Semi-automatic welding machine for arc-shaped box girder

Abstract

The utility model discloses a semi-automatic welding machine for an arc-shaped box girder, and belongs to the field of construction equipment. The semi-automatic welding machine for the arc-shaped box girder is used for being installed on the arc-shaped box girder to achieve welding work on the arc-shaped box girder. The semi-automatic welding machine comprises a welding mechanism and a guide mechanism. The welding mechanism is placed on the arc-shaped box girder and used for welding the arc-shaped box girder; the guide mechanism is fixedly installed on the welding mechanism and used for limiting the running route of the welding mechanism. The positions of the guide wheels are adjusted to adapt to box beams with different widths and different curvatures, it is ensured that the welding mechanism can conduct operation along the curves of the box beams, and semi-automatic welding of the arc-shaped box beam assembly welding seam is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of construction equipment, specifically relating to a semi-automatic welding machine for arc-shaped box girders. Background Technology

[0002] In the fabrication of box girder steel beams, straight welds can typically be performed using semi-automatic welding machines. Semi-automatic welding machines excel in straight weld welding due to their high efficiency, stability, and ease of operation, significantly improving welding efficiency and ensuring weld quality. However, for curved welds in curved box girders, conventional semi-automatic welding machines, due to their design limitations, cannot precisely conform to the curved curve. Therefore, welding curved welds often requires manual welding. However, manual welding of curved welds presents several problems. First, manual welding is inefficient and cannot meet the demands of large-scale production. Second, the quality of manual welding is greatly affected by the welder's skill level and operational stability, easily leading to poor weld formation, inconsistent weld leg sizes, and prolonged welding time, resulting in unstable weld quality. This not only affects the fabrication efficiency of curved box girders but may also adversely impact the overall performance and assembly quality of the components. Therefore, a semi-automatic welding machine for welding curved box girders is needed. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies and provide a semi-automatic welding machine for arc-shaped box girders.

[0004] The specific technical solution adopted in this utility model is as follows:

[0005] A semi-automatic welding machine for arc-shaped box girders includes a welding mechanism and a guiding mechanism. The welding mechanism is placed on the arc-shaped box girder to be welded and includes a welding carriage, a welding torch adjustment mechanism, a welding wire support, and a welding wire spool for winding welding wire. The front and rear ends of the welding carriage are respectively provided with hooks for connecting with the guiding mechanism.

[0006] The guiding mechanism includes two identical connecting rods, as well as a first adjusting device, a first guide wheel, a second adjusting device, and a second guide wheel; each connecting rod is fitted with a first limiting block and a second limiting block; the connecting rod is secured to the hooks at the front and rear ends of the welding trolley by the first limiting block and the second limiting block;

[0007] The first adjusting device is sleeved on a connecting rod, and the first adjusting device is provided with a tensioning element for adjusting the tightness; the first guide wheel is fixedly installed below the first adjusting device through a connecting rod; the second adjusting device includes a first fixing block, a second fixing block and an adjusting rod; one end of the first fixing block is sleeved on another connecting rod through an adjustable tensioning element, and the first fixing block and the first adjusting device are located on the same side;

[0008] The adjusting rod is vertically inserted into the first fixing block, forming a sliding connection within the first fixing block; the second fixing block is sleeved on the adjusting rod, forming a sliding connection; both the first and second fixing blocks are provided with tensioning components for fixing the position; the second guide wheel is fixedly installed below the second fixing block via a connecting rod; by adjusting the position of the first adjusting device on the connecting rod, the first guide wheel is made to fit against the side wall of the arc-shaped box girder to be welded, adapting to arc-shaped box girders of different widths; by adjusting the positions of the first fixing block on the connecting rod and the second fixing block on the adjusting rod, the second guide wheel is made to adapt to arc-shaped box girders with different curvatures.

[0009] Preferably, the first limiting block is fixed on the first connecting rod; the second limiting block is slidably connected to the first connecting rod, and the second limiting block is provided with a tensioning element for adjusting the tightness; the relative distance between the first limiting block and the second limiting block is adjusted by the tensioning element to meet the needs of welding trolleys of different sizes.

[0010] Preferably, the welding torch adjustment mechanism includes a vertical pole and a horizontal bar arranged perpendicularly to each other, and a welding torch bracket fixed to the bottom of the vertical pole; the vertical pole and the horizontal bar are connected by a clamp connector; the clamp connector includes a first clamp ring sleeved on the outside of the vertical pole and a second clamp ring sleeved on the outside of the horizontal bar, and both sides of the first clamp ring and the second clamp ring are connected by screws or bolts in a way that allows them to be tightened or loosened.

[0011] Furthermore, the crossbar in the welding torch adjustment mechanism is also connected to the base of the welding wire support via a clamp connector. The clamp connector includes a third clamp ring fitted on the crossbar and a fourth clamp ring fitted on the base of the welding wire support. Both sides of the third clamp ring and the fourth clamp ring are connected by screws or bolts in a way that allows for loosening or tightening. After loosening the screws or bolts on the third clamp ring, the crossbar in the welding torch adjustment mechanism is rotated to adjust the angle between the welding torch support and the horizontal plane in the welding torch adjustment mechanism.

[0012] Preferably, the welding wire support is fixedly mounted on the upper surface of the welding carriage by means of bolts or pins.

[0013] Preferably, the welding wire spool is placed on the welding wire support, and the two ends of the welding wire spool are rotatably connected to the welding wire support.

[0014] Preferably, the hook is made of round steel and is fixedly connected to the welding trolley by bolts or pins.

[0015] Preferably, the tightening element is a ring bolt.

[0016] Preferably, the welding carriage is equipped with a motor to provide power to the entire welding mechanism and adjust the forward speed according to the weld type and depth.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] The semi-automatic welding machine provided by this utility model ensures welding quality during operation through an adjustable welding torch. Guide wheels limit the travel path of the welding carriage, and by adjusting the position of the guide wheels, it can adapt to box girders of different widths and curvatures, ensuring that the welding mechanism can travel along the curve of the arc-shaped box girder, thus achieving semi-automatic welding of the assembly welds of the arc-shaped box girder. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a semi-automatic welding machine for curved box girders installed on a curved box girder, as provided in this embodiment.

[0020] Figure 2 This is a schematic diagram of the welding mechanism provided in this embodiment;

[0021] Figure 3 This is a schematic diagram of the guiding mechanism provided in this embodiment;

[0022] Figure 4 This is a schematic diagram of the installation of the first connecting rod and the hook provided in this embodiment;

[0023] In the figure: welding mechanism 1, welding carriage 11, welding torch adjustment mechanism 12, welding wire holder 13, welding wire spool 14, hook 15, guide mechanism 2, connecting rod 21, first limiting block 211, second limiting block 212, first adjusting device 22, first guide wheel 23, second adjusting device 24, first fixing block 241, second fixing block 242, adjusting rod 243, second guide wheel 25, arc-shaped box girder 3. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Technical features in various embodiments of this utility model can be combined appropriately without conflict.

[0025] In the description of the specific embodiments of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation" and "connection" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. In the description of this invention, it should be understood that the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," and "fourth" may explicitly or implicitly include at least one of those features. Furthermore, the accompanying drawings of the embodiments disclosed in this utility model only involve structures mentioned in the embodiments of this disclosure; other structures can refer to common designs. Where there is no conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0026] like Figure 1 and Figure 2 As shown, in a preferred embodiment of this utility model, this embodiment provides a semi-automatic welding machine for curved box girders, including a welding mechanism 1 and a guiding mechanism 2. The welding mechanism 1 is placed on the curved box girder 3 to be welded, and is used to perform welding work on the curved box girder 3.

[0027] In the device provided in this embodiment, the welding mechanism 1 includes a welding carriage 11, a welding torch adjustment mechanism 12, a welding wire support 13, and a welding wire spool 14 for winding the welding wire. The welding carriage 11 has hooks 15 at its front and rear ends for connection with the guide mechanism 2, which also facilitates movement of the welding carriage 11 by the operator. Because the welding process involves high temperatures, and the hooks 15 need to be attached to the guide mechanism 2, the hooks 15 are made of high-temperature resistant, smooth-surfaced round steel to reduce friction between the hooks 15 and the guide mechanism 2, thereby reducing wear and extending service life. In this embodiment, the hooks 15 can be fixed to both ends of the welding carriage 11 by bolts or pins. In other embodiments, the hooks 15 can also be fixedly connected to the welding carriage 11 by welding or other suitable fixing methods.

[0028] In the device provided in this embodiment, the welding carriage 11 is equipped with a motor, mainly used to provide power to the entire welding equipment, and the forward speed can be adjusted according to the weld type and depth. The welding torch adjustment mechanism 12 includes a vertical pole, a horizontal bar, and a welding torch holder, wherein the vertical pole and the horizontal bar are arranged perpendicularly to each other, and the welding torch holder is fixed to the bottom of the vertical pole. The vertical pole and the horizontal bar are connected by a clamp connector; the clamp connector includes a first clamp ring sleeved on the outside of the vertical pole and a second clamp ring sleeved on the outside of the horizontal bar, and both sides of the first clamp ring and the second clamp ring are connected by screws to form a loose and tight connection. By loosening the screw on the first clamp ring, the vertical pole is moved up and down, thereby adjusting the height of the bottom welding torch holder. By loosening the screw on the second clamp ring, the horizontal bar is moved left and right, thereby adjusting the distance between the welding torch holder and the welding carriage 11.

[0029] The crossbar in the welding torch adjustment mechanism 12 is also connected to the base of the welding wire support 13 via a clamp connector. This clamp connector includes a third clamp ring fitted onto the crossbar and a fourth clamp ring fitted onto the base of the welding wire support 13. Both the third and fourth clamp rings are connected by screws on both sides, allowing for a looser-tight connection. Loosening the screws on the third clamp ring allows rotation of the crossbar in the welding torch adjustment mechanism 12, adjusting the angle between the welding torch holder and the horizontal plane. This adjustment adapts the welding torch holder to the height, angle, and position of the arc-shaped box girder 3 to be welded, ensuring the welding torch is positioned relative to the welding point. This allows the semi-automatic arc-shaped box girder welding machine provided by this invention to adapt to the shape and size of the arc-shaped box girder 3 to be welded, enhancing the adaptability and flexibility of the welding process, while simultaneously improving welding quality and efficiency.

[0030] In the device provided in this embodiment, the welding wire holder 13 is fixedly installed on the welding carriage 11 by bolts. In other embodiments, the welding wire holder 13 can also be fixed on the welding carriage 11 by pins or other means that facilitate installation and disassembly. The welding wire holder 13 has two mounting slots, and the welding wire spool 14 rests in the mounting slots on the welding wire holder 13. Both ends of the welding wire spool 14 are rotatably connected to the welding wire holder. The welding carriage 11 is equipped with a motor, which has two relatively rotating wheels. The two wheels can clamp the welding wire. During the welding process, the motor drives the wheels to rotate, and the rotation pulls the welding wire continuously down from the welding wire spool 14, working in conjunction with the welding torch adjustment mechanism 12 to complete the welding work.

[0031] like Figure 1 and Figure 3 As shown, in a preferred embodiment of this utility model, the guiding mechanism 2 in the device provided in this embodiment includes two connecting rods 21 with identical structures, and each connecting rod 21 is fitted with a first limiting block 211 and a second limiting block 212. Figure 4As shown, the connecting rod 21 is secured to the hooks 15 at both ends of the welding carriage 11 by the first limiting block 211 and the second limiting block 212. The first limiting block 211 is fixed to the connecting rod 21, and the second limiting block 212 forms a sliding connection on the connecting rod 21. The second limiting block 212 is provided with a tensioning element for adjusting the tightness. The relative distance between the second limiting block 212 and the first limiting block 211 is adjusted using the tensioning element to accommodate welding carriages 11 of different sizes. Specifically, the connecting rod 21 is placed on the hook 15, and the second limiting block 212 is slidably or fixedly attached to the connecting rod 21 by adjusting the tensioning element. By adjusting the position of the second limiting block 212, the first limiting block 211 and the second limiting block 212 are located at both ends of the hook 15. At this time, the tensioning element is adjusted to fix the second limiting block 212 on the connecting rod 21. The connecting rod 21 is fixed on the welding trolley 11 by clamping the hook 15 with the first limiting block 211 and the second limiting block 212.

[0032] In the device provided in this embodiment, the guiding mechanism 2 further includes a first adjusting device 22, a first guide wheel 23, a second adjusting device 24, and a second guide wheel 25. The first adjusting device 22 is sleeved on a connecting rod 21, and the first adjusting device 22 is provided with a tensioning element for adjusting the tightness. The first guide wheel 23 is fixedly installed below the first adjusting device 22 by a connecting rod. By adjusting the tensioning element, the position on the connecting rod 21 of the first adjusting device 22 is adjusted to achieve the purpose of adjusting the front and rear position of the first guide wheel 23 relative to the arc-shaped box girder 3 to be welded, so that the first guide wheel 23 fits against the side wall of the arc-shaped box girder 3 to be welded, so as to adapt to box girders of different widths. The second adjusting device 24 includes a first fixing block 241, a second fixing block 242, and an adjusting rod 243. One end of the first fixing block 241 is sleeved on another connecting rod 21 by an adjustable tensioning element, and the first fixing block 241 and the first adjusting device 22 are located on the same side. An adjusting rod 243 is vertically inserted into a first fixing block 241, forming a sliding connection within the first fixing block 241. A tensioning element is provided on the first fixing block 241 to fix the position of the adjusting rod 243. A second fixing block 242 forms a sliding connection with the adjusting rod 243, and the second fixing block 242 is adjustablely fitted onto the adjusting rod 243 via the tensioning element. A second guide wheel 25 is fixedly installed below the second fixing block 242 via a connecting rod. By adjusting the positions of the first fixing block 241 on the connecting rod 21 and the second fixing block 242 on the adjusting rod 243, the second guide wheel 25 can adapt to arc-shaped box girders 3 with different curvatures. In this embodiment, for simple and quick installation and disassembly, a ring bolt can be used as the tensioning element; in other embodiments, other easily adjustable methods can also be used.

[0033] The embodiments described above are merely preferred solutions of this utility model, and are not intended to limit the scope of this utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this utility model. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A semi-automatic welding machine for arc-shaped box girders, characterized in that, It includes welding mechanism (1) and guide mechanism (2);The welding mechanism (1) is placed on the arc box girder (3) to be welded, including welding trolley (11), welding gun adjusting mechanism (12), welding wire support (13) and welding wire disc (14) for winding welding wire;The front and rear ends of the welding trolley (11) are respectively provided with hooks (15) for connecting with the guide mechanism (2); The guide mechanism (2) includes two structurally identical connecting rods (21), and further includes first adjusting device (22), first guide wheel (23), second adjusting device (24) and second guide wheel (25);Each connecting rod (21) is sleeved with first limiting block (211) and second limiting block (212);The connecting rod (21) is clamped on the hooks (15) at the front and rear ends of the welding trolley (11) by the first limiting block (211) and the second limiting block (212); The first adjusting device (22) is sleeved on one connecting rod (21), and the first adjusting device (22) is provided with a tension member for adjusting the tension;The first guide wheel (23) is fixedly installed below the first adjusting device (22) through a connecting rod;The second adjusting device (24) includes first fixed block (241), second fixed block (242) and adjusting rod (243);One end of the first fixed block (241) is sleeved on the other connecting rod (21) through an adjustable tension member, and the first fixed block (241) and the first adjusting device (22) are located on the same side; The adjusting rod (243) is vertically inserted into the first fixed block (241), and the adjusting rod (243) is slidably connected in the first fixed block (241);The second fixed block (242) is sleeved on the adjusting rod (243) to form a sliding connection;The first fixed block (241) and the second fixed block (242) are both provided with a tension member for fixing the position;The second guide wheel (25) is fixedly installed below the second fixed block (242) through a connecting rod;By adjusting the position of the first adjusting device (22) on the connecting rod (21), the first guide wheel (23) is adapted to the sidewall of the arc box girder (3) to be welded, and the arc box girder (3) of different widths is adapted;By adjusting the position of the first fixed block (241) on the connecting rod (21) and the second fixed block (242) on the adjusting rod (243), the second guide wheel (25) is adapted to the arc box girder (3) of different curvatures.

2. The semi-automatic box girder welding machine according to claim 1, characterized in that, The first limiting block (211) is fixed on the first connecting rod (21);The second limiting block (212) is slidably connected on the first connecting rod (21), and the second limiting block (212) is provided with a tension member for adjusting the tension;The relative distance between the first limiting block (211) and the second limiting block (212) is adjusted by the tension member to satisfy the welding trolley (11) of different sizes.

3. The semi-automatic box girder welding machine according to claim 1, characterized in that, The welding gun adjusting mechanism (12) comprises a vertical rod and a horizontal rod arranged perpendicularly to each other and a welding gun bracket fixed at the bottom of the vertical rod; the vertical rod and the horizontal rod are connected through a hoop connector; the hoop connector comprises a first hoop ring sleeved on the periphery of the vertical rod and a second hoop ring sleeved on the periphery of the horizontal rod, and the two sides of the first hoop ring and the second hoop ring are connected in a loose connection mode through screws or bolts.

4. The semi-automatic box girder welding machine according to claim 3, characterized in that, The horizontal rod in the welding gun adjusting mechanism (12) is also connected with the base of the welding wire support (13) through a hoop connector, which comprises a third hoop ring sleeved on the horizontal rod and a fourth hoop ring sleeved on the base of the welding wire support (13), and the two sides of the third hoop ring and the fourth hoop ring are connected in a loose connection mode through screws or bolts; the horizontal rod in the welding gun adjusting mechanism (12) is rotated after the screws or bolts on the third hoop ring are loosened, so as to adjust the included angle between the welding gun bracket in the welding gun adjusting mechanism (12) and the horizontal plane.

5. The semi-automatic box girder welder of claim 1, wherein, The welding wire support (13) is fixedly arranged on the upper surface of the welding trolley (11) in a bolt or pin shaft connection mode.

6. The semi-automatic box girder welder of claim 1, wherein, The welding wire disc (14) is placed on the welding wire support (13), and the two ends of the welding wire disc (14) are rotationally connected with the welding wire support (13).

7. The semi-automatic box girder welder of claim 1, wherein, The hook (15) is made of round steel, and the hook (15) is fixedly connected with the welding trolley (11) through bolts or pin shafts.

8. The semi-automatic box girder welder of claim 1, wherein, The loose member is an annular bolt.

9. The semi-automatic box girder welder of claim 1, wherein, The welding trolley (11) is internally provided with a motor to provide power for the whole welding mechanism (1), and the advancing speed is adjusted according to the type and depth of the weld.

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