A steel bar mesh welding production line

Abstract

The present application discloses a steel bar mesh welding production line. Transfer members are rotatably arranged below the inner sides of the tops of the first station frame and the second station frame; the first welding mechanism and the second welding mechanism are arranged inside the first station frame; the third welding mechanism and the fourth welding mechanism are arranged inside the passage of the second station frame; a transfer trolley is arranged in the passage formed by the first station frame and the second station frame; and a hoisting trolley is arranged on one side of the fourth welding mechanism. In the present application, the transfer trolley runs in the passage formed by the two station frames and is responsible for transporting the semi-finished products after being welded by the first welding mechanism, the second welding mechanism and the third welding mechanism. After 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 station frame, hoists the processed workpiece, and prepares for the next processing or transportation, reducing the manual labor cost and improving the safety and stability of production at the same time.

Description

Technical Field

[0001] This application relates to the technical field of welded steel bar mesh, and particularly relates to a welded steel bar mesh production line. Background Art

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

[0003] A welded steel bar mesh is formed by welding longitudinal steel bars and transverse steel bars. The steel bar mesh row welding machine transports the steel bars into the machine in two directions, namely the radial direction and the weft direction, and the finished steel bar mesh can be obtained after welding. Currently, most steel bar mesh row welding machines can only complete the welding of the steel bar mesh step by step and cannot form a production line. Therefore, when welding the steel bar mesh, it is necessary to use a straightening machine to straighten and cut the transverse steel bar coils to a set length in advance, and the longitudinal wires need to be manually threaded, fed, and aligned. The transverse wires also need to be placed in the specified device by humans, resulting in poor connection in the production process. After welding, manual sorting of the mesh is also required, leading to high manual labor intensity and low work efficiency, making it difficult to meet the development needs of industrialization in the bridge construction industry.

[0004] Therefore, there is an urgent need for a welded steel bar mesh production line to solve the above problems. Summary of the Invention

[0005] By providing a welded steel bar mesh production line in an embodiment of this application, it aims to reduce the intensity of manual labor and improve the welding efficiency of the steel bar mesh at the same time.

[0006] To achieve the above objective, this application provides the following technical solutions:

[0007] A welded steel bar mesh production line includes a first station frame, a second station frame, a first welding mechanism, a second welding mechanism, a third welding mechanism, a fourth welding mechanism, a transfer trolley, and a hoisting trolley;

[0008] The first station frame and the second station frame are both in an inverted U-shaped structure as a whole. The first station frame and the second station frame are arranged at intervals to form a horizontal space channel. Rotating members are arranged under the inner sides of the tops of the first station frame and the second station frame;

[0009] The transfer trolley is arranged in the channel formed by the first station frame and the second station 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;

[0010] The first welding mechanism and the second welding mechanism are arranged at intervals inside the channel of the first station rack. 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;

[0011] The third welding mechanism and the fourth welding mechanism are arranged at intervals inside the channel of the second station rack. 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;

[0012] A transfer piece is used to transfer the first semi-finished product and the second semi-finished product formed by the first welding mechanism and the second welding mechanism to the transfer trolley;

[0013] Another transfer piece is used to transfer the third semi-finished product formed by the third welding mechanism and the first semi-finished product and the second semi-finished product transported by the transfer trolley to the transfer trolley;

[0014] The hoisting trolley is arranged on the side of the fourth welding mechanism away from the second station rack and is used to hoist the total finished product processed by the fourth welding mechanism.

[0015] Further, the transfer piece includes a swing arm and a grasping robot;

[0016] One end of the swing arm is fixedly arranged on the top of the first station rack and the second station rack, and the other end extends horizontally;

[0017] The grasping robot is arranged at the bottom of the swing arm. The fixed end of the grasping robot is fixedly arranged at the end of the swing arm away from the first station rack and the second station rack. The output end of the grasping robot extends downward and is used to carry 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.

[0018] Further, the first welding mechanism includes: a first working rack, a first placement rack, a plurality of first welding guns, and a first handling robotic arm;

[0019] The first working rack is arranged at intervals inside the first station rack;

[0020] 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 horizontal height as the working surface of the first working rack;

[0021] A plurality of first welding guns are slidably arranged on the first working rack. The output ends of the plurality of first welding guns are symmetrically arranged on the upper and lower sides of the first working rack; the output ends of the plurality of first welding guns correspond to the welding point positions of the first steel bar;

[0022] The first handling robotic arm is arranged on one side of the first placing rack close to the first working station rack and can slide along the first placing rack in the conveying direction of the first working rack, and is used to convey the first steel bar from the first placing rack to the first working rack.

[0023] Furthermore, a limiting component for restricting the first steel bar is arranged at the connection between the top of the first working rack and the first steel bar;

[0024] The limiting component includes a first pressing plate, a plurality of second pressing plates, a plurality of limiting plates, a plurality of guiding columns, a traveling trolley, a pressing rod and a cam;

[0025] The first pressing plate is arranged on the top of the first working rack, and the plate length direction of the first pressing plate is consistent with the conveying direction of the first steel bar;

[0026] A plurality of second pressing plates are arranged on the top of the first pressing plate and are spaced along the plate length direction of the first pressing plate. One ends of the plurality of second pressing plates are all hinged to the outside of the first pressing plate, and the other ends of them can be opened or closed with the inside of the first pressing plate, and can form a space for restricting the ends of a plurality of first steel bars;

[0027] A plurality of limiting plates are spaced along the plate length direction of the first pressing plate and are located between adjacent second pressing plates. The plate length directions of the plurality of limiting plates are all consistent with the plate width direction of the first pressing plate, and limiting grooves adapted to the first steel bar are arranged on the tops of the plurality of limiting plates;

[0028] One ends of a plurality of guiding columns vertically pass through the inner sides of the tops of the second pressing plates, and the other ends of them are fixedly connected to the bottom of the first pressing plate;

[0029] The traveling trolley is slidably arranged on the slide rail of the first working rack and is located on one side of the first pressing plate far from the end of the first steel bar, and can slide back and forth on the first working rack along the plate length direction of the first pressing plate;

[0030] One end of the pressing rod obliquely extends into the inside of the traveling trolley. A slideway is arranged on one side of the slide rail close to the second pressing plate. The end of the pressing rod extending into the traveling trolley is slidably connected to the slideway. The sliding path of the slideway is a figure-eight structure. The pressing rod can reciprocate along the figure-eight path, and during the reciprocating movement of the other end of the pressing rod, different depths of extrusion forces can be respectively generated on the second pressing plates;

[0031] The cam is rotatably arranged at one end of the pressing rod far from the traveling trolley, and a part of the peripheral surface of the cam abuts against the top plate surface of the second pressing plate, and the axis length direction of the cam is parallel to the axis length direction of the pressing rod.

[0032] 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 of it is fixedly arranged on the top of the second pressing plate.

[0033] Further, a clamping component is provided at the bottom of one side of the second pressing plate close to the limiting plate. A positioning groove for accommodating the clamping component is recessed on the plate surface of one side of the first pressing plate close to the second pressing plate. A variable-diameter groove is arranged inside the first pressing plate along its length direction. The narrow-diameter section of the variable-diameter groove communicates with the cavity of the positioning groove. A snap component is slidably arranged in the cavity of the variable-diameter groove;

[0034] When the second pressing plate approaches the first pressing plate, the clamping component can form a locking fit with the snap component; when the second pressing plate continues to approach the first pressing plate, the clamping component can form an unlocking fit with the snap component.

[0035] Further, the clamping component includes a mounting seat, a connecting column, a first limiting block, a second limiting block and two second elastic members;

[0036] The mounting seat is arranged at the bottom of one side of the second pressing plate close to the limiting plate;

[0037] The connecting column is vertically arranged on the side surface of the mounting seat close to the first pressing plate;

[0038] The first limiting block with an overall frustum structure is fixedly arranged at the end of the connecting column away from the second pressing plate, with its small-diameter surface facing away from the mounting seat. The side surface of the first limiting block abuts against the working end surface of the snap component;

[0039] The second limiting block has the same structure as the first limiting block. The second limiting block is slidably arranged on the circumference of the connecting column and is mirror-symmetric with the first limiting block along the radial direction of the connecting column. It can approach or move away from the first limiting block along the axial length direction of the connecting column. The peripheral surface of the second limiting block is arranged in continuation with the peripheral surface of the first limiting block;

[0040] The two second elastic members are symmetrically arranged on the circumference of the connecting column and are spaced from the working end of the snap component. One end of each of the two second elastic members is fixedly connected to the side surface of the second limiting block away from the first limiting block, and the other end of each is fixedly connected to the side surface of the mounting seat close to the connecting column, for resetting the second limiting block;

[0041] The snap component includes a clamping plate, a clamping block and a third elastic member;

[0042] One end of the clamping plate extends into the cavity of the wide-diameter section of the variable-diameter groove, and the other end extends into the cavity of the positioning groove, and its end surface abuts against the side surface of the first limiting block;

[0043] The clamping block is arranged at the end of the clamping plate away from the positioning groove and is slidably arranged in the cavity of the wide-diameter section of the variable-diameter groove. 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;

[0044] One end of the third elastic member is fixedly arranged on the side plate surface of the clamping block close to the clamping plate, and the other end is fixedly arranged on the corresponding surface of the wide-diameter section of the variable-diameter groove, for resetting the clamping plate.

[0045] Further, the second welding mechanism includes: a second placement rack, a second working rack, a plurality of second welding torches, and a second handling robotic arm;

[0046] The second working rack is arranged on the side of the first working rack away from the first working rack;

[0047] 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 horizontal height;

[0048] A plurality of second welding torches are slidably arranged on the second working rack. The output ends of the plurality of second welding torches are vertically symmetrically arranged on the upper and lower sides of the first working rack, and the output ends of the plurality of second welding torches are correspondingly arranged at the welding point positions of the second steel bars;

[0049] The second handling robotic arm is arranged on the side of the second placement rack close to the first working rack and can slide along the conveying direction of the second placement rack to the second working rack for conveying the second steel bars from the second placement rack to the second working rack.

[0050] Further, the third welding mechanism includes a third placement rack, a third working rack, a plurality of third welding torches, and a third handling robotic arm;

[0051] The third working rack is arranged on one side of the second working rack;

[0052] 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;

[0053] A plurality of third welding torches are slidably arranged on the third working rack. The output ends of the plurality of third welding torches are horizontally symmetrically arranged on the left and right sides of the third working rack, and the output ends of the plurality of third welding torches are correspondingly arranged at the welding point positions of the third steel bars;

[0054] The third handling robotic arm is arranged on the side of the third placement rack close to the second working rack and can slide along the conveying direction of the third placement rack to the third working rack for conveying the third steel bars from the third placement rack to the third working rack.

[0055] Further, the fourth welding mechanism includes a fourth working rack, a fourth placement rack, a plurality of fourth welding torches, and a fourth handling robotic arm;

[0056] The fourth working rack is arranged on the side of the second working rack away from the third working rack;

[0057] 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;

[0058] A plurality of fourth welding torches are slidably arranged on the fourth working frame, and the output ends of the plurality of fourth welding torches are vertically symmetrically arranged on the left and right sides of the fourth working frame, and the output ends of the plurality of fourth welding torches are correspondingly arranged at the welding points of the first semi-finished product, the second semi-finished product, and the third semi-finished product;

[0059] The fourth handling robotic arm is slidably arranged on one side of the fourth placement frame close to the second working station frame and can slide along the fourth placement frame in the conveying direction towards the fourth working frame, for handling the first semi-finished product, the second semi-finished product, and the third semi-finished product transported by the transfer cart.

[0060] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0061] In this application, the first welding mechanism welds the first steel bar, and the second welding mechanism welds the second steel bar; within the second working station 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 bar mesh, improving the production efficiency. Among them, the transfer cart runs in the channel composed of two working station frames, 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 lifting cart enters from the side of the fourth welding mechanism far from the second working station frame, hoists the processed workpiece, and prepares for the next processing or transportation, reducing the need for manual intervention, reducing the manual labor cost, and at the same time improving the safety and stability of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments of the present application or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0063] Figure 1 It is a schematic structural diagram of the general assembly provided in the embodiments of the present application;

[0064] Figure 2 It is a schematic structural diagram of the first welding mechanism provided in the embodiments of the present application;

[0065] Figure 3 It is a schematic structural diagram of the second welding mechanism provided in the embodiments of the present application;

[0066] Figure 4 It is a schematic structural diagram of the third welding mechanism provided in the embodiments of the present application;

[0067] Figure 5Schematic diagram of the fourth welding mechanism provided by the embodiment of the present application;

[0068] Figure 6 is Figure 2 Partial enlarged view of area A in;

[0069] Figure 7 Schematic diagram of the first pressing plate and the second pressing plate in the present application;

[0070] Figure 8 、 Figure 9 、 Figure 10 and Figure 11 Schematic diagrams of the locking and unlocking processes of the first pressing plate and the second pressing plate in the present application;

[0071] Figure 12 Schematic diagram of the sliding rail in the front view state in the present application.

[0072] Icons: 1 - First steel bar; 2 - Second steel bar; 3 - Third steel bar; 4 - Fourth steel bar; 10 - First working station frame; 11 - Second working station frame; 12 - Transfer trolley; 13 - Hoisting trolley; 14 - Transfer member; 141 - Swing arm; 142 - Gripping robot; 20 - First welding mechanism; 21 - First working frame; 211 - Sliding rail; 2111 - Slideway; 22 - First placing rack; 23 - First welding torch; 24 - First handling robotic arm; 25 - Limiting assembly; 251 - First pressing plate; 2511 - Positioning groove; 2512 - Reducing groove; 2513 - Clamping plate; 2514 - Clamping block; 2515 - Third elastic member; 252 - Second pressing 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 post; 255 - Walking trolley; 256 - Pressing rod; 257 - Cam; 258 - First elastic member; 30 - Second welding mechanism; 31 - Second working frame; 32 - Second placing rack; 33 - Second welding torch; 34 - Second handling robotic arm; 40 - Third welding mechanism; 41 - Third working frame; 42 - Third placing rack; 43 - Third welding torch; 44 - Third handling robotic arm; 50 - Fourth welding mechanism; 51 - Fourth working frame; 52 - Fourth placing rack; 53 - Fourth welding torch; 54 - Fourth handling robotic arm. Detailed implementation manners

[0073] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0074] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. The terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, the terms "installation", "connection", "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside 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 specific circumstances.

[0075] As Figures 1-12 shown, a steel bar mesh welding production line includes a first station rack 10, a second station rack 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 hoisting trolley 13; the first station rack 10 and the second station rack 11 are both in an inverted U-shaped structure as a whole. The first station rack 10 and the second station rack 11 are arranged at intervals to form a horizontal space channel. Rotating members 14 are rotatably provided below the inner sides of the tops of the first station rack 10 and the second station rack 11; the transfer trolley 12 is arranged in the channel formed by the first station rack 10 and the second station rack 11 and is used to transport the 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 station rack 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 station rack 11. The third welding mechanism 40 is used to weld the first steel bar 1 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; one rotating member 14 is used to transfer the first semi-finished product and the second semi-finished product welded by the first welding mechanism 20 and the second welding mechanism 30 to the transfer trolley 12; the other rotating member 14 is used to transfer the third semi-finished product welded 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 the side of the fourth welding mechanism 50 away from the second station rack 11 and is used to hoist the total finished product processed by the fourth welding mechanism 50.

[0076] In the above solution, inside the first station rack 10, the first welding mechanism 20 welds the first steel bars 1 to form a first semi-finished product, and the second welding mechanism 30 welds the second steel bars 2 to form a second semi-finished product; inside the second station rack 11, the third welding mechanism 40 welds the third steel bars 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 total finished steel bar mesh. After the fourth welding mechanism 50 completes the welding work of the total finished steel bar mesh, the hoisting trolley 13 enters from the side of the fourth welding mechanism 50 away from the second station rack 11, hoists the total finished steel bar mesh, and prepares for the next processing or transportation, reducing the need for manual intervention, lowering the manual labor cost, and at the same time improving the safety and stability of production.

[0077] The steel bar mesh welding production line provided by the present application transports semi-finished products to the welding mechanisms inside the first station rack 10 and the second station rack 11 respectively through two transfer parts 14. The transfer trolley 12 moves in the channel formed by the first station rack 10 and the second station rack 11 and is responsible for transporting 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. Among them, one transfer part 14 transports the first semi-finished product and the second semi-finished product formed by the first welding mechanism 20 and the second welding mechanism 30 to the transfer trolley 12; the other transfer part 14 transports the third semi-finished product formed by the third welding mechanism 40, as well as the first semi-finished product and the second semi-finished product transported by the transfer trolley 12 to the transfer trolley 12, making the processes of steel bar conveying, welding, and finished product transportation smoother and more efficient.

[0078] The transfer part 14 includes a swing arm 141 and a gripping robot 142; one end of the swing arm 141 is fixedly arranged at the top of the first station rack 10 and the second station rack 11, and its other end extends horizontally; the gripping robot 142 is arranged at the bottom of the swing arm 141, the fixed end of the gripping robot 142 is fixedly arranged at the end of the swing arm 141 away from the first station rack 10 and the second station rack 11, and the output end of the gripping robot 142 extends downward 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.

[0079] In the above solution, one end of the swing arm 141 is fixedly arranged at the tops of the first working station frame 10 and the second working station frame 11, and the other end extends horizontally, enabling the swing arm 141 to swing between the two working stations, thereby covering the working areas of the first working station frame 10 and the second working station frame 11. The horizontal extension design of the swing arm 141 allows the steel bars to move smoothly between the two working stations, avoiding potential safety hazards caused by manual operation. The gripping robot 142 can precisely control the position and movement path of the steel bars through its control system. When it is necessary to transfer semi-finished products, the gripping 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 gripping is completed, the swing arm 141 starts to swing, placing the corresponding first semi-finished product, second semi-finished product, and third semi-finished product on the transfer trolley 12 or the external semi-finished product placement area, making the transfer process of the first semi-finished product, second semi-finished product, and third semi-finished product more automated and efficient. When the first semi-finished product, second semi-finished product, and third semi-finished product reach the target working station on the transfer trolley 12 or the external semi-finished product placement area, the gripping robot 142 releases the corresponding semi-finished product through the clamping device at its output end. After the release is completed, the gripping robot 142 returns to its initial position, preparing for the next gripping and transfer, shortening the production cycle of the steel bar mesh.

[0080] Implementably, one ends of the two swing arms 141 close to the first working station frame 10 and the second working station frame 11 can reciprocally slide along the span direction of the first working station frame 10 and the second working station frame 11. Preferably, slide frames can be arranged on the tops of one ends of the two swing arms 141 close to the first working station frame 10 and the second working station frame 11. The two slide frames are slidably arranged on the tops of the first working station frame 10 and the second working station frame 11 respectively, and can drive the two swing arms 141 to reciprocally slide along the span direction of the corresponding first working station frame 10 and the second working station frame 11.

[0081] The first welding mechanism 20 includes: a first working frame 21, a first placement frame 22, a plurality of first welding torches 23, and a first handling robotic arm 24; the first working frame 21 is arranged at intervals inside the first working 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 and the working surface of the first working frame 21 are at the same horizontal height; the plurality of first welding torches 23 are slidably arranged on the first working frame 21, and the output ends of the plurality of first welding torches 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 torches 23 correspond to the welding point positions of the first steel bar 1; the first handling robotic arm 24 is arranged on the side of the first placement frame 22 close to the first working station frame 10 and can slide along the conveying direction of the first placement frame 22 towards the first working frame 21 for conveying the first steel bar 1 from the first placement frame 22 to the first working frame 21.

[0082] In the above solution, the first working frame 21 is spaced inside the first working station frame 10, providing a stable working platform. The first placing frame 22 is arranged on one side of the first working frame 21, and its placing surface is at the same horizontal height as the working surface of the first working frame 21, facilitating the smooth transition of the steel bars. A plurality of first welding torches 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 torches 23 correspond to the welding point positions of the second steel bar 2, ensuring that the first welding torch 23 can accurately locate the points on the first steel bar 1 that need to be welded, thereby reducing human errors during the welding process of the first steel bar 1 and improving the quality of the first semi-finished product formed after welding the first steel bar 1.

[0083] At the connection between the top of the first working frame 21 and the first steel bar 1, a limiting component 25 for restricting the first steel bar 1 is provided; the limiting component 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 traveling 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 length direction of the first pressing plate 251 is consistent with the conveying direction of the first steel bar 1; the plurality of second pressing plates 252 are arranged on the top of the first pressing plate 251 and are spaced along the length direction of the first pressing plate 251. One ends of the plurality of second pressing plates 252 are hinged to the outside of the first pressing plate 251, and the other ends of them can be opened or closed with the inside of the first pressing plate 251, and a space for restricting the ends of the plurality of first steel bars 1 can be formed; the plurality of limiting plates 253 are spaced along the length direction of the first pressing plate 251 and are located between adjacent second pressing plates 252. The length directions of the plurality of limiting plates 253 are all consistent with the width direction of the first pressing plate 251, and limiting grooves 2531 adapted to the first steel bar 1 are arranged on the tops of the plurality of limiting plates 253; one ends of the plurality of guide columns 254 vertically pass through the inner sides of the tops of the second pressing plates 252, and the other ends of them are fixedly connected to the bottom of the first pressing plate 251; the traveling 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 reciprocally slide on the first working frame 21 along the length direction of the first pressing plate 251; one end of the pressing rod 256 obliquely extends into the inside of the traveling trolley 255. A slideway 2111 is provided on the side of the slide rail 211 close to the second pressing plate 252. The end of the pressing rod 256 extending into the traveling trolley 255 is slidably connected to the slideway 2111. The sliding path of the slideway 2111 is a figure-eight structure. The pressing rod 256 can reciprocate along the figure-eight path, and during the reciprocating movement of the other end of the pressing rod 256, different depths of extrusion forces can be respectively generated on the second pressing plates 252; the cam 257 is rotatably arranged at the end of the pressing rod 256 away from the traveling trolley 255, and a part of the peripheral surface of the cam 257 abuts against the top plate surface of the second pressing plate 252, and the axial length direction of the cam 257 is parallel to the axial length direction of the pressing rod 256.

[0084] In the above solution, the first pressing plate 251 is fixed to the top of the first working frame 21, and the length direction of its plate is consistent with the conveying direction of the first handling robotic arm 24, providing an installation basis for the second pressing plate 252 and the limiting plate 253. The second pressing plates 252 are arranged at intervals along the length direction of the first pressing plate 251 and are connected to the first pressing plate 251 in a hinged manner, and can be opened or closed to form a space for restricting the end of the first steel bar 1. The guiding columns 254 vertically pass through the second pressing plates 252 and are fixed to the bottom of the first pressing plate 251, providing support and guidance for the opening and closing of the second pressing plates 252. The limiting plates 253 are located between adjacent second pressing plates 252, and limiting grooves 2531 adapted to the first steel bar 1 are provided at the top for fixing the position of the first steel bar 1. The guiding columns 254 vertically pass through the second pressing plates 252 and are fixed to the bottom of the first pressing plate 251, providing support and guidance for the opening and closing of the second pressing plates 252. The slide rails 211 are arranged on the top of the first working frame 21 and are spaced from the second pressing plates 252 to prevent the second pressing plates 252 from interfering with the displacement of the walking trolley 255. When the walking trolley 255 displaces, the slideway 2111 with a figure-eight structure can restrict the telescopic movement of the pressure rod 256 slidably arranged inside the walking trolley 255, so that the cam 257 at the end of the pressure rod 256 away from the walking trolley 255 approaches or moves away from the top end face of the second pressing plate 252.

[0085] When the first handling robotic arm 24 conveys the first steel bar 1 onto the first working 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 working frame 21 in the length direction of the first pressing plate 251. During the sliding process of the walking trolley 255, the cam 257 at the end of the pressure rod 256 is driven to rotate. During the rotation of the cam 257, due to the change in the curvature of its contour, when the lowest point of the curvature of the cam 257 changes to the highest point of the curvature, the circumferential surface of the cam 257 continuously presses the top end face 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 clamped with the first pressing plate 251, contacts the end of the first steel bar 1 and forms a constraint. The limiting grooves 2531 on the limiting plates 253 are adapted to the first steel bar 1 to restrict 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 constraint and release of the first steel bar 1 are realized, reducing manual intervention and reducing the labor intensity of the staff.

[0086] Implementably, the end face of the second pressing plate 252 in contact with 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.

[0087] It should be noted that when the walking trolley 255 makes a forward movement, the end of the pressing rod 256 located inside the walking trolley 255 slides on the path on the side of the slideway 2111 away from the first working frame 21, so that the other end of the pressing rod 256 first presses against the top surface of the second pressing plate 252, and the second pressing plate 252 and the first pressing plate 251 are first squeezed; when the walking trolley 255 makes a return movement, the end of the pressing rod 256 located inside the walking trolley 255 slides on the path on the side of the slideway 2111 close to the first working frame 21, so that the other end of the pressing rod 256 presses against the top surface of the second pressing plate 252 again, making the depth of the second pressing plate 252 pressed again larger, and the second pressing plate 252 and the first pressing plate 251 are squeezed again.

[0088] During the welding process, the limiting component 25 ensures the stable contact between the first steel bar 1 and the first working frame 21, facilitating the precise welding by the welding torch. After welding is completed, the walking trolley 255 slides in the reverse direction, driving the cam 257 to rotate in the reverse direction, so that the second pressing plate 252 opens. The walking trolley 255 moves to reach the initial position again, ready to receive the next batch of steel bars. Through the second pressing plate 252 and the limiting plate 253, the first steel bar 1 is accurately positioned and constrained, reducing the displacement and shaking of the first steel bar 1 during the welding process and improving the welding accuracy.

[0089] 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 is fixed to the bottom of the first pressing plate 251, and the other end is fixedly arranged on the top of the second pressing plate 252.

[0090] In the above solution, when the first pressing plate 251 and the second pressing plate 252 are in the unconnected state, the first elastic member 258 is in the uncompressed state. When the two start to be connected, that is, the arcs of the first pressing plate 251 and the second pressing plate 252 gradually decrease, the first elastic member 258 starts 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 and the first pressing plate 251 to separate from each other, thereby realizing the automatic unlocking of the first pressing plate 251 and the second pressing plate 252.

[0091] A clamping component is arranged at the bottom of the side of the second pressing plate 252 close to the limiting plate 253. A positioning groove 2511 for accommodating the clamping component is recessed on the side plate surface of the first pressing plate 251 close to the second pressing plate 252. A variable-diameter groove 2512 is arranged inside the first pressing plate 251 along its length direction. The narrow-diameter section of the variable-diameter groove 2512 communicates with the cavity of the positioning groove 2511. A buckle component is slidably arranged in the cavity of the variable-diameter groove 2512; when the second pressing plate 252 approaches the first pressing plate 251, the clamping component can form a locking fit with the buckle component; when the second pressing plate 252 continues to approach the first pressing plate 251, the clamping component can form an unlocking fit with the buckle component.

[0092] The snap - fit component includes a mounting base 2521, a connecting column 2522, a first limiting block 2523, a second limiting block 2524 and two second elastic members 2525; the mounting base 2521 is arranged at the bottom of the second pressing plate 252 close to the limiting plate 253; the connecting column 2522 is vertically arranged on the side surface of the mounting base 2521 close to the first pressing plate 251; the first limiting block 2523 with an overall frustum - shaped structure is fixedly arranged at one end of the connecting column 2522 away from the second pressing plate 252, its small - diameter surface faces away from the mounting base 2521, and the side surface of the first limiting block 2523 abuts against the working end surface of the snap - buckle component; the second limiting block 2524 has the same structure as the first limiting block 2523, the second limiting block 2524 is slidably arranged on the periphery of the connecting column 2522, and is mirror - symmetrically arranged with the first limiting block 2523 along the radial direction of the connecting column 2522, and can approach or move away from the first limiting block 2523 along the axial length direction of the connecting column 2522, and the peripheral surface of the second limiting block 2524 is arranged in continuation with the peripheral surface of the first limiting block 2523; the two second elastic members 2525 are symmetrically arranged on the periphery of the connecting column 2522, and are spaced from the working end of the snap - buckle component. One end of each of the two second elastic members 2525 is fixedly connected to the side surface of the second limiting block 2524 away from the first limiting block 2523, and the other end of each is fixedly connected to the side surface of the mounting base 2521 close to the connecting column 2522, and is used for resetting the second limiting block 2524.

[0093] The snap - buckle component includes a clamping plate 2513, a clamping block 2514 and a third elastic member 2515; one end of the clamping plate 2513 extends into the cavity of the wide - diameter section of the variable - diameter groove 2512, and the other end extends into the 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 cavity of the wide - diameter section of the variable - diameter groove 2512, and the longitudinal cross - sectional area of the clamping 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 the side plate surface of the clamping block 2514 close to the clamping plate 2513, and the other end is fixedly arranged on the corresponding surface of the wide - diameter section of the variable - diameter groove 2512, and is used for resetting the clamping plate 2513.

[0094] As Figures 8-12As shown in the figure, in the above solution, in the initial state, the mounting base 2521 is fixed on the second pressing plate 252, the connecting column 2522 vertically protrudes, the first limiting block 2523 is fixed at the top end of the connecting column 2522, and the small-diameter surface faces away from the mounting base 2521. The second limiting block 2524 is slidably arranged around the connecting column 2522. Due to the deformation constraint of the second elastic member 2525, the second limiting block 2524 and the first limiting block 2523 maintain a certain distance initially. One end of the clamping plate 2513 extends into the wide-diameter section of the variable-diameter groove 2512, the other end enters the positioning groove 2511, and its end face maintains a certain gap or slightly contacts 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 slides within the wide-diameter section of the variable-diameter groove 2512. One end of the third elastic member 2515 is connected to the clamping block 2514, and the other end is fixed on the corresponding surface of the wide-diameter section of the variable-diameter groove 2512, providing a restoring force for the clamping plate 2513.

[0095] Locking process: When the first pressing plate 251 and the second pressing plate 252 are in the fully open state and the traveling trolley 255 makes a forward displacement, the end of the pressing rod 256 located inside the traveling trolley 255 slides on the path of the slideway 2111 on the side away from the first working frame 21, causing the cam 257 to continuously press against the top surface of the second pressing plate 252, forcing the second pressing plate 252 to continuously move closer to the first pressing plate 251. When the second pressing plate 252 moves closer to and contacts the first pressing plate 251, the first limiting block 2523 first enters the positioning groove 2511 and contacts the end face of the clamping plate 2513. As the second pressing plate 252 continues to move, the circumferential surface of the first limiting block 2523 forces the clamping plate 2513 and the clamping block 2514 thereon to move towards the wide-diameter section in the variable-diameter 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 on the side of the first limiting block 2523 close to the mounting base 2521, 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 an uncompressed state, and the third elastic member 2515 is in a stretched state, providing the necessary restoring force for unlocking.

[0096] Unlocking process: When the traveling trolley 255 makes a return movement, the end of the pressing rod 256 located inside the traveling trolley 255 slides on the path of the slideway 2111 on the side close to the first working frame 21, causing the other end of the pressing rod 256 to press against the top surface of the second pressing plate 252 again. The cam 257 at the end of the pressing rod 256 presses each second pressing plate 252 again, and the second pressing plate 252 moves towards the bottom of the positioning groove 2511.

[0097] During this process, the end face of the clamping plate 2513 away from the first limiting block 2523 will continue to press against the end face of the second limiting block 2524 close to the first limiting block 2523, driving the second limiting block 2524 along the axial length direction of the connecting column 2522 towards the side close to the mounting seat 2521 and initially compressing the second elastic member 2525 until the end face of the clamping plate 2513 away from the first limiting block 2523 abuts against the end face of the second limiting block 2524 close to the mounting seat 2521. At this time, the second elastic member 2525 returns to its initial state. Due to the tendency of the first elastic member 258 to be released, the circumferential surface of the second limiting block 2524 continuously presses against the end face of the clamping plate 2513 close to the first limiting block 2523. At this time, the second elastic member 2525 is in a stretched state.

[0098] When the clamping plate 2513 gradually moves to the edge of the circumferential surface of the second limiting block 2524, the deformation of the second elastic member 2525 causes the second limiting block 2524 to tend to move closer to the mounting seat 2521. When the clamping plate 2513 completely moves to the edge of the circumferential surface of the second limiting block 2524, at this time, the pressing rod 256 leaves the top surface of the current second pressing plate 252, causing the second pressing plate 252 to lose the pressing force of the pressing rod 256. Due to the instantaneous force generated during the release of the first elastic member 258, the tendency of the second pressing plate 252 and the first pressing plate 251 to be about to separate is intensified. Through the clamping of the circumferential surface of the second limiting block 2524 by the clamping plate 2513, the second limiting block 2524 and the clamping plate 2513 as a whole slide relative to the connecting column 2522 and move towards the direction of the first limiting block 2523, causing the second limiting block 2524 to contact the first limiting block 2523. Subsequently, due to the continuous release of the first elastic member 258, the clamping plate 2513 can smoothly slip off from the outside of the second limiting block 2524 and the first limiting block 2523, and finally the first pressing plate 251 and the second pressing plate 252 are opened, and the clamping plate 2513 returns to its initial state due to the deformation of the third elastic member 2515.

[0099] In this application, by pressing the second pressing plate 252, the quick insertion and extraction, locking and unlocking of the clamping component and the buckling component can be realized. The operation is simple and fast, and by adjusting parameters such as the inclined plane angles of the first limiting block 2523 and the second limiting block 2524, the size of the clamping block 2514, and the elastic forces of the first elastic member 258, the second elastic member 2525, and the third elastic member 2515, different insertion and extraction forces and locking force requirements can be adapted, improving the adaptability and flexibility of the structure. The pressing type insertion and extraction structure makes the connecting piece between the first pressing plate 251 and the second pressing plate 252 easy to disassemble and replace, facilitating maintenance and repair.

[0100] Implementable. Soft pads are provided on the inner sides of the second pressing plate 252 and the first pressing plate 251. The circumferential surface of the soft pad abuts against the circumferential surface of the steel bar, so that there is no rigid contact with the steel bar during the clamping and extrusion process between the first pressing plate 251 and the second pressing plate 252.

[0101] The second welding mechanism 30 includes: a second placement rack 32, a second working rack 31, a plurality of second welding torches 33 and a second handling robotic arm 34; the second working rack 31 is arranged on one side of the first working 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 torches 33 are slidably arranged on the second working rack 31, and the output ends of the plurality of second welding torches 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 torches 33 are correspondingly arranged at the welding point positions of the second steel bars 2; the second handling robotic arm 34 is arranged on one 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 towards the second working rack 31 for conveying the second steel bars 2 from the second placement rack 32 to the second working rack 31.

[0102] In the above solution, before starting welding, the second steel bars 2 are placed on the second placement rack 32. When welding is required, the second handling robotic arm 34 grabs a steel bar and precisely places it at a predetermined position on the second working rack 31. Subsequently, the plurality of second welding torches 33 start working and weld the steel bar simultaneously from the upper and lower directions. After welding is completed, the second handling robotic arm 34 may move the welded steel bar out of the working area to prepare for the next round of welding work of the second steel bars 2. By using a plurality of second welding torches 33 to weld simultaneously from the upper and lower directions, the welding time is shortened and the production efficiency is improved. The output ends of the second welding torches 33 are precisely aligned with the welding point positions, reducing welding defects and improving welding quality. Moreover, the output ends of the second welding torches 33 welding from the upper and lower directions can also provide better welding strength and uniformity. The use of the second handling robotic arm 34 reduces the need for manual operation and improves the automation degree of the entire welding process.

[0103] The third welding mechanism 40 includes a third placement rack 42, a third working rack 41, a plurality of third welding torches 43, and a third handling robotic arm 44; the third working rack 41 is disposed on one side of the second working rack 11; the third placement rack 42 is disposed 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; the plurality of third welding torches 43 are slidably disposed on the third working rack 41, the output ends of the plurality of third welding torches 43 are symmetrically disposed horizontally on the left and right sides of the third working rack 41, and the output ends of the plurality of third welding torches 43 are correspondingly disposed at the welding point positions of the third steel bars 3; the third handling robotic arm 44 is disposed on the side of the third placement rack 42 close to the second working rack 11 and can slide along the third placement rack 42 in the conveying direction towards the third working rack 41 for conveying the third steel bars 3 from the third placement rack 42 to the third working rack 41.

[0104] In the above solution, before welding starts, the third steel bars 3 are neatly placed on the third placement rack 42. When welding is required, the third handling robotic arm 44 grabs a steel bar according to a preset program and precisely places it at a predetermined position on the third working rack 41. Subsequently, the plurality of third welding torches 43 start working, and the output ends of the plurality of third welding torches 43 weld the steel bar simultaneously from the left and right directions. After welding is completed, the handling robotic arm may move the welded steel bar out of the working area to prepare for the next round of welding of the third steel bars 3. By using a plurality of third welding torches 43 to weld simultaneously from the left and right directions, the welding cycle of the third steel bars 3 is shortened. The output ends of the third welding torches 43 are precisely aligned with the welding point positions, reducing welding defects and improving the strength and reliability of the welded joints. Welding from the left and right directions by the output ends of the third welding torches 43 can also provide better welding uniformity and appearance quality. The use of the third handling robotic arm 44 reduces the need for manual operation and improves the automation level of the entire welding process. Both the third welding torches 43 and the third handling robotic arm 44 can 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.

[0105] The fourth welding mechanism 50 includes a fourth working frame 51, a fourth placement frame 52, a plurality of fourth welding torches 53, and a fourth handling robotic arm 54; the fourth working frame 51 is disposed on a side of the second working station frame 11 away from the third working frame 41; the fourth placement frame 52 is disposed on one side of the fourth working frame 51, and the placement surface of the fourth placement frame 52 and the working surface of the fourth working frame 51 are at the same horizontal height; a plurality of fourth welding torches 53 are slidably disposed on the fourth working frame 51, the output ends of the plurality of fourth welding torches 53 are symmetrically disposed vertically on the left and right sides of the fourth working frame 51, and the output ends of the plurality of fourth welding torches 53 are correspondingly disposed at the solder joint positions of the first semi-finished product, the second semi-finished product, and the third semi-finished product; the fourth handling robotic arm 54 is slidably disposed on a side of the fourth placement frame 52 close to the second working station frame 11 and can slide along the fourth placement frame 52 in the conveying direction towards the fourth working frame 51 for handling the first semi-finished product, the second semi-finished product, and the third semi-finished product transported by the transfer trolley 12.

[0106] In the above solution, before welding starts, the solder joint 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 frame 52 by the fourth handling robotic arm 54. When welding is required, the fourth handling robotic arm 54 places the first semi-finished product, the second semi-finished product, and the third semi-finished product according to a preset program and accurately places them at predetermined positions on the fourth working frame 51. Subsequently, the plurality of fourth welding torches 53 start to work, and the output ends of the fourth welding torches 53 simultaneously weld each semi-finished product from the vertical directions on the left and right sides. After welding is completed, the fourth handling robotic arm 54 removes the welded total finished product from the fourth working frame 51, obtains the total finished product of the steel bar mesh, and conveys it to the hoisting trolley 13 to prepare for the next round of welding or hoisting operations. In this application, by using a plurality of fourth welding torches 53 to simultaneously weld from the vertical directions on the left and right sides, the welding time is shortened. The output ends of the fourth welding torches 53 are accurately aligned with the solder joint positions, which helps to reduce welding defects and improve the strength and reliability of the welded joints. Both the fourth welding torches 53 and the fourth handling robotic arm 54 can move along their respective tracks, enabling the entire fourth welding mechanism 50 to flexibly adapt to the welding requirements of steel bars of different sizes and shapes.

[0107] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, reference can be made to each other. The key points described in each embodiment are the differences from other embodiments.

[0108] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting the present application; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions 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 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; 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 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 used to transport the first steel bar (1) from the first placement rack (22) to the first working rack (21), and can slide along the transport direction from the first placement rack (22) to the first working rack (21); 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 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 pressing 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 squeezing forces of different depths on the second pressing plate (252) during the reciprocating motion; The cam (257) is rotatably arranged at one end of the pressure rod (256) away from the walking 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); 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.

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 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 welding point positions of the first steel bars (1).

4. The steel mesh welding production line according to claim 1, characterized in that: 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).

5. The steel mesh welding production line according to claim 1, 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 1, 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).

7. The steel mesh welding production line according to claim 1, 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).

8. The steel mesh welding production line according to claim 3, 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).

9. The steel mesh welding production line according to claim 8, 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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