Multi-leg steel node welding assembly and method capable of reducing welding deformation and error

Abstract

The present invention belongs to the technical field of steel node welding, and in particular to a multi-leg steel node welding assembly capable of reducing welding deformation and error, comprising a supporting base plate, a column fixedly connected at a center position of the surface of the supporting base plate, and a steel leg arranged at the periphery of the column, wherein a welding steel plate is arranged at the top end of the steel leg, a leg limiting assembly is installed on the surface of the column, the leg limiting assembly comprises an inner sleeve ring, an outer sleeve ring, a fixing column, an outer hollow rod, an adjusting screw, a rotating handle, a first U-shaped block and a clamp, and a circulating hammering assembly is installed at an upper position of the column, the circulating hammering assembly comprises a column, a supporting disc, a second U-shaped block, a striking rod, a striking hammer, a third U-shaped block, a fourth U-shaped block, a nitrogen spring and a toggle plate, which can stably limit the steel leg and the welded steel plate, reduce the welding stress by hammering during the welding process, and effectively control the welding deformation and error.

Description

Technical Field

[0001] The invention belongs to the technical field of steel node welding, and in particular relates to a multi-leg steel node welding assembly and a method capable of reducing welding deformation and error. Background Art

[0002] In the field of modern architecture and engineering, steel structures are increasingly used. As a key connection point in steel structures, the welding quality of multi-leg steel nodes directly affects the stability and safety of the entire structure.

[0003] In the conventional multi-leg steel node welding method, during the welding process, one end of multiple steel legs (generally symmetrically arranged) is generally fixed at a required welding angle so that the multiple steel legs form an integral structure, and then the fixed integral structure is welded to the welding steel plate;

[0004] However, this welding method is difficult to accurately define the position between the multiple fixed steel legs and the welding steel plate, lacks effective positioning measures, and the steel legs are prone to movement or dislocation during welding, resulting in large deviations in the size of the nodes after welding, affecting the assembly accuracy of the structure. At the same time, the high temperature generated during the welding process will cause the metal materials in the weld and the surrounding area to expand and contract thermally, thereby generating welding stress. If these stresses are not eliminated in time, the welding parts are prone to deformation, distortion and other problems, which seriously affect the welding quality. Traditional welding methods often cannot effectively reduce welding stress, making welding deformation and errors difficult to control;

[0005] To solve the same problem, the present application proposes a multi-leg steel node welding assembly and method that can reduce welding deformation and error. Summary of the invention

[0006] To solve the problems raised in the same background technology, the present invention provides a multi-leg steel node welding assembly and method capable of reducing welding deformation and error.

[0007] To achieve the same purpose, the present invention provides the following technical solution: a multi-leg steel node welding assembly capable of reducing welding deformation and error, comprising a supporting base plate, a column fixedly connected to the center of the surface of the supporting base plate, and a steel leg arranged at the periphery of the column, wherein the top of the steel leg is provided with a welded steel plate;

[0008] The surface of the column is provided with a leg limiting assembly, which includes an inner collar, an outer collar, a fixing column, an outer hollow rod, an adjusting screw, a rotating handle, a first U-shaped block and a clamp;

[0009] A cyclic hammering assembly is installed above the column, and the cyclic hammering assembly includes a column, a supporting disc, a second U-shaped block, a striking rod, a striking hammer, a third U-shaped block, a fourth U-shaped block, a nitrogen spring and a toggle plate;

[0010] An adjustment component is also installed between the column and the pole, and the adjustment component includes a first screw rod, a first bevel gear, a second bevel gear, a rotating shaft, a movable square column, a third sliding block and a hand wheel.

[0011] As a preferred multi-leg steel node welding assembly of the present invention that can reduce welding deformation and error, the surface of the column is slidably sleeved with an inner ring, the side surface of the inner ring is rotatably sleeved with an outer ring, the surface of the outer ring is in a circular array and fixedly connected with a plurality of fixed columns, the surface of each of the fixed columns is rotatably connected with an outer hollow rod, the surface of the outer hollow rod is fixedly sleeved with a rotating handle, the inner wall surface of the outer hollow rod is threadedly connected with an adjusting screw, the end of the adjusting screw away from the fixed column is rotatably connected with a first U-shaped block, and the surface of the first U-shaped block is fixedly connected with a clamp.

[0012] As a preferred multi-leg steel node welding assembly of the present invention that can reduce welding deformation and error, the inner wall surface of the inner ring is symmetrically fixedly connected with a first slider, the surface of the column is symmetrically provided with a first slide groove, the first slider is inserted in the first slide groove, the first slider and the column are slidably connected, and the side surface of the inner ring is threadedly connected with a fastening bolt near its bottom surface.

[0013] As a preferred multi-leg steel node welding assembly of the present invention that can reduce welding deformation and error, a vertical pole is arranged above the column, a supporting disk is arranged on the surface of the vertical pole, a second U-shaped block is fixedly connected to the surface of the supporting disk in a circular array near the center position thereof, a striking rod is rotatably connected to the inner wall surface of each second U-shaped block, a striking hammer is fixedly connected to the end of the striking rod, a fourth U-shaped block is fixedly connected to the surface of the supporting disk in a circular array near the outer periphery thereof, the second U-shaped block and the fourth U-shaped block are positioned correspondingly, a third U-shaped block is fixedly connected to the surface of the striking rod, a nitrogen spring is rotatably connected between the third U-shaped block and the fourth U-shaped block, and a toggle disk is arranged at the upper position of the vertical pole.

[0014] As a preferred multi-leg steel node welding assembly of the present invention that can reduce welding deformation and error, a rectangular plate is fixedly connected to the surface of the vertical pole, a driving motor is fixedly installed on the surface of the rectangular plate, an output end of the driving motor is fixedly connected to a first rotating rod, a first gear is fixedly connected to the top of the first rotating rod, a second gear is fixedly connected to the bottom surface of the supporting disc, the second gear is rotatably connected to the vertical pole, and the first gear and the second gear are meshingly connected.

[0015] As a preferred multi-leg steel node welding assembly of the present invention that can reduce welding deformation and error, a limiting ring groove is provided on the surface of the vertical pole, the inner wall surface of the supporting disc is fixedly connected to the limiting ring, the limiting ring is sleeved in the limiting ring groove, and the supporting disc and the vertical pole are rotatably connected.

[0016] As a preferred multi-leg steel node welding assembly of the present invention that can reduce welding deformation and error, a first pulley is fixedly sleeved on the surface of the first rotating rod, a second rotating rod is rotatably connected in the mounting groove opened inside the vertical pole, a second pulley is fixedly sleeved on the surface of the second rotating rod, the first pulley and the second pulley are connected by belt transmission, the top end of the second rotating rod extends to the upper side of the vertical pole and is fixedly connected to a reducer arranged above the vertical pole, and the output shaft of the reducer is fixedly connected to a toggle disk.

[0017] As a preferred multi-leg steel node welding assembly of the present invention that can reduce welding deformation and error, the column is preferably rotatably connected to a first screw rod inside, a first bevel gear is fixedly sleeved on the surface of the first screw rod, a second bevel gear is meshingly connected on the surface of the first bevel gear, a rotating shaft is fixedly connected on the surface of the second bevel gear, the rotating shaft is inserted on the surface of the column and rotatably connected to the column, one end of the rotating shaft extends to the outside of the column and is fixedly connected to a handwheel arranged on the outside of the column, a movable square column is inserted on the surface of the column, the movable square column is slidably connected to the column, a third slider is symmetrically fixedly connected to the surface of the movable square column, the third slider is slidably connected to the column, and the movable square column is threadedly sleeved on the surface of the first screw rod.

[0018] As a preferred multi-leg steel node welding assembly of the present invention that can reduce welding deformation and error, the surface of the nitrogen spring is fixedly connected with an inlet valve and an outlet valve, and the inlet valve and the outlet valve are located on both sides of the surface of the nitrogen spring.

[0019] The present invention also provides a multi-leg steel node welding assembly and method capable of reducing welding deformation and error, comprising the following steps:

[0020] S1. When in use, first place the welding assembly in a horizontal position by supporting the bottom plate, and then place multiple steel legs with fixed bottom ends and fixed welding angles on the outside of the column;

[0021] S2, then loosen the fastening bolts, adjust the position of the inner sleeve ring on the surface of the column so that the steel leg can be just clamped in the clamp, then tighten the fastening bolts, then rotate the outer sleeve ring so that the outer sleeve ring corresponds to the steel leg in the corresponding direction, and at the same time, then loosen the bolts on one side of the clamp in turn, and put the steel leg at the corresponding position into the clamp, and fix the clamp in turn so that the clamp can be fixedly clamped on the surface of the steel leg, and then place the welding steel plate to be welded on the top of the steel leg;

[0022] S3. Then one of the welders presses the welding steel plate downwards. At this time, the welding steel plate squeezes the steel leg. During the squeezing process, the steel leg is subjected to an outward expansion force. At this time, the position of the steel leg can be reinforced by using the limit of the clamp. Then, the welding gun is used to fully weld the outer part of the steel leg in contact with the welding steel plate.

[0023] S4. During the welding process, the driving motor is started to drive the first rotating rod to rotate, and then the first gear is driven to rotate. The first gear is driven to rotate the second gear. The second gear is driven to rotate the supporting disc. The supporting disc is driven to rotate the striking rod. At the same time, the first rotating rod is driven to rotate the second rotating rod through the cooperation of the first pulley, the second pulley and the belt. The second rotating rod is driven to rotate the toggle plate. The toggle plate is driven to intermittently toggle the striking rod to cyclically drive the striking hammer to reciprocate near the welding position.

[0024] S5. When the outer sides of all the steel legs and the welded steel plates are fully welded, release the welded steel plates and stop applying pressure to them. At this time, remove the welded steel plates and the steel legs, and invert the welded steel plates so that the steel legs face upwards. Then use a welding gun to fully weld the inner sides of the steel legs and the welded steel plates.

[0025] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0026] 1. A leg limiter assembly is provided. On the one hand, the welding steel plate and the steel leg are closely fitted by artificial downward pressure, which can ensure the relative position of the two during welding is accurate. The clamp limiter further prevents the steel leg from moving in all directions. Under the joint action, the geometric dimensions of the welding part are more accurate, and the accuracy of the welding node is improved; on the one hand, the high temperature during welding will cause thermal expansion and contraction of the metal, resulting in welding deformation. Artificial downward pressure and clamp limiter can limit this thermal deformation to a certain extent, so that the structural dimensions after welding are closer to the design requirements, reducing the difficulty and cost of subsequent correction work; on the other hand, the method of artificial downward pressure and clamp limiter is relatively simple and easy, does not require complex equipment and technology and redundant anchor limiter points, and is easy for construction personnel to master and operate, thereby improving welding efficiency;

[0027] By providing an inner sleeve ring, an outer sleeve ring, a fixing column, an outer hollow rod, an adjusting screw, a rotating handle, a first U-shaped block and a clamp, before welding, loosen the fastening bolt, adjust the position of the inner sleeve ring on the surface of the column so that the steel leg can be just clamped in the clamp, and then tighten the fastening bolt, and then rotate the outer sleeve ring so that the clamp corresponds to the steel leg in the corresponding direction. At the same time, the bolts on one side of the clamp are loosened in turn, and the steel leg at the corresponding position is put into the clamp, and the clamp is fixed in turn so that the clamp can be fixed on the surface of the steel leg, so that the steel leg can be limited and fixed, and the welding steel plate and the steel leg are closely fitted by artificial downward pressure, which can ensure that the relative position of the two during welding is accurate, and the clamp limit further prevents the steel leg from moving in all directions. Under the joint action, the geometric dimensions of the welding part are more accurate, and the accuracy of the welding node is improved;

[0028] And by using the first slider and the fastening bolt, the height of the clamp can be adjusted according to the fixed inclination angle of the steel leg, so that the clamp can fit with the steel leg. When the clamp fits tightly with the steel leg, the force of the steel leg expanding outward can be more effectively limited. The good fit makes the steel leg in a more stable state during welding, reduces welding defects caused by shaking or slight displacement, such as uneven welds, pores and other problems, and improves welding quality and stability.

[0029] And through the use of the outer hollow rod, the adjusting screw and the rotating handle, the position of the clamp can be adjusted according to the inclination of the steel leg. The adjustable clamp can fit tightly to the steel legs in different inclination states to achieve precise limiting. No matter whether the steel leg is slightly tilted or tilted at a larger angle, the best limiting point can be found by adjusting the position of the clamp to ensure that the steel leg will not move accidentally during the welding process, thereby ensuring the accuracy and stability of the welding position.

[0030] 2. A cyclic hammering component is provided. On the one hand, a large amount of heat is generated during the welding process, resulting in high welding stress in the weld and surrounding areas. Cyclic hammering can cause plastic deformation of the weld metal, release part of the welding stress, and reduce the peak value of the residual stress. This helps to reduce the risk of cracks in the welded parts due to stress concentration during subsequent use. Through hammering, the welding stress can be more evenly distributed, avoiding stress concentration in local areas and improving the overall strength and stability of the welded parts. On the other hand, the mechanical vibration and plastic deformation generated by hammering can break the coarse grains in the weld and refine them. The refined grains can improve the strength and toughness of the weld and improve the mechanical properties of the weld. Hammering can make the pores and slag inclusions in the weld float and discharge, improve the density of the weld, help reduce defects in the weld, and reduce welding errors.

[0031] By arranging a vertical pole, a supporting disc, a second U-shaped block, a striking rod, a striking hammer, a third U-shaped block, a fourth U-shaped block, a nitrogen spring and a toggle plate, the toggle plate is rotated to intermittently drive the striking hammer to hammer the welding steel plate, thereby ensuring that the stress in the welding area and the surrounding area is more evenly eliminated;

[0032] In combination with the use of the first pulley, the second rotating rod, the second pulley, the belt and the reducer, such a setting can make the rotation speed of the toggle disk much lower than the rotation speed of the supporting disk. On the one hand, the striking position is not fixed, so that the stress generated during the welding process can be eliminated more comprehensively. Compared with the fixed striking point, this method can avoid the stress concentration in certain specific areas and make the stress distribution more uniform. Due to the randomness of the striking point, each part of the welded steel plate can be struck to a certain extent, reducing the possibility of excessive local stress, helping to improve the overall strength and stability of the welded part, and reducing the risk of welding deformation due to stress concentration. On the other hand, the unfixed striking point can make the weld metal subject to mechanical vibration and plastic deformation at different positions, further breaking the coarse grains, making the grain refinement more uniform, and helping to improve the strength, toughness and corrosion resistance of the weld. Random striking can cause pores and slag inclusions to float and discharge more effectively in the weld, reducing the generation of welding defects. At the same time, it can also make the weld structure denser, improve the welding quality, and reduce the welding error.

[0033] An adjustment component is provided. On the one hand, no matter how the position of the steel leg on the welding steel plate changes, the striking force of the striking rod is kept consistent by adjusting the position of the striking rod and the deformation of the nitrogen spring, which can ensure that a uniform striking effect can be obtained at different welding positions, reducing the quality difference caused by different welding positions. No matter where the welding is performed, the same striking force can be used to improve the repeatability and consistency of welding. On the other hand, the stable striking force helps to reduce welding deformation and error, thereby reducing the structural safety hazards caused by welding quality problems;

[0034] Through the coordinated use of the first screw rod, the first bevel gear, the second bevel gear, the rotating shaft, the movable square column, the third slider and the hand wheel, when welding steel legs with different inclination angles, once the angle of the striking rod changes, in order to ensure that the striking rod can smoothly hammer the welded steel plate, it is necessary to adjust the height of the striking rod. On the one hand, by adjusting the height position of the striking rod, it can be ensured that the striking rod can still accurately strike the welding part at different angles and deformations, thereby ensuring the consistency of the striking effect; on the other hand, adjusting the height position of the striking rod can make the striking rod always be in the most favorable position to eliminate welding stress, improve weld quality, and reduce welding errors and deformations;

[0035] In conjunction with the air inlet valve and the air outlet valve, when the angle of the striking rod changes, when the amount of nitrogen charged is increased through the air inlet valve, the internal pressure increases, so that when the nitrogen spring is subjected to the same external force, the compression amount is reduced, it exhibits a harder characteristic, and the elastic deformation is relatively reduced; when the nitrogen inside the nitrogen spring is released through the air outlet valve, its internal pressure is reduced, the nitrogen spring is more easily compressed under the same external force, the compression amount is increased, and the elastic deformation is relatively increased. Such a setting can ensure that a uniform striking effect can be obtained at different welding positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0037] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0038] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0039] Figure 3 The overall structure of the present invention is shown in FIG. Figure 3 ;

[0040] Figure 4 The overall structure of the present invention is shown in FIG. Figure 4 ;

[0041] Figure 5 It is a schematic diagram of the overall structure of the leg limiting assembly in the present invention;

[0042] Figure 6 The partial structure diagram of the leg limiting assembly in the present invention is shown in FIG. Figure 1 ;

[0043] Figure 7 The partial structure diagram of the leg limiting assembly in the present invention is shown in FIG. Figure 2 ;

[0044] Figure 8 The partial structure diagram of the leg limiting assembly in the present invention is shown in FIG. Figure 3 ;

[0045] Fig. 9 It is a schematic diagram of the cross-sectional structure of the regulating component in the present invention;

[0046] Fig.10 The overall structure of the cyclic hammer assembly in the present invention is shown in FIG. Figure 1 ;

[0047] Fig.11 The overall structure of the cyclic hammer assembly in the present invention is shown in FIG. Figure 2 ;

[0048] Fig.12 It is a schematic diagram of the connection structure between the striking rod and the nitrogen spring in the present invention;

[0049] Fig.13 It is a schematic diagram of the enlarged structure of the nitrogen spring in the present invention;

[0050] Fig.14 It is a schematic diagram of the position structure of the striking rod and the dial in the present invention;

[0051] Fig.15 A schematic diagram of the connection structure between the first gear and the second gear in the present invention;

[0052] Fig.16 It is a schematic diagram of the split structure of the supporting disc and the vertical pole in the present invention;

[0053] Fig.17 The cross-sectional structure of the neutral pole of the present invention is shown in FIG. Figure 1 ;

[0054] Fig.18 The cross-sectional structure of the neutral pole of the present invention is shown in FIG. Figure 2 ;

[0055] In the figure:

[0056] 1. Support base plate; 2. Column; 3. Steel leg; 4. Welded steel plate; 5. Leg limit assembly; 51. Inner collar; 52. Outer collar; 53. First slider; 54. First slide groove; 55. Fastening bolt; 56. Fixed column; 57. Outer hollow rod; 58. Adjusting screw; 59. Rotating handle; 510. First U-shaped block; 511. Clamp; 6. Circular hammer assembly; 61. Column; 62. Rectangular plate; 63. Driving motor; 64. First rotating rod; 65. First gear; 66. Second gear; 67. Support disc; 68. Limit ring groove ; 69. Limiting ring; 610. Second U-shaped block; 611. Striking rod; 612. Striking hammer; 613. Third U-shaped block; 614. Fourth U-shaped block; 615. Nitrogen spring; 616. First pulley; 617. Second rotating rod; 618. Second pulley; 619. Belt; 620. Reducer; 621. Toggle plate; 7. Adjustment assembly; 71. First screw rod; 72. First bevel gear; 73. Second bevel gear; 74. Rotating shaft; 75. Moving square column; 76. Third slider; 77. Hand wheel; 78. Inlet valve; 79. Exit valve. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] Example: Figure 1-Figure 18 As shown, the present invention provides a technical solution, which can reduce welding deformation and error of a multi-leg steel node welding assembly, comprising a supporting base plate 1, a column 2 fixedly connected to the center of the surface of the supporting base plate 1, and a steel leg 3 arranged on the periphery of the column 2, and a welding steel plate 4 is arranged at the top of the steel leg 3;

[0059] The surface of the column 2 is provided with a leg limiting assembly 5, which includes an inner collar 51, an outer collar 52, a first slider 53, a first slide groove 54, a fastening bolt 55, a fixing column 56, an outer hollow rod 57, an adjusting screw 58, a rotating handle 59, a first U-shaped block 510 and a clamp 511;

[0060] A cyclic hammering assembly 6 is installed at the upper position of the column 2, and the cyclic hammering assembly 6 includes a column 61, a rectangular plate 62, a driving motor 63, a first rotating rod 64, a first gear 65, a second gear 66, a supporting disc 67, a limiting ring groove 68, a limiting ring 69, a second U-shaped block 610, a striking rod 611, a striking hammer 612, a third U-shaped block 613, a fourth U-shaped block 614, a nitrogen spring 615, a first pulley 616, a second rotating rod 617, a second pulley 618, a belt 619, a reducer 620 and a toggle plate 621;

[0061] An adjustment assembly 7 is also installed between the column 2 and the pole 61. The adjustment assembly 7 includes a first screw 71, a first bevel gear 72, a second bevel gear 73, a rotating shaft 74, a movable square column 75, a third slider 76, a hand wheel 77, an air inlet valve 78 and an air outlet valve 79.

[0062] An inner ring 51 is slidably sleeved on the surface of the column 2, and a first slider 53 is symmetrically fixedly connected to the inner wall surface of the inner ring 51. A first slide groove 54 is symmetrically opened on the surface of the column 2, and the first slider 53 is inserted in the first slide groove 54. The first slider 53 and the column 2 are slidably connected. A fastening bolt 55 is threadedly connected to the side surface of the inner ring 51 near its bottom surface. An outer ring 52 is rotatably sleeved on the side surface of the inner ring 51. A plurality of fixing columns 56 are fixedly connected to the surface of the outer ring 52 in a circular array. An outer hollow rod 57 is rotatably connected to the surface of each fixing column 56. A rotating handle 59 is fixedly sleeved on the surface of the outer hollow rod 57. An adjusting screw 58 is threadedly connected to the inner wall surface of the outer hollow rod 57. The end of the adjusting screw 58 away from the fixing column 56 is rotatably connected to the first U-shaped block 510, and a clamp 511 is fixedly connected to the surface of the first U-shaped block 510.

[0063] A vertical rod 61 is arranged above the column 2, and a rectangular plate 62 is fixedly connected to the surface of the vertical rod 61, and a driving motor 63 is fixedly installed on the surface of the rectangular plate 62. The output end of the driving motor 63 is fixedly connected to a first rotating rod 64, and the top of the first rotating rod 64 is fixedly connected to a first gear 65. A supporting disc 67 is arranged on the surface of the vertical rod 61, and a limiting ring groove 68 is provided on the surface of the vertical rod 61. A limiting ring 69 is fixedly connected to the inner wall surface of the supporting disc 67, and the limiting ring 69 is sleeved in the limiting ring groove 68. The supporting disc 67 is rotatably connected to the vertical rod 61, and a second gear 66 is fixedly connected to the bottom surface of the supporting disc 67. The second gear 66 is rotatably connected to the vertical rod 61, and the first gear 65 and the second gear 66 are meshedly connected. A second U-shaped block 610 is fixedly connected to the surface of the supporting disc 67 near its center in a circular array, and a striking rod 611 is rotatably connected to the inner wall surface of each second U-shaped block 610. A striking hammer 612 is fixedly connected to the end of the rod 611, and a fourth U-shaped block 614 is fixedly connected to the surface of the supporting disk 67 near its outer circumference in a circular array. The second U-shaped block 610 and the fourth U-shaped block 614 are located in corresponding positions. A third U-shaped block 613 is fixedly connected to the surface of the striking rod 611, and a nitrogen spring 615 is rotatably connected between the third U-shaped block 613 and the fourth U-shaped block 614. A first pulley 616 is fixedly sleeved on the surface of the first rotating rod 64, and a second rotating rod 617 is rotatably connected in the mounting groove provided in the vertical rod 61. A second pulley 618 is fixedly sleeved on the surface of the second rotating rod 617, and the first pulley 616 and the second pulley 618 are connected by a belt 619. The top end of the second rotating rod 617 extends to the upper side of the vertical rod 61, and is fixedly connected to a reducer 620 provided at a position above the vertical rod 61, and the output shaft of the reducer 620 is fixedly connected to a toggle disk 621.

[0064] It should be noted that the nitrogen spring 615 is a new type of elastic element that uses high-pressure nitrogen as the working medium. It seals the high-pressure nitrogen in a container and uses the compressibility of nitrogen to achieve the function of a spring through the movement of the piston rod in the container. When the piston rod is compressed by an external force, the nitrogen is compressed and stores energy; when the external force disappears, the nitrogen expands, releases energy, and pushes the piston rod to reset;

[0065] The reducer 620 is an independent component consisting of a gear drive, a worm drive, or a gear-worm drive enclosed in a rigid housing. It is often used as a reduction transmission device between the prime mover and the working machine. It plays the role of matching the speed and transmitting the torque between the prime mover and the working machine or the actuator. It is widely used in modern machinery.

[0066] The outer shell surface of the reducer 620 is fixedly connected to the vertical rod 61 through a U-shaped plate (which is the prior art and is not shown in the figure), and the second rotating rod 617 is fixedly connected to the input shaft of the reducer 620;

[0067] The surface of the toggle plate 621 is provided with a plurality of toggle blocks at equal intervals. The toggle plate 621 can push the striking rod 611 to deflect through the toggle blocks during the rotation process. The deflection and reset of the striking rod 611 can be used to perform hammering during welding.

[0068] The adjustable angle of the striking rod 611 can ensure that the striking rod 611 is always in intermittent contact with the dial 621 .

[0069] The interior of the column 2 is rotatably connected with a first screw rod 71, and a first bevel gear 72 is fixedly sleeved on the surface of the first screw rod 71. The surface of the first bevel gear 72 is meshingly connected with a second bevel gear 73, and a rotating shaft 74 is fixedly connected to the surface of the second bevel gear 73. The rotating shaft 74 is inserted on the surface of the column 2 and is rotatably connected to the column 2. One end of the rotating shaft 74 extends to the outside of the column 2 and is fixedly connected to a hand wheel 77 arranged on the outside of the column 2. A movable square column 75 is inserted on the surface of the column 2. The movable square column 75 is slidably connected to the column 2. The movable square column 75 is fixedly connected to the upright pole 61. The surface of the movable square column 75 is symmetrically fixedly connected with a third slider 76. The third slider 76 is slidably connected to the column 2. The movable square column 75 is threadedly sleeved on the surface of the first screw rod 71. The surface of the nitrogen spring 615 is fixedly connected with an inlet valve 78 and an outlet valve 79. The inlet valve 78 and the outlet valve 79 are located on both sides of the surface of the nitrogen spring 615.

[0070] It should be noted that the elastic deformation of the nitrogen spring 615 can be adjusted by increasing or decreasing the amount of nitrogen charged. When the amount of nitrogen charged is increased through the intake valve 78, the internal pressure increases, so that when the nitrogen spring 615 is subjected to the same external force, the compression amount decreases, showing a harder characteristic, and the elastic deformation is relatively reduced;

[0071] When the nitrogen in the nitrogen spring 615 is released through the outlet valve 79, the internal pressure thereof decreases, and the nitrogen spring 615 is more easily compressed under the same external force, the compression amount increases, and the elastic deformation increases relatively.

[0072] The working principle and use process of the present invention are as follows: when in use, firstly, the welding assembly is placed in a horizontal position by supporting the bottom plate 1, and then a plurality of steel legs 3 with fixed bottom ends and fixed welding angles are placed on the outside of the column 2;

[0073] Then, loosen the fastening bolts 55, adjust the position of the inner collar 51 on the surface of the column 2, so that the steel leg 3 can be just clamped in the clamp 511, and adjust the height of the clamp 511 according to the fixed inclination angle of the steel leg 3, so that the clamp 511 can fit the steel leg 3, and then tighten the fastening bolts 55, and then rotate the outer collar 52, so that the clamp 511 corresponds to the steel leg 3 in the corresponding direction, and at the same time, then loosen the bolts on one side of the clamp 511 in turn, and put the steel leg 3 at the corresponding position into the clamp 511, and fix the clamp 511 in turn, so that the clamp 511 can be fixedly clamped on the surface of the steel leg 3, and then place the welding steel plate 4 to be welded on the top of the steel leg 3;

[0074] Then one of the welders presses the welding steel plate 4 downward with force, and the welding steel plate 4 squeezes the steel leg 3. During the squeezing process, the steel leg 3 is subjected to an outward expansion force. At this time, the limit of the clamp 511 is used, and the downward pressure applied by the personnel is cooperated to make the welding steel plate 4 and the steel leg 3 fit tightly, which can ensure that the relative position of the two during welding is accurate. The limit of the clamp 511 further prevents the steel leg 3 from moving in all directions. Under the joint action, the geometric dimensions of the welding part are more accurate. Then, the welding gun is used to fully weld the outer part of the steel leg 3 in contact with the welding steel plate 4.

[0075] During this process, the welder maintains the downward pressure unchanged. When welding, the drive motor 63 is started to run, and the drive motor 63 is used to drive the first rotating rod 64 to rotate, and then drive the first gear 65 to rotate. The first gear 65 rotates and then drives the second gear 66 to rotate. The second gear 66 rotates and then drives the supporting disc 67 to rotate. The support disc 67 rotates and then drives the striking rod 611 to rotate. At the same time, the first rotating rod 64 rotates and drives the second rotating rod 617 to rotate through the cooperation of the first pulley 616, the second pulley 618 and the belt 619. The rotation of the second rotating rod 617 can then drive the toggle plate 621 to rotate at a speed much smaller than the rotation speed of the supporting disc 67 through the reducer 620. The rotation of the toggle plate 621 can then intermittently toggle the striking rod 611 to cyclically drive the striking hammer 612 to move back and forth near the welding position. On the one hand, repeated striking makes the striking position unfixed, so that the stress generated during the welding process can be eliminated more comprehensively. Compared with fixed striking points, this method can avoid stress concentration in certain specific areas and make stress distribution more uniform. Due to the randomness of the striking points, each part of the welded steel plate 4 can be struck to a certain extent, reducing the possibility of excessive local stress, helping to improve the overall strength and stability of the welded parts, and reducing the risk of welding deformation due to stress concentration. On the other hand, the unfixed striking points can make the weld metal subject to mechanical vibration and plastic deformation at different positions, further breaking up coarse grains and making grain refinement more uniform, which helps to improve the strength, toughness and corrosion resistance of the weld. Random striking can cause pores and slag inclusions to float and discharge more effectively in the weld, reducing the occurrence of welding defects. At the same time, it can also make the weld structure denser, improve welding quality, and reduce welding errors;

[0076] When the outer sides of all the steel legs 3 and the welding steel plates 4 are fully welded, release the welding steel plates 4 and stop applying pressure to them. At this time, remove the welding steel plates 4 and the steel legs 3, and invert the welding steel plates 4 so that the steel legs 3 face upwards. Then, use a welding gun to fully weld the inner sides of the steel legs 3 and the welding steel plates 4.

[0077] When it is necessary to weld other steel legs 3 with fixed angles, the above steps are repeated to limit the positions of the steel legs 3 and the welded steel plate 4. The welder then adjusts the position of the striking hammer 612 according to the welding position of the steel legs 3. During the adjustment, when the striking rod 611 rotates toward the outer circumference of the support disc 67, the hand wheel 77 is rotated. The rotation of the hand wheel 77 drives the rotating shaft 74 to rotate. The rotation of the rotating shaft 74 drives the second bevel gear 73 to rotate. The rotation of the second bevel gear 73 drives the first bevel gear 72 to rotate. The rotation of the first bevel gear 72 drives the first screw 71 to rotate. The rotation of the first screw 71 drives the moving square column 75 to rise, so that the striking hammer 612 can contact the bottom surface of the welded steel plate 4. At the same time, the nitrogen in the nitrogen spring 615 is released through the air outlet valve 79, and its internal pressure is reduced. The nitrogen spring 615 is more easily compressed under the same external force, the compression amount is increased, and the elastic deformation is relatively increased.

[0078] When the striking rod 611 rotates toward the center of the supporting disc 67, the hand wheel 77 is rotated in the opposite direction, the hand wheel 77 rotates and then drives the rotating shaft 74 to rotate, the rotating shaft 74 rotates and then drives the second bevel gear 73 to rotate, the second bevel gear 73 rotates and then drives the first bevel gear 72 to rotate, the first bevel gear 72 rotates and then drives the first screw rod 71 to rotate, the first screw rod 71 rotates and then drives the moving square column 75 to lower, so that the striking hammer 612 can contact the bottom surface of the welding steel plate, and at the same time, the nitrogen filling amount is increased through the air inlet valve 78, and the internal pressure is increased, so that When the nitrogen spring 615 is subjected to the same external force, the compression amount is reduced, showing a harder characteristic, and the elastic deformation is relatively reduced. No matter how the position of the steel leg 3 on the welding steel plate 4 changes, the striking force of the striking hammer 612 is kept consistent by adjusting the position of the striking rod 611 and the deformation of the nitrogen spring 615, which can ensure that a uniform striking effect can be obtained at different welding positions, reduce the quality difference caused by different welding positions, and operate at the same striking force no matter where the welding is performed, thereby improving the repeatability and consistency of welding;

[0079] Finally, repeat the above steps to complete the welding between the steel leg 3 and the welding steel plate 4.

[0080] The present invention also provides a multi-leg steel node welding assembly and method capable of reducing welding deformation and error, comprising the following steps:

[0081] S1. When in use, first place the welding assembly in a horizontal position by supporting the bottom plate 1, and then place a plurality of steel legs 3 with fixed bottom ends and fixed welding angles on the outside of the column 2;

[0082] S2, then loosen the fastening bolts 55, adjust the position of the inner sleeve ring 51 on the surface of the column 2, so that the steel leg 3 can be just clamped in the clamp 511, then tighten the fastening bolts 55, then rotate the outer sleeve ring 52, so that the outer sleeve ring 52 corresponds to the steel leg 3 in the corresponding direction, and at the same time, then loosen the bolts on one side of the clamp 511 in turn, and put the steel leg 3 at the corresponding position into the clamp 511, and fix the clamp 511 in turn, so that the clamp 511 can be fixedly clamped on the surface of the steel leg 3, and then place the welding steel plate 4 to be welded on the top of the steel leg 3;

[0083] S3, then one of the welders presses the welding steel plate 4 downwards, and the welding steel plate 4 squeezes the steel leg 3. During the squeezing process, the steel leg 3 is subjected to an outward expansion force. At this time, the position of the steel leg 3 can be reinforced by using the limit of the clamp 511, and then the outer part of the steel leg 3 in contact with the welding steel plate 4 is fully welded by using a welding gun;

[0084] S4. During the welding process, the driving motor 63 is started to run, and the driving motor 63 is used to drive the first rotating rod 64 to rotate, and then the first gear 65 is driven to rotate, the first gear 65 rotates and then drives the second gear 66 to rotate, the second gear 66 rotates and then drives the supporting disc 67 to rotate, the supporting disc 67 rotates and then drives the striking rod 611 to rotate, at the same time, the first rotating rod 64 rotates and drives the second rotating rod 617 to rotate through the cooperation of the first pulley 616, the second pulley 618 and the belt 619, the second rotating rod 617 rotates and then can drive the toggle plate 621 to rotate, the toggle plate 621 rotates and then can intermittently toggle the striking rod 611 to cyclically drive the striking hammer 612 to reciprocate near the welding position;

[0085] S5. When the outer sides of all the steel legs 3 and the welded steel plates 4 are fully welded, release the welded steel plates 4 and no longer apply pressure to them. At this time, remove the welded steel plates 4 and the steel legs 3, and invert the welded steel plates 4 so that the steel legs 3 face upwards. Then use a welding gun to fully weld the inner sides of the contact positions of the steel legs 3 and the welded steel plates 4.

[0086] 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 aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-leg steel node welding assembly capable of reducing welding deformation and error, comprising a support base plate (1), a column (2) fixedly connected to the center of the surface of the support base plate (1), and a steel leg (3) arranged on the periphery of the column (2), wherein a welded steel plate (4) is arranged at the top end of the steel leg (3), characterized in that: A leg limiting assembly (5) is installed on the surface of the column (2), and the leg limiting assembly (5) comprises an inner sleeve ring (51), an outer sleeve ring (52), a fixing column (56), an outer hollow rod (57), an adjusting screw rod (58), a rotating handle (59), a first U-shaped block (510) and a clamp (511); A cyclic hammer assembly (6) is installed above the column (2), the cyclic hammer assembly (6) comprising a column (61), a supporting disc (67), a second U-shaped block (610), a striking rod (611), a striking hammer (612), a third U-shaped block (613), a fourth U-shaped block (614), a nitrogen spring (615) and a toggle plate (621); an adjustment assembly (7) is also installed between the column (2) and the column (61), the adjustment assembly (7) comprising a first screw rod (71), a first bevel gear (72), a second bevel gear (73), a rotating shaft (74), a movable square column (75), a third slider (76) and a hand wheel (77); An inner sleeve (51) is slidably sleeved on the surface of the upright column (2), an outer sleeve (52) is rotatably sleeved on the side surface of the inner sleeve (51), a plurality of fixed columns (56) are fixedly connected to the surface of the outer sleeve (52) in a circular array, an outer hollow rod (57) is rotatably sleeved on the surface of each fixed column (56), a rotating handle (59) is fixedly sleeved on the surface of the outer hollow rod (57), an adjusting screw (58) is threadedly connected to the inner wall surface of the outer hollow rod (57), an end of the adjusting screw (58) away from the fixed column (56) is rotatably connected to a first U-shaped block (510), and a clamp (511) is fixedly connected to the surface of the first U-shaped block (510); The inner wall surface of the inner ring (51) is symmetrically fixedly connected with a first slider (53), the surface of the column (2) is symmetrically provided with a first slide groove (54), the first slider (53) is inserted into the first slide groove (54), the first slider (53) and the column (2) are slidably connected, and a fastening bolt (55) is threadedly connected to the side surface of the inner ring (51) near its bottom surface; A vertical rod (61) is arranged above the column (2); a support disk (67) is arranged on the surface of the vertical rod (61); a second U-shaped block (610) is fixedly connected in a circular array on the surface of the support disk (67) near its center position; a striking rod (611) is rotatably connected to the inner wall surface of each second U-shaped block (610); a striking hammer (612) is fixedly connected to the end of the striking rod (611); a fourth U-shaped block (614) is fixedly connected in a circular array on the surface of the support disk (67) near its outer circumference position; the second U-shaped block (610) and the fourth U-shaped block (614) are located in corresponding positions; a third U-shaped block (613) is fixedly connected on the surface of the striking rod (611); a nitrogen spring (615) is rotatably connected between the third U-shaped block (613) and the fourth U-shaped block (614); and a toggle disk (621) is arranged above the vertical rod (61); A rectangular plate (62) is fixedly connected to the surface of the vertical pole (61), a driving motor (63) is fixedly mounted on the surface of the rectangular plate (62), an output end of the driving motor (63) is fixedly connected to a first rotating rod (64), a top end of the first rotating rod (64) is fixedly connected to a first gear (65), a bottom surface of the supporting disc (67) is fixedly connected to a second gear (66), the second gear (66) is rotatably connected to the vertical pole (61), and the first gear (65) and the second gear (66) are meshingly connected.

2. The multi-leg steel node welding assembly capable of reducing welding deformation and error according to claim 1, characterized in that: A limiting ring groove (68) is provided on the surface of the vertical rod (61), a limiting ring (69) is fixedly connected to the inner wall surface of the supporting disc (67), the limiting ring (69) is sleeved in the limiting ring groove (68), and the supporting disc (67) and the vertical rod (61) are rotatably connected.

3. The multi-leg steel node welding assembly capable of reducing welding deformation and error according to claim 2, characterized in that: A first pulley (616) is fixedly sleeved on the surface of the first rotating rod (64); a second rotating rod (617) is rotatably connected in a mounting groove provided inside the vertical rod (61); a second pulley (618) is fixedly sleeved on the surface of the second rotating rod (617); the first pulley (616) and the second pulley (618) are connected by a belt (619); the top end of the second rotating rod (617) extends to the upper side of the vertical rod (61) and is fixedly connected to a reducer (620) arranged above the vertical rod (61); and the output shaft of the reducer (620) is fixedly connected to a toggle plate (621).

4. The multi-leg steel node welding assembly capable of reducing welding deformation and error according to claim 3, characterized in that: The interior of the column (2) is rotatably connected to a first screw rod (71); a first bevel gear (72) is fixedly sleeved on the surface of the first screw rod (71); a second bevel gear (73) is meshingly connected to the surface of the first bevel gear (72); a rotating shaft (74) is fixedly connected to the surface of the second bevel gear (73); the rotating shaft (74) is inserted into the surface of the column (2) and is rotatably connected to the column (2); one end of the rotating shaft (74) extends to the outside of the column (2) and is arranged A hand wheel (77) is fixedly connected to the outside of the column (2); a movable square column (75) is inserted into the surface of the column (2); the movable square column (75) and the column (2) are slidably connected; the movable square column (75) and the vertical rod (61) are fixedly connected; a third sliding block (76) is symmetrically fixedly connected to the surface of the movable square column (75); the third sliding block (76) and the column (2) are slidably connected; and the movable square column (75) is threadedly sleeved on the surface of the first screw rod (71).

5. The multi-leg steel node welding assembly capable of reducing welding deformation and error according to claim 4, characterized in that: An air inlet valve (78) and an air outlet valve (79) are fixedly connected to the surface of the nitrogen spring (615); the air inlet valve (78) and the air outlet valve (79) are located on both sides of the surface of the nitrogen spring (615).

6. A multi-leg steel node welding method capable of reducing welding deformation and error, characterized in that: Using the welding assembly as claimed in claim 5 comprises the following steps: S1. When in use, first place the welding assembly in a horizontal position by supporting the bottom plate (1), and then place a plurality of steel legs (3) with fixed bottom ends and fixed welding angles on the outside of the column (2); S2, then loosen the fastening bolts (55), adjust the position of the inner ring (51) on the surface of the column (2) so that the steel leg (3) can be just clamped in the clamp (511), then tighten the fastening bolts (55), then rotate the outer ring (52) so that the clamp (511) corresponds to the steel leg (3) in the corresponding direction, and at the same time, then loosen the bolts on one side of the clamp (511) in turn, and put the steel leg (3) at the corresponding position into the clamp (511), and fix the clamp (511) in turn so that the clamp (511) can be fixedly clamped on the surface of the steel leg (3), and then place the welding steel plate (4) to be welded on the top of the steel leg (3); S3, then one of the welders presses the welding steel plate (4) downward with force, and the welding steel plate (4) squeezes the steel leg (3). During the squeezing process, the steel leg (3) is subjected to an outward expansion force. At this time, the position of the steel leg (3) can be reinforced by using the limit of the clamp (511), and then the outer part of the steel leg (3) in contact with the welding steel plate (4) is fully welded by using a welding gun; S4. During the welding process, the driving motor (63) is started to run, and the driving motor (63) is used to drive the first rotating rod (64) to rotate, and then drive the first gear (65) to rotate. The first gear (65) rotates and then drives the second gear (66) to rotate. The second gear (66) rotates and then drives the supporting disc (67) to rotate. The supporting disc (67) rotates and then drives the striking rod (611) to rotate. At the same time, the first rotating rod (64) rotates and drives the second rotating rod (617) to rotate through the cooperation of the first pulley (616), the second pulley (618) and the belt (619). The rotation of the second rotating rod (617) can then drive the toggle plate (621) to rotate. The rotation of the toggle plate (621) can then intermittently toggle the striking rod (611) to cyclically drive the striking hammer (612) to reciprocate near the welding position. S5. When the outer sides of all the steel legs (3) and the welded steel plates (4) are fully welded, the welded steel plates (4) are released and no longer pressurized. The welded steel plates (4) and the steel legs (3) are removed and the welded steel plates (4) are inverted so that the steel legs (3) face upwards. The inner sides of the steel legs (3) and the welded steel plates (4) are fully welded using a welding torch.

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