Sheet splicing positioning and centering device and sheet welding special machine

Abstract

The application belongs to the technical field of thin plate splicing welding, and discloses a thin plate splicing positioning centering device and a thin plate welding special machine. The thin plate splicing positioning centering device comprises a mounting seat, a rotary driving cylinder, a rotary seat, a rotary disc, a lifting support, a lifting cylinder, a guide cylinder, a lifting shaft and a positioning blocking arm. The rotary seat is fixedly arranged on the mounting seat, the rotary disc is rotatably arranged in the rotary seat, the cylinder body of the rotary driving cylinder is fixedly arranged on the mounting seat, and the rotary shaft of the rotary driving cylinder is connected with the rotary disc. The lifting support is fixedly arranged on the rotary disc, the guide cylinder is fixedly arranged on the lifting support, the lifting shaft is movably arranged in the guide cylinder along the axial direction of the lifting shaft, and the lifting shaft is coaxially arranged with the rotary shaft. The cylinder body of the lifting cylinder is fixedly arranged on the lifting support, the piston rod of the lifting cylinder is connected with the lifting shaft, and the positioning blocking arm is fixedly arranged on the lifting shaft. The thin plate splicing positioning centering device and the thin plate welding special machine can improve the reliability and accuracy of splicing positioning centering, and improve the operation efficiency.

Description

Technical Field

[0001] This application belongs to the field of thin plate splicing and welding technology, and particularly relates to a thin plate splicing positioning and centering device and a special machine for thin plate welding. Background Technology

[0002] In thin plate splicing welding, two thin steel plates with a thickness of 1-3mm need to be laid flat and butt-welded. Splicing welding is usually automated using specialized thin plate welding machines, and the alignment of the two plates is also automated. Specifically, the two thin plates are moved sequentially to the vicinity of the welding position via conveyor rollers. After the first plate passes the welding position, it reverses and positions itself at the welding point, ensuring the edge to be welded is in the welding position. The second plate moves towards the first plate until its edge to be welded contacts and aligns with the edge to be welded on the first plate, thus completing the automated splicing of the two thin plates. However, during the movement of the first plate, due to its thinness and flexibility, it is prone to slight deviations in posture. This can lead to misalignment and misalignment when the two plates are assembled. The thinner and longer the plates, the higher the frequency of misalignment. This results in welding defects such as incomplete weld filling, incomplete penetration, and weld misalignment, increasing rework and affecting the product's appearance quality.

[0003] Therefore, a method of on-site manual positioning and alignment is usually adopted. This involves on-site operators using tools such as positioning blocks and squares to adjust the position and orientation of the first thin plate, aiming to improve alignment as much as possible. Specifically, by placing the positioning block in the pre-set weld area as a contact mechanism, the thin plate to be welded is positioned and aligned at the pre-set location when its retracted edge comes into contact with the positioning block. However, the weld area is narrow, and the placement error of the positioning block has a significant impact on positioning and alignment. Furthermore, on-site operators must observe and adjust in real time during welding, even adjusting the offset distance between the welding torch and the center of the plate. This not only affects assembly and welding efficiency but also introduces significant errors, impacting production quality. Summary of the Invention

[0004] This application provides a thin plate splicing positioning and alignment device and a special machine for thin plate welding, aiming to at least partially solve the technical problems of unreliable splicing positioning and alignment, the need for manual active correction, large errors, and low efficiency in the automatic splicing and welding process of thin plates. Therefore,

[0005] This application provides a thin plate splicing positioning and centering device, which includes: a mounting base, a rotary drive cylinder, a rotary seat, a rotary table, a lifting bracket, a lifting cylinder, a guide cylinder, a lifting shaft, and a positioning stop arm;

[0006] The rotary seat is fixed on the mounting base, the rotary disk is rotatably disposed in the rotary seat, the cylinder body of the rotary drive cylinder is fixed on the mounting base, and the rotation shaft of the rotary drive cylinder is connected to the rotary disk to drive the rotary disk to rotate in the rotary seat.

[0007] The lifting bracket is fixed on the rotary table, the guide cylinder is fixed on the lifting bracket, and the lifting shaft is movably disposed in the guide cylinder along its axial direction, and the lifting shaft is coaxial with the rotating shaft.

[0008] The cylinder body of the lifting cylinder is fixed on the lifting bracket, and the piston rod of the lifting cylinder is connected to the lifting shaft to push the lifting shaft to slide inside the guide cylinder;

[0009] The positioning arm is fixed on the lifting shaft.

[0010] Furthermore, the thin plate splicing positioning and centering device also includes: a slewing bearing;

[0011] The inner ring of the slewing bearing is fitted onto the slewing disc, and the outer ring of the slewing bearing is fixed inside the slewing seat.

[0012] Furthermore, the rotary seat is provided with a first support platform, and the outer side wall of the rotary table is provided with a second support platform;

[0013] The outer ring of the slewing bearing rests on the first bearing platform and is pressed by a clamping and limiting ring;

[0014] The inner ring of the slewing bearing rests on the second bearing platform.

[0015] Furthermore, a self-lubricating material layer is provided on the two surfaces of the rotary table that are in contact with the rotary seat.

[0016] Furthermore, the guide cylinder includes a cylinder body and a mounting flange disposed on the cylinder body;

[0017] The mounting flange is fixed to the lifting bracket by fasteners.

[0018] Furthermore, a screw hole is provided on the lifting shaft, and the screw hole is coaxially arranged with the lifting shaft;

[0019] The piston rod is screwed into the screw hole.

[0020] Furthermore, the end of the positioning arm away from the lifting shaft has a contact arc surface.

[0021] Furthermore, a positioning through hole is provided at one end of the positioning arm near the lifting shaft, and a positioning boss is provided on the end face of the lifting shaft, the positioning boss being embedded in the positioning through hole.

[0022] Furthermore, the positioning through hole is a countersunk hole, and a clamping member is provided inside the countersunk hole. The clamping member is fixed to the positioning boss by fasteners and presses the positioning stop arm onto the lifting shaft.

[0023] A special machine for welding thin plates includes: the aforementioned thin plate splicing, positioning, and centering device.

[0024] The embodiments of this application have at least the following beneficial effects:

[0025] The thin plate splicing positioning and centering device and thin plate welding machine provided in this application, by setting a rotary drive cylinder and a rotary seat on the mounting base, and rotating a turntable inside the rotary seat, can be driven to rotate by the rotary drive cylinder, thus forming a rotatable mechanism; a lifting bracket is also provided, in which a lifting cylinder and a guide cylinder are set, and a slidable lifting shaft is set inside the guide cylinder, thus moving the lifting shaft by pushing and pulling the lifting cylinder, forming a lifting mechanism; then the lifting bracket is fixed on the turntable, thus forming a rotatable and lifting mechanism based on the mounting base. The integrated structure lowers the positioning arm and connects it to the lifting shaft, enabling the positioning arm to be raised, lowered, and deflected. When the thin plate splicing positioning and centering device is set on the welding machine, it can automatically raise the positioning arm to the corresponding height of the preset weld area with a stable and reliable range of motion according to the set parameters, and deflect the positioning arm to point towards the first thin plate to be spliced, so that the edge of the first thin plate to be welded can be accurately stopped in the preset position. Compared with manual operation of positioning blocks and squares, it can significantly reduce positioning and centering errors, and the operation is efficient and reliable. Meanwhile, considering the narrow welding area of ​​the welding machine and the high precision requirements of the pre-set welding position of the thin plate, in order to ensure proper storage of the thin plate splicing positioning and centering device and the positional accuracy of stopping the first thin plate, a structure with a liftable lifting shaft and a deflectable positioning arm is used. The positioning arm can be raised above the track parallel to the weld length direction through the weld clearance reserved on the roller conveyor of the welding machine, and then deflected to point towards the first thin plate to achieve positioning and stopping. When storing, the positioning arm can be deflected to make it parallel to the weld length direction, and then lowered below the roller conveyor for storage. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1A three-dimensional structural schematic diagram of the thin plate splicing positioning and centering device in an embodiment of this application is shown;

[0028] Figure 2 It shows Figure 1 Front view of the thin plate splicing positioning and centering device in the middle;

[0029] Figure 3 It shows Figure 2 A sectional view along the AA direction of the thin plate splicing positioning and centering device.

[0030] Figure label:

[0031] 100 - Mounting base, 110 - Upper mounting platform, 120 - Mounting bracket, 130 - Lower mounting platform;

[0032] 200 - Rotary drive cylinder; 210 - Rotary shaft;

[0033] 300-Rotary seat, 310-Clamping limit ring, 311-Clamping boss, 320-First bearing platform;

[0034] 400 - Rotary table, 410 - Second support platform;

[0035] 500-Lifting support, 510-Upper support platform, 520-Support body, 530-Lower support platform;

[0036] 600 - Lifting cylinder, 610 - Piston rod;

[0037] 700-Guide cylinder, 710-Mounting flange, 720-Lifting shaft, 730-Clamping component, 740-Locking component;

[0038] 800 - Positioning stop arm, 810 - Contact arc surface;

[0039] 900 - Slewing bearing, 910 - Outer ring, 920 - Inner ring. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0041] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0042] This application is described below with reference to the accompanying drawings and specific embodiments:

[0043] In automated splicing welding using a specialized thin-plate welding machine, the positioning and alignment of the thin plates is crucial. This means ensuring that the two thin plates are in the preset welding positions and that their edges are properly aligned. Typically, during the splicing operation, the first thin plate passes through the preset weld area and then moves back to the preset position to ensure the edge to be welded is in the correct position. The second thin plate then moves towards the first until the edges of the two plates are in contact and aligned. Therefore, the positioning accuracy of the first thin plate plays a vital role in the quality of the splicing positioning and alignment.

[0044] However, in existing splicing and positioning operations, manual intervention is often required. Tools such as positioning blocks and squares are used to position and stop the first thin plate at the preset weld position, and then move it backward to perform auxiliary positioning and centering. The operation accuracy and efficiency are unstable, the randomness is large, and the error and reliability are not ideal.

[0045] Therefore, this application provides a thin plate splicing positioning and centering device, which is installed on a thin plate welding machine and serves as a stop positioning and centering fixture for the first thin plate in the reversing process, so that its edge can stop at a preset position and is compatible with the thin plate structure, thus avoiding interference with the normal splicing and movement process of the thin plate.

[0046] See Figure 1 , Figure 2 and Figure 3 The thin plate splicing positioning and centering device provided in this application embodiment includes: mounting base 100, rotary drive cylinder 200, rotary seat 300, rotary table 400, lifting bracket 500, lifting cylinder 600, guide cylinder 700, lifting shaft 720 and positioning stop arm 800.

[0047] The mounting base 100 serves as the installation foundation for the entire device, supporting other components on one hand and being installed on the site platform or foundation on the other, thereby achieving stable installation and fixation of the entire device.

[0048] The rotary seat 300 is fixed on the mounting base 100, the rotary disk 400 is rotatably disposed within the rotary seat 300, the cylinder body of the rotary drive cylinder 200 is fixed on the mounting base 100, and the rotation shaft 310 of the rotary drive cylinder 300 is connected to the rotary disk 400 to drive the rotary disk 400 to rotate within the rotary seat 300, forming a rotary mechanism based on the mounting base 100.

[0049] The lifting bracket 500 serves as the foundation of the lifting structure, is fixed on the turntable 400, and supports the lifting structure components, thereby enabling the lifting structure to rotate as a whole. The guide cylinder 700 is fixed on the lifting bracket 500, and the lifting shaft 720 is movably disposed within the guide cylinder 700 along its axial direction. The lifting shaft 720 is coaxially arranged with the rotating shaft 310, allowing the lifting shaft 720 to rotate in place and move axially. Generally, the direction of movement of the lifting shaft 720 can be set to vertical lifting and lowering.

[0050] The lifting cylinder 600 serves as a lifting power element, with its cylinder body fixed on the lifting bracket 500. The piston rod 610 of the lifting cylinder 600 is connected to the lifting shaft 720 to push the lifting shaft 720 to slide within the guide cylinder 700. The limiting function of the guide cylinder 700 enables stable and reliable directional movement, restricts other-direction swinging, and resists the impact of thin plates.

[0051] The positioning arm 800, serving as a component that directly contacts and stops the edge of the first thin plate, is fixed on the lifting shaft 720. It rises, falls, and deflects with the lifting shaft 720, thereby being raised above the thin plate moving roller conveyor and deflected to face the edge of the thin plate. Specifically, the stop positioning and centering can be achieved by passing the positioning arm 800 parallel to the weld seam clearance area of ​​the welding machine along the weld seam length direction, and then deflecting it 90 degrees to point towards the edge of the thin plate.

[0052] Generally, the thin plate splicing positioning and centering device can be set below the roller conveyor of the welding machine, and can be specifically set at a certain distance from the preset weld seam area, so as to avoid the influence of high temperature and welding combustion inclusions during the welding process. By adjusting the length of the positioning arm 800, it can be ensured that the edge of the first thin plate can be stopped at the preset welding position; at the same time, it can also prevent the thin plate splicing positioning and centering device from affecting the welding operation.

[0053] The thin plate splicing positioning and centering device provided in this application forms an integrated structure that can rotate and lift by forming a rotatable mechanism and a lifting mechanism located on it. This structure enables the lifting and deflection of the positioning arm. When the thin plate splicing positioning and centering device is set on a welding machine, it can automatically and reliably raise the positioning arm to the corresponding height of the preset weld area according to the set parameters, and deflect the positioning arm to point towards the first thin plate to be spliced. This allows the edge of the first thin plate to be welded to be accurately stopped at the preset position. Compared with manual operation of positioning blocks and squares, this device can significantly reduce positioning and centering errors and is highly efficient and reliable. Meanwhile, considering the narrow welding area of ​​the welding machine and the high precision requirements of the pre-set welding position of the thin plate, in order to ensure proper storage of the thin plate splicing positioning and centering device and the positional accuracy of stopping the first thin plate, a structure with a liftable lifting shaft and a deflectable positioning arm is used. The positioning arm can be raised above the track parallel to the weld length direction through the weld clearance reserved on the roller conveyor of the welding machine, and then deflected to point towards the first thin plate to achieve positioning and stopping. When storing, the positioning arm can be deflected to make it parallel to the weld length direction, and then lowered below the roller conveyor for storage.

[0054] See Figure 3 In some embodiments, in order to ensure the posture of the positioning arm 800 and enable its edge to stably contact the edge of the stop plate, the plate splicing positioning and centering device may also be equipped with a slewing bearing 900; specifically, the inner ring 920 of the slewing bearing 900 is sleeved on the turntable 400, and the outer ring 910 of the slewing bearing 900 is fixed in the turntable 300, so that the slewing bearing 900 can be used to realize the rotation of the turntable 400 in place and restrict its swing in other directions.

[0055] In some embodiments, the slewing bearing 900 can be configured as a ball bearing, utilizing the differential rotation of the inner and outer rings to maintain a stable rotational posture of the turntable 400. Of course, other types of bearings are not excluded, and this embodiment does not impose any limitations.

[0056] In some embodiments, in order to limit the overall or partial tilting of the turntable 400 along its axial direction, a first support 320 is provided inside the turntable 300, a second support 410 is provided on the outer side wall of the turntable 400, the outer ring of the slewing bearing 900 rests on the first support 320 and is pressed by a clamping limit ring 310, and the inner ring of the slewing bearing 900 rests on the second support 410, thereby using the cooperation of the inner and outer rings to limit the position of the turntable 400.

[0057] Generally, the radial width of the clamping limit ring 310 can cover the area between the inner and outer rings of the slewing bearing 900, or be slightly larger, to prevent debris from entering and maintain the smooth operation and service life of the bearing.

[0058] In some embodiments, a clamping boss 311 may be provided on the clamping limit ring 310 to press against and clamp the outer ring 910, and to maintain a certain gap between the clamping limit ring 310 and other parts of the rotary bearing 900, so as to avoid affecting the movement of the inner ring 920 and the ball.

[0059] In some embodiments, considering that there will be a certain degree of sliding frictional contact between the rotary table 400 and the rotary seat 300, in order to reduce wear and the impact on the rotation amplitude, a self-lubricating material layer can be provided on the two surfaces of the rotary table 400 and the rotary seat 300 that are in contact, so as to reduce the coefficient of friction and the degree of wear, and reduce the impact of friction on the rotation posture of the rotary table 400.

[0060] In some embodiments, the mounting base 100 may be configured as an upper, middle and lower layer assembly structure consisting of an upper mounting platform 110, a mounting bracket 120 and a lower mounting platform 130; wherein the upper mounting platform 110 is used to fix the rotary seat 300 and has a hole for the rotation shaft 210 of the rotary drive cylinder 200 to pass through; the lower mounting platform 130 is used to be mounted on the mounting base of the welding machine; and the mounting bracket 120 supports and connects the upper mounting platform 110 and the lower mounting platform 130 to form a stable frame structure, providing sufficient installation and operation space for the rotary drive cylinder 200.

[0061] See Figure 2 and Figure 3 In some embodiments, the guide cylinder 700 serves as a guide and limiting structure for the lifting shaft 720, and includes a cylinder body and a mounting flange 710 disposed on the cylinder body; the cylinder body is well adapted to the lifting shaft 720, maintaining a small sliding gap and limiting the swing amplitude.

[0062] The mounting flange 710 is fixed to the lifting bracket 500 by fasteners.

[0063] In some embodiments, a stop groove can be provided on the inner wall of the cylinder along the axial direction of the lifting shaft 720, and a stop boss is provided on the outer wall surface of the lifting shaft 720 along the axial direction of the lifting shaft 720. The stop boss is embedded in the stop groove to restrict the rotation of the lifting shaft 720, so as to maintain the reliability of the position and attitude of the positioning arm 800.

[0064] In other embodiments, to improve the flexibility of adjusting the height position of the lifting shaft 720, a screw hole can be provided on the lifting shaft 720, and the screw hole is coaxially arranged with the lifting shaft 720. The piston rod 610 is screwed into the screw hole, and the height position of the lifting shaft 720 relative to the lifting bracket 500 can be achieved by rotating the lifting shaft 720. On the other hand, the reliability of fixing the lifting shaft 720 can also be improved by using a threaded connection structure.

[0065] See Figure 2 and Figure 3 In some embodiments, the lifting bracket 500 serves as a static bracket for supporting the lifting cylinder 600, the guide cylinder 700, and other related moving parts.

[0066] The lifting support 500 can be specifically configured as a three-layer splicing support structure consisting of an upper support platform 510, a support body 520, and a lower support platform 530; wherein, the upper support platform 510 is used to support and fix the guide cylinder 700, the lower support platform 530 is used to be fixedly connected to the turntable 400, and the support body 520 is connected and supported between the support platform 510 and the lower support platform 530 to form a frame structure and fix the lifting cylinder 600.

[0067] See Figure 1 , Figure 2 and Figure 3 In some embodiments, in order to balance the stopping effect with minimal damage to the edge of the thin plate, the end of the positioning arm 800 away from the lifting shaft 720 is provided with a contact arc surface 810; the arc surface adapts to the deflection process of the positioning arm 800, avoiding scraping or even lifting the edge of the thin plate when the positioning arm 800 is retracted, thereby reducing the adverse impact on the quality of splicing and welding.

[0068] In some embodiments, in order to improve the reliability of fixing the positioning arm 800, a positioning through hole is provided at one end of the positioning arm 800 near the lifting shaft 720, and a positioning boss is provided on the end face of the lifting shaft 720. The positioning boss is embedded in the positioning through hole, and the positioning arm 800 is stably fixed by means of sleeve connection.

[0069] In some embodiments, the positioning through hole can be set as a countersunk hole, and a clamping member 730 is provided in the countersunk hole. The clamping member 730 is fixed on the positioning boss by a fastener 740 and presses the positioning stop arm 800 on the lifting shaft 720, further enhancing the fastening effect. The countersunk hole structure reduces the spatial specifications of the fixing structure of the positioning stop arm 800 and reduces the risk of interference with the surrounding environment.

[0070] In some embodiments, the positioning boss can be configured as a polygon or irregular structure to achieve an anti-rotation effect and restrict the rotation of the positioning stop arm 800 relative to the lifting shaft 720.

[0071] Another aspect of this application embodiment provides a special machine for welding thin plates equipped with the above-mentioned thin plate splicing positioning and centering device.

[0072] Specifically, the thin plate splicing positioning and centering device can be positioned below the thin plate conveying roller table and near or within the weld seam avoidance area, so that the lifting shaft 720 and the positioning stop arm 800 can extend above the roller table and point towards the edge of the welded thin plate. When the first thin plate passes through the weld seam area, the thin plate splicing positioning and centering device extends and deflects, so that the positioning stop arm 800 points towards the thin plate, and the base arc surface 810 of the positioning stop arm 800 is located in a preset position to stop the first thin plate.

[0073] After positioning and alignment are completed, the positioning arm is deflected 800 degrees and then lowered below the roller conveyor for storage, ready for the next use.

[0074] The entire process can be manually controlled or automatically detected and executed by the on-site control system of a welding machine.

[0075] Of course, in order to improve the efficiency and reliability of positioning and alignment, multiple thin plate splicing positioning and alignment devices can be set, such as four or five; or the number can be flexibly set according to the actual length of the weld of the thin plate.

[0076] The embodiments of this application have at least the following beneficial effects:

[0077] The thin plate splicing positioning and centering device and thin plate welding machine provided in this application, by setting a rotary drive cylinder and a rotary seat on the mounting base, and rotating a turntable inside the rotary seat, can be driven to rotate by the rotary drive cylinder, thus forming a rotatable mechanism; a lifting bracket is also provided, in which a lifting cylinder and a guide cylinder are set, and a slidable lifting shaft is set inside the guide cylinder, thus moving the lifting shaft by pushing and pulling the lifting cylinder, forming a lifting mechanism; then the lifting bracket is fixed on the turntable, thus forming a rotatable and lifting mechanism based on the mounting base. The integrated structure lowers the positioning arm and connects it to the lifting shaft, enabling the positioning arm to be raised, lowered, and deflected. When the thin plate splicing positioning and centering device is set on the welding machine, it can automatically raise the positioning arm to the corresponding height of the preset weld area with a stable and reliable range of motion according to the set parameters, and deflect the positioning arm to point towards the first thin plate to be spliced, so that the edge of the first thin plate to be welded can be accurately stopped in the preset position. Compared with manual operation of positioning blocks and squares, it can significantly reduce positioning and centering errors, and the operation is efficient and reliable. Meanwhile, considering the narrow welding area of ​​the welding machine and the high precision requirements of the pre-set welding position of the thin plate, in order to ensure proper storage of the thin plate splicing positioning and centering device and the positional accuracy of stopping the first thin plate, a structure with a liftable lifting shaft and a deflectable positioning arm is used. The positioning arm can be raised above the track parallel to the weld length direction through the weld clearance reserved on the roller conveyor of the welding machine, and then deflected to point towards the first thin plate to achieve positioning and stopping. When storing, the positioning arm can be deflected to make it parallel to the weld length direction, and then lowered below the roller conveyor for storage.

[0078] 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.

[0079] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application.

[0080] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0081] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0082] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer 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.

[0084] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0085] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A sheet splicing positioning centering device, characterized by, The sheet splicing positioning centering device comprises a mounting base, a rotary driving cylinder, a rotary seat, a rotary disc, a lifting support, a lifting cylinder, a guide cylinder, a lifting shaft and a positioning blocking arm. The rotary seat is fixed on the mounting base, the rotary disc is rotatably arranged in the rotary seat, the cylinder body of the rotary driving cylinder is fixed on the mounting base, and the rotary shaft of the rotary driving cylinder is connected with the rotary disc to drive the rotary disc to rotate in the rotary seat. The lifting support is fixed on the rotary disc, the guide cylinder is fixed on the lifting support, the lifting shaft is movably arranged in the guide cylinder along the axial direction, and the lifting shaft is coaxially arranged with the rotary shaft. The cylinder body of the lifting cylinder is fixed on the lifting support, and the piston rod of the lifting cylinder is connected with the lifting shaft to push the lifting shaft to slide in the guide cylinder. The positioning blocking arm is fixed on the lifting shaft, and an end of the positioning blocking arm away from the lifting shaft is provided with a contact arc surface to adapt to the deflection process of the positioning blocking arm and avoid scratching or lifting the edge of the sheet when the positioning blocking arm is recovered. The sheet splicing positioning centering device further comprises a rotary bearing. The inner ring of the rotary bearing is sleeved on the rotary disc, and the outer ring of the rotary bearing is fixed in the rotary seat. The rotary seat is provided with a first bearing platform, and the outer side wall of the rotary disc is provided with a second bearing platform.

2. The sheet splicing alignment and centering device of claim 1, wherein, The outer ring of the rotary bearing is placed on the first bearing platform and is pressed by a pressing limiting ring. The inner ring of the rotary bearing is placed on the second bearing platform. Self-lubricating material layers are arranged on the two surfaces of the rotary disc in contact with the rotary seat.

3. The sheet splicing alignment and centering device of claim 2, wherein, The guide cylinder comprises a cylinder body and a mounting flange arranged on the cylinder body.

4. The sheet splicing alignment and centering device of claim 1, wherein, The mounting flange is fixed on the lifting support by fasteners. Screw holes are arranged on the lifting shaft, and the screw holes are coaxially arranged with the lifting shaft.

5. The sheet splicing alignment and centering device of claim 1, wherein, The piston rod is screwed in the screw holes. A positioning through hole is arranged on an end of the positioning blocking arm close to the lifting shaft, and a positioning boss is arranged on the end surface of the lifting shaft.

6. The sheet splicing alignment and centering device of claim 1, wherein, The positioning through hole is a counterbore, and a pressing member is arranged in the counterbore.

7. The sheet splicing alignment and centering device of claim 6, wherein, The pressing member is fixed on the positioning boss by fasteners and presses the positioning blocking arm on the lifting shaft.

8. A sheet metal welding machine, characterized in that The sheet splicing positioning centering device comprises a mounting base, a rotary driving cylinder, a rotary seat, a rotary disc, a lifting support, a lifting cylinder, a guide cylinder, a lifting shaft and a positioning blocking arm. The sheet splicing positioning centering device comprises a mounting base, a rotary driving cylinder, a rotary seat, a rotary disc, a lifting support, a lifting cylinder, a guide cylinder, a lifting shaft and a positioning blocking arm.

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