Welding system for welding steel structure stand column

Abstract

The utility model discloses a welding system for welding a steel structure stand column and relates to the field of welding automation. The utility model solves the problems of difficult rotation of the upright post, long welding time consumption, low welding efficiency and inaccurate rib plate positioning accuracy in the existing traditional upright post welding mode. A welding robot is connected with a welding robot driving unit, a position changing machine is installed on one side of the welding robot, an installation ring is installed on the upper end face of the position changing machine, a rectangular frame is installed in an inner hole of the installation ring, and a position changing clamp is arranged at the position, corresponding to each edge of the rectangular frame, of the installation ring. One end of the displacement clamp is fixedly mounted on the mounting ring, and the other end of the displacement clamp overturns upwards under the action of the mechanical reset structure; the rotating angle of the other end of each displacement clamp is changed by changing the sliding position of one end of each supporting connecting rod in the corresponding slide way connecting rod, and then the size of a space area defined by the four displacement clamps is changed. The device is used for welding the steel structure stand column.

Description

Technical Field

[0001] The utility model relates to the technical field of welding automation, and in particular to a welding system for welding steel structure columns, which is used to improve the efficiency and accuracy of the welding process. Background Art

[0002] Welding and assembly processes are ubiquitous tasks in modern manufacturing and engineering, requiring the precise positioning and fixturing of various metal workpieces. Precise welding and assembly of components is particularly crucial in industries such as aerospace, automotive, construction, and mechanical engineering. Traditionally, these processes have required the use of fixtures to maintain the correct position of the workpieces, ensuring the accuracy and quality of the weld or assembly.

[0003] The aforementioned traditional column welding methods suffer from low production efficiency, high labor intensity, and a low degree of automation. Specifically, the following issues arise: 1) Due to the large overall dimensions of steel columns, typically a square cross-section of 150mm and a height of 1600mm, equivalent to the height of an average adult woman, they are heavy. In this case, traditional column welding methods present difficulties in rotating the columns.

[0004] 2) The number of welds is numerous and the path is complex. Since a steel column has four sides, each side needs to be welded to a rib, and the column also needs to be welded to the base plate, the number of welds required is the sum of the number of welds between the column and the ribs and base plate, and between the ribs and base plate. Traditional welding operations are time-consuming and result in low production efficiency.

[0005] 3) When welding the ribs, manual support is required, which makes it difficult to control the deformation caused by thermal stress, and thus leads to the problem of inaccurate positioning accuracy of the ribs.

[0006] In summary, the existing traditional column welding method has the problems of difficulty in column rotation, long welding time, low welding efficiency and inaccurate rib positioning accuracy. Utility Model Content

[0007] The purpose of the utility model is to solve the problems of difficult column rotation, long welding time, low welding efficiency and inaccurate rib positioning accuracy in the existing traditional column welding method, and thus provide a welding system for welding steel structure columns.

[0008] The technical solution of the utility model is:

[0009] A welding system for welding steel structure columns includes a welding robot, a positioner and a welding robot drive unit. The welding robot is connected to the welding robot drive unit, and the positioner is installed on one side of the welding robot. It also includes a mounting ring, a rectangular frame, four positioner fixtures and four mechanical reset structures. The mounting ring is installed on the upper end surface of the positioner, and the rectangular frame is installed in the inner hole of the mounting ring. A positioner fixture is provided on the mounting ring corresponding to each side of the rectangular frame. One end of the positioner fixture is fixedly mounted on the mounting ring, and the other end of the positioner fixture is flipped upward under the action of the mechanical reset structure to expand the space enclosed by the four positioner fixtures. The space area is formed by the sliding link, and the steel structure column and the base plate are smoothly lifted and lowered in the vertical direction; each mechanical reset structure includes a slide link and a support link, one end of the support link is slidably installed in the slide of the slide link, and the other end of the support link extends upward and is rotatably connected to the other end of the displacement fixture; one end of the slide link is elastically hooked in the middle of one side of the rectangular frame, and the other end of the slide link extends outward to below the middle position in the length direction of the displacement fixture, and the change in the rotation angle of the other end of the displacement fixture is achieved by changing the sliding position of one end of the support link in the slide link, thereby realizing the change in the size of the spatial area enclosed by the four displacement fixtures.

[0010] Furthermore, each displacement clamp includes a displacement frame, a clamping mechanism and an installation assembly. The installation assembly is installed on the installation ring. One end of the displacement frame is rotatably connected to the installation assembly. The clamping mechanism is fixedly installed on the other end of the displacement frame. The other end of the supporting connecting rod is rotatably connected to the lower end surface of the displacement frame.

[0011] Furthermore, the clamping mechanism includes two clamping plates, which are arranged opposite to each other and welded to the other end of the displacement frame, and the distance between the two clamping plates matches the clearance between the outer side surfaces of the ribs.

[0012] Preferably, the two clamping plates are in the shape of right-angled trapezoids, and the right-angled sides are parallel to the outer side surfaces of the steel structure columns.

[0013] Preferably, the upper parts of the two clamping plates are right-angled trapezoids and are provided with right-angled chamfers.

[0014] Furthermore, the mounting assembly includes two T-shaped positioning members, a rotating shaft and a bearing. The two T-shaped positioning members are arranged vertically and parallel, and are rotatably connected to each other through the rotating shaft. The bearing is mounted on the rotating shaft, and one end of the displacement frame is welded to the bearing.

[0015] Furthermore, each mechanical reset structure also includes a pressure spring, which is fixedly mounted on the lower end surface of one end of the slide link.

[0016] Preferably, the pressure spring is a "U"-shaped spring, and the opening length of the "U"-shaped spring is greater than the length of the bottom end surface of the "U"-shaped spring.

[0017] Furthermore, the slide connecting rod is a long strip connecting rod, a slide is provided on the slide connecting rod along the length direction, and an end portion of the slide close to the displacement clamp is provided with an inwardly concave arc-shaped groove.

[0018] Furthermore, each mechanical reset structure also includes a hinged push block, the lower part of the hinged push block is slidably installed in the slideway, and the upper part of the hinged push block is rotatably connected to one end of the support connecting rod.

[0019] Compared with the prior art, the present invention has the following effects:

[0020] 1. The present invention can meet the needs for clamping and automatically resetting rib workpieces in industrial manufacturing. By integrating the steel structure columns 8 and the chassis 9, the positioner 3, and the mechanical reset structure 4, the workpieces (ribs 10 and base 9) can be automatically clamped, vertically lifted (an external handling robot vertically adjusts the welded steel structure columns 8, chassis 9, and ribs 10), and accurately reset (when the next workpiece to be welded is dropped vertically, the positioner 3 and the mechanical reset structure 4 automatically reset themselves), providing an efficient and reliable tool for industrial production.

[0021] The entire welding process does not require manual support of the ribs, which solves the problem of thermal stress deformation of the ribs. When the ribs are clamped by the displacement fixture 3, the positioning accuracy of the ribs is more accurate, effectively improving the welding efficiency.

[0022] 2. The position changing fixture 3 and the mechanical reset structure 4 of the utility model are installed on the positioner. The position changing fixture 3 and the mechanical reset structure 4 are light in weight. Under the rotation action of the positioner, the positions of each weld can be flexibly adjusted during the welding process, thereby further improving the welding efficiency.

[0023] In summary, the utility model effectively reduces the welding deformation of weldments, significantly reduces the labor intensity of workers, has good versatility, and significantly improves the welding quality and welding efficiency of weldments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model; Figure 2 This is a schematic diagram of the structure in which four displacement fixtures 3 and four mechanical reset structures 4 are installed on the mounting ring 6 and the rectangular frame 7. At this time, it is the initial state of welding; Figure 3 is a schematic diagram of the mechanical reset structure 4 in an initial state; Figure 4 This is a schematic diagram of four displacement fixtures 3 and four mechanical reset structures 4 clamping and positioning the steel structure columns, chassis and ribs; Figure 5 yes Figure 4 Schematic diagram after the rib plate 10 is inserted.

[0025] Among them: 1. Welding robot; 2. Positioner; 3. Positioning fixture; 4. Mechanical reset structure; 5. Welding robot drive unit; 6. Mounting ring; 7. Rectangular frame; 8. Steel structure column; 9. Bottom plate; 10. Rib plate; 11. Block plate;

[0026] 31. Positioning frame; 32. Clamping mechanism; 33. Rotating shaft; 34. T-shaped positioning piece; 35. Bearing;

[0027] 41. Pressure spring; 42. Slide connecting rod; 43. Articulated push block; 44. Support connecting rod; 45. Slide. DETAILED DESCRIPTION

[0028] Specific implementation method 1: Combination Figures 1 to 5 Describing this embodiment, this embodiment includes a welding robot 1, a positioner 2 and a welding robot drive unit 5. The welding robot 1 is connected to the welding robot drive unit 5. The positioner 2 is installed on one side of the welding robot 1. It also includes a mounting ring 6, a rectangular frame 7, four positioner fixtures 3 and four mechanical reset structures 4. The mounting ring 6 is installed on the upper end surface of the positioner 2. The rectangular frame 7 is installed in the inner hole of the mounting ring 6. A positioner fixture 3 is provided on the mounting ring 6 corresponding to each side of the rectangular frame 7. One end of the positioner fixture 3 is fixedly mounted on the mounting ring 6. The other end of the positioner fixture 3 is flipped upward under the action of the mechanical reset structure 4 to expand the space area enclosed by the four positioner fixtures 3. The steel structure columns 8 and the base plate 9 are smoothly lifted and lowered in the vertical direction; each mechanical reset structure 4 includes a slide link 42 and a support link 44, one end of the support link 44 is slidably installed in the slide of the slide link 42, and the other end of the support link 44 extends upward and is rotatably connected to the other end of the displacement clamp 3; one end of the slide link 42 is elastically hooked in the middle of one side of the rectangular frame 7, and the other end of the slide link 42 extends outward to below the middle position in the length direction of the displacement clamp 3, and the change in the rotation angle of the other end of the displacement clamp 3 is achieved by changing the sliding position of one end of the support link 44 in the slide link 42, thereby achieving the change in the size of the spatial area enclosed by the four displacement clamps 3.

[0029] The welding robot and positioner in this embodiment are arranged longitudinally to ensure the robot has adequate freedom of movement during welding. The positioner is equipped with fixture holes adapted to accommodate columns of varying sizes, accommodating flanges of varying sizes. The ribs can also be precisely positioned to accommodate single-axis or dual-axis eccentricity. A baffle 11 on the work platform controls the flange position, improving welding accuracy and minimizing manual positioning errors. The tilting servo motor is electrically connected to the welding robot's control system, enabling linkage with the robot's other axes.

[0030] Furthermore, the actual welding process of the present invention includes steps such as preparation, welding preparation, welding operation, and welding sequence. During the welding operation, the welding robot's automatic welding is achieved by activating the welding robot control system and setting the welding path and parameters. After welding is completed, the welded area is visually inspected and dimensional measurements are taken to ensure that the weld quality meets the requirements.

[0031] Specific implementation method 2: Combination Figure 2 、 Figure 4 and Figure 5 To describe this embodiment, each displacement clamp 3 of this embodiment includes a displacement frame 31, a clamping mechanism 32 and a mounting assembly. The mounting assembly is mounted on the mounting ring 6. One end of the displacement frame 31 is rotatably connected to the mounting assembly. The clamping mechanism 32 is fixedly mounted on the other end of the displacement frame 31. The other end of the supporting link 44 is rotatably connected to the lower end surface of the displacement frame 31. With this arrangement, the clamping mechanism 32 is mounted on the mounting assembly via the displacement frame 31. When the workpiece needs to be lifted vertically, the clamping mechanism 32 and the displacement frame 31 rotate outward around the rotating axis of the mounting assembly to enlarge the spatial area enclosed by the four displacement clamps 3, and vice versa. The other components and connection relationships are the same as those in the first embodiment.

[0032] Specific implementation method three: Combination Figure 2 、 Figure 4 and Figure 5 To illustrate this embodiment, the clamping mechanism 32 of this embodiment includes two clamping plates, which are arranged opposite to each other and welded to the other end of the displacement frame 31 , and the distance between the two clamping plates matches the clearance between the outer side surfaces of the rib plate 10 .

[0033] This arrangement facilitates the left and right positioning of the rib 10, and the clearance fit also facilitates the clamping mechanism 32 to smoothly clamp the rib without causing significant displacement during the welding process, thereby ensuring the welding accuracy between the rib and the vertical plate. The other components and connection relationships are the same as those of the first or second embodiment.

[0034] Specific implementation method four: Combination Figure 2 、 Figure 4 and Figure 5 To illustrate this embodiment, the two clamping plates of this embodiment are in the shape of right-angled trapezoids, and the right-angled sides are parallel to the outer side surfaces of the steel structure columns 8 .

[0035] This arrangement increases the weight of the clamping mechanism 32, enabling rapid reset. When the base plate and uprights fall vertically and press against the mechanical reset structure 4, one end of the slide link 42 (referred to as the pressure spring 41) is pressed downward, driving the support link 44 to move, which in turn drives the displacement frame 31 downward, achieving reset. The remaining components and connections are the same as those in any of the first to third embodiments.

[0036] Specific implementation method five: Combination Figure 2 、 Figure 4 and Figure 5 To describe this embodiment, the two clamping plates of this embodiment are right-angled trapezoidal shapes, and the upper portions thereof are provided with right-angled chamfers.

[0037] Such a configuration facilitates the rapid installation of the ribs and plays a role in guiding the installation of the ribs. The other components and connection relationships are the same as any one of the specific embodiments 1 to 4.

[0038] Specific implementation method six: combination Figure 2 、 Figure 4 and Figure 5 To illustrate this embodiment, the installation assembly of this embodiment includes two T-shaped positioning members 34, a rotating shaft 33 and a bearing 35. The two T-shaped positioning members 34 are arranged vertically and parallel, and the two T-shaped positioning members 34 are rotatably connected through the rotating shaft 33. The bearing 35 is mounted on the rotating shaft 33, and one end of the displacement frame 31 is welded to the bearing 35.

[0039] With this arrangement, the two T-shaped positioning members 34 can provide positioning and support for the installation of the entire displacement fixture 3, and the bearing 35 rotates around the rotating shaft 33 to ensure the smooth rotation of the displacement frame 31 and the clamping mechanism 32. The other components and connection relationships are the same as any one of the specific embodiments 1 to 5.

[0040] The displacement fixture of this embodiment includes components such as a T-shaped positioning piece, a clamping mechanism, a bearing, a reset mechanism and a pressure spring. The T-shaped positioning piece is cast from cast steel and has good stability and strength. The clamping mechanism is used to clamp the rib weldment to ensure its stability and accuracy during the welding process. The bearing supports the rotation and movement of the displacement fixture. The reset mechanism is used to position the rib weldment to a predetermined position to ensure the accuracy and consistency of the welding process. The pressure spring provides appropriate pressure to ensure that the rib weldment is tightly fixed under the action of the clamping mechanism to avoid movement or shaking during the welding process.

[0041] Specific implementation method seven: combination Figure 3 and Figure 5 To explain this embodiment, each mechanical reset mechanism 4 also includes a pressure spring 41, fixedly mounted on the lower end surface of one end of a slide link 42. This arrangement allows the pressure spring 41 to be hooked onto the middle portion of one side of the rectangular frame 7. When the slide link 42 is not subject to pressure from the base plate, it tilts toward the center of the rectangular frame 7. However, when pressure from the base plate and the steel structure columns is applied, the side of the slide link 42 that was previously in a high position is pressed downward, facilitating the movement of the support link 44. The remaining components and connections are identical to those of any of the first to sixth embodiments.

[0042] Specific implementation method eight: combination Figure 3 and Figure 5 To explain this embodiment, the pressure spring 41 is a U-shaped spring, with the opening length of the U-shaped spring being longer than the bottom end surface. This arrangement allows the slide link 42 to be connected to the lower outer end surface of the opening side of the U-shaped spring in actual use. This connection can be welded, providing a more reliable connection and ensuring that the slide link 42 is initially tilted, allowing the support link 44 to tilt the displacement fixture 3 upward. The remaining components and connections are identical to any of the first through seventh embodiments.

[0043] Specific implementation method nine: combination Figure 3 and Figure 5 To explain this embodiment, the slide link 42 is an elongated rod with a slideway 45 extending along its length. The end of the slideway 45, located near the position-shifting fixture 3, has an inwardly concave arc-shaped groove. This arrangement creates a stepped longitudinal cross-section of the slideway 45. The arc-shaped groove serves to securely engage the hinged push block 43 in its extreme position. The remaining components and connections are identical to those of any of the first through eighth embodiments.

[0044] Specific implementation method ten: Combination Figure 3 and Figure 5 To explain this embodiment, each mechanical reset mechanism 4 also includes a hinged push block 43. The lower portion of the hinged push block 43 is slidably mounted within a slideway 45, and the upper portion of the hinged push block 43 is pivotally connected to one end of a support link 44. This arrangement results in a stepped push block 43 with an arc-shaped protrusion on its lower end. While enabling sliding, the arc-shaped protrusion fits within the arc-shaped groove, acting as a limiter, while the upper portion of the hinged push block 43 serves as a connector. The remaining components and connections are identical to those of any of the first to ninth embodiments.

[0045] Combine Figures 1 to 5 Explain the welding process of the utility model:

[0046] Step 1: After the displacement fixture 3 falls, place the rib plate in the designated position, start the operating program of the control terminal, and perform spot welding in a clockwise or counterclockwise direction (the shortest spot welding path). As an important component of the steel structure column, the rib plate needs to be firmly connected to the steel structure column (hereinafter referred to as the column). Through the spot welding operation, the rib plate can be temporarily fixed to the column so that it can be independently attached to the column without moving or tilting. The key to this step is to ensure that the spot welding position is accurate and the welding quality is good, so as to facilitate subsequent vertical welding and horizontal welding operations, and prevent the problem of welding being stopped due to collision of the gun caused by tilting.

[0047] Step 2: The second step of the welding sequence is to perform horizontal welding. Horizontal welding refers to welding along the horizontal direction of the column and the horizontal direction of the ribs. Its function is to further strengthen the connection between the ribs and enhance the stability and bearing capacity of the overall structure. Try not to reverse the order of vertical welding and horizontal welding. The reason is that horizontal welding strengthens the connection between the ribs. If the column is really offset due to welding gun collision, the accuracy of flange positioning will enable the welding to continue after adjustment, and the clamp will not need to be intervened again like horizontal welding. The horizontal welding operation requires the welder to accurately control the movement trajectory and welding parameters of the welding gun according to the design requirements and welding process parameters to ensure that the welding quality meets the standards.

[0048] Step 3: The third step in the welding sequence is vertical welding. Vertical welding refers to welding performed perpendicular to the columns and ribs. Its purpose is to firmly weld the columns and ribs together, thus forming a stable structure. During vertical welding, the welder needs to precisely control the movement trajectory of the welding gun and the welding parameters according to the design requirements and welding process parameters to ensure the required welding quality.

[0049] Step 4: The welded column needs to be lifted vertically. This operation aims to lift the welded column vertically from the work platform for subsequent handling and transfer. As the column is lifted vertically, the positioner fixture also rises. This is because the column is in contact with the positioner fixture, and the positioner fixture moves with the column. As the column is lifted vertically, the positioner fixture rises with it until contact is eliminated, completing the separation from the column. Next, the pressure spring begins to reset. The pressure spring is compressed during the welding process. Once the column is lifted, the pressure spring returns to its original position, effectively restoring the column. Simultaneously, the column and positioner fixture return to their original positions, driven by the connecting rod and articulated pusher. These connecting rod and articulated pusher are key components of the reset mechanism. With the column lifted and the pressure spring returning, they return the column and fixture to their original positions, preparing for the next work cycle.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A welding system for welding steel structure columns, comprising a welding robot (1), a positioner (2) and a welding robot drive unit (5), wherein the welding robot (1) is connected to the welding robot drive unit (5), and the positioner (2) is installed on one side of the welding robot (1), characterized in that: It also includes a mounting ring (6), a rectangular frame (7), four displacement fixtures (3) and four mechanical reset structures (4). The mounting ring (6) is mounted on the upper end surface of the positioner (2), the rectangular frame (7) is mounted in the inner hole of the mounting ring (6), and a position changing fixture (3) is provided on the mounting ring (6) corresponding to each side of the rectangular frame (7), one end of the position changing fixture (3) is fixedly mounted on the mounting ring (6), and the other end of the position changing fixture (3) is turned upward under the action of the mechanical reset structure (4), thereby expanding the space area enclosed by the four position changing fixtures (3), and realizing the smooth lifting and lowering of the steel structure column (8) and the base plate (9) in the vertical direction; Each mechanical reset structure (4) includes a slide link (42) and a support link (44), one end of the support link (44) is slidably mounted in the slide of the slide link (42), and the other end of the support link (44) extends upward and is rotatably connected to the other end of the displacement fixture (3); One end of the slide link (42) is elastically hooked on the middle of one side of the rectangular frame (7), and the other end of the slide link (42) extends outward to below the middle position of the length direction of the displacement clamp (3). By changing the sliding position of one end of the support link (44) in the slide link (42), the rotation angle of the other end of the displacement clamp (3) is changed, thereby achieving the size change of the space area enclosed by the four displacement clamps (3).

2. The welding system for welding steel structure columns according to claim 1, characterized in that: Each displacement clamp (3) comprises a displacement frame (31), a clamping mechanism (32) and a mounting assembly, wherein the mounting assembly is mounted on the mounting ring (6), one end of the displacement frame (31) is rotatably connected to the mounting assembly, the clamping mechanism (32) is fixedly mounted on the other end of the displacement frame (31), and the other end of the supporting connecting rod (44) is rotatably connected to the lower end surface of the displacement frame (31).

3. The welding system for welding steel structure columns according to claim 2, characterized in that: The clamping mechanism (32) comprises two clamping plates, which are arranged opposite to each other and welded to the other end of the displacement frame (31). The distance between the two clamping plates matches the clearance between the outer side surfaces of the rib plate (10).

4. The welding system for welding steel structure columns according to claim 3, characterized in that: The two clamping plates are in the shape of right-angled trapezoids, and the right-angled sides are parallel to the outer side surfaces of the steel structure columns (8).

5. The welding system for welding steel structure columns according to claim 4, characterized in that: The upper parts of the two clamping plates are right-angled trapezoids and are provided with right-angle chamfers.

6. The welding system for welding steel structure columns according to claim 5, characterized in that: The mounting assembly comprises two T-shaped positioning members (34), a rotating shaft (33) and a bearing (35). The two T-shaped positioning members (34) are arranged vertically and in parallel, and the two T-shaped positioning members (34) are rotatably connected via the rotating shaft (33). The bearing (35) is sleeved on the rotating shaft (33), and one end of the displacement frame (31) is welded to the bearing (35).

7. The welding system for welding steel structure columns according to claim 6, characterized in that: Each mechanical reset structure (4) further comprises a pressure spring (41), which is fixedly mounted on the lower end surface of one end of the slideway connecting rod (42).

8. The welding system for welding steel structure columns according to claim 7, characterized in that: The pressure spring (41) is a "U"-shaped spring, and the opening length of the "U"-shaped spring is greater than the length of the bottom end surface of the "U"-shaped spring.

9. The welding system for welding steel structure columns according to claim 8, characterized in that: The slideway connecting rod (42) is a long strip connecting rod. A slideway (45) is provided along the length direction of the slideway connecting rod (42). An end portion of the slideway (45) close to the displacement clamp (3) is provided with an inwardly concave arc-shaped groove.

10. The welding system for welding steel structure columns according to claim 9, characterized in that: Each mechanical reset structure (4) further comprises a hinged push block (43), the lower portion of which is slidably mounted in a slideway (45), and the upper portion of which is rotatably connected to one end of a supporting connecting rod (44).

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