A splicing device

Abstract

This application relates to a welding device, which includes a first limiting mechanism and a second limiting mechanism. The top of the liftable first limiting mechanism is connected to the second limiting mechanism. The second limiting mechanism includes a pushing component, a lifting component, and a flipping component. The retractable pushing component is connected to the top of the first limiting mechanism, and the moving direction of the pushing component is perpendicular to the length direction of the first limiting mechanism, used to limit the side of the workpiece to be welded. The liftable lifting component is connected to the output end of the pushing component, and the flipping component is connected to the output end of the lifting component. The flipping component flips towards the retractable direction of the pushing component, and the flipping component cooperates with the first limiting mechanism to clamp the workpiece to be welded in the vertical direction. This application achieves adaptive clamping and positioning of workpieces to be welded of different sizes, ensuring the correct positioning and stable fixation of the workpiece during the welding process, reducing workpiece deformation and movement, and improving welding accuracy and quality.

Description

Technical Field

[0001] This application relates to the field of welding fixtures, and in particular to a welding apparatus. Background Technology

[0002] Welding fixtures are used to ensure that the weldment can be accurately positioned, improve assembly accuracy and efficiency, and prevent welding deformation.

[0003] However, commercially available welding fixtures are difficult to adapt to clamping and welding workpieces of different sizes. This results in multiple workpieces of different sizes needing to be welded on the machine rack, requiring the preparation of multiple fixtures of different sizes. This increases the number and cost of fixtures and requires additional storage space. Changing fixtures for different workpiece sizes can also incur time and labor costs, as it requires disassembly and reinstallation. This leads to delays in fixture changes within the machine rack and a decrease in production efficiency. Summary of the Invention

[0004] To improve the adaptability of welding fixtures to workpieces of different sizes, this application provides a welding device.

[0005] The welding device provided in this application adopts the following technical solution: A welding device includes a first limiting mechanism and a second limiting mechanism. The top of the liftable first limiting mechanism is connected to the second limiting mechanism. The second limiting mechanism includes a pushing component, a lifting component, and a flipping component. The retractable pushing component is connected to the top of the first limiting mechanism. The moving direction of the pushing component is perpendicular to the length direction of the first limiting mechanism, and it is used to limit the side of the workpiece to be welded. The liftable lifting component is connected to the output end of the pushing component. The flipping component is connected to the output end of the lifting component. The flipping component flips towards the retractable direction of the pushing component. The flipping component cooperates with the first limiting mechanism to clamp the workpiece to be welded in the vertical direction.

[0006] By adopting the above technical solution, the first limiting mechanism drives the second limiting mechanism to move closer to or away from the workpiece to be welded. The lifting component adjusts the relative positions of the pushing component and the flipping component. The pushing component and the flipping component clamp the workpiece from two directions to achieve adaptive clamping and positioning of workpieces of different sizes to be welded. This ensures the correct positioning and stable fixation of the workpiece during the welding process, reduces workpiece deformation and movement, improves welding accuracy and quality, reduces fixture changing time and work stoppage, reduces time costs for process preparation and adjustment, and improves the operating efficiency of the frame. Furthermore, it reduces the number of fixtures and manufacturing costs, saving production costs. The fixture system has greater flexibility and can be shared between different work tasks, further reducing costs.

[0007] Optionally, the first limiting mechanism includes a first support plate, a first cylinder, and several first guide components. One end of the retractable first guide component is connected to the bottom of the push component, and the other end is used to connect to the frame. The cylinder body of the first cylinder is connected to the first support plate, and the piston rod of the first cylinder is connected to the push component.

[0008] By adopting the above technical solution, the first cylinder drives the second limiting mechanism to rise or fall as a whole, so that the second limiting mechanism can adapt to workpieces of different sizes in the vertical direction. The first guide component shares the bias force with the first cylinder to ensure that the second limiting mechanism has high reliability and stability and can work stably for a long time, thereby ensuring that the weld is in a stable state.

[0009] Optionally, the pushing assembly includes a support frame, a second cylinder, and a second support plate. The second cylinder is connected to the top of the second support plate via the support frame. The bottom of the second support plate is connected to the output end of the first limiting mechanism. The piston rod of the second cylinder is connected to a constraint assembly. The constraint assembly has at least two contact points in the vertical direction for limiting at least two workpieces to be welded.

[0010] By adopting the above technical solution, the second cylinder drives the constraint component to abut against the two workpieces to be welded. Each workpiece to be welded is restricted by at least one contact point. It is worth noting that two sets of constraint components can be used to clamp and restrict the workpieces to be welded, or one set of constraint components can be used in conjunction with the frame to restrict and position the workpieces to be welded. This is applicable to workpieces of various shapes and sizes, flat workpieces or complex curved workpieces. Point contact abutment can provide stable positioning and restriction.

[0011] Optionally, the constraint assembly includes a constraint plate, several adjusting rods, and several limiting rods. The constraint plate is connected to the piston rod end of the second cylinder, the several adjusting rods are connected to the constraint plate, and the adjusting rods are arranged in an array along the vertical direction with several adjusting holes. One end of the limiting rod is detachably connected to any adjusting hole, and the other end of the limiting rod is used to abut against the workpiece to be welded. Each adjusting rod is connected to at least two limiting rods.

[0012] By adopting the above technical solution, the flexibility of limiting the workpiece to be welded is increased. Different specifications and numbers of limiting rods can be replaced to limit the workpiece according to different sizes of workpieces, thereby improving the accuracy of limiting the workpiece. Furthermore, point contact limiting reduces stress concentration and the risk of workpiece deformation, improves the welding quality of the workpiece, and can better fix the workpiece, reducing the risk of the workpiece accidentally falling out of the clamp.

[0013] Optionally, the support frame is connected to an adjustment assembly, which includes a buffer rod, a crescent-shaped component, and a limiting ring. One end of the buffer rod is fixedly connected to the constraint plate, and the other end is fixedly connected to the limiting ring. The buffer rod is slidably connected to the support frame. The central axis of the buffer rod is parallel to the central axis of the piston rod of the second cylinder. The crescent-shaped component is detachably connected to the buffer rod section between the support frame and the limiting ring.

[0014] By adopting the above technical solution, the crescent-shaped component acts as a guide and can control the clamping force, ensuring that the workpiece is firmly clamped without being subjected to excessive or insufficient force, reducing the risk of workpiece deformation or damage, limiting the stroke of the second cylinder, thereby reducing energy consumption, and helping to reduce production costs and energy consumption on long-running machine frames.

[0015] Optionally, the lifting assembly includes a third cylinder and a third support plate. The third support plate is connected to the constraint plate. The cylinder body of the third cylinder is connected to the bottom of the third support plate. The piston rod of the third cylinder is slidably connected to the third support plate and fixedly connected to the tilting assembly. The central axis of the piston rod of the third cylinder is parallel to the central axis of the piston rod of the first cylinder.

[0016] By adopting the above technical solution, the lifting component drives the flipping component to rise or fall, thereby adjusting the position of the flipping component relative to the workpiece to be welded, so that the flipping component and the pushing component can move relative to each other, further improving the flexibility and accuracy of workpiece restriction, thereby ensuring the stability of the workpiece position and improving the quality of workpiece welding.

[0017] Optionally, the flipping assembly includes a fourth support plate, a transmission component, and a rotary cylinder. The cylinder body of the rotary cylinder is connected to the top of the fourth support plate, and the rotating shaft of the rotary cylinder is fixedly connected to one end of the transmission component. The end of the transmission component away from the rotary cylinder is a free end, used to rotate the transmission component and abut against the top of the workpiece.

[0018] By adopting the above technical solution, a stable limiting effect is provided in the vertical direction. The rotary cylinder driving the transmission component can provide a large adjustable range, making it suitable for workpieces of different sizes. Without the need for frequent replacement of the transmission component, the stability of the workpiece during the welding process can be ensured, preventing it from moving or shaking.

[0019] Optionally, the top of the first support plate is provided with a reinforcing component, which includes a guide plate, a first reinforcing plate and a second reinforcing plate. The guide plate abuts against the side of the second limiting mechanism away from the workpiece to be welded. The first reinforcing plate is arranged along the length of the guide plate and connected to the side of the guide plate facing the second limiting mechanism. One side of the second reinforcing plate is connected to the guide plate and the other side is connected to the first support plate.

[0020] By adopting the above technical solution, the first reinforcing plate abuts against the side of the second limiting mechanism, thereby sharing the pressure of the guide plate, significantly improving the strength of the structure, reducing deflection and deformation, and thus increasing the stability and load-bearing capacity of the structure. The second reinforcing plate reduces the risk of the guide plate bending, resists bending and deformation, and provides stronger structural stability and durability.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. Adaptive clamping and positioning of workpieces of different sizes to ensure correct positioning and stable fixation of workpieces during the welding process, reducing workpiece deformation and movement, and improving welding accuracy and quality; 2. It reduces the time spent changing fixtures and the downtime, reduces the time cost of process preparation and adjustment, and improves the operating efficiency of the machine frame; 3. The number of fixtures and manufacturing costs are reduced, saving production costs. The fixture system is more flexible and can be shared between different work tasks, further reducing costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the working state of a welding device according to this application.

[0023] Figure 2 This is a structural schematic diagram of a welding device according to this application.

[0024] Figure 3 This is a schematic diagram of the structure of the first limiting mechanism in this application.

[0025] Figure 4 This is a schematic diagram of the structure of the second limiting mechanism in this application.

[0026] Figure 5 This is a schematic diagram of the structure of the control component in this application.

[0027] Explanation of reference numerals in the attached drawings: 1. First limiting mechanism; 11. First guide assembly; 111. Support member; 112. Support cylinder; 113. Guide rod; 114. Connecting block; 12. First support plate; 13. First cylinder; 14. Reinforcing assembly; 141. Guide plate; 142. First reinforcing plate; 143. Second reinforcing plate; 144. Hole; 2. Second limiting mechanism; 21. Pushing assembly; 211. Support frame; 212. Second cylinder; 213. Second support plate; 22. Constraint assembly; 221. Constraint plate; 222. Connecting rod; 223. Adjusting rod; 224. Limiting rod; 225. 23. Adjustment hole; 231. Control component; 232. Limiting cylinder; 233. Buffer rod; 234. Limiting ring; 235. Half-moon component; 24. Lifting component; 241. Third cylinder; 242. Third support plate; 25. Tilting component; 251. Fourth support plate; 252. Transmission component; 253. Rotary cylinder; 254. Limiting plate; 255. Limiting hole; 256. Limiting rod; 257. Ear plate; 26. Orientation component; 261. Orientation cylinder; 262. Orientation rod; 263. Orientation ring; 101. Frame; 102. Infrared sensor; 103. Automatic welding robot; 104. Workpiece. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0029] This application discloses a welding apparatus.

[0030] Reference Figure 1 and Figure 2 The welding device includes a first limiting mechanism 1 and a second limiting mechanism 2. The second limiting mechanism 2 is connected to the top of the liftable first limiting mechanism 1. The first limiting mechanism 1 and the second limiting mechanism 2 cooperate to limit the workpiece 104 to be welded.

[0031] Reference Figure 2 and Figure 3The first limiting mechanism 1 includes several first guide components 11 and a first support plate 12. Each first guide component 11 includes a support member 111, a support cylinder 112, and a guide rod 113. The support member 111 is fixedly connected to the frame 101. One end of the guide rod 113 abuts against the support member 111, and the other end of the guide rod 113 is fixedly connected to the second limiting mechanism 2. The guide rod 113 is relative to the support cylinder 112. The guide rod 113 is slidably connected to the support plate. The support cylinder 112 is hollow, and its inner wall is slidably connected to the outer wall of the guide rod 113. A connecting block 114 is provided at one end of the support cylinder 112 near the first support plate 12. The connecting block 114 is fixedly connected to the circumference of the end of the support cylinder 112 opposite to the support member 111. The connecting block 114 is bolted to the top of the first support plate 12, thereby fixing the support cylinder 112 to the first support plate 12.

[0032] Reference Figure 3 The first support plate 12 is connected to the first cylinder 13. The cylinder body of the first cylinder 13 is fixedly connected to the bottom of the first support plate 12. The piston rod of the first cylinder 13 passes through the first support plate 12, and the end of the piston rod of the first cylinder 13 is fixedly connected to the bottom of the second limiting mechanism 2. The central axis of the piston rod of the first cylinder 13 is parallel to the central axis of the guide rod 113.

[0033] The top of the first support plate 12 is provided with a reinforcing component 14, which includes a guide plate 141, a first reinforcing plate 142, and a second reinforcing plate 143. The guide plate 141 abuts against the side of the second limiting mechanism 2, which is in the direction of the force on the second limiting mechanism 2, to counteract the external force on the second limiting mechanism 2 and thus improve the stability of the overall structure. The guide plate 141 has several holes 144 to reduce the weight of the guide plate 141, thereby ensuring that the first cylinder 13 can release more effective load. The first reinforcing plate 142 is arranged along the length of the guide plate 141 and is fixedly connected to the side of the guide plate 141 facing the second limiting mechanism 2. The first reinforcing plate 142 abuts against the side of the second limiting mechanism 2, thereby sharing the pressure of the guide plate 141, significantly improving the strength of the structure, reducing deflection and deformation, and thus increasing the stability and load-bearing capacity of the structure. One side of the second reinforcing plate 143 is fixedly connected to the guide plate 141, and the other side is fixedly connected to the first support plate 12. The second reinforcing plate 143 and the guide plate 141 are arranged perpendicular to each other, which reduces the risk of bending of the guide plate 141, resists bending and deformation, and provides stronger structural stability and durability.

[0034] Reference Figure 4The second limiting mechanism 2 includes a pushing component 21 and a lifting component 24. The pushing component 21 is fixedly installed on the top of the first support plate 12. The lifting component 24 is connected to the pushing component 21. The pushing component 21 drives the lifting component 24 to move toward the workpiece 104 to be welded, so as to limit the workpiece 104.

[0035] The pushing assembly 21 includes a support frame 211, a second cylinder 212, and a second support plate 213. The piston rod end of the first cylinder 13 is fixedly connected to the bottom of the second support plate 213. The support frame 211 is fixedly connected to the top of the second support plate 213 and is an "L"-shaped plate. The cylinder body of the second cylinder 212 is fixedly connected to the support frame 211, and the central axis of the piston rod of the second cylinder 212 is perpendicular to the central axis of the first cylinder 13. A constraint assembly 22 is fixedly connected to the piston rod of the second cylinder 212. The constraint assembly 22 includes a constraint plate 221, several connecting rods 222, several adjusting rods 223, and several limiting rods 224. The constraint plate 221 is vertically arranged and fixedly connected to the piston rod end of the second cylinder 212. One end of several connecting rods 222 is fixedly connected to the side of the constraint plate 221 away from the second cylinder 212, and the other end is fixedly connected to the adjusting rod 223. In this embodiment, two connecting rods 222 connect one adjusting rod 223 to the constraint plate 221. An adjusting rod 223 is provided on each side of the lifting assembly 24 to limit the position of the workpiece 104 to be welded.

[0036] The adjusting rod 223 is vertically arranged, and adjusting holes 225 are arranged in an array along its length. One end of the limiting rod 224 is threadedly connected to the adjusting hole 225, and the other end of the limiting rod 224 is used to abut against the workpiece 104 to achieve point contact with the workpiece 104. Each adjusting rod 223 is connected to at least two limiting rods 224 to limit the two workpieces 104 to be welded respectively, ensuring that the two workpieces 104 can remain relatively stationary.

[0037] Reference Figure 5The support frame 211 is equipped with an adjustment component 23, which includes a limiting cylinder 231 and a buffer rod 232. The limiting cylinder 231 is hollow and is bolted to the side of the support frame 211 away from the constraint plate 221. One end of the buffer rod 232 is fixedly connected to the constraint plate 221, and the other end is fixedly connected to a limiting ring 233. The diameter of the limiting ring 233 is larger than the diameter of the buffer rod 232. The buffer rod 232 is slidably connected to the limiting cylinder 231. Several crescent-shaped pieces 234 are detachably connected to the section of the buffer rod 232 between the limiting cylinder 231 and the limiting ring 233. The crescent-shaped pieces 234 are paired and fastened to the circumference of the buffer rod 232. Two mutually cooperating crescent-shaped pieces 234 are bolted together, thereby limiting the stroke of the buffer rod 232, and thus limiting the stroke of the second cylinder 212, preventing the second cylinder 212 from excessively compressing the workpiece 104 to be welded, and ensuring the quality of the workpiece 104.

[0038] Reference Figure 4 The lifting assembly 24 includes a third cylinder 241 and a third support plate 242. The third support plate 242 is perpendicular to the constraint plate 221 and the two are fixedly connected. The third cylinder 241 is fixedly connected to the bottom of the third support plate 242. The piston rod of the third cylinder 241 is slidably connected to the third support plate 242 in a direction away from the second support plate 213. The piston rod of the third cylinder 241 is connected to a flipping assembly 25.

[0039] The flipping assembly 25 includes a fourth support plate 251, a transmission component 252, and a rotary cylinder 253. The bottom of the fourth support plate 251 is fixedly connected to the piston rod end of the third cylinder 241. The fourth support plate 251 is arranged parallel to the top of the third support plate 242. In this embodiment, there are two ear plates 257, which are arranged parallel to each other and fixedly connected to the top of the fourth support plate 251. The opposite sides of the transmission component 252 are rotatably connected to one ear plate 257 respectively. The cylinder body of the rotary cylinder 253 is fixedly connected to the ear plate 257. One end of the transmission component 252 is fixedly connected to the rotating shaft of the rotary cylinder 253, and the other end is a free end. The rotary cylinder 253 drives the transmission component 252 toward the top of the workpiece 104 to be welded, so as to limit the workpiece 104 to be welded. The free end of the transmission component 252 is fixedly connected to a limiting plate 254. The limiting plate 254 has a plurality of limiting holes 255 arranged in an array. The limiting plate 254 has a plurality of limit rods 256 on the side facing away from the rotary cylinder 253. One end of the limit rod 256 is threadedly connected to the limiting hole 255, and the other end is used to abut against the top of the workpiece 104 to be welded.

[0040] The fourth support plate 251 has several directional components 26 on the side facing the third support plate 242. The directional components 26 include a directional cylinder 261 and a directional rod 262. The directional cylinder 261 is fixedly connected to the side of the third support plate 242 away from the fourth support plate 251. One end of the directional rod 262 is fixedly connected to the side of the fourth support plate 251 facing the third support plate 242. The other end of the directional rod 262 is fixedly connected to a directional ring 263. The diameter of the directional ring 263 is larger than the diameter of the directional rod 262, thereby limiting the stroke of the third cylinder 241 and reducing the risk of the tilting component 25 detaching from the third support plate 242.

[0041] It is worth noting that in this embodiment, the welding device is mounted on the frame 101 of the machine frame 101. The welding device is arranged in two rows and is fixedly connected to the machine frame 101 by the support member 111, and is used to clamp the workpiece 104 to be welded. The machine frame 101 is also equipped with an automatic welding robot 103 and several infrared sensors 102. The number of infrared sensors 102 corresponds one-to-one with the welding device. The first cylinder 13, the second cylinder 212, the third cylinder 241 and the rotary cylinder 253 are all electrically connected to the infrared sensors 102. When the infrared sensors 102 detect that the automatic welding robot 103 is close to the welding device, the second cylinder 212, the third cylinder 241 and the rotary cylinder 253 drive the corresponding structure to detach from the workpiece 104 to avoid interference with the automatic welding robot 103, so that the automatic welding robot 103 can achieve continuous automatic welding.

[0042] Two rows of welding devices are applied one to one to clamp the workpiece 104. In this embodiment, taking the welding of two U-shaped channel steels into a square tube as an example, the openings of the two U-shaped channel steels are set opposite each other. The first support plate 12 supports the U-shaped channel steel located at the bottom. The two welding devices work together to make the weld seams of the two U-shaped channels flush and keep them relatively stationary. The automatic welding robot 103 moves along the length of the U-shaped channel steel, thereby realizing automatic welding.

[0043] The implementation principle of the embodiment is as follows: After the two workpieces 104 to be welded are placed, the piston rod of the first cylinder 13 extends or retracts, causing the second support plate 213 to move up or down, so that the weld seam of the two workpieces 104 to be welded is located between the two limiting rods 224. The piston rod of the second cylinder 212 extends, causing the limiting rod 224 to abut against the workpiece 104 to be welded. The limiting rods 224 on both sides of the workpiece 104 to be welded cooperate with each other to clamp the workpiece 104 to be welded. Then the third cylinder 241 drives the third support plate 242 to move up or down, adjusting the position of the flipping assembly 25 relative to the workpiece 104 to be welded. The rotating cylinder 253 drives the limit rod 256 to flip and abut against the top of the workpiece 104 to be welded. The limit rod 256 cooperates with the first support plate 12 to limit the relative position of the two workpieces 104 to be welded to a relatively stable state.

[0044] During the welding process, when the infrared sensor 102 detects the approach of the automatic welding robot 103, it transmits an electrical signal to the nearby welding device. The rotary cylinder 253 then drives the limit rod 256 upwards, disengaging it from the top of the workpiece 104 to be welded. The second cylinder 212 then drives the limit rod 224 away from the welding surface of the workpiece 104, causing the limit rod 224 to move away from the workpiece 104, thus providing space for the automatic welding robot 103 to weld. When the automatic welding robot 103 moves to the next infrared sensor 102, the previous welding device engages with the workpiece 104, and the next welding device disengages from the workpiece 104, ensuring that the automatic welding robot 103 welds automatically and continuously.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A stitch welding device, characterized by: The device includes a first limiting mechanism (1) and a second limiting mechanism (2). The top of the liftable first limiting mechanism (1) is connected to the second limiting mechanism (2). The second limiting mechanism (2) includes a retractable pushing component (21), a lifting component (24), and a flipping component (25). The pushing component (21) is connected to the top of the first limiting mechanism (1), and the moving direction of the pushing component (21) is perpendicular to the length direction of the first limiting mechanism (1) to limit the side of the workpiece (104) to be welded. The liftable lifting component (24) is connected to the pushing component. The output end of (21) is connected to the output end of the lifting component (24). The flipping component (25) flips in the direction of extension and retraction of the pushing component (21). The flipping component (25) cooperates with the first limiting mechanism (1) to clamp the workpiece (104) to be welded in the vertical direction. The first limiting mechanism (1) includes a first support plate (12), a first cylinder (13) and several first guide components (11). One end of the retractable first guide component (11) is connected to the bottom of the pushing component (21), and the other end is used to connect to the frame (101). The first cylinder The cylinder body of (13) is connected to the first support plate (12). The piston rod of the first cylinder (13) is connected to the pushing assembly (21). The pushing assembly (21) includes a support frame (211), a second cylinder (212), and a second support plate (213). The second cylinder (212) is connected to the top of the second support plate (213) through the support frame (211). The bottom of the second support plate (213) is connected to the output end of the first limiting mechanism (1). The piston rod of the second cylinder (212) is connected to a constraint assembly (22). The constraint assembly (22) is vertically oriented. The lifting assembly (24) has at least two contact points for limiting at least two workpieces (104) to be welded. The lifting assembly (24) includes a third cylinder (241) and a third support plate (242). The third support plate (242) is connected to the constraint plate (221). The cylinder body of the third cylinder (241) is connected to the bottom of the third support plate (242). The piston rod of the third cylinder (241) is slidably connected to the third support plate (242) and fixedly connected to the flipping assembly (25). The central axis of the piston rod of the third cylinder (241) is parallel to the central axis of the piston rod of the first cylinder (13).

2. The splicing apparatus according to claim 1, characterized by: The constraint assembly (22) includes a constraint plate (221), a plurality of adjusting rods (223) and a plurality of limiting rods (224). The constraint plate (221) is connected to the piston rod end of the second cylinder (212). The plurality of adjusting rods (223) are connected to the constraint plate (221). The adjusting rods (223) are arranged in an array along the vertical direction with a plurality of adjusting holes (225). One end of the limiting rod (224) is detachably connected to any adjusting hole (225). The other end of the limiting rod (224) is used to abut against the workpiece (104) to be welded. Each adjusting rod (223) is connected to at least two limiting rods (224).

3. The splicing apparatus according to claim 2, characterized by: The support frame (211) is connected to an adjustment component (23). The adjustment component (23) includes a buffer rod (232), a crescent-shaped piece (234), and a limiting ring (233). One end of the buffer rod (232) is fixedly connected to the constraint plate (221), and the other end is fixedly connected to the limiting ring (233). The buffer rod (232) is slidably connected to the support frame (211). The central axis of the buffer rod (232) is parallel to the central axis of the piston rod of the second cylinder (212). The crescent-shaped piece (234) is detachably connected to the buffer rod (232) section between the support frame (211) and the limiting ring (233).

4. The splicing apparatus according to claim 1, characterized by: The flipping assembly (25) includes a fourth support plate (251), a transmission component (252), and a rotary cylinder (253). The cylinder body of the rotary cylinder (253) is connected to the top of the fourth support plate (251). The rotating shaft of the rotary cylinder (253) is connected to one end of the transmission component (252). The end of the transmission component (252) away from the rotary cylinder (253) is a free end, which is used to rotate the transmission component (252) and abut against the top of the workpiece (104).

5. The splicing apparatus according to claim 1, characterized by: The top of the first support plate (12) is provided with a reinforcing component (14). The reinforcing component (14) includes a guide plate (141), a first reinforcing plate (142), and a second reinforcing plate (143). The guide plate (141) abuts against the side of the second limiting mechanism (2) away from the workpiece (104) to be welded. The first reinforcing plate (142) is arranged along the length direction of the guide plate (141) and connected to the side of the guide plate (141) facing the second limiting mechanism (2). One side of the second reinforcing plate (143) is connected to the guide plate (141), and the other side is connected to the first support plate (12).

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