Welding device for traffic signboard with positioning function

Abstract

The application discloses a traffic signboard welding device with positioning function, and relates to the technical field of signboard processing, aiming to solve the problems of low positioning precision and high artificial dependence of existing welding operation. The device comprises a portal frame, a moving frame, a clamping mechanism, a reinforcing rib conveying mechanism, a base conveying mechanism and a welding robot. The portal frame is an integral support main body. The moving frame drives the clamping mechanism to move along the portal frame. The clamping mechanism is driven to lift by an electric push rod and to clamp by a motor II, so that stable clamping and position adjustment of the vertical rod are realized. The reinforcing rib conveying mechanism stores materials in a containing cavity, pushes the materials by a pushing mechanism and prevents jamming by a knocking assembly, so that the reinforcing rib is accurately inserted and positioned with the vertical rod. The base conveying mechanism is driven by a motor IV to drive a screw rod, so that automatic conveying and limiting positioning of the base are realized. The mechanisms are cooperatively matched to realize automatic positioning and welding operation of the vertical rod, the reinforcing rib and the base, and positioning precision and operation efficiency are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of sign processing technology, and in particular to a welding device for traffic signs with positioning function. Background Technology

[0002] As an important component of road traffic safety facilities, traffic signs are directly affected by their structural stability, which in turn affects their safety and service life. Traffic signs are usually formed by welding together components such as poles, reinforcing ribs, bases, and signs. The connection strength between the poles and bases and the assembly accuracy of the reinforcing ribs and poles are key to ensuring the overall structural stability of the sign. Therefore, the positioning accuracy and work quality in the welding process are crucial to the product performance.

[0003] Currently, welding of traffic signs mostly employs manual positioning or simple tooling-assisted positioning. Manual positioning requires operators to manually adjust the relative positions of the uprights, reinforcing ribs, and base, determining the welding nodes through methods such as measuring with a tape measure and marking lines, before welders perform the welding. This method not only relies on the operator's experience and skills, but also makes it difficult to guarantee positioning accuracy, easily leading to problems such as upright tilting and reinforcing rib misalignment, resulting in uneven stress on the weld and affecting the structural stability of the sign. At the same time, manual positioning and welding processes are time-consuming and inefficient, making it difficult to meet the needs of large-scale mass production. Furthermore, long-term repetitive labor can easily cause operator fatigue, further increasing the probability of welding defects.

[0004] In addition, in traditional welding operations, operators need to be in close contact with the welding area, and high temperatures and arc light can easily cause harm to the human body, so the safety of the operation needs to be improved. Moreover, the quality of welds produced by manual welding is greatly affected by factors such as operating techniques and emotional state, resulting in poor weld consistency among products in the same batch and a high rate of subsequent rework, which further increases the production cycle and cost.

[0005] Therefore, those skilled in the art provide a welding device for traffic signs with positioning function to solve the problems mentioned in the background art. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a welding device for traffic signs with positioning function.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A welding device for traffic signs with positioning function includes: a gantry frame, wherein two movable frames and a welding robot are slidably fitted at the bottom of the gantry frame; The clamping mechanism, located at the bottom of the movable frame, includes two electric push rods, motor II, and two sets of rolling wheels. The rolling wheels are driven to rise and fall by the electric push rods, and the rolling wheels are driven to move closer to each other to clamp and position the opposing pole by motor II. A reinforcing rib conveying mechanism is located on one side of the gantry frame and includes a connecting support. The connecting support has a receiving cavity and a guide groove. The reinforcing rib is pushed to move along the guide groove by a pushing mechanism, so that the upright and the reinforcing rib are inserted and positioned by slot I and slot II. The base conveying mechanism is located below the reinforcing rib conveying mechanism and includes a guide support. The guide support is equipped with a limit support and a push plate. The push plate is driven by motor IV to move the base II to the positioning position.

[0008] As a further improvement to the above technical solution: The mobile frame includes a sliding support, and a motor I is bolted to one side of the sliding support. A gear I is welded to the output end of the motor I, and the gear I meshes with a rack on one side of the gantry frame for transmission. The sliding support is welded and fixed to the bottom of the mounting frame. The bottom of the mounting frame is bolted to the base I. The electric push rod is bolted to the top of the base I. Its output end passes through the base I and is welded to the lifting support. The top of the base I is bolted to the support seat. The motor II is bolted to the support seat.

[0009] A sleeve rod is welded and fixed to the output end of the motor II. A spline shaft is slidably fitted inside the sleeve rod. The bottom end of the spline shaft is rotatably connected to the lifting support through a bearing. The bottom of the lifting support is provided with two movable supports that slide together. Gear II is welded and fixed to the bottom end of the spline shaft. Rack I is welded and fixed to one side of the movable support. Rack I meshes with gear II for transmission. Rolling wheels are respectively located at the bottom of the two movable supports.

[0010] Two extension frames are welded and fixed to the bottom of the movable support. One side of the extension frame is C-shaped. The two extension frames on the same side are rotatably connected by a rotating shaft I through a bearing. The rolling wheel is interference-fitted onto the rotating shaft I. One of the extended frames is bolted to a motor III. The output of motor III is connected to the rotating shaft I via a synchronous pulley and a synchronous belt, driving the upright to rotate and change the welding position.

[0011] Two guide rods I are slidably provided through one side of the connecting support, and a clamping plate is welded and fixed to one end of the guide rod I located in the receiving cavity; The outer wall of the guide rod I is fitted with a spring I. The two ends of the spring I abut against the outer side of the clamping plate and the inner wall of the receiving cavity, respectively. The spring I pushes the clamping plate to press the reinforcing ribs.

[0012] The pushing mechanism includes a guide rod II, which is bolted to one side of the connecting support. A movable connecting rod is slidably fitted on the outer wall of the guide rod, and a sliding slider is slidably fitted on the outer wall of the movable connecting rod. A guide rod III is welded and fixed to the top of the sliding slider. The guide rod III passes through the moving connecting rod and is fitted with a spring II on its outer wall. A multi-stage electric push rod is bolted to the top of the connecting support. Its output end is welded and fixed to the moving connecting rod. The moving connecting rod is equipped with a striking component to strike the reinforcing rib to prevent jamming.

[0013] The striking assembly includes a fixed support, which is bolted to the top of the sliding slider, and a striking rod is slidably provided through one side of the fixed support. The outer wall of the striking rod is fitted with a spring III and two limiting rings. The two ends of the spring III abut against the inner wall of the fixed support and the middle limiting ring, respectively. The top of the sliding slider is provided with a driving component, which works with the spring III to drive the striking rod to move back and forth.

[0014] A guide rod IV is slidably provided through one side of the sliding slider, and a push block is welded and fixed to one end of the guide rod IV; A spring IV is fitted on the outer wall of the guide rod IV. The two ends of the spring IV are welded and fixed to one side of the sliding slider and one end of the guide rod IV, respectively. The reinforcing rib is pushed by the elastic force of the spring IV.

[0015] The bottom of the guide support is rotatably connected to a screw via a bearing, and the push plate is threadedly fitted onto the screw. The bottom of the guide support has a rectangular through hole, the top of the push plate passes through the rectangular through hole and abuts against the base II, and the output end of the motor IV is welded and fixed to the screw, driving the screw to move the push plate.

[0016] The driving component includes a rotating shaft II, which rotates through the top of the sliding block via a bearing. A toggle rod is welded and fixed to the top of the shaft II, and a gear is connected to the bottom of the shaft II via a one-way bearing. A rack II is welded and fixed to the top of the connecting support. The rack II meshes with the gear at the bottom of the rotating shaft II, which drives the actuating rod to push the limiting ring so that the striking rod reciprocates.

[0017] The beneficial effects of this invention are as follows: 1. Motor II drives gear II to rotate, causing double rack I to move relative to each other, achieving synchronous approach of the two moving supports. Combined with the sliding engagement of the spline shaft and sleeve rod, the rolling wheel adapts to the column size and forms a stable clamp, preventing radial displacement of the column during welding. The column height is adjusted through precise telescopic control of the electric push rod, combined with the smooth movement of the moving frame along the gantry guide rail, accurately delivering the column to the preset installation position of base II, ensuring a close fit between the bottom of the column and base II. During the delivery of reinforcing ribs, the guide groove provides rigid constraint on their movement trajectory, and the push block maintains stable thrust under the elastic action of spring IV. Combined with the reciprocating striking of the striking component, jamming is prevented, allowing the slot II of the reinforcing rib to precisely align and insert with the slot I of the column, keeping the mating deviation to a minimum. The precise positioning of each component provides a stable operating benchmark for the welding robot, effectively reducing defects such as weld misalignment and incomplete welds, improving the consistency of welding quality within the same batch of products, and reducing subsequent rework rates.

[0018] 2. The device achieves fully automated operation from base positioning and upright clamping and conveying to reinforcing rib pushing: the positioning of base II is achieved by the screw rotation driven by motor IV, with automatic conveying and limiting completed by the pushing plate; the clamping and movement of the uprights rely on the coordinated action of motor I, motor II, and electric push rods, eliminating the need for manual handling or posture adjustment; the feeding of reinforcing ribs is achieved automatically by the elastic force of spring I, and pushing and anti-jamming are completed by the cooperation of multi-stage electric push rods and striking components. The entire process only requires manual initial material loading; subsequent positioning, conveying, and welding are all automatically performed by the device. Compared with traditional manual positioning and welding methods, this reduces the intensity of manual operation and training costs, making it particularly suitable for large-scale mass production scenarios. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a welding device for traffic signs with positioning function proposed in this invention; Figure 2 This is a schematic diagram of the mobile frame structure of a welding device for traffic signs with positioning function proposed in this invention; Figure 3 This is a schematic diagram of the clamping mechanism of a welding device for traffic signs with positioning function proposed in this invention; Figure 4 This is a schematic diagram of the rolling wheel and pole structure of a welding device for traffic signs with positioning function proposed in this invention; Figure 5 This is a schematic diagram of the reinforcing rib conveying mechanism of a welding device for traffic signs with positioning function proposed in this invention; Figure 6 This is an exploded structural diagram of the fixed support and rotating shaft II of a welding device for traffic signs with positioning function proposed in this invention. Figure 7 This is a schematic diagram of the base conveying mechanism of a welding device for traffic signs with positioning function proposed in this invention; Figure 8 This is a schematic diagram of the base conveying mechanism of a welding device for traffic signs with positioning function proposed in this invention from another perspective. Figure 9 This is a schematic diagram of the structure of the pole, base II, and reinforcing ribs of a traffic sign.

[0020] In the diagram: 1. Gantry frame; 2. Moving frame; 21. Sliding support; 22. Motor I; 23. Gear I; 24. Mounting frame; 25. Base I; 26. Support seat; 3. Clamping mechanism; 31. Lifting support; 32. Electric push rod; 33. Motor II; 34. Sleeve rod; 35. Splined shaft; 36. Moving support; 37. Gear II; 38. Rack I; 39. Extension frame; 391. Rotating shaft I; 392. Rolling wheel; 393. Motor III; 4. Upright pole; 41. Slot I; 5. Welding robot; 6. Reinforcing rib conveying mechanism; 61. Connecting support; 62. Receiving cavity; 63. Guide groove; 64. Guide rod I; 65. Pressing plate; 66. Spring I; 67. Guide rod II; 68. Moving linkage; 69. Sliding slider; 611. Spring II; 612. Guide rod III; 613. Multi-stage electric push rod; 614. Rack II; 615. Rotating shaft II; 616. Actuating rod; 617. Fixed support; 618. Striking rod; 619. Spring III; 621. Guide rod IV; 622. Spring IV; 623. Push block; 624. Limiting ring; 7. Base conveying mechanism; 71. Guide support; 72. Screw; 73. Motor IV; 74. Push plate; 75. Limiting support; 76. Rectangular through hole; 8. Base II; 9. Reinforcing rib; 91. Slot II. Detailed Implementation

[0021] 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. It should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection", and "setting" should be interpreted broadly. For those skilled in the art, the specific meaning of the above terms in this patent can be understood according to the specific circumstances.

[0022] Reference Figures 1-9 A welding device for traffic signs with positioning function is applicable to the welding and positioning of poles, reinforcing ribs and bases in the production process of traffic signs. It achieves precise positioning and efficient welding of components through the coordinated cooperation of various mechanisms. Its overall structure is stable and reliable, easy to operate and has low maintenance costs.

[0023] The system includes: a gantry frame 1, which serves as the main support structure for the entire device. It is constructed from high-strength steel and welded together. The connection between the crossbeams and columns is reinforced with full welding, and triangular supports are welded to the outside to enhance torsional resistance and ensure no significant deformation occurs under load. Two parallel guide rails are laid along the length of the bottom of the gantry frame 1. These rails are secured to the mounting surface at the bottom of the gantry frame 1 with countersunk bolts. The bolt spacing is controlled within a reasonable range to avoid uneven stress on the guide rails. The guide rail surfaces are precision ground and chrome-plated to reduce the coefficient of friction while enhancing wear resistance. Pre-drilled bolt holes are provided on the gantry frame 1 corresponding to the working areas of the clamping mechanism 3, the reinforcing rib conveying mechanism 6, and the base conveying mechanism 7. The welding robot 5 is fixedly installed through these bolt holes, and its working radius completely covers the entire positioning area, allowing for precise welding of each welding node according to a preset program.

[0024] The sliding support 21 of the movable frame 2 engages with the guide rail at the bottom of the gantry 1 via a slider. Ball bearings are embedded inside the slider, and the contact surface between the balls and the guide rail is polished to reduce resistance during movement. On the mounting plate on one side of the sliding support 21, the motor I 22 is fixed with four evenly distributed bolts. Rubber shock-absorbing pads are placed between the motor I 22 and the mounting plate to effectively absorb vibrations generated during operation and prevent impact on the overall structural stability. The output shaft end of the motor I 22 has a keyway, which is tightly connected to the gear I 23 via a flat key. The gear I 23 meshes with a pre-set rack on one side of the gantry 1. The rack is mounted on the side of the gantry 1 using a combination of welding and bolts. The tooth surface has undergone heat treatment to achieve a suitable hardness, extending the service life of the meshing transmission.

[0025] The bottom of the sliding support 21 is welded and fixed to the mounting frame 24 with a continuous fillet weld. The weld height matches the plate thickness, and the weld undergoes flaw detection after welding to ensure there are no defects such as porosity or cracks. The bottom of the mounting frame 24 is fastened to the base I 25 with bolts. Anti-loosening washers are installed at the bolt connections to prevent loosening due to long-term vibration. Two electric push rods 32 are symmetrically arranged on the top of the base I 25. The bottom of the cylinder of the electric push rod 32 is welded with a mounting flange, which is bolted to the base I 25. A dust cover is fitted on the outside of the cylinder to prevent dust from entering and affecting the telescopic performance. The output shaft of the electric push rod 32 passes through a reserved through hole on the base I 25. A guide sleeve made of copper is installed on the inner wall of the through hole to reduce wear during the extension and retraction of the output shaft. The end of the output shaft is welded and fixed to the top of the lifting support 31. Before welding, the connecting surfaces are ground and rust-removed to ensure the weld strength.

[0026] A support base 26 is welded to the top of the base I 25 near the edge, and reinforcing ribs are also welded at the connection between the horizontal and vertical plates. The motor II 33 is fixed to the horizontal plate of the support base 26 by bolts. The horizontal plate is pre-machined with positioning pin holes to ensure that the output shaft axis of the motor II 33 is aligned with the subsequent transmission components when it is installed. Sufficient clearance is reserved between the output shaft of the motor II 33 and the horizontal plate to avoid interference during rotation.

[0027] One end of the sleeve rod 34 of the clamping mechanism 3 is welded to the output shaft of the motor II 33. The welding is done using a double-sided welding process, resulting in a full weld that has been ground. A spline hole is machined inside the sleeve rod 34, and the external spline of the spline shaft 35 mates with this hole. The clearance is controlled within a small range, allowing for torque transmission while permitting axial movement of the spline shaft 35. The bottom end of the spline shaft 35 is mounted in a bearing housing at the top of the lifting support 31 via a deep groove ball bearing. The bearing housing is bolted to the lifting support 31. The outer ring of the bearing has an interference fit with the bearing housing, while the inner ring has a transition fit with the spline shaft 35. Sealing rings are installed on both sides of the bearing to prevent lubricant leakage and impurities from entering.

[0028] Two parallel guide rails are machined at the bottom of the lifting support 31, with chamfered edges to prevent scratching the slider during installation. Two movable supports 36 are respectively connected to the guide rails via sliders. Lubrication nozzles are located on the sides of the sliders, allowing for periodic grease injection to ensure smooth movement. The bottom end of the splined shaft 35 is connected to gear II 37 via a flat key. The key and keyway use a transition fit; after installation, spot welding adhesive is applied to the end of the key to prevent loosening. Rack I 38 is welded to the side of each movable support 36 that is close to each other. The tooth pitch of rack I 38 matches that of gear II 37. Before welding, rack I 38 is positioned with the movable support 36 to ensure the tooth surface is parallel to the direction of movement of the movable support 36. After welding, the flatness of the tooth surface is checked again.

[0029] Two extension frames 39 are welded to the bottom of the movable support 36. The two extension frames 39 are symmetrically distributed, with one side machined into a C-shape. The size of the C-shaped opening is slightly smaller than the diameter of the upright 4, and the edge of the opening is rounded to avoid scratching the surface of the upright 4 during clamping. Two rotating shafts I 391 are installed between the two extension frames 39 on the same side via rolling bearings. The inner ring of the bearing is interference-fitted with the rotating shaft I 391, and the outer ring is transition-fitted with the mounting holes on the extension frame 39. The portions of the rotating shaft I 391 extending out of the extension frame 39 are fitted with retaining rings to prevent axial movement of the rotating shaft I 391. Two rolling wheels 392 are fixedly mounted on the outer wall of the rotating shaft I 391. The rolling wheels 392 are made of elastic rubber with an embedded metal skeleton to enhance structural strength. The rubber surface is treated with anti-slip coating to ensure clamping force without damaging the upright 4.

[0030] One of the extension frames 39 has a motor mounting plate welded to its outer side, and motor III 393 is bolted to this mounting plate. Synchronous pulleys are mounted on one end of the output shaft of motor III 393 and the corresponding rotating shaft I 391. The synchronous pulleys are fixed by a key connection, with a locating pin installed between the key and the keyway. A timing belt tensioning sleeve is fitted onto the two synchronous pulleys, with the teeth on the inner side of the timing belt meshing with the teeth of the timing pulleys. When motor III 393 is running, power is transmitted to rotating shaft I 391 through the synchronous pulleys and timing belt, driving the rolling wheel 392 to rotate, which in turn drives the clamped upright 4 to rotate.

[0031] The connecting support 61 of the reinforcing rib conveying mechanism 6 is fixed to one side of the gantry frame 1 with bolts to ensure a firm fixation. The mounting surface of the connecting support 61 is milled to ensure flatness, and the top-machined receiving cavity 62 is cuboid in shape with polished inner walls to reduce friction during the stacking and movement of the reinforcing ribs 9. The length and width of the receiving cavity 62 are designed according to the dimensions of common reinforcing ribs 9, allowing multiple reinforcing ribs 9 to be stacked at once for convenient continuous operation.

[0032] A guide groove 63 is machined on the top side of the connecting support 61 near the upright 4. The guide groove 63 has a U-shaped cross-section, and its bottom is flush with the bottom of the receiving cavity 62, ensuring that the reinforcing rib 9 can smoothly enter the guide groove 63 from the receiving cavity 62. The edge of the guide groove 63 is chamfered to avoid scratching the surface of the reinforcing rib 9. Its width is slightly larger than the thickness of the reinforcing rib 9 to ensure that the reinforcing rib 9 moves smoothly without shifting to the left or right.

[0033] Two parallel guide holes are machined on one side of the connecting support 61. The inner walls of the guide holes are chrome-plated, and the guide rod I 64 slides through these guide holes. One end of the guide rod I 64 is welded to the outer side of the pressure plate 65. Before welding, a bevel is made at the joint to increase the welding area. The surface of the pressure plate 65 is flattened, and a soft rubber pad is attached to the side that contacts the reinforcing rib 9 to prevent damage to the reinforcing rib 9. A spring I 66 is fitted on the outer wall of the guide rod I 64. The spring I 66 is a compression spring, which is in a slightly compressed state in its natural state. Its two ends abut against the outer side of the pressure plate 65 and the inner wall of one side of the receiving cavity 62, respectively. The elastic force of the spring I 66 keeps the reinforcing rib 9 pressed against the guide groove 63, which can automatically drive the inner reinforcing rib 9 to correspond with the guide groove 63.

[0034] The guide rod II 67 of the pushing mechanism is welded to a mounting base on one side of the connecting support 61 at both ends. The mounting base is fixed to the connecting support 61 by bolts. The guide rod II 67 is parallel to the guide groove 63, and its surface is ground to keep the roughness within a low range. The moving link 68 has a through hole machined inside, through which it slides onto the guide rod II 67. A wear-resistant bushing is installed on the inner wall of the through hole, and the bushing and the guide rod II 67 are clearance-fitted to ensure that the moving link 68 moves flexibly.

[0035] The sliding slider 69 is fitted onto the outer wall of the moving link 68, with a small gap between them. A guide rod III 612 is welded to the top of the sliding slider 69, and the guide rod III 612 is perpendicular to the axis of the moving link 68. A guide hole is machined on the moving link 68, through which the guide rod III 612 passes, and a bushing is also installed on the hole wall. A spring II 611 is fitted onto the outer wall of the guide rod III 612. The spring II 611 is a compression spring, with its two ends abutting against the top of the sliding slider 69 and the bottom of the moving link 68, respectively, providing a downward elastic force to the sliding slider 69. This ensures that the sliding slider 69 always maintains a stable posture. At the same time, during reset, it can move upward in cooperation with the inclined surface of the reinforcing rib 9, and after the reset movement, the spring II 611 drives the sliding slider 69 to reset downward, once again located on one side of the reinforcing rib 9.

[0036] The mounting base of the multi-stage electric actuator 613 is fixed to the top of the connecting support 61 by bolts. Adjusting shims are placed between the mounting base and the connecting support 61, and the installation height of the multi-stage electric actuator 613 can be adjusted by increasing or decreasing the number of shims. The output shaft end of the multi-stage electric actuator 613 is machined with external threads to mate with the threaded hole on one side of the moving connecting rod 68. Thread-locking adhesive is applied to the mating area to prevent loosening. The extension and retraction of the multi-stage electric actuator 613 drives the moving connecting rod 68 to move along the guide rod II 67.

[0037] The fixed support 617 of the striking assembly is bolted to the top of the sliding slider 69. A sliding hole is machined on one side of the fixed support 617, and the inner wall of the sliding hole is precision ground. The striking rod 618 slides through this hole. The end of the striking rod 618 near the reinforcing rib 9 is machined into a flat shape to avoid leaving dents on the surface of the reinforcing rib 9 during striking. Two limiting rings 624 are fitted on the outer wall of the striking rod 618, and the limiting rings 624 are connected to the striking rod 618 by welding. The outer limiting ring 624 abuts against one side of the fixed support 617 to prevent the striking rod 618 from coming out of the fixed support 617; the other limiting ring 624 is located inside the fixed support 617, and the two ends of the spring Ⅲ 619 fitted on the outer wall of the striking rod 618 abut against the inner wall of one side of the fixed support 617 and the limiting ring 624 in the middle, respectively.

[0038] A guide hole is machined on one side of the sliding slider 69, through which the guide rod IV 621 slides. A push block 623 is welded to one end of the guide rod IV 621. The side of the push block 623 that contacts the reinforcing rib 9 is machined into a flat surface to fit the surface of the reinforcing rib 9, increasing the contact area. A spring IV 622 is fitted onto the outer wall of the guide rod IV 621. The spring IV 622 is a compression spring, with its two ends welded and fixed to one side of the sliding slider 69 and one end of the guide rod IV 621, respectively. Under the elastic force of the spring IV 622, the push block 623 always maintains contact with the reinforcing rib 9, ensuring stable pushing force.

[0039] The drive shaft II 615 rotates through the top of the sliding slider 69 via a damping bearing. It will not rotate on its own without external force. The bearing housing is fixed to the sliding slider 69 with bolts. The bearing is a seated bearing, which is easy to install and provides good stability. A toggle lever 616 is welded to the top of the shaft II 615. The toggle lever 616 is perpendicular to the shaft II 615 and its end is machined into an arc shape to prevent jamming when it contacts the limit ring 624. A one-way bearing at the bottom of the shaft II 615 connects to a gear. The gear teeth are hardened to enhance wear resistance. A rack II 614 is welded to the top of the connecting support 61. The rack II 614 is parallel to the guide rod II 67, and its tooth pitch matches the tooth pitch of the gear at the bottom of the shaft II 615. The rack II 614 is fixed to the connecting support 61 with bolts of uniform spacing to ensure that the rack II 614 is installed flat and that the shaft II 615 will not rotate in the opposite direction during the reset process.

[0040] When the sliding slider 69 moves with the moving connecting rod 68, the gear at the bottom of the rotating shaft II 615 rolls along the rack II 614, causing the rotating shaft II 615 and the actuating rod 616 to rotate synchronously. When the actuating rod 616 rotates to contact the middle limiting ring 624, it pushes the limiting ring 624 to drive the striking rod 618 to move towards the reinforcing rib 9, while the spring III 619 is compressed. When the actuating rod 616 rotates and disengages from the limiting ring 624, the spring III 619 releases its elastic force, pushing the striking rod 618 to quickly return to its original position, thus achieving reciprocating striking of the reinforcing rib 9. This ensures that the reinforcing rib 9 moves smoothly within the guide groove 63, avoiding jamming due to excessive frictional resistance. Normally, one end of the striking rod 618 does not contact the reinforcing rib 9. When the reinforcing rib 9 encounters resistance, one side of the pushing block 623 is flush with the striking rod 618, at which point the striking rod 618 contacts the reinforcing rib 9.

[0041] The guide support 71 of the base conveying mechanism 7 is fixed to the ground by expansion bolts. The number of expansion bolts is determined according to the weight and stress of the guide support 71 to ensure that there will be no shaking after fixing. A guide groove is machined on the top of the guide support 71. The cross-sectional dimensions of the guide groove match the outer circle dimensions of the base II8. A wear-resistant rubber plate is installed inside the groove to reduce friction and wear when the base II8 moves. The rubber plate is fixed to the inner wall of the guide groove with glue, and the edges are pressed tightly with pressure strips to prevent it from falling off.

[0042] A limiting support 75 is welded to one end of the guide support 71. The top of the limiting support 75 has an opening, the shape of which matches the end shape of the base II 8. The edges of the opening are chamfered to facilitate the insertion of the base II 8 and achieve end positioning. A screw 72 is mounted on the bottom of the guide support 71 via a bearing housing. The bearing housing has a split structure for easy installation and removal of the screw 72. Deep groove ball bearings are used, and dust covers are installed on both sides. The screw 72 uses a trapezoidal thread with a reasonable thread profile angle, providing good transmission efficiency and self-locking performance. Both ends of the screw 72 are machined with smooth shaft sections to mate with the inner rings of the bearings.

[0043] A threaded hole is machined at the bottom of the push plate 74, which mates with the screw 72. The thread clearance is controlled within a suitable range to ensure smooth and stable movement of the push plate 74 without shaking. A rectangular through hole 76 is machined at the bottom of the guide support 71. The length of the rectangular through hole 76 is aligned with the axis of the screw 72. The top of the push plate 74 extends through the rectangular through hole 76 into the guide groove of the guide support 71, abutting against one side of the base II 8. A soft material is affixed to the side of the push plate 74 that contacts the base II 8 to prevent scratching the surface of the base II 8.

[0044] A motor mounting base is welded to one side of the guide support 71. Motor IV 73 is bolted to the mounting base, and a damping pad is placed between motor IV 73 and the mounting base to reduce vibration transmission during operation. The output shaft of motor IV 73 is connected to one end of screw 72 via a flexible coupling. The flexible coupling has a certain ability to compensate for misalignment, making up for installation coaxiality errors between motor IV 73 and screw 72. The forward and reverse rotation of motor IV 73 drives screw 72 to rotate, thereby moving the pusher plate 74 along screw 72, achieving the conveying and positioning of base II 8.

[0045] The operating procedure of the device is as follows: Multiple reinforcing ribs 9 are stacked and placed inside the receiving cavity 62. Under the elastic force of spring I 66, the clamping plate 65 presses the reinforcing ribs 9 towards the guide groove 63, ensuring that the reinforcing ribs 9 are neatly arranged on the side of the receiving cavity 62 closest to the guide groove 63. The base II 8 is placed in the guide groove of the guide support 71, with one side of the base II 8 contacting the push plate 74. The motor IV 73 is started, driving the screw 72 to rotate. Under the action of the threaded transmission, the push plate 74 pushes the base II 8 towards the limiting support 75 until one end of the base II 8 contacts the inner wall of the limiting support 75. The motor IV 73 is then turned off, and the base II 8 is positioned.

[0046] The gantry frame 1 moves, positioning the upright 4 below the two sets of rollers 392. The electric push rod 32 is activated, extending its output shaft and lowering the lifting support 31, positioning the two sets of rollers 392 on either side of the upright 4. The motor II 33 is then activated, driving the gear II 37 to rotate. The gear II 37 drives the two racks I 38 to move relative to each other, thereby bringing the two movable supports 36 closer together. The rollers 392 clamp the upright 4. The motor II 33 is then turned off, completing the clamping and fixing of the upright 4.

[0047] Retract the electric push rod 32, which will move the upright rod 4 to one side of the reinforcing rib conveying mechanism 6, making slot I 41 flush with slot II 91.

[0048] Start motor I22, which drives gear I23 to rotate. Gear I23 meshes with the rack on the gantry frame 1, driving the sliding support 21 to move along the gantry frame 1, so that the upright 4 is aligned with the reinforcing rib conveying mechanism 6. Then turn off motor I22.

[0049] The multi-stage electric push rod 613 is activated, and its output shaft extends, driving the moving connecting rod 68 to move along the guide rod II 67 towards the upright rod 4. The sliding block 69 moves synchronously with the moving connecting rod 68, and the pushing block 623 contacts the outermost reinforcing rib 9 of the receiving cavity 62 and pushes it to move along the guide groove 63. During this process, the gear at the bottom of the rotating shaft II 615 rolls along the rack II 614, driving the rotating shaft II 615 and the actuating rod 616 to rotate. The actuating rod 616 periodically pushes the limiting ring 624 in the middle, causing the striking rod 618 to move back and forth. When the moving resistance of the reinforcing rib 9 is large, the striking rod 618 can strike the reinforcing rib 9, ensuring that the reinforcing rib 9 moves smoothly and is pushed forward.

[0050] When the reinforcing rib 9 moves to the upright 4, the slot II 91 on the reinforcing rib 9 aligns with the slot I 41 on the upright 4. Under the continuous pushing force of the push block 623, the reinforcing rib 9 is inserted into the slot I 41, completing the insertion and positioning of the upright 4 and the reinforcing rib 9. At the same time, the subsequent reinforcing rib 9 moves to one side of the guide groove 63 under the force of the spring I 66, activating the multi-stage electric push rod 613 to reset. When the sliding slider 69 releases the subsequent reinforcing rib 9, it can be driven by the inclined surface of the reinforcing rib 9 to move upward until... The sliding block 69 passes over the reinforcing rib 9 and can return to its original position under the force of the spring Ⅱ 611. Since the gear at the bottom of the rotating shaft Ⅱ 615 is sleeved through a one-way bearing, the rotating shaft Ⅱ 615 will not be driven to rotate during the reset process. At the same time, the motor Ⅲ 393 is started. The motor Ⅲ 393 drives the rotating shaft Ⅰ 391 to rotate through the synchronous pulley and synchronous belt. The rotating shaft Ⅰ 391 drives the rolling wheel 392 to rotate. The friction between the rolling wheel 392 and the upright 4 drives the upright 4 to rotate slowly, and the reinforcing rib 9 is inserted into the upright 4 in sequence until the insertion is completed.

[0051] Start the electric push rod 32. The output shaft of the electric push rod 32 extends and drives the lifting support 31 to descend, driving the upright 4 and reinforcing rib 9 after the insertion is completed to move downward until the upright 4 is coaxial with the base II 8 and abuts against it.

[0052] Welding robot 5 is started. Following a preset program, welding robot 5 performs welding operations at the connection points between the upright 4 and base II 8, and between the upright 4 and reinforcing rib 9. During welding, if the welding angle of the upright 4 needs adjustment, motor III 393 is started. Motor III 393 drives shaft I 391 to rotate via a synchronous pulley and synchronous belt. Shaft I 391 drives rolling wheel 392 to rotate, and the friction between rolling wheel 392 and the upright 4 drives the upright 4 to rotate slowly.

[0053] After welding is completed, start the electric push rod 32, its output shaft extends, driving the lifting support 31 to descend, start the motor II 33 to reverse, driving the two moving supports 36 to move away from each other, and the rolling wheel 392 releases the upright 4. After the release is completed, start the electric push rod 32, its output shaft retracts, driving the lifting support 31 to rise to a safe height, and then the gantry 1 moves to continue welding the subsequent uprights 4.

[0054] In this application, the structures and connections not described in detail are all prior art, and their structures and principles are well known, so they will not be described in detail here.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding device for traffic signs with positioning function, characterized in that, include: Gantry (1), the bottom of the gantry (1) is slidably fitted with two movable frames (2) and a welding robot (5); The clamping mechanism (3) is located at the bottom of the mobile frame (2) and includes two electric push rods (32), motor II (33) and two sets of rolling wheels (392). The rolling wheels (392) are driven to rise and fall by the electric push rods (32), and the rolling wheels (392) are driven to move closer to each other by the motor II (33) to clamp and position against the upright (4). The reinforcing rib conveying mechanism (6) is located on one side of the gantry frame (1) and includes a connecting support (61). The connecting support (61) has a receiving cavity (62) and a guide groove (63). The reinforcing rib (9) is pushed along the guide groove (63) by the pushing mechanism, so that the upright (4) and the reinforcing rib (9) are inserted and positioned by slot I (41) and slot II (91). The base conveying mechanism (7) is located below the reinforcing rib conveying mechanism (6) and includes a guide support (71). The guide support (71) is provided with a limiting support (75) and a push plate (74). The push plate (74) is driven by the motor IV (73) to move the base II (8) to the positioning position.

2. The welding device for traffic signs with positioning function according to claim 1, characterized in that, The mobile frame (2) includes a sliding support (21), and a motor I (22) is bolted to one side of the sliding support (21). A gear I (23) is welded to the output end of the motor I (22), and the gear I (23) meshes with a rack on one side of the gantry frame (1) for transmission. The sliding support (21) is welded and fixed to the bottom of the mounting frame (24), and the mounting frame (24) is bolted to the bottom of the base I (25). The electric push rod (32) is bolted to the top of the base I (25), and its output end passes through the base I (25) and is welded and fixed to the lifting support (31). The top of the base I (25) is bolted to the support seat (26), and the motor II (33) is bolted to the support seat (26).

3. The welding device for traffic signs with positioning function according to claim 2, characterized in that, The output end of the motor II (33) is welded and fixed with a sleeve rod (34), and a spline shaft (35) is provided in the sleeve rod (34) for sliding fit. The bottom end of the spline shaft (35) is rotatably connected to the lifting support (31) through a bearing. The bottom of the lifting support (31) is provided with two movable supports (36) that slide together. The bottom end of the spline shaft (35) is welded and fixed with gear II (37). The movable support (36) is welded and fixed with rack I (38) on one side. The rack I (38) meshes with gear II (37) for transmission. The rolling wheel (392) is respectively located at the bottom of the two movable supports (36).

4. The welding device for traffic signs with positioning function according to claim 3, characterized in that, The bottom of the movable support (36) is welded and fixed with two extension frames (39). One side of the extension frame (39) is C-shaped. The two extension frames (39) on the same side are rotatably connected by a bearing and a rotating shaft I (391). The rolling wheel (392) is interference-fitted onto the rotating shaft I (391). One of the extended frames (39) is bolted to a motor III (393). The output end of the motor III (393) is connected to the rotating shaft I (391) via a synchronous pulley and a synchronous belt, driving the upright (4) to rotate and change the welding position.

5. The welding device for traffic signs with positioning function according to claim 1, characterized in that, Two guide rods I (64) are slidably provided on one side of the connecting support (61), and a pressure plate (65) is welded and fixed to one end of the guide rod I (64) located in the receiving cavity (62). The outer wall of the guide rod I (64) is fitted with a spring I (66). The two ends of the spring I (66) abut against the outer side of the pressing plate (65) and the inner wall of the receiving cavity (62) respectively. The spring I (66) pushes the pressing plate (65) to press the reinforcing rib (9) tightly.

6. The welding device for traffic signs with positioning function according to claim 5, characterized in that, The pushing mechanism includes a guide rod II (67), which is bolted to one side of the connecting support (61). A movable connecting rod (68) is slidably fitted on its outer wall, and a sliding slider (69) is slidably fitted on the outer wall of the movable connecting rod (68). The top of the sliding block (69) is welded and fixed with a guide rod III (612). The guide rod III (612) passes through the moving link (68) and is fitted with a spring II (611) on its outer wall. The top of the connecting support (61) is bolted and fixed with a multi-stage electric push rod (613), the output end of which is welded and fixed to the moving link (68). The moving link (68) is provided with a striking component striking reinforcement rib (9) to prevent jamming.

7. The welding device for traffic signs with positioning function according to claim 6, characterized in that, The striking assembly includes a fixed support (617), which is bolted to the top of the sliding slider (69), and a striking rod (618) is slidably provided through one side of it. The outer wall of the striking rod (618) is fitted with a spring III (619) and two limiting rings (624). The two ends of the spring III (619) abut against the inner wall of the fixed support (617) and the middle limiting ring (624) respectively. The top of the sliding slider (69) is provided with a driving component, which works with the spring III (619) to drive the striking rod (618) to move back and forth.

8. The welding device for traffic signs with positioning function according to claim 7, characterized in that, The sliding slider (69) is slidably provided with a guide rod IV (621) on one side, and a push block (623) is welded and fixed to one end of the guide rod IV (621). The outer wall of the guide rod IV (621) is fitted with a spring IV (622). The two ends of the spring IV (622) are welded and fixed to one side of the sliding slider (69) and one end of the guide rod IV (621), respectively. The spring IV (622) pushes the reinforcing rib (9) with its elastic force.

9. The welding device for traffic signs with positioning function according to claim 1, characterized in that, The bottom of the guide support (71) is rotatably connected to the screw (72) via a bearing, and the push plate (74) is threadedly fitted onto the screw (72). The bottom of the guide support (71) is provided with a rectangular through hole (76), the top of the push plate (74) passes through the rectangular through hole (76) and abuts against the base II (8), the output end of the motor IV (73) is welded and fixed to the screw (72), and the screw (72) is driven to move the push plate (74).

10. The welding device for traffic signs with positioning function according to claim 8, characterized in that, The driving component includes a rotating shaft II (615), which rotates through the top of the sliding block (69) via a bearing. A toggle rod (616) is welded and fixed to the top of the shaft, and a gear is connected to the bottom of the shaft via a one-way bearing. The top of the connecting support (61) is welded and fixed with a rack II (614). The rack II (614) meshes with the bottom gear of the rotating shaft II (615) to drive the actuating rod (616) to push the limiting ring (624) so ​​that the striking rod (618) reciprocates.

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