Automatic welding system for galvanized strip steel joints

Abstract

The automatic welding system comprises a welding assembly, an upstream butt joint assembly, a downstream butt joint assembly and a lining plate assembly, the upstream butt joint assembly and the downstream butt joint assembly can move relatively, and the execution end of the lining plate assembly can ascend and descend. The executing end ascends to the limit position to be used for positioning the upstream strip steel connector and the downstream strip steel connector, and the executing end descends to the limit position to be used for welding the upstream strip steel connector and the downstream strip steel connector. According to the automatic welding system, the upstream butt joint assembly drives the welding end of the upstream strip steel to abut against one side of the lining plate assembly to position the original point of the welding end of the upstream strip steel, and the downstream butt joint assembly drives the welding end of the downstream strip steel to abut against the other side of the lining plate assembly to position the original point of the welding end of the downstream strip steel to position the original point of the welding end of the downstream strip steel. After the two original points are aligned, the two original points are welded through the welding assembly, the welding quality can be guaranteed, automatic centering alignment can be conducted, and the labor intensity of workers is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of straight seam welded pipe production, in particular to an automatic welding system for galvanized steel strip joints. BACKGROUND

[0002] Straight seam welded pipe is a kind of steel pipe which is formed by winding a long strip steel into a round pipe and welding a straight seam. Due to the high hardness and smooth surface of the straight seam welded pipe, it has been widely used in some industries which were previously dominated by seamless steel pipes, such as automobile transmission pipes, boiler pressure pipes, oil casing pipes, oil and gas transmission pipes, etc. In the prior art, the winding length of the long strip steel varies, and the winding length of the thicker steel strip is smaller. Since the straight seam welded pipe is produced continuously, the upstream steel strip needs to be welded to the downstream steel strip after each winding to achieve continuous production without stopping. The current production method is to cut the upstream and downstream steel strips respectively, then fix them on the tooling, and then manually weld them. Since both the upstream and downstream steel strips are wound on the spool at this time, the tension and weight of the unwinding are large, and it is difficult for the workers to move them. Moreover, it is not convenient to align the two joints when they are placed on the tooling, and the labor intensity is high and the splicing efficiency is low. SUMMARY

[0003] Therefore, the present application aims to provide an automatic welding system for galvanized steel strip joints to solve the problems of manual alignment and high labor intensity in the splicing of steel strip raw materials during the production of the steel strip coiling in the prior art.

[0004] To achieve the above-mentioned purposes, the technical scheme of the present application is as follows: An automatic welding system for galvanized steel strip joints, comprising a welding assembly, an upstream butt joint assembly, a downstream butt joint assembly and a backing plate assembly, the backing plate assembly is arranged below the welding assembly, the upstream butt joint assembly and the downstream butt joint assembly are arranged on the two sides of the backing plate assembly respectively, the upstream butt joint assembly and the downstream butt joint assembly are arranged opposite to each other, the upstream butt joint assembly is used for clamping the upstream steel strip joint, the downstream butt joint assembly is used for clamping the downstream steel strip joint, the welding assembly is used for welding the upstream steel strip joint and the downstream steel strip joint, and the backing plate assembly is used for backing the welding, the upstream butt joint assembly and the downstream butt joint assembly can move relatively, and the execution end of the backing plate assembly can be lifted and lowered, the execution end is lifted to the limit position to position the upstream steel strip joint and the downstream steel strip joint, and the execution end is lowered to the limit position to back the welding of the upstream steel strip joint and the downstream steel strip joint.

[0005] Further, the lining plate assembly comprises a first linear module, a lining plate body, a first sliding table and a first sliding frame, two ends of the lining plate body are respectively provided with the first sliding table, the periphery of each first sliding table is slidably connected to one side of a first sliding frame, the two first sliding frames are oppositely arranged, each first sliding frame is fixedly installed on the base, the lower end of the lining plate body is fixedly installed on the movable end of the first linear module, the first linear module is fixedly installed on the base, and the upper end of the lining plate body is used for lining the welding of the upstream strip joint and the downstream strip joint; Further, one alignment plate is arranged on each side of the lining plate body, the two alignment plates correspond to the upstream butt joint assembly and the downstream butt joint assembly respectively, a plurality of alignment columns are arranged on the side of each alignment plate away from the upstream butt joint assembly or the downstream butt joint assembly, a plurality of alignment holes are arranged on each side of the lining plate body, each alignment hole corresponds to one alignment column, the periphery of the alignment column is slidably connected into one alignment hole, and the alignment hole is a blind hole, one end of the alignment column is elastically connected to the bottom of the alignment hole through a first spring; Further, the alignment plate is further provided with an abutting column, and the abutting column is located on the same side of the alignment column, the abutting column and the alignment column are arranged in parallel with each other, a mounting hole is correspondingly arranged on the lining plate body, a first touch switch is mounted in the mounting hole, and one end of the abutting column can abut against the execution end of the first touch switch; Further, 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 execution end; Further, the end of the abutting column in contact with the first touch switch is a circular truncated cone structure.

[0006] Further, the welding assembly comprises a second linear module, a second sliding table, a third linear module and a welding head, the welding head is fixedly installed on the movable end of the third linear module, the third linear module is fixedly installed on the second sliding table, the second sliding table is fixedly installed on the movable end of the second linear module, the second linear module is fixedly installed on the base, the third linear module is used for driving the welding head to approach or move away from the object to be welded, and the second linear module is used for driving the second sliding table and the welding head to slide transversely; Further, the second sliding table is provided with a polishing assembly, the polishing assembly and the welding head are arranged in parallel with each other, the polishing assembly comprises a fourth linear module, a first guide rail, a first supporting plate, a second sliding frame and a polishing head, the fourth linear module is fixedly installed on the second sliding table, the movable end of the fourth linear module is provided with the first supporting plate, one side of the first supporting plate is slidably connected to the first guide rail, the first guide rail is fixedly installed on the second sliding table, one end of the first supporting plate is provided with the second sliding frame through a first supporting rod, one polishing head is correspondingly arranged on the upstream butt joint assembly and the downstream butt joint assembly, each polishing head is slidably connected into the second sliding frame through a third sliding table, and the two third sliding tables are oppositely arranged, one polishing motor is arranged on each third sliding table, and the output end of the polishing motor is provided with the polishing head; Further, the grinding head is used for grinding the to-be-welded surface of the upstream strip steel joint or the downstream strip steel joint, the lower end of the grinding head is a circular table structure, the third sliding table is provided with an abutting spring away from one side of the upstream strip steel joint or the downstream strip steel joint, one end of the abutting spring is elastically connected to the inner side end wall of the second sliding frame, a second guide rail is arranged on the second sliding frame, a guide sliding hole is arranged on the third sliding table, and the second guide rail is slidingly connected to the inside of the guide sliding hole.

[0007] Further, the upstream butt joint assembly and the downstream butt joint assembly are the same structure, the upstream butt joint assembly comprises a centering unit, a clamping unit, a conveying unit and a buffer unit, the buffer unit is installed on the base, a rack is installed on the moving end of the buffer unit, the rack is sequentially provided with the conveying unit, the centering unit and the clamping unit along the running direction of the strip steel, the clamping unit is located on one side of the backing plate assembly, the clamping unit is used for clamping the to-be-welded end of the strip steel, the buffer unit drives the to-be-welded end of the strip steel to approach or move away from the backing plate assembly through the rack and the clamping unit, the two sides of the to-be-welded strip steel are respectively abutted to the inner sides of the centering unit, the centering unit is used for positioning the relative position of the to-be-welded strip steel on the rack, and the conveying unit is used for driving the linear movement of the strip steel on the rack.

[0008] Further, the clamping unit comprises an upper backing plate and a lower backing plate, the lower backing plate is installed on the rack and located on one side of the backing plate assembly, the upper backing plate and the lower backing plate are arranged in parallel with each other, the upper backing plate is fixedly installed on the movable end of the fifth linear module, the fifth linear module is fixedly installed on the second supporting plate, the second supporting plate is installed on the rack through the second supporting rod, and a plurality of first sliding holes are arranged on the upper backing plate, and the outer periphery of each second supporting rod is slidingly connected to one first sliding block.

[0009] Further, the buffer unit comprises a third supporting plate, a fourth supporting plate, a third guide rail, a first lead screw, a first supporting table plate and a second supporting table plate, the third supporting plate and the fourth supporting plate are arranged in parallel with each other, the third supporting plate and the fourth supporting plate are respectively installed on the base, the outer periphery of the first lead screw is respectively rotatably connected to the third supporting plate and the fourth supporting plate, one third guide rail is arranged on each side of the first lead screw, the outer periphery of each third guide rail is respectively fixedly installed on the third supporting plate and the fourth supporting plate, the lower end of the rack is fixedly installed with the first supporting table plate and the second supporting table plate, the first supporting table plate and the second supporting table plate are arranged in parallel with each other, a plurality of supporting sliding holes are respectively arranged on the first supporting table plate and the second supporting table plate, the supporting sliding holes are used for slidingly connecting to the outer periphery of the third guide rail or avoiding the first lead screw, a lead screw nut is installed on the first supporting table plate or the second supporting table plate, the outer periphery of the first lead screw is threadedly connected to the outer periphery of the lead screw nut, one end of the first lead screw is fixedly connected to the output end of a servo motor, and the servo motor is fixedly installed on the base.

[0010] Further, the centering unit comprises two clamping heads which are oppositely arranged, the workbench is provided with a sliding groove, the middle part of each clamping head is slidably connected to the sliding groove, the inner side of the upper part of the clamping head can abut to one side of the strip steel, the inner side of the lower part of the clamping head can abut to one end of an adjusting head, the adjusting head is installed on the lower side of the workbench, and the two adjusting heads are oppositely arranged. Further, the adjusting head comprises a fixed plate body, an abutting plate body and an adjusting screw, the fixed plate body is fixedly installed on the lower side of the workbench, the adjusting screw is threadedly connected to the fixed plate body, and one end of the adjusting screw is rotatably connected to the abutting plate body. Further, one side of the clamping head is connected to the abutting plate body, and the other side of the clamping head is elastically connected to the inner wall of the sliding groove through a third spring. Further, the middle part of the adjusting screw is provided with a positioning sliding hole, a positioning sliding column is slidably connected in the positioning sliding hole, and the positioning sliding column is fixedly installed on the abutting plate body. Further, the inner side of the upper part of the clamping head is rotatably installed with a guide roller, and the outer periphery of the guide roller can be rollingly connected to one side of the strip steel. Further, one side of the guide roller is provided with a guide table, the guide table is installed on the side of the clamping head away from the lining plate assembly, the inner side of the guide table is provided with a guide slope, and the guide slope is used for guiding the end of the strip steel.

[0011] Further, the conveying unit comprises an upper pressing roller and a lower pressing roller, the two ends of the upper pressing roller and the lower pressing roller are rotatably connected to the workbench, the upper surface of the strip steel is rollingly connected to the outer periphery of the upper pressing roller, the lower surface of the strip steel is rollingly connected to the outer periphery of the lower pressing roller, one end of the lower pressing roller is fixedly connected to the output end of a conveying motor, and the conveying motor is fixedly installed on the workbench. Further, the two ends of the upper pressing roller are rotatably connected to the middle part of a tension sliding block, the outer periphery of each tension sliding block is slidably connected to an axle seat, each axle seat is installed on the workbench, the cross section of the axle seat is a reverse U-shaped structure, and the upper end of the tension sliding block is elastically connected to the top inner wall of the reverse U-shaped structure through a fourth spring.

[0012] Further, the workbench is installed with a strip steel detection switch, the strip steel detection switch is located on one side of the clamping unit, and the execution end of the strip steel detection switch faces one side of the strip steel.

[0013] Compared with the prior art, the automatic welding system for the galvanized strip steel joint has the following beneficial effects: The upstream strip steel and the downstream strip steel to be welded are respectively connected to the upstream butt joint assembly and the downstream butt joint assembly, the upstream butt joint assembly can align the upstream strip steel in the middle, the downstream butt joint assembly can align the downstream strip steel in the middle, and at this time, the backing plate assembly is in the raised state, the upstream butt joint assembly drives the welding end of the upstream strip steel to abut to one side of the backing plate assembly, and the origin of the welding end of the upstream strip steel is positioned, the downstream butt joint assembly drives the welding end of the downstream strip steel to abut to the other side of the backing plate assembly, and the origin of the welding end of the downstream strip steel is positioned, after the two origins are aligned, the two are welded through the welding assembly, the welding quality can be guaranteed, and automatic alignment can be performed, and the labor intensity of workers is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and serve as an explanation of the illustrative embodiments of the present application, and do not constitute improper limitations to the present application. In the drawings: Figure 1 A structural schematic view of the automatic welding system of the galvanized strip steel joint according to the embodiment of the present application; Figure 2 A side view schematic view of the automatic welding system of the galvanized strip steel joint according to the embodiment of the present application; Figure 3 A top view schematic view of the automatic welding system of the galvanized strip steel joint according to the embodiment of the present application; Figure 4 A structural schematic view of the backing plate assembly according to the embodiment of the present application; Figure 5 A side view schematic view of the backing plate assembly according to the embodiment of the present application; Figure 6 A structural schematic view of the alignment column provided on the alignment plate and abutting structure according to the embodiment of the present application; Figure 7 A structural schematic view of the backing plate body according to the embodiment of the present application; Figure 8 A cross-sectional schematic view of the backing plate assembly according to the embodiment of the present application; Figure 9 A structural schematic view of the welding assembly according to the embodiment of the present application; Figure 10 A structural schematic view of the polishing assembly and welding head provided on the second sliding table according to the embodiment of the present application; Figure 11 A structural schematic view of the polishing assembly according to the embodiment of the present application; Figure 12 A structural schematic view of the third sliding table and polishing motor cooperation according to the embodiment of the present application; Figure 13 A bottom view schematic view of the polishing assembly according to the embodiment of the present application; Figure 14 Structure diagram of upstream docking assembly according to an embodiment of the application; Figure 15 Structure diagram of centering unit according to an embodiment of the application; Figure 16 Structure diagram of cooperation between adjusting head and clamping edge head according to an embodiment of the application; Figure 17 Structure diagram of alignment slide according to an embodiment of the application; Figure 18 Structure diagram of clamping unit according to an embodiment of the application; Figure 19 Structure diagram of conveying unit according to an embodiment of the application; Figure 20 Structure diagram of cooperation between upper press roller and tension slide according to an embodiment of the application; Figure 21 Structure diagram of slow-motion unit according to an embodiment of the application.

[0015] Explanation of reference numerals: 1-welding assembly; 11-second linear module; 12-second slide; 13-third linear module; 14-welding head; 15-polishing assembly; 151-fourth linear module; 152-first guide rail; 153-first support plate; 154-second slide carriage; 155-polishing head; 156-third slide; 157-polishing motor; 158-abutment spring; 159-second guide rail; 2-upstream docking assembly; 21-centering unit; 211-clamping edge head; 212-fixed plate body; 213-abutment plate body; 214-adjusting screw; 215-third spring; 216-alignment slide; 217-guide roller; 218-guide table; 22-clamping unit; 221-upper backing plate; 222-lower backing plate; 223-fifth linear module; 224-second support plate; 23-conveying unit; 231-upper press roller; 232-lower press roller; 233-tension slide; 234-axle seat; 235-fourth spring; 24-slow-motion unit; 241-third support plate; 242-fourth support plate; 243-third guide rail; 244-first lead screw; 245-first support table plate; 246-second support table plate; 25-rack; 26-strip steel detection switch; 3-downstream docking assembly; 4-backing plate assembly; 41-first linear module; 42-backing plate body; 43-first slide; 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 steel. DETAILED DESCRIPTION

[0016] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in the case of no conflict.

[0017] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0018] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0019] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0020] The upstream of the automatic welding system is provided with a strip steel automatic unwinding device, the downstream of the automatic welding system is provided with a strip steel storage device, the strip steel automatic unwinding device is provided with meter measurement and unwinding speed detection function, the strip steel storage device is used for storing galvanized steel plates to be wound and welded, the automatic welding system of the galvanized strip steel joint is arranged between the strip steel automatic unwinding device and the strip steel storage device, the automatic welding system of the galvanized strip steel joint is used for connecting the material head of the strip steel storage device and the strip steel automatic unwinding device, so as to connect the galvanized strip steel wound in different sections, meet the continuous production of the production line, and the strip steel storage device and the strip steel automatic unwinding device are prior art, such as Figures 1-21As shown, the automatic welding system of the galvanized strip steel joint comprises a welding assembly 1, an upstream butt joint assembly 2, a downstream butt joint assembly 3 and a backing plate assembly 4, the backing plate assembly 4 is arranged below the welding assembly 1, the upstream butt joint assembly 2 and the downstream butt joint assembly 3 are arranged on the two sides of the backing plate assembly 4 respectively, the upstream butt joint assembly 2 and the downstream butt joint assembly 3 are arranged oppositely, the upstream butt joint assembly 2 is used for clamping the upstream strip steel 5 joint, the downstream butt joint assembly 3 is used for clamping the downstream strip steel 5 joint, the welding assembly 1 is used for welding the upstream strip steel 5 joint and the downstream strip steel 5 joint, and the backing plate assembly 4 is used for backing the welding, the upstream butt joint assembly 2 and the downstream butt joint assembly 3 can move relatively, and the execution end of the backing plate assembly 4 can be lifted, the execution end is lifted to the limit position for positioning the upstream strip steel 5 joint and the downstream strip steel 5 joint, the execution end is lowered to the limit position for backing the welding of the upstream strip steel 5 joint and the downstream strip steel 5 joint, in the implementation, the welding ends of the upstream strip steel 5 and the downstream strip steel 5 need to be cut flat by laser cutting or cold saw cutting, and the upstream strip steel 5 and the downstream strip steel 5 to be welded are respectively connected to the upstream butt joint assembly 2 and the downstream butt joint assembly 3, the upstream butt joint assembly 2 will align the upstream strip steel 5 in the middle, the downstream butt joint assembly 3 will align the downstream strip steel 5 in the middle, and at this time, the backing plate assembly 4 is in the lifted state, the upstream butt joint assembly 2 drives the welding end of the upstream strip steel 5 to abut to one side of the backing plate assembly 4, and positions the origin of the welding end of the upstream strip steel 5, the downstream butt joint assembly 3 drives the welding end of the downstream strip steel 5 to abut to the other side of the backing plate assembly 4, and positions the origin of the welding end of the downstream strip steel 5, after the two origins are aligned, the two are welded by the welding assembly 1, which can guarantee the welding quality, and can automatically align in the middle, reducing the labor intensity of the workers.

[0021] The backing plate assembly 4 comprises a first linear module 41, a backing plate body 42, a first sliding table 43 and a first sliding frame 44, the two ends of the backing plate body 42 are respectively provided with the first sliding table 43, the periphery of each first sliding table 43 is slidably connected to one side of the first sliding frame 44, the first sliding table 43 and the first sliding frame 44 cooperate to define the sliding track of the backing plate body 42, and the backing plate body 42 of the embodiment is a copper alloy material of the prior art, the two first sliding frames 44 are arranged oppositely, and each first sliding frame 44 is fixedly installed on the base, and the base of the embodiment is a steel plate base which can be prevented on the cement base or placed on the steel skeleton and can be self-equipped according to the actual situation on the spot, the lower end of the backing plate 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 a push rod hydraulic cylinder of the prior art, the first linear module 41 is fixedly installed on the base, and the upper end of the backing plate body 42 is used for backing the welding of the upstream strip steel 5 joint and the downstream strip steel 5 joint; Two positioning plates 45 are arranged on both sides of the lining plate body 42, and the two positioning plates 45 correspond to the upstream docking assembly 2 and the downstream docking assembly 3 respectively. A plurality of positioning columns 46 are arranged on the side of each positioning plate 45 away from the upstream docking assembly 2 or the downstream docking assembly 3. A plurality of positioning holes are arranged on each side of the lining plate body 42, and each positioning hole corresponds to a positioning column 46. The positioning column 46 is peripherally and slidingly connected to a positioning hole, and the positioning hole is a blind hole. One end of the positioning column 46 is elastically connected to the bottom of the positioning hole through a first spring 47. The first spring 47 is used for elastically resetting the relative position of the positioning plate 45. The cooperation of the positioning column 46 and the positioning hole is used for limiting the sliding track of the positioning plate 45. An abutting column 48 is further arranged on the positioning plate 45 and is located on the same side of the positioning column 46. The abutting column 48 and the positioning column 46 are arranged in parallel with each other. A mounting hole is correspondingly arranged on the lining plate body 42, a first touch switch 49 is mounted in the mounting hole, and one end of the abutting column 48 can abut the execution end of the first touch switch 49. The first touch switch 49 is a micro switch in the prior art. When the strip steel 5 moves towards the positioning plate 45, the end of the strip steel 5 abuts the positioning plate 45 and drives the positioning plate 45 to move. When the positioning plate 45 drives the abutting column 48 to slide in the mounting hole, one end of the abutting column 48 gradually approaches the execution end of the first micro switch. When the end of the abutting column 48 abuts the execution end of the first micro switch, it means that the upstream or downstream strip steel 5 has been moved to the position. The positioning plate 45 and the first micro switch are positioned at the origin of the welding end of the strip steel 5. During installation, 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 a second spring 410. The other end of the first touch switch 49 is the execution end. The second spring 410 is used for the elastic resetting of the first touch switch 49, preventing the abutting column 48 and the first touch switch 49 from being in hard contact and causing damage to the parts. In this embodiment, the end of the abutting column 48 in contact with the first touch switch 49 is a circular truncated cone structure.

[0022] The welding assembly 1 comprises a second linear module 11, a second sliding table 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 push rod cylinder in the prior art. The third linear module 13 is fixedly installed on the second sliding table 12. The second sliding table 12 is fixedly installed on the movable end of the second linear module 11. The second linear module 11 is a lead screw linear sliding module in the prior art. 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 sliding table 12 and the welding head 14 to slide horizontally. When the welding head 14 approaches the joint position of the upstream and downstream strip steels 5, the welding head 14 welds the joint. The welding head 14 and the sliding distance of the second linear module 11 are preset values. The workers can install and adjust them according to the site conditions.

[0023] The polishing assembly 15 is arranged on the second sliding table 12, and the polishing assembly 15 and the welding head 14 are arranged in parallel with each other. The polishing assembly 15 is a pre-welding trimming structure of the end of the strip steel 5 to be welded. The polishing assembly 15 comprises a fourth linear module 151, a first guide rail 152, a first supporting plate 153, a second sliding frame 154 and a polishing head 155. The fourth linear module 151 is fixedly installed on the second sliding table 12. The fourth linear module 151 is a push rod cylinder in the prior art. The movable end of the fourth linear module 151 is installed with the first supporting plate 153. One side of the first supporting plate 153 is slidably connected to the first guide rail 152. The first guide rail 152 is fixedly installed on the second sliding table 12. The cooperation between the first supporting plate 153 and the first guide rail 152 is used to limit the sliding track of the first supporting plate 153. One end of the first supporting plate 153 is installed with the second sliding frame 154 through a first supporting rod. One polishing head 155 is correspondingly arranged on the upstream butt joint assembly 2 and the downstream butt joint assembly 3 respectively. Each polishing head 155 is slidably connected to the second sliding frame 154 through a third sliding table 156. The two third sliding tables 156 are oppositely arranged. One polishing motor 157 is arranged on each third sliding table 156. The output end of the polishing motor 157 is installed with the polishing head 155. The polishing motor 157 is a synchronous motor in the prior art. The polishing motor 157 is used to drive the polishing head 155 to rotate. The working end of the polishing head 155 is provided with diamond sand. The rotating polishing head 155 can polish and remove the oxides of the end of the strip steel 5 to be welded, so as to improve the welding quality.

[0024] As shown in Figures 9-13 , the polishing head 155 is used to polish the welding surface of the upstream joint of the strip steel 5 or the downstream joint of the strip steel 5. The lower end of the polishing head 155 is in a circular truncated cone structure. When the fourth linear module 151 drives the polishing head 155 to approach the end to be polished, the circular truncated cone structure facilitates the alignment of the polishing head 155. The circular truncated cone structure forms a wedge structure between the polishing head 155 and the end to be polished, so that the end to be polished can extrude the polishing head 155, and the polishing head 155 can slide on the second sliding frame 154. The side of the third sliding table 156 away from the upstream joint of the strip steel 5 or the downstream joint of the strip steel 5 is provided with an abutting spring 158. One end of the abutting spring 158 is elastically connected to the inner side wall of the second sliding frame 154. The abutting spring 158 is used to always provide a reset elastic force for the polishing head 155, so that the working position of the polishing head 155 is always attached to the end to be polished. The second sliding frame 154 is provided with a second guide rail 159. The third sliding table 156 is provided with a guide sliding hole. The second guide rail 159 is slidably connected to the guide sliding hole, so as to limit the sliding track of the third sliding table 156.

[0025] As shown in Figure 14As shown, the upstream docking assembly 2 and the downstream docking assembly 3 have the same structure, the upstream docking assembly 2 comprises a centering unit 21, a clamping unit 22, a conveying unit 23 and a buffer unit 24, the buffer unit 24 is installed on the base, a rack 25 is installed on the moving end of the buffer unit 24, the conveying unit 23, the centering unit 21 and the clamping unit 22 are sequentially arranged on the rack 25 along the running direction of the strip 5, the clamping unit 22 is located on one side of the backing plate assembly 4, the clamping unit 22 is used for clamping the end of the strip 5 to be welded, the buffer unit 24 drives the end of the strip 5 to be welded to approach or move away from the backing plate assembly 4 through the rack 25 and the clamping unit 22, the two sides of the strip 5 to be welded are respectively abutted to the inner side of the centering unit 21, the centering unit 21 is used for positioning the relative position of the strip 5 to be welded on the rack 25, and the conveying unit 23 is used for driving the strip 5 to linearly move on the rack 25.

[0026] As shown in Figures 15-17 The clamping unit 22 comprises an upper backing plate 221 and a lower backing plate 222, the lower backing plate 222 is installed on the rack 25 and located on one side of the backing plate assembly 4, the upper backing plate 221 is arranged parallel to the lower backing plate 222, the upper backing plate 221 is fixedly installed on the movable end of a fifth linear module 223, the fifth linear module 223 is a push rod cylinder in the prior art, the fifth linear module 223 is fixedly installed on a second support plate 224, the second support plate 224 is installed on the rack 25 through a second support rod, and a plurality of first sliding holes are arranged on the upper backing plate 221, the outer periphery of each second support rod is slidably connected to a first sliding block, and the fifth linear module 223 is used for driving the upper backing plate 221 to move relative to the lower backing plate 222, so as to clamp and position the relative position of the upstream strip 5 or the downstream strip 5.

[0027] The slow-moving unit 24 comprises a third supporting plate 241, a fourth supporting plate 242, a third guide rail 243, a first screw rod 244, a first supporting table plate 245 and a second supporting table plate 246, the third supporting plate 241 and the fourth supporting plate 242 are arranged in parallel to each other, the third supporting plate 241 and the fourth supporting plate 242 are respectively installed on the base, the periphery of the first screw rod 244 is respectively rotatably connected to the third supporting plate 241 and the fourth supporting plate 242, one third guide rail 243 is arranged on each side of the first screw rod 244, the periphery of each third guide rail 243 is respectively fixedly installed on the third supporting plate 241 and the fourth supporting plate 242, the lower end of the gantry 25 is fixedly installed with the first supporting table plate 245 and the second supporting table plate 246, the first supporting table plate 245 and the second supporting table plate 246 are arranged in parallel to each other, a plurality of supporting sliding holes are respectively arranged on the first supporting table plate 245 and the second supporting table plate 246, the supporting sliding holes are used for being slidably connected to the periphery of the third guide rail 243 or avoiding the first screw rod 244, a screw nut is installed on the first supporting table plate 245 or the second supporting table plate 246, the periphery of the first screw rod 244 is threadedly connected to the periphery of the screw nut, one end of the first screw rod 244 is fixedly connected to the output end of a servo motor, the servo motor is fixedly installed on the base, the servo motor is prior art, the rotation of the servo motor can drive the rotation of the first screw rod 244, so as to realize the movement of the first supporting table plate 245, the second supporting table plate 246 and the gantry 25 along the movement direction of the strip steel 5, so as to realize the butt joint of the upstream end of the strip steel 5 and the downstream end of the strip steel 5.

[0028] The centering unit 21 comprises two clamping heads 211, and the two clamping heads 211 are arranged opposite to each other, the gantry 25 is provided with a sliding groove, the middle part of each clamping head 211 is slidably connected into the sliding groove, the upper inner side of the clamping head 211 can abut to one side of the strip steel 5, and the lower inner side of the clamping head 211 can abut to one end of an adjusting head, and the adjusting head is installed on the lower side of the gantry 25, the two adjusting heads are arranged opposite to each other, and the adjusting head is an adjusting structure for the initial relative position of the clamping head 211, such as Figure 16As shown, the adjusting head comprises a fixed plate body 212, an abutting plate body 213 and an adjusting screw 214, the fixed plate body 212 is fixedly installed to the lower side of the rack 25, the adjusting screw 214 is peripherally screwed to the fixed plate body 212, and one end of the adjusting screw 214 is rotatably connected to the abutting plate body 213, the staff can adjust the relative position of the plate body abutting by screwing the adjusting screw 214, and one side of the clamping edge head 211 can be connected to the abutting plate body 213, and the other side of the clamping edge head 211 is elastically connected to the inner wall of the sliding groove through the third spring 215, under the joint action of the third spring 215 and the abutting plate body 213, the initial relative position of the clamping edge head 211 can be limited, and the two oppositely arranged clamping edge heads 211 can limit the relative position of the two side edges of the steel strip 5, if the steel strip 5 is not centered in the initial state, the clamping edge head 211 can also slide in the sliding groove and compress the third spring 215, the third spring 215 always provides the clamping edge head 211 with a reset elasticity, and the steel strip 5 can be gradually centered in the process of linear movement of the steel strip 5.

[0029] As shown, Figure 17 The middle part of the adjusting screw 214 is provided with a positioning sliding hole, a positioning sliding column 216 is slidably connected in the positioning sliding hole, and the positioning sliding column 216 is fixedly installed to the abutting plate body 213. The cooperation of the positioning sliding hole and the positioning sliding column 216 can limit the sliding track of the clamping edge head 211 and support the relative position of the clamping edge head 211, so as to prevent the clamping edge head 211 from being bent and causing the problem of limit not stopping. A guide roller 217 is rotatably installed on the inner side of the upper part of the clamping edge head 211. The outer periphery of the guide roller 217 can be rollingly connected to one side of the steel strip 5, so as to reduce the friction of the linear movement of the steel strip 5 on the clamping edge head 211 and prevent the damage of the parts. A guide table 218 is arranged on one side of the guide roller 217. The guide table 218 is installed to the side of the clamping edge head 211 away from the lining plate assembly 4. The inner side of the guide table 218 is provided with a guide slope for guiding the end of the steel strip 5. The guide table 218 is a guide structure for the movement of the end of the steel strip 5 to the clamping edge head 211. When the steel strip 5 moves between the two clamping edge heads 211, the two clamping edge heads 211 can adaptively move to both sides through the guidance of the guide table 218, so as to prevent the clamping edge head 211 from being bent by the side edge of the steel strip 5.

[0030] The conveying unit 23 is a matching structure of the centering unit 21, comprising an upper pressing roller 231 and a lower pressing roller 232, both ends of the upper pressing roller 231 and the lower pressing roller 232 are rotatably connected to the rack 25 respectively, the upper surface of the strip steel 5 is rollingly connected to the periphery of the upper pressing roller 231, the lower surface of the strip steel 5 is rollingly connected to the periphery of the lower pressing roller 232, one end of the lower pressing roller 232 is fixedly connected to the output end of a conveying motor, the conveying motor is fixedly installed to the rack 25; both ends of the upper pressing roller 231 are rotatably connected to the middle part of a tension sliding block 233 respectively, the periphery of each tension sliding block 233 is slidingly connected to an axle seat 234, and each axle seat 234 is installed to the rack 25, the cross section of the axle seat 234 is a reverse U-shaped structure, the upper end of the tension sliding block 233 is elastically connected to the inner wall of the top of the reverse U-shaped structure through a fourth spring 235, the conveying motor is a power motor in the prior art, the upper and lower surfaces of the strip steel 5 are rollingly connected to the peripheries of the upper pressing roller 231 and the lower pressing roller 232 respectively, the upper pressing roller 231 can be always pressed to the surface of the strip steel 5 through the fourth spring 235, so as to realize the linear conveying of the strip steel 5, the linear movement of the strip steel 5 is driven by the conveying unit 23, the side edges of the strip steel 5 are gradually centered by the extrusion of the centering unit 21, the strip steel 5 detection switch 26 is installed on the rack 25, and the strip steel 5 detection switch 26 is located on one side of the clamping unit 22, the execution end of the strip steel 5 detection switch 26 faces one side of the strip steel 5, and the strip steel 5 detection switch 26 is an optical sensor in the prior art.

[0031] The working process of the strip steel and the strip steel material belt in the upstream and the downstream are centered: The tooling personnel adjusts the relative positions of the adjusting screw 214, so that the initial positions of the two clamping edge heads 211 are in the preset value state, the end of the strip steel 5 in the upstream is inserted between the upper pressing roller 231 and the lower pressing roller 232, the conveying motor is positively rotated, the end of the strip steel 5 is gradually abutted to the guide table 218 or the guide roller 217, when the end of the strip steel 5 is abutted to the guide table 218, the corresponding clamping edge head 211 moves outwardly under the influence of the slope surface of the guide table 218, at this time, the third spring 215 is not centered, and the strip steel 5 in the upstream is not centered, the conveying motor continues to be positively rotated, when the strip steel 5 detection switch 26 detects the end of the strip steel 5, the conveying motor stops positive rotation and is converted to direction rotation, after a certain number of direction rotations, the conveying motor is converted to positive rotation, and the process is repeated, the side edges of the strip steel 5 are elastically extruded by the third spring 215, so that the strip steel 5 can be gradually centered, the tooling personnel visually checks that the guide rollers 217 of the two clamping edge heads 211 are in the rotating state when the strip steel 5 linearly moves, which indicates that the strip steel 5 is in the centered state, the strip steel 5 material belt in the downstream is centered in the same way as the strip steel 5 material belt in the upstream, and the direction is opposite, so the working process of the strip steel 5 material belt in the downstream is not described here.

[0032] The working process of the strip steel and the strip steel welding end head origin positioning in the upstream and the downstream: After the upstream strip steel 5 material belt is centered, the conveying motor drives the strip steel 5 to move linearly, and the end of the strip steel 5 gradually abuts against the alignment plate 45. When the alignment plate 45 drives the abutting column 48 to abut against the first touch switch 49, the strip steel 5 is moved to the position, the clamping unit 22 clamps the strip steel 5, the conveying motor is not rotating, the slow-moving unit 24 drives the rack 25 and the clamping unit 22 to retreat by a set distance, the end of the strip steel 5 is not in contact with the alignment plate 45, the alignment plate 45 is reset, the end of the strip steel 5 downstream is positioned in the same way as the upstream positioning mode, and the direction is opposite, so the working process of the end of the strip steel 5 downstream positioning the origin is not described here. After the upstream strip steel 5 and the downstream strip steel 5 are welded and the end of the strip steel 5 is positioned at the origin, the first linear module 41 drives the backing plate body 42 to descend, the slow-moving unit 24 drives the rack 25 and the clamping unit 22 to extend by a set distance, at this time, the end of the strip steel 5 upstream and the end of the strip steel 5 downstream are not in contact, but can cover the backing plate body 42.

[0033] After the end of the strip steel 5 upstream and the end of the strip steel 5 downstream are positioned at the origin, the fourth linear module 151 extends, and the two polishing heads 155 abut against the end of the strip steel 5 upstream and the end of the strip steel 5 downstream respectively. By driving the polishing motor 157, the welding position can be polished, and after the polishing is completed, the welding head 14 can be used for welding.

[0034] The control mode of the embodiment is controlled by a controller. The control circuit of the controller can be realized by simple programming of those skilled in the art, and the power supply also belongs to the common knowledge in the art. The present document mainly protects the mechanical device, and the control mode and circuit connection are not described in detail.

[0035] The above only describes the preferred embodiments of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

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 lining assembly (4), wherein the lining assembly (4) is arranged below the welding assembly (1), and the upstream butt joint assembly (2) and the downstream butt joint assembly (3) are respectively arranged on both sides of the lining 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 lining assembly (4) is used to cushion the welding, characterized in that: The upstream docking assembly (2) and the downstream docking assembly (3) are capable of relative movement, and the execution end of the lining assembly (4) is capable of rising and falling. The execution end rises to a limit position for positioning the upstream strip steel (5) joint and the downstream strip steel (5) joint, and the execution end descends to a limit position for lining the welding of the upstream strip steel (5) joint and the downstream strip steel (5) joint.

2. The automatic welding system for galvanized steel strip joints according to claim 1, characterized in that: The lining assembly (4) includes a first linear module (41), a lining body (42), a first slide (43) and a first slide (44). The first slides (43) are respectively installed at both ends of the lining body (42). The outer periphery of each first slide (43) is slidably connected to one side of a first slide (44). The two first slides (44) are arranged opposite to each other. Each first slide (44) is fixedly installed on the foundation. The lower end of the lining body (42) is fixedly installed on the movable end of the first linear module (41). The first linear module (41) is fixedly installed on the foundation. The upper end of the lining body (42) is used to cushion the welding of the upstream strip steel (5) joint and the downstream strip steel (5) joint.

3. The automatic welding system for galvanized steel strip joints according to claim 2, characterized in that: A positioning plate (45) is provided on each side of the lining plate body (42), and the two positioning plates (45) correspond to the upstream docking assembly (2) and the downstream docking assembly (3) respectively. A plurality of positioning posts (46) are provided on the side of each positioning plate (45) away from the upstream docking assembly (2) or the downstream docking assembly (3). A plurality of positioning holes are provided on each side of the lining plate body (42), and each positioning hole corresponds to an positioning post (46). The periphery of the positioning post (46) is slidably connected to an alignment hole, and the alignment hole is a blind hole. One end of the positioning post (46) is elastically connected to the bottom of the alignment hole through a first spring (47); An abutment column (48) is further provided on the alignment plate (45) and abuts against the same side of the alignment column (46). The abutment column (48) and the alignment column (46) are arranged parallel to each other. A mounting hole is correspondingly provided on the lining plate body (42). A first touch switch (49) is installed in the mounting hole. One end of the abutment column (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 a second spring (410), and the other end of the first touch switch (49) is an execution end; One end of the abutting column (48) that contacts the first touch 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) comprises 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 mounted to the movable end of the third linear module (13); the third linear module (13) is fixedly mounted on the second slide (12); the second slide (12) is fixedly mounted to the movable end of the second linear module (11); the second linear module (11) is fixedly mounted on a foundation; the third linear module (13) is used to drive the welding head (14) to approach or move away from an object to be welded; and 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) comprises 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 mounted on the second slide (12), the first support plate (153) is mounted 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 mounted on the second slide (12), one end of the first support plate (153) is mounted on the second slide (154) through the first support rod, the upstream docking assembly (2) and the downstream docking assembly (3) are respectively provided with a corresponding grinding head (155), each grinding head (155) is respectively slidably connected to the second slide (154) through a third slide (156), and the two third slides (156) are arranged opposite to each other, a grinding motor (157) is provided on each third slide (156), and the grinding head (155) is installed on 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, and the lower end of the grinding head (155) is a frustum structure. A contact spring (158) is provided on the side of the third slide (156) away from the upstream strip steel (5) joint or the downstream strip steel (5) joint, and one end of the contact spring (158) is elastically connected to the inner end wall of the second slide (154), and a second guide rail (159) is provided on the second slide (154). A guide slide hole is provided on the third slide (156), and the outer periphery of the second guide rail (159) is slidably connected to the guide slide 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 a centering unit (21), a clamping unit (22), a conveying unit (23) and a slow-moving unit (24). The slow-moving unit (24) is installed on the foundation. A platform (25) is installed on the moving end of the slow-moving unit (24). The conveying unit (23), the centering unit (21) and the clamping unit (22) are sequentially arranged on the platform (25) along the traveling direction of the strip steel (5). The clamping unit (22) is located at the lining assembly ( 4), a clamping unit (22) is used to clamp the end of the strip steel (5) to be welded, and a slow-moving unit (24) drives the end of the strip steel (5) to be welded to be close to or away from the liner assembly (4) through the stand (25) and the clamping unit (22), and both sides of the strip steel (5) to be welded are respectively abutted against the inner side of the centering unit (21), and the centering unit (21) is used to locate the relative position of the strip steel (5) to be welded on the stand (25), and the conveying unit (23) is used to drive the strip steel (5) to move linearly on the stand (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 platform (25) and is located on one side of the lining 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 to the second support plate (224), the second support plate (224) is mounted on the platform (25) through the second support rod, and a plurality of first sliding holes are provided on the upper pad (221), and the outer periphery of each second support rod is slidably connected to a first sliding block.

8. The automatic welding system for galvanized steel strip joints according to claim 6, characterized in that: The slow-moving 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 in parallel with each other. The third support plate (241) and the fourth support plate (242) are respectively installed on the foundation. The 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 respectively arranged on both sides of the first lead screw (244). The periphery of each third guide rail (243) is respectively fixedly installed to the third support plate (241) and the fourth support plate (246). 2), a first support table (245) and a second support table (246) are fixedly installed at the lower end of the platform (25), the first support table (245) and the second support table (246) are arranged parallel to each other, and a plurality of support sliding holes are respectively provided on the first support table (245) and the second support table (246), and the support sliding holes are used to slide and connect to the periphery of the third guide rail (243) or avoid the first lead screw (244), and a lead screw nut is installed on the first support table (245) or the second support table (246), and the periphery of the first lead screw (244) is threadedly connected to the periphery of the lead screw nut, and one end of the first lead screw (244) is fixedly connected to the output end of the servo motor, and 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), and the two clamping heads (211) are arranged opposite to each other. A slide groove is provided on the platform (25), and the middle part of each clamping head (211) is slidably connected to the slide groove. The upper inner side of the clamping head (211) can abut against one side of the strip steel (5), and the lower inner side of the clamping head (211) can abut against one end of an adjusting head, and the adjusting head is installed on the lower side of the platform (25), and the two adjusting heads are arranged opposite to each other. The adjusting head comprises a fixed plate (212), an abutting plate (213) and an adjusting screw (214); the fixed plate (212) is fixedly mounted on the lower side of the platform (25); the outer periphery of the adjusting screw (214) is threadedly connected to the fixed plate (212), and one end of the adjusting screw (214) is rotatably connected to the abutting plate (213); One side of the edge clamping head (211) can be connected to the abutting plate (213), and the other side of the edge clamping head (211) is elastically connected to the inner wall of the sliding groove through a third spring (215); A positioning sliding hole is provided in the middle of the adjusting screw (214), and a positioning sliding post (216) is slidably connected in the positioning sliding hole, and the positioning sliding post (216) is fixedly installed on the abutting plate (213); A guide roller (217) is rotatably mounted on the inner side of the upper portion of the edge clamping head (211), and the outer periphery of the guide roller (217) is capable of rolling and connecting to one side of the strip steel (5); A guide platform (218) is provided on one side of the guide roller (217), and the guide platform (218) is installed on the side of the clamping head (211) away from the liner assembly (4). A guide slope is provided on the inner side of the guide platform (218), and the guide slope is used to guide the end of the strip steel (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 pressing roller (231) and a lower pressing roller (232), both ends of the upper pressing roller (231) and the lower pressing roller (232) are respectively rotatably connected to the platform (25), the upper surface of the steel strip (5) is rollingly connected to the periphery of the upper pressing roller (231), and the lower surface of the steel strip (5) is rollingly connected to the periphery of the lower pressing roller (232), one end of the lower pressing roller (232) is fixedly connected to the output end of the conveying motor, and the conveying motor is fixedly installed on the platform (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 an axle seat (234), and each axle seat (234) is mounted on the stand (25), the cross section of the axle seat (234) is an inverted U-shaped structure, and 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 steel (5) detection switch (26) is installed on the stand (25), and the strip steel (5) detection switch (26) is located on one side of the clamping unit (22), with the execution end of the strip steel (5) detection switch (26) facing one side of the strip steel (5).

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