Sign automation welding device and method of use

Abstract

The application discloses a kind of automatic welding device and use method of label, it is related to welding equipment technical field, comprising: positioning assembly, the positioning assembly is used for the clamping positioning of circular label;Guiding component, the guiding component is evenly fixedly connected to the inside of positioning assembly in annular array, for clamping guiding of positioning assembly;Limiting component, the limiting component is evenly distributed in annular array, and with positioning assembly is movably connected, and the bottom of limiting component is fixedly connected to the bottom of guiding component, for positioning and clamping to different diameter annular frame.The present application realizes label automatic centering clamping by positioning and guiding component, improves positioning accuracy, uses limiting component to adaptively fit and lock different diameter frame, enhances versatility, both synergistically guarantee internal and external accurate centering, combined with automatic rotary welding, realize the full-automatic coherent production of adaptive clamping to welding.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to an automated sign welding device and its usage method. Background Technology

[0002] Signage, as a key component for product identification and information carrier, is widely used in various industrial equipment and civilian products. Among them, the combination of round sign and ring frame is favored due to its beautiful appearance and compact structure. In the manufacturing process of signage, it is usually necessary to weld and fix the round sign and ring frame at the included angle to ensure its structural strength and integrity.

[0003] The existing welding fixtures have a low degree of automation in positioning and clamping, mostly relying on manual threaded clamping or simple mechanical clips for fixation. Furthermore, manual positioning makes it difficult to ensure the precise centering of the circular sign on the placement table, easily leading to coaxiality deviation between the sign and the ring frame. This results in inconsistent weld gap widths, severely impacting welding quality and product appearance. Secondly, there are numerous types of signs, with different models often equipped with ring frames of varying diameters. Existing fixtures are mostly customized structures for single sizes, lacking versatility and adaptive adjustment capabilities. When changing product models, fixtures must be replaced or cumbersome manual adjustments must be made, significantly increasing changeover time and production costs. During welding, the internal support clamping mechanism often lacks effective self-locking and step adjustment mechanisms. When rotating and welding under heat or stress, the clamping end is prone to slippage or loosening, causing frame displacement, resulting in weld misalignment or defective products. Summary of the Invention

[0004] Technical problems to be solved

[0005] The purpose of this invention is to overcome the shortcomings of existing sign welding devices, such as poor positioning accuracy, difficulty in adapting to frames of different diameters, unreliable clamping and locking, and low degree of automation.

[0006] Technical solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automated sign welding device, comprising:

[0008] A positioning component, the positioning component being used for clamping and positioning a circular sign;

[0009] A guide assembly, which is uniformly fixedly connected to the inner side of the positioning assembly in a circular array, is used for the positioning assembly to clamp and guide.

[0010] The limiting components are evenly distributed in a ring array and are movably connected to the positioning components. The bottom of the limiting components is fixedly connected to the bottom of the guide components, and is used for positioning and clamping of ring frames of different diameters.

[0011] Four support columns are fixedly connected to the bottom of the positioning component, and a base is fixedly connected to the bottom of each support column. An electric telescopic frame is fixedly connected to the outside of the base, and a rotary welding machine is fixedly connected to the top of the electric telescopic frame. Welding guns are fixedly installed in a circular array at the bottom of the rotary welding machine for welding and fixing the corner of the circular sign and the circular frame.

[0012] Furthermore, the positioning component includes:

[0013] The placement platform is circular, and several connecting grooves are evenly distributed in a ring array on the outer side of the placement platform. Connecting holes are opened inside the connecting grooves, and the connecting grooves adjacent to each other on both sides of the connecting groove with the connecting hole do not have connecting holes.

[0014] A sliding block, wherein several sliding blocks are provided and are slidably connected to the inside of the connecting groove;

[0015] The positioning strip is arc-shaped and is fixedly connected to the top of the sliding block to hold the circular sign in the center on the surface of the placement platform.

[0016] The connecting groove has sliding grooves on both sides, and the cross-section of the sliding grooves is T-shaped. The sliding block has pulleys movably connected to both sides, and the sliding block is slidably connected to the connecting groove through the pulleys and the sliding grooves respectively.

[0017] Furthermore, the positioning component also includes:

[0018] An electro-hydraulic rod is fixedly connected to the center of the base surface, and a connecting block is fixedly connected to the telescopic end of the electro-hydraulic rod. The connecting block is circular.

[0019] A control bar, wherein several control bars are provided;

[0020] One end of the control bar is movably connected to the bottom of the sliding block via a rotating shaft, and the other end of the control bar is movably connected to the outside of the connecting block via a rotating shaft. This is used for the electric hydraulic rod to extend and retract, pulling the control bar to drive the sliding block to slide inside the connecting groove.

[0021] Furthermore, the guiding component includes:

[0022] A guide rod, one end of which is fixedly connected to the inside of the connecting hole, and the other end of which extends to the outside of the connecting groove. A limit head is fixedly connected to the end of the guide rod located outside the connecting groove.

[0023] A return spring, wherein the return spring is sleeved on the outside of the guide rod;

[0024] The sliding block is slidably connected to the outside of the guide rod, and the reset spring is located between the sliding block and the connecting hole for resetting after the sliding block is clamped.

[0025] Furthermore, a connecting strip is slidably connected to the outer side of the guide rod, and the connecting strip is located between the limiting head and the sliding block.

[0026] Furthermore, the limiting component includes:

[0027] Linkage rod, which passes through and is fixedly connected to the connecting bar;

[0028] Two sets of limiting strips, the tops of the two sets of limiting strips are arc-shaped, and the two sets of limiting strips are symmetrical about the connecting strip and their bottoms are respectively movably connected to the outside of the connecting rod through a torque spring and a collar;

[0029] A connecting frame, which is U-shaped, and whose two ends are respectively fixedly connected to one side of two sets of limiting strips;

[0030] An electric push rod is fixedly connected to the bottom of a connecting strip, and a transmission strip is fixedly connected to the output end of the electric push rod.

[0031] Furthermore, control ropes are fixedly connected to both ends of the transmission bar, and the top ends of the control ropes are fixedly connected to the bottom center of the connecting frame, which is used to pull the connecting frame to drive the two sets of limiting bars to open to both sides. Annular limiting teeth are fixedly connected to the inner side of the limiting bars.

[0032] Furthermore, the limiting component also includes:

[0033] A push rod, wherein an annular groove is provided on the outer side of the push rod, and the annular groove is distributed in a linear array on the outer side of the push rod;

[0034] A sleeve, which, in conjunction with a spring, is fitted onto the outside of the push rod, allowing the push rod to slide automatically back and forth inside the sleeve;

[0035] Clamping bars are fixedly connected to one end of the push rod, and the clamping bars are arc-shaped.

[0036] Furthermore, the top end of the positioning strip is provided with a groove, and the sleeve is fixedly connected to the inside of the groove through a connecting shaft. The clamping strip is located inside the positioning strip, and the other end of the push rod extends through the connecting strip to its outside. The annular groove is adapted to the annular limiting tooth, and the limiting strip is clamped and engaged with the outside of the push rod through the limiting tooth and the annular groove to control the sliding of the push rod.

[0037] Furthermore, an automated sign welding device and its usage method include the following steps:

[0038] S1. When it is necessary to automatically weld the circular sign and the ring frame, first place the circular sign on the surface of the placement table, start the electric hydraulic rod on the base to drive the circular connecting block to move. The connecting block pulls the control bar through the rotating shaft, which in turn drives the sliding block to slide towards the center inside the connecting groove. The pulleys on both sides of the sliding block guide the translation along the T-shaped sliding groove, which drives the arc-shaped positioning bar at the top to clamp the circular sign in the center.

[0039] S2. During this process, the sliding block slides along the guide rod and compresses the return spring. At the same time, the sliding block also pushes the connecting strip on the outside of the guide rod to move inward synchronously.

[0040] S3. After the circular sign is positioned, place the annular frame on the outside of the sign. At this time, the annular limiting teeth on the inner side of the limiting strip of the limiting component are engaged with the annular groove on the outer side of the push rod, and the push rod is locked and cannot move. In order to adapt to clamping annular frames of different diameters, start the electric push rod to drive the transmission strip to move. The transmission strip pulls the U-shaped connecting frame through the control rope, overcomes the resistance of the torque spring, and drives the two sets of limiting strips to open to both sides around the connecting rod. After the limiting strips are opened, the annular limiting teeth and the annular groove disengage, releasing the limitation on the push rod.

[0041] S4. At this point, the spring inside the sleeve releases its elastic force, and the push rod slides forward inside the sleeve, causing the arc-shaped clamping strip to converge inward until it fits against the inner side of the annular frame, thus achieving adaptive clamping for annular frames of different diameters.

[0042] S5. After the clamping strip is attached to the frame, the electric push rod retracts to release the tension. The two sets of limit strips are reset and closed under the action of the torque spring. The annular limit teeth engage with the corresponding annular slot on the push rod again, locking the push rod again. This, together with the positioning strip, firmly clamps and positions the annular frame and the circular nameplate.

[0043] S6. Subsequently, the electric telescopic frame is started to drive the rotary welding machine to descend. The welding gun at the bottom is aligned with the angle between the circular nameplate and the annular frame for automatic rotary welding. After welding is completed, the electric push rod is started again to open the limit bar and release the lock on the push rod. The clamping bar is released outward with the push rod to loosen the frame. Then, the electric hydraulic rod moves in the opposite direction, and the sliding block slides outward along the guide rod under the action of the return spring to reset. The positioning bar releases the circular nameplate, and the welded nameplate product can be taken out.

[0044] Compared with existing technologies, this automated sign welding device and its usage method have the following advantages:

[0045] I. This invention, through the setting of positioning and guiding components, utilizes an electric hydraulic rod in conjunction with a control bar to drive the sliding block and the arc-shaped positioning bar to converge synchronously towards the center. Combined with the precise guidance of the pulley and the T-shaped sliding groove, as well as the automatic reset function of the return spring, it realizes the automated centering clamping and convenient unloading of circular signs, improving the accuracy of sign positioning and work efficiency.

[0046] Second, the present invention utilizes a limiting component to achieve a meshing and disengagement mechanism between the limiting strip and the annular groove of the push rod. In conjunction with an electric push rod and a torque spring, the opening and closing of the limiting strip is controlled. After unlocking, the clamping strip can be pushed by the sleeve spring to adaptively fit annular frames of different diameters and then mesh and lock again. This achieves rapid adaptive clamping and firm positioning of annular frames of different sizes, enhancing the versatility and clamping reliability of the device.

[0047] Third, through the coordinated operation of the positioning component and the limiting component, the present invention enables the circular sign and the annular frame to achieve precise internal and external centering and tight fit, ensuring the consistency of the welded joint. Combined with the automatic rotary welding operation of the electric telescopic frame and the rotary welding machine, the invention realizes fully automated continuous production from adaptive clamping and positioning to rotary welding, ensuring welding quality and significantly improving production efficiency.

[0048] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0049] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0050] Figure 2 This is a bottom-view three-dimensional structural diagram of the present invention;

[0051] Figure 3 This is a schematic diagram of the connection structure of the positioning component of the present invention;

[0052] Figure 4 This is a partial cross-sectional view of the connection structure of the placement platform of the present invention;

[0053] Figure 5 This is a schematic diagram of the connecting block connection structure of the present invention;

[0054] Figure 6 This is a schematic diagram of the connection structure of the guide component of the present invention;

[0055] Figure 7 This is a schematic diagram of the connection structure of the limiting component of the present invention;

[0056] Figure 8 For the present invention Figure 3 Enlarged connection structure diagram at point A;

[0057] Figure 9 For the present invention Figure 7 Enlarged schematic diagram of the connection structure at point B.

[0058] In the diagram: 1. Positioning assembly; 101. Placement platform; 102. Connecting groove; 103. Sliding block; 104. Positioning strip; 105. Slide groove; 106. Pulley; 107. Electro-hydraulic rod; 108. Connecting block; 109. Control strip; 2. Guide assembly; 201. Guide rod; 202. Return spring; 203. Connecting strip; 204. Limiting head; 3. Limiting assembly; 301. Connecting rod; 302. Limiting strip; 303. Connecting frame; 304. Electric push rod; 305. Transmission strip; 306. Control rope; 307. Annular limiting tooth; 308. Push rod; 309. Sleeve; 310. Clamping strip; 4. Support column; 5. Base; 6. Electric telescopic frame; 7. Welding gun; 8. Groove; 9. Rotary welding machine. Detailed Implementation

[0059] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] like Figure 1-9 As shown, the present invention provides a technical solution: an automated sign welding device, comprising:

[0061] Positioning component 1 is used for clamping and positioning circular signs;

[0062] Guide component 2, which is uniformly fixedly connected to the inner side of positioning component 1 in a ring array, is used to clamp and guide the positioning component 1;

[0063] The limiting component 3 is evenly distributed in a ring array and is movably connected to the positioning component 1. The bottom of the limiting component 3 is fixedly connected to the bottom of the guide component 2 and is used for positioning and clamping of ring frames of different diameters.

[0064] Four support columns 4 are fixedly connected to the bottom of the positioning component 1, and a base 5 is fixedly connected to the bottom of the support columns 4. An electric telescopic frame 6 is fixedly connected to the outside of the base 5, and a rotary welding machine 9 is fixedly connected to the top of the electric telescopic frame 6. Welding guns 7 are fixedly installed in a circular array at the bottom of the rotary welding machine 9 for welding and fixing the corner of the circular sign and the circular frame.

[0065] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8 As shown, the positioning component 1 includes a circular placement platform 101. Several connecting grooves 102 are evenly distributed in a ring array on the outer side of the placement platform 101. Some of the connecting grooves 102 have connecting holes inside, while the connecting grooves 102 adjacent to each other on both sides of the connecting hole do not have connecting holes inside. Sliding blocks 103 are slidably connected inside each connecting groove 102. An arc-shaped positioning strip 104 is fixedly connected to the top of the sliding block 103 for centering and clamping the circular sign on the surface of the placement platform 101. T-shaped sliding grooves 105 are opened on both sides of the inner side of the connecting groove 102. Pulleys 106 that are adapted to the sliding grooves 105 are movably connected to both sides of the sliding block 103. The sliding block 103 is slidably connected to the connecting groove 102 through the cooperation of the pulleys 106 and the sliding grooves 105 to ensure smooth guidance when the sliding block 103 moves.

[0066] The positioning component 1 also includes a driving component, specifically an electric hydraulic rod 107 fixedly connected to the center of the surface of the base 5. The telescopic end of the electric hydraulic rod 107 is fixedly connected to a circular connecting block 108. Several control bars 109 are movably connected to the outside of the connecting block 108. One end of the control bar 109 is movably connected to the bottom of the corresponding sliding block 103 through a rotating shaft, and the other end of the control bar 109 is movably connected to the outside of the connecting block 108 through a rotating shaft. Thus, the telescopic movement of the electric hydraulic rod 107 drives the connecting block 108 to move and pulls the control bars 109, thereby driving the sliding block 103 to slide synchronously in the connecting groove 102 in a centripetal or centrifugal motion, realizing the automatic clamping and releasing of the circular sign.

[0067] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, the guide assembly 2 includes a guide rod 201 and a return spring 202. One end of the guide rod 201 is fixedly connected to the inside of the connecting hole, and the other end extends to the outside of the connecting groove 102. The end of the guide rod 201 located outside the connecting groove 102 is fixedly connected to a limit head 204, which serves to prevent disengagement and limit the movement. The return spring 202 is sleeved on the outside of the guide rod 201. The sliding block 103 is slidably connected to the outside of the guide rod 201, and the return spring 202 is located between the sliding block 103 and the connecting hole, which provides an outward return force after the sliding block 103 completes the clamping action.

[0068] In addition, a connecting strip 203 is slidably connected to the outside of the guide rod 201, and the connecting strip 203 is located between the limiting head 204 and the sliding block 103, so that when the sliding block 103 slides inward, it pushes the connecting strip 203 to move synchronously along the guide rod 201.

[0069] like Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 9 As shown, the limiting assembly 3 includes a connecting rod 301 and two sets of limiting strips 302. The connecting rod 301 passes through the connecting strip 203 and is fixedly connected to it. The tops of the two sets of limiting strips 302 are arc-shaped, and the two sets of limiting strips 302 are symmetrical about the connecting strip 203. Their bottoms are respectively connected to the outside of the connecting rod 301 with a torque spring and a collar. A U-shaped connecting frame 303 is fixedly connected to one side of the two sets of limiting strips 302. In addition, an electric push rod 304 is fixedly connected to the bottom of the connecting strip 203, and a transmission strip 305 is fixedly connected to the output end of the electric push rod 304.

[0070] Control ropes 306 are fixedly connected to both ends of the transmission bar 305, and the top ends of the control ropes 306 are fixedly connected to the bottom center of the connecting frame 303. They are used to pull the connecting frame 303 when the electric push rod 304 retracts, thereby driving the two sets of limit bars 302 to open to both sides against the resistance of the torque spring. Annular limit teeth 307 are fixedly connected to the inner side of the limit bars 302.

[0071] The limiting assembly 3 also includes a push rod 308, a sleeve 309, and a clamping strip 310. An annular groove is provided on the outer side of the push rod 308, and the annular grooves are arranged in a linear array on the outer side of the push rod 308. The sleeve 309, in conjunction with a spring, is sleeved on the outer side of the push rod 308, allowing the push rod 308 to automatically slide back and forth inside the sleeve 309 under the action of the spring. The clamping strip 310 is fixedly connected to one end of the push rod 308, and the clamping strip 310 is arc-shaped.

[0072] The top end of the positioning strip 104 has a groove 8, and the sleeve 309 is fixedly connected to the inside of the groove 8 through the connecting shaft. The clamping strip 310 is located inside the positioning strip 104. The other end of the push rod 308 extends through the connecting strip 203 to its outside. The annular groove is adapted to the annular limiting tooth 307, and the limiting strip 302 is clamped and engaged with the outside of the push rod 308 through the annular limiting tooth 307 and the annular groove. This is used to lock the position of the push rod 308 when the limiting strip 302 is closed, thereby controlling the sliding of the push rod 308 and realizing adaptive clamping and fixing of frames with different diameters.

[0073] Working principle: When it is necessary to automatically weld the circular sign and the ring frame, first place the circular sign on the surface of the placement platform 101, start the electric hydraulic rod 107 on the base 5 to drive the circular connecting block 108 to move. The connecting block 108 pulls the control bar 109 through the rotating shaft, which in turn drives the sliding block 103 to slide towards the center inside the connecting groove 102. The pulleys 106 on both sides of the sliding block 103 are guided to move along the T-shaped sliding groove 105, which drives the arc-shaped positioning bar 104 at the top to clamp the circular sign in the center. During this process, the sliding block 103 slides along the guide rod 201 and compresses the return spring 202. At the same time, the sliding block 103 also pushes the connecting bar 203 on the outside of the guide rod 201 to move inward synchronously.

[0074] After the circular sign is positioned, the annular frame is placed on the outside of the sign. At this time, the annular limiting tooth 307 on the inner side of the limiting strip 302 of the limiting component 3 is engaged with the annular groove on the outer side of the push rod 308, and the push rod 308 is locked and cannot move. In order to adaptively clamp annular frames of different diameters, the electric push rod 304 is activated to drive the transmission strip 305 to move. The transmission strip 305 pulls the U-shaped connecting frame 303 through the control rope 306, overcoming the resistance of the torque spring and driving the two sets of limiting strips 302 to open to both sides around the connecting rod 301. After the limiting strips 302 are opened, the annular limiting tooth 307 disengages from the annular groove, releasing the limitation on the push rod 308. At this time, the spring inside the sleeve 309 releases its elastic force, and the push rod 308 slides forward in the sleeve 309, driving the arc-shaped clamping strip 310 to converge inward until the clamping strip 310 fits against the inner side of the annular frame, thereby achieving adaptive clamping of annular frames of different diameters.

[0075] After the clamping bar 310 fits against the frame, the electric push rod 304 retracts to release the tension. The two sets of limiting bars 302 reset and close under the action of the torque spring. The annular limiting tooth 307 engages again with the corresponding annular groove on the push rod 308, locking the push rod 308 again. This, together with the positioning bar 104, firmly clamps and positions the annular frame and the circular nameplate. Then, the electric telescopic frame 6 is started to drive the rotary welding machine 9 to descend. The welding gun 7 at the bottom is aimed at the angle between the circular nameplate and the annular frame for automatic rotary welding. After welding is completed, the electric push rod 304 is started again to open the limiting bar 302 and release the lock on the push rod 308. The clamping bar 310 loosens the frame outward with the push rod 308. Then, the electric hydraulic rod 107 moves in the opposite direction. The sliding block 103 slides outward along the guide rod 201 under the action of the reset spring 202. The positioning bar 104 loosens the circular nameplate, and the welded nameplate product can be taken out.

[0076] It should be noted that in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," and "linked" should be interpreted broadly. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "linked" can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0077] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated sign welding device, characterized in that, include: Positioning component (1), the positioning component (1) is used for clamping and positioning of circular signs; The guide component (2) is uniformly fixedly connected to the inner side of the positioning component (1) in a ring array, and is used for the positioning component (1) to clamp and guide. The limiting component (3) is evenly distributed in a ring array and is movably connected to the positioning component (1). The bottom of the limiting component (3) is fixedly connected to the bottom of the guide component (2) for positioning and clamping of ring frames of different diameters. Four support columns (4) are fixedly connected to the bottom of the positioning component (1), and a base (5) is fixedly connected to the bottom of the support column (4). An electric telescopic frame (6) is fixedly connected to the outside of the base (5), and a rotary welding machine (9) is fixedly connected to the top of the electric telescopic frame (6). A welding gun (7) is fixedly installed in a ring array at the bottom of the rotary welding machine (9) for welding and fixing the corner of the circular sign and the ring frame.

2. The automated welding device for signs according to claim 1, characterized in that, The positioning component (1) includes: The placement platform (101) is circular, and several connecting slots (102) are evenly distributed in a ring array on the outer side of the placement platform (101). Connecting holes are provided inside the connecting slots (102), and no connecting holes are provided inside the adjacent connecting slots (102) on both sides of the connecting slot (102) with connecting holes. Sliding blocks (103), wherein several sliding blocks (103) are provided and are slidably connected to the inside of the connecting groove (102); Positioning strip (104), the positioning strip (104) is arc-shaped and the positioning strip (104) is fixedly connected to the top of the sliding block (103) to hold the circular sign in the center on the surface of the placement platform (101); The connecting groove (102) has sliding grooves (105) on both sides, and the cross section of the sliding groove (105) is T-shaped. The sliding block (103) has pulleys (106) movably connected on both sides, and the sliding block (103) is slidably connected to the connecting groove (102) through the pulleys (106) and the sliding grooves (105).

3. The automated welding device for signs according to claim 2, characterized in that, The positioning component (1) further includes: An electric hydraulic rod (107) is fixedly connected to the center of the surface of the base (5). The telescopic end of the electric hydraulic rod (107) is fixedly connected to a connecting block (108), which is circular. Control bar (109), wherein several control bars (109) are provided; One end of the control bar (109) is movably connected to the bottom of the sliding block (103) via a rotating shaft, and the other end of the control bar (109) is movably connected to the outside of the connecting block (108) via a rotating shaft. This is used for the electric hydraulic rod (107) to extend and retract to pull the control bar (109) and drive the sliding block (103) to slide inside the connecting groove (102).

4. The automated welding device for signs according to claim 2, characterized in that, The guiding component (2) includes: Guide rod (201), one end of the guide rod (201) is fixedly connected to the inside of the connecting hole, and the other end of the guide rod (201) extends to the outside of the connecting groove (102). The end of the guide rod (201) located outside the connecting groove (102) is fixedly connected to the limiting head (204). A return spring (202) is sleeved on the outside of the guide rod (201); The sliding block (103) is slidably connected to the outside of the guide rod (201), and the reset spring (202) is located between the sliding block (103) and the connecting hole, and is used to reset the sliding block (103) after clamping.

5. The automated welding device for signs according to claim 4, characterized in that, The guide rod (201) is slidably connected to a connecting strip (203), and the connecting strip (203) is located between the limiting head (204) and the sliding block (103).

6. The automated welding device for signs according to claim 1, characterized in that, The limiting component (3) includes: A connecting rod (301) passes through and is fixedly connected to the connecting strip (203); Two sets of limiting strips (302) are provided. The tops of the two sets of limiting strips (302) are arc-shaped. The two sets of limiting strips (302) are symmetrical about the connecting strip (203) and their bottoms are movably connected to the outside of the connecting rod (301) through a torque spring and a collar, respectively. The connecting frame (303) is U-shaped, and both ends of the connecting frame (303) are fixedly connected to one side of the two sets of limiting strips (302); An electric push rod (304) is fixedly connected to the bottom of the connecting bar (203), and a transmission bar (305) is fixedly connected to the output end of the electric push rod (304).

7. The automated welding device for signs according to claim 6, characterized in that, The two ends of the transmission bar (305) are respectively fixedly connected to control ropes (306), and the top ends of the control ropes (306) are respectively fixedly connected to the bottom center of the connecting frame (303) for pulling the connecting frame (303) to drive the two sets of limiting bars (302) to open to both sides. The inner side of the limiting bar (302) is fixedly connected to annular limiting teeth (307).

8. The automated welding device for signs according to claim 6, characterized in that, The limiting component (3) also includes: A push rod (308) has an annular groove on its outer side, and the annular groove is distributed in a linear array on the outer side of the push rod (308); A sleeve (309) is fitted with a spring and is placed on the outside of the push rod (308) for the push rod (308) to slide back and forth automatically inside the sleeve (309); Clamping strips (310) are fixedly connected to one end of the push rod (308), and the clamping strips (310) are arc-shaped.

9. The automated welding device for signs according to claim 8, characterized in that, The top end of the positioning strip (104) is provided with a groove (8), and the sleeve (309) is fixedly connected to the inside of the groove (8) through the connecting shaft. The clamping strip (310) is located inside the positioning strip (104). The other end of the push rod (308) extends through the connecting strip (203) to its outer side. The annular groove is adapted to the annular limiting tooth (307), and the limiting strip (302) is clamped and engaged with the outside of the push rod (308) through the limiting tooth (307) and the annular groove to control the sliding of the push rod (308).

10. An automated sign welding device and its usage method, characterized in that, An automated sign welding device according to any one of claims 1-9 comprises the following steps: S1. When it is necessary to automatically weld the circular sign and the ring frame, first place the circular sign on the surface of the placement table (101), start the electric hydraulic rod (107) on the base (5) to drive the circular connecting block (108) to move. The connecting block (108) pulls the control bar (109) through the rotating shaft, which in turn drives the sliding block (103) to slide towards the center inside the connecting groove (102). The pulleys (106) on both sides of the sliding block (103) are guided to move along the T-shaped sliding groove (105), which drives the arc-shaped positioning bar (104) at the top to clamp the circular sign in the center. S2. During this process, the sliding block (103) slides along the guide rod (201) and compresses the return spring (202), while the sliding block (103) also pushes the connecting strip (203) on the outside of the guide rod (201) to move inward synchronously. S3. After the circular sign is positioned, the annular frame is placed on the outside of the sign. At this time, the annular limiting tooth (307) on the inner side of the limiting strip (302) of the limiting component (3) is engaged with the annular groove on the outer side of the push rod (308). The push rod (308) is locked and cannot move. In order to adapt to clamping annular frames of different diameters, the electric push rod (304) is started to drive the transmission strip (305) to move. The transmission strip (305) pulls the U-shaped connecting frame (303) through the control rope (306), overcoming the resistance of the torque spring and driving the two sets of limiting strips (302) to open to both sides around the connecting rod (301). After the limiting strip (302) is opened, the annular limiting tooth (307) disengages from the annular groove, releasing the limitation on the push rod (308). S4. At this time, the spring inside the sleeve (309) releases its elastic force, and the push rod (308) slides forward inside the sleeve (309), causing the arc-shaped clamping strip (310) to converge inward until the clamping strip (310) fits against the inner side of the annular frame, thereby achieving adaptive clamping of annular frames of different diameters. S5. After the clamping strip (310) fits against the frame, the electric push rod (304) retracts to release the tension. The two sets of limiting strips (302) reset and close under the action of the torque spring. The annular limiting tooth (307) meshes with the corresponding annular slot on the push rod (308) again, locking the push rod (308) again, thereby cooperating with the positioning strip (104) to firmly clamp and position the annular frame and the circular nameplate. S6. Then, start the electric telescopic frame (6) to drive the rotary welding machine to descend. The welding gun (7) at the bottom is aligned with the angle between the circular nameplate and the ring frame for automatic rotary welding. After welding is completed, start the electric push rod (304) again to open the limit bar (302) and release the lock on the push rod (308). The clamping bar (310) releases the frame outward with the push rod (308). Then, the electric hydraulic rod (107) moves in the opposite direction. The sliding block (103) slides outward along the guide rod (201) under the action of the reset spring (202). The positioning bar (104) releases the circular nameplate, and the welded nameplate product can be taken out.

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