An automated welding production line for K-node connection plates

Abstract

The present invention provides an automated welding production line for K-node connection plates, which uses the connection plate body to improve the strength of the K-node, and includes a frame, a pre-assembly module, a welding module, a stress relief module and a circulation module; a conveying device is arranged on the frame, and the pre-assembly module, the welding module and the stress relief module are sequentially arranged on the frame, and the circulation module is arranged at both ends of the frame; the pre-assembly module positions and places the connection plate body and the reinforcement, and performs bending and pre-welding; the welding module completely welds the connection plate body and the reinforcement conveyed by the pre-assembly module; the stress relief module performs stress relief treatment on the connection plate body and the reinforcement conveyed by the welding module; there are two sets of circulation modules, which are respectively located at both ends of the frame, and the circulation module maintains the movement and switching between the pre-assembly module, the welding module and the stress relief module.

Description

Technical Field

[0001] The present invention relates to the field of welding equipment, and particularly to an automated welding production line for K-joint connecting plates. Background Art

[0002] In modern industry, welding, as an important connection technology, is widely used in various fields. During the erection and installation of cathead towers, the K-joints of the boom components in the tower head part are prone to deformation under the influence of factors such as tower type structure, electrical load, wind force, and temperature. It is necessary to increase the strength by welding the connecting plate body parts. And during the welding process, due to the rapid non-equilibrium heating and cooling, the connecting plate body will inevitably produce non-negligible deformation, resulting in difficult installation.

[0003] A Chinese invention with the publication number CN116604235A discloses a welding device that can reduce welding deformation. It includes a welding anti-deformation device that can perform anti-deformation on at least one workpiece to be welded. The workpiece to be welded has a middle part and two side parts. The welding anti-deformation device includes a support assembly, at least one set of bending members, and at least one set of belt moving components. The support assembly includes a support main body and at least one side support member. Each side support member has an arc surface. The arc surface formed by the side support members is arranged to contact the lower bottom surface of the workpiece to be welded. The side support member has a high end part and two low end parts lower than the high end part. One set of bending members is provided with two, and the two bending members are respectively slidably installed on the support main body. Each bending member includes a pressing assembly and a driving member. The pressing assembly includes a mounting part and a movable pressing member. The movable pressing member has a pressing part. The driving member is used to drive the pressing part formed by the movable pressing member to approach or move away from the upper surface of the side part above the low end part.

[0004] However, the following deficiencies exist in this technical solution: There are also factors such as the rapid change of the workpiece temperature, different welding processes, and the elimination of welding stress that affect welding deformation. It has certain limitations to only reduce welding deformation by the amount of anti-deformation in this invention. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies of the prior art by providing a K-joint connecting plate. A reinforcing member is provided at the opening of the K shape to enhance the strength of the connecting plate body. At the same time, a new welding forming method is used to improve the dimensional accuracy of the connecting plate after welding, improve the strength and connection accuracy after the connecting plate is installed, thereby improving the tower head strength of the cathead tower and ensuring the normal operation of the iron tower under extreme weather conditions.

[0006] To achieve the above object, the present invention provides the following technical solution: a K-node connecting plate, including a connecting plate body, an upper bent arm and a lower bent arm, the upper bent arm and the lower bent arm are fixedly connected in a K shape by fasteners, and a plurality of mounting holes are provided on the connecting plate body, and the distribution of the mounting holes is matched with the mounting positions of the upper bent arm and the lower bent arm; the short sides of the side surface of the connecting plate body are perpendicular to the braces of the upper bent arm and the lower bent arm respectively.

[0007] As a preference, a reinforcing member is welded on the connecting plate body, and the reinforcing member is located at the central opening of the K shape formed by the connection of the upper bent arm and the lower bent arm; after the reinforcing member is welded on the connecting plate body, the flatness of the connecting plate body is not greater than 4 mm.

[0008] Another object of the present invention is to provide an automatic welding production line for a K-node connecting plate in view of the deficiencies of the prior art. By setting a preloading module, a welding module and a stress relieving module to act together to reduce welding deformation, so that the position of the mounting holes of the connecting plate body can be kept within the tolerance range after welding, which is convenient for the installation of the connecting plate body. At the same time, a circulation module is set to improve the processing and production efficiency.

[0009] An automatic welding production line for a K-node connecting plate includes a frame, a preloading module, a welding module, a stress relieving module and a circulation module; a conveying device is provided on the frame, and the preloading module, the welding module and the stress relieving module are sequentially arranged on the frame, and the circulation module is arranged at both ends of the frame; the preloading module positions and places the connecting plate body and the reinforcing member and performs bending and pre-welding; the welding module completely welds the connecting plate body and the reinforcing member conveyed by the preloading module; the stress relieving module performs stress relieving treatment on the connecting plate body and the reinforcing member conveyed by the welding module; two sets of circulation modules are provided, which are respectively located at both ends of the frame, and the circulation module maintains the movement and switching between the preloading module, the welding module and the stress relieving module.

[0010] As a preference, the preloading module includes a cylinder, an upper die, a lower die, a pre-welding mechanism and a cushion block; the top of the cylinder is fixed to the upper part of the frame, and the push rod of the cylinder is connected to the top of the upper die; the bottom of the upper die is bent downward, a positioning groove is provided in the middle of the upper die, the positioning groove is parallel to the long side direction of the upper die, and mounting grooves are symmetrically provided on both sides of the middle of the positioning groove; the lower die is arranged on the conveying device to carry the connecting plate body and is driven along with the conveying device; the pre-welding mechanism includes a wire feeder and a welding torch, the wire feeder is arranged on the top of the upper die, and two sets of welding torches are provided, which are respectively located in the mounting grooves; the cushion block is installed on the frame, and the cushion block is located below the mounting groove.

[0011] As a preference, the lower die includes a first lower die and a second lower die, and a rotating shaft is hinged in the middle of the first lower die and the second lower die; a support rod is hinged at the opposite end of the hinged part of the first lower die, and a pressing rod is hinged on the support rod; a positioning block is arranged on the second lower die.

[0012] As a preference, the welding module includes an automatic welding mechanism and a finishing mechanism; there are two groups of the automatic welding mechanisms, which are fixed on both sides of the frame; the finishing mechanism is arranged on the top of the two groups of the automatic welding mechanisms;

[0013] As a preference, the automatic welding mechanism includes a mounting frame, a driver, a double-headed lead screw, a welding nozzle and a preheating nozzle; the bottom of the mounting frame is fixed on the frame; the driver is installed on one side of the mounting frame, and the output shaft of the driver is coaxially and fixedly connected to the double-headed lead screw, and the double-headed lead screw rotates synchronously with the output shaft of the driver; the welding nozzle and the preheating nozzle are integrally arranged and are jointly slidably arranged on the double-headed lead screw, and there are two groups of the welding nozzle and the preheating nozzle symmetrically arranged on the double-headed lead screw and the preheating nozzle is close to the end of the double-headed lead screw.

[0014] As a preference, the stress relieving module includes a pressing block, a knocking block, a sliding mechanism and an annealing box; the pressing block includes an upper plate, a connecting rod, a pressing plate and a contact block, the upper plate is fixed on the frame, a plurality of counterbores are opened at the top of the upper plate, the connecting rod is suspended at the bottom of the upper plate corresponding to the counterbores, a spring is sleeved on the connecting rod, the lower end of the connecting rod is fixedly connected with the pressing plate, and a plurality of the contact blocks are arranged at the bottom of the pressing plate; a roller is rotatably arranged at the bottom of the contact block; the difference between the knocking block and the pressing block is that convex blocks extend downward at both ends of the pressing plate on the knocking block; there are two groups of the sliding mechanisms symmetrically arranged, the sliding mechanism includes a slide rail and two groups of sliders, the slide rail is fixedly arranged on the frame, the slide rail is directly below the convex block, and the sliders are slidably arranged on the slide rail; the annealing box covers the tail end of the frame.

[0015] As a preference, the circulation module includes a base, a top cylinder, a loading platform and a pushing cylinder; the base is arranged at one end of the frame, and the top cylinder is arranged on the base; the loading platform is fixedly connected to the top push rod of the top cylinder; the pushing cylinder is horizontally arranged on the base, and the moving direction of the push rod of the pushing cylinder when it extends is towards the frame.

[0016] As an optimization, stopping mechanisms are symmetrically arranged on both sides at the output ends of the welding module and the stress relieving module. The stopping mechanism includes a sensor, a stopping cylinder, and a stopping push rod. The sensor is installed on the frame on one side of the conveying device. The stopping cylinder is arranged on the frame on the same side as the sensor, and a stopping push rod is arranged on the stopping cylinder.

[0017] The beneficial effects of the present invention are as follows:

[0018] (1) In the present invention, the connecting plate body is fixed between the upper and lower arms through fasteners, and the distribution of the mounting holes is in imitation of the two, which is convenient for installation and fixation. A reinforcing member is welded on the connecting plate body, and it is located at the central opening of the K shape, further improving the strength of the connecting plate body.

[0019] (2) By setting a pre-installation module in the present invention, the reinforcing member can be quickly positioned at the position where the connecting plate body needs to be welded, and then the connecting plate body and the reinforcing member are subjected to reverse pre-deformation together through the extrusion cooperation of the upper die and the lower die to offset the welding deformation. At the same time, the reinforcing member also fits the connecting plate body better, reducing the weld seam, improving the quality after welding, reducing dimensional deformation, and enhancing the installation efficiency.

[0020] (3) By setting a welding module in the present invention, before welding the reinforcing member and the connecting plate body, the connecting plate body and the reinforcing member are preheated with a preheating nozzle to reduce the temperature change gradient during welding, further reducing the deformation generated during welding. The double-headed lead screw rotates to make the two groups of welding nozzles move from the middle of the lead screw to both ends, and the connecting plate body is welded from the middle to both ends, so that the heat diffuses evenly to both ends, and the stress concentration phenomenon is also reduced, ensuring the consistency of the weld quality and improving the performance after welding.

[0021] (4) By setting a stress relieving module in the present invention, the welded connecting plate body and the reinforcing member are knocked with a knocking block, and the knocking action is carried out sequentially from the middle to both ends, promoting the uniform release of the residual stress, reducing the welding deformation. During the knocking process, the strength and toughness of the weld seam can also be improved, and the mechanical properties of the connecting plate body are enhanced; the annealing box controls the appropriate temperature and holding time to further eliminate the residual stress and effectively control the bending deformation.

[0022] (5) By setting a circulation module in the present invention, the position of the lower die moving on the conveying device is switched, reducing the time and energy of manual handling, avoiding the situation of untimely connection with the pre-installation module, improving the degree of automation, and thus enhancing the efficiency of welding production.

[0023] In summary, the present invention has the advantages of high strength, high welding quality, small welding deformation, high degree of automation, high production efficiency, etc. Description of the Drawings

[0024] Figure 1 Schematic diagram of the connecting plate structure for the K node

[0025] Figure 2 is Figure 1 Schematic diagram of the structure at location A in

[0026] Figure 3 Schematic diagram of the automated welding production line structure

[0027] Figure 4 Partial schematic diagram of the present invention

[0028] Figure 5 Partial schematic diagram of the present invention

[0029] Figure 6 Partial schematic diagram of the present invention

[0030] Figure 7 Partial schematic diagram of the present invention

[0031] Figure 8 Partial schematic diagram of the present invention

[0032] Figure 9 Partial schematic diagram of the present invention

[0033] Figure 10 Partial schematic diagram of the present invention

[0034] Figure 11 Partial schematic diagram of the present invention

[0035] Figure 12 is Figure 11 Enlarged view of location B in

[0036] Figure 13 Partial schematic diagram of the present invention

[0037] Description of the Drawings: 1. Frame; 11. Conveyor device; 12. Guide block; 13. Auxiliary support plate; 14. Auxiliary cylinder; 2. Pre-assembly module; 21. Cylinder; 22. Upper die; 221. Positioning groove; 222. Installation groove; 23. Lower die; 231. First lower die; 232. Second lower die; 233. Rotating shaft; 234. Support rod; 235. Pressing rod; 236. Positioning block; 24. Pre-welding mechanism; 241. Wire feeder; 242. Welding torch; 3. Welding module; 31. Automatic welding mechanism; 32. Arranging mechanism; 311. Mounting frame; 312. Driver; 313. Double-headed lead screw; 314. Welding nozzle; 315. Preheating nozzle; 321. Arranging cylinder; 322. Clamping plate; 4. Stress-relieving module; 41. Pressing block; 411. Upper plate; 412. Connecting rod; 413. Pressing plate; 414. Contact block; 4141. Roller; 415. Counterbore; 416. Projection; 417. Spring; 42. Knocking block; 43. Sliding mechanism; 431. Slide rail; 432. Slide block; 44. Annealing box; 5. Circulation module; 51. Base; 52. Top cylinder; 53. Carrying platform; 54. Pushing cylinder; 6. Connecting plate body; 61. Upper crank arm; 62. Lower crank arm; 63. Mounting hole; 7. Reinforcing member; 8. Stopping mechanism; 81. Sensor; 82. Stopping cylinder; 83. Stopping push rod. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0040] Example 1

[0041] As Figures 1 to 2 shown, a K-node connecting plate includes a connecting plate body 6, an upper bent arm 61 and a lower bent arm 62. The upper bent arm 61 and the lower bent arm 62 are fixedly connected in a K shape by fasteners. A plurality of mounting holes 63 are formed in the connecting plate body 6, and the distribution of the mounting holes 63 is arranged in a shape similar to that of the upper bent arm 61 and the lower bent arm 62; the short sides on the side of the connecting plate body 6 are perpendicular to the braces of the upper bent arm 61 and the lower bent arm 62 respectively.

[0042] As Figures 1 to 11 shown, a reinforcing member 7 is welded on the connecting plate body 6, and the reinforcing member 7 is located at the central opening of the K shape formed by the connection of the upper bent arm 61 and the lower bent arm 62;

[0043] After the reinforcing member 7 is welded to the connecting plate body 6, the flatness of the connecting plate body 6 is not greater than 4 mm.

[0044] Specifically, according to the width and plate thickness of different connecting plate bodies 6, after welding, the flatness parameters of the plates are shown in the following table:

[0045]

[0046] It is worth mentioning here that the connecting plate body 6 is fixed between the upper bent arm 61 and the lower bent arm 62 by fasteners, and the distribution of the mounting holes 63 is similar to the two, which is convenient for installation and fixation; a reinforcing member 7 is welded on the connecting plate body 6, and it is located at the central opening of the K shape, further improving the strength of the connecting plate body 6.

[0047] Example 2

[0048] As Figures 3 to 13 shown, this embodiment provides an automatic welding production line, including a frame 1, a pre-installation module 2, a welding module 3, a stress relief module 4 and a circulation module 5; a conveying device 11 is arranged on the frame 1, and the pre-installation module 2, the welding module 3 and the stress relief module 4 are sequentially arranged on the frame 1, and the circulation module 5 is arranged at both ends of the frame 1; the pre-installation module 2 positions and places the connecting plate body 6 and the reinforcing member 7 and performs bending and pre-welding; the welding module 3 performs complete welding on the connecting plate body 6 and the reinforcing member 7 conveyed by the pre-installation module 2; the stress relief module 4 performs stress relief treatment on the connecting plate body 6 and the reinforcing member 7 conveyed by the welding module 3; two sets of circulation modules 5 are arranged, respectively located at both ends of the frame 1, and the circulation module 5 maintains the movement and switching between the conveying devices 11.

[0049] It should be noted here that the conveying device 11 is provided with upper and lower parts on the frame 1. The conveying direction of the upper part of the conveying device 11 is from the input end of the production line to the output end of the production line; the conveying direction of the lower part of the conveying device 11 is from the output end of the production line to the input end of the production line. A guiding block 12 is also provided at the input end of the upper part of the conveying device 11.

[0050] As Figure 3 , 4 , shown in Fig. 9, the pre-assembly module 2 includes a cylinder 21, an upper die 22, a lower die 23, a pre-welding mechanism 24 and a spacer block 25; the top of the cylinder 21 is fixed to the upper part of the frame 1, and the push rod of the cylinder 21 is connected to the top of the upper die 22; the bottom of the upper die 22 is bent downward, a positioning groove 221 is opened in the middle of the upper die 22, the positioning groove 221 is parallel to the long side direction of the upper die 22, and mounting grooves 222 are symmetrically opened on both sides of the middle of the positioning groove 221; the lower die is arranged on the conveying device 11 to carry the connecting plate body 6 and is driven by the conveying device 11; the pre-welding mechanism 24 includes a wire feeder 241 and a welding torch 242, the wire feeder 241 is arranged on the top of the upper die 22, and two groups of welding torches 242 are arranged, respectively located in the mounting grooves 222; the spacer block 25 is installed on the frame 1, and the spacer block 25 is located below the mounting groove 222.

[0051] It should be noted here that when the connecting plate body 6 is placed on the lower die 23 and is conveyed by the conveying device 11 to the pre-assembly module 2 station, the conveying device 11 stops conveying, the cylinder 21 drives the upper die 22 to press down until there is still a distance of L1 between the upper die 22 and the connecting plate body 6. The bottom plate thickness of the reinforcing member 7 is L2, and L1 > L2. Manually push the side plate of the reinforcing member 7 against the side wall of the positioning groove 221 and push it between the upper die 22 and the connecting plate body 6 until one end of the reinforcing member 7 touches the bottom, completing the positioning.

[0052] As Figure 4 , 10 , shown in Fig., the lower die 23 includes a first lower die 231 and a second lower die 232, and a rotating shaft 233 is hinged between the first lower die 231 and the second lower die 232; a support rod 234 is hinged at the opposite end of the hinge of the first lower die 231, and a pressure rod 235 is hinged on the support rod 234; a positioning block 236 is arranged on the second lower die 232.

[0053] It should be noted here that the length of the rotating shaft 233 is greater than the width of the lower die 23. When the lower die 23 is transmitted to the pre-installation module 2 and stops, the rotating shaft 233 slides onto the upper surface of the cushion block 25 and is lifted by the cushion block 25, driving the first lower die 231 and the second lower die 232 to bulge upward, and cooperating with the upper die 22 to bend the connecting plate body 6 and the reinforcing member 7. After the rotating shaft 233 on the lower die 23 disengages from the cushion block 25, the lower die returns to the horizontal state.

[0054] It should be further noted here that an auxiliary support plate 13 is provided directly below the pre-installation module 2 and the upper transmission device 11. During the downward pressing process of the upper die 22, the auxiliary cylinder 14 lifts the auxiliary support plate 13 to support the transmission device 11.

[0055] It is worth mentioning here that the upper surface of the cushion block 25 is an arc surface, which is convenient for the contact and sliding of the rotating shaft 233; a torsion spring is provided at the hinge of the support rod 234, and the positioning block 236 is arranged in a shape similar to the corner of one end of the connecting plate body 6, which is convenient for the positioning and placement of the connecting plate body 6. The support rod 234 pushes the pressure rod 235 under the action of the torsion spring to continuously squeeze the other end face of the connecting plate body, preventing the connecting plate body 6 from deviating from the lower die 23 during the transmission process.

[0056] As Figure 5 、 6 shown, the welding module 3 includes an automatic welding mechanism 31 and a finishing mechanism 32; two groups of the automatic welding mechanisms 31 are provided and fixed on both sides of the frame 1; the finishing mechanism 32 is arranged on the top of the two groups of the automatic welding mechanisms 31.

[0057] It should be noted here that the finishing mechanism 32 is two oppositely arranged finishing cylinders 321, and clamping plates 322 are arranged on the push rods of the finishing cylinders 321.

[0058] It should be further noted here that when the lower die 23 carries the connecting plate body 6 and is transmitted to the welding module station, it stops moving. The push rods of the two side finishing cylinders 321 extend to drive the clamping plates 322 to clamp and finish the reinforcing member 7, so as to drive the connecting plate body 6 and the reinforcing member 7 that have been pre-welded to be in the accurate welding position.

[0059] As Figure 5 、 6As shown, the automatic welding mechanism 31 includes a mounting frame 311, a driver 312, a double-headed lead screw 313, a welding nozzle 314, and a preheating nozzle 315; the bottom of the mounting frame 311 is fixed to the frame 1; the driver 312 is mounted on one side of the mounting frame, and the output shaft of the driver 312 is coaxially and fixedly connected to the double-headed lead screw 313, and the double-headed lead screw 313 rotates synchronously with the output shaft of the driver 312; the welding nozzle 314 and the preheating nozzle 315 are integrally arranged and are jointly slidably arranged on the double-headed lead screw 313, and there are two groups of the welding nozzle 314 and the preheating nozzle 315 symmetrically arranged on the double-headed lead screw 313, and the preheating nozzle 315 is close to the end of the double-headed lead screw 313.

[0060] It should be noted here that when the driver 312 is started, the two preheating nozzles 315 move along the double-headed lead screw 313 towards both ends, and at the same time, low-intensity flames are ejected to uniformly preheat the connecting plate body 6 and the reinforcing member 7. When the driver 312 rotates in reverse, the preheating nozzle 315 returns to the initial position. When the driver 312 rotates forward, the welding nozzle 314 moves along the double-headed lead screw 313 towards both ends, and at the same time, the connecting plate body 6 and the reinforcing member 7 are welded; a wire feeder 241 is arranged on the top of the mounting frame 311.

[0061] Embodiment III

[0062] As Figure 7 、 11 、shown in FIGS. 11 and 12, the components that are the same or corresponding to those in Embodiment I adopt the corresponding reference numerals in Embodiment I. The stress relieving module 4 includes a pressing block 41, a knocking block 42, a sliding mechanism 43, and an annealing box 44; the pressing block 41 includes an upper plate 411, a connecting rod 412, a pressing plate 413, and a contact block 414. The upper plate 411 is fixed to the frame 1. A plurality of counterbores 415 are formed in the top of the upper plate 411. The connecting rod 412 is suspended from the bottom of the upper plate 411 corresponding to the counterbores 415. A spring 417 is sleeved on the connecting rod 412. The lower end of the connecting rod 412 is fixedly connected to the pressing plate 413. A plurality of the contact blocks 414 are arranged at the bottom of the pressing plate 413; a roller 4141 is rotatably arranged at the bottom of the contact block 414; the difference between the knocking block 42 and the pressing block 41 is that convex blocks 416 extend downward at both ends of the pressing plate 413 on the knocking block 42. A plurality of groups of the pressing block 41 and the knocking block 42 are alternately arranged in sequence; two groups of the sliding mechanism 43 are symmetrically arranged. The sliding mechanism 43 includes a slide rail 431 and two groups of sliders 432. The slide rail is fixedly arranged on the frame 1. The slide rail 431 is located directly below the convex block 416. The slider 432 is slidably arranged on the slide rail 431; the annealing box 44 is wrapped around the end of the frame 1.

[0063] It should be noted here that during the process of transporting the welded connecting plate body 6 and the reinforcing member 7 to the stress relieving module 4 station, the connecting plate body 6 and the reinforcing member 7 slide past the contact block 414 and push the contact block 414 upward. Under the action of the spring, the contact block 414 maintains downward extrusion to further fix the connecting plate body 6 and the reinforcing member 7; the sliding mechanisms 43 on both sides of the frame 1 are activated, and the slider 432 slides past the lower part of the convex block 416, pushing up the contact block 414 on the knocking block 42. After the slider 432 disengages from the convex block 416, the convex block 416 drops under the action of the spring 417 and knocks on the connecting plate body 6 and the reinforcing member 7.

[0064] It should be further noted here that the starting position of the slider 432 is located below the middle of a number of arrayed knocking blocks 42, and the knocking blocks 42 are driven to knock on the connecting plate body 6 and the reinforcing member 7 in sequence from the middle to both ends, which is beneficial to the uniform release of residual stress.

[0065] It is worth mentioning here that the annealing box 44 is located outside the pressing block 41 and the knocking block 42, and appropriate temperature and heat preservation time are controlled during the knocking action to further eliminate residual stress; the roller 4141 converts the contact with the connecting plate body 6 and the reinforcing member 7 from sliding friction to rolling friction, reducing the friction between components and increasing their service life.

[0066] As Figure 3 、 8 shown, the circulation module 5 includes a base 51, a top cylinder 52, a loading platform 53 and a pushing cylinder 54; the base 51 is arranged at one end of the frame 1, and the top cylinder 52 is arranged on the base 51; the loading platform 53 is fixedly connected to the top push rod of the top cylinder 52; the pushing cylinder 54 is horizontally arranged on the base 51, and the moving direction of the push rod of the pushing cylinder 54 when it extends is towards the frame 1.

[0067] It should be noted here that after stress relieving, the connecting plate body 6 and the reinforcing member 7 continue to be transported with the lower die 23. The push rod of the top cylinder 52 rises to keep the loading platform 53 at the same horizontal line as the upper conveying device 11. The lower die 23 is transported onto the loading platform 53 to unload the welded connecting plate body 6. The push rod of the top cylinder 52 retracts to keep the loading platform 53 at the same horizontal line as the lower conveying device 11. The push rod of the pushing cylinder 54 extends to push the lower die onto the lower conveying device 11 for transportation. The working process of the circulation module 5 at the other end is similar.

[0068] It is worth mentioning here that the surface of the loading platform 53 is provided with a number of rollers to facilitate the movement and transportation of the lower die.

[0069] As Figure 4 、 5As shown, stop mechanisms 8 are symmetrically arranged on both sides at the output ends of the welding module 3 and the stress relieving module 4. The stop mechanism 8 includes a sensor 81, a stop cylinder 82, and a stop push rod 83. The sensor 81 is installed on the frame 1 on one side of the conveying device 11. The stop cylinder 82 is arranged on the frame 1 on the same side as the sensor 81, and a stop push rod 83 is arranged on the stop cylinder 82.

[0070] It should be noted here that when the sensor 81 detects the transfer of the connecting plate body 6, the stop cylinder 82 extends the stop push rod 83 to intercept the lower die 23. At this time, the conveying mechanism 11 has stopped conveying, and the interception of the stop push rod 83 prevents the lower die from shifting due to inertia.

[0071] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automated welding production line for a K-node connecting plate, used for welding a K-node connecting plate, the K-node connecting plate comprising a connecting plate body (6), an upper curved arm (61) and a lower curved arm (62), the upper curved arm (61) and the lower curved arm (62) being fixedly connected in a K-shape by fasteners, the connecting plate body (6) being provided with a plurality of mounting holes (63), the distribution of the mounting holes (63) being arranged to match the mounting positions of the upper curved arm (61) and the lower curved arm (62); the short sides of the side surfaces of the connecting plate body (6) being respectively perpendicular to the diagonal braces of the upper curved arm (61) and the lower curved arm (62); a reinforcing member (7) being welded to the connecting plate body (6), the reinforcing member (7) being located at a central opening of the K-shape formed by connecting the upper curved arm (61) and the lower curved arm (62); after the reinforcing member (7) is welded to the connecting plate body (6), the unevenness of the connecting plate body (6) is not greater than 4 mm; The automated welding production line comprises a frame (1), characterized in that: It also includes a pre-installation module (2), a welding module (3), a stress relief module (4) and a circulation module (5); The frame (1) is provided with a conveying device (11), the frame (1) is provided with a pre-installation module (2), a welding module (3) and a stress relief module (4) in sequence, and the circulation module (5) is provided at both ends of the frame (1); The pre-installed module (2) positions and places the connecting plate body (6) and the reinforcing member (7) and performs press bending and pre-welding; The welding module (3) completely welds the connecting plate body (6) and the reinforcing member (7) transmitted from the pre-installation module (2); The stress relief module (4) performs stress relief processing on the connection plate body (6) and the reinforcement member (7) transmitted from the welding module (3); The circulation modules (5) are provided in two groups, which are respectively located at two ends of the frame (1), and the circulation modules (5) maintain the movement and switching between the conveying devices (11).

2. The K-node connection plate automated welding production line according to claim 1 is characterized in that: The pre-installed module (2) comprises a cylinder (21), an upper die (22), a lower die (23), a pre-welding mechanism (24) and a cushion block (25); The top of the cylinder (21) is fixed to the upper part of the frame (1), and the push rod of the cylinder (21) is connected to the top of the upper mold (22); The bottom of the upper mold (22) is bent downward, a positioning groove (221) is provided in the middle of the upper mold (22), the positioning groove (221) is parallel to the long side direction of the upper mold (22), and mounting grooves (222) are symmetrically provided on both sides of the middle of the positioning groove (221); The lower mold is arranged on the conveying device (11) to carry the connecting plate body (6) and is driven along with the conveying device (11); The pre-welding mechanism (24) comprises a wire feeder (241) and a welding gun (242); the wire feeder (241) is arranged on the top of the upper die (22); and two groups of welding guns (242) are arranged, and are respectively located in the mounting grooves (222); The cushion block (25) is mounted on the frame (1), and the cushion block (25) is located below the mounting groove (222).

3. The K-node connection plate automated welding production line according to claim 2 is characterized in that: The lower mold (23) comprises a first lower mold (231) and a second lower mold (232), wherein a rotating shaft (233) is hingedly connected in the middle of the first lower mold (231) and the second lower mold (232); A support rod (234) is hingedly connected to the opposite end of the hinge of the first lower mold (231), and a pressure rod (235) is hingedly connected to the support rod (234); A positioning block (236) is provided on the second lower mold (232).

4. The K-node connection plate automated welding production line according to claim 1, characterized in that: The welding module (3) comprises an automatic welding mechanism (31) and a finishing mechanism (32); The automatic welding mechanism (31) is provided in two groups and is fixed on both sides of the frame (1); The arranging mechanism (32) is arranged on the top of the two sets of automatic welding mechanisms (31).

5. The K-node connection plate automatic welding production line according to claim 4 is characterized in that: The automatic welding mechanism (31) comprises a mounting frame (311), a driver (312), a double-headed lead screw (313), a welding nozzle (314) and a preheating nozzle (315); The bottom of the mounting frame (311) is fixed on the frame (1); The driver (312) is mounted on one side of the mounting frame, the output shaft of the driver (312) is coaxially fixedly connected to the double-headed lead screw (313), and the double-headed lead screw (313) rotates synchronously with the output shaft of the driver (312); The welding nozzle (314) and the preheating nozzle (315) are integrally arranged and slidably arranged on the double-ended lead screw (313). Two groups of the welding nozzle (314) and the preheating nozzle (315) are symmetrically arranged on the double-ended lead screw (313), and the preheating nozzle (315) is close to the end of the double-ended lead screw (313).

6. The K-node connection plate automated welding production line according to claim 1, characterized in that: The stress relief module (4) comprises a pressing block (41), a knocking block (42), a sliding mechanism (43), and an annealing box (44); The pressing block (41) comprises an upper plate (411), a connecting rod (412), a pressing plate (413) and a contact block (414); the upper plate (411) is fixed on the frame (1); a plurality of countersunk holes (415) are provided on the top of the upper plate (411); the connecting rod (412) is suspended on the bottom of the upper plate (411) corresponding to the countersunk holes (415); a spring (417) is sleeved on the connecting rod (412); the lower end of the connecting rod (412) is fixedly connected to the pressing plate (413); and a plurality of contact blocks (414) are provided on the bottom of the pressing plate (413); A roller (4141) is rotatably provided at the bottom of the contact block (414); The knocking block (42) is different from the pressing block (41) in that both ends of the pressing plate (413) on the knocking block (42) are provided with protrusions (416) extending downward, and the pressing block (41) and the knocking block (42) are alternately provided in a plurality of groups. The sliding mechanism (43) is symmetrically arranged in two groups, and the sliding mechanism (43) comprises a sliding rail (431) and two groups of sliding blocks (432). The sliding rail (431) is fixedly arranged on the frame (1), the sliding rail (431) is located directly below the protrusion (416), and the sliding block (432) is slidably arranged on the sliding rail (431); The annealing box (44) is coated on the rear end of the frame (1).

7. The K-node connection plate automated welding production line according to claim 1, characterized in that: The circulation module (5) comprises a base (51), a top cylinder (52), a loading platform (53) and a pushing cylinder (54); The base (51) is arranged at one end of the frame (1), and the top cylinder (52) is arranged on the base (51); The loading platform (53) is fixedly connected to the top push rod of the top cylinder (52); The pushing cylinder (54) is horizontally arranged on the base (51), and the movement direction of the push rod of the pushing cylinder (54) when extending is toward the frame (1).

8. The K-node connection plate automated welding production line according to claim 1, characterized in that: Stop mechanisms (8) are symmetrically arranged on both sides of the output ends of the welding module (3) and the stress relief module (4), and the stop mechanisms (8) include a sensor (81), a stop cylinder (82), and a stop push rod (83); The sensor (81) is mounted on a frame (1) on one side of the conveying device (11); The stop cylinder (82) is arranged on the same side as the sensor (81) on the frame (1), and a stop push rod (83) is arranged on the stop cylinder (82).

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