Automated welding system for galvanized steel strip joints

Abstract

This invention provides an automatic welding system for galvanized steel strip joints, including a welding assembly, an upstream docking assembly, a downstream docking assembly, and a backing plate assembly. The upstream and downstream docking assemblies are capable of relative movement. The actuating end of the backing plate assembly can rise and fall. When the actuating end rises to its limit position, it positions the upstream and downstream steel strip joints. When the actuating end falls to its limit position, it cushions the welding of the upstream and downstream steel strip joints. In this automatic welding system, the upstream docking assembly moves the welding end of the upstream steel strip to one side of the backing plate assembly, positioning the origin of the upstream steel strip welding end. The downstream docking assembly moves the welding end of the downstream steel strip to the other side of the backing plate assembly, positioning the origin of the downstream steel strip welding end. After the two origins are aligned, the welding assembly welds them together, ensuring welding quality and enabling automatic centering alignment, thus reducing the labor intensity of workers.

Description

Technical Field

[0001] This invention belongs to the field of straight seam welded pipe production, and in particular relates to an automatic welding system for galvanized steel strip joints. Background Technology

[0002] Straight seam welded pipe is a steel pipe made by rolling long strips of steel of a certain specification into a round tube shape and welding them with a straight seam using a high-frequency welding unit. Due to its high hardness and smooth surface, straight seam welded pipe has been widely used in some industries that were previously considered seamless steel pipes, such as automotive transmission pipes, boiler pressure pipes, oil casing, and oil and gas transmission pipes. In existing technologies, the coil lengths of long steel strips vary, with thicker strips typically having shorter coil lengths. Since straight seam welded pipe production is continuous, after each steel strip is unwound, the upstream and downstream strips need to be welded together to achieve continuous production without stopping. Currently, the production method involves workers cutting off the ends of the upstream and downstream strips, fixing them on fixtures, and then manually welding them. Both the upstream and downstream strips are wound on the reel at this point, resulting in high unwinding tension and weight, making it difficult for workers to move them. Furthermore, placing them on fixtures makes it inconvenient to align the two joints, leading to high labor intensity and low splicing efficiency. Summary of the Invention

[0003] In view of this, the present invention aims to provide an automatic welding system for galvanized steel strip joints to solve the problem that in the production of rolled steel strips, manual alignment and straightening of raw materials is required, which is labor-intensive and inefficient.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] An automatic welding system for galvanized steel strip joints includes a welding assembly, an upstream docking assembly, a downstream docking assembly, and a backing plate assembly. The backing plate assembly is positioned below the welding assembly. The upstream and downstream docking assemblies are respectively positioned on either side of the backing plate assembly, facing each other. The upstream docking assembly clamps the upstream steel strip joint, and the downstream docking assembly clamps the downstream steel strip joint. The welding assembly welds the upstream and downstream steel strip joints, and the backing plate assembly serves as a support for the welding process. The upstream and downstream docking assemblies are capable of relative movement, and the actuating end of the backing plate assembly is capable of rising and falling. The actuating end, when raised to its limit position, positions the upstream and downstream steel strip joints, and when lowered to its limit position, it supports the welding of the upstream and downstream steel strip joints.

[0006] Furthermore, the liner assembly includes a first linear module, a liner body, a first slide table, and a first carriage. The two ends of the liner body are respectively installed with the first slide table. The periphery of each first slide table is slidably connected to one side of a first carriage. The two first carriages are arranged opposite to each other. Each first carriage is fixedly installed on the foundation. The lower end of the liner body is fixedly installed to the movable end of the first linear module. The first linear module is fixedly installed on the foundation. The upper end of the liner body is used to pad the welding of the upstream strip steel joint and the downstream strip steel joint.

[0007] Furthermore, an alignment plate is provided on each side of the liner body, and the two alignment plates correspond to the upstream docking component and the downstream docking component, respectively. Multiple alignment posts are provided on the side of each alignment plate away from the upstream docking component or the downstream docking component. Multiple alignment holes are provided on each side of the liner body, and each alignment hole corresponds to an alignment post. The outer periphery of the alignment post is slidably connected to an alignment hole, and the alignment hole is a blind hole. One end of the alignment post is elastically connected to the bottom of the alignment hole through a first spring.

[0008] Furthermore, the alignment plate is also provided with an abutting post, which abuts against the same side of the alignment post. The abutting post and the alignment post are arranged parallel to each other. The liner body is provided with a corresponding mounting hole, and a first touch switch is installed in the mounting hole. One end of the abutting post can abut against the execution end of the first touch switch.

[0009] Furthermore, the mounting hole is a blind hole, one end of the first touch switch is elastically connected to the bottom of the mounting hole through a second spring, and the other end of the first touch switch is the actuation end;

[0010] Furthermore, the end of the abutment post that contacts the first actuating switch has a frustum structure.

[0011] Furthermore, the welding assembly includes a second linear module, a second slide table, a third linear module, and a welding head. The welding head is fixedly installed to the movable end of the third linear module, the third linear module is fixedly installed to the second slide table, the second slide table is fixedly installed to the movable end of the second linear module, and the second linear module is fixedly installed on the foundation. The third linear module is used to drive the welding head closer to or away from the object to be welded, and the second linear module is used to drive the second slide table and the welding head to slide laterally.

[0012] Furthermore, a grinding assembly is provided on the second slide, and the grinding assembly and the welding head are arranged parallel to each other. The grinding assembly includes a fourth linear module, a first guide rail, a first support plate, a second slide, and a grinding head. The fourth linear module is fixedly installed on the second slide, and the first support plate is installed on the movable end of the fourth linear module. One side of the first support plate is slidably connected to the first guide rail, and the first guide rail is fixedly installed on the second slide. One end of the first support plate is installed with the second slide via a first support rod. The upstream docking assembly and the downstream docking assembly are respectively provided with a grinding head. Each grinding head is slidably connected to the second slide via a third slide, and the two third slides are arranged opposite to each other. A grinding motor is provided on each third slide, and the grinding head is installed at the output end of the grinding motor.

[0013] Furthermore, the grinding head is used to grind the surface to be welded on the upstream or downstream strip joint, and the lower end of the grinding head is a frustum structure. A retaining spring is provided on the side of the third slide away from the upstream or downstream strip joint. One end of the retaining spring is elastically connected to the inner end wall of the second slide. A second guide rail is provided on the second slide, and a guide hole is provided on the third slide. The outer periphery of the second guide rail is slidably connected to the guide hole.

[0014] Furthermore, the upstream docking assembly and the downstream docking assembly have the same structure. The upstream docking assembly includes a centering unit, a clamping unit, a conveying unit, and a easing unit. The easing unit is installed on the foundation, and a platform is installed on the moving end of the easing unit. The conveying unit, the centering unit, and the clamping unit are arranged sequentially on the platform along the traveling direction of the strip. The clamping unit is located on one side of the liner assembly and is used to clamp the end of the strip to be welded. The easing unit drives the end of the strip to be welded to approach or move away from the liner assembly through the platform and the clamping unit. The two sides of the strip to be welded abut against the inner side of the centering unit. The centering unit is used to position the relative position of the strip to be welded on the platform, and the conveying unit is used to drive the strip to move linearly on the platform.

[0015] Furthermore, the clamping unit includes an upper pad and a lower pad. The lower pad is mounted on the frame and located on one side of the liner assembly. The upper pad and the lower pad are arranged parallel to each other. The upper pad is fixedly mounted to the movable end of the fifth linear module. The fifth linear module is fixedly mounted to the second support plate. The second support plate is mounted on the frame through a second support rod. The upper pad is provided with a plurality of first sliding holes. The periphery of each second support rod is slidably connected to a first slider.

[0016] Furthermore, the easing unit includes a third support plate, a fourth support plate, a third guide rail, a first lead screw, a first support platform, and a second support platform. The third and fourth support plates are arranged parallel to each other and are respectively installed on the foundation. The periphery of the first lead screw is rotatably connected to the third and fourth support plates. A third guide rail is provided on each side of the first lead screw, and the periphery of each third guide rail is fixedly installed on the third and fourth support plates. The lower end of the platform is fixedly installed with the first and second support platforms, which are arranged parallel to each other. The first and second support platforms are respectively provided with multiple support sliding holes for sliding connection to the periphery of the third guide rail or to avoid the first lead screw. A lead screw nut is installed on the first or second support platform, and the periphery of the first lead screw is threaded to the periphery of the lead screw nut. One end of the first lead screw is fixedly connected to the output end of the servo motor, and the servo motor is fixedly installed on the foundation.

[0017] Furthermore, the centering unit includes two clamping heads, which are arranged opposite to each other. The frame is provided with a sliding groove, and the middle part of each clamping head is slidably connected to the sliding groove. The upper inner side of the clamping head can abut against one side of the strip steel, and the lower inner side of the clamping head can abut against one end of an adjusting head. The adjusting head is installed on the lower side of the frame, and the two adjusting heads are arranged opposite to each other.

[0018] Furthermore, the adjusting head includes a fixed plate, an abutment plate, and an adjusting screw. The fixed plate is fixedly installed on the lower side of the frame, the outer thread of the adjusting screw is connected to the fixed plate, and one end of the adjusting screw is rotatably connected to the abutment plate.

[0019] Furthermore, one side of the clamping head can be grounded onto the abutting plate, and the other side of the clamping head is elastically connected to the inner wall of the slide groove via a third spring;

[0020] Furthermore, the adjusting screw is provided with a positioning sliding hole in the middle, and a positioning sliding column is slidably connected in the positioning sliding hole, and the positioning sliding column is fixedly installed on the abutment plate.

[0021] Furthermore, a guide roller is rotatably mounted on the upper inner side of the clamping head, and the outer periphery of the guide roller can be rolledly connected to one side of the strip steel.

[0022] Furthermore, a guide platform is provided on one side of the guide roller. The guide platform is installed on the side of the clamping head away from the liner assembly. A guide ramp is provided on the inner side of the guide platform. The guide ramp is used to guide the end of the strip steel.

[0023] Furthermore, the conveying unit includes an upper pressure roller and a lower pressure roller. The two ends of the upper pressure roller and the lower pressure roller are rotatably connected to the frame. The upper surface of the strip is rolled to the periphery of the upper pressure roller, and the lower surface of the strip is rolled to the periphery of the lower pressure roller. One end of the lower pressure roller is fixedly connected to the output end of the conveying motor, and the conveying motor is fixedly installed on the frame.

[0024] Furthermore, the two ends of the upper pressure roller are respectively rotatably connected to the middle of a tension slider, the periphery of each tension slider is slidably connected to a bearing seat, and each bearing seat is mounted on the frame. The cross-section of the bearing seat is an inverted U-shaped structure, and the upper end of the tension slider is elastically connected to the top inner wall of the inverted U-shaped structure through a fourth spring.

[0025] Furthermore, a strip detection switch is installed on the stand, and the strip detection switch is located on one side of the clamping unit, with the actuating end of the strip detection switch facing the side of the strip.

[0026] Compared with the prior art, the automatic welding system for galvanized steel strip joints described in this invention has the following advantages:

[0027] The upstream and downstream strips to be welded are connected in series to the upstream and downstream docking components, respectively. The upstream docking component centers and aligns the upstream strip, and the downstream docking component centers and aligns the downstream strip. At this time, the liner assembly is in the raised state. The upstream docking component moves the welding end of the upstream strip to one side of the liner assembly, positioning the origin of the welding end of the upstream strip. The downstream docking component moves the welding end of the downstream strip to the other side of the liner assembly, positioning the origin of the welding end of the downstream strip. After the two origins are aligned, the two are welded by the welding components. This ensures welding quality and enables automatic centering and alignment, reducing the labor intensity of workers. Attached Figure Description

[0028] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0029] Figure 1 This is a schematic diagram of the automatic welding system for galvanized steel strip joints according to an embodiment of the present invention;

[0030] Figure 2 This is a side view schematic diagram of the automatic welding system for galvanized steel strip joints according to an embodiment of the present invention;

[0031] Figure 3 This is a top view schematic diagram of the automatic welding system for galvanized steel strip joints according to an embodiment of the present invention;

[0032] Figure 4This is a schematic diagram of the liner assembly described in an embodiment of the present invention;

[0033] Figure 5 This is a side view of the liner assembly according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the alignment plate with alignment posts and abutment blocks as described in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the liner body according to an embodiment of the present invention;

[0036] Figure 8 This is a cross-sectional schematic diagram of the liner assembly according to an embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the welding assembly described in an embodiment of the present invention;

[0038] Figure 10 This is a schematic diagram of the structure of the grinding assembly and welding head on the second slide table according to an embodiment of the present invention;

[0039] Figure 11 This is a schematic diagram of the structure of the polishing assembly described in an embodiment of the present invention;

[0040] Figure 12 This is a schematic diagram of the structure of the third slide and the grinding motor as described in an embodiment of the present invention;

[0041] Figure 13 This is a bottom view of the polishing assembly described in an embodiment of the present invention;

[0042] Figure 14 This is a schematic diagram of the upstream docking component described in an embodiment of the present invention;

[0043] Figure 15 This is a schematic diagram of the centering unit according to an embodiment of the present invention;

[0044] Figure 16 This is a schematic diagram of the structure of the adjusting head and the clamping head as described in an embodiment of the present invention;

[0045] Figure 17 This is a schematic diagram of the alignment sliding column according to an embodiment of the present invention;

[0046] Figure 18 This is a schematic diagram of the clamping unit described in an embodiment of the present invention;

[0047] Figure 19 This is a schematic diagram of the conveying unit according to an embodiment of the present invention;

[0048] Figure 20This is a schematic diagram of the structure of the upper pressure roller and tension slider according to an embodiment of the present invention;

[0049] Figure 21 This is a schematic diagram of the easing unit described in an embodiment of the present invention.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1-Welding assembly; 11-Second linear module; 12-Second slide table; 13-Third linear module; 14-Welding head; 15-Grinding assembly; 151-Fourth linear module; 152-First guide rail; 153-First support plate; 154-Second slide; 155-Grinding head; 156-Third slide table; 157-Grinding motor; 158-Abutting spring; 159-Second guide rail; 2-Upstream docking assembly; 21-Centering unit; 211-Clamping head; 212-Fixed plate; 213-Abutting plate; 214-Adjusting screw; 215-Third spring; 216-Alignment slide column; 217-Guide roller; 218-Guide table; 22-Clamping unit; 221-Upper pad; 222-Lower pad; 223-Fifth Linear module; 224-Second support plate; 23-Conveying unit; 231-Upper pressure roller; 232-Lower pressure roller; 233-Tension slider; 234-Shaft seat; 235-Fourth spring; 24-Easing unit; 241-Third support plate; 242-Fourth support plate; 243-Third guide rail; 244-First lead screw; 245-First support platform; 246-Second support platform; 25-Frame; 26-Strip detection switch; 3-Downstream docking assembly; 4-Liner assembly; 41-First linear module; 42-Liner body; 43-First slide table; 44-First slide carriage; 45-Alignment plate; 46-Alignment column; 47-First spring; 48-Abutment column; 49-First touch switch; 410-Second spring; 5-Strip. Detailed Implementation

[0052] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0054] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] An automatic strip uncoiling device is installed upstream of the automatic welding system, and a strip storage device is installed downstream. The automatic strip uncoiling device is equipped with metering and uncoiling speed detection functions. The strip storage device is used to store galvanized steel sheets to be rolled and welded. An automatic welding system for galvanized strip joints is installed between the automatic strip uncoiling device and the strip storage device. This automatic welding system connects the strip storage device and the strip uncoiling device to connect galvanized strips from different coils, meeting the requirements of continuous production on the production line. The strip storage device and the automatic strip uncoiling device are existing technologies. Figures 1-21As shown, the automatic welding system for galvanized steel strip joints includes a welding assembly 1, an upstream docking assembly 2, a downstream docking assembly 3, and a backing plate assembly 4. The backing plate assembly 4 is positioned below the welding assembly 1. The upstream docking assembly 2 and the downstream docking assembly 3 are respectively positioned on both sides of the backing plate assembly 4, facing each other. The upstream docking assembly 2 clamps the upstream steel strip joint 5, and the downstream docking assembly 3 clamps the downstream steel strip joint 5. The welding assembly 1 welds the upstream and downstream steel strip joints 5, and the backing plate assembly 4 serves as a backing for the welding. The upstream and downstream docking assemblies 2 and 3 can move relative to each other, and the actuating end of the backing plate assembly 4 can rise and fall. When the actuating end rises to its limit position, it positions the upstream and downstream steel strip joints 5; when the actuating end falls to its limit position, it backs the upstream and downstream steel strip joints 5. For the welding of the 5 joints, the ends of the upstream and downstream strip steel 5 to be welded need to be cut flat using laser cutting or cold sawing. The upstream and downstream strip steel 5 to be welded are then connected in series to the upstream docking assembly 2 and the downstream docking assembly 3, respectively. The upstream docking assembly 2 will center and align the upstream strip steel 5, and the downstream docking assembly 3 will center and align the downstream strip steel 5. At this time, the liner assembly 4 is in the raised state. The upstream docking assembly 2 moves the welding end of the upstream strip steel 5 to one side of the liner assembly 4 to locate the origin of the welding end of the upstream strip steel 5. The downstream docking assembly 3 moves the welding end of the downstream strip steel 5 to the other side of the liner assembly 4 to locate the origin of the welding end of the downstream strip steel 5. After the two origins are aligned, the welding assembly 1 is used to weld the two ends. This process ensures welding quality and enables automatic centering and alignment, reducing the labor intensity of the workers.

[0057] The liner assembly 4 includes a first linear module 41, a liner body 42, a first slide 43, and a first carriage 44. The first slide 43 is installed at both ends of the liner body 42. The periphery of each first slide 43 is slidably connected to one side of a first carriage 44. The first slide 43 and the first carriage 44 cooperate to limit the sliding trajectory of the liner body 42. In this embodiment, the liner body 42 is made of copper alloy material of the prior art. The two first carriages 44 are arranged opposite each other. Each first carriage 44 is fixedly installed on the foundation. The foundation described in this embodiment is a steel plate base. The steel plate base can be placed on a cement foundation or on a steel frame. It can be configured according to the actual site conditions. The lower end of the liner body 42 is fixedly installed on the movable end of the first linear module 41. The first linear module 41 is a push rod cylinder or push rod hydraulic cylinder of the prior art. The first linear module 41 is fixedly installed on the foundation. The upper end of the liner body 42 is used to pad the welding of the upstream strip steel 5 joint and the downstream strip steel 5 joint.

[0058] A aligning plate 45 is provided on each of the two sides of the liner body 42. The two aligning plates 45 correspond to the upstream docking component 2 and the downstream docking component 3, respectively. Multiple aligning posts 46 are provided on the side of each aligning plate 45 away from the upstream docking component 2 or the downstream docking component 3. Multiple aligning holes are provided on each side of the liner body 42. Each aligning hole corresponds to one aligning post 46. The outer periphery of the aligning post 46 is slidably connected to an aligning hole, and the aligning hole is a blind hole. One end of the aligning post 46 is connected by a first spring 47. The alignment plate 45 is elastically connected to the bottom of the alignment hole. The first spring 47 is used to elastically reset the relative position of the alignment plate 45, and the cooperation between the alignment post 46 and the alignment hole is used to limit the sliding trajectory of the alignment plate 45. The alignment plate 45 is also provided with an abutment post 48, which abuts against the same side of the alignment post 46. The abutment post 48 and the alignment post 46 are arranged parallel to each other. The liner body 42 is provided with a corresponding mounting hole, and a first touch switch 49 is installed in the mounting hole. One end of the abutment post 48 can abut against the first touch switch 49. At the actuator end, the first actuating switch 49 is a prior art micro switch. When the upstream or downstream strip 5 moves towards the alignment plate 45, the end of the strip 5 abuts against the alignment plate 45, causing the alignment plate 45 to move. When the alignment plate 45 drives the abutment post 48 to slide within the mounting hole, one end of the abutment post 48 gradually approaches the actuator end of the first micro switch. When the end of the abutment post 48 abuts against the actuator end of the first micro switch, it indicates that the upstream or downstream strip 5 has moved into position, and the alignment plate 45 and... The first micro switch is positioned at the origin of the welding end of the strip steel 5, and the mounting hole is a blind hole during installation. One end of the first touch switch 49 is elastically connected to the bottom of the mounting hole through the second spring 410. The other end of the first touch switch 49 is the actuating end. The second spring 410 is used for the elastic reset of the first touch switch 49 to prevent the abutment post 48 from making hard contact with the first touch switch 49 and causing damage to the parts. In this embodiment, the end of the abutment post 48 that contacts the first touch switch 49 is a frustum structure.

[0059] Welding assembly 1 includes a second linear module 11, a second slide 12, a third linear module 13, and a welding head 14. The welding head 14 is fixedly installed on the movable end of the third linear module 13. The third linear module 13 is a prior art push rod cylinder. The third linear module 13 is fixedly installed on the second slide 12. The second slide 12 is fixedly installed on the movable end of the second linear module 11. The second linear module 11 is a prior art lead screw linear sliding module. The second linear module 11 is fixedly installed on the foundation. The third linear module 13 is used to drive the welding head 14 to approach or move away from the object to be welded. The second linear module 11 is used to drive the second slide 12 and the welding head 14 to slide laterally. When the welding head 14 approaches the upstream and downstream strip steel 5 joint positions, the welding head 14 welds the joint. The straight seam welding is automatically completed by the lateral sliding of the second linear module 11. The height of the welding head 14 and the sliding distance of the second linear module 11 are preset values, which can be installed and adjusted by the staff according to the site conditions.

[0060] A grinding assembly 15 is installed on the second slide table 12. The grinding assembly 15 and the welding head 14 are arranged parallel to each other. The grinding assembly 15 is a pre-welding finishing structure for the end of the strip steel 5 to be welded. The grinding assembly 15 includes a fourth linear module 151, a first guide rail 152, a first support plate 153, a second slide 154, and a grinding head 155. The fourth linear module 151 is fixedly installed on the second slide table 12. The fourth linear module 151 is a push rod cylinder of the prior art. The first support plate 153 is installed on the movable end of the fourth linear module 151. One side of the first support plate 153 is slidably connected to the first guide rail 152. The first guide rail 152 is fixedly installed on the second slide table 12. The cooperation between the first support plate 153 and the first guide rail 152 is used to limit the sliding rail of the first support plate 153. The first support plate 153 has a second slide 154 mounted on one end via a first support rod. The upstream docking assembly 2 and the downstream docking assembly 3 are respectively provided with a grinding head 155. Each grinding head 155 is slidably connected to the second slide 154 via a third slide 156, and the two third slides 156 are arranged opposite each other. Each third slide 156 is provided with a grinding motor 157. The grinding head 155 is mounted on the output end of the grinding motor 157. The grinding motor 157 is a synchronous motor of the prior art. The grinding motor 157 is used to drive the grinding head 155 to rotate. The working end of the grinding head 155 is covered with diamond grit. The rotating grinding head 155 can grind the end of the strip steel 5 to be welded and remove oxides to improve the welding quality.

[0061] like Figures 9-13 As shown, the grinding head 155 is used to grind the surface to be welded on the upstream or downstream strip steel 5 joint. The lower end of the grinding head 155 is a frustum structure. When the fourth linear module 151 drives the grinding head 155 close to the end to be ground, the frustum structure facilitates the alignment of the grinding head 155. The frustum structure also forms a wedge structure between the grinding head 155 and the end to be ground, allowing the end to be ground to press against the grinding head 155, enabling the grinding head 155 to slide on the second slide 154. The third slide 156 is away from the upstream strip steel 5. A retaining spring 158 is provided on one side of the joint or downstream strip steel 5 joint. One end of the retaining spring 158 is elastically connected to the inner end wall of the second slide 154. The retaining spring 158 is used to provide a return elastic force for the grinding head 155 so that the working position of the grinding head 155 is always in contact with the end to be ground. A second guide rail 159 is provided on the second slide 154, and a guide slide hole is provided on the third slide 156. The outer periphery of the second guide rail 159 is slidably connected to the guide slide hole to limit the sliding trajectory of the third slide 156.

[0062] like Figure 14As shown, the upstream docking assembly 2 and the downstream docking assembly 3 have the same structure. The upstream docking assembly 2 includes a centering unit 21, a clamping unit 22, a conveying unit 23, and a easing unit 24. The easing unit 24 is installed on the foundation. A platform 25 is installed on the moving end of the easing unit 24. The conveying unit 23, the centering unit 21, and the clamping unit 22 are arranged sequentially on the platform 25 along the traveling direction of the strip steel 5. The clamping unit 22 is located on one side of the liner assembly 4. The clamping unit 22 is used to clamp the end of the strip steel 5 to be welded. The easing unit 24 drives the end of the strip steel 5 to be welded to approach or move away from the liner assembly 4 through the platform 25 and the clamping unit 22. The two sides of the strip steel 5 to be welded abut against the inner side of the centering unit 21. The centering unit 21 is used to position the relative position of the strip steel 5 to be welded on the platform 25, and the conveying unit 23 is used to drive the strip steel 5 to move linearly on the platform 25.

[0063] like Figures 15-17 As shown, the clamping unit 22 includes an upper pad 221 and a lower pad 222. The lower pad 222 is mounted on the frame 25 and located on one side of the liner assembly 4. The upper pad 221 and the lower pad 222 are arranged parallel to each other. The upper pad 221 is fixedly mounted to the movable end of the fifth linear module 223. The fifth linear module 223 is a push rod cylinder of the prior art. The fifth linear module 223 is fixedly mounted on the second support plate 224. The second support plate 224 is mounted on the frame 25 through the second support rod. The upper pad 221 is provided with a plurality of first sliding holes. The periphery of each second support rod is slidably connected to a first slider. The fifth linear module 223 is used to drive the upper pad 221 to move relative to the lower pad 222 so as to clamp and position the relative position of the upstream or downstream strip steel 5.

[0064] The easing unit 24 includes a third support plate 241, a fourth support plate 242, a third guide rail 243, a first lead screw 244, a first support platform 245, and a second support platform 246. The third support plate 241 and the fourth support plate 242 are arranged parallel to each other and are respectively installed on the foundation. The outer periphery of the first lead screw 244 is rotatably connected to the third support plate 241 and the fourth support plate 242. A third guide rail 243 is provided on each side of the first lead screw 244, and the outer periphery of each third guide rail 243 is fixedly installed on the third support plate 241 and the fourth support plate 242. The lower end of the frame 25 is fixedly installed with the first support platform 245 and the second support platform 246. The 6 components are arranged in parallel. The first support plate 245 and the second support plate 246 are respectively provided with multiple support sliding holes. The support sliding holes are used to slide to the periphery of the third guide rail 243 or to avoid the first lead screw 244. The lead screw nut is installed on the first support plate 245 or the second support plate 246. The periphery of the first lead screw 244 is threaded to the periphery of the lead screw nut. One end of the first lead screw 244 is fixedly connected to the output end of the servo motor. The servo motor is fixedly installed on the foundation. The servo motor is existing technology. The rotation of the servo motor can drive the first lead screw 244 to rotate, thereby realizing the movement of the first support plate 245, the second support plate 246 and the frame 25 along the direction of the strip 5, so as to realize the docking of the upstream end of the strip 5 and the downstream end of the strip 5.

[0065] The centering unit 21 includes two clamping heads 211, which are arranged opposite to each other. A sliding groove is provided on the frame 25. The middle part of each clamping head 211 is slidably connected to the sliding groove. The upper inner side of the clamping head 211 can abut against one side of the strip 5, and the lower inner side of the clamping head 211 can abut against one end of an adjusting head. The adjusting head is installed on the lower side of the frame 25, and the two adjusting heads are arranged opposite to each other. The adjusting head is an adjustment structure for the initial relative position of the clamping heads 211, such as... Figure 16As shown, the adjusting head includes a fixed plate 212, an abutment plate 213, and an adjusting screw 214. The fixed plate 212 is fixedly installed on the lower side of the frame 25. The outer thread of the adjusting screw 214 is connected to the fixed plate 212, and one end of the adjusting screw 214 is rotatably connected to the abutment plate 213. By turning the adjusting screw 214, the operator can adjust the relative position of the abutment plate. One side of the clamping head 211 can be grounded onto the abutment plate 213, and the other side of the clamping head 211 is connected to a third... Spring 215 is elastically connected to the inner wall of the slide. Under the combined action of the third spring 215 and the abutment plate 213, the initial relative position of the clamping head 211 can be defined. The two opposing clamping heads 211 can define the relative position of the two sides of the strip 5. If the strip 5 is not centered in the initial state, the clamping head 211 can also slide in the slide and compress the third spring 215. The third spring 215 always provides the clamping head 211 with the reset elasticity. During the linear movement of the strip 5, the strip 5 can be gradually centered.

[0066] like Figure 17 As shown, the adjusting screw 214 has a positioning sliding hole in the middle, and a positioning sliding column 216 is slidably connected in the positioning sliding hole. The positioning sliding column 216 is fixedly installed on the abutment plate 213. The cooperation between the positioning sliding hole and the positioning sliding column 216 can limit the sliding trajectory of the clamping head 211 and support the relative position of the clamping head 211 to prevent the clamping head 211 from bending under force, which would cause the limiting to fail. In addition, a guide roller 217 is rotatably installed on the upper inner side of the clamping head 211. The outer periphery of the guide roller 217 can be rolled to one side of the strip steel 5 to reduce the linear displacement of the strip steel 5. To reduce friction between the clamping head 211 and prevent damage to the parts, a guide platform 218 is provided on one side of the guide roller 217. The guide platform 218 is installed on the side of the clamping head 211 away from the liner assembly 4. A guide ramp is provided on the inner side of the guide platform 218. The guide ramp is used to guide the end of the strip steel 5. The guide platform 218 is a guide structure for the strip end to move to the clamping head 211. When the strip steel 5 moves between the two clamping heads 211, the two clamping heads 211 can move adaptively to both sides through the guidance of the guide platform 218, preventing the sides of the strip steel 5 from bending the clamping head 211.

[0067] The conveying unit 23 is a cooperating structure with the centering unit 21, including an upper pressure roller 231 and a lower pressure roller 232. Both ends of the upper pressure roller 231 and the lower pressure roller 232 are rotatably connected to the frame 25. The upper surface of the strip 5 is rolled to the periphery of the upper pressure roller 231, and the lower surface of the strip 5 is rolled to the periphery of the lower pressure roller 232. One end of the lower pressure roller 232 is fixedly connected to the output end of the conveying motor, which is fixedly mounted on the frame 25. Both ends of the upper pressure roller 231 are rotatably connected to the middle of a tension slider 233. The periphery of each tension slider 233 is slidably connected to a bearing seat 234, and each bearing seat 234 is mounted on the frame 25. The cross-section of the bearing seat 234 is an inverted U-shape. The upper end of the tension slider 233... The strip 5 is elastically connected to the top inner wall of the inverted U-shaped structure by a fourth spring 235. The conveying motor is a conventional power motor. The upper and lower surfaces of the strip 5 are respectively rolled to the periphery of the upper pressure roller 231 and the lower pressure roller 232. The fourth spring 235 enables the upper pressure roller 231 to always press against the surface of the strip 5 so as to achieve linear conveying of the strip 5. The linear movement of the strip 5 is driven by the conveying unit 23. The side of the strip 5 is gradually centered by the squeezing of the centering unit 21. The strip 5 detection switch 26 is installed on the stand 25 and is located on one side of the clamping unit 22. The actuating end of the strip 5 detection switch 26 faces one side of the strip 5. The strip 5 detection switch 26 is a conventional photoelectric sensor.

[0068] The process of aligning upstream and downstream strip steel:

[0069] The tooling operator adjusts the relative position of the adjusting screw 214 so that the initial positions of the two clamping heads 211 are in the preset value state. The end of the upstream strip 5 is inserted between the upper pressure roller 231 and the lower pressure roller 232. The conveyor motor rotates in the forward direction, and the end of the strip 5 gradually abuts against the guide table 218 or the guide roller 217. When the end of the strip 5 abuts against the guide table 218, affected by the slope of the guide table 218, the corresponding clamping head 211 moves outward. At this time, the third spring 215 is not centered, and the upstream strip 5 is not centered. The conveyor motor continues to rotate in the forward direction. When the strip 5 detection switch... After detecting the end of strip 5, the conveyor motor stops rotating in the forward direction and switches to directional rotation. After rotating in the directional direction for a set number of times, the conveyor motor rotates in the forward direction again. This process is repeated. The side of strip 5 is elastically squeezed by the third spring 215, and it gradually centers. The operator can visually observe that the guide rollers 217 of the two clamping heads 211 are rotating when strip 5 moves linearly. This indicates that strip 5 is in a centered state. The centering motion of the downstream strip 5 is the same as that of the upstream strip 5, but in the opposite direction. Therefore, the working process of centering the downstream strip 5 will not be described in detail here.

[0070] The process of locating the origin point of the upstream and downstream strip steel welding ends:

[0071] After the upstream strip steel 5 is centered, the conveyor motor drives the strip steel 5 to move linearly, causing the end of the strip steel 5 to gradually abut against the alignment plate 45. When the alignment plate 45 drives the abutment post 48 to abut against the first touch switch 49, the strip steel 5 moves into position, the clamping unit 22 clamps the strip steel 5, the conveyor motor stops rotating, the easing unit 24 drives the platform 25 and the clamping unit 22 to retract a set distance, the end of the strip steel 5 is no longer in contact with the alignment plate 45, the alignment plate 45 resets, and the downstream... The positioning method of the origin point of the strip steel 5 end is the same as that of the upstream, but in the opposite direction. Therefore, the working process of positioning the origin point of the downstream strip steel 5 end will not be described here. After the origin point positioning of the welding ends of the upstream and downstream strip steel 5 is completed, the first linear module 41 drives the liner body 42 to descend, and the easing unit 24 drives the platform 25 and the clamping unit 22 to extend a set distance. At this time, the ends of the upstream and downstream strip steel 5 do not contact each other, but can cover the liner body 42.

[0072] After the upstream and downstream strip steel ends 5 are positioned at their origins, the fourth linear module 151 extends out, and the two grinding heads 155 respectively abut against the upstream and downstream strip steel ends 5. The area to be welded can be ground by the grinding motor 157. After the grinding is completed, welding can be performed by the welding head 14.

[0073] The control method in this embodiment is controlled by a controller. The controller circuit can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this document is mainly used to protect mechanical devices, and the control method and circuit connection will not be explained in detail here.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic welding system for galvanized steel strip joints, comprising a welding assembly (1), an upstream butt joint assembly (2), a downstream butt joint assembly (3), and a backing plate assembly (4), wherein the backing plate assembly (4) is disposed below the welding assembly (1), and the upstream butt joint assembly (2) and the downstream butt joint assembly (3) are disposed on both sides of the backing plate assembly (4), the upstream butt joint assembly (2) and the downstream butt joint assembly (3) are arranged opposite to each other, the upstream butt joint assembly (2) is used to clamp the upstream steel strip (5) joint, the downstream butt joint assembly (3) is used to clamp the downstream steel strip (5) joint, the welding assembly (1) is used to weld the upstream steel strip (5) joint and the downstream steel strip (5) joint, and the backing plate assembly (4) is used to back the welding, characterized in that: The upstream docking assembly (2) and the downstream docking assembly (3) can move relative to each other, and the actuating end of the liner assembly (4) can rise and fall. The actuating end rises to the limit position to position the upstream strip steel (5) joint and the downstream strip steel (5) joint, and the actuating end falls to the limit position to padded the welding of the upstream strip steel (5) joint and the downstream strip steel (5) joint. The liner assembly (4) includes a liner body (42), the upper end of which is used to padded the welding of the upstream strip (5) joint and the downstream strip (5) joint; A aligning plate (45) is provided on each side of the liner body (42). The two aligning plates (45) correspond to the upstream docking component (2) and the downstream docking component (3) respectively. Multiple aligning posts (46) are provided on the side of each aligning plate (45) away from the upstream docking component (2) or the downstream docking component (3). Multiple aligning holes are provided on each side of the liner body (42). Each aligning hole corresponds to an aligning post (46). The aligning post (46) is slidably connected to an aligning hole, and the aligning hole is a blind hole. One end of the aligning post (46) is elastically connected to the bottom of the aligning hole through a first spring (47). The alignment plate (45) is also provided with an abutting post (48), which abuts against the same side of the alignment post (46). The abutting post (48) and the alignment post (46) are arranged parallel to each other. The liner body (42) is provided with a corresponding mounting hole. The first touch switch (49) is installed in the mounting hole. One end of the abutting post (48) can abut against the execution end of the first touch switch (49). The mounting hole is a blind hole. One end of the first touch switch (49) is elastically connected to the bottom of the mounting hole through the second spring (410), and the other end of the first touch switch (49) is the actuation end.

2. The automatic welding system for galvanized steel strip joints according to claim 1, characterized in that: The liner assembly (4) also includes a first linear module (41), a first slide (43) and a first carriage (44). The first slide (43) is installed at both ends of the liner body (42). The periphery of each first slide (43) is slidably connected to one side of a first carriage (44). The two first carriages (44) are arranged opposite to each other. Each first carriage (44) is fixedly installed on the foundation. The lower end of the liner body (42) is fixedly installed to the movable end of the first linear module (41). The first linear module (41) is fixedly installed on the foundation.

3. The automatic welding system for galvanized steel strip joints according to claim 1, characterized in that: The end of the abutment post (48) that contacts the first trigger switch (49) is a frustum structure.

4. The automatic welding system for galvanized steel strip joints according to claim 1, characterized in that: The welding assembly (1) includes a second linear module (11), a second slide (12), a third linear module (13), and a welding head (14). The welding head (14) is fixedly installed on the movable end of the third linear module (13). The third linear module (13) is fixedly installed on the second slide (12). The second slide (12) is fixedly installed on the movable end of the second linear module (11). The second linear module (11) is fixedly installed on the foundation. The third linear module (13) is used to drive the welding head (14) to move closer to or away from the object to be welded. The second linear module (11) is used to drive the second slide (12) and the welding head (14) to slide laterally.

5. The automatic welding system for galvanized steel strip joints according to claim 4, characterized in that: A grinding assembly (15) is provided on the second slide (12). The grinding assembly (15) and the welding head (14) are arranged parallel to each other. The grinding assembly (15) includes a fourth linear module (151), a first guide rail (152), a first support plate (153), a second slide (154), and a grinding head (155). The fourth linear module (151) is fixedly installed on the second slide (12). The first support plate (153) is installed on the movable end of the fourth linear module (151). One side of the first support plate (153) is slidably connected to the first guide rail (152). The first support plate (153) is fixedly installed on the second slide (12). The second slide (154) is installed at one end of the first support rod. The upstream docking component (2) and the downstream docking component (3) are respectively provided with a grinding head (155). Each grinding head (155) is slidably connected to the second slide (154) through a third slide (156). The two third slides (156) are arranged opposite each other. Each third slide (156) is provided with a grinding motor (157). The grinding head (155) is installed at the output end of the grinding motor (157). The grinding head (155) is used to grind the surface to be welded of the upstream strip steel (5) joint or the downstream strip steel (5) joint. The lower end of the grinding head (155) is a frustum structure. The third slide (156) is provided with a stop spring (158) on the side away from the upstream strip steel (5) joint or the downstream strip steel (5) joint. One end of the stop spring (158) is elastically connected to the inner end wall of the second slide (154). The second slide (154) is provided with a second guide rail (159). The third slide (156) is provided with a guide sliding hole. The outer periphery of the second guide rail (159) is slidably connected to the guide sliding hole.

6. The automatic welding system for galvanized steel strip joints according to claim 1, characterized in that: The upstream docking assembly (2) and the downstream docking assembly (3) have the same structure. The upstream docking assembly (2) includes an alignment unit (21), a clamping unit (22), a conveying unit (23), and a easing unit (24). The easing unit (24) is installed on the foundation. A platform (25) is installed on the moving end of the easing unit (24). The conveying unit (23), the alignment unit (21), and the clamping unit (22) are arranged sequentially on the platform (25) along the traveling direction of the strip (5). The clamping unit (22) is located on the liner assembly ( On one side of 4), the clamping unit (22) is used to clamp the end of the strip (5) to be welded. The easing unit (24) drives the end of the strip (5) to be welded to approach or move away from the liner assembly (4) through the platform (25) and the clamping unit (22). The two sides of the strip (5) to be welded abut against the inner side of the centering unit (21). The centering unit (21) is used to position the relative position of the strip (5) to be welded on the platform (25), and the conveying unit (23) is used to drive the strip (5) to move linearly on the platform (25).

7. The automatic welding system for galvanized steel strip joints according to claim 6, characterized in that: The clamping unit (22) includes an upper pad (221) and a lower pad (222). The lower pad (222) is mounted on the frame (25) and located on one side of the liner assembly (4). The upper pad (221) and the lower pad (222) are arranged parallel to each other. The upper pad (221) is fixedly mounted to the movable end of the fifth linear module (223). The fifth linear module (223) is fixedly mounted on the second support plate (224). The second support plate (224) is mounted on the frame (25) through the second support rod. The upper pad (221) is provided with a plurality of first sliding holes. The periphery of each second support rod is slidably connected to a first slider.

8. The automatic welding system for galvanized steel strip joints according to claim 6, characterized in that: The easing unit (24) includes a third support plate (241), a fourth support plate (242), a third guide rail (243), a first lead screw (244), a first support plate (245), and a second support plate (246). The third support plate (241) and the fourth support plate (242) are arranged parallel to each other and are respectively installed on the foundation. The outer periphery of the first lead screw (244) is rotatably connected to the third support plate (241) and the fourth support plate (242). A third guide rail (243) is provided on each side of the first lead screw (244), and the outer periphery of each third guide rail (243) is fixedly installed on the third support plate (241) and the fourth support plate (246). 2) On the upper part, the lower end of the frame (25) is fixedly installed with the first support plate (245) and the second support plate (246). The first support plate (245) and the second support plate (246) are arranged parallel to each other. The first support plate (245) and the second support plate (246) are respectively provided with multiple support sliding holes. The support sliding holes are used to slide to the periphery of the third guide rail (243) or to avoid the first lead screw (244). The lead screw nut is installed on the first support plate (245) or the second support plate (246). The periphery of the first lead screw (244) is threaded to the periphery of the lead screw nut. One end of the first lead screw (244) is fixedly connected to the output end of the servo motor. The servo motor is fixedly installed on the foundation.

9. The automatic welding system for galvanized steel strip joints according to claim 6, characterized in that: The centering unit (21) includes two clamping heads (211), which are arranged opposite to each other. The frame (25) is provided with a sliding groove. The middle part of each clamping head (211) is slidably connected to the sliding groove. The upper inner side of the clamping head (211) can abut against one side of the strip (5), and the lower inner side of the clamping head (211) can abut against one end of an adjusting head. The adjusting head is installed on the lower side of the frame (25), and the two adjusting heads are arranged opposite to each other. The adjusting head includes a fixed plate (212), an abutment plate (213), and an adjusting screw (214). The fixed plate (212) is fixedly installed on the lower side of the frame (25). The outer thread of the adjusting screw (214) is connected to the fixed plate (212), and one end of the adjusting screw (214) is rotatably connected to the abutment plate (213). One side of the clamping head (211) can be grounded onto the abutting plate (213), and the other side of the clamping head (211) is elastically connected to the inner wall of the groove through a third spring (215); The adjusting screw (214) has a positioning sliding hole in the middle, and a positioning sliding column (216) is slidably connected in the positioning sliding hole. The positioning sliding column (216) is fixedly installed on the abutment plate (213). A guide roller (217) is rotatably mounted on the upper inner side of the clamping head (211), and the outer periphery of the guide roller (217) can be rolled to one side of the strip (5); A guide platform (218) is provided on one side of the guide roller (217). The guide platform (218) is installed on the side of the clamp head (211) away from the liner assembly (4). A guide ramp is provided on the inner side of the guide platform (218). The guide ramp is used to guide the end of the strip (5).

10. The automatic welding system for galvanized steel strip joints according to claim 6, characterized in that: The conveying unit (23) includes an upper pressure roller (231) and a lower pressure roller (232). The two ends of the upper pressure roller (231) and the lower pressure roller (232) are rotatably connected to the frame (25). The upper surface of the strip (5) is rolled to the periphery of the upper pressure roller (231), and the lower surface of the strip (5) is rolled to the periphery of the lower pressure roller (232). One end of the lower pressure roller (232) is fixedly connected to the output end of the conveying motor. The conveying motor is fixedly installed on the frame (25). The two ends of the upper pressure roller (231) are respectively rotatably connected to the middle of a tension slider (233). The periphery of each tension slider (233) is slidably connected to a bearing seat (234), and each bearing seat (234) is mounted on the frame (25). The cross-section of the bearing seat (234) is an inverted U-shaped structure. The upper end of the tension slider (233) is elastically connected to the top inner wall of the inverted U-shaped structure through a fourth spring (235). A strip (5) detection switch (26) is installed on the stand (25), and the strip (5) detection switch (26) is located on one side of the clamping unit (22), with the actuating end of the strip (5) detection switch (26) facing the side of the strip (5).

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