K node connecting plate and automatic welding production line thereof

Abstract

According to the K joint connecting plate and the automatic welding production line thereof, the strength of a K joint is improved through a connecting plate body, and the K joint connecting plate comprises a rack, a preassembling module, a welding module, a destressing module and a circulating module; a conveying device is arranged on the rack, a preassembling module, a welding module and a destressing module are sequentially arranged on the rack, and the circulating modules are arranged at the two ends of the rack; the connecting plate body and the reinforcer are positioned, placed, bent and pre-welded by the pre-assembling module; the welding module is used for completely welding the connecting plate body and the reinforcing piece which are conveyed by the preassembling module; the destressing module is used for carrying out destressing treatment on the connecting plate body and the reinforcing piece which are transmitted by the welding module; the two sets of circulating modules are located at the two ends of the rack correspondingly, and the circulating modules keep moving and switching among the pre-assembling module, the welding module and the destressing module.

Description

Technical Field

[0001] The invention relates to the field of welding equipment, and in particular to a K-node connecting plate and an automated welding production line thereof. Background Art

[0002] In modern industry, welding, as an important connection technology, is widely used in various fields. During the construction and installation of cathead towers, the K node of the curved arm assembly of the tower head is prone to deformation due to the influence of tower structure, power load, wind force, temperature and other factors. It is necessary to increase the strength by welding the connecting plate body. In addition, due to the rapid unbalanced heating and cooling during the welding process, the connecting plate body will inevitably produce non-negligible deformation, making it difficult to install.

[0003] A Chinese invention with publication number CN116604235A discloses welding equipment that can reduce welding deformation, which includes a welding anti-deformation device capable of anti-deforming at least one welded workpiece, wherein the welded workpiece has a middle part and two side parts, and the welding anti-deformation device includes a support assembly, at least one group of bending components and at least one group of belt shifting components. The support assembly includes a support body and at least one side support member, each side support member has an arc surface, and the arc surface formed by the side support member is configured to contact the lower bottom surface of the welded workpiece, the side support member has a high end and two low ends lower than the high end, a group of bending components is provided with two, and the two bending components are slidably installed on the support body, each bending component includes a clamping assembly and a driving member, the clamping assembly includes a mounting component and a movable clamping member, the movable clamping member has a clamping member portion, and the driving member is used to drive the clamping member portion formed by the movable clamping member to approach or move away from the upper surface of the side portion above the low end portion.

[0004] However, this technical solution has the following shortcomings: factors that affect welding deformation include rapid changes in workpiece temperature, different welding processes, elimination of welding stress, etc. This invention has certain limitations in reducing welding deformation only by reverse deformation. Summary of the invention

[0005] The purpose of the present invention is to address the shortcomings of the prior art and provide a K-node connecting plate, which utilizes a reinforcement member arranged at the K-shaped opening to enhance the strength of the connecting plate body, and at the same time utilizes a new welding forming method to improve the dimensional accuracy of the connecting plate after welding, and improve the strength and connection accuracy of the connecting plate after installation, thereby improving the tower head strength of the cathead tower and ensuring the normal operation of the tower under extreme weather conditions.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a K-node connecting plate, comprising a connecting plate body, an upper curved arm and a lower curved arm, wherein the upper curved arm and the lower curved arm are fixedly connected in a K shape by fasteners, and a plurality of mounting holes are opened on the connecting plate body, and the distribution of the mounting holes is matched with the mounting positions of the upper curved arm and the lower curved arm; the short sides of the side surfaces of the connecting plate body are respectively perpendicular to the diagonal braces of the upper curved arm and the lower curved arm.

[0007] As a preference, a reinforcement is welded on the connecting plate body, and the reinforcement is located at the K-shaped central opening formed by the connection of the upper curved arm and the lower curved arm; after the connecting plate body is welded with the reinforcement, the unevenness of the connecting plate body is no more than 4 mm.

[0008] Another object of the present invention is to address the shortcomings of the prior art and provide a K-node connecting plate automated welding production line, which reduces welding deformation by setting up a pre-installation module, a welding module, and a stress relief module, so that the connection plate body after welding can maintain the position of the mounting hole within the tolerance range, thereby facilitating the installation of the connection plate body. At the same time, a circulation module is set to improve the efficiency of processing and production.

[0009] A K-node connecting plate automated welding production line comprises a frame, a pre-installation module, a welding module, a stress relief module and a circulation module; the frame is provided with a conveying device, the frame is provided with a pre-installation module, a welding module and a stress relief module in sequence, and the circulation module is arranged at both ends of the frame; the pre-installation module positions and places a connecting plate body and a reinforcement, and performs press bending and pre-welding; the welding module completely welds the connecting plate body and the reinforcement conveyed by the pre-installation module; the stress relief module performs stress relief treatment on the connecting plate body and the reinforcement conveyed by the welding module; the circulation module is provided with two groups, which are respectively located at both ends of the frame, and the circulation module maintains the movement and switching between the pre-installation module, the welding module and the stress relief module.

[0010] Preferably, the pre-installation module comprises a cylinder, an upper die, a lower die, a pre-welding mechanism and a gasket; 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, and a positioning groove is opened in the middle of the upper die, and the positioning groove is parallel to the long side direction of the upper die, and installation grooves are symmetrically opened 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 by the conveying device; the pre-welding mechanism comprises a wire feeder and a welding gun, the wire feeder is arranged on the top of the upper die, and the welding gun is provided with two groups, which are respectively located in the installation grooves; the gasket is installed on the frame, and the gasket is located below the installation groove.

[0011] Preferably, the lower die comprises a first lower die and a second lower die, wherein a rotating shaft is hinged in the middle of the first lower die and the second lower die; a support rod is hinged on the opposite ends of the hinge of the first lower die, and a pressure rod is hinged on the support rod; a positioning block is arranged on the second lower die.

[0012] As a preferred embodiment, the welding module includes an automatic welding mechanism and a finishing mechanism; the automatic welding mechanism is provided in two groups and fixed on both sides of the frame; the finishing mechanism is provided on the top of the two groups of automatic welding mechanisms; As a preferred embodiment, 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 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 slidably arranged on the double-headed lead screw together, and the welding nozzle and the preheating nozzle are symmetrically arranged in two groups on the double-headed lead screw, and the preheating nozzle is close to the end of the double-headed lead screw.

[0013] As a preferred embodiment, the stress relief module includes a pressure block, a knocking block, a sliding mechanism, and an annealing box; the pressure block includes an upper plate, a connecting rod, a pressure plate and a contact block, the upper plate is fixed on the frame, a plurality of countersunk holes are opened on the top of the upper plate, the connecting rod is suspended at the bottom of the upper plate corresponding to the countersunk holes, a spring is sleeved on the connecting rod, the lower end of the connecting rod is fixedly connected to a pressure plate, and a plurality of contact blocks are arranged at the bottom of the pressure plate; a roller is rotatably arranged at the bottom of the contact block; the difference between the knocking block and the pressure block is that the two ends of the pressure plate on the knocking block are extended downwardly with protrusions; the sliding mechanism is symmetrically arranged in two groups, 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 located directly below the protrusion, and the slider is slidably arranged on the slide rail; the annealing box is coated on the tail end of the frame.

[0014] Preferably, 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 movement direction of the pushing cylinder push rod when extending is toward the frame.

[0015] As a preferred embodiment, stop mechanisms are symmetrically arranged on both sides of the output ends of the welding module and the stress relief module, and the stop mechanisms include a sensor, a stop cylinder, and a stop push rod; the sensor is installed on a frame on one side of the conveying device; the stop cylinder is arranged on the same side of the frame as the sensor, and a stop push rod is arranged on the stop cylinder.

[0016] The beneficial effects of the present invention are: (1) The present invention fixes the connecting plate body between the upper curved arm and the lower curved arm by fasteners, and the distribution of the mounting holes is in the same shape as the two arms, which is convenient for installation and fixation; a reinforcement piece is welded on the connecting plate body, and the reinforcement piece is located at the central opening of the K-shape, which further improves the strength of the connecting plate body.

[0017] (2) The present invention can quickly position the reinforcement member at the position where the connecting plate body needs to be welded by setting a pre-installed module, and then reversely pre-deform the connecting plate body and the reinforcement member through the extrusion cooperation of the upper mold and the lower mold to offset the welding deformation. At the same time, it also makes the reinforcement member fit the connecting plate body more closely, reduces the weld seam, improves the quality after welding, reduces dimensional deformation, and improves installation efficiency.

[0018] (3) The present invention sets a welding module to preheat the connecting plate body and the reinforcement member with a preheating nozzle before welding the reinforcement member and the connecting plate body, thereby reducing the temperature change gradient during welding and further reducing the deformation generated during welding. The double-headed screw rotates to make the two sets of welding nozzles move from the middle of the screw to both ends, and the connecting plate body is welded from the middle to both ends, so that the heat is evenly diffused to both ends, which also reduces the stress concentration phenomenon, ensures the consistency of the weld quality, and improves the performance after welding.

[0019] (4) The present invention provides a stress relief module and uses a knocking block to knock on the connection plate body and the reinforcement after welding, and the knocking action is to knock from the middle to both ends in sequence, so as to promote the uniform release of residual stress and reduce welding deformation. The strength and toughness of the weld can also be improved during the knocking process, thereby improving the mechanical properties of the connection plate body. The annealing box controls the appropriate temperature and insulation time to further eliminate residual stress and effectively control bending deformation.

[0020] (5) The present invention switches the position of the lower mold on the conveyor by setting a circulation module, thereby reducing the time and energy of manual handling, avoiding the situation of untimely connection with the pre-installed module, improving the degree of automation, and further improving the efficiency of welding production.

[0021] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the K-node connection plate structure; Figure 2 for Figure 1 The structural diagram at A in the middle; Figure 3 This is a schematic diagram of the structure of an automated welding production line; Figure 4 It is a partial schematic diagram of the present invention; Figure 5 It is a partial schematic diagram of the present invention; Figure 6 It is a partial schematic diagram of the present invention; Figure 7 It is a partial schematic diagram of the present invention; Figure 8 It is a partial schematic diagram of the present invention; Fig. 9 It is a partial schematic diagram of the present invention; Fig.10 It is a partial schematic diagram of the present invention; Fig.11 It is a partial schematic diagram of the present invention; Fig.12 for Fig.11 The enlarged view of point B in the middle; Fig.13 It is a partial schematic diagram of the present invention.

[0023] Description of the drawings: 1. Frame; 11. Conveying device; 12. Guide block; 13. Auxiliary support plate; 14. Auxiliary cylinder; 2. Pre-installed module; 21. Cylinder; 22. Upper die; 221. Positioning slot; 222. Mounting slot; 23. Lower die; 231. First lower die; 232. Second lower die; 233. Rotating shaft; 234. Support rod; 235. Press rod; 236. Positioning block; 24. Pre-welding mechanism; 241. Wire feeder; 242. Welding gun; 3. Welding module; 31. Automatic welding mechanism; 32. Arrangement mechanism; 311. Mounting frame; 312. Driver; 313. Double-headed screw; 314. Welding nozzle; 315. Preheating nozzle; 3 21. Arranging cylinder; 322. Clamp; 4. Stress relief module; 41. Pressure block; 411. Upper plate; 412. Connecting rod; 413. Pressure plate; 414. Contact block; 4141. Roller; 415. Countersunk hole; 416. Bump; 417. Spring; 42. Knock block; 43. Sliding mechanism; 431. Slide rail; 432. Slider; 44. Annealing box; 5. Circulation module; 51. Base; 52. Top cylinder; 53. Loading table; 54. Push cylinder; 6. Connecting plate body; 61. Upper curved arm; 62. Lower curved arm; 63. Mounting hole; 7. Reinforcement; 8. Stop mechanism; 81. Sensor; 82. Stop cylinder; 83. Stop push rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying 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 limiting 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 number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0026] Embodiment 1 like Figure 1 to Figure 2 As shown, a K-node connecting plate includes a connecting plate body 6, an upper curved arm 61 and a lower curved arm 62, wherein the upper curved arm 61 and the lower curved arm 62 are fixedly connected in a K shape by fasteners, and a plurality of mounting holes 63 are opened on the connecting plate body 6, and the distribution of the mounting holes 63 is arranged in a contour with the upper curved arm 61 and the lower curved arm 62; the short sides of the side surfaces of the connecting plate body 6 are respectively perpendicular to the diagonal braces of the upper curved arm 61 and the lower curved arm 62.

[0027] like Figures 1 to 11 As shown, a reinforcement member 7 is welded on the connecting plate body 6, and the reinforcement member 7 is located at the K-shaped central opening formed by the connection of the upper curved arm 61 and the lower curved arm 62; After the connecting plate body 6 is welded to the reinforcing member 7 , the unevenness of the connecting plate body 6 is no greater than 4 mm.

[0028] Specifically, according to the width of the connecting plate body 6 and the thickness of the plate, after welding, the unevenness parameters of the plate are shown in the following table:

[0029] It is worth mentioning here that the connecting plate body 6 is fixed between the upper curved arm 61 and the lower curved arm 62 by fasteners, and the distribution of the mounting holes 63 is in the same shape as the two, which is convenient for installation and fixation; a reinforcement member 7 is welded on the connecting plate body 6, and it is located at the K-shaped central opening, which further improves the strength of the connecting plate body 6.

[0030] Embodiment 2 like Figures 3 to 13 As shown, this embodiment provides an automated 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 arranged on the frame 1 in sequence, 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 reinforcement 7 and performs press bending and pre-welding; the welding module 3 completely welds the connecting plate body 6 and the reinforcement 7 transmitted from the pre-installation module 2; the stress relief module 4 performs stress relief treatment on the connecting plate body 6 and the reinforcement 7 transmitted from the welding module 3; the circulation module 5 is provided with two groups, which are respectively located at the two ends of the frame 1, and the circulation module 5 maintains the movement and switching between the conveying devices 11.

[0031] It should be noted here that the conveying device 11 is provided with an upper and a lower part on the frame 1. The conveying direction of the upper 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 conveying device 11 is from the output end of the production line to the input end of the production line, and a guide block 12 is also provided at the input end of the upper conveying device 11.

[0032] like Figure 3 , 4 As shown in Figure 9, the pre-installed module 2 includes 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 die 22; the bottom of the upper die 22 is bent downward, and a positioning groove 221 is opened in the middle of the upper die 22, and the positioning groove 221 is parallel to the long side direction of the upper die 22, and the two sides of the middle of the positioning groove 221 are symmetrically opened with mounting grooves 222; the lower die is arranged on the conveying device 11 to carry the connecting plate body 6 and is driven with the conveying device 11; the pre-welding mechanism 24 includes a wire feeder 241 and a welding gun 242, the wire feeder 241 is arranged on the top of the upper die 22, and the welding gun 242 is provided with two groups, which are respectively located in the mounting grooves 222; the cushion block 25 is installed on the frame 1, and the cushion block 25 is located below the mounting groove 222.

[0033] It should be noted here that when the connecting plate body 6 is placed on the lower mold 23 and is conveyed to the pre-installed module 2 station by the conveying device 11, the conveying device 11 stops conveying, and the cylinder 21 drives the upper mold 22 to press down until the upper mold 22 is at a distance L1 from the connecting plate body 6. The bottom plate thickness of the reinforcement 7 is L2, L1>L2, and the side plate of the reinforcement 7 is manually pushed against the side wall of the positioning groove 221 into between the upper mold 22 and the connecting plate body 6 until one end of the reinforcement 7 touches the bottom to complete the positioning.

[0034] like Figure 4 , 10 As shown, the lower mold 23 includes a first lower mold 231 and a second lower mold 232, and a rotating shaft 233 is hinged in the middle of the first lower mold 231 and the second lower mold 232; a support rod 234 is hinged on the opposite end of the hinge of the first lower mold 231, and a pressure rod 235 is hinged on the support rod 234; a positioning block 236 is provided on the second lower mold 232.

[0035] It should be noted here that the length of the rotating shaft 233 is greater than the width of the lower mold 23. When the lower mold 23 is transmitted to the pre-installed module 2 and stops, the rotating shaft 233 slides to the upper surface of the cushion block 25 and is lifted up by the cushion block 25, driving the first lower mold 231 and the second lower mold 232 to bulge upward, and cooperate with the upper mold 22 to bend the connecting plate body 6 and the reinforcement 7. After the rotating shaft 233 on the lower mold 23 is separated from the cushion block 25, the lower mold returns to a horizontal state.

[0036] It should be further explained that an auxiliary support plate 13 is provided directly below the pre-installed module 2 and the upper conveying device 11 . When the upper mold 22 is pressed downward, the auxiliary cylinder 14 lifts the auxiliary support plate 13 to support the conveying device 11 .

[0037] 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 arranged at the hinge of the support rod 234, and the positioning block 236 is arranged in a contour with the corners of one end of the connecting plate body 6, which is convenient for the positioning and placement of the connecting plate body 6. Under the action of the torsion spring, the support rod 234 pushes the pressure rod 235 to continuously squeeze the other end face of the connecting plate body to prevent the connecting plate body 6 from deviating from the lower mold 23 during the transmission process.

[0038] like Figure 5 , 6 As shown, the welding module 3 includes an automatic welding mechanism 31 and a sorting mechanism 32 ; the automatic welding mechanism 31 is provided with two groups, fixed on both sides of the frame 1 ; the sorting mechanism 32 is provided on the top of the two groups of the automatic welding mechanism 31 .

[0039] It should be noted that the arranging mechanism 32 is two arranging cylinders 321 arranged opposite to each other, and a clamping plate 322 is arranged on the push rod of the arranging cylinder 321 .

[0040] It should be further explained that when the lower mold 23 carrying the connecting plate body 6 is transferred to the welding module station, it stops moving, and the push rods of the adjusting cylinders 321 on both sides extend to drive the clamping plate 322 to clamp and adjust the reinforcement 7, thereby driving the pre-welded connecting plate body 6 and the reinforcement 7 to the accurate welding position.

[0041] like Figure 5 , 6 As 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 on the frame 1; the driver 312 is installed on one side of the mounting frame, and 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 are slidably arranged on the double-headed lead screw 313 together, and the welding nozzle 314 and the preheating nozzle 315 are symmetrically arranged in two groups on the double-headed lead screw 313, and the preheating nozzle 315 is close to the end of the double-headed lead screw 313.

[0042] It should be noted here that the driver 312 is started to move the two preheating nozzles 315 along the double-headed screw 313 to both ends, and at the same time, a low-intensity flame is sprayed to uniformly preheat the connecting plate body 6 and the reinforcement 7. The driver 312 is reversed to return the preheating nozzles 315 to the initial position. The driver 312 rotates forward, and the welding nozzle 314 moves along the double-headed screw 313 to both ends, and at the same time, the connecting plate body 6 and the reinforcement 7 are welded; a wire feeder 241 is provided on the top of the mounting frame 311.

[0043] Embodiment 3 like Figure 7 , 11, 12, wherein the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment, 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 to 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 at the bottom of the upper plate 411 corresponding to the countersunk holes 415, a spring 417 is sleeved on the connecting rod 412, a pressing plate 413 is fixedly connected to the lower end of the connecting rod 412, and a plurality of countersunk holes 415 are provided on the bottom of the upper plate 411 The contact block 414 is provided with a roller 4141 for rotation at the bottom of the contact block 414; the difference between the knocking block 42 and the pressing block 41 is that the two 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 several groups in sequence; the sliding mechanism 43 is symmetrically provided with two groups, and the sliding mechanism 43 includes a slide rail 431 and two groups of sliders 432, the slide rail is fixedly provided on the frame 1, the slide rail 431 is located directly below the protrusion 416, and the slider 432 is slidably provided on the slide rail 431; the annealing box 44 is covered on the tail end of the frame 1.

[0044] It should be noted here that, during the process of transferring the welded connecting plate body 6 and reinforcement 7 to the stress relief module 4 station, the connecting plate body 6 and reinforcement 7 slide through the contact block 414 and lift the contact block 414. Under the action of the spring, the contact block 414 keeps being squeezed downward to further fix the connecting plate body 6 and the reinforcement 7; the sliding mechanism 43 located on both sides of the frame 1 is started, and the slider 432 slides under the protrusion 416 to lift the contact block 414 on the knocking block 42. After the slider 432 detaches from the protrusion 416, the protrusion 416 falls and knocks the connecting plate body 6 and the reinforcement 7 under the action of the spring 417.

[0045] It should be further explained here that the starting position of the slider 432 is located below the middle of several arrays of knocking blocks 42, which drives the knocking blocks 42 to knock the connecting plate body 6 and the reinforcement 7 from the middle to both ends in sequence, which is conducive to the uniform release of residual stress.

[0046] It is worth mentioning here that the annealing box 44 is located outside the pressure block 41 and the knocking block 42, and controls the appropriate temperature and insulation time when the knocking action is performed to further eliminate residual stress; the roller 4141 converts the contact with the connecting plate body 6 and the reinforcement 7 from sliding friction to rolling friction, reducing the friction between the components and increasing their service life.

[0047] like Figure 3 , 8As 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 movement direction of the push rod of the pushing cylinder 54 when extending is toward the frame 1.

[0048] It should be noted here that the stress-relieved connecting plate body 6 and reinforcement 7 continue to be conveyed with the lower mold 23, the push rod of the top cylinder 52 rises, keeping the stage 53 and the upper conveying device 11 on the same horizontal line, and the lower mold 23 is conveyed to the stage 53, and the welded connecting plate body 6 is taken off the line, the push rod of the top cylinder 52 is retracted, keeping the stage 53 and the lower conveying device 11 on the same horizontal line, and the push rod of the push cylinder 54 is extended to push the lower mold to the lower conveying device 11 for conveying, and the working process of the circulation module 5 at the other end is similar.

[0049] It is worth mentioning here that the surface of the stage 53 is provided with a plurality of rollers to facilitate the movement and transportation of the lower mold.

[0050] like Figure 4 , 5 As shown, 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 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 same side of the frame 1 as the sensor 81, and a stop push rod 83 is arranged on the stop cylinder 82.

[0051] It should be noted here that when the sensor 81 detects that the connecting plate body 6 is being transmitted, the stop cylinder 82 extends the stop push rod 83 to intercept the lower mold 23. At this time, the transmission mechanism 11 has stopped transmitting, and the interception of the stop push rod 83 prevents the lower mold from being displaced due to inertia.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A K-node connecting plate, comprising a connecting plate body (6), an upper curved arm (61) and a lower curved arm (62), wherein the upper curved arm (61) and the lower curved arm (62) are fixedly connected in a K shape by fasteners, characterized in that: A plurality of mounting holes (63) are provided on the connecting plate body (6), and the distribution of the mounting holes (63) matches 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) are respectively perpendicular to the diagonal braces of the upper curved arm (61) and the lower curved arm (62).

2. A K-node connecting plate according to claim 1, wherein a reinforcing member (7) is welded on the connecting plate body (6), and the reinforcing member (7) is located at a K-shaped central opening formed by connecting the upper curved arm (61) and the lower curved arm (62); After the connecting plate body (6) is welded to the reinforcing member (7), the unevenness of the connecting plate body (6) is no greater than 4 mm.

3. An automated welding production line for K-node connecting plates, used for welding a K-node connecting plate as claimed in claim 2, comprising 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).

4. The K-node connection plate automated welding production line according to claim 3 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).

5. The K-node connection plate automatic welding production line according to claim 4 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).

6. The K-node connection plate automated welding production line according to claim 3 is 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).

7. The K-node connection plate automatic welding production line according to claim 6 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).

8. The K-node connection plate automated welding production line according to claim 3 is 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).

9. The K-node connection plate automated welding production line according to claim 3, 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).

10. The K-node connection plate automated welding production line according to claim 3, 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) and the sensor (81) are arranged on the frame (1) on the same side, and a stop push rod (83) is arranged on the stop cylinder (82).

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