A continuous roll production line of color plate on-line arc welding overlap device

Abstract

The present application relates to the technical field of color steel plate, and discloses a color steel plate continuous rolling production line online arc welding joint device, which comprises a rolling device, a front mounting frame and a rear mounting frame, the front mounting frame and the rear mounting frame are mutually symmetrical, the front mounting frame and the rear mounting frame are respectively located on the side wall of the rolling device, a plurality of transmission rollers are arranged on the front mounting frame and the rear mounting frame at equal intervals, a plurality of support legs which are mutually symmetrical in pairs are arranged on the bottom of the front mounting frame and the rear mounting frame, and a front color steel plate and a rear color steel plate are respectively transmitted above the front mounting frame and the rear mounting frame. Through the driving assembly, the positioning block can clamp the side wall of the color steel plate, so that the joint alignment is ensured; meanwhile, the moving wheels of the lower moving plate and the upper moving plate can press the color steel plate, so that the stability is improved; the plug-in plate cooperates with the plug-in barrel to block the movement of the color steel plate, so that the positioning is assisted, and then the online arc welding of the joint of the front color steel plate and the rear color steel plate is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of color steel plate technology, specifically, it relates to an online arc welding joint device for a continuous roll forming production line of color steel plates. Background Technology

[0002] In the fields of construction materials, home appliance manufacturing, and transportation, color steel sheets have seen a continuous increase in demand due to their advantages such as lightweight, high strength, corrosion resistance, beautiful appearance, and convenient installation. To meet the needs of large-scale production, continuous roll forming production lines for color steel sheets have become the mainstream production equipment in the industry. This production line achieves efficient processing of color steel sheets through continuous roll forming technology. The online arc welding process at the joint between the front and rear sections of the color steel sheets is the core link to ensure the integrity of continuous forming, structural strength, and sealing performance of the color steel sheets, which directly determines the final product quality and production efficiency.

[0003] Currently, when performing online arc welding operations on continuous roll forming production lines for color steel plates, existing equipment is unable to effectively constrain the displacement of the color steel plates in the conveying direction and vertical direction. The color steel plates are prone to shaking or shifting due to the impact force of roll forming and the heat deformation during welding, resulting in poor weld stability during arc welding.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: An online arc welding joint device for a continuous roll forming production line of color steel plates includes a roll forming device, a front mounting frame, and a rear mounting frame. The front and rear mounting frames are symmetrical to each other and are located on one side wall of the roll forming device. Multiple equidistantly distributed transfer rollers are arranged on the front and rear mounting frames. Multiple symmetrically arranged support legs are provided at the bottom of both the front and rear mounting frames. A front color steel plate and a rear color steel plate are respectively conveyed above the front and rear mounting frames. Multiple equidistantly distributed positioning blocks are arranged on the side walls of the front and rear color steel plates within the front and rear mounting frames, and each positioning block is symmetrical to each other. A lower moving plate and an upper moving plate are respectively arranged between the front and rear color steel plates, and multiple support legs are arranged on the opposite side walls of the lower and upper moving plates. The lower and upper swing arms each have a moving wheel at one end away from the lower and upper moving plates, respectively. Each moving wheel is symmetrical to the others and located on the lower and upper moving plates. Two symmetrical flip plates are also provided on one side wall of each of the lower and upper moving plates. A plug-in plate and a plug-in cylinder are respectively provided at one end of each of the lower and upper moving plates, with the plug-in plate movably inserted into the inner cavity of the plug-in cylinder. A protective housing is provided at the bottom of the front and rear mounting frames. A driving assembly is provided within the protective housing. The driving assembly drives the positioning block to clamp the front and rear color steel plates being transported. The driving assembly also drives the lower moving plate to move vertically, the lower moving plate drives the flip plate to rotate, and the flip plate drives the upper moving plate to move vertically.

[0006] In a preferred embodiment of the present invention, a placement slot is provided in the middle of the upper part of the protective shell, a wedge block is provided above the placement slot, the wedge block is provided on the lower moving plate, and two moving slots are also provided on the protective shell, the two moving slots being symmetrical to each other.

[0007] In a preferred embodiment of the present invention, the drive assembly includes a servo motor disposed on the outer wall of the protective housing. The output end of the servo motor is provided with a positive thread rod, which movably passes through the protective housing. A negative thread rod is provided at the end of the positive thread rod away from the servo motor, and the end of the negative thread rod away from the positive thread rod is rotatably disposed on the inner wall of the protective housing.

[0008] In a preferred embodiment of the present invention, threaded sleeves are engaged on both the positive threaded rod and the negative threaded rod, and L-shaped connecting rods are provided on each threaded sleeve. The two L-shaped connecting rods are symmetrical to each other. A connecting rod is provided above each of the two L-shaped connecting rods. The two connecting rods are symmetrical to each other. A guide rod is movably passed through each of the two threaded sleeves, and the two ends of the two guide rods are respectively provided on the inner wall of the protective shell.

[0009] In a preferred embodiment of the present invention, a placement plate is provided above each of the two L-shaped connecting rods. The two placement plates are symmetrical to each other. A plurality of positioning blocks are provided on the opposite side wall of the two placement plates. Each positioning block is movably inserted through the front mounting frame and the rear mounting frame.

[0010] In a preferred embodiment of the present invention, each of the two L-shaped connecting rods is provided with an extrusion plate on one of its opposite sidewalls. The two extrusion plates are symmetrical to each other and are respectively aligned with the inclined surface of the wedge block. The wedge block is slidably disposed on the inner wall of the placement slot.

[0011] In a preferred embodiment of the present invention, the sidewalls of the lower moving plate and the upper moving plate are respectively provided with two lower driving plates and an upper driving plate, and the two lower driving plates and the upper driving plates are symmetrical to each other.

[0012] In a preferred embodiment of the present invention, four symmetrical connecting plates are respectively provided on the upper two side walls of the upper movable plate. A circular slot is opened in the middle of each of the four connecting plates, and a sliding rod is movably inserted through the inner cavity of the circular slot. The four sliding rods are symmetrical to each other, and a limit ring is provided at the top of each of the four sliding rods. A front mounting bracket and a rear mounting bracket are respectively provided at the bottom of the four sliding rods.

[0013] In a preferred embodiment of the present invention, each of the four sliding rods is further fitted with a return spring. One end of each of the four return springs is respectively mounted on the front mounting bracket and the rear mounting bracket, and the other end of each of the four return springs is respectively mounted on the bottom of the connecting plate.

[0014] In a preferred embodiment of the present invention, a fixing plate is provided on one side wall of both the front mounting bracket and the rear mounting bracket. The two fixing plates are symmetrical to each other. A bearing is provided on the opposite side wall of the two fixing plates. The two bearings are symmetrical to each other. A rotating rod is provided in the inner cavity of each of the two bearings. The two rotating rods are symmetrical to each other. A flipping plate is provided on each of the two rotating rods. The two ends of the two flipping plates are respectively attached to the lower drive plate and the upper drive plate.

[0015] Compared with the prior art, the present invention has the following advantages: This invention enables the positioning block to clamp the side wall of the color steel plate through the driving component, ensuring the alignment of the joint; at the same time, the moving wheels of the lower moving plate and the upper moving plate can press the color steel plate to improve stability; the plug plate and plug cylinder can block the movement of the color steel plate and assist in positioning, thereby facilitating the subsequent online arc welding of the joint of the front and rear color steel plates.

[0016] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram of an online arc welding joint device for a continuous roll forming production line of color steel plates; Figure 2 A bottom view schematic diagram of an online arc welding joint device for a continuous roll forming production line of color steel plates; Figure 3 A side view of an online arc welding joint device for a continuous roll forming production line of color steel plates; Figure 4 A schematic diagram of the mounting frame structure for an online arc welding joint device in a continuous roll forming production line for color steel sheets; Figure 5 A cross-sectional structural schematic diagram of the front mounting frame of an online arc welding joint device for a continuous roll forming production line of color steel plates; Figure 6 A schematic diagram of the swing arm structure of an online arc welding joint device for a continuous roll forming production line of color steel plates; Figure 7 This is a bottom view schematic diagram of the protective shell structure of an online arc welding joint device for a continuous roll forming production line of color steel plates.

[0018] In the picture: 1. Roller pressing device; 11. Front mounting frame; 111. Rear mounting frame; 112. Support leg; 113. Conveyor roller; 12. Protective housing; 121. Moving slot; 122. Placement slot; 13. Front color steel plate; 131. Rear color steel plate; 2. Servo motor; 21. Positive thread rod; 211. Negative thread rod; 212. Threaded sleeve; 214. Guide rod; 22. L-shaped connecting rod; 221. Connecting rod; 222. Extrusion plate; 23. Placement plate; 231. Positioning block; 24. Wedge block; 3. Lower moving plate; 31. Insertion plate; 312. Lower swing arm; 313. Lower drive plate; 32. Upper moving plate; 321. Insertion cylinder; 322. Upper swing arm; 323. Moving wheel; 324. Upper drive plate; 33. Connecting plate; 331. Sliding rod; 332. Return spring; 333. Limit ring; 4. Fixing plate; 41. Bearing; 411. Rotating rod; 412. Flipping plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0020] Example 1: like Figures 1 to 7 As shown, an online arc welding joint device for a continuous roll forming production line of color steel sheet includes a roll forming device 1, a front mounting frame 11, and a rear mounting frame 111. The front mounting frame 11 and the rear mounting frame 111 are symmetrical to each other and are located on one side wall of the roll forming device 1. Multiple transmission rollers 113 are equidistantly distributed on the front mounting frame 11 and the rear mounting frame 111. Multiple symmetrical support legs are provided at the bottom of the front mounting frame 11 and the rear mounting frame 111. 112. A front corrugated steel plate 13 and a rear corrugated steel plate 131 are respectively mounted above the front mounting frame 11 and the rear mounting frame 111; multiple positioning blocks 231 are equidistantly distributed on the side walls of the front corrugated steel plate 13 and the rear corrugated steel plate 131 respectively inside the front mounting frame 11 and the rear mounting frame 111, and each positioning block 231 is symmetrical to each other; a lower moving plate 3 and an upper moving plate 32 are respectively arranged between the front corrugated steel plate 13 and the rear corrugated steel plate 131, and the opposite side walls of the lower moving plate 3 and the upper moving plate 32 are respectively provided with There are multiple lower swing arms 312 and upper swing arms 322. Each lower swing arm 312 and upper swing arm 322 has a moving wheel 323 at one end away from the lower moving plate 3 and the upper moving plate 32, respectively. Each moving wheel 323 is symmetrical to each other and is located on the lower moving plate 3 and the upper moving plate 32, respectively. Two flip plates 412 are also provided on one side wall of the lower moving plate 3 and the upper moving plate 32. The two flip plates 412 are symmetrical to each other. One end of the lower moving plate 3 and the upper moving plate 32 is respectively provided with a plug plate 31 and a... The plug-in sleeve 321 has a plug-in plate 31 that is movably inserted into its inner cavity. Protective housings 12 are provided at the bottom of the front mounting bracket 11 and the rear mounting bracket 111. A drive assembly is provided within the protective housing 12. This drive assembly drives the positioning block 231 to clamp the front and rear color steel plates 131. The drive assembly also drives the lower moving plate 3 to move vertically. The lower moving plate 3 drives the rotating plate 412 to rotate, and the rotating plate 412 drives the upper moving plate 32 to move vertically. The drive assembly allows the positioning block 231 to clamp the sidewalls of the color steel plates, ensuring alignment of the joints. Simultaneously, the moving wheels 323 of the lower and upper moving plates 32 press down on the color steel plates, improving stability. The plug-in plate 31, in conjunction with the plug-in sleeve 321, can prevent the color steel plates from moving, assisting in positioning and facilitating subsequent online arc welding of the joints of the front and rear color steel plates 131.

[0021] like Figures 1 to 7 As shown, in a specific embodiment, a placement slot 122 is provided in the middle of the upper part of the protective housing 12, and a wedge block 24 is provided above the placement slot 122. The wedge block 24 is provided on the lower moving plate 3. Two moving slots 121 are also provided on the protective housing 12, and the two moving slots 121 are symmetrical to each other. In this configuration, the protective housing 12 is a component.

[0022] Example 2: The difference between Embodiment 1 and this embodiment is that: Figures 1 to 7 As shown, an online arc welding joint device for a continuous roll forming production line of color steel plates includes a drive assembly comprising a servo motor 2. The servo motor 2 is mounted on the outer wall of a protective housing 12. A positive threaded rod 21 is provided at the output end of the servo motor 2, movably penetrating the protective housing 12. A negative threaded rod 211 is provided at the end of the positive threaded rod 21 away from the servo motor 2, and the end of the negative threaded rod 211 away from the positive threaded rod 21 is rotatably mounted on the inner wall of the protective housing 12. In this configuration, the installation position and components of the drive assembly are defined.

[0023] like Figures 1 to 7 As shown in the specific embodiment, both the positive thread rod 21 and the negative thread rod 211 are fitted with threaded sleeves 212, and each threaded sleeve 212 is provided with an L-shaped connecting rod 22. The two L-shaped connecting rods 22 are symmetrical to each other. Each L-shaped connecting rod 222 is provided with a connecting rod 221 above it. The two connecting rods 221 are also symmetrical to each other. Guide rods 214 are movably passed through each of the two threaded sleeves 212, and the two ends of the two guide rods 214 are respectively provided on the inner wall of the protective shell 12. In this configuration, the threaded sleeves 212 can move horizontally.

[0024] like Figures 1 to 7 As shown, furthermore, a placement plate 23 is respectively provided above the two L-shaped connecting rods 221. The two placement plates 23 are symmetrical to each other, and multiple positioning blocks 231 are provided on the opposite side walls of the two placement plates 23. Each positioning block 231 is movably inserted through the front mounting bracket 11 and the rear mounting bracket 111. In this configuration, the specific installation position of the positioning block 231 is determined.

[0025] like Figures 1 to 7 As shown, furthermore, each of the two L-shaped connecting rods 22 has a pressing plate 222 on one of its opposite sidewalls. The two pressing plates 222 are symmetrical to each other and are respectively aligned with the inclined surface of the wedge block 24. The wedge block 24 is slidably disposed on the inner wall of the placement slot 122. In this configuration, the wedge block 24 can move vertically.

[0026] Example 3: The difference between Embodiment 2 and this embodiment is that: Figures 1 to 7 As shown, an online arc welding joint device for a continuous roll forming production line of color steel plates includes two lower drive plates 313 and an upper drive plate 324 respectively installed on the side walls of the lower moving plate 3 and the upper moving plate 32, with the lower drive plates 313 and the upper drive plates 324 being symmetrical to each other. The installation positions of the lower drive plates 313 and the upper drive plates 324 in this configuration are also shown.

[0027] like Figures 1 to 7As shown in the specific embodiment, four symmetrical connecting plates 33 are respectively provided on the upper two side walls of the upper movable plate 32. Each of the four connecting plates 33 has a circular slot in the middle, and a sliding rod 331 movably passes through the inner cavity of the circular slot. The four sliding rods 331 are symmetrical to each other, and each of the four sliding rods 331 has a limit ring 333 at its top. The bottom of each of the four sliding rods 331 is respectively provided on a front mounting bracket 11 and a rear mounting bracket 111. Each of the four sliding rods 331 is also fitted with a return spring 332. One end of each return spring 332 is respectively provided on the front mounting bracket 11 and the rear mounting bracket 111, and the other end is respectively provided on the bottom of the connecting plate 33. This configuration ensures that the upper movable plate 32 can move vertically.

[0028] like Figures 1 to 7 As shown, furthermore, a fixing plate 4 is provided on one side wall of both the front mounting bracket 11 and the rear mounting bracket 111. The two fixing plates 4 are symmetrical to each other. A bearing 41 is provided on the opposite side wall of each of the two fixing plates 4. The two bearings 41 are symmetrical to each other. A rotating rod 411 is provided in the inner cavity of each of the two bearings 41. The two rotating rods 411 are symmetrical to each other. A flipping plate 412 is provided on each of the two rotating rods 411. The two ends of the two flipping plates 412 are respectively attached to the lower drive plate 313 and the upper drive plate 324. In this configuration, the flipping plate 412 can rotate.

[0029] The implementation principle of the online arc welding joint device for a continuous roll forming production line of color steel sheet according to the present invention is as follows: First, the staff operates the roller pressing device 1 to roll the front color steel plate 13 and the rear color steel plate 131 into shape in sequence. Then, the color steel plate 13 and the rear color steel plate 131 are transported to the front mounting frame 11 and the rear mounting frame 111. At this time, the staff controls the drive assembly set on the outer wall of the protective shell 12 to operate. After the servo motor 2 in the drive assembly is started, its output end drives the positive thread rod 21 that moves through the protective shell 12 to rotate. The negative thread rod 211 connected to the end of the positive thread rod 21 away from the servo motor 2 rotates on the inner wall of the protective shell 12. Since both the positive thread rod 21 and the negative thread rod 211 are fitted with threaded sleeves 212, the two threaded sleeves 212 move relatively horizontally along the positive thread rod 21 and the negative thread rod 211 respectively under the action of thread transmission. Therefore, the threaded sleeves 212 can drive the L-shaped connecting rod 22 to move horizontally. As the threaded sleeve 212 moves the L-shaped connecting rod 22, the L-shaped connecting rod 22 moves the placement plate 23 horizontally in sync via the connecting rod 221. Multiple equidistantly distributed positioning blocks 231, located on opposite side walls of the placement plate 23, then move through the front mounting bracket 11 and the rear mounting bracket 111, gradually approaching the side walls of the front and rear color steel plates 131. Simultaneously, the L-shaped connecting rod 22 moves the extrusion plate 222, which extrudes the inclined surface of the wedge block 24, causing the wedge block 24 to overcome resistance and move the lower moving plate 3 vertically upwards. Because the lower moving plate 3 has two mutually symmetrical lower drive plates 313 fixed to its side wall, and the upper moving plate 32 has two mutually symmetrical upper drive plates 324 fixed to its side wall, and both the front mounting bracket 11 and the rear mounting bracket 111 have mutually symmetrical fixing plates 4 fixed to their side walls, and both fixing plates 41 have mutually symmetrical bearings 41 fixed to their opposite side walls, with mutually symmetrical rotating rods 411 rotatably mounted inside the bearings 41. A flip plate 412 is fixed to the rotating rod 411, with its two ends respectively attached to the lower drive plate 313 and the upper drive plate 324. When the lower moving plate 3 moves vertically upward, the lower drive plate 313 pushes the flip plate 412 to rotate around the rotating rod 411, and the rotating flip plate 412 then pushes the upper drive plate 324 to move the upper moving plate 32 vertically downward; four mutually symmetrical connecting plates 33 are fixed to the upper two side walls of the upper moving plate 32. Each connecting plate 33 has a circular slot in the middle through which a sliding rod 331 is movably inserted. The four sliding rods 331 are symmetrical in pairs. Each of them has a limit ring 333 fixed at the top and a bottom fixed on the front mounting bracket 11 and the rear mounting bracket 111, respectively. A return spring 332 is also sleeved on the sliding rod 331. One end of the return spring 332 is fixed on the front mounting bracket 11 or the rear mounting bracket 111, and the other end is fixed on the bottom of the connecting plate 33. During the vertical movement of the upper moving plate 32, the connecting plate 33 slides stably along the sliding rod 331, and the return spring 332 expands and contracts accordingly. At the same time, multiple lower swing arms 312 and upper swing arms 322 are respectively provided on the opposite side walls of the lower moving plate 3 and the upper moving plate 32. The moving wheels 323 are provided at the ends away from the moving plates, so that the moving wheels 323 can press on the front color steel plate 13 and the rear color steel plate 131. The insertion plate 31 at one end of the lower moving plate 3 moves upward with the lower moving plate 3, and the insertion cylinder 321 at one end of the upper moving plate 32 moves downward with the upper moving plate 32. Finally, the insertion plate 31 is movably inserted into the inner cavity of the insertion cylinder 321, thereby blocking the transmission of the front color steel plate 13 and the rear color steel plate 131 and preventing them from continuing to move. At the same time, the placement plate 23 drives the positioning block 231 to move continuously until the positioning block 231 is in close contact with the side walls of the front color steel plate 13 and the rear color steel plate 131, so as to straighten and position the front color steel plate 13 and the rear color steel plate 131 after being limited, and ensure that the joint of the two is aligned, so as to facilitate the subsequent online arc welding operation at the joint of the front color steel plate 13 and the rear color steel plate 131 (the specific welding is existing technology).

Claims

1. An online arc welding joint device for a continuous roll forming production line of color steel sheet, comprising a roll forming device (1), a front mounting frame (11), and a rear mounting frame (111), characterized in that: The front mounting frame (11) and the rear mounting frame (111) are symmetrical to each other. The front mounting frame (11) and the rear mounting frame (111) are respectively located on one side wall of the roller pressing device (1). The front mounting frame (11) and the rear mounting frame (111) are respectively provided with a plurality of equally spaced transmission rollers (113). The bottom of the front mounting frame (11) and the rear mounting frame (111) are each provided with a plurality of mutually symmetrical support legs (112). The front color steel plate (13) and the rear color steel plate (131) are respectively conveyed above the front mounting frame (11) and the rear mounting frame (111). The front mounting bracket (11) and the rear mounting bracket (111) are provided with a plurality of positioning blocks (231) that are equally distributed on the side walls of the front color steel plate (13) and the rear color steel plate (131), respectively, and each positioning block (231) is symmetrical to each other; A lower moving plate (3) and an upper moving plate (32) are respectively provided between the front color steel plate (13) and the rear color steel plate (131). A plurality of lower swing arms (312) and upper swing arms (322) are respectively provided on the opposite side wall of the lower moving plate (3) and the upper moving plate (32). Each lower swing arm (312) and upper swing arm (322) is provided with a moving wheel (323) at the end away from the lower moving plate (3) and the upper moving plate (32). Each moving wheel (323) is symmetrical to each other and is located on the lower moving plate (3) and the upper moving plate (32). Two flip plates (412) are also provided on one side wall of the lower moving plate (3) and the upper moving plate (32). The two flip plates (412) are symmetrical to each other. One end of the lower moving plate (3) and the upper moving plate (32) is respectively provided with a plug plate (31) and a plug tube (321). The plug plate (31) is movably inserted into the inner cavity of the plug tube (321). The front mounting bracket (11) and the rear mounting bracket (111) are provided with protective housings (12) at their bottoms. The inner cavity of the protective housing (12) is provided with a driving assembly. The driving assembly is used to drive the positioning block (231) to clamp the front color steel plate (13) and the rear color steel plate (131) being transported. The driving assembly is also used to drive the lower moving plate (3) to move vertically. The lower moving plate (3) is used to drive the flipping plate (412) to rotate, and the flipping plate (412) is used to drive the upper moving plate (32) to move vertically.

2. The online arc welding joint device for a continuous roll forming production line of color steel sheet according to claim 1, characterized in that, The protective housing (12) has a placement slot (122) in the middle of its upper part. A wedge block (24) is provided above the placement slot (122). The wedge block (24) is provided on the lower moving plate (3). The protective housing (12) also has two moving slots (121) which are symmetrical to each other.

3. The online arc welding joint device for a continuous roll forming production line of color steel sheet according to claim 1, characterized in that, The drive assembly includes a servo motor (2), which is disposed on the outer wall of the protective housing (12). The output end of the servo motor (2) is provided with a positive thread rod (21), which is movably inserted through the protective housing (12). The end of the positive thread rod (21) away from the servo motor (2) is provided with a negative thread rod (211), and the end of the negative thread rod (211) away from the positive thread rod (21) is rotatably disposed on the inner wall of the protective housing (12).

4. The online arc welding joint device for a continuous roll forming production line of color steel sheet according to claim 3, characterized in that, Both the positive thread rod (21) and the negative thread rod (211) are fitted with threaded sleeves (212), and each threaded sleeve (212) is provided with an L-shaped connecting rod (22). The two L-shaped connecting rods (22) are symmetrical to each other. Each of the two L-shaped connecting rods (22) is provided with a connecting rod (221) above it. The two connecting rods (221) are symmetrical to each other. Each of the two threaded sleeves (212) is movably connected with a guide rod (214), and the two ends of the two guide rods (214) are respectively provided on the inner wall of the protective shell (12).

5. The online arc welding joint device for a continuous roll forming production line of color steel sheet according to claim 4, characterized in that, Above the two L-shaped connecting rods (221), a placement plate (23) is provided. The two placement plates (23) are symmetrical to each other. On the opposite side wall of the two placement plates (23), a plurality of positioning blocks (231) are provided. Each positioning block (231) moves through the front mounting frame (11) and the rear mounting frame (111).

6. The online arc welding joint device for a continuous roll forming production line of color steel sheet according to claim 4, characterized in that, Each of the two L-shaped connecting rods (22) has an extrusion plate (222) on one side wall opposite to the other. The two extrusion plates (222) are symmetrical to each other. The two extrusion plates (222) are respectively aligned with the inclined surface of the wedge block (24), and the wedge block (24) is slidably disposed on the inner wall of the placement slot (122).

7. The online arc welding joint device for a continuous roll forming production line of color steel sheet according to claim 1, characterized in that, The sidewalls of the lower moving plate (3) and the upper moving plate (32) are also provided with two lower driving plates (313) and an upper driving plate (324), respectively, and the two lower driving plates (313) and the upper driving plates (324) are symmetrical to each other.

8. The online arc welding joint device for a continuous roll forming production line of color steel sheet according to claim 7, characterized in that, The upper movable plate (32) is also provided with four symmetrical connecting plates (33) on the upper two side walls. Each of the four connecting plates (33) has a circular slot in the middle, and a sliding rod (331) moves through the inner cavity of the circular slot. The four sliding rods (331) are symmetrical to each other. Each of the four sliding rods (331) has a limit ring (333) at the top. The bottom of the four sliding rods (331) is provided with a front mounting bracket (11) and a rear mounting bracket (111) respectively.

9. The online arc welding joint device for a continuous roll forming production line of color steel sheet according to claim 8, characterized in that, Each of the four sliding rods (331) is also fitted with a return spring (332). One end of each of the four return springs (332) is set on the front mounting bracket (11) and the rear mounting bracket (111), and the other end of each of the four return springs (332) is set on the bottom of the connecting plate (33).

10. The online arc welding joint device for a continuous roll forming production line of color steel sheet according to claim 1, characterized in that, The front mounting bracket (11) and the rear mounting bracket (111) are each provided with a fixing plate (4) on one side wall. The two fixing plates (4) are symmetrical to each other. The opposite side wall of the two fixing plates (4) is provided with a bearing (41). The two bearings (41) are symmetrical to each other. The inner cavity of the two bearings (41) is provided with a rotating rod (411). The two rotating rods (411) are symmetrical to each other. The two rotating rods (411) are each provided with a flip plate (412). The two ends of the two flip plates (412) are respectively attached to the lower drive plate (313) and the upper drive plate (324).

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