A welding device for a steel structure of an automobile seat

Abstract

The present application relates to the technical field of butt welding, and particularly relates to a welding equipment for a steel structure of an automobile seat, which comprises a fixing frame, a rotating frame, a positioning plate, a first clamping assembly and a second clamping assembly. Before welding a splicing point of pipe fittings, the first clamping assembly is used for rough positioning of the pipe fittings, and two groups of the second clamping assemblies are used for clamping the pipe fittings on both sides of the splicing point. By subdividing the second clamping assembly into a first clamping unit and a second clamping unit, the distance between the first clamping unit, the second clamping unit and the splicing point is adjusted, the clamping force of the first clamping unit and the second clamping unit on the pipe fittings is controlled, and the stability of the pipe fittings in the welding process is improved. When the first clamping unit exerts hard clamping on the pipe fittings, the second clamping unit vibrates the pipe fittings. In the process of vibrating the pipe fittings by the second clamping unit, the assembly stress generated when the pipe fittings are clamped by the first clamping unit is eliminated, and the probability of tearing the splicing point after welding is reduced.

Description

Technical Field

[0001] This invention relates to the field of joint welding technology, and more specifically to a welding device for automotive seat steel structures. Background Technology

[0002] The steel structure of automotive seats is a core component ensuring seat support strength, operational stability, and driving safety. It is primarily formed by bending, splicing, and welding irregularly shaped tubing. The welding precision and forming stability of the steel structure directly determine the assembly precision, load-bearing capacity, and service life of the automotive seat, which is crucial to the overall vehicle's driving safety and comfort. Currently, traditional welding clamping equipment has many inherent defects in the welding process of automotive seat steel structure tubing, easily leading to problems such as welding precision deviations, structural deformation, and weld damage, making it difficult to meet the demands of high-precision, high-yield mass production.

[0003] In the pre-treatment and clamping positioning stages of pipe fittings, the forming and tooling clamping errors are the primary factors affecting welding accuracy. During the bending and forming process of steel structure pipe fittings for seats, the pipe body is prone to forming deviations due to factors such as equipment precision and material properties, directly causing axial misalignment at the pipe fitting joint. At the same time, traditional welding fixtures often use rigid clamping methods, which are prone to uneven clamping force and clamping positioning offsets during operation, further aggravating the axial error of the pipe fitting joint, resulting in inaccurate pipe fitting alignment, significantly reducing the accuracy and overall stability of subsequent welding operations, and causing basic assembly deviations.

[0004] Traditional positioning and clamping mechanisms have poor adaptability to various working conditions, presenting a technical challenge of balancing clamping position and clamping force, which further affects welding quality. If the clamping position is far from the weld area, although the elastic deformation of the pipe can be overcome by increasing the clamping force to achieve stable clamping, a force arm will be formed between the clamping point and the weld. The vibration of the equipment will be transmitted to the end of the weld, causing slight displacement vibration and severely reducing the alignment accuracy of the pipe. If the clamping distance is shortened and the positioning is closer to the weld, the excessive clamping force will squeeze the pipe under the heating conditions of welding, causing thermal deformation and extrusion deformation of the seat steel structure pipe, thus destroying the pipe's forming specifications.

[0005] In addition, during the clamping process of traditional rigid clamping structures, a large amount of assembly stress is stored in the pipe at the clamping point. When the pipe is being corrected and aligned during the clamping process, a large amount of elastic internal stress is also generated. When the clamp is released after welding, the elastic internal stress and the assembly stress are released together. At this time, the weld metal has not been completely cooled and crystallized, and the structural strength has not met the standard. The release of elastic internal stress and assembly stress at this moment can easily cause quality defects such as weld tearing, misalignment of circumferential welds, and overall twisting of the pipe, which greatly reduces the product yield and increases production rework costs. Summary of the Invention

[0006] This invention provides a welding device for automotive seat steel structures to solve the problem of low yield of pipe fittings welded by existing welding equipment.

[0007] The welding equipment for automotive seat steel structures of the present invention adopts the following technical solution: A welding device for automotive seat steel structures includes a fixed frame, a rotating frame, a positioning plate, a first clamping assembly, and a second clamping assembly.

[0008] The rotating frame is rotatably connected to the fixed frame, which is equipped with a power source to drive the rotating frame to rotate and a welding mechanism. The positioning plate is fixedly mounted on the rotating frame and has a limiting groove, allowing the pipe fitting to be placed within the limiting groove. The positioning plate has a welding notch, and the splicing point of the pipe fitting is correspondingly positioned at the welding notch. The first clamping assembly is used for coarse positioning of the pipe fitting within the limiting groove. Two sets of the second clamping assembly are provided, distributed on both sides of the welding notch. Each set of the second clamping assembly includes a first clamping unit and a second clamping unit. The distance between the first clamping unit and the welding notch is greater than the distance between the second clamping unit and the welding notch. The first clamping unit rigidly clamps the pipe fitting, while the second clamping unit provides a floating clamping. When the first clamping unit stably clamps the pipe fitting, the second clamping unit vibrates the pipe fitting.

[0009] Furthermore, the first clamping unit includes a first fixing block, a first swing rod, and a first pressing block. The first fixing block is fixedly mounted on the positioning plate. A first positioning groove is provided on the first fixing block. The bottom of the first positioning groove is coplanar with the bottom of the limiting groove. The first swing rod is hinged to the first fixing block. The first pressing block is slidably mounted on the first swing rod. A first tightening component is provided on the first swing rod. The first tightening component is used to drive the first pressing block to tightly press the tube.

[0010] Furthermore, a first locking rod is slidably disposed on the first fixed block, and a first locking hole is disposed at the end of the first swing rod away from the hinged first fixed block. When the first swing rod swings at a preset angle and the first pressing block is aligned with the first positioning groove, the first locking rod can be inserted into the first locking hole to restrict the swing of the first swing rod.

[0011] Furthermore, the first tightening assembly includes a first tightening rod, a first guide rod, and a first elastic element. The first guide rod is fixedly disposed on the first pressing block and slidably inserted into the first swing rod. The first elastic element is disposed between the first pressing block and the first swing rod. When the first locking rod is inserted into the first locking hole, the first pressing block does not contact the tube. The first tightening rod is threaded through the first swing rod, and the first tightening rod can push the first pressing block to squeeze the tube when rotating.

[0012] Furthermore, the second clamping unit includes a second fixed block, a second swing rod, a second pressing block, and a buffer plate. The second fixed block is fixedly mounted on the positioning plate, and the distance between the second fixed block and the welding notch is less than the distance between the first fixed block and the welding notch. A second positioning groove is provided on the second fixed block. Two buffer plates are provided, and the buffer plates are slidably mounted on the groove wall of the second positioning groove. A buffer spring is provided between the buffer plate and the side wall of the second positioning groove. The second swing rod is hinged to the second fixed block, and the second pressing block is slidably mounted on the second swing rod. A second elastic element is provided between the second pressing block and the second swing rod. During the swinging process of the second swing rod, as the second swing rod drives the second pressing block to gradually align with the second positioning groove, the second pressing block can contact the pipe and gradually cause the second elastic element to deform.

[0013] Furthermore, a second locking rod is slidably disposed on the second fixed block, and a second locking hole is disposed at the end of the second swing rod away from the hinged second fixed block. When the second swing rod swings at a preset angle and the second pressing block is aligned with the second positioning groove, the second locking rod can be inserted into the second locking hole to restrict the swing of the second swing rod.

[0014] Furthermore, the first fixing block and the second fixing block are fixedly connected by a connecting plate, the first locking rod and the second locking rod are fixedly connected by a crossbeam, and a locking spring is provided between the crossbeam and the connecting plate; the first swing rod and the second swing rod are fixedly connected by a synchronizing rod.

[0015] Furthermore, a vibration mechanism is provided on the second swing rod, which is used to strike the second extrusion block when the first extrusion block is stably clamped.

[0016] Furthermore, the vibration mechanism includes a piston-type pneumatic vibrator, which is mounted on the second swing rod, and the output end of the piston-type pneumatic vibrator abuts against the second extrusion block; the piston-type pneumatic vibrator is provided with an air source inlet, and an air supply pipe is connected to the air source inlet, and the other end of the air supply pipe is connected to an air supply pump, which is capable of outputting high-pressure gas.

[0017] Furthermore, the first clamping assembly includes a plurality of quick clamps, each quick clamp having an abutment and a handle, the handle being used to drive the abutment to press against the tube within the limiting groove.

[0018] The beneficial effects of the present invention are as follows: The present invention provides a welding equipment for automotive seat steel structures, which includes a fixed frame, a rotating frame, a positioning plate, a first clamping assembly, and a second clamping assembly. When welding the automotive seat steel structure, the bent tube is placed in the limiting groove of the positioning plate. By adjusting the position of the tube in the limiting groove, the splicing point of the tube is ensured to be at the welding notch on the positioning plate. The welding mechanism on the fixed frame is aligned with the welding notch to ensure that the welding mechanism can weld the splicing point of the tube. During the welding process of the splicing point of the tube, the power source provided on the fixed frame drives the rotating frame to rotate, thereby uniformly welding the circumferential direction of the welding point of the tube. Furthermore, before welding the pipe fitting splice point, the first clamping assembly is used to roughly position the pipe fitting. The first clamping assembly is mainly used to prevent the pipe fitting from falling out of the limiting groove. Next, two sets of second clamping assemblies are used to clamp the pipe fitting on both sides of the splice point. By subdividing the second clamping assembly into a first clamping unit and a second clamping unit, and adjusting the distance between the first clamping unit, the second clamping unit and the splice point, as well as controlling the clamping force of the first clamping unit and the second clamping unit on the pipe fitting, the stability of the pipe fitting during the welding process is improved. When the first clamping unit applies a hard clamp to the pipe fitting, the second clamping unit vibrates the pipe fitting. During the vibration of the pipe fitting by the second clamping unit, the assembly stress generated when the pipe fitting is clamped by the first clamping unit is eliminated, thereby reducing the probability of tearing at the splice point after welding. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a welding device for automotive seat steel structure provided in an embodiment of the present invention; Figure 2A front view of a welding equipment for an automotive seat steel structure provided in an embodiment of the present invention; Figure 3 An exploded view of a welding device for automotive seat steel structures provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a welding equipment for a steel structure of an automobile seat, with the fixing frame and rotating frame hidden, provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of a pipe component and a set of second clamping assemblies in a welding equipment for a steel structure of an automobile seat, provided in an embodiment of the present invention. Figure 6 This is a state diagram of a welding device for a steel structure of an automobile seat when a pipe is placed into the second clamping assembly, as provided in an embodiment of the present invention. Figure 7 This is a schematic diagram of the structure of the second clamping assembly in a welding equipment for automotive seat steel structures, provided in an embodiment of the present invention. Figure 8 An exploded view of the structure of the second clamping assembly in a welding equipment for automotive seat steel structures provided in an embodiment of the present invention; Figure 9 A side view of a second clamping assembly in a welding device for an automotive seat steel structure, provided in an embodiment of the present invention; Figure 10 for Figure 9 A cross-sectional view along the AA direction; Figure 11 for Figure 10 A magnified view of a section at point B in the middle.

[0021] In the diagram: 110, fixed frame; 120, rotating frame; 130, welding mechanism; 140, positioning plate; 141, limiting groove; 150, quick clamp; 210, first fixed block; 211, first positioning groove; 212, first receiving platform; 220, first swing rod; 230, first pressing block; 240, first locking rod; 250, first tightening rod; 260, first guide rod; 270, first elastic element; 310, second fixed block; 320, second swing rod; 330, second pressing block; 340, buffer plate; 350, buffer spring; 360, second guide rod; 370, second elastic element; 380, second receiving platform; 390, second locking rod; 410, piston-type pneumatic vibrator; 510, connecting plate; 520, crossbeam; 530, synchronous rod. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] like Figures 1 to 11 As shown in the figure, an embodiment of the present invention provides a welding equipment for a steel structure of an automobile seat, which includes a fixed frame 110, a rotating frame 120, a positioning plate 140, a first clamping assembly, and a second clamping assembly.

[0026] The fixed frame 110 serves as the support base for the entire machine and can be fixed to the ground or operating table. The rotating frame 120 is rotatably connected to the fixed frame 110, and a power source is mounted on the fixed frame 110. In this embodiment, the power source is preferably a servo motor or a geared motor. The output end of the power source is connected to the rotating frame 120 via a transmission connection, enabling the power source to drive the rotating frame 120 to rotate at a constant speed or intermittently relative to the fixed frame 110 around its rotation center. Furthermore, the rotation center of the rotating frame 120 is horizontally positioned. The fixed frame 110 also includes a welding mechanism 130, which comprises a longitudinal rod and a welding torch. The longitudinal rod is fixedly mounted on the fixed frame 110 and is always vertical. The welding torch is detachably mounted on the upper end of the longitudinal rod, and its tilt angle on the longitudinal rod is adjustable to ensure that the welding torch can be aligned with the splicing point of the pipe fitting. This allows for uniform welding of the circumference of the pipe fitting splicing point during the rotation of the rotating frame 120.

[0027] The positioning plate 140 is fixedly mounted on the rotating frame 120 and rotates synchronously with the rotating frame 120. Furthermore, the positioning plate 140 is fixed to the rotating frame 120 by locking screws, ensuring the stability of the positioning plate 140 on the rotating frame 120. The locking screws also facilitate the replacement of positioning plates 140 of different sizes. A limiting groove 141 is formed on the surface of the positioning plate 140. The cross-sectional shape of the limiting groove 141 is adapted to the outer contour of the pipe fitting to be welded, allowing the bent pipe fitting to be stably placed within the limiting groove 141. A welding notch is formed on the positioning plate 140 at the corresponding position of the pipe fitting splicing point. The welding notch penetrates along the thickness direction of the positioning plate 140, ensuring that the splicing point of the pipe fitting is precisely exposed at the welding notch. This facilitates welding operations on the splicing point from above or to the side by the welding mechanism 130 and the welding torch.

[0028] The first clamping assembly is used for coarse positioning of the pipe fitting within the limiting groove 141. Specifically, before welding, the first clamping assembly is used to coarsely position the pipe fitting placed within the limiting groove 141. The first clamping assembly includes multiple quick clamps 150, which are spaced apart on the positioning plate 140 along the extension direction of the limiting groove 141. Each quick clamp 150 has an abutment and a handle. When the operator operates the handle, the abutment is driven to press against the outer wall of the pipe fitting within the limiting groove 141, thereby initially pressing the pipe fitting within the limiting groove 141 to prevent it from detaching from the limiting groove 141 during subsequent adjustment or welding. This coarse positioning step applies only a small clamping force to the pipe fitting to limit large-scale movement of the pipe fitting, without limiting the small adjustment margin of the pipe fitting within the limiting groove 141 along its axial or circumferential direction.

[0029] After coarse positioning, the pipe fitting is further finely clamped and stress-relieved using the second clamping assembly. Two sets of the second clamping assembly are provided, distributed on either side of the weld notch, i.e., on either side of the pipe fitting splice point. Each set of the second clamping assembly includes a first clamping unit and a second clamping unit. The distance between the first clamping unit and the weld notch is greater than the distance between the second clamping unit and the weld notch; that is, the first clamping unit is relatively farther from the weld area, while the second clamping unit is closer to the weld area. The first clamping unit provides rigid clamping to the pipe fitting, providing a stable positioning reference; the second clamping unit provides floating clamping. After the first clamping unit provides stable clamping, the second clamping unit can apply a vibrational force to the pipe fitting, eliminating the assembly stress generated when the pipe fitting is clamped by the first clamping unit.

[0030] The present invention discloses a welding device for automotive seat steel structures. When welding automotive seat steel structures, the bent pipe is placed in the limiting groove 141 of the positioning plate 140. By adjusting the position of the pipe in the limiting groove 141, the splicing point of the pipe is ensured to be at the welding notch on the positioning plate 140. The welding mechanism 130 on the fixing frame 110 is aligned with the welding notch to ensure that the welding mechanism 130 can weld the splicing point of the pipe. During the welding process of the splicing point of the pipe, the power source provided on the fixing frame 110 drives the rotating frame 120 to rotate, thereby uniformly welding the circumferential direction of the welding point of the pipe. Furthermore, before welding the pipe fitting splice point, the first clamping assembly is used to roughly position the pipe fitting. The first clamping assembly is mainly used to prevent the pipe fitting from falling out of the limiting groove 141. Secondly, two sets of second clamping assemblies are used to clamp the pipe fitting on both sides of the splice point. By subdividing the second clamping assembly into a first clamping unit and a second clamping unit, and adjusting the distance between the first clamping unit, the second clamping unit and the splice point, as well as controlling the clamping force of the first clamping unit and the second clamping unit on the pipe fitting, the stability of the pipe fitting during the welding process is improved. When the first clamping unit applies a hard clamp to the pipe fitting, the second clamping unit vibrates the pipe fitting. During the vibration of the pipe fitting by the second clamping unit, the assembly stress generated when the pipe fitting is clamped by the first clamping unit is eliminated, thereby reducing the probability of tearing at the splice point after welding.

[0031] In one embodiment, the first clamping unit includes a first fixing block 210, a first swing rod 220, and a first pressing block 230. The first fixing block 210 is fixedly mounted on the positioning plate 140, and a first positioning groove 211 is formed on the first fixing block 210. The bottom of the first positioning groove 211 is coplanar with the bottom of the limiting groove 141, thereby ensuring that the bottom of the pipe is always stably supported when it is clamped, and avoiding the situation where the pipe generates additional bending moment due to the inconsistent height of the support surfaces of the first positioning groove 211 and the limiting groove 141. One end of the first swing rod 220 is hinged to the first fixing block 210 through a hinge shaft, ensuring that the first swing rod 220 can swing relative to the first fixing block 210. Furthermore, when the pipe is not placed in the first positioning groove 211, the first swing rod 220 can be in any state. When it is necessary to place the pipe in the first positioning groove 211, the first swing rod 220 is pushed to rotate, ensuring that the first positioning groove 211 is in an open-out state, thereby ensuring that the pipe can be smoothly placed in the first positioning groove 211. The first pressing block 230 is slidably disposed on the first swing rod 220. The sliding direction of the first pressing block 230 on the first swing rod 220 is perpendicular to the direction of the first swing rod 220. After the pipe is placed in the first positioning groove 211, the first swing rod 220 is pushed again to swing relative to the first fixed block 210. The first pressing block 230 on the first swing rod 220 simultaneously swings to the outside of the pipe, and the first pressing block 230 is aligned with the pipe. The first swing arm 220 is also provided with a first clamping component. The first clamping component is used to drive the first pressing block 230 to tightly press the pipe in the first positioning groove 211. Under the action of the first clamping component, the first pressing block 230 and the first positioning groove 211 together perform rigid clamping on the pipe.

[0032] Furthermore, since the cross-section of the pipe is circular, in order to ensure that the first positioning groove 211 and the first pressing block 230 can stably clamp the pipe, the first positioning groove 211 is set to a V-shape, and the first pressing block 230 is also set to a V-shaped notch. When the first positioning groove 211 and the first pressing block 230 clamp the pipe together, the pipe can simultaneously contact the inclined sidewalls of the first positioning groove 211 and the first pressing block 230, thereby improving the stability of clamping the pipe.

[0033] In one embodiment, a first receiving platform 212 is provided on the first fixed block 210. When the first swing rod 220 swings at a specified angle, the first pressing block 230 aligns with the pipe fitting. At this time, the first receiving platform 212 receives the end of the first swing rod 220 away from the hinged first fixed block 210. Further, to achieve rapid locking after the first swing rod 220 swings, a first locking rod 240 is slidably provided on the first fixed block 210. The extension direction of the first locking rod 240 is the same as the extension direction of the first swing rod 220 when it abuts against the first receiving platform 212. The first locking rod 240 can slide along its own extension direction on the first fixed block 210. A first locking hole is provided at the end of the first swing rod 220 away from its hinged end with the first fixed block 210. When the first swing rod 220 swings downward at a preset angle, the first swing rod 220 abuts against the first receiving platform 212. At this time, the first locking rod 240 is aligned with the first locking hole, and the operator can push the first locking rod 240 into the first locking hole, thereby limiting the rotation of the first swing rod 220 and ensuring the stability of the first swing rod 220 in its current clamping posture.

[0034] In one embodiment, the first clamping assembly includes a first clamping rod 250, a first guide rod 260, and a first elastic element 270. The first guide rod 260 is fixedly disposed on the first pressing block 230 and slidably inserted into the first swing rod 220. The extension direction of the first guide rod 260 is perpendicular to the extension direction of the first swing rod 220, and the first guide rod 260 provides guidance for the first pressing block 230 to move closer to or away from the pipe. The first elastic element 270 is disposed between the first pressing block 230 and the first swing rod 220. When the first locking rod 240 is inserted into the first locking hole, the first pressing block 230 has not yet contacted the pipe under the pre-compression of the first elastic element 270. The first clamping rod 250 is threaded through the first swing rod 220. The extension direction of the first clamping rod 250 is the same as that of the first guide rod 260. A rotating handle is provided at the end of the first clamping rod 250, allowing the operator to rotate it. During rotation, the first clamping rod 250 gradually pushes the first pressing block 230 closer to the pipe. By rotating the first clamping rod 250, the first pressing block 230 applies a hard pressing force to the pipe, ensuring that the clamping force of the first pressing block 230 and the first positioning groove 211 can overcome the elastic deformation of the pipe and equipment vibration during the welding process.

[0035] In one embodiment, the second clamping unit includes a second fixing block 310, a second swing rod 320, a second pressing block 330, and a buffer plate 340. The second fixing block 310 is fixedly mounted on the positioning plate 140, and the distance between the second fixing block 310 and the welding notch is less than the distance between the first fixing block 210 and the welding notch, that is, the second clamping unit is closer to the welding notch. A second positioning groove is provided on the second fixing block 310, and the second positioning groove is set as a V-shape. A buffer plate 340 is slidably mounted on each of the two opposite sidewalls of the second positioning groove. The buffer plate 340 is parallel to the sidewall of the second positioning groove. A buffer spring 350 is provided between each buffer plate 340 and the corresponding sidewall of the second positioning groove. In the initial state, the buffer spring 350 is in its original length state, and there is a gap between the buffer plate 340 and the sidewall of the second positioning groove.

[0036] One end of the second swing rod 320 is hinged to the second fixed block 310, and the second pressing block 330 is slidably disposed on the second swing rod 320. Specifically, a second guide rod 360 is slidably inserted into the second swing rod 320, the extension direction of the second guide rod 360 being perpendicular to the extension direction of the second swing rod 320, and the end of the second guide rod 360 away from the second swing rod 320 being fixedly connected to the second pressing block 330. A second elastic element 370 is disposed between the second pressing block 330 and the second swing rod 320. During the downward swing of the second swing rod 320, the second swing rod 320 drives the second pressing block 330 to gradually align with the second positioning groove. The second pressing block 330 first contacts the outer wall of the pipe, and as the second swing rod 320 continues to swing downward, it gradually causes the second elastic element 370 to compress and deform. During the deformation of the second elastic element 370, the buffer spring 350 deforms synchronously, thereby achieving floating clamping of the pipe.

[0037] In one embodiment, a second receiving platform 380 is provided on the second fixed block 310. When the second swing rod 320 swings at a specified angle, the second pressing block 330 aligns with the pipe fitting. At this time, the second receiving platform 380 receives the end of the second swing rod 320 away from the hinged second fixed block 310. Further, to achieve rapid locking after the second swing rod 320 swings, a second locking rod 390 is slidably provided on the second fixed block 310. The extension direction of the second locking rod 390 is the same as the extension direction of the second swing rod 320 when it abuts against the second receiving platform 380. The second locking rod 390 can slide on the second fixed block 310 along its own extension direction. A second locking hole is provided at the end of the second swing rod 320 away from its hinged end with the second fixed block 310. When the second swing rod 320 swings downward at a preset angle, the second swing rod 320 abuts against the second receiving platform 380. At this time, the second locking rod 390 is aligned with the second locking hole, and the operator can push the second locking rod 390 into the second locking hole, thereby limiting the rotation of the second swing rod 320 and ensuring the stability of the second swing rod 320 in its current clamping posture.

[0038] In one embodiment, to eliminate the assembly stress accumulated in the pipe fitting during rigid clamping, a vibration mechanism is provided on the second swing rod 320. The vibration mechanism is used to strike the second pressing block 330 after the first pressing block 230 has stably clamped the pipe fitting (i.e., after the first clamping unit has completed rigid clamping), causing the second pressing block 330 to generate high-frequency micro-amplitude vibration. This vibration is transmitted to the clamped pipe fitting, thereby promoting the release of the assembly stress of the pipe fitting before welding.

[0039] In one embodiment, the vibration mechanism includes a piston-type pneumatic vibrator 410, which is mounted on a second swing arm. The output end of the piston-type pneumatic vibrator 410 abuts against a second compression block. The piston-type pneumatic vibrator 410 has an air source inlet, a supply pipe connected to the inlet, and an air pump connected to the other end of the supply pipe. The air pump is capable of outputting high-pressure gas. Furthermore, the vibration frequency and intensity of the piston-type pneumatic vibrator 410 can be determined by controlling the output power of the air pump.

[0040] In one embodiment, the first fixing block 210 and the second fixing block 310 are fixedly connected by a connecting plate 510, and the first locking rod 240 and the second locking rod 390 are fixedly connected by a crossbeam 520. A locking spring is provided between the crossbeam 520 and the connecting plate 510. When the locking spring is in its original length state, the ends of the first locking rod 240 and the second locking rod 390 protrude towards the first receiving platform and the second receiving platform. The ends of the first locking rod 240 and the second locking rod 390 away from the crossbeam 520 are set in an arc shape to facilitate the insertion of the first locking rod 240 into the first locking hole and the second locking rod 390 into the second locking hole. The first swing rod 220 and the second swing rod 320 are fixedly connected by a synchronizing rod 530. A traction handle is provided on the synchronizing rod 530, allowing the operator to simultaneously drive the first swing rod 220 and the second swing rod 320 using the traction handle.

[0041] 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, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding equipment for automotive seat steel structures, characterized in that, include: Fixture; A rotating frame is rotatably connected to a fixed frame. The fixed frame is provided with a power source that drives the rotating frame to rotate, and a welding mechanism is provided on the fixed frame. A positioning plate is fixedly mounted on the rotating frame. The positioning plate is provided with a limiting groove, in which the pipe fitting can be placed. The positioning plate is provided with a welding notch, and the splicing point of the pipe fitting is correspondingly located at the position of the welding notch. A first clamping assembly is used to coarsely position the pipe fitting within the limiting groove. The second clamping assembly comprises two sets, distributed on both sides of the welding notch. Each set includes a first clamping unit and a second clamping unit. The distance between the first clamping unit and the welding notch is greater than the distance between the second clamping unit and the welding notch. The first clamping unit rigidly clamps the pipe, while the second clamping unit floats the pipe. When the first clamping unit stably clamps the pipe, the second clamping unit vibrates the pipe.

2. The welding equipment for automotive seat steel structure according to claim 1, characterized in that: The first clamping unit includes a first fixing block, a first swing rod, and a first pressing block. The first fixing block is fixedly mounted on the positioning plate. The first fixing block is provided with a first positioning groove. The bottom of the first positioning groove is coplanar with the bottom of the limiting groove. The first swing rod is hinged to the first fixing block. The first pressing block is slidably mounted on the first swing rod. The first swing rod is provided with a first tightening component. The first tightening component is used to drive the first pressing block to tightly press the tube.

3. The welding equipment for automotive seat steel structures according to claim 2, characterized in that: A first locking rod is slidably disposed on the first fixed block, and a first locking hole is provided at the end of the first swing rod away from the hinged first fixed block. When the first swing rod swings at a preset angle and the first pressing block is aligned with the first positioning groove, the first locking rod can be inserted into the first locking hole to restrict the swing of the first swing rod.

4. The welding equipment for automotive seat steel structure according to claim 3, characterized in that: The first clamping assembly includes a first clamping rod, a first guide rod, and a first elastic element. The first guide rod is fixedly mounted on the first pressing block and slidably inserted into the first swing rod. The first elastic element is disposed between the first pressing block and the first swing rod. When the first locking rod is inserted into the first locking hole, the first pressing block does not contact the tube. The first clamping rod is threaded through the first swing rod, and when the first clamping rod rotates, it can push the first pressing block to squeeze the tube.

5. The welding equipment for automotive seat steel structure according to claim 3, characterized in that: The second clamping unit includes a second fixed block, a second swing rod, a second pressing block, and a buffer plate. The second fixed block is fixedly mounted on the positioning plate, and the distance between the second fixed block and the welding notch is less than the distance between the first fixed block and the welding notch. A second positioning groove is provided on the second fixed block. Two buffer plates are provided, and the buffer plates are slidably mounted on the groove wall of the second positioning groove. A buffer spring is provided between the buffer plate and the side wall of the second positioning groove. The second swing rod is hinged to the second fixed block, and the second pressing block is slidably mounted on the second swing rod. A second elastic element is provided between the second pressing block and the second swing rod. During the swinging process of the second swing rod, as the second swing rod drives the second pressing block to gradually align with the second positioning groove, the second pressing block can contact the pipe and gradually cause the second elastic element to deform.

6. The welding equipment for automotive seat steel structure according to claim 5, characterized in that: A second locking rod is slidably disposed on the second fixed block, and a second locking hole is provided at the end of the second swing rod away from the hinged second fixed block. When the second swing rod swings at a preset angle and the second pressing block is aligned with the second positioning groove, the second locking rod can be inserted into the second locking hole to restrict the swing of the second swing rod.

7. The welding equipment for automotive seat steel structure according to claim 6, characterized in that: The first fixed block and the second fixed block are fixedly connected by a connecting plate, the first locking rod and the second locking rod are fixedly connected by a crossbeam, and a locking spring is provided between the crossbeam and the connecting plate; the first swing rod and the second swing rod are fixedly connected by a synchronizing rod.

8. The welding equipment for automotive seat steel structure according to claim 5, characterized in that: The second swing arm is equipped with a vibration mechanism, which is used to strike the second extrusion block when the first extrusion block is stably clamped.

9. The welding equipment for automotive seat steel structure according to claim 8, characterized in that: The vibration mechanism includes a piston-type pneumatic vibrator, which is mounted on the second swing rod. The output end of the piston-type pneumatic vibrator abuts against the second extrusion block. The piston-type pneumatic vibrator is provided with an air source inlet, and an air supply pipe is connected to the air source inlet. The other end of the air supply pipe is connected to an air supply pump, which is capable of outputting high-pressure gas.

10. The welding equipment for automotive seat steel structure according to claim 1, characterized in that: The first clamping assembly includes a plurality of quick clamps, each quick clamp having an abutment and a handle, the handle being used to drive the abutment to press against the tube within the limiting groove.

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