Efficient welding method for guardrail steel pipes

Abstract

The invention relates to the technical field of guardrail welding processing, and discloses an efficient welding method for guardrail steel pipes, which comprises the following steps: firstly, driving a trough plate to execute cyclic motion of ascending, advancing, descending and resetting through a feeding mechanism, automatically transferring and arranging the conveyed steel pipes on a plurality of limiting plates at equal intervals, and realizing efficient feeding; then, the adjusting mechanism is used for driving the shear fork type structure to stretch out and draw back, the distance between the limiting plates is synchronously adjusted so as to meet the production requirements of guardrails of different specifications, in the steel pipe transferring process, the deburring mechanism synchronously acts, the two ends of the steel pipe are polished so as to remove burrs, and after steel pipe arrangement, distance adjustment and burr treatment are conducted, the steel pipe is deburred. The positioning mechanism compresses and laterally limits the steel pipe, and finally welding is completed through the welding mechanical arm. According to the whole process, automatic feeding, flexible distance adjustment, online deburring and precise positioning welding are integrated, and the welding efficiency, adaptability and product quality are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of guardrail welding technology, and in particular to a high-efficiency welding method for guardrail steel pipes. Background Technology

[0002] Steel pipe railing processing refers to the process of using steel pipes as the core raw material and processing them into railing products with protective functions through a series of procedures such as steel pipe cutting, conveying, positioning, spacing adjustment, end treatment, and welding. It is widely used in roads, bridges, factories, and other scenarios. Among them, the welding of railing steel pipes is a key process to ensure the structural strength and safety performance of the railing. At present, there are several problems in the production process of railing steel pipe welding processing that need to be solved, which seriously affect production efficiency and product quality.

[0003] The existing production process for welding guardrail steel pipes generally suffers from several problems, including reliance on manual operation in multiple stages, insufficient equipment adaptability, and lagging process handling. Specifically, the feeding process still relies mainly on manual labor, which is not only labor-intensive and inefficient, but also prone to uneven spacing of steel pipes due to inconsistent operation, thus affecting the subsequent welding quality. Furthermore, the lack of a spacing adjustment system makes it difficult to flexibly adapt to the production requirements of different specifications and models of guardrail products, limiting the versatility and flexibility of the production line.

[0004] In addition, after the steel pipe cutting process, metal burrs often remain at the ends. If these burrs are not removed in time, they will cause defects such as loose joints and excessive weld gaps during the welding process, which will seriously weaken the welding strength of the guardrail and the durability of the overall structure, ultimately affecting its safety performance and service life. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing technology has the disadvantages of low degree of automation of material feeding, poor flexibility of spacing adjustment, lag in end burr treatment and insufficient positioning accuracy. To this end, we propose an efficient welding method for guardrail steel pipes.

[0006] To achieve the above objectives, this application employs the following efficient welding method for guardrail steel pipes, comprising the following steps:

[0007] S1. Automated Equidistant Feeding: The feeding mechanism drives the long plate and the trough plate on top to perform a cyclical motion of rising, moving forward, falling, and resetting, so as to transfer the steel pipes conveyed by the steel pipe conveyor belt sequentially and at equal intervals and arrange them on multiple limit plates on the top of the support plate.

[0008] S2. Flexible spacing adjustment: The scissor structure is extended and retracted by the adjustment mechanism, which simultaneously changes the spacing between all limit plates to accommodate steel pipes of different specifications of guardrails.

[0009] S3. Synchronous deburring: During the process of the channel plate lifting the steel pipe forward, the deburring mechanism drives the grinding plate to fit against both ends of the steel pipe, and uses the friction of the moving steel pipe to grind both ends to remove burrs.

[0010] S4. Positioning and Welding: After the steel pipes are arranged and the spacing is adjusted, the steel pipes on the limiting plate are pressed down and laterally limited and fixed by the positioning mechanism. Then, the welding robot arm welds the contact parts between the steel pipes.

[0011] Preferably, in step S1, the specific operation process of the feeding mechanism is as follows:

[0012] The motor drives the gear to rotate, which in turn drives the frame plate fixed to the gear to rotate. The frame plate pushes the slide rod to move vertically upward, horizontally forward, vertically downward, and horizontally backward along the U-shaped groove on the right-angle plate. The slide rod drives the long plate and the groove plate to move synchronously through the sliding parts to complete the cyclic action of lifting the steel pipe, transferring the steel pipe, placing the steel pipe, and resetting.

[0013] Preferably, in step S2, the specific operation process of the adjusting mechanism is as follows:

[0014] The electric push rod starts the movement, pushing and pulling the second sliding column at the front end to slide along the long groove at the bottom of the support plate. The second sliding column drives the first sliding column connected to it to move, forcing the scissor structure formed by the interlocking first and second scissor rods to extend and retract as a whole. The first sliding column drives all the limiting plates to move synchronously and proportionally through the sliding plate to achieve spacing adjustment.

[0015] Preferably, in steps S3 and S4, the cooperation process between the deburring mechanism and the positioning mechanism is as follows:

[0016] During the process of the trough plate lifting the steel pipe from the support plate to the limiting plate, the hydraulic rod pushes the L-shaped plate and the grinding plate inward, so that the grinding plate contacts both ends of the steel pipe for grinding;

[0017] After all the steel pipes are arranged and positioned, the first telescopic rod pushes the pressure plate down, so that its two sides are inserted into the slots at the top of the limiting plate, and together with the V-shaped limiting plate, they clamp the steel pipes. At the same time, the L-shaped plate provides lateral limiting for the steel pipes.

[0018] A high-efficiency welding method for guardrail steel pipes is achieved through the following high-efficiency welding device for guardrail steel pipes.

[0019] A high-efficiency welding device for guardrail steel pipes includes a support plate, on both sides of which a housing is fixedly connected, a welding robotic arm is installed at the middle of the top of the housing, long plates are provided on both sides of the support plate, a number of grooved plates are fixedly connected to the top of the long plates, and a number of limiting plates are provided on the top of the support plate.

[0020] The housing is equipped with a feeding mechanism. The feeding mechanism causes the trough plate to rise and lift the steel pipe, then move the steel pipe forward to the top of the limiting plate and then lower it to place the steel pipe on the top of the limiting plate. Finally, the trough plate moves back to the initial position to complete the equidistant forward arrangement and feeding of the steel pipe.

[0021] An adjustment mechanism is installed on the top of the support plate and operates in conjunction with the feeding mechanism. The adjustment mechanism uses a scissor-type structure to extend and retract to change the distance between multiple limiting plates, thereby achieving proportional adjustment of the spacing between the multiple limiting plates.

[0022] The deburring mechanism is connected to the feeding mechanism so that the two ends of the steel pipe are ground when the trough plate drives the steel pipe forward, so as to reduce the burrs and unevenness at both ends of the steel pipe and avoid the welds being weak due to gaps when the guardrail steel pipe is welded longitudinally and laterally.

[0023] The positioning mechanism restricts the position of the steel pipe after it has been loaded into place, ensuring that the steel pipe fits tightly during welding to reduce gaps in the weld.

[0024] Preferably, the feeding mechanism includes:

[0025] A Y-shaped plate is fixedly connected to the rear side of a limiting plate. A support plate is fixedly connected to the rear side of the limiting plate. The support plate and the limiting plate are at the same height. The height of the Y-shaped plate is lower than that of the support plate. A steel pipe conveyor belt is provided at one end of the housing. A right-angle plate is fixedly connected inside the housing. A U-shaped groove is opened on one side of the right-angle plate. A sliding rod is slidably connected to the inner wall of the U-shaped groove. A gear is rotatably connected to the middle of the right-angle plate. A chain is meshed between the two gears. A motor is fixedly connected to the top of the right-angle plate. The output end of the motor is fixedly connected to one side of the gear. A frame plate is fixedly connected to one side of the gear. The inner wall of the frame plate is fitted onto the surface of the sliding rod. A sliding element is rotatably connected to the surface of the sliding rod. The top of the sliding element is fixedly connected to the bottom of the long plate. A T-shaped plate is fixedly connected to the top of the right-angle plate. A sliding shell is slidably connected to the surface of the T-shaped plate. One side of the sliding element is slidably connected to the inner wall of the sliding shell.

[0026] Preferably, the adjustment mechanism includes:

[0027] An electric actuator is fixedly connected to the bottom of a support plate. The support plate has an elongated groove on its surface. A first sliding post is located at the bottom of a limiting plate. A first scissor bar is rotatably connected to the surface of the first sliding post, and a second scissor bar is rotatably connected to the surface of the first sliding post. The first and second scissor bars are staggered and rotate via the first sliding post. Both ends of the first scissor bar are rotatably connected to the ends of adjacent second scissor bars via pivots. A second sliding post is fixedly connected to the bottom of the first sliding post. The rearmost end of the second sliding post is rotatably connected to the rear side of the support plate, and the bottom of the frontmost end of the second sliding post is fixedly connected to the output end of the electric actuator. A limiting groove is formed inside the housing. A sliding plate is slidably connected to the inner walls of the two limiting grooves. The bottom of the limiting plate is fixedly connected to the sliding plate, and the bottom of the sliding plate is fixedly connected to the top of the first sliding post.

[0028] Preferably, the deburring mechanism includes:

[0029] Two L-shaped plates are distributed on the top of two housings. Two hydraulic rods are fixedly connected to one side of each housing. The output end of each hydraulic rod is fixedly connected to one side of the L-shaped plate. A grinding plate is fixedly connected to the top of the other side of the L-shaped plate.

[0030] Preferably, the positioning mechanism includes

[0031] The first telescopic rod, there are two first telescopic rods and both are fixedly connected to the top of the support plate by brackets. The output ends of the bottom of the two first telescopic rods are fixedly connected to a pressure plate. The top of the limiting plate has slots on both sides. The two sides of the pressure plate are inserted into the inner wall of the slot. One side of the L-shaped plate is fixedly connected to a baffle.

[0032] Preferably, the right-angle plate has a guide groove inside, the guide groove is connected to the U-shaped groove, and one end of the slide rod is fixedly connected to a circular plate, the circular plate being slidably connected to the inner wall of the guide groove.

[0033] Preferably, the top of both the limiting plate and the support plate is a V-shaped structure, and the initial position of the groove plate is aligned with the initial position of the limiting plate but at different heights.

[0034] The technical effects and advantages of this invention are as follows:

[0035] In this invention, steel pipes are conveyed to a Y-shaped plate via a steel pipe conveyor belt. The feeding mechanism drives the long plate and the trough plate to move the steel pipes equidistantly to the limiting plate. The adjustment mechanism drives the electric push rod to extend and retract the first and second scissor rods to adjust the distance between the limiting plates to meet production requirements. During feeding, the hydraulic rod pushes the L-shaped plate and the grinding plate to grind both ends of the steel pipe. After reaching the position, the first telescopic rod pushes the pressure plate to cooperate with the limiting plate to clamp the steel pipe. The baffle limits the deviation. Finally, the welding robot arm welds the steel pipe. After completion, the feeding mechanism lifts the finished product and moves it out.

[0036] In this invention, after the steel pipes are conveyed to the Y-shaped plate by the steel pipe conveyor belt, the motor-driven gear of the feeding mechanism rotates, causing the slide bar to perform a cyclical motion of lifting-forward-lowering-resetting along the U-shaped groove. Then, the steel pipes are lifted by the long plate and the groove plate, and the steel pipes are moved one by one to the top of the limiting plate at equal intervals and arranged. The whole process does not require manual placement of steel pipes one by one, avoiding spacing errors caused by manual feeding. It realizes the automated feeding of vertical arrangement of guardrail steel pipes, greatly shortens the feeding time, and improves the overall production efficiency.

[0037] In this invention, the electric push rod of the adjusting mechanism pushes the second sliding column to slide along the long groove, causing the first scissor bar and the second scissor bar to extend and retract alternately, simultaneously changing the spacing of multiple limiting plates. The sliding plate slides along the limiting groove to assist the limiting plates in stabilizing displacement, thereby achieving proportional spacing adjustment of the limiting plates. This can adapt to the requirements of different types of guardrails for steel pipe spacing, improving the versatility and production flexibility of the device.

[0038] In this invention, when the feeding mechanism lifts the steel pipe forward, the hydraulic rod pushes the L-shaped plate to move, so that the grinding plate fits against both ends of the steel pipe, and the friction of the moving steel pipe completes the deburring. After the steel pipe is arranged in place, the first telescopic rod pushes the pressure plate to insert into the slot, and the V-shaped structure of the limiting plate clamps the steel pipe. At the same time, the baffle restricts the steel pipe from shifting. The burr cleaning is completed simultaneously during the feeding process, avoiding weld gaps caused by uneven ends. Combined with precise positioning, the fit of the steel pipe during welding is ensured, improving the weld strength of the guardrail and the product quality. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0040] Figure 2 This is a sectional view of the vertical cross-section structure of the present invention;

[0041] Figure 3 This is a bottom view of the bottom structure of the present invention;

[0042] Figure 4 This is an exploded view of the bottom structure of the present invention;

[0043] Figure 5 This is an exploded view of the positions and structures of the first and second scissor arms of the present invention;

[0044] Figure 6 This is an exploded view of part of the conveying mechanism of the present invention;

[0045] Figure 7 This is a partial structural cross-sectional view of the conveying mechanism of the present invention.

[0046] Legend: 1. Support plate; 2. Shell; 3. Welding robotic arm; 4. Long plate; 5. Slot plate; 6. Limiting plate; 7. Y-shaped plate; 8. Pallet; 9. Steel pipe conveyor belt; 10. Right-angle plate; 11. U-shaped slot; 12. Sliding rod; 13. Gear; 14. Chain; 15. Motor; 16. Frame plate; 17. Sliding component; 18. T-shaped plate; 19. Sliding shell; 20. Electric push rod; 21. Long slot; 22. First sliding column; 23. First scissor bar; 24. Second scissor bar; 25. Second sliding column; 26. Limiting slot; 27. Slide plate; 28. L-shaped plate; 29. ​​Hydraulic rod; 30. Grinding plate; 31. First telescopic rod; 32. Pressure plate; 33. Slot; 34. Baffle; 35. Guide slot; 36. Circular plate. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the invention in a schematic manner, and therefore only show the components relevant to the invention.

[0048] Reference Figure 1 - Figure 7 As shown, the present invention provides a high-efficiency welding method for guardrail steel pipes, comprising the following steps:

[0049] S1. The feeding mechanism drives the long plate 4 and the trough plate 5 on top to perform a cycle of rising, advancing, falling and resetting, so as to move the steel pipes conveyed by the steel pipe conveyor belt 9 sequentially and at equal intervals and arrange them on the multiple limiting plates 6 on the top of the support plate 1.

[0050] Among them, reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, housings 2 are fixedly connected to both sides of the support plate 1. A welding robotic arm 3 is installed at the middle of the top of the housing 2. Long plates 4 are provided on both sides of the support plate 1. Several slotted plates 5 are fixedly connected to the top of the long plates 4. Several limiting plates 6 are provided on the top of the support plate 1.

[0051] The feeding mechanism is installed inside the housing 2, and the feeding mechanism includes:

[0052] Y-shaped plate 7 is fixedly connected to the rear side of limiting plate 6. A support plate 8 is fixedly connected to the rear side of limiting plate 6. The support plate 8 and limiting plate 6 are at the same height. The height of Y-shaped plate 7 is lower than that of support plate 8. A steel pipe conveyor belt 9 is provided at one end of housing 2. A right-angle plate 10 is fixedly connected inside housing 2. A U-shaped groove 11 is opened on one side of the right-angle plate 10. A slide rod 12 is slidably connected to the inner wall of the U-shaped groove 11. A gear 13 is rotatably connected to the middle of the right-angle plate 10. A chain 14 is meshed between the two gears 13. A motor 15 is fixedly connected to the top of the right-angle plate 10. The output end of the motor 15 is fixedly connected to one side of the gear 13. A frame plate 16 is fixedly connected to one side of the gear 13. The inner wall of the frame plate 16 is fitted onto the surface of the slide rod 12. A sliding member 17 is rotatably connected to the surface of the slide rod 12. The top of the sliding member 17 is fixedly connected to the bottom of the long plate 4. A T-shaped plate 18 is fixedly connected to the top of the right-angle plate 10. A sliding shell 19 is slidably connected to the surface of the T-shaped plate 18. One side of the sliding member 17 is slidably connected to the inner wall of the sliding shell 19. The steel pipe conveyor belt 9 transports steel pipes to the Y-shaped plate 7. After the steel pipes are transported to the top of the Y-shaped plate 7 by the steel pipe conveyor belt 9, the steel pipe conveyor belt 9 stops running. At this time, one steel pipe remains at the top of the Y-shaped plate 7. Then the conveying mechanism starts to run. First, the motor 15 drives the gear 13 to rotate clockwise. Then, the chain 14 drives another gear 13 to rotate clockwise synchronously. This causes the frame plate 16 to rotate synchronously when the gear 13 rotates. Since the frame plate 16 is at the lower left corner of the U-shaped groove 11 at this time, when... When the frame plate 16 rotates clockwise, the frame plate 16 will first push the slide rod 12 upward along the vertical groove of the inner wall of the U-shaped groove 11. During this process, the position of the slide rod 12 rises and simultaneously drives the sliding member 17 to move upward. At the same time, the sliding member 17 slides upward along the long rod of the inner wall of the sliding shell 19. The position of the sliding member 17 rises and simultaneously drives the long plate 4 and the groove plate 5 to rise in height. Since the initial height of the long plate 4 and the groove plate 5 is lower than the top position of the Y-shaped plate 7, the steel pipe placed on the surface of the Y-shaped plate 7 will be lifted upward when the long plate 4 and the groove plate 5 on both sides rise.

[0053] At this time, the frame plate 16 rotates to the upper left corner of the right angle plate 10. Then, the continuous operation of the motor 15 will drive the gear 13 to rotate clockwise. When the frame plate 16 deflects forward at the top, it will drive the slide rod 12 to slide forward along the straight groove at the top of the U-shaped groove 11. This will cause the slide rod 12 to move forward, drive the slide member 17 to move forward, and pull the sliding shell 19 to slide forward along the surface of the T-shaped plate 18. This will cause the frame plate 16 to deflect to the upper right corner of the U-shaped groove 11, so as to complete the forward movement of the long plate 4 and the groove plate 5.

[0054] During this process, the long plate 4 and the slot plate 5 first rise and lift the steel pipe on the surface of the Y-shaped plate 7 away from the Y-shaped plate 7 and move forward. Then, the slot plate 5 lifts the steel pipe forward to the top area of ​​the support plate 8. After that, the motor 15 continues to run and drives the frame plate 16 to deflect to the lower right corner position, so that the slide rod 12 slides along the U-shaped slot 11 into the bottom straight slot. This process reduces the height of the long plate 4 and the slot plate 5. As the slot plate 5 descends, the steel pipe on its surface is placed on the surface of the support plate 8. Then, the motor 15 continues to run and drives the slide rod 12 to slide along the bottom straight slot of the U-shaped slot 11 to the initial position.

[0055] Then the steel pipe conveyor belt 9 runs again to transport a steel pipe to the surface of the Y-plate 7. Then the gear 13 runs again. However, at this time, there is a steel pipe on the surface of both the Y-plate 7 and the support plate 8. This makes the long plate 4 lift the two steel pipes on the surface of the Y-plate 7 and the support plate 8 at the same time when it rises for the first time. Then the long plate 4 moves forward and drives the two steel pipes to move forward synchronously. When the long plate 4 descends, the steel pipe that was originally placed on the surface of the Y-plate 7 moves to the support plate 8. The steel pipe placed on the support plate 8 will move forward to the surface of the limit plate 6.

[0056] With the repeated operation of the motor 15 and the steel pipe conveyor belt 9, the steel pipes conveyed by the steel pipe conveyor belt 9 will be evenly arranged on the top of multiple limit plates 6 each time. According to the production needs of the guardrail, the staff can operate the conveyor to move a specified number of steel pipes to the top of the limit plates 6 to complete the vertical arrangement of the guardrail steel pipes, realize the automated feeding of steel pipe guardrails, and provide a good foundation for the subsequent welding process.

[0057] S2. The scissor structure is extended and retracted by the adjustment mechanism, and the spacing between all limit plates 6 is changed synchronously to accommodate steel pipes of different specifications of guardrails.

[0058] Among them, reference Figure 3 - Figure 5 As shown, the adjustment mechanism is installed on the top of the support plate 1 and operates in conjunction with the feeding mechanism. The adjustment mechanism includes:

[0059] An electric push rod 20 is fixedly connected to the bottom of a support plate 1. A long groove 21 is formed on the surface of the support plate 1. A first sliding post 22 is provided at the bottom of a limiting plate 6. A first scissor bar 23 is rotatably connected to the surface of the first sliding post 22, and a second scissor bar 24 is rotatably connected to the surface of the first sliding post 22. The first scissor bars 23 and 24 are staggered and rotate via the first sliding post 22. The two ends of the first scissor bar 23 are rotatably connected to the two ends of the adjacent second scissor bar 24 via pivots. A second sliding post 25 is fixedly connected to the bottom of the first sliding post 22. The rearmost second sliding post 25 is rotatably connected to the rear side of the support plate 1, and the bottom of the frontmost second sliding post 25 is fixedly connected to the output end of the electric push rod 20. A limiting groove 26 is formed inside the housing 2. A sliding plate 27 is slidably connected to the inner walls of the two limiting grooves 26. The limiting plate 6... The bottom of the slide plate 27 is fixedly connected to the bottom of the slide plate 27 and the top of the first slide column 22. The required number of steel pipes will be placed on the surface of the above-mentioned running limit plate 6. At this time, the vertical steel pipes of the guardrail have been arranged. However, the spacing of the steel pipes may vary depending on the model requirements during the production process of the guardrail. To meet this production requirement, the adjustment device will be activated. The electric push rod 20 will first move forward to push the foremost second slide column 25. This causes the foremost second slide column 25 to slide forward along the long groove 21. The last second slide column 25 is rotatably connected to the back of the support plate 1, so that its position will never move. Since the second scissor bar 24 and the first scissor bar 23 are arranged in a scissor-like manner, as the second slide column 25 moves forward, the second slide column 25 will pull the foremost first slide column 22 forward and drive the first scissor bar 23 and the second scissor bar 24 to move.

[0060] During this process, due to the change in the spacing of the first sliding column 22, the first scissor bar 23 and the second scissor bar 24 will also deflect through the first sliding column 22, causing the overall scissor structure to expand and contract, thereby changing the distance between adjacent first sliding columns 22. The first sliding column 22 is fixedly connected to the sliding plate 27. When the first sliding column 22 moves forward, the sliding plate 27 will slide forward in the limiting groove 26. The sliding plate 27 is also fixed to the bottom of the limiting plate 6, so that the limiting plate 6 will eventually move. During this process, the limiting plate 6 except the last one will move at equal distances, so that the limiting plate 6 can adjust the arrangement spacing of the steel pipes placed on its surface, thereby meeting the requirements of the steel pipe arrangement spacing during the production of different models of guardrails, completing the precise adjustment of the steel pipe arrangement spacing, and ensuring that the subsequent welding work can be carried out smoothly according to the production standards of different models of guardrails.

[0061] S3. During the process of the channel plate 5 lifting the steel pipe forward, the deburring mechanism drives the grinding plate 30 to fit against both ends of the steel pipe, and uses the friction of the moving steel pipe to grind both ends to remove burrs.

[0062] Among them, reference Figure 1 , Figure 2 and Figure 3 As shown, the deburring mechanism includes:

[0063] Two L-shaped plates 28 are located on the top of the two housings 2. Two hydraulic rods 29 are fixedly connected to one side of the housing 2, and the output ends of the hydraulic rods 29 are fixedly connected to one side of the L-shaped plates 28. A grinding plate 30 is fixedly connected to the top of the other side of the L-shaped plates 28. When the groove plate 5 lifts the first steel pipe placed on top of the support plate 8 and conveys it forward, the steel pipe on top of the support plate 8 moves forward to the limit plate 6. During this process, the hydraulic rods 29 on both sides will first drive the L-shaped plates 28. The steel pipe is placed on both sides of the tray 8 and the limiting plate 6 by moving inward. The grinding plates 30 on both sides protrude slightly from the L-shaped plate 28. The inward movement of the L-shaped plate 28 will cause the grinding plates 30 to slightly fit against the sides of the steel pipe on the tray 8. This will cause the steel pipe placed on the top of the tray 8 to slide along the surface of the grinding plates 30 when it rises and is lifted by the groove plate 5. The steel pipe will move upward by contacting the surface of the grinding plates 30, so as to use the grinding plates 30 to grind the two ends of the steel pipe, thereby reducing the burrs on both sides of the steel pipe.

[0064] Afterwards, the hydraulic rod 29 moves the L-shaped plate 28 away. When the steel pipe at the Y-shaped plate 7 moves to the support plate 8, the hydraulic rod 29 will move the L-shaped plate 28 closer to the steel pipe at the support plate 8 to prepare for the next deburring process of the newly fed steel pipe. After all the fed steel pipes have been deburred and are evenly arranged and the spacing is adjusted, the workers place the two horizontal steel pipes of the guardrail on the bottom inner side of the support plate 8. Then, the hydraulic rod 29 pushes the L-shaped plate 28 to make the horizontal steel pipes close to the two sides of the vertical steel pipes, ensuring close contact at the weld joints. Finally, the welding robotic arm 3 welds the steel pipe contact joints to complete one guardrail production. After welding, the clamping limit on the guardrail steel pipes is released, and the conveying mechanism moves to lift the long plate 4 and the channel plate 5 and stop. The long plate 4 and the channel plate 5 lift the welded guardrail and move it out from inside the limit plate 6. After that, the workers take out the welded guardrail, and the device will prepare for the next guardrail production.

[0065] S4. After the steel pipes are arranged and the spacing is adjusted, the steel pipes on the limiting plate 6 are pressed down and laterally limited and fixed by the positioning mechanism. Then, the welding robotic arm 3 welds the contact parts between the steel pipes.

[0066] Among them, reference Figure 1 - Figure 3 As shown, the positioning mechanism includes:

[0067] There are two first telescopic rods 31, both of which are fixedly connected to the top of the support plate 1 by brackets. The output ends of the bottom of the two first telescopic rods 31 are fixedly connected to the pressure plate 32. The top of the limiting plate 6 has slots 33 on both sides. The two sides of the pressure plate 32 are inserted into the inner wall of the slots 33. A baffle 34 is fixedly connected to one side of an L-shaped plate 28. When the steel pipe is transported to the Y-shaped plate 7 by the steel pipe conveyor belt 9, the steel pipe will be unable to move forward by the steel pipe conveyor belt 9 because one end is restrained by the baffle 34, so as to avoid the steel pipe falling off the surface of the Y-shaped plate 7. Then, by the inward movement of the L-shaped plate 28 and the hydraulic rod 29, the baffle 34 can push the steel pipe on the surface of the Y-shaped plate 7 to the other side, so as to avoid the steel pipe being exposed too much on the surface of the Y-shaped plate 7, and ensure that the long plate 4 and the channel plate 5 can accurately push the steel pipe to move when running.

[0068] After the required steel pipes are evenly arranged on the surface of the limiting plate 6 and the distance between the steel pipes has been adjusted, the first telescopic rod 31 can move downward to push the pressure plate 32 close to the top of the limiting plate 6, and make the pressure plate 32 insert into the slot 33. The pressure plate 32 presses down on the surface of the steel pipe, and works with the limiting plate 6 to clamp the steel pipe to prevent the steel pipe from moving up and down during welding, thus ensuring the stability of the steel pipe during welding. During the welding process, the L-shaped plate 28 uses the hydraulic rod 29 to bring the horizontal steel pipe close to both sides of the vertical steel pipe. However, when welding the guardrail, since the horizontal steel pipe and the vertical steel pipe may use steel pipes of different diameters, the placement height of the horizontal steel pipe and the vertical steel pipe may be different. The horizontal steel pipe may be higher than the vertical steel pipe, which may cause the center point of the vertical steel pipe and the horizontal steel pipe to deviate.

[0069] At this time, the conveying mechanism can drive the long plate 4 and the trough plate 5 to move upward, and lift the steel pipe placed on the surface of the limiting plate 6. Then, according to the height of the horizontal steel pipe, the limiting plate 6 and the vertical steel pipe are controlled to rise to the required position, and then the contact point between the vertical steel pipe and the horizontal steel pipe is adjusted to change the height difference of welding, so as to ensure that the steel pipes are on the same horizontal line during welding and to ensure the accuracy of welding.

[0070] Furthermore, refer to Figure 7As shown, the right-angle plate 10 has a guide groove 35 inside, which is connected to the U-shaped groove 11. One end of the slide rod 12 is fixedly connected to a circular plate 36, which is slidably connected to the inner wall of the guide groove 35. When the frame plate 16 deflects and drives the slide rod 12 to slide along the inner wall of the U-shaped groove 11, the slide rod 12 moves and drives the circular plate 36 to slide synchronously along the inner wall of the guide groove 35. The guide groove 35 is larger than the inner wall of the U-shaped groove 11, so that the circular plate 36 is embedded in the guide groove 35 to slide, ensuring that the slide rod 12 will not come out of the U-shaped groove 11. At the same time, the slide rod 12 is restricted in the guide groove 35 by the circular plate 36, so that the angle of the slide rod 12 will not change and the position will not tilt when the slide rod 12 slides, thus ensuring the stability of the slide rod 12 when it slides and avoiding the shaking of the long plate 4 and the groove plate 5 when they move.

[0071] Furthermore, refer to Figure 2 As shown, the tops of both the limiting plate 6 and the support plate 8 are V-shaped structures. The initial position of the channel plate 5 is aligned with the initial position of the limiting plate 6, but the heights are different. Because the tops of the limiting plate 6 and the support plate 8 are designed with V-shaped structures, this unique design can accurately position the guardrail steel pipe. When the guardrail steel pipe is placed inside the V-shaped structure, its bottom will naturally fit into the recess of the V-shaped structure, thus ensuring that the steel pipe will not be displaced in the horizontal direction. The initial position of the channel plate 5 is aligned with the initial position of the limiting plate 6, but the heights are different. This height difference design is to adapt to the welding requirements of guardrail steel pipes of different specifications. During the feeding process, it ensures that the channel plate 5 is aligned with the limiting plate 6 after each movement and stop, ensuring the stability of the channel plate 5 when moving and supporting the steel pipe for feeding.

[0072] Furthermore, refer to Figure 2 As shown, the sliding distance of the slide rod 12 along the inner wall of the U-shaped groove 11 is equal to the distance between the initial positions of the two adjacent limiting plates 6. By limiting the distance of the slide rod 12 along the inner wall of the U-shaped groove 11, it is ensured that the distance between the groove plate 5 and the limiting plate 6 is equal each time the groove plate 5 moves, ensuring that each steel pipe can be accurately moved to the predetermined position, thereby improving the accuracy and consistency of welding.

[0073] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for high efficiency welding of guardrail steel pipes, characterized by, The method comprises the following steps: S1, automatic equidistance feeding: through the feeding mechanism driving the long plate (4) and the groove plate (5) on the top of the long plate (4) to perform the cycle movement of lifting, advancing, descending and resetting, the steel pipes conveyed by the steel pipe conveying belt (9) are sequentially and equidistantly transferred and arranged on the plurality of limiting plates (6) on the top of the supporting plate (1); S2, flexible spacing adjustment: through the adjusting mechanism driving the scissor type structure to stretch and retract, the spacing between all the limiting plates (6) is synchronously changed to adapt to the steel pipes of different specifications of guardrails; S3, synchronous deburring: in the process that the groove plate (5) holds the steel pipe to advance, through the deburring mechanism driving the polishing plate (30) to adhere to the two ends of the steel pipe, the friction of the movement of the steel pipe is utilized to polish the two ends of the steel pipe to remove the burrs; S4, positioning and welding: after the arrangement and spacing adjustment of the steel pipes are completed, through the positioning mechanism, the steel pipes on the limiting plates (6) are pressed down and laterally limited and fixed, then the welding mechanical arm (3) welds the contact parts between the steel pipes.

2. The method for high efficient welding of guardrail steel pipe according to claim 1, characterized in that: In the step S1, the specific operation process of the feeding mechanism is as follows: Through the motor (15) driving the gear (13) to rotate, the frame plate (16) fixed with the gear (13) is driven to rotate, the frame plate (16) drives the sliding rod (12) to sequentially perform the track movement of vertical lifting, horizontal advancing, vertical descending and horizontal retreating along the back-shaped groove (11) on the right angle plate (10), the sliding rod (12) drives the long plate (4) and the groove plate (5) to move synchronously through the sliding part (17), so as to complete the cycle actions of holding the steel pipe, transferring the steel pipe, placing the steel pipe and resetting.

3. The method according to claim 2, characterized in that: In the step S2, the specific operation process of the adjusting mechanism is as follows: Through the electric push rod (20) to start, the second sliding column (25) at the front end is pushed and pulled to slide along the long groove (21) at the bottom of the supporting plate (1), the second sliding column (25) drives the first sliding column (22) connected therewith to move, so that the first scissor lever (23) and the second scissor lever (24) connected in an interlaced manner constitute the scissor type structure to stretch and retract as a whole, the first sliding column (22) drives all the limiting plates (6) to move synchronously and proportionally through the sliding plate (27), so as to realize the spacing adjustment.

4. The method according to claim 3, characterized in that: In the steps S3 and S4, the cooperation process of the deburring mechanism and the positioning mechanism is as follows: In the process that the groove plate (5) holds the steel pipe to move from the supporting plate (8) to the limiting plate (6), the hydraulic rod (29) pushes the L-shaped plate (28) and the polishing plate (30) to move inward, so that the polishing plate (30) contacts the two ends of the steel pipe to polish; After all the steel pipes are arranged and positioned, the first telescopic rod (31) pushes the pressing plate (32) to press down, so that the two sides of the pressing plate (32) are inserted into the insertion grooves (33) at the top of the limiting plates (6), and the pressing plate (32) clamps the steel pipe together with the limiting plates (6) of the V-shaped structure, at the same time, the L-shaped plate (28) laterally limits the steel pipe.

5. The method for high efficient welding of guardrail steel pipe according to any one of claims 1-4, characterized in that: The supporting plate (1) is fixedly connected with the shell (2) on both sides, the welding mechanical arm (3) is installed at the middle of the top of the shell (2), the long plate (4) is arranged on both sides of the supporting plate (1), the top of the long plate (4) is fixedly connected with a plurality of groove plates (5), and a plurality of limiting plates (6) are arranged on the top of the supporting plate (1). The feeding mechanism is installed inside the shell (2), the adjusting mechanism is installed on the top of the support plate (1) and cooperates with the feeding mechanism, and the deburring mechanism is in transmission connection with the feeding mechanism.

6. The method for high efficient welding of guardrail steel pipe according to claim 5, characterized in that: The feeding mechanism comprises: A Y-shaped plate (7) is fixedly connected to the rear side of the limiting plate (6), the rear side of the limiting plate (6) is fixedly connected with a supporting plate (8), the supporting plate (8) is at the same height as the limiting plate (6), the height of the Y-shaped plate (7) is lower than that of the supporting plate (8), one end of the shell (2) is provided with a steel pipe conveying belt (9), the inside of the shell (2) is fixedly connected with a right-angle plate (10), one side of the right-angle plate (10) is provided with a back-shaped groove (11), the inner wall of the back-shaped groove (11) is slidably connected with a sliding rod (12), the middle part of the right-angle plate (10) is rotatably connected with a gear (13), the two gears (13) are in meshing connection with a chain (14), the top of the right-angle plate (10) is fixedly connected with a motor (15), the output end of the motor (15) is fixedly connected with one side of the gear (13), one side of the gear (13) is fixedly connected with a frame plate (16), the inner wall of the frame plate (16) is sleeved on the surface of the sliding rod (12), the surface of the sliding rod (12) is rotatably connected with a sliding piece (17), the top of the sliding piece (17) is fixedly connected with the bottom of the long plate (4), the top of the right-angle plate (10) is fixedly connected with a T-shaped plate (18), the surface of the T-shaped plate (18) is slidably connected with a sliding shell (19), one side of the sliding piece (17) is slidably connected with the inner wall of the sliding shell (19). The top of the limiting plate (6) and the top of the supporting plate (8) are both V-shaped structures, and the initial position of the groove plate (5) is aligned with the initial position of the limiting plate (6) but has different heights.

7. The method according to claim 6, wherein the method is characterized by: The adjusting mechanism comprises: The utility model provides an electric push rod (20) is fixedly connected to the bottom of support board (1), the surface of support board (1) is seted up long groove (21), the bottom of limiting plate (6) is provided with first slide post (22), the surface of first slide post (22) is rotatably connected with first scissor lever (23), the surface of first slide post (22) is rotatably connected with second scissor lever (24), first scissor lever (23) and second scissor lever (24) are staggered distribution between and rotatable through first slide post (22), and the both ends of first scissor lever (23) are rotatably connected with the both ends of adjacent second scissor lever (24) through pivot, the bottom of first slide post (22) is fixedly connected with second slide post (25), and the rear side of support board (1) is rotatably connected with the last end of second slide post (25), and the bottom of the first end of second slide post (25) is fixedly connected with the output end of electric push rod (20), the inside of shell (2) is seted up limiting groove (26), and the inner wall of two limiting groove (26) is slidably connected with slide plate (27), and the bottom of limiting plate (6) is fixedly connected with slide plate (27), and the bottom of slide plate (27) is fixedly connected with the top of first slide post (22).

8. The method for high efficient welding of guardrail steel pipe according to claim 7, characterized in that: The deburring mechanism comprises: The L-shaped plate (28) is two in number and is arranged on the top of the two shells (2), the shell (2) is fixedly connected with two hydraulic rods (29) on one side, the output end of the hydraulic rod (29) is fixedly connected with the L-shaped plate (28) on one side, and the top of the other side of the L-shaped plate (28) is fixedly connected with the polishing plate (30).

9. The method according to claim 8, characterized in that: The positioning mechanism comprises: The first telescopic rod (31) is two in number and is fixedly connected to the top of the support plate (1) through a support, and the output end of the bottom of the two first telescopic rods (31) is fixedly connected with the pressing plate (32), the top of the limiting plate (6) is provided with the insertion slot (33) on both sides, the two sides of the pressing plate (32) are inserted into the inner wall of the insertion slot (33), and one side of the L-shaped plate (28) is fixedly connected with the baffle (34).

10. The method of claim 6, wherein the method is characterized by: The inside of the right-angle plate (10) is provided with the guide groove (35), the guide groove (35) is communicated with the back-to-back groove (11), one end of the slide rod (12) is fixedly connected with the circular plate (36), and the circular plate (36) is slidably connected to the inner wall of the guide groove (35).

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