complete structure of base fixing - power drive - guide limit - top plate bearing.

[0047] In this embodiment, the lifting power device 26 drives the lifting top plate 20 to rise and fall through telescopic movement, thereby driving the rotating mechanism 13 and the roller assembly 12 to rise and fall synchronously, realizing the height adjustment of the workpiece. The guide mechanism restricts the movement direction of the lifting top plate 20, ensuring that the lifting action is carried out in the vertical direction and avoiding tilting or deviation. The lifting base provides stable support for the entire mechanism, dispersing the force of the lifting power device 26 and avoiding local stress concentration. The lifting top plate 20 bears the weight of the rotating mechanism 13 and evenly transmits the lifting power to the rotating mechanism 13 and the roller assembly 12, ensuring the smoothness of the lifting action. This structure solves the problems of unstable lifting and low positioning accuracy of the traditional lifting mechanism 14, ensuring the stability of the workpiece's posture during the lifting process.

[0048] In application, first select a suitable lifting power unit 26 based on the weight of the workpiece and the required lifting height. Connect the lifting power unit 26 to the detection sensors of the guide mechanism through a unified control unit, and preset the lifting height threshold and lifting speed.

[0049] During operation, the unified control unit sends a lifting command, the lifting power unit 26 starts and pushes the lifting top plate 20 upward, and the guide column slides synchronously along the guide sleeve to ensure that the lifting top plate 20 rises horizontally; when the detection sensor detects that the lifting top plate 20 has reached the preset height, it sends a signal to the unified control unit, the lifting power unit 26 stops and maintains the current position, and the rotating mechanism 13 and the roller assembly 12 stabilize at the target height with the lifting top plate 20; when it is necessary to lower, the lifting power unit 26 reverses its action, driving the lifting top plate 20 to descend slowly, and the guide column resets along the guide sleeve.

[0050] It is understood that in this embodiment, the lifting power device 26 is a hydraulic cylinder or a pneumatic cylinder, but it is not limited to hydraulic cylinders or pneumatic cylinders. It can also be an electric motor, which, in conjunction with a screw drive structure, drives the nut seat to rise and fall. The slide rail restricts the movement direction of the nut seat, and the lifting top plate 20 is fixed on the nut seat, thereby driving the roller assembly 12 to rise and fall. In other words, as long as it can drive the rotating mechanism 13 and the roller assembly 12 to rise and fall, it is acceptable.

[0051] In an optional embodiment, the rotating mechanism 13 includes a rotating base 19, an arc-shaped rack 21, a drive gear 22, and a rotating power device 23; the rotating power device 23 is fixedly mounted on the lifting top plate 20; the rotating base 19 is rotatably mounted on the lifting top plate 20, and the arc-shaped rack 21 is fixedly mounted on the side wall of the rotating base 19; the rotating power device 23 is connected to the drive gear 22 and can drive the drive gear 22 to rotate; the drive gear 22 meshes with the arc-shaped rack 21.

[0052] In this embodiment, the drive gear 22 is connected to the rotary power device 23 via a rotating shaft. Under the action of the rotary power device 23, it can rotate. When it rotates, it drives the arc-shaped rack 21 and the rotating base 19 that mesh with it to rotate around the central axis of the rotating base 19, thereby driving the roller assembly 12 on the rotating base 19 to rotate.

[0053] Specifically, in this embodiment, the rotating base 19 is a circular flat plate structure, which is rotatably connected to the upper surface of the lifting top plate 20 through a bearing or a rotating shaft, and can rotate around the central axis of the bearing or rotating shaft; the arc-shaped rack 21 is an arc-shaped strip structure, the curvature of which is consistent with the rotation trajectory of the rotating base 19, and is fixed to the outer side wall of the rotating base 19; the rotating power device 23 (such as a servo motor or a stepper motor) is fixed to the upper surface of the lifting top plate 20 through a bracket and is located on the side of the rotating base 19; the drive gear 22 is fixed on the output shaft of the rotating power device 23 and meshes with the arc-shaped rack 21 to form a power source-gear transmission-rotating carrier structure.

[0054] In use, the length of the arc-shaped rack 21 is first set according to the required rotation angle range of the process. The length of the arc-shaped rack 21 determines the rotation angle range. The rotation angle, rotation speed, and start / stop sequence are set through the unified control unit. During operation, when the workpiece needs to be adjusted in angle, the unified control unit sends a start signal to the rotary power unit 23. The rotary power unit 23 drives the drive gear 22 to rotate. The drive gear 22 meshes with the arc-shaped rack 21, causing the rotating base 19 to rotate. The roller assembly 12 rotates synchronously with the rotating base 19. The workpiece remains stable on the roller assembly 12 and rotates with it. When the preset angle is reached, the rotary power unit 23 stops and locks to ensure that the workpiece is kept at the target angle. After the angle adjustment is completed, the roller assembly 12 starts the conveying function to transfer the workpiece to the next process.

[0055] In an optional embodiment, the roller assembly 12 includes a roller base 17, a roller body 15, a roller shaft 16, and a roller power unit 18; the roller base 17 is disposed on a rotating base 19; the roller body 15 is rotatably connected to the roller base 17 via the roller shaft 16; the roller power unit 18 is disposed on the roller base 17 and connected to the roller shaft 16 or the roller body 15, and the roller power unit 18 can drive the roller body 15 to rotate.

[0056] In this embodiment, the roller assembly 12 includes a roller base 17, a roller body 15, a roller shaft 16, and a roller power unit 18. The roller base 17 is U-shaped, with its bottom fixed to a rotating base 19. The upper ends of its upward-extending portions have rotating holes. The roller shafts 16, located at both ends of the roller body 15, are inserted into these rotating holes. Bearings are provided between the roller shafts 16 and the rotating holes to reduce rotational friction. At least one of the two rotating holes on the roller base 17 is a through hole, allowing the roller power unit 18 to be directly or via a transmission structure connected to the roller shafts 16, driving the roller shafts 16 and the roller body 15 to rotate, thereby causing the U-rib plate above the roller to move accordingly.

[0057] The roller power unit 18 can be a geared motor or a stepper motor, or a hydraulic cylinder or a pneumatic cylinder, as long as it can provide the corresponding power for the rotation of the roller body 15. The roller power unit 18 is fixed to the end or side of the roller base 17, and its output end is connected to each roller shaft 16 through a transmission structure such as a synchronous belt or chain.

[0058] In an optional embodiment, the limiting device includes a limiting block 24; the limiting block 24 is disposed on the lifting top plate 20 and located at both ends of the rotation trajectory of the arc-shaped rack 21, and can limit the maximum rotation angle at both ends of the arc-shaped rack 21.

[0059] In this embodiment, the limiting device can be fixedly installed on the lifting top plate 20 or fixedly installed on the arc-shaped rack 21.

[0060] Specifically, in this embodiment, when the limiting device is a limiting block 24 fixedly installed on the lifting top plate 20, the limiting block 24 is fastened to the preset mounting surface of the lifting top plate 20 by bolts, and the installation position corresponds to the movement trajectory of the arc-shaped rack 21. When the arc-shaped rack 21 rotates under the action of the drive gear 22, after it rotates to a set angle, its end abuts against the limiting block 24, preventing the arc-shaped rack 21 from continuing to rotate, thus completing the limiting in that direction; similarly, another limiting block 24 is provided at the other end of the arc-shaped rack 21, which limits the other rotation direction of the arc-shaped rack 21, ultimately achieving bidirectional mechanical limiting.

[0061] Specifically, in this embodiment, when the limiting device is a limiting block 24 disposed on the arc-shaped rack 21, it is disposed at both ends of the arc-shaped rack 21. When the arc-shaped rack 21 rotates to a certain extent under the action of the driving gear 22, the limiting block 24 contacts the driving gear 22. Since there are no teeth on the limiting block 24 that mesh with the driving gear 22, it cannot continue to rotate under the action of the driving gear 22, thereby achieving the mechanical limiting function of the arc-shaped rack 21.

[0062] In this embodiment, the limiting device can also be an electronic limiting device, which includes a distance sensor, a controller, a signal transmission line and an actuator. The distance sensor is fastened to the lifting top plate 20 by a customized bracket bolt. The installation position is precisely corresponding to the two extreme nodes of the rotation trajectory of the arc rack 21, and the detection direction of the sensor is perpendicular to the outer peripheral surface of the arc rack 21 to ensure the stability of the detection signal.

[0063] The position change of the arc-shaped rack 21 is detected by the distance sensor. When the arc-shaped rack 21 rotates under the action of the drive gear 22 and reaches the detection position of the distance sensor, the distance sensor detects that the distance has shortened, thereby determining that the arc-shaped rack 21 has reached the set position, and the rotation power device 23 stops.

[0064] The limiting device can also be a proximity switch 25. When the arc-shaped rack 21 rotates under the drive of the drive gear 22, and the arc-shaped rack 21 approaches the proximity switch 25, the proximity switch 25 detects the arc-shaped rack 21 and transmits a signal to the rotating power device 23, causing the rotating power device 23 to stop.

[0065] It is understood that in this embodiment, a distance sensor is used to detect the position of the arc-shaped rack 21, but it is not limited to a distance sensor. It can also be other types of sensors, such as Hall sensors, as long as they can detect the position of the arc-shaped rack 21.

[0066] It is also important to understand that the limiting device can be a mechanical limit or an electronic limit, or it can perform both mechanical and electronic limiting simultaneously.

[0067] In an optional embodiment, the support structure includes a suspension support plate 27, a connecting column 28, and a bearing seat; the connecting column 28 is vertically disposed inside the platform body 10, with its top end fixedly connected to the top frame of the platform body 10 and its bottom end fixedly connected to the suspension support plate 27; the bearing seat is horizontally disposed below the suspension support plate 27, with its upper surface fixedly connected to the suspension support plate 27 and its lower surface fixedly connected to the lifting base of the roller lifting assembly 11; the connecting column 28 cooperates with the suspension support plate 27 such that the distance between the suspension support plate 27 and the upper surface of the platform body 10 is greater than the distance between the mounting plane of the roller lifting assembly 11 and the top of the roller body 15, and the top of the roller body 15 is higher than the upper surface of the platform body 10 when it is raised to its highest point.

[0068] In this embodiment, the connecting column 28 is a vertically arranged columnar structure, evenly distributed along the length of the platform body 10. The top end is fixedly connected to the top frame of the platform body 10 by bolts or welding, and the bottom end is fixedly connected to the upper surface of the suspension support plate 27. The suspension support plate 27 is a horizontal flat plate structure, located in the upper middle part inside the platform body 10, and parallel to the upper surface of the platform body 10. The bearing seat is a block or frame structure, evenly distributed on the lower surface of the suspension support plate 27. The upper surface is fixedly connected to the suspension support plate 27, and the lower surface is fixedly connected to the lifting base of the roller lifting assembly 11.

[0069] The key structural relationship is: the distance between the suspension support plate 27 and the upper surface of the platform body 10 is greater than the distance between the mounting plane of the roller lifting assembly 11 and the top of the roller body 15, and the top of the roller body 15 is higher than the upper surface of the platform body 10 when it is raised to the highest point.

[0070] The support structure provides stable support for the roller lifting assembly 11 and enables the roller body 15 to switch between concealed and exposed states. The connecting column 28, together with the suspension support plate 27 and the bearing seat, forms a suspended support structure, providing rigid support for the lifting base and the entire roller lifting assembly 11, ensuring structural stability when carrying workpieces. When the roller body 15 is raised to its highest point, its top is higher than the upper surface of the platform body 10 (exposed state), enabling the carrying and conveying of workpieces.

[0071] Secondly, the present invention provides a U-rib plate unit production line, using the production method described in any of the foregoing embodiments.

[0072] The beneficial effects of the embodiments of the present invention are: The lifting roller conveyor 2 enables the conveying and transfer between grinding, assembly, welding slag removal and straightening processes. This eliminates the dependence on lifting equipment, avoids occupying lifting equipment resources, and prevents the production line from being restricted by lifting equipment scheduling, thus greatly improving the overall equipment utilization rate. It also saves the time spent on hooking and unhooking during lifting and hoisting, shortens the process connection time, and improves the production flow efficiency of the U-rib plate unit.

[0073] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for producing U-rib plate units equipped with roller conveyors, characterized in that, Includes the following steps: S1. Grind the U-ribs and steel plates; S2. Assemble the U-ribs and steel plates to form an integral structure; S3. Weld the assembled overall structure; S4. Remove the welding slag generated during welding. S5. Correct the semi-finished products after welding; S6. Painting process to obtain the finished product; The transfer between the above steps is all completed using lifting roller conveyor equipment; The lifting roller conveying equipment includes multiple spliced ​​roller lifting platforms; The roller lifting platform includes a platform body, roller lifting components, support structure, and unified control unit; The roller lifting assembly is mounted on the platform body and forms a lifting and lowering cooperation with the platform body to carry and transport the workpiece. The support structure is installed on the platform body and connected to the roller lifting assembly to support the lifting action of the roller lifting assembly. The unified control unit establishes signal connections with the roller lifting assembly and the support structure respectively, so as to control the lifting and conveying actions of the roller lifting assembly and the support status of the support structure. The roller lifting assembly includes a rotating mechanism, a lifting mechanism, and a roller assembly; The roller assembly is mounted on the rotating mechanism, and the rotating mechanism is mounted on the lifting mechanism; The lifting mechanism includes a lifting power unit, a guide mechanism, a lifting base, and a lifting top plate; The rotating mechanism is disposed on the lifting top plate; The lifting power device is installed on the lifting base and is connected to the lower side of the lifting top plate, which can provide power and support for the lifting of the lifting top plate; The guide mechanism connects the lifting top plate and the lifting base; The rotating mechanism includes a rotating base, an arc rack, a drive gear, and a rotating power device; The rotary power device is fixedly mounted on the lifting top plate; The rotating base is rotatably mounted on the lifting top plate, and the arc-shaped rack is fixedly mounted on the side wall of the rotating base; The rotary power device is connected to the drive gear and can drive the drive gear to rotate; The drive gear meshes with the arc-shaped rack; The roller assembly includes a roller base, a roller body, a roller shaft, and a roller power unit; The roller base is mounted on the rotating base; The roller body is rotatably connected to the roller base via the roller shaft; The roller power unit is mounted on the roller base and connected to the roller shaft or the roller body. The roller power unit can drive the roller body to rotate.

2. The production method of the U-rib plate unit equipped with a roller conveyor line according to claim 1, characterized in that, Before step S3, the welding method is determined: If internal welding is required, the sample is first sent to the internal welding machine for internal welding, and then sent to the external welding machine for external welding. If internal welding is not required, the product is directly sent to an external welding machine for external welding. After the external welding is completed, proceed to step S4.

3. The production method of the U-rib plate unit equipped with a roller conveyor line according to claim 2, characterized in that, In step S3, a transverse chain conveyor is used when conveying materials to the inner welding machine.

4. The production method of the U-rib plate unit equipped with a roller conveyor line according to claim 1, characterized in that, In step S2, after assembly, the parts are positioned by spot welding before proceeding to step S3.

5. The production method of the U-rib plate unit equipped with a roller conveyor line according to claim 1, characterized in that, It also includes a limiting device; The limiting device includes a limiting block; The limiting block is disposed on the lifting top plate and located at both ends of the rotation trajectory of the arc-shaped rack, which can limit the maximum rotation angle at both ends of the arc-shaped rack.

6. A U-rib plate unit production line, characterized in that, Use the production method according to any one of claims 1-5.

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