A guide rail support nut automatic welding device

Abstract

This application discloses an automatic welding nut device for guide rail brackets, including a worktable, a feeding system, a positioning mechanism, a centering rotation mechanism, and a welding device. Welding stations and feeding stations are spaced apart on the worktable. The feeding system is installed on the side of the worktable to transport the guide rail brackets to be welded to the feeding station and push them one by one to the welding station. The positioning mechanism is located on the side of the welding station to position the brackets during the welding process. The centering rotation mechanism is located above the welding station, and the welding device is located on the side of the welding station. The advantages of this application are: the feeding system enables automatic feeding of brackets and nuts, while the centering rotation mechanism aligns the nuts with the holes in the brackets, allowing the welding device to accurately weld the nuts. Compared to traditional methods, this application can achieve a fully automatic welding process for guide rail brackets, thereby effectively improving the welding efficiency and quality of guide rail brackets.

Description

Technical Field

[0001] This application relates to the field of automotive parts processing technology, and in particular to an automatic welding nut device for a guide rail bracket. Background Technology

[0002] like Figure 1 and Figure 2 The diagram shows a structural schematic of an existing automotive guide rail bracket. The guide rail bracket 100 mainly includes a bracket 110 and a nut 120. The bracket 110 is generally L-shaped, with one side serving as a mounting portion 111. Flanges 113 are provided on both sides of the mounting portion 111, and a through hole 112 is provided in the center of the mounting portion 111. The nut 120 is a specially designed welded nut. Protruding welded portions 122 are provided at the four corners of one end of the nut 120, and an unmachined threaded center hole 121 is provided in the center of the nut 120.

[0003] To ensure the installation accuracy of the guide rail bracket, during the production of the guide rail bracket, it is often necessary to first spot weld the nut 120 to the mounting part 111 of the bracket 110 through the four corner welding parts 122, so that the center hole 121 of the nut 120 is aligned with the through hole 112. Then, using the mounting part 111 of the bracket 110 as a reference, the center hole 121 of the nut 120 is tapped. This ensures that the bolt can smoothly engage with the nut 120 during the installation of the guide rail bracket. Current technology often uses manual or semi-automatic welding for the spot welding connection between the bracket 110 and the nut 120, which not only affects the welding quality of the guide rail bracket but also reduces the production efficiency. Summary of the Invention

[0004] One objective of this application is to provide an automatic welding nut device for guide rail brackets that can solve at least one of the defects in the above-mentioned background art.

[0005] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: an automatic welding nut device for guide rail brackets, comprising a worktable, a feeding system, a positioning mechanism, a centering rotation mechanism, and a welding device; the worktable is provided with welding stations and feeding stations spaced apart; the feeding system is installed on the side of the worktable to transport the guide rail brackets to be welded to the feeding station and push them one by one to the welding station; the positioning mechanism is located on the side of the welding station to position the brackets during the welding process; the centering rotation mechanism is located on the side of the welding station. The welding device is located on the side of the welding station, above the welding station. The welding process includes a first process and a second process. In the first process, the centering rotation mechanism drives the nut in the guide rail bracket to be welded to align with the through hole of the bracket. At this time, the welding device welds the two welding parts of the nut parallel to the side wall of the flange on the bracket. In the second process, the centering rotation mechanism keeps the nut aligned with the through hole and drives the guide rail bracket to rotate 180° by driving the nut. Then, the welding device welds the remaining two welding parts of the nut in the guide rail bracket.

[0006] Preferably, the centering rotation mechanism includes a fourth telescopic device, a second rotating device, and a retracting assembly; the fourth telescopic device is fixedly installed and connected to the second rotating device through its output end; the retracting assembly is installed at the output end of the second rotating device; the fourth telescopic device is adapted to drive the retracting assembly to move axially; the end of the retracting assembly forms a retracting opening for centering and clamping the nut, and the center of the retracting opening is aligned with the through hole on the bracket; during the first process, the nut falls into the retracting opening, the opening size of which is larger than the cross-sectional size of the nut, and then the retracting assembly retracts under the drive of the second rotating device and drives the nut to align with the through hole; during the second process, the retracting assembly maintains the retraction of the nut and drives the guide rail bracket to rotate 180° under the drive of the second rotating device.

[0007] Preferably, the second rotating device is mounted on the output end of the fourth telescopic device via a connecting frame; the retracting assembly includes a traction plate, a guide plate, and four retracting blocks; the four retracting blocks are arranged around each other to form the retracting opening, the connecting frame extends to the output end of the second rotating device and engages with the guide plate via a clutch structure; the retracting blocks and the guide plate engage via a guide structure, the traction plate is connected to the output end of the second rotating device and engages with the retracting blocks via a traction structure; during the first process, the traction plate rotates under the drive of the second rotating device, at which time the guide plate remains stationary under the restriction of the clutch structure, and then the retracting blocks gradually retract through the traction structure and the guide structure until the cross-section of the retracting opening is a square corresponding to the cross-sectional size of the nut; during the second process, the retracting blocks maintain the retraction clamping of the nut, at which time the traction plate, driven by the second rotating device, drives the guide plate to disengage from the restriction of the clutch structure and rotate synchronously by 180°.

[0008] Preferably, the upper end of the gathering block is provided with a radially extending traction seat, the upper end face of the traction seat is provided with a guide pin with a circular cross-section, and the lower end face of the traction seat is provided with a traction block with a rectangular cross-section; the guide plate is provided above the traction seat, and the guide plate is provided with four guide grooves equidistantly distributed along the circumference, the guide grooves cooperating with the corresponding guide pins to form the guiding structure; the traction plate is provided below the traction seat, and the traction seat is provided with four traction grooves equidistantly distributed along the circumference, the traction grooves cooperating with the corresponding traction blocks to form the traction structure; wherein, the extension directions of the traction grooves and the guide grooves are not parallel.

[0009] Preferably, the connecting frame is provided with a support base at the output end of the second rotating device, and the support base is located above the guide plate; the clutch structure includes a clutch block, a second spring, and a clutch groove; the clutch block is elastically slidably installed along the axial direction of the guide plate by means of the second spring, and the clutch groove is provided in the support base; when the clutch block engages with the clutch groove under the elastic force of the second spring, the guide plate is restricted; when the clutch block passes over the clutch groove under the drive of the traction plate, the restriction of the guide plate is released.

[0010] Preferably, the support base and the guide plate are engaged by multiple clutch structures arranged circumferentially, with each clutch structure positioned at a different distance from the center of the guide plate. Each clutch structure corresponds to two clutch slots, spaced 180° apart circumferentially from the support base. During the welding process, the traction plate rotates continuously in a first direction. Specifically, during the first process, the clutch block engages with one of the clutch slots; during the second process, the clutch block rotates 180° along the first direction with the guide plate and then engages with the other clutch slot. After the welding process is completed, the traction plate rotates in a second direction opposite to the first direction, causing the closing block to gradually open from a closed state, while the guide plate remains stationary under the action of the clutch structures.

[0011] Preferably, the gathering assembly further includes a pressure block located within the gathering opening, the pressure block being axially elastically slidably mounted on the guide plate; the pressure block is adapted to apply pressure to the nut against the bracket during the welding process; an electromagnet is also provided within the pressure block, the electromagnet being adapted to attract the nut to the center near the gathering opening by the magnetic force generated by energizing it before the first process; the electromagnet is adapted to remain de-energized during the welding process.

[0012] Preferably, the loading station is formed on the workbench by a first limiting plate and a second limiting plate arranged in parallel, and the loading station extends towards the welding station. The loading system includes a first loading device, a second loading device, a first pushing mechanism, and a second pushing mechanism. The loading end of the first loading device is connected to the end of the loading station away from the welding station and conveys a bracket to the loading station. The loading end of the second loading device is connected to one side of the middle of the loading station and conveys a nut to the loading station. The second pushing mechanism is installed on the loading end of the second loading device and is used to push the nuts conveyed by the second loading device to the mounting part of the bracket in sequence. The first pushing mechanism is installed on the workbench and its driving end is located at the end of the loading station near the welding part, and is used to push the bracket with the nut in place to the welding station in sequence.

[0013] Preferably, the first pushing mechanism includes a first telescopic device and a first rotating device; the first telescopic device is fixedly installed, and the first rotating device is installed on the drive end of the first telescopic device. The first rotating device is adapted to rotate the first push plate installed on the drive end between the two supports closest to the welding station, and then the first push plate, driven by the first telescopic device, pushes the support closest to the welding station to the welding station; the second pushing mechanism includes a second telescopic device and a third telescopic device; the second telescopic device is horizontally fixed, and the third telescopic device is vertically installed on the drive end of the second telescopic device; the third telescopic device is adapted to insert the first insertion rod installed on the drive end into the center hole of the latter nut of the two nuts closest to the loading station, and then the first insertion rod, driven by the second telescopic device, pushes the nut closest to the loading station onto the support of the loading station.

[0014] Preferably, the positioning mechanism includes a fifth telescopic device, a sixth telescopic device, and a seventh telescopic device; the fifth telescopic device and the sixth telescopic device are horizontally arranged opposite each other on both sides of the welding station, and the fifth telescopic device and the sixth telescopic device respectively drive the second push plate and the third push plate installed at the drive end to move towards each other or away from each other, thereby clamping or releasing the bracket located at the welding station; the seventh telescopic device is vertically installed below the workbench, and the seventh telescopic device is adapted to drive the second insert rod installed at the drive end to extend into the through hole of the bracket located at the welding station during the welding process.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] The feeding system automatically feeds the brackets and nuts, while a centering rotation mechanism aligns the nuts with the holes in the brackets, enabling the welding device to accurately weld the nuts. Compared to traditional methods, this application achieves a fully automated welding process for guide rail brackets, thereby effectively improving the welding efficiency and quality of the guide rail brackets. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the combined structure of the bracket and nut that make up the guide rail bracket in this application.

[0018] Figure 2 This is a schematic diagram of the guide rail bracket in this application.

[0019] Figure 3 This is a schematic diagram of the overall structure of this application.

[0020] Figure 4 This is a schematic diagram of the cooperation structure between the feeding system and the positioning mechanism and the worktable in this application.

[0021] Figure 5 This is a schematic diagram of the workbench structure in this application.

[0022] Figure 6 This is a schematic diagram of the cooperation structure between the feeding system and the workbench in this application.

[0023] Figure 7 This is a schematic diagram of the structure of the first material pushing mechanism in this application.

[0024] Figure 8 This is a partial schematic diagram of the first material pushing mechanism in this application when it begins to push material.

[0025] Figure 9 This is a partial schematic diagram of the first pushing mechanism in this application completing the pushing process.

[0026] Figure 10 This is a schematic diagram of the structure of the second pusher mechanism in this application.

[0027] Figure 11 This is a schematic diagram showing the position of the nut when it is placed on the bracket in this application.

[0028] Figure 12 This is a schematic diagram of the centering and rotating mechanism in this application.

[0029] Figure 13 This is a schematic diagram showing the disassembled state of the gathering component and the second rotating device in this application.

[0030] Figure 14 This is a schematic diagram of the structure of the collapsing block in this application when it is fully collapsed.

[0031] Figure 15 This is a schematic diagram showing the exploded state of the guide plate in this application.

[0032] Figure 16 This is a schematic diagram showing the state of the retractable component when the retractable opening is open in this application.

[0033] Figure 17 This is a schematic diagram showing the state when the closing component in this application closes the closing opening.

[0034] Figure 18 This is a partial cross-sectional view of the folding component in this application.

[0035] Figure 19 This is a schematic diagram of the installation structure of the positioning mechanism and the worktable in this application.

[0036] In the diagram: guide rail bracket 100, bracket 110, mounting part 111, flange 113, through hole 112, nut 120, center hole 121, welding part 122, worktable 2, first limiting plate 21, first feeding port 211, second feeding port 212, second limiting plate 22, feeding station 210, welding station 220, clearance groove 221, feeding system 3, first feeding device 31, second feeding device 32, first pushing mechanism 33, first telescopic device 331, first mounting plate 3311, first rotating device 332, first push plate 3321, second pushing mechanism 34, second telescopic device 341, second mounting plate 3411, third telescopic device 342, first insert rod 3421, first stop device 35, second stop device 36, centering rotation Mechanism 4, Fourth telescopic device 41, Connecting frame 42, Connecting seat 421, Support seat 422, Clutch groove 4220, Connecting plate 423, Second rotating device 43, Gathering assembly 44, Gathering block 441, Gathering opening 4410, Traction seat 4411, Guide pin 4412, Traction block 4413, Traction plate 442, Traction groove 4420, Extension frame 4421, Guide plate 443, Guide groove 4430, Guide sleeve 4431, Mounting sleeve 4432, First spring 444, Pressure block 445, Pressure rod 4451, Clutch block 446, Second spring 447, Positioning mechanism 5, Fifth telescopic device 51, Second push plate 511, Sixth telescopic device 52, Third push plate 521, Seventh telescopic device 53, Second insertion rod 531, Welding device 6, Frame 700. Detailed Implementation

[0037] The present application will now be further described in conjunction with specific embodiments. It should be noted that, in the description of this specification, the use of terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0038] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and 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 should not be construed as limiting the specific protection scope of this application.

[0039] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being 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 includes the first feature being 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.

[0042] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0043] One preferred embodiment of this application, such as Figure 3As shown, an automatic welding nut device for guide rail brackets includes a worktable 2 mounted on a frame 700, a feeding system 3, a positioning mechanism 5, a centering rotation mechanism 4, and a welding device 6. Welding stations 220 and feeding stations 210 are spaced apart on the worktable 2. The feeding system 3 is mounted on the side of the worktable 2 to transport the guide rail brackets 100 to be welded to the feeding station 210 and push them one by one to the welding station 220. The positioning mechanism 5 is located on the side of the welding station 220 to position the brackets 110 during the welding process; the centering rotation mechanism 4 is located on the upper part of the welding station 220, and the welding device 6 is located on the side of the welding station 220.

[0044] The entire welding process includes a first process and a second process. In the first process, the positioning mechanism 5 first positions and clamps the bracket 110 in the guide rail bracket 100 to be welded in the welding station 220. Then, the centering rotation mechanism 4 drives the nut 120 in the guide rail bracket 100 to be welded to align with the through hole 112 of the bracket 110. At this time, the nut 120 not only has its center hole 121 coincide with the axis of the through hole 112 of the bracket 110, but also its side is parallel to the flange 113 on the side of the bracket 110. Finally, the welding device 6 welds the two welding parts 122 of the nut 120 parallel to the side wall of the flange 113 on the bracket 110.

[0045] The second process: After completing the first process, the positioning mechanism 5 can first release the clamp on the bracket 110. During this process, the welded part 122 of the nut 120 can be fixed to the mounting part 111 of the bracket 110 after a certain period of cooling. Then, the centering rotation mechanism 4 can keep the nut 120 aligned with the through hole 112 and drive the nut 120 to rotate the guide rail bracket 100 180°, thereby aligning the two unwelded welded parts 122 with the welding device 6. Then, the welding device 6 can weld the remaining two welded parts 122 of the nut 120 in the guide rail bracket 100.

[0046] Compared to traditional methods, this application uses a feeding system 3 to automatically feed the bracket 110 and nut 120, and a centering rotation mechanism 4 to align the nut 120 with the through hole 112 of the bracket 110, so that the welding device 6 can accurately weld the nut 120. Thus, while achieving fully automatic welding of the guide rail bracket 100, it can also effectively improve the welding efficiency and welding quality of the guide rail bracket 100.

[0047] It should be understood that the workbench 2, feeding system 3, positioning mechanism 5, centering rotation mechanism 4, and welding device 6 can be installed on a unified frame 700, or multiple frames 700 can be provided, with different functional components installed on different frames 700. For example... Figure 3As shown, due to the obstruction of the centering rotation mechanism 4, the welding device 6 can only extend the welding head to the welding part 122 of the nut 120 in an inclined posture for welding. The specific structure and working principle of the welding device 6 are well known to those skilled in the art. The welding device 6 can be equipped with two welding heads to weld two welding parts 122 simultaneously, or it can be equipped with one welding head, which moves to achieve sequential welding of two welding parts 122 on the same side; the specific welding head configuration can be selected according to actual needs.

[0048] In this embodiment, as Figures 4 to 6 As shown, a first limiting plate 21 and a second limiting plate 22 are arranged in parallel on the workbench 2, with the first limiting plate 21 and the second limiting plate 22 spaced apart to form a loading station 210; the loading station 210 extends towards the welding station 220. A first loading port 211 is formed at the end of the loading station 210 away from the welding station 220. The second limiting plate 22 is divided into two spaced segments, and the spaced area between the two segments of the second limiting plate 22 on one side of the middle of the loading station 210 forms a second loading port 212. The loading system 3 includes a first loading device 31, a second loading device 32, a first pushing mechanism 33, and a second pushing mechanism 34. The loading end of the first loading device 31 is connected to the first loading port 211 to convey the bracket 110 towards the loading station 210. The loading end of the second loading device 32 is connected to the second loading port 212 to convey the nut 120 towards the loading station 210. The second pushing mechanism 34 is installed at the feeding end of the second feeding device 32 and is used to push the nuts 120 conveyed by the second feeding device 32 to the mounting part 111 of the bracket 110 in sequence. The first pushing mechanism 33 is installed on the workbench 2 and its driving end is located at the end of the feeding station 210 near the welding part 122, and is used to push the bracket 110 with nuts 120 placed on it to the welding station 220 in sequence.

[0049] It is understood that both the first feeding device 31 and the second feeding device 32 use vibrating feeding trays. Their specific structures and working principles are well-known to those skilled in the art and will not be described in detail here. Since the guide rail bracket 100 needs to rotate 180° around the axis of the through hole 112 during the second process, and the center of the through hole 112 is offset from the structural center of the bracket 110 in the top view, it is necessary to ensure that the welding station 220 has sufficient range for the bracket 110 to rotate. That is, a gap needs to be maintained between the welding station 220 and the feeding station 210. However, in the feeding station 210, multiple brackets 110 are in close contact. Therefore, in order to ensure that the guide rail bracket 100 in the welding station 220 can be welded smoothly, the brackets 110 with nuts 120 placed in the feeding station 210 need to be sent to the welding station 220 one by one.

[0050] Meanwhile, during the welding of the guide rail bracket 100, the bracket 110 and nut 120 on the loading station 210 need to be stopped from being conveyed to ensure that they do not interfere with the welding of the guide rail bracket 100 in the welding station 220. There are several ways to stop the conveying of the bracket 110 and nut 120. It can be that the first loading device 31 and the second loading device 32 are stopped directly, or an additional pause device can be set up to pause the conveying process of the bracket 110 and nut 120.

[0051] It should be understood that, since stopping the feeding of the bracket 110 and nut 120 is achieved by stopping the first feeding device 31 and the second feeding device 32, the first feeding device 31 and the second feeding device 32 need to be started and stopped once during the welding process of each guide rail bracket 100. Since the starting load of the first feeding device 31 and the second feeding device 32 is large, frequent starting and stopping may cause the first feeding device 31 and the second feeding device 32 to malfunction; therefore, in this embodiment, it is preferable to set an additional pausing device to pause the feeding of the bracket 110 and nut 120.

[0052] Specifically, such as Figure 4 and Figure 6 As shown, the feeding system 3 also includes a first cut-off device 35 and a second cut-off device 36. The first cut-off device 35 is installed at the feeding end of the second feeding device 32 and can stop the nut 120 being conveyed by the feeding end of the second feeding device 32. The second cut-off device 36 is installed on the workbench 2 and located on one side of the feeding station 210. The second cut-off device 36 can stop the support 110 being conveyed in the feeding station 210.

[0053] It should be understood that the first cut-off device 35 and the second cut-off device 36 only obstruct the movement of the nut 120 and the bracket 110, which prevents the feeding ends of the first feeding device 31 and the second feeding device 32 from continuing to fill after filling the corresponding bracket 110 and nut 120, but the first feeding device 31 and the second feeding device 32 can continue to work.

[0054] Specifically, there are several ways to install the first pushing mechanism 33. For ease of understanding, a specific example will be used below for detailed explanation. Figures 7 to 9 As shown, the first feeding mechanism 33 includes a first telescopic device 331 and a first rotating device 332. The first telescopic device 331 is fixedly mounted on the worktable 2, and a first mounting plate 3311 is installed on the drive end of the first telescopic device 331. The first rotating device 332 can be fixedly mounted on the first mounting plate 3311, and a first push plate 3321 is installed on the drive end of the first rotating device 332. When it is necessary to feed materials to the welding station 220, such as... Figure 8As shown, the first push plate 3321 can move away from the bracket 110 under the rotational drive of the first rotating device 332, and the rotation plane of the first push plate 3321 is perpendicular to the movement path of the bracket 110. Then, the bracket 110 with the nut 120 placed on it can move towards the welding station 220 under the drive of the first feeding device 31 until the rotation plane of the first push plate 3321 is between the two brackets 110 closest to the welding station 220. Then, the first push plate 3321 can rotate between the two brackets 110 under the rotational drive of the first rotating device 332. Then, as... Figure 9 As shown, the first telescopic device 331 drives the first mounting plate 3311 to drive the first rotating device 332 to move parallel to the direction of the loading station 210, and then the first push plate 3321 can push the bracket 110 closest to the welding station 220 to the welding station 220.

[0055] It should be noted that during the process of the first push plate 3321 pushing the bracket 110 containing the nut 120 to move towards the welding station 220, the second cut-off device 36 can stop the bracket 110 in the loading station 210. Since the bracket 110 is stopped, the first cut-off device 35 also needs to stop the nut 120 to prevent multiple nuts 120 from being placed on the same bracket 110.

[0056] It is understood that the specific structures and working principles of the first telescopic device 331, the first rotating device 332, the first shut-off device 35, and the second shut-off device 36 are well known to those skilled in the art. Common first telescopic devices 331 include cylinders, hydraulic cylinders, and linear motors, etc., and in this embodiment, a cylinder is preferred. Common first rotating devices 332 include motors, rotary cylinders, and rotary hydraulic cylinders, and in this embodiment, a motor is preferred. Common first shut-off devices 35 and second shut-off devices 36 employ cylinders, hydraulic cylinders, and linear motors, etc., and in this embodiment, a cylinder is preferred.

[0057] Specifically, the workbench 2 has an opening slot (not shown) in the middle of the loading station 210. The second cut-off device 36 is fixedly installed on the lower part of the workbench 2 and corresponds to the opening slot through the insertion rod (not shown) at the drive end. When it is necessary to pause the support 110, the second cut-off device 36 can drive the insertion rod through the opening slot and insert it into the through hole 112 on the support 110 to achieve the stop. Correspondingly, since the upper part of the loading end of the second loading device 32 is an open structure, the first cut-off device 35 can be fixedly installed on the upper part of the loading end of the second loading device 32 with the insertion rod at the drive end facing downward. When the support 110 is paused, the first cut-off device 35 can drive the insertion rod to insert it into the center hole 121 of the nut 120 at the corresponding position to achieve the stop.

[0058] Specifically, there are several ways to install the second pushing mechanism 34. For ease of understanding, a specific example will be used below for detailed explanation. Figure 10 As shown, the second pushing mechanism 34 includes a second telescopic device 341 and a third telescopic device 342. The second telescopic device 341 is horizontally fixedly installed at the lower part of the feeding end of the second feeding device 32, and a second mounting plate 3411 is fixedly installed on the driving end of the second telescopic device 341. The third telescopic device 342 is vertically installed on the second mounting plate 3411, and a first insert rod 3421 is installed on the upward-facing driving end of the third telescopic device 342. The installation position of the second pushing mechanism 34 is closer to the feeding station 210 relative to the first stop device 35. When it is necessary to place the nut 120 on the bracket 110, the first cut-off device 35 first stops the nut 120, and then the third telescopic device 342 drives the first insertion rod 3421 to insert upward into the center hole 121 of the second nut 120 of the two nuts 120 closest to the loading station 210. Then the second telescopic device 341 drives the second mounting plate 3411 to drive the third telescopic device 342 to push the nut 120 closest to the loading station 210 onto the bracket 110 of the loading station 210 through the first insertion rod 3421.

[0059] It is understood that the specific structure and working principle of the second telescopic device 341 and the third telescopic device 342 are well-known technologies to those skilled in the art, and therefore will not be described in detail here. Common second telescopic devices 341 and third telescopic devices 342 include cylinders, hydraulic cylinders, and linear motors, and cylinders are preferred in this embodiment. The specific structure of the third telescopic device 342 is basically the same as that of the first stop device 35 and the second stop device 36. It should be noted that in order to ensure that the first insertion rod 3421 at the driving end of the third telescopic device 342 can be smoothly inserted into the center hole 121 of the nut 120 and drive the nut 120 to move, the bottom of the feeding end of the second feeding device 32 is provided with an opening groove along the extension direction for the first insertion rod 3421 to pass through.

[0060] It should be understood that when the nut 120 is conveyed onto the bracket 110, the center hole 121 of the nut 120 is not aligned with the through hole 112 on the bracket 110. Furthermore, during the process of conveying the bracket 110 containing the nut 120 to the welding station 220, the nut 120 may move relative to the bracket 110, causing the position of the nut 120 on the bracket 110 to deviate from the through hole 112 on the mounting portion 111; one example of the position of the nut 120 on the mounting portion 111 of the bracket 110 is as follows... Figure 11As shown in (1). Therefore, in the subsequent welding process, the nut 120 needs to be driven from a position offset from the through hole 112 to a position where the center hole 121 aligns with the through hole 112 by the centering rotation mechanism 4, and the side of the nut 120 is parallel to the flange 113 on the side of the mounting part 111, that is, as shown in (1). Figure 11 As shown in (2).

[0061] In this embodiment, there are various specific structures for the centering rotation mechanism 4 that can achieve the above-mentioned functions. For ease of understanding, one specific structure will be described in detail below. Figure 12 and Figure 13 As shown, the centering rotation mechanism 4 includes a fourth telescopic device 41, a second rotating device 43, and a retracting assembly 44. The fourth telescopic device 41 is vertically fixed to the frame 700, the second rotating device 43 is vertically arranged and installed at the output end of the fourth telescopic device 41, and the retracting assembly 44 is installed at the output end of the second rotating device 43; the end of the retracting assembly 44 forms a retracting opening 4410 for centering and clamping the nut 120, and the center of the retracting opening 4410 is aligned with the through hole 112 on the bracket 110.

[0062] Initially, in order to ensure that the bracket 110 with nut 120 placed thereon, i.e. the guide rail bracket 100 to be welded, can smoothly enter the welding station 220, the fourth telescopic device 41 can drive the second rotating device 43 to drive the retracting component 44 to move vertically upward; at the same time, the second rotating device 43 can drive the retracting component 44 to open the retracting opening 4410 until the opening size is larger than the cross-sectional size of nut 120.

[0063] During the first process, the fourth telescopic device 41 first causes the second rotating device 43 to move the retracting assembly 44 downward until the height of the port is lower than the upper end face of the nut 120, so that the nut 120 falls into the retracting opening 4410, whose opening size is larger than the cross-sectional size of the nut 120. Then, driven by the second rotating device 43, the retracting assembly 44 retracts the retracting opening 4410. During the retracting process, the nut 120 can be driven to move towards the through hole 112 of the mounting part 111 until the center hole 121 of the nut 120 is aligned with the through hole 112. After the first process is completed, during the second process, the second rotating device 43 can drive the retracting assembly 44 to maintain the retraction of the nut 120 and drive the partially welded guide rail bracket 100 to rotate 180°.

[0064] It is understood that the specific structure and working principle of the fourth telescopic device 41 and the second rotating device 43 are well known to those skilled in the art, and therefore will not be described in detail here. Common fourth telescopic devices 41 include cylinders, hydraulic cylinders and linear motors, etc., and cylinders are preferred in this embodiment. Common second rotating devices 43 include motors, rotary cylinders and rotary hydraulic cylinders, and motors are preferred in this embodiment.

[0065] In this embodiment, the specific structure of the retracting component 44 that can achieve the above-mentioned functions can be varied. For ease of understanding, one of the structures will be described in detail below. Figures 13 to 17 As shown, the second rotating device 43 is mounted to the output end of the fourth telescopic device 41 via a connecting frame 42; the retracting assembly 44 includes a traction plate 442, a guide plate 443, and four retracting blocks 441. The four retracting blocks 441 are arranged around each other to form a retracting opening 4410. The connecting frame 42 extends to the output end of the second rotating device 43 and engages with the guide plate 443 via a clutch structure. The retracting blocks 441 and the guide plate 443 are engaged via a guide structure, and the traction plate 442 is connected to the output end of the second rotating device 43 and engages with the retracting blocks 441 via a traction structure.

[0066] During the first process, the traction plate 442 rotates under the drive of the second rotating device 43. At this time, the guide plate 443 remains stationary under the constraint of the clutch structure, meaning the clutch structure is engaged. Consequently, the gathering block 441 gradually gathers together through the traction and guide structures until the cross-section of the gathering opening 4410 is a square corresponding to the cross-sectional dimensions of the nut 120. During the second process, the gathering block 441 maintains its clamping hold on the nut 120. At this time, the traction plate 442, driven by the second rotating device 43, causes the guide plate 443 to disengage from the clutch structure and rotate synchronously by 180°, meaning the clutch structure is in a free state.

[0067] Specifically, such as Figures 14 to 17As shown, the four gathering blocks 441 can be gathered into a columnar structure. Each gathering block 441 is fan-shaped, and its inner end has a flat gathering surface. The four gathering blocks 441 form a square-section gathering opening 4410 through the gathering surface. Each gathering block 441 has a radially extending traction seat 4411 at its upper end. The upper end of the traction seat 4411 has a circular cross-section guide pin 4412, and the lower end of the traction seat 4411 has a rectangular cross-section traction block 4413. A guide plate 443 is located above the traction seat 4411. The guide plate 443 has four guide grooves 4430 evenly distributed along the circumference. The guide grooves 4430 cooperate with the corresponding guide pins 4412 to form a guiding structure. The traction plate 442 is arranged in a ring below the traction seat 4411. The traction seat 4411 is provided with four traction grooves 4420 evenly distributed along the circumference. The traction grooves 4420 cooperate with the corresponding traction blocks 4413 to form a traction structure. The extension directions of the traction grooves 4420 and the guide grooves 4430 are not parallel.

[0068] To facilitate understanding, the specific working process of the collapsing component 44 will be described in detail below.

[0069] Initially, such as Figure 16 As shown, the convergence opening 4410 formed by the four convergence blocks 441 is in the open state. At this time, the traction block 4413 is located in the middle or the first end of the traction groove 4420, and the guide pin 4412 is located in the middle or the first end of the guide groove 4430.

[0070] When performing the first process, such as Figure 16 and Figure 17 As shown, the traction plate 442 rotates in the first direction under the drive of the second rotating device 43, so as to... Figure 17 For example, the first direction is clockwise. During this process, the guide plate 443 is stationary under the engagement of the clutch structure, then the traction block 4413 slides relative to the second end along the traction groove 4420, while the guide pin 4412 slides relative to the second end along the guide groove 4430; until... Figure 17 As shown, the traction block 4413 is located at the second end of the traction groove 4420, and the guide pin 4412 is located at the second end of the guide groove 4430. At this time, the closing opening 4410 closes into a square cross section and aligns and clamps the nut 120 so that the welding device 6 can perform the first welding on the nut 120.

[0071] After the first process is completed, the traction plate 442 continues to rotate in the first direction under the drive of the second rotating device 43. At this time, since the traction block 4413 is located at the second end of the traction groove 4420 and the guide pin 4412 is located at the second end of the guide groove 4430, the traction block 4413 and the guide pin 4412 cannot continue to slide relative to each other. This allows the driving force of the traction plate 442 from the second rotating device 43 to be transmitted to the guide plate 443, thereby contacting the clutch structure's restriction on the guide plate 443. This allows the guide plate 443 to rotate 180° with the traction plate 442 and the gathering block 441, which in turn drives the partially welded guide rail bracket 100 to rotate, so that the welding device 6 can perform a second welding on the nut 120.

[0072] Understandably, since the traction plate 442 is installed below the guide plate 443, and the traction plate 442 needs to be driven by the second rotating device 43, then... Figure 13 As shown, an extension frame 4421 can be provided on the side of the traction plate 442. One end of the extension frame 4421 is connected to the traction plate 442, and the other end extends to the top of the guide plate 443 to be driven by the second rotating device 43.

[0073] Specifically, to facilitate the design of the clutch mechanism, such as Figure 13 As shown, the connecting frame 42 includes a connecting seat 421, a support seat 422 and multiple connecting plates 423; the connecting seat 421 is fixedly installed at the output end of the fourth telescopic device 41, the support seat 422 is annular and located at the output end of the second rotating device 43 and is connected to the guide plate 443 through a clutch structure, and the support seat 422 and the connecting seat 421 are connected by multiple connecting plates 423.

[0074] Specifically, such as Figure 15 and Figure 18 As shown, the support base 422 is located above the guide plate 443, and the guide plate 443 has an axially extending mounting sleeve 4432 on its end face near the support base 422. The clutch structure includes a clutch block 446, a second spring 447, and a clutch groove 4220. The clutch block 446 is elastically slidably mounted in the mounting sleeve 4432 by the second spring 447, and the clutch groove 4220 is located on the support base 422. When the clutch block 446 engages with the clutch groove 4220 under the elastic force of the second spring 447, the guide plate 443 is restricted, and the clutch structure is in an engaged state; when the clutch block 446 passes over the clutch groove 4220 under the drive of the traction plate 442, the restriction of the guide plate 443 is released, and the clutch structure is in a free state.

[0075] It should be noted that the clutch groove 4220 is an arc-shaped groove, and the clutch block 446 is at least arc-shaped at the position where it mates with the clutch groove 4220. The clutch block 446 can be a column with a hemispherical front end or a sphere.

[0076] It should be noted that the mounting sleeve 4432 may interfere with the extension frame 4421, affecting the rotation of the traction plate 442. Therefore, the specific number of extension frames 4421 installed on the traction plate 442 can be set according to the angle at which the traction plate 442 needs to rotate in the first process. Figure 16 and Figure 17 As shown, during the first process, the traction plate 442 will rotate from position A to position B. If the central angle between A and B is less than 90°, then the maximum number of extension frames 4421 can be four. In this case, the installation position of the mounting sleeve 4432 only needs to ensure that it does not interfere with the rotation of the traction plate 442. For example, if the central angle between A and B is 45°, and the number of extension frames 4421 is four, then when setting the mounting sleeve 4432, it is sufficient to ensure that the angle between the mounting sleeve 4432 and the extension frame 4421 in the opposite direction is greater than 45°.

[0077] Understandably, to ensure the stability of the guide plate 443 under the constraint of the clutch structure during the first process, the support base 422 and the guide plate 443 are engaged by multiple clutch structures arranged at equal intervals along the circumference. If the number of clutch structures is greater than two, the distance from the location of each clutch structure to the center of the guide plate 443 will be different.

[0078] It should be understood that, based on the clutch structure, after welding the current guide rail bracket 100, the retractable opening 4410 needs to be reopened to facilitate welding the next guide rail bracket 100. This reopening can be achieved by the retractable block 441 rotating 180° along the first direction to its initial position under the drive of the guide and traction structures. At this point, the guide plate 443 will be restricted again by the clutch structure, and then the second rotating device 43 will rotate at an angle in a second direction opposite to the first direction to open the retractable opening 4410. This reopening method creates an idle stroke, thus reducing the welding efficiency of the guide rail bracket 100. Therefore, the reopening method of the retractable opening 4410 can be optimized by improving the arrangement of the clutch structure.

[0079] Specifically, each clutch structure corresponds to two clutch slots 4220, which are spaced 180° apart along the circumference of the support base 422. During the welding process, the traction plate 442 rotates continuously in the first direction. In the first process, the clutch block 446 engages with one of the clutch slots 4220. In the second process, the clutch block 446 rotates 180° along the first direction with the guide plate 443 and then engages with the other clutch slot 4220; that is, the guide plate 443 is again restricted at this time. After the welding process is completed, the traction plate 442 can rotate a set angle in the second direction opposite to the first direction, causing the retracting block 441 to gradually open from the retracted state. At this time, the guide plate 443 remains stationary under the action of the clutch structure.

[0080] In this embodiment, as Figure 13 , Figure 15 and Figure 18 As shown, a guide sleeve 4431 extends axially from the lower center of the guide plate 443; the retracting assembly 44 also includes a pressure block 445 and a first spring 444 located within the retracting opening 4410. The pressure block 445 is axially slidably connected to the guide sleeve 4431 via a pressure rod 4451. The first spring 444 is sleeved on the pressure rod 4451 and connected to both the pressure block 445 and the guide sleeve 4431; or the first spring 444 is located within the guide sleeve 4431 and connected to both the guide sleeve 4431 and the pressure rod 4451, so that the pressure block 445 and the guide plate 443 are axially elastically slidably connected. The cross-sectional dimension of the pressure block 445 is slightly smaller than the cross-sectional dimension of the retracting opening 4410 when it is in the retracted state, so that during the welding process, the pressure block 445 can apply pressure to the nut 120 under the action of the first spring 444, thereby improving the welding quality between the nut 120 and the bracket 110.

[0081] It should be noted that the opening size of the retractable opening 4410 is limited by the dimensions between the retractable block 441 and the bracket 110 and cannot cover the entire mounting portion 111. When the guide rail bracket 100 to be welded is fed to the welding station 220, the nut 120 may be close to the side of the mounting portion 111 of the bracket 110, that is, the nut 120 may be located outside the coverage area of ​​the open retractable opening 4410. Therefore, during the welding process, the nut 120 needs to be pre-positioned so that the nut 120 is within the coverage area of ​​the retractable opening 4410 to facilitate the subsequent welding process.

[0082] There are several ways to adjust the position of the nut 120 before welding. For ease of understanding, one method will be described in detail below. Specifically, an electromagnet can be installed inside the pressure block 445. Before the first process, the electromagnet uses the magnetic force generated by being energized to attract the nut 120 to the center near the closing opening 4410. During the welding process, the electromagnet can remain de-energized.

[0083] In this embodiment, in order to ensure the welding position of the guide rail bracket 100, the nut 120 and the bracket 110 need to be positioned and clamped at the welding station 220. The nut 120 is positioned and pressed by the above-mentioned centering rotation mechanism 4; the bracket 110 is positioned and pressed by the positioning mechanism 5. There are various specific structures of the positioning mechanism 5. For ease of understanding, one specific structure will be described in detail below.

[0084] Specifically, such as Figure 4 and Figure 19 As shown, the positioning mechanism 5 includes a fifth telescopic device 51, a sixth telescopic device 52, and a seventh telescopic device 53. The fifth telescopic device 51 and the sixth telescopic device 52 are horizontally arranged opposite each other on both sides of the welding station 220. The fifth telescopic device 51 and the sixth telescopic device 52 respectively drive the second push plate 511 and the third push plate 521 installed at the drive end to move towards each other or away from each other, thereby clamping or releasing the bracket 110 located at the welding station 220. The seventh telescopic device 53 is vertically installed below the workbench 2. The seventh telescopic device 53 can drive the second insert rod 531 installed at the drive end to extend into the through hole 112 of the bracket 110 located at the welding station 220 during the welding process.

[0085] It is understood that during the first process, the fifth telescopic device 51 and the sixth telescopic device 52 respectively drive the second push plate 511 and the third push plate 521 to move in opposite directions, thereby clamping the bracket 110 located at the welding station 220; at the same time, the seventh telescopic device 53 can drive the second insertion rod 531 to insert into the through hole 112 of the bracket 110 to achieve positioning. During the second process, the second insertion rod 531 can also position the rotation of the guide rail bracket 100. The specific structure and working principle of the fifth telescopic device 51, the sixth telescopic device 52 and the seventh telescopic device 53 are well known to those skilled in the art, and therefore will not be described in detail here. Common fifth telescopic devices 51, the sixth telescopic device 52 and the seventh telescopic device 53 include cylinders, hydraulic cylinders and linear motors, etc. In this embodiment, cylinders are preferred. In order to facilitate the smooth insertion of the second insertion rod 531 into the through hole 112 on the bracket 110, such as Figure 5As shown, the workbench 2 is provided with a clearance groove 221 at the welding station 220 position, and the second insertion rod 531 can pass through the clearance groove 221 and be inserted into the through hole 112 on the bracket 110.

[0086] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. An automatic welding nut device for a guide rail bracket, characterized in that, include: The workbench is provided with welding stations and material loading stations spaced apart. A feeding system; the feeding system is installed on the side of the workbench to transport the guide rail brackets to be welded to the feeding station and push them one by one to the welding station; A positioning mechanism; the positioning mechanism is disposed on the side of the welding station for positioning the support during the welding process; A centering rotation mechanism; the centering rotation mechanism is disposed above the welding station; as well as Welding equipment; The welding device is located on the side of the welding station; The welding process includes a first process and a second process; In the first process, the centering rotation mechanism drives the nut in the guide rail bracket to be welded to align with the through hole of the bracket. At this time, the welding device welds the two welding parts of the side wall of the bracket with the nut parallel to the flange. The second process: The centering rotation mechanism keeps the nut aligned with the through hole and drives the guide rail bracket to rotate 180° by driving the nut; then the welding device welds the remaining two welding parts of the nut in the guide rail bracket. The centering rotation mechanism includes: The fourth telescopic device; the fourth telescopic device is fixedly installed; The second rotating device; the second rotating device is connected to the output end of the fourth telescopic device; and A retractable assembly; the retractable assembly is mounted on the output end of the second rotating device, and the fourth telescopic device is adapted to drive the retractable assembly to move axially; the end of the retractable assembly forms a retractable opening for centering and clamping the nut, and the center of the retractable opening is aligned with the through hole on the bracket. During the first process, the nut falls into the closing opening, the size of which is larger than the cross-sectional size of the nut. Then, the closing assembly is driven by the second rotating device to close and align the nut with the through hole. During the second process, the retracting assembly maintains the retraction of the nut and, driven by the second rotating device, drives the guide rail bracket to rotate 180°. The second rotating device is mounted to the output end of the fourth telescopic device via a connecting frame; the retracting assembly includes: Four gathering blocks; the four gathering blocks are arranged in a surrounding manner to form the gathering opening; Guide plate; the connecting frame extends to the output end of the second rotating device and engages with the guide plate via a clutch structure; the gathering block engages with the guide plate via a guide structure; and A traction plate; the traction plate is connected to the output end of the second rotating device and cooperates with the gathering block through a traction structure; During the first process, the traction plate rotates under the drive of the second rotating device. At this time, the guide plate remains stationary under the restriction of the clutch structure. Then, the gathering block gradually gathers together through the traction structure and the guide structure until the cross-section of the gathering opening is a square corresponding to the cross-sectional size of the nut. During the second process, the retracting block maintains the retracting clamp on the nut. At this time, the traction plate, driven by the second rotating device, drives the guide plate to disengage from the restriction of the clutch structure and rotate synchronously by 180°.

2. The automatic welding nut device for guide rail bracket as described in claim 1, characterized in that, The upper end of the gathering block is provided with a radially extending traction seat, the upper end face of the traction seat is provided with a guide pin with a circular cross-section, and the lower end face of the traction seat is provided with a traction block with a rectangular cross-section. The guide plate is disposed above the traction seat, and the guide plate is provided with four guide grooves evenly distributed along the circumference. The guide grooves cooperate with the corresponding guide pins to form the guide structure. The traction plate is disposed below the traction seat, and the traction seat is provided with four traction grooves evenly distributed along the circumference. The traction grooves cooperate with the corresponding traction blocks to form the traction structure. The traction groove and the guide groove do not extend in parallel directions.

3. The automatic welding nut device for guide rail bracket as described in claim 1, characterized in that, The connecting frame is provided with a support base at the output end of the second rotating device, and the support base is located above the guide plate; The clutch structure includes a clutch block, a second spring, and a clutch groove; the clutch block is elastically slidably mounted along the axial direction of the guide plate via the second spring, and the clutch groove is disposed on the support base; When the clutch block engages with the clutch groove under the elastic force of the second spring, the guide plate is restricted; When the clutch block passes the clutch groove under the drive of the traction plate, the restriction of the guide plate is released.

4. The automatic welding nut device for guide rail bracket as described in claim 3, characterized in that, The support base and the guide plate are engaged by a plurality of clutch structures arranged along the circumferential direction, and the distance from the center of the guide plate to the location of each clutch structure is different; The clutch structure has two clutch slots, and the two clutch slots are set at a 180° interval along the circumferential direction of the support base. During the welding process, the traction plate always rotates along the first direction; wherein, during the first process, the clutch block engages with one of the clutch slots, and during the second process, the clutch block rotates 180° along the first direction with the guide plate and then engages with the other clutch slot; After the welding process is completed, the traction plate rotates in a second direction opposite to the first direction, so that the gathering block gradually opens from the gathered state. At this time, the guide plate remains stationary under the action of the clutch structure.

5. The automatic welding nut device for guide rail bracket as described in claim 1, characterized in that, The retracting assembly further includes a pressure block located within the retracting opening, the pressure block being axially elastically slidably mounted on the guide plate; the pressure block is adapted to apply pressure to the nut against the bracket during the welding process; The pressure block is also equipped with an electromagnet, which is adapted to attract the nut to the center of the closing opening by the magnetic force generated by energizing it before the first process; the electromagnet is adapted to remain de-energized during the welding process.

6. The automatic welding nut device for guide rail brackets as described in any one of claims 1-5, characterized in that, The workbench is formed by the cooperation of a first limiting plate and a second limiting plate arranged in parallel, and the extension direction of the loading station is toward the welding station. The feeding system includes: A first feeding device; the feeding end of the first feeding device is connected to the end of the feeding station away from the welding station and conveys the bracket to the feeding station; The second feeding device; the feeding end of the second feeding device is connected to one side of the middle of the feeding station and feeds nuts to the feeding station; A second pushing mechanism; the second pushing mechanism is installed at the feeding end of the second feeding device, and is used to sequentially push the nuts conveyed by the second feeding device to the mounting part of the bracket; and The first pushing mechanism is installed on the workbench and its drive end is located at the end of the loading station near the welding part, and is used to push the bracket with the nut in place to the welding station in sequence.

7. The automatic welding nut device for guide rail bracket as described in claim 6, characterized in that, The first pushing mechanism includes a first telescopic device and a first rotating device; the first telescopic device is fixedly installed, and the first rotating device is installed on the drive end of the first telescopic device. The first rotating device is adapted to rotate the first push plate installed on the drive end to the two supports closest to the welding station, and then the first push plate pushes the support closest to the welding station to the welding station under the drive of the first telescopic device. The second pushing mechanism includes a second telescopic device and a third telescopic device; the second telescopic device is horizontally fixed, and the third telescopic device is vertically installed on the drive end of the second telescopic device; the third telescopic device is adapted to insert the first insert rod installed on the drive end into the center hole of the second nut among the two nuts closest to the loading station, and then the first insert rod, driven by the second telescopic device, pushes the nut closest to the loading station onto the bracket of the loading station.

8. The automatic welding nut device for guide rail bracket as described in claim 1, characterized in that, The positioning mechanism includes a fifth telescopic device, a sixth telescopic device, and a seventh telescopic device; The fifth telescopic device and the sixth telescopic device are horizontally arranged opposite each other on both sides of the welding station. The fifth telescopic device and the sixth telescopic device respectively drive the second push plate and the third push plate installed on the drive end to move towards each other or away from each other, thereby clamping or releasing the bracket located at the welding station. The seventh telescopic device is vertically installed below the workbench, and the seventh telescopic device is adapted to drive the second insert rod installed at the drive end to extend into the through hole of the bracket located at the welding station during the welding process.

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