Positioning and welding device for mounting road sign

Abstract

The invention discloses a positioning and welding device for mounting a road sign, relates to the technical field of welding equipment, and solves the technical problems of risk, high efficiency, low efficiency, large occupied space and long construction period in the existing technical scheme at present, the positioning and welding device comprises a main machine body, and a clamping structure is arranged on the lower wall surface of the main machine body; according to the multi-degree-of-freedom mechanical arm welding machine, the multi-degree-of-freedom mechanical arm welding machine is firmly fixed to the stand column through a clamping structure, follow-up positioning, alignment and welding work are all automatically completed through the multi-degree-of-freedom mechanical arm, and safety accidents such as high-altitude falling and electric shock are completely eradicated; the life safety of constructors is guaranteed; according to the device, the automatic positioning and welding functions are integrated, and the manual process which originally needs multi-person cooperation and consumes long time is converted into standardized machine operation; and the installation time of a single sign is greatly shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding equipment, in particular to a positioning and welding device for installing a road sign. BACKGROUND

[0002] The present application relates to a road sign welding installation device, as an important part of urban traffic infrastructure, its installation quality and efficiency are directly related to the smoothness of traffic management and public safety. The traditional road sign installation, especially when adding or repairing the column on the built road, usually relies on the aerial work platform combined with manual operation.

[0003] The operator needs to ride the aerial work bucket or climb the scaffold, and hold heavy tools such as electric welder and angle grinder in the narrow and unstable high-altitude environment for positioning and welding. This not only requires high physical and skill of the operator, but also has great safety risks in high-altitude operation, such as personnel falling, tools falling and hurting people, etc. The process of manual aiming at the welding point and adjusting the welding posture is time-consuming and laborious, resulting in low overall construction efficiency. In the high-altitude environment, affected by wind, limited vision and personnel fatigue, the quality of manual welding is difficult to guarantee. The uniformity, depth and strength of the weld often have great differences, and the consistency is poor. Such unstable welding quality will affect the firmness of the connection between the sign and the column, and may have safety hazards in bad weather (such as strong wind and heavy rain), and shorten the service life of the sign. Due to the low efficiency of manual operation, the installation of a single sign often takes a long time. During this period, the aerial work platform needs to occupy part of the lane, often causing traffic congestion, especially on the main roads of cities with heavy traffic. The long construction period not only increases the pressure of traffic diversion, but also brings higher comprehensive cost.

[0004] In summary, the current manual high-altitude welding method widely used in the field of road sign installation has a series of problems to be solved, such as high safety risk, low operation efficiency, unstable welding quality, and traffic influence in the construction process. Therefore, it is of great practical significance and market demand to develop a special device that can replace manual work and realize automatic, precise and safe installation and welding, in order to improve the quality and efficiency of road infrastructure construction, protect the safety of construction personnel and reduce traffic congestion. The present technical solution is proposed in this background.

[0005] In summary, the current technical solution has the technical problems of high risk, low efficiency and large space occupation, and long construction period. SUMMARY

[0006] In view of the deficiencies of the prior art, the positioning welding device for road sign installation provided by the present application solves the technical problems of high risk, low efficiency, large space occupation and long construction period of the prior art.

[0007] To achieve the above object, the present application is implemented by the following technical scheme: a positioning welding device for road sign installation, comprising a main body, a clamping structure is arranged on the lower wall of the main body, a lower turntable is rotatably installed on the upper wall of the main body, a lower hinge connecting frame is fixedly installed on the lower turntable, a fixed arm is rotatably installed on the lower hinge connecting frame, a telescopic arm is slidably installed on the fixed arm, a rotating swing arm structure is arranged on the telescopic arm, and a welding work head is arranged on the rotating swing arm; the main body is the base of the whole device, used for installation of components and determination of zero position; the clamping structure is located below the main body, which tightly clamps the telegraph pole or the sign post like human hands, and fixes the whole device in the air; the lower turntable, the lower hinge connecting frame, the fixed arm and the telescopic arm together constitute a multi-degree-of-freedom mechanical arm; the lower turntable is responsible for horizontal rotation, the lower hinge connecting frame and the fixed arm are responsible for pitching, and the telescopic arm is responsible for forward and backward telescoping; the rotating swing arm structure and the welding work head; the rotating swing arm structure can more finely adjust the posture and angle of the welding head, and the welding work head is the tool for executing the welding task.

[0008] Preferably, the clamping structure comprises a pair of sliding frames, a pair of damping turntables are rotatably installed in the sliding frames respectively, arc-shaped clamping blocks are arranged in the damping turntables, two pairs of sliding rails are fixedly installed on the lower wall of the main body, a pair of the sliding frames are slidably installed on the sliding rails respectively, the sliding rails are electric rails, a pair of synchronous gears are rotatably installed on a pair of the sliding frames, a pair of racks are arranged on a pair of the sliding frames, and the synchronous gears are meshed and connected with the racks respectively; the electric sliding rails drive the sliding frames to move, realizing the clamping and loosening actions. The device can be adapted to different thicknesses of the post; the synchronous gears and the racks; the function is to ensure that the moving speed and distance of the left and right sliding frames are completely consistent when clamping or loosening, realizing synchronous opening and closing; ensuring that the center of the device is always aligned with the center of the post, avoiding the device from being skewed due to clamping deviation; the arc-shaped clamping blocks are used to better fit the round post, increase the contact area, and clamp more stably; the damping turntables allow the arc-shaped clamping blocks to have a slight self-adaptive rotation when clamping, so that the device can better adapt to the posts with irregular surfaces, further enhancing the reliability of the fixation.

[0009] Preferably, a rotating motor is arranged in the main body, a driving gear is fixedly installed on the driving end of the rotating motor, a driven gear ring is fixedly installed on the lower wall of the lower turntable, and the driving gear is meshed and connected with the driven gear ring; the rotating motor provides power, and drives the driven gear ring fixed with the lower turntable through the driving gear. The mechanical arm is more stable and controllable when rotating.

[0010] Preferably, a lower swing motor is fixedly installed on the lower hinged connecting frame, and a driving end of the lower swing motor is fixedly connected to a side wall surface of one end of the fixed arm; by controlling the rotation of the motor, the height and angle of the welding head in the vertical direction can be accurately adjusted to adapt to welding points of different heights.

[0011] Preferably, an extension motor and a gear reducer are fixedly installed on the fixed arm, a lead screw is rotatably installed on the fixed arm, the lead screw is fixedly connected to an output end of the gear reducer, an input end of the gear reducer is fixedly connected to a driving end of the extension motor, a threaded block is fixedly installed on the telescopic arm, and the lead screw is threadedly connected to the threaded block; after the extension motor rotates, the rotation of the lead screw is driven after speed reduction and force increase by the gear reducer. Since the threaded block on the telescopic arm is threadedly connected to the lead screw, the rotational movement of the lead screw will be converted into the linear movement of the telescopic arm, the transmission is stable, the positioning is accurate, and the telescopic arm has self-locking property.

[0012] Preferably, the rotating swing arm structure comprises a swing arm motor, an upper swing motor, an upper turntable, and an upper swing arm, the swing arm motor is fixedly installed at a front end of the extension arm, the upper turntable is fixedly installed at a driving end of the swing arm motor, the upper swing motor is fixedly installed on an upper wall surface of the upper turntable, the upper swing arm is fixedly connected to a driving end of the upper swing motor, and the welding work head is arranged at a front end of the upper swing arm; the swing arm motor and the upper turntable are responsible for rotation in the horizontal direction; the upper swing motor and the upper swing arm are responsible for swinging in the vertical direction, can further accurately approach the welding site, and can be folded for storage to reduce space.

[0013] Preferably, a fine adjustment motor is fixedly arranged at the front end of the upper swing arm, and the welding work head is rotatably installed at a driving end of the fine adjustment motor; the function of the motor is to make the welding head itself rotate to achieve the best welding effect.

[0014] Preferably, the telescopic arm is a I-shaped beam body, and a guide limiting block is arranged at a front end of the fixed arm; the telescopic arm designed in the I-shaped form provides maximum bending and torsion resistance; the guide limiting block provides guidance for the sliding of the telescopic arm, ensures the stability of the linear movement of the telescopic arm, plays a limiting role, prevents the telescopic arm from sliding out of the range of the fixed arm, and increases safety.

[0015] Preferably, the sliding frame is provided with reinforcing ribs, and the sliding frame is an L-shaped frame.

[0016] Beneficial effects: the present invention provides a positioning welding device for road sign installation, the present invention is firmly fixed on the column through the clamping structure, the subsequent positioning, alignment and welding work are all completed by the multi-degree-of-freedom mechanical arm automation, which eliminates the occurrence of safety accidents such as high-altitude falling and electric shock, and guarantees the life safety of construction personnel; the device integrates automatic positioning and welding functions, changes the original manual process which needs multi-person cooperation and consumes long time into standardized machine operation; the installation time of single sign is greatly shortened, thereby reducing the occupation and influence on road traffic; the mechanical arm is positioned through precise motor and transmission mechanism, the influence of human factors on welding quality is eliminated, the connection strength and durability of the sign are reliably guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a first three-dimensional structure schematic view of the positioning welding device for road sign installation of the present invention.

[0018] Figure 2 It is a second three-dimensional structure schematic view of the positioning welding device for road sign installation of the present invention.

[0019] Figure 3 It is a third three-dimensional structure schematic view of the positioning welding device for road sign installation of the present invention.

[0020] Figure 4 It is a front view structure schematic view of the positioning welding device for road sign installation of the present invention.

[0021] Figure 5 It is a front view structure schematic view of the positioning welding device for road sign installation of the present invention.

[0022] Figure 6 It is a side view structure schematic view of the positioning welding device for road sign installation of the present invention.

[0023] Figure 7 It is a side view structure schematic view of the positioning welding device for road sign installation of the present invention.

[0024] Figure 8 It is a bottom view structure schematic view of the positioning welding device for road sign installation of the present invention.

[0025] In the figure: 1, main body; 2, lower turntable; 3, lower hinge connecting frame; 4, fixed arm; 5, telescopic arm; 6, welding work head; 7, sliding frame; 8, damping turntable; 9, arc-shaped clamping block; 10, sliding rail; 11, synchronous gear; 12, rack; 13, rotating motor; 14, driving gear; 15, driven gear ring; 16, lower swing motor; 17, extension motor; 18, gear reducer; 19, lead screw; 20, threaded block; 21, swing arm motor; 22, upper swing motor; 23, upper turntable; 24, upper swing arm; 25, fine adjustment motor; 26, guide limiting block; 27, reinforcing rib. DETAILED DESCRIPTION

[0026] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined application purposes, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. The detailed description is as follows.

[0027] Please refer to Figures 1-8 The present application provides a technical solution: a positioning and welding device for road sign installation, comprising a main body 1, the lower wall surface of the main body 1 is provided with a clamping structure, the upper wall surface of the main body 1 is rotatably installed with a lower turntable 2, the lower turntable 2 is fixedly installed with a lower hinge connecting frame 3, the lower hinge connecting frame 3 is rotatably installed with a fixed arm 4, the fixed arm 4 is slidably installed with a telescopic arm 5, the telescopic arm 5 is provided with a rotating swing arm structure, and the rotating swing arm structure is provided with a welding work head 6; the main body 1 is the base of the entire device, used for installation of components and determination of zero position; the clamping structure is located below the main body 1, which functions like human hands, tightly holding the telegraph pole or sign post, and fixing the entire device in the air; the lower turntable 2, the lower hinge connecting frame 3, the fixed arm 4 and the telescopic arm 5: these components together constitute a multi-degree-of-freedom mechanical arm. The lower turntable 2 is responsible for horizontal rotation, the lower hinge connecting frame 3 and the fixed arm 4 are responsible for pitching, and the telescopic arm 5 is responsible for forward and backward telescoping; the rotating swing arm structure and the welding work head 6; the rotating swing arm structure can more finely adjust the posture and angle of the welding head, and the welding work head 6 is the tool for performing the welding task.

[0028] Preferably, the clamping structure comprises a pair of sliding frames 7, a damping turntable 8 is rotatably installed in each of the sliding frames 7, an arc-shaped clamping block 9 is arranged in the damping turntable 8, two pairs of sliding rails 10 are fixedly installed on the lower wall of the main body 1, a pair of sliding frames 7 are slidably installed on the sliding rails 10, the sliding rails 10 are electric sliding rails, a pair of synchronous gears 11 are rotatably installed on the sliding frames 7, a rack 12 is arranged on the sliding frames 7, and the synchronous gears 11 are meshedly connected with the rack 12; the electric sliding rails 10 drive the sliding frames 7 to move, so that the clamping and loosening actions are realized. It can be adapted to different thicknesses of the column; the synchronous gears 11 and the rack 12; its role is to ensure that the left and right sliding frames 7 are consistent in speed and distance when clamping or loosening, so as to realize synchronous opening and closing; it ensures that the center of the device is always aligned with the center of the column, avoiding the device from being tilted due to clamping deviation; the arc-shaped clamping block 9 is used to better fit the round column and increase the contact area, so that the clamping is more stable; the damping turntable 8 allows the arc-shaped clamping block 9 to have a slight self-adaptive rotation when clamping, so as to better adapt to the column with an irregular surface, and further enhance the reliability of the fixing.

[0029] Preferably, a rotating motor 13 is arranged in the main body 1, a driving gear 14 is fixedly installed on the driving end of the rotating motor 13, a driven gear ring 15 is fixedly installed on the lower wall of the lower turntable 2, and the driving gear 14 is meshedly connected with the driven gear ring 15; the rotating motor 13 provides power, and drives the driven gear ring 15 fixedly connected with the lower turntable 2 through the driving gear 14. The mechanical arm is more stable and controllable when rotating.

[0030] The lower hinge connecting frame 3 is further provided with a lower swing motor 16 fixedly installed thereon, and the driving end of the lower swing motor 16 is fixedly connected to one end of the side wall of the fixed arm 4; by controlling the rotation of the motor, the height and angle of the welding head in the vertical direction can be accurately adjusted to adapt to welding points of different heights.

[0031] The fixed arm 4 is further provided with an extension motor 17 and a gear reducer 18 fixedly installed thereon, a lead screw 19 is rotatably installed on the fixed arm 4, the lead screw 19 is fixedly connected to the output end of the gear reducer 18, the input end of the gear reducer 18 is fixedly connected to the driving end of the extension motor 17, a threaded block 20 is fixedly installed on the telescopic arm 5, and the lead screw 19 is threadedly connected with the threaded block 20; the extension motor 17 rotates, drives the lead screw 19 to rotate after speed reduction and force increase through the gear reducer 18. Since the threaded block 20 on the telescopic arm 5 is threadedly connected with the lead screw 19, the rotational movement of the lead screw 19 will be converted into the linear movement of the telescopic arm 5, the transmission is stable, the positioning is accurate, and the telescopic arm 5 has self-locking property.

[0032] The embodiment is further provided with a rotating swing arm structure, which comprises a swing arm motor 21, an upper swing motor 22, an upper rotating disc 23, and an upper swing arm 24. The swing arm motor 21 is fixedly installed at the front end of the extension arm. The upper rotating disc 23 is fixedly installed at the driving end of the swing arm motor 21. The upper swing motor 22 is fixedly installed on the upper wall of the upper rotating disc 23. The upper swing arm 24 is fixedly connected to the driving end of the upper swing motor 22. The welding work head 6 is arranged at the front end of the upper swing arm 24. The swing arm motor 21 and the upper rotating disc 23 are responsible for rotation in the horizontal direction. The upper swing motor 22 and the upper swing arm 24 are responsible for swinging in the vertical direction, which can further accurately approach the welding site and can also be turned over and folded for storage, thereby reducing the space.

[0033] The embodiment is further provided with a fine adjustment motor 25 fixedly arranged at the front end of the upper swing arm 24. The welding work head 6 is rotatably installed at the driving end of the fine adjustment motor 25. The function of this motor is to make the welding head itself rotate to achieve the best welding effect.

[0034] The embodiment is further provided with a guide limiting block 26 arranged at the front end of the fixed arm 4. The extension arm 5 is designed in the shape of an I-beam, which provides the maximum bending and torsional resistance. The guide limiting block 26 provides guidance for the sliding of the extension arm 5, ensuring the stability of its linear motion. It also has a limiting effect, preventing the extension arm 5 from sliding out of the range of the fixed arm 4, thereby increasing the safety.

[0035] The embodiment is further provided with a reinforcing rib 27 arranged on the sliding frame 7. The sliding frame 7 is in the shape of an L.

[0036] The working principle is as follows: The device first realizes firm fixation with the road sign post through the clamping structure, thereby providing a stable base for subsequent welding. The two pairs of electric sliding rails 10 on the lower wall of the main body provide moving power for the sliding frame 7. When the device is lifted to the predetermined height and the clamping structure is aligned with the post, the electric sliding rails 10 drive a pair of L-shaped sliding frames 7 to move synchronously towards the post. The synchronous gears 11 on the sliding frames 7 mesh with the racks 12 to transmit power, forcing the moving speed and distance of the two sliding frames 7 to be completely consistent, thereby avoiding device tilting caused by unilateral deviation and ensuring that the center of the device is always aligned with the center of the post during the clamping process. Self-adaptive clamping: The damping rotating disc 8 rotatably installed in the sliding frame 7 can drive the arc-shaped clamping block 9 to make a small-angle self-adaptive rotation. When the arc-shaped clamping block 9 contacts the post, if there is an irregular protrusion or an arc deviation on the surface of the post, the damping rotating disc 8 will automatically adjust the angle according to the contact pressure, so that the inner wall of the arc-shaped clamping block 9 completely fits the outer wall of the post, thereby increasing the contact area. At the same time, the arc-shaped design of the arc-shaped clamping block 9 is suitable for the circular post structure, which further improves the clamping stability until the preset clamping force is reached (feedback through the control system), thereby completing the rigid fixation of the device and the post and preventing the device from shaking during welding. Structure reinforcement: the reinforcing ribs 27 on the sliding frame 7 enhance the bending and deformation resistance of the frame body, avoiding deformation of the sliding frame 7 caused by excessive clamping force, and ensuring long-term reliability of the fixed structure.

[0037] The device realizes full-dimensional positioning of the welding work head 6 from "large-scale coarse adjustment" to "small-scale fine adjustment" through the multi-degree-of-freedom mechanical arm composed of the "lower turntable 2-fixed arm 4-telescopic arm 5-rotary swing arm structure", and each component cooperates with precise transmission through motor drive, and the specific principle is as follows: Horizontal direction rotation positioning (coarse adjustment): the rotation motor 13 inside the main body 1 is the power source, and the driving end of the motor is fixed with the driving gear 14 which is engaged with the driven gear ring 15 on the lower wall of the lower turntable 2; when the rotation motor 13 is started, the driving gear 14 drives the driven gear ring 15 to rotate, thereby rotating the lower turntable 2 and the mechanical arm connected above as a whole in the horizontal direction, adjusting the horizontal direction of the welding work head 6, and quickly aligning the approximate direction of the welding area of the indicator; Vertical direction pitching positioning (coarse adjustment): the lower hinge connecting frame 3 fixed on the lower turntable 2 provides rotation support for the fixed arm 4, and the driving end of the lower swing motor 16 on the lower hinge connecting frame 3 is directly fixed with one end of the side wall of the fixed arm 4; when the lower swing motor 16 is reversed, it drives the fixed arm 4 to pitch up and down around the hinge point of the lower hinge connecting frame 3, changes the vertical height of the mechanical arm as a whole, and makes the welding work head 6 approach the vertical height range of the welding point; Front and back distance telescopic positioning (coarse adjustment): the extension motor 17 on the fixed arm 4 is the telescopic power source, and the output end thereof is connected with the lead screw 19 through the gear reducer 18; the threaded block 20 on the telescopic arm 5 is threadedly engaged with the lead screw 19, and when the lead screw 19 rotates, the threaded block 20 drives the telescopic arm 5 to move linearly along the guide structure of the fixed arm 4, accurately adjusts the horizontal distance between the welding work head 6 and the welding point, and realizes distance calibration in the "coarse adjustment" stage; at the same time, the guide limiting block 26 at the front end of the fixed arm 4 provides sliding guide for the telescopic arm 5 to prevent it from sliding out of the range of the fixed arm 4, and the I-shaped beam body structure of the telescopic arm 5 can enhance the anti-twisting ability to avoid deformation of the arm body during telescopic process affecting the positioning accuracy; Welding posture fine adjustment: the rotary swing arm structure at the front end of the telescopic arm 5 realizes "small-range accurate posture adjustment" of the welding work head: the swing motor 21 drives the upper turntable 23 to rotate horizontally, finely adjusts the horizontal angle of the welding work head 6; the upper swing motor 22 on the upper turntable 23 drives the upper swing arm 24 to swing vertically, further reduces the vertical position deviation between the welding work head 6 and the welding point; the fine adjustment motor 25 at the front end of the upper swing arm 24 directly drives the welding work head 6 to rotate, adjusts the welding angle of the welding work head 6 such as the weld inclination angle, and ensures that the welding work head 6 is in the best posture to fit the welding point, laying a foundation for high-quality welding.

[0038] When the welding work head finishes positioning, the device enters the automatic welding stage, and the core principle is "parameter preset-automatic welding-point switching": Welding parameter presetting: the operator presets the welding parameters in the control system according to the connection material of the sign and the stand, such as steel type, and the welding process requirements, such as weld depth and current size, to ensure that the welding process meets the strength standard; After confirming the preset parameters, the welding work head 6 is started, which automatically outputs welding energy such as arc and heat according to the preset parameters to perform welding work on the positioned welding points. During the welding process, the multi-degree-of-freedom mechanical arm maintains a stable posture to avoid weld offset caused by displacement, ensuring the uniformity and depth of the weld. If the sign has multiple welding points, the control system drives the mechanical arm to adjust the position of the welding work head according to the preset welding point coordinates to automatically complete the welding of all welding points without manual intervention, achieving standardized operation.

[0039] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any modification, change and modification of the above embodiment, which does not depart from the technical essence of the present application, are still within the scope of the present application.

Claims

1. A positioning welding device for road sign installation, comprising a main body (1), characterized in that, The lower wall surface of the main body (1) is provided with a clamping structure, the upper wall surface of the main body (1) is rotatably installed with a lower turntable (2), the lower turntable (2) is fixedly installed with a lower hinged connecting frame (3), the lower hinged connecting frame (3) is rotatably installed with a fixed arm (4), the fixed arm (4) is slidably installed with an extension arm (5), the extension arm (5) is provided with a rotary swing arm structure, and the rotary swing arm is provided with a welding work head (6).

2. A positioning welding device for road sign installation according to claim 1, characterized in that, The clamping structure comprises a pair of sliding frames (7), a pair of damping turntables (8) are rotatably installed in the sliding frames (7) respectively, arc-shaped clamping blocks (9) are arranged in the damping turntables (8), two pairs of slide rails (10) are fixedly installed on the lower wall surface of the main body (1), a pair of the sliding frames (7) are slidably installed on the slide rails (10) respectively, the slide rails (10) are electric rails, a pair of synchronous gears (11) are rotatably installed on a pair of the sliding frames (7), a pair of racks (12) are arranged on a pair of the sliding frames (7), and the synchronous gears (11) are meshedly connected with the racks (12) respectively.

3. A positioning welding device for road sign installation according to claim 3, characterized in that, A rotating motor (13) is arranged in the main body (1), a driving gear (14) is fixedly installed on the driving end of the rotating motor (13), and a driven gear ring (15) is fixedly installed on the lower wall surface of the lower turntable (2).

4. A positioning welding device for road sign installation according to claim 3, characterized in that, A lower swing motor (16) is fixedly installed on the lower hinged connecting frame (3), and the driving end of the lower swing motor (16) is fixedly connected to the one end side wall surface of the fixed arm (4).

5. A positioning welding device for road sign mounting according to claim 4, characterized in that, An extension motor (17) and a gear reducer (18) are fixedly installed on the fixed arm (4), a lead screw (19) is rotatably installed on the fixed arm (4), the lead screw (19) is fixedly connected to the output end of the gear reducer (18), the input end of the gear reducer (18) is fixedly connected to the driving end of the extension motor (17), a threaded block (20) is fixedly installed on the extension arm (5), and the lead screw (19) is threadedly connected with the threaded block (20).

6. A positioning welding device for road sign mounting according to claim 5, characterized in that, The rotary swing arm structure comprises a swing arm motor (21), an upper swing motor (22), an upper turntable (23) and an upper swing arm (24), the swing arm motor (21) is fixedly installed on the front end of the extension arm, the upper turntable (23) is fixedly installed on the driving end of the swing arm motor (21), the upper swing motor (22) is fixedly installed on the upper wall surface of the upper turntable (23), the upper swing arm (24) is fixedly connected to the driving end of the upper swing motor (22), and the welding work head (6) is arranged on the front end of the upper swing arm (24).

7. A positioning welding device for road sign mounting according to claim 6, characterized in that, A fine adjustment motor (25) is fixedly arranged on the front end of the upper swing arm (24), and the welding work head (6) is rotatably installed on the driving end of the fine adjustment motor (25).

8. A positioning welding device for road sign mounting according to claim 7, characterized in that, The extension arm (5) is a I-shaped beam body, and the front end of the fixed arm (4) is provided with a guide limiting block (26).

9. A positioning welding device for road sign mounting according to claim 8, characterized in that, The sliding frame (7) is provided with a reinforcing rib (27), and the sliding frame (7) is an L-shaped frame.

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