Reinforcing mesh welding production line

Abstract

The invention discloses a reinforcing mesh welding production line. Transferring pieces are rotationally arranged on the lower portions in the tops of a first station frame and a second station frame correspondingly. The first welding mechanism and the second welding mechanism are arranged on the inner side of the first station frame; the third welding mechanism and the fourth welding mechanism are arranged on the inner side of the channel of the second station frame, the reshipment trolley is arranged in the channel formed by the first station frame and the second station frame, and the hoisting trolley is arranged on one side of the fourth welding mechanism. The transfer trolley runs in a channel formed by the two station frames and is responsible for transporting semi-finished products welded by the first welding mechanism, the second welding mechanism and the third welding mechanism, and after the fourth welding mechanism completes final welding work, the hoisting trolley enters from the side, away from the second station frame, of the fourth welding mechanism and is used for hoisting the semi-finished products. And the machined workpieces are hoisted and prepared for next treatment or transportation, so that the manual labor cost is reduced, and meanwhile, the production safety and stability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of steel mesh welding, and in particular to a steel mesh welding production line. Background Art

[0002] The traditional steel bars used in reinforced concrete are tied manually. The application of welded steel mesh has changed the traditional steel bar tying construction method, from manual operation to industrialization and commercialization. This new type of reinforcement technology has the characteristics of improving project quality, simplifying construction, shortening construction period, saving steel, and reducing construction costs. It is particularly suitable for large-scale concrete projects.

[0003] Steel mesh is welded by welding longitudinal and transverse steel bars. The steel mesh welding machine feeds the steel bars into the steel mesh welding machine in both the warp and weft directions. After welding, the finished steel mesh can be obtained. At present, most steel mesh welding machines can only complete the welding of steel mesh in steps and cannot form a production line. Therefore, when welding steel mesh, it is necessary to use a straightening machine to straighten and cut the transverse steel bar coil to the set length in advance, and the longitudinal line needs to be manually threaded and aligned, and the transverse line also needs to be placed in the designated device by people, which makes the connection of the production process poor. After welding, the mesh needs to be manually arranged, resulting in high labor intensity and low work efficiency, which makes it difficult to meet the development needs of industrialization in the bridge construction industry.

[0004] Therefore, a steel mesh welding production line is urgently needed to solve the above problems. Summary of the invention

[0005] The embodiment of the present application provides a steel mesh welding production line, aiming to reduce the intensity of manual labor while improving the welding efficiency of the steel mesh.

[0006] To achieve the above objectives, this application provides the following technical solutions: A steel mesh welding production line comprises a first work frame, a second work frame, a first welding mechanism, a second welding mechanism, a third welding mechanism, a fourth welding mechanism, a transport trolley and a lifting trolley; The first workstation frame and the second workstation frame are both in an inverted U-shaped structure as a whole. The first workstation frame and the second workstation frame are arranged at intervals to form a horizontal space channel. Transfer parts are rotatably arranged at the inner and lower parts of the tops of the first workstation frame and the second workstation frame. The reverse transport trolley is arranged in the channel formed by the first workstation frame and the second workstation frame, and is used to transport the semi-finished products welded by the first welding mechanism, the second welding mechanism and the third welding mechanism; The first welding mechanism and the second welding mechanism are arranged at intervals on the inner side of the channel of the first workbench, the first welding mechanism is used to weld the first steel bar to form a first semi-finished product, and the second welding mechanism is used to weld the second steel bar to form a second semi-finished product; The third welding mechanism and the fourth welding mechanism are arranged at intervals on the inner side of the channel of the second workbench, the third welding mechanism is used to weld the third steel bar to form a third semi-finished product, and the fourth welding mechanism is used to weld the first semi-finished product, the second semi-finished product and the third semi-finished product to form a total finished product; A transfer member is used to transfer the first semi-finished product and the second semi-finished product welded by the first welding mechanism and the second welding mechanism to the inverting trolley; Another transfer member is used to transfer the third semi-finished product welded by the third welding mechanism and the first semi-finished product and the second semi-finished product transported by the inverting trolley to the inverting trolley; The hoisting trolley is arranged on a side of the fourth welding mechanism away from the second workstation frame, and is used for hoisting the finished product processed by the fourth welding mechanism.

[0007] Further, the transfer part includes a swing arm and a grasping robot; One end of the swing arm is fixedly arranged on the top of the first workstation frame and the second workstation frame, and the other end thereof extends horizontally; The grabbing robot is arranged at the bottom of the swing arm, and the fixed end of the grabbing robot is fixedly arranged at one end of the swing arm away from the first workstation and the second workstation. The output end of the grabbing robot extends downward and is used to transport the first semi-finished product, the second semi-finished product, and the third semi-finished product formed by the first welding mechanism, the second welding mechanism, and the third welding mechanism.

[0008] Further, the first welding mechanism includes: a first working frame, a first placement frame, a plurality of first welding guns and a first handling robot arm; The first working frame is spaced apart and arranged inside the first work station frame; The first placement rack is arranged on one side of the first working rack, and the placement surface of the first placement rack is at the same level as the working surface of the first working rack; A plurality of first welding guns are slidably arranged on the first working frame, and output ends of the plurality of first welding guns are symmetrically arranged on upper and lower sides of the first working frame; the output ends of the plurality of first welding guns correspond to the welding point positions of the first steel bars; The first transport robot arm is arranged on one side of the first placement rack close to the first work station rack, and can slide along the conveying direction from the first placement rack to the first work rack, and is used for conveying the first steel bar from the first placement rack to the first work rack.

[0009] Furthermore, a limiting component for restraining the first steel bar is provided at the connection between the top of the first working frame and the first steel bar; The limiting assembly includes a first pressing plate, a plurality of second pressing plates, a plurality of limiting plates, a plurality of guide columns, a traveling trolley, a pressing rod and a cam; The first pressing plate is arranged on the top of the first working frame, and the plate length direction of the first pressing plate is consistent with the conveying direction of the first steel bar; A plurality of second pressing plates are arranged on the top of the first pressing plate and are arranged at intervals along the length direction of the first pressing plate. One end of each of the plurality of second pressing plates is hinged to the outer side of the first pressing plate, and the other end thereof can be opened or closed to the inner side of the first pressing plate, so as to form a space for constraining the ends of the plurality of first steel bars. A plurality of limit plates are arranged at intervals along the length direction of the first pressing plate and are located between adjacent second pressing plates. The length direction of the plurality of limit plates is consistent with the width direction of the first pressing plate. The tops of the plurality of limit plates are provided with limit grooves adapted to the first steel bars. One end of each of the plurality of guide posts vertically passes through the inner side of the top of the second pressing plate, and the other end thereof is fixedly connected to the bottom of the first pressing plate; The walking trolley is slidably arranged on the slide rail of the first working frame and is located on a side of the first pressing plate away from the end of the first steel bar, and can slide back and forth on the first working frame along the plate length direction of the first pressing plate; One end of the pressure rod extends obliquely to the inside of the traveling trolley, and a slideway is provided on one side of the slide rail close to the second pressing plate. The end of the pressure rod extending into the traveling trolley is slidably connected to the slideway. The sliding path of the slideway is a U-shaped structure. The pressure rod can reciprocate along the U-shaped path, and the other end of the pressure rod can generate different depths of extrusion pressure on the second pressing plate during the reciprocating motion. The cam is rotatably arranged at one end of the pressure rod away from the traveling trolley, and a part of the circumference of the cam abuts against the top plate surface of the second pressure plate, and the axial length direction of the cam is parallel to the axial length direction of the pressure rod.

[0010] Furthermore, a first elastic member is fixedly arranged between the first pressing plate and the second pressing plate, one end of the first elastic member is fixed to the bottom of the first pressing plate, and the other end thereof is fixedly arranged on the top of the second pressing plate.

[0011] Furthermore, a snap-on assembly is provided at the bottom of one side of the second pressing plate close to the limiting plate, a positioning groove for accommodating the snap-on assembly is provided on the plate surface of one side of the first pressing plate close to the second pressing plate, a variable diameter groove is provided inside the first pressing plate along its length direction, a narrow diameter section of the variable diameter groove is connected to the groove cavity of the positioning groove, and a snap-on assembly is slidably provided in the groove cavity of the variable diameter groove; When the second pressing plate approaches the first pressing plate, the clamping assembly can form a locking fit with the buckle assembly; when the second pressing plate continues to approach the first pressing plate, the clamping assembly can form an unlocking fit with the buckle assembly.

[0012] Furthermore, the clamping assembly includes a mounting seat, a connecting column, a first limiting block, a second limiting block and two second elastic members; The mounting seat is arranged at the bottom of one side of the second pressing plate close to the limiting plate; The connecting column is vertically arranged on a side surface of the mounting seat close to the first pressing plate; The first limit block with a truncated cone structure is fixedly arranged at one end of the connecting column away from the second pressing plate, with its small diameter surface facing the side away from the mounting seat, and the side surface of the first limit block contacts the working end surface of the buckle assembly; The second limit block has the same structure as the first limit block. The second limit block is slidably arranged on the periphery of the connecting column and is mirror-arranged with the first limit block along the radial direction of the connecting column. It can approach or move away from the first limit block along the axial length direction of the connecting column. The circumference of the second limit block is arranged in a continuous manner with the circumference of the first limit block. Two second elastic members are symmetrically arranged around the circumference of the connecting column and are spaced apart from the working end of the buckle assembly. One end of the two second elastic members is fixedly connected to a side of the second limit block away from the first limit block, and the other end is fixedly connected to a side of the mounting seat close to the connecting column, so as to reset the second limit block. The buckle assembly includes a clamping plate, a clamping block and a third elastic member; One end of the clamping plate extends into the groove cavity in the wide diameter section of the diameter-changing groove, and the other end thereof extends into the groove cavity of the positioning groove, and its end surface abuts against the side surface of the first limit block; The clamping block is arranged at one end of the clamping plate away from the positioning groove, and is slidably arranged in the groove cavity of the wide diameter section of the variable diameter groove, and the longitudinal cross-sectional area of ​​the clamping block is larger than the cross-sectional area of ​​the narrow diameter section of the variable diameter groove; One end of the third elastic member is fixedly arranged on a side plate surface of the clamping block close to the clamping plate, and the other end thereof is fixedly arranged on a corresponding surface of the wide diameter section of the diameter-changing groove for resetting the clamping plate.

[0013] Further, the second welding mechanism includes: a second placement rack, a second working rack, a plurality of second welding guns and a second transport robot arm; The second work frame is arranged on a side of the first work frame away from the first work frame; The second placement rack is arranged on one side of the second working rack, and the placement surface of the second placement rack and the working surface of the second working rack are at the same level; A plurality of second welding guns are slidably arranged on the second working frame, and output ends of the plurality of second welding guns are vertically symmetrically arranged on upper and lower sides of the first working frame, and the output ends of the plurality of second welding guns are correspondingly arranged at welding point positions of the second steel bars; The second transport robot arm is arranged on a side of the second placement rack close to the first workbench and can slide along the conveying direction from the second placement rack to the second workbench for conveying the second steel bar from the second placement rack to the second workbench.

[0014] Further, the third welding mechanism includes a third placement rack, a third working rack, a plurality of third welding guns and a third transport robot arm; The third work frame is arranged on one side of the second work frame; The third placement rack is arranged on one side of the third working rack, and the placement surface of the third placement rack and the working surface of the third working rack are at the same horizontal height; A plurality of third welding guns are slidably arranged on the third working frame, and output ends of the plurality of third welding guns are horizontally symmetrically arranged on the left and right sides of the third working frame, and the output ends of the plurality of third welding guns are correspondingly arranged at the welding point positions of the third steel bars; The third transport robot arm is arranged on one side of the third placement rack close to the second work station rack, and can slide along the conveying direction from the third placement rack to the third work rack, and is used for conveying the third steel bar from the third placement rack to the third work rack.

[0015] Further, the fourth welding mechanism includes a fourth working frame, a fourth placement frame, a plurality of fourth welding guns and a fourth handling robot arm; The fourth work frame is arranged on a side of the second work frame away from the third work frame; The fourth placement rack is arranged on one side of the fourth working rack, and the placement surface of the fourth placement rack and the working surface of the fourth working rack are at the same horizontal height; A plurality of fourth welding guns are slidably arranged on the fourth workbench, and output ends of the plurality of fourth welding guns are vertically symmetrically arranged on the left and right sides of the fourth workbench, and the output ends of the plurality of fourth welding guns are correspondingly arranged at the welding point positions of the first semi-finished product, the second semi-finished product, and the third semi-finished product; The fourth transport robot arm is slidably arranged on one side of the fourth placement rack close to the second work station rack, and can slide along the fourth placement rack to the conveying direction of the fourth work rack, and is used to transport the first semi-finished product, the second semi-finished product, and the third semi-finished product transported by the transfer cart.

[0016] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: In the present application, the first welding mechanism welds the first steel bar, and the second welding mechanism welds the second steel bar; in the second work frame, the third welding mechanism welds the third steel bar, and the fourth welding mechanism is responsible for combining and welding the first steel bar, the second steel bar and the third steel bar into the final steel mesh, thereby improving production efficiency. Among them, the reverse transport trolley runs in the channel formed by the two work frames, and is responsible for transporting the semi-finished products welded by the first welding mechanism, the second welding mechanism and the third welding mechanism. When the fourth welding mechanism completes the final welding work, the hoisting trolley enters from the side of the fourth welding mechanism away from the second work frame, hoists the processed workpiece, and prepares for the next step of processing or transportation, thereby reducing the need for manual intervention, reducing the labor cost, and improving the safety and stability of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of the general assembly provided in the embodiment of the present application; Figure 2 A schematic diagram of the structure of a first welding mechanism provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a second welding mechanism provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of a third welding mechanism provided in an embodiment of the present application; Figure 5 A schematic structural diagram of a fourth welding mechanism provided in an embodiment of the present application; Figure 6 for Figure 2 A partial enlarged view of the middle A area; Figure 7 It is a schematic diagram of the structure of the first pressing plate and the second pressing plate in this application; Figure 8 , Fig. 9 , Fig.10 and Fig.11 It is a structural schematic diagram of the locking and unlocking process of the first pressing plate and the second pressing plate in this application; Fig.12 This is a schematic diagram of the structure of the slide rail in the present application when viewed from the front.

[0019] Icons: 1-first steel bar; 2-second steel bar; 3-third steel bar; 4-fourth steel bar; 10-first work station; 11-second work station; 12-transfer trolley; 13-lifting trolley; 14-transportation part; 141-swing arm; 142-grasping robot; 20-first welding mechanism; 21-first working frame; 211-slide rail; 2111-slideway; 22-first placement frame; 23-first welding gun; 24-first handling robot arm; 25-limiting assembly; 251-first pressure plate; 2511-positioning groove; 2512-diameter reducing groove; 2513-card plate; 2514-card block; 2515-third elastic member; 252-second pressure plate; 2521-mounting seat; 2522- Connecting column; 2523-first limiting block; 2524-second limiting block; 2525-second elastic member; 253-limiting plate; 2531-limiting groove; 254-guide column; 255-traveling trolley; 256-pressure rod; 257-cam; 258-first elastic member; 30-second welding mechanism; 31-second working frame; 32-second placement frame; 33-second welding gun; 34-second handling robot arm; 40-third welding mechanism; 41-third working frame; 42-third placement frame; 43-third welding gun; 44-third handling robot arm; 50-fourth welding mechanism; 51-fourth working frame; 52-fourth placement frame; 53-fourth welding gun; 54-fourth handling robot arm. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] In the description of the embodiments of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present application. The terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0022] like Figure 1-Figure 12 As shown, a steel mesh welding production line includes a first workbench 10, a second workbench 11, a first welding mechanism 20, a second welding mechanism 30, a third welding mechanism 40, a fourth welding mechanism 50, a transfer trolley 12 and a lifting trolley 13; the first workbench 10 and the second workbench 11 are both inverted U-shaped structures as a whole, the first workbench 10 and the second workbench 11 are arranged at intervals to form a horizontal space channel, and transfer parts 14 are rotatably arranged at the inner and lower parts of the tops of the first workbench 10 and the second workbench 11; the transfer trolley 12 is arranged in the channel formed by the first workbench 10 and the second workbench 11, and is used to transport semi-finished products welded by the first welding mechanism 20, the second welding mechanism 30, and the third welding mechanism 40; the first welding mechanism 20 and the second welding mechanism 30 are arranged at intervals on the inner side of the channel of the first workbench 10, and the first welding mechanism 20 is used to weld the first steel bar 1 to form a The first semi-finished product, the second welding mechanism 30 is used to weld the second steel bar 2 to form the second semi-finished product; the third welding mechanism 40 and the fourth welding mechanism 50 are arranged at intervals on the inner side of the channel of the second workbench 11, the third welding mechanism 40 is used to weld the first steel bar 1 to form the third semi-finished product, and the fourth welding mechanism 50 is used to weld the first semi-finished product, the second semi-finished product, and the third semi-finished product to form a total finished product; a transfer member 14 is used to transfer the first semi-finished product and the second semi-finished product formed by welding of the first welding mechanism 20 and the second welding mechanism 30 to the inverting trolley 12; another transfer member 14 is used to transfer the third semi-finished product formed by welding of the third welding mechanism 40 and the first semi-finished product and the second semi-finished product transported by the inverting trolley 12 to the inverting trolley 12; the hoisting trolley 13 is arranged on the side of the fourth welding mechanism 50 away from the second workbench 11, and is used to hoist the total finished product processed by the fourth welding mechanism 50.

[0023] In the above scheme, inside the first work frame 10, the first welding mechanism 20 welds the first steel bar 1 to form a first semi-finished product, and the second welding mechanism 30 welds the second steel bar 2 to form a second semi-finished product; inside the second work frame 11, the third welding mechanism 40 welds the third steel bar 3 to form a third semi-finished product, and the fourth welding mechanism 50 is responsible for welding the first semi-finished product, the second semi-finished product, and the third semi-finished product to form the final steel mesh finished product. When the fourth welding mechanism 50 completes the welding work of the steel mesh finished product, the hoisting trolley 13 enters from the side of the fourth welding mechanism 50 away from the second work frame 11, hoists the steel mesh finished product, and prepares for the next step of processing or transportation, which reduces the need for manual intervention, reduces the labor cost, and improves the safety and stability of production.

[0024] The steel mesh welding production line provided in the present application transfers semi-finished products to the welding mechanisms in the first work frame 10 and the second work frame 11 respectively through two transfer parts 14, and the transfer trolley 12 moves in the channel formed by the first work frame 10 and the second work frame 11, and is responsible for transporting the first semi-finished product, the second semi-finished product and the third semi-finished product formed by welding of the first welding mechanism 20, the second welding mechanism 30 and the third welding mechanism 40. Among them, one transfer part 14 transfers the first semi-finished product and the second semi-finished product formed by welding of the first welding mechanism 20 and the second welding mechanism 30 to the transfer trolley 12; the other transfer part 14 transfers the third semi-finished product formed by welding of the third welding mechanism 40 and the first semi-finished product and the second semi-finished product transported by the transfer trolley 12 to the transfer trolley 12, so that the conveying, welding and finished product transportation process of the steel bars are smoother and more efficient.

[0025] The transfer member 14 includes a swing arm 141 and a grasping robot 142; one end of the swing arm 141 is fixedly arranged at the top of the first work frame 10 and the second work frame 11, and the other end thereof extends horizontally; the grasping robot 142 is arranged at the bottom of the swing arm 141, and the fixed end of the grasping robot 142 is fixedly arranged at one end of the swing arm 141 away from the first work frame 10 and the second work frame 11, and the output end of the grasping robot 142 extends downward, and is used for carrying the first semi-finished product, the second semi-finished product, and the third semi-finished product formed by the first welding mechanism 20, the second welding mechanism 30, and the third welding mechanism 40.

[0026] In the above scheme, one end of the swing arm 141 is fixedly arranged on the top of the first station frame 10 and the second station frame 11, and the other end extends horizontally, so that the swing arm 141 can swing between the two stations, thereby covering the working areas of the first station frame 10 and the second station frame 11. The horizontal extension design of the swing arm 141 allows the steel bars to move smoothly between the two stations, avoiding the safety hazards caused by manual operation. The grabbing robot 142 can accurately control the position and movement path of the steel bars through its control system. When the semi-finished products need to be transported, the grabbing robot 142 grabs the first semi-finished product, the second semi-finished product and the third semi-finished product through its output end; after the grabbing is completed, the swing arm 141 starts to swing, and the corresponding first semi-finished product, the second semi-finished product and the third semi-finished product are placed on the inverting trolley 12 or the external semi-finished product placement area, so that the transportation process of the first semi-finished product, the second semi-finished product and the third semi-finished product is more automated and efficient. When the first semi-finished product, the second semi-finished product and the third semi-finished product arrive at the target workstation on the transfer trolley 12 or the external semi-finished product placement area, the grasping robot 142 releases the corresponding semi-finished products through the clamping device at its output end. After the release is completed, the grasping robot 142 returns to the initial position and prepares for the next grasping and transfer, thereby shortening the production cycle of the steel mesh.

[0027] It is feasible that one end of the two swing arms 141 close to the first work frame 10 and the second work frame 11 can slide back and forth along the span direction of the first work frame 10 and the second work frame 11. Preferably, a slide can be set on the top of one end of the two swing arms 141 close to the first work frame 10 and the second work frame 11, and the two slides are slidably arranged on the top of the first work frame 10 and the second work frame 11 respectively, which can drive the two swing arms 141 to slide back and forth with the corresponding first work frame 10 and the second work frame 11 in the span direction.

[0028] The first welding mechanism 20 includes: a first working frame 21, a first placement frame 22, a plurality of first welding guns 23 and a first handling robot arm 24; the first working frame 21 is arranged at intervals on the inner side of the first station frame 10; the first placement frame 22 is arranged on one side of the first working frame 21, and the placement surface of the first placement frame 22 is at the same horizontal height as the working surface of the first working frame 21; a plurality of first welding guns 23 are slidably arranged on the first working frame 21, and the output ends of the plurality of first welding guns 23 are symmetrically arranged on the upper and lower sides of the first working frame 21; the output ends of the plurality of first welding guns 23 correspond to the welding point positions of the first steel bar 1; the first handling robot arm 24 is arranged on one side of the first placement frame 22 close to the first station frame 10, and can slide along the conveying direction of the first placement frame 22 to the first working frame 21, and is used to convey the first steel bar 1 from the first placement frame 22 to the first working frame 21.

[0029] In the above scheme, the first working frame 21 is arranged at intervals on the inner side of the first work frame 10, providing a stable working platform. The first placement frame 22 is arranged on one side of the first working frame 21, and its placement surface is at the same horizontal height as the working surface of the first working frame 21, so as to facilitate the smooth transition of the steel bars. A plurality of first welding guns 23 are slidably arranged on the first working frame 21, and their output ends are symmetrically arranged on the upper and lower sides of the first working frame 21 to ensure all-round welding of the steel bars. The output ends of the plurality of first welding guns 23 correspond to the welding point positions of the second steel bars 2, so as to ensure that the first welding gun 23 can accurately locate the points that need to be welded on the first steel bars 1, thereby ensuring that human errors are reduced during the welding process of the first steel bars 1, and improving the quality of the first semi-finished product formed after the first steel bars 1 are welded.

[0030] A limiting assembly 25 for restraining the first steel bar 1 is provided at the connection between the top of the first working frame 21 and the first steel bar 1; the limiting assembly 25 includes a first pressing plate 251, a plurality of second pressing plates 252, a plurality of limiting plates 253, a plurality of guide columns 254, a walking trolley 255, a pressing rod 256 and a cam 257; the first pressing plate 251 is provided at the top of the first working frame 21, and the plate length direction of the first pressing plate 251 is consistent with the conveying direction of the first steel bar 1; a plurality of second pressing plates 252 are provided at the top of the first pressing plate 251, and along the first pressing plate 251 The plurality of second pressing plates 252 are arranged at intervals in the plate length direction, one end of each of the plurality of second pressing plates 252 is hinged to the outer side of the first pressing plate 251, and the other end thereof can be opened or closed with the inner side of the first pressing plate 251, so as to form a space for constraining the ends of the plurality of first steel bars 1; the plurality of limiting plates 253 are arranged at intervals in the plate length direction of the first pressing plate 251, and are located between adjacent second pressing plates 252, the plate length direction of the plurality of limiting plates 253 is consistent with the plate width direction of the first pressing plate 251, and the tops of the plurality of limiting plates 253 are provided with limiting grooves 2531 adapted to the first steel bars 1; the plurality of One end of the guide column 254 vertically passes through the inner side of the top of the second pressing plate 252, and the other end thereof is fixedly connected to the bottom of the first pressing plate 251; the walking trolley 255 is slidably arranged on the slide rail 211 of the first working frame 21, and is located on the side of the first pressing plate 251 away from the end of the first steel bar 1, and can slide back and forth on the first working frame 21 along the plate length direction of the first pressing plate 251; one end of the pressing rod 256 obliquely extends to the inside of the walking trolley 255, and a slideway 2111 is provided on the side of the slide rail 211 close to the second pressing plate 252, and the pressing rod 256 extends The end of the walking trolley 255 is slidably connected to the slide 2111, and the sliding path of the slide 2111 is a U-shaped structure. The pressure rod 256 can reciprocate along the U-shaped path, and the other end of the pressure rod 256 can generate different depths of extrusion pressure on the second pressure plate 252 during the reciprocating motion; the cam 257 is rotatably set at the end of the pressure rod 256 away from the walking trolley 255, and part of the circumference of the cam 257 is against the top plate surface of the second pressure plate 252, and the axial length direction of the cam 257 is parallel to the axial length direction of the pressure rod 256.

[0031] In the above scheme, the first pressing plate 251 is fixed to the top of the first working frame 21, and its length direction is consistent with the conveying direction of the first handling robot arm 24, providing an installation foundation for the second pressing plate 252 and the limiting plate 253. The second pressing plate 252 is arranged at intervals along the length direction of the first pressing plate 251, and is connected to the first pressing plate 251 by a hinged manner, and can be opened or closed to form a space to constrain the end of the first steel bar 1. The guide column 254 vertically passes through the second pressing plate 252 and is fixed to the bottom of the first pressing plate 251, providing support and guidance for the opening and closing of the second pressing plate 252. The limiting plate 253 is located between adjacent second pressing plates 252, and a limiting groove 2531 adapted to the first steel bar 1 is provided on the top to fix the position of the first steel bar 1. The guide column 254 vertically passes through the second pressing plate 252 and is fixed to the bottom of the first pressing plate 251, providing support and guidance for the opening and closing of the second pressing plate 252. The slide rail 211 is disposed on the top of the first work frame 21 and is spaced apart from the second pressing plate 252 to prevent the second pressing plate 252 from interfering with the displacement of the trolley 255. When the trolley 255 is displaced, the slide rail 2111 having a U-shaped sliding path can constrain the pressing rod 256 slidably disposed inside the trolley 255 to perform telescopic movement, so that the pressing rod 256 moves away from the cam 257 on one end of the trolley 255 and approaches or moves away from the top end surface of the second pressing plate 252.

[0032] When the first handling robot arm 24 delivers the first steel bar 1 to the first work frame 21, the walking trolley 255 first moves to the initial position. Subsequently, the walking trolley 255 slides along the length direction of the first work frame 21 along the plate length direction of the first pressing plate 251, and drives the cam 257 at the end of the pressing rod 256 to rotate during the sliding process of the walking trolley 255. During the rotation process, the curvature of the cam 257 changes, so that when the curvature of the cam 257 changes from the lowest point to the highest point, the circumference of the cam 257 continuously presses the top end surface of the second pressing plate 252 and pushes the second pressing plate 252 to rotate around the hinge point until the second pressing plate 252 is engaged with the first pressing plate 251, and the end of the first steel bar 1 is contacted and constrained, and the limiting groove 2531 on the limiting plate 253 is adapted to the first steel bar 1, constraining the moving path of the first steel bar 1 along its radial direction. Through the cooperation of the walking trolley 255, the pressure rod 256 and the cam 257, the automatic restraint and release of the first steel bar 1 are realized, the manual intervention of the walking trolley is reduced, and the labor intensity of the staff is alleviated.

[0033] It is feasible that the end surface of one side of the second pressing plate 252 in the present application that contacts the cam 257 is an arc surface, so that the cam 257 can stably connect with each second pressing plate 252 and press against the top surface of each second pressing plate 252.

[0034] It should be noted that when the traveling trolley 255 makes a forward motion, one end of the pressure rod 256 located inside the traveling trolley 255 slides on a path on the side of the slide 2111 away from the first working frame 21, so that the other end of the pressure rod 256 presses against the top surface of the second pressure plate 252 for the first time, and the second pressure plate 252 and the first pressure plate 251 are squeezed for the first time; when the traveling trolley 255 makes a return motion, one end of the pressure rod 256 located inside the traveling trolley 255 slides on a path on the side of the slide 2111 close to the first working frame 21, so that the other end of the pressure rod 256 presses against the top surface of the second pressure plate 252 again, so that the depth of pressing the second pressure plate 252 again becomes larger, and the second pressure plate 252 and the first pressure plate 251 are squeezed again.

[0035] During the welding process, the limit assembly 25 ensures the stable contact between the first steel bar 1 and the first work frame 21, which facilitates the welding gun to perform precise welding. After the welding is completed, the trolley 255 slides in the opposite direction, driving the cam 257 to rotate in the opposite direction, so that the second pressure plate 252 is opened, and the trolley 255 moves to the initial position again, ready to receive the next batch of steel bars. The first steel bar 1 is precisely positioned and constrained by the second pressure plate 252 and the limit plate 253, reducing the displacement and shaking of the first steel bar 1 during welding, and improving the welding accuracy.

[0036] A first elastic member 258 is fixedly disposed between the first pressing plate 251 and the second pressing plate 252 . One end of the first elastic member 258 is fixed to the bottom of the first pressing plate 251 , and the other end thereof is fixed to the top of the second pressing plate 252 .

[0037] In the above solution, when the first pressing plate 251 and the second pressing plate 252 are in an unconnected state, the first elastic member 258 is in an uncompressed state. When the two begin to connect, that is, the arc of the first pressing plate 251 and the second pressing plate 252 gradually decreases, the first elastic member 258 begins to be compressed. When the first pressing plate 251 and the second pressing plate 252 are unlocked, the deformation ability of the first elastic member 258 can assist the second pressing plate 252 to separate from the first pressing plate 251, thereby realizing the automatic unlocking of the first pressing plate 251 and the second pressing plate 252.

[0038] A snap-fit ​​assembly is provided at the bottom of one side of the second pressing plate 252 close to the limiting plate 253, a positioning groove 2511 for accommodating the snap-fit ​​assembly is provided on the plate surface of one side of the first pressing plate 251 close to the second pressing plate 252, a reducing groove 2512 is provided inside the first pressing plate 251 along its length direction, a narrow diameter section of the reducing groove 2512 is communicated with the groove cavity of the positioning groove 2511, a snap-fit ​​assembly is slidably provided in the groove cavity of the reducing groove 2512; when the second pressing plate 252 approaches the first pressing plate 251, the snap-fit ​​assembly can form a locking fit with the snap-fit ​​assembly; when the second pressing plate 252 continues to approach the first pressing plate 251, the snap-fit ​​assembly can form an unlocking fit with the snap-fit ​​assembly.

[0039] The clamping assembly includes a mounting seat 2521, a connecting column 2522, a first limiting block 2523, a second limiting block 2524 and two second elastic members 2525; the mounting seat 2521 is arranged at the bottom of one side of the second pressing plate 252 close to the limiting plate 253; the connecting column 2522 is vertically arranged on a side surface of the mounting seat 2521 close to the first pressing plate 251; the first limiting block 2523, which is an overall truncated cone structure, is fixedly arranged at one end of the connecting column 2522 away from the second pressing plate 252, and its small diameter surface faces the side away from the mounting seat 2521, and the side surface of the first limiting block 2523 conflicts with the working end surface of the buckle assembly; the second limiting block 2524 has the same structure as the first limiting block 2523, and the second limiting block 252 The second stopper 2524 is slidably arranged on the periphery of the connecting column 2522, and is mirror-arranged with the first stopper 2523 along the radial direction of the connecting column 2522, and can approach or move away from the first stopper 2523 along the axial length direction of the connecting column 2522. The periphery of the second stopper 2524 is arranged in a continuation with the periphery of the first stopper 2523. The two second elastic members 2525 are symmetrically arranged on the periphery of the connecting column 2522, and are spaced apart from the working end of the buckle assembly. One end of the two second elastic members 2525 is fixedly connected to a side of the second stopper 2524 away from the first stopper 2523, and the other end thereof is fixedly connected to a side of the mounting seat 2521 close to the connecting column 2522, for resetting the second stopper 2524. The buckle assembly includes a card plate 2513, a card block 2514 and a third elastic member 2515; one end of the card plate 2513 extends into the groove cavity in the wide diameter section of the variable diameter groove 2512, and the other end thereof extends into the groove cavity of the positioning groove 2511, and its end face abuts against the side face of the first limit block 2523; the card block 2514 is arranged at one end of the card plate 2513 away from the positioning groove 2511, and is slidably arranged in the groove cavity of the wide diameter section of the variable diameter groove 2512, and the longitudinal cross-sectional area of ​​the card block 2514 is larger than the cross-sectional area of ​​the narrow diameter section of the variable diameter groove 2512; one end of the third elastic member 2515 is fixedly arranged on a side plate surface of the card block 2514 close to the card plate 2513, and the other end thereof is fixedly arranged on the corresponding surface of the wide diameter section of the variable diameter groove 2512, for resetting the card plate 2513.

[0040] like Figure 8-Figure 12As shown, in the above scheme, in the initial state, the mounting seat 2521 is fixed on the second pressing plate 252, the connecting column 2522 extends vertically, and the first limit block 2523 is fixed on the top of the connecting column 2522, with the small diameter surface facing the direction away from the mounting seat 2521. The second limit block 2524 is slidably arranged around the connecting column 2522. Due to the deformation constraint of the second elastic member 2525, the second limit block 2524 initially maintains a certain distance from the first limit block 2523. One end of the clamping plate 2513 extends into the wide diameter section of the reducing groove 2512, and the other end enters the positioning groove 2511, and its end face maintains a certain gap or slight conflict with the side surface of the first limit block 2523. The clamping block 2514 is arranged at one end of the clamping plate 2513 away from the positioning groove 2511, and slides in the wide diameter section of the reducing groove 2512. One end of the third elastic member 2515 is connected to the clamping block 2514 , and the other end is fixed to the surface corresponding to the wide diameter section of the diameter-changing groove 2512 , so as to provide a restoring force for the clamping plate 2513 .

[0041] Locking process: When the first pressing plate 251 and the second pressing plate 252 are in the open state and the traveling trolley 255 is moving, one end of the pressing rod 256 located inside the traveling trolley 255 slides on the path of the slideway 2111 away from the first working frame 21, so that the cam 257 continuously presses the top surface of the second pressing plate 252, forcing the second pressing plate 252 to continuously move closer to the side close to the first pressing plate 251. When the second pressing plate 252 approaches and contacts the first pressing plate 251, the first limiting block 2523 first enters the positioning groove 2511 and contacts the end surface of the clamping plate 2513. As the second pressing plate 252 continues to move, the circumference of the first limiting block 2523 forces the clamping plate 2513 and the clamping block 2514 thereon to move toward the wide diameter section in the reducing groove 2512, until the clamping plate 2513 completely moves to the side of the first limiting block 2523 close to the second limiting block 2524 and abuts against the connecting column 2522, and is clamped with the side of the first limiting block 2523 close to the mounting seat 2521, thereby locking the second pressing plate 252 and the first pressing plate 251. At this time, the first elastic member 258 is in a compressed state, the second elastic member 2525 is in a non-compressed state, and the third elastic member 2515 is in a stretched state, providing the necessary restoring force for unlocking.

[0042] Unlocking process: When the traveling trolley 255 makes a return motion, one end of the pressure rod 256 located inside the traveling trolley 255 slides on a side path of the slideway 2111 close to the first working frame 21, so that the other end of the pressure rod 256 presses the top surface of the second pressure plate 252 again, and the cam 257 at the end of the pressure rod 256 presses each second pressure plate 252 again, and the second pressure plate 252 moves toward the bottom of the positioning groove 2511.

[0043] During this process, the end face of the card plate 2513 away from the first limit block 2523 will continue to be squeezed with the end face of the second limit block 2524 close to the first limit block 2523, driving the second limit block 2524 along the axial length direction of the connecting column 2522 to the side close to the mounting seat 2521 and compressing the second elastic member 2525 for the first time, until the end face of the card plate 2513 away from the first limit block 2523 abuts against the end face of the second limit block 2524 close to the mounting seat 2521, at which time the second elastic member 2525 returns to its initial state. Since the first elastic member 258 is in a release trend, the circumference of the second limit block 2524 and the end face of the card plate 2513 close to the first limit block 2523 continue to be compressed, and at this time the second elastic member 2525 is in a stretched state.

[0044] When the card plate 2513 gradually moves to the edge of the circumference of the second limit block 2524, the deformation of the second elastic member 2525 makes the second limit block 2524 tend to approach the mounting seat 2521. When the card plate 2513 completely moves to the edge of the circumference of the second limit block 2524, the pressure rod 256 leaves the top surface of the current second pressure plate 252, so that the second pressure plate 252 loses the squeezing force of the pressure rod 256. Due to the instantaneous force generated during the release of the first elastic member 258, the tendency of the second pressure plate 252 to separate from the first pressure plate 251 is aggravated. 13 clamps the circumference of the second limit block 2524, so that the second limit block 2524 and the clamping plate 2513 slide as a whole relative to the connecting column 2522 and move in the direction of the first limit block 2523, so that the second limit block 2524 contacts the first limit block 2523, and then due to the continued release of the first elastic member 258, the clamping plate 2513 can smoothly slide off from the outer sides of the second limit block 2524 and the first limit block 2523, and finally the first pressure plate 251 and the second pressure plate 252 are opened, and the clamping plate 2513 recovers to its initial state due to the deformation of the third elastic member 2515.

[0045] The present application can realize the quick plugging and unplugging and locking and unlocking of the snap assembly and the buckle assembly by pressing the second pressing plate 252, which is easy and quick to operate, and can adapt to different plugging and unplugging force and locking force requirements by adjusting the bevel angle of the first limit block 2523 and the second limit block 2524, the size of the clamping block 2514, and the elastic force of the first elastic member 258, the second elastic member 2525 and the third elastic member 2515, thereby improving the adaptability and flexibility of the structure. The push-type plug-in structure makes it easy to disassemble and replace the connecting piece between the first pressing plate 251 and the second pressing plate 252, which is convenient for maintenance and care.

[0046] It is feasible that the inner side of the second pressing plate 252 and the inner side of the first pressing plate 251 are both provided with soft pads, and the circumferential surface of the soft pads abuts against the circumferential surface of the steel bars, so that the first pressing plate 251 and the second pressing plate 252 will not have rigid contact with the steel bars during the clamping and extrusion process.

[0047] The second welding mechanism 30 includes: a second placement rack 32, a second working rack 31, a plurality of second welding guns 33 and a second handling robot arm 34; the second working rack 31 is arranged on a side of the first station rack 10 away from the first working rack 21; the second placement rack 32 is arranged on one side of the second working rack 31, and the placement surface of the second placement rack 32 and the working surface of the second working rack 31 are at the same horizontal height; a plurality of second welding guns 33 are slidably arranged on the second working rack 31, and the output ends of the plurality of second welding guns 33 are vertically symmetrically arranged on the upper and lower sides of the first working rack 21, and the output ends of the plurality of second welding guns 33 are correspondingly arranged at the welding point positions of the second steel bar 2; the second handling robot arm 34 is arranged on a side of the second placement rack 32 close to the first working rack 10, and can slide along the conveying direction of the second placement rack 32 to the second working rack 31, and is used to convey the second steel bar 2 from the second placement rack 32 to the second working rack 31.

[0048] In the above scheme, before welding begins, the second steel bar 2 is placed on the second placement rack 32. When welding is required, the second handling robot arm 34 grabs a steel bar and places it accurately at a predetermined position on the second work rack 31, and then multiple second welding guns 33 start working to weld the steel bars from both the upper and lower directions. After welding is completed, the second handling robot arm 34 may move the welded steel bars out of the working area to prepare for the next round of welding of the second steel bar 2. By using multiple second welding guns 33 to weld from both the upper and lower directions at the same time, the welding time is shortened and the production efficiency is improved. The output end of the second welding gun 33 is accurately aligned with the welding point position, reducing welding defects and improving welding quality, and the output end of the second welding gun 33 can also provide better welding strength and uniformity by welding from both the upper and lower directions. The use of the second handling robot arm 34 reduces the need for manual operation and improves the degree of automation of the entire welding process.

[0049] The third welding mechanism 40 includes a third placement rack 42, a third work rack 41, a plurality of third welding guns 43 and a third transport robot arm 44; the third work rack 41 is arranged on one side of the second work station rack 11; the third placement rack 42 is arranged on one side of the third work rack 41, and the placement surface of the third placement rack 42 and the work surface of the third work rack 41 are at the same horizontal height; a plurality of third welding guns 43 are slidably arranged on the third work rack 41, and the output ends of the plurality of third welding guns 43 are horizontally symmetrically arranged on the left and right sides of the third work rack 41, and the output ends of the plurality of third welding guns 43 are correspondingly arranged at the welding point positions of the third steel bar 3; the third transport robot arm 44 is arranged on one side of the third placement rack 42 close to the second work station rack 11, and can slide along the conveying direction of the third placement rack 42 to the third work rack 41, and is used to convey the third steel bar 3 from the third placement rack 42 to the third work rack 41.

[0050] In the above scheme, before welding begins, the third steel bar 3 is neatly placed on the third placement rack 42. When welding is required, the third handling robot arm 44 grabs a steel bar according to a preset program and places it accurately at a predetermined position on the third work rack 41. Subsequently, multiple third welding guns 43 start working, and the output ends of multiple third welding guns 43 weld the steel bars from both left and right directions at the same time. After welding is completed, the handling robot arm may move the welded steel bars out of the working area to prepare for the next round of welding of the third steel bar 3. By using multiple third welding guns 43 to weld from both left and right directions at the same time, the welding cycle of the third steel bar 3 is shortened. The output end of the third welding gun 43 is accurately aligned with the welding point position, reducing welding defects and improving the strength and reliability of the welded joint. The output end of the third welding gun 43 welding from both left and right directions can also provide better welding uniformity and appearance quality. The use of the third handling robot arm 44 reduces the need for manual operation and improves the automation level of the entire welding process. The third welding gun 43 and the third handling robot arm 44 can both move along their respective tracks, which enables the entire welding mechanism to flexibly adapt to the welding requirements of steel bars of different sizes and shapes.

[0051] The fourth welding mechanism 50 includes a fourth work frame 51, a fourth placement frame 52, a plurality of fourth welding guns 53 and a fourth handling robot arm 54; the fourth work frame 51 is arranged on a side of the second station frame 11 away from the third work frame 41; the fourth placement frame 52 is arranged on one side of the fourth work frame 51, and the placement surface of the fourth placement frame 52 is at the same horizontal height as the working surface of the fourth work frame 51; a plurality of fourth welding guns 53 are slidably arranged on the fourth work frame 51, and the output ends of the plurality of fourth welding guns 53 are vertically symmetrically arranged on the left and right sides of the fourth work frame 51, and the output ends of the plurality of fourth welding guns 53 are correspondingly arranged at the welding point positions of the first semi-finished product, the second semi-finished product, and the third semi-finished product; the fourth handling robot arm 54 is slidably arranged on a side of the fourth placement frame 52 close to the second station frame 11, and can slide along the conveying direction of the fourth placement frame 52 to the fourth work frame 51, and is used to transport the first semi-finished product, the second semi-finished product, and the third semi-finished product transported from the inverting trolley 12.

[0052] In the above scheme, before welding begins, the welding point positions of the first semi-finished product composed of the first steel bar 1, the second semi-finished product composed of the second steel bar 2, and the third semi-finished product composed of the third steel bar 3 are neatly placed on the fourth placement rack 52 by the fourth handling robot 54. When welding is required, the fourth handling robot 54 places the first semi-finished product, the second semi-finished product, and the third semi-finished product according to the preset program, and accurately places them at the predetermined position on the fourth work rack 51. Subsequently, multiple fourth welding guns 53 start working, and the output end of the fourth welding gun 53 welds each semi-finished product from the left and right sides in the vertical direction at the same time. After welding is completed, the fourth handling robot 54 removes the welded total finished product from the fourth work rack 51, obtains the steel mesh total finished product and transports it to the hoisting trolley 13, and prepares for the next round of welding or hoisting operations. The present application shortens the welding time by using multiple fourth welding guns 53 to weld from the left and right sides in the vertical direction at the same time. The output end of the fourth welding gun 53 is accurately aligned with the welding point position, which helps to reduce welding defects and improve the strength and reliability of the welded joint. The fourth welding gun 53 and the fourth handling robot arm 54 can both move along their respective tracks, so that the entire fourth welding mechanism 50 can flexibly adapt to the welding requirements of steel bars of different sizes and shapes.

[0053] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0054] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A steel mesh welding production line, characterized in that: It comprises a first work frame (10), a second work frame (11), a first welding mechanism (20), a second welding mechanism (30), a third welding mechanism (40), a fourth welding mechanism (50), a transport trolley (12) and a lifting trolley (13); The first work frame (10) and the second work frame (11) are both in an inverted U-shaped structure as a whole; the first work frame (10) and the second work frame (11) are arranged at intervals to form a horizontal space channel; and transfer members (14) are rotatably arranged at the inner lower part of the top of the first work frame (10) and the second work frame (11); The transfer trolley (12) is arranged in a channel formed by the first workstation frame (10) and the second workstation frame (11), and is used to transport semi-finished products welded by the first welding mechanism (20), the second welding mechanism (30), and the third welding mechanism (40); The first welding mechanism (20) and the second welding mechanism (30) are arranged at intervals on the inner side of the channel of the first workstation frame (10); the first welding mechanism (20) is used to weld the first steel bar (1) to form a first semi-finished product; and the second welding mechanism (30) is used to weld the second steel bar (2) to form a second semi-finished product; The third welding mechanism (40) and the fourth welding mechanism (50) are arranged at intervals on the inner side of the channel of the second workstation frame (11); the third welding mechanism (40) is used to weld the third steel bar (3) to form a third semi-finished product; and the fourth welding mechanism (50) is used to weld the first semi-finished product, the second semi-finished product, and the third semi-finished product to form a total finished product; A transfer member (14) is used to transfer the first semi-finished product and the second semi-finished product formed by welding by the first welding mechanism (20) and the second welding mechanism (30) to the transfer trolley (12); Another transfer member (14) is used to transfer the third semi-finished product formed by welding by the third welding mechanism (40) and the first semi-finished product and the second semi-finished product transported by the transfer trolley (12) to the transfer trolley (12); The hoisting trolley (13) is arranged on a side of the fourth welding mechanism (50) away from the second workstation frame (11) and is used for hoisting the finished product after processing by the fourth welding mechanism (50).

2. The steel mesh welding production line according to claim 1, characterized in that: The transport unit (14) comprises a swing arm (141) and a grasping robot (142); One end of the swing arm (141) is fixedly arranged on the top of the first work frame (10) and the second work frame (11), and the other end thereof extends horizontally; The grasping robot (142) is arranged at the bottom of the swing arm (141), and the fixed end of the grasping robot (142) is fixedly arranged at one end of the swing arm (141) away from the first workstation (10) and the second workstation (11), and the output end of the grasping robot (142) extends downwardly and is used for carrying the first semi-finished product, the second semi-finished product, and the third semi-finished product formed by the first welding mechanism (20), the second welding mechanism (30), and the third welding mechanism (40).

3. The steel mesh welding production line according to claim 1, characterized in that: The first welding mechanism (20) comprises: a first working frame (21), a first placement frame (22), a plurality of first welding guns (23) and a first transport robot arm (24); The first working frame (21) is arranged at an interval on the inner side of the first work station frame (10); The first placement rack (22) is arranged on one side of the first working rack (21), and the placement surface of the first placement rack (22) and the working surface of the first working rack (21) are at the same level; A plurality of the first welding guns (23) are slidably arranged on the first working frame (21), and output ends of the plurality of the first welding guns (23) are symmetrically arranged on upper and lower sides of the first working frame (21); the output ends of the plurality of the first welding guns (23) correspond to the welding point positions of the first steel bar (1); The first transport robot arm (24) is arranged on a side of the first placement rack (22) close to the first work station rack (10), and is capable of sliding along a conveying direction from the first placement rack (22) to the first working rack (21), and is used for conveying the first steel bar (1) from the first placement rack (22) to the first working rack (21).

4. The steel mesh welding production line according to claim 3 is characterized in that: A limiting component (25) for restraining the first steel bar (1) is provided at the connection between the top of the first working frame (21) and the first steel bar (1); The limiting assembly (25) comprises a first pressing plate (251), a plurality of second pressing plates (252), a plurality of limiting plates (253), a plurality of guide columns (254), a walking trolley (255), a pressing rod (256) and a cam (257); The first pressing plate (251) is arranged on the top of the first working frame (21), and the plate length direction of the first pressing plate (251) is consistent with the conveying direction of the first steel bar (1); A plurality of second pressing plates (252) are arranged on top of the first pressing plate (251) and are spaced apart along the length direction of the first pressing plate (251); one end of each of the plurality of second pressing plates (252) is hinged to the outside of the first pressing plate (251), and the other end of each of the plurality of second pressing plates (252) can be opened or closed to the inside of the first pressing plate (251), so as to form a space for constraining the ends of the plurality of first steel bars (1); A plurality of the limiting plates (253) are arranged at intervals along the length direction of the first pressing plate (251) and are located between adjacent second pressing plates (252); the length direction of the plurality of limiting plates (253) is consistent with the width direction of the first pressing plate (251); and the tops of the plurality of limiting plates (253) are provided with limiting grooves (2531) adapted to the first steel bar (1); One end of each of the plurality of guide columns (254) vertically passes through the inner side of the top of the second pressing plate (252), and the other end thereof is fixedly connected to the bottom of the first pressing plate (251); The walking trolley (255) is slidably disposed on the slide rail (211) of the first working frame (21) and is located on a side of the first pressing plate (251) away from the end of the first steel bar (1), and is capable of sliding back and forth on the first working frame (21) along the length direction of the first pressing plate (251); One end of the pressure rod (256) extends obliquely to the interior of the walking trolley (255); a slideway (2111) is provided on one side of the slide rail (211) close to the second pressure plate (252); the end of the pressure rod (256) extending into the walking trolley (255) is slidably connected to the slideway (2111); the sliding path of the slideway (2111) is a U-shaped structure; the pressure rod (256) can reciprocate along the U-shaped path, and the other end of the pressure rod (256) can generate different depths of squeezing force on the second pressure plate (252) during the reciprocating motion; The cam (257) is rotatably arranged at one end of the pressure rod (256) away from the traveling trolley (255), and a part of the circumference of the cam (257) abuts against the top plate surface of the second pressure plate (252), and the axial length direction of the cam (257) is parallel to the axial length direction of the pressure rod (256).

5. The steel mesh welding production line according to claim 4, characterized in that: A first elastic member (258) is fixedly arranged between the first pressing plate (251) and the second pressing plate (252), one end of the first elastic member (258) being fixed to the bottom of the first pressing plate (251) and the other end of the first elastic member (258) being fixed to the top of the second pressing plate (252).

6. The steel mesh welding production line according to claim 5, characterized in that: A snap-fit ​​assembly is provided at the bottom of one side of the second pressing plate (252) close to the limiting plate (253); a positioning groove (2511) for accommodating the snap-fit ​​assembly is provided on the plate surface of one side of the first pressing plate (251) close to the second pressing plate (252); a reducing groove (2512) is provided inside the first pressing plate (251) along its length direction; a narrow diameter section of the reducing groove (2512) is connected to the groove cavity of the positioning groove (2511); a snap-fit ​​assembly is slidably provided in the groove cavity of the reducing groove (2512); When the second pressing plate (252) approaches the first pressing plate (251), the snap-fit ​​assembly can form a locking fit with the buckle assembly; when the second pressing plate (252) continues to approach the first pressing plate (251), the snap-fit ​​assembly can form an unlocking fit with the buckle assembly.

7. The steel mesh welding production line according to claim 6, characterized in that: The clamping assembly comprises a mounting seat (2521), a connecting column (2522), a first limiting block (2523), a second limiting block (2524) and two second elastic members (2525); The mounting seat (2521) is arranged at the bottom of one side of the second pressing plate (252) close to the limiting plate (253); The connecting column (2522) is vertically arranged on a side surface of the mounting seat (2521) close to the first pressing plate (251); The first limit block (2523) having an overall truncated cone structure is fixedly arranged at one end of the connecting column (2522) away from the second pressing plate (252), with its small diameter surface facing the side away from the mounting seat (2521), and the side surface of the first limit block (2523) abuts against the working end surface of the buckle assembly; The second limit block (2524) has the same structure as the first limit block (2523). The second limit block (2524) is slidably arranged on the periphery of the connecting column (2522) and is mirror-arranged with the first limit block (2523) along the radial direction of the connecting column (2522). The second limit block (2524) can approach or move away from the first limit block (2523) along the axial length direction of the connecting column (2522). The circumferential surface of the second limit block (2524) is arranged in a continuous manner with the circumferential surface of the first limit block (2523). The two second elastic members (2525) are symmetrically arranged around the connecting column (2522) and are spaced apart from the working end of the buckle assembly. One end of the two second elastic members (2525) is fixedly connected to a side of the second limit block (2524) away from the first limit block (2523), and the other end is fixedly connected to a side of the mounting seat (2521) close to the connecting column (2522), so as to reset the second limit block (2524). The buckle assembly comprises a clamping plate (2513), a clamping block (2514) and a third elastic member (2515); One end of the clamping plate (2513) extends into the groove cavity in the wide diameter section of the diameter-changing groove (2512), and the other end thereof extends into the groove cavity of the positioning groove (2511), and its end surface abuts against the side surface of the first limiting block (2523); The clamping block (2514) is arranged at one end of the clamping plate (2513) away from the positioning groove (2511), and is slidably arranged in the groove cavity of the wide diameter section of the diameter-changing groove (2512); the longitudinal cross-sectional area of ​​the clamping block (2514) is larger than the cross-sectional area of ​​the narrow diameter section of the diameter-changing groove (2512); One end of the third elastic member (2515) is fixedly arranged on a side plate surface of the clamping block (2514) close to the clamping plate (2513), and the other end is fixedly arranged on a corresponding surface of the wide diameter section of the diameter-changing groove (2512) for resetting the clamping plate (2513).

8. The steel mesh welding production line according to claim 3, characterized in that: The second welding mechanism (30) comprises: a second placement rack (32), a second working rack (31), a plurality of second welding guns (33) and a second transport robot arm (34); The second working frame (31) is arranged on a side of the first work frame (10) away from the first working frame (21); The second placement rack (32) is arranged on one side of the second working rack (31), and the placement surface of the second placement rack (32) and the working surface of the second working rack (31) are at the same level; A plurality of second welding guns (33) are slidably arranged on the second working frame (31), and output ends of the plurality of second welding guns (33) are vertically symmetrically arranged on upper and lower sides of the first working frame (21), and the output ends of the plurality of second welding guns (33) are correspondingly arranged at welding point positions of the second steel bars (2); The second transport robot arm (34) is arranged on a side of the second placement rack (32) close to the first work station rack (10), and is capable of sliding along a conveying direction from the second placement rack (32) to the second working rack (31), and is used to convey the second steel bars (2) from the second placement rack (32) to the second working rack (31).

9. The steel mesh welding production line according to claim 1, characterized in that: The third welding mechanism (40) comprises a third placement rack (42), a third working rack (41), a plurality of third welding guns (43) and a third transport robot arm (44); The third working frame (41) is arranged on one side of the second working frame (11); The third placement rack (42) is arranged on one side of the third working rack (41), and the placement surface of the third placement rack (42) and the working surface of the third working rack (41) are at the same horizontal height; A plurality of the third welding guns (43) are slidably arranged on the third working frame (41), the output ends of the plurality of the third welding guns (43) are horizontally symmetrically arranged on the left and right sides of the third working frame (41), and the output ends of the plurality of the third welding guns (43) are correspondingly arranged at the welding point positions of the third steel bars (3); The third transport robot arm (44) is arranged on a side of the third placement rack (42) close to the second work station rack (11), and is capable of sliding along a conveying direction from the third placement rack (42) to the third working rack (41), and is used to convey the third steel bar (3) from the third placement rack (42) to the third working rack (41).

10. The steel mesh welding production line according to claim 9, characterized in that: The fourth welding mechanism (50) comprises a fourth working frame (51), a fourth placement frame (52), a plurality of fourth welding guns (53) and a fourth transport robot arm (54); The fourth working frame (51) is arranged on a side of the second work frame (11) away from the third working frame (41); The fourth placement rack (52) is arranged on one side of the fourth working rack (51), and the placement surface of the fourth placement rack (52) and the working surface of the fourth working rack (51) are at the same horizontal height; A plurality of the fourth welding guns (53) are slidably arranged on the fourth working frame (51), and output ends of the plurality of the fourth welding guns (53) are vertically symmetrically arranged on the left and right sides of the fourth working frame (51), and the output ends of the plurality of the fourth welding guns (53) are correspondingly arranged at welding point positions of the first semi-finished product, the second semi-finished product, and the third semi-finished product; The fourth transport robot arm (54) is slidably disposed on a side of the fourth placement rack (52) close to the second work station rack (11), and is capable of sliding along the fourth placement rack (52) in a conveying direction toward the fourth work rack (51), and is used to transport the first semi-finished product, the second semi-finished product, and the third semi-finished product transported by the inverting trolley (12).

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