Display screen frame welding tool

Abstract

The utility model relates to the technical field of display screen frame welding, and provides a display screen frame welding tool which comprises a bottom plate, a limiting plate, a limiting frame and a positioning assembly. The limiting plate is convexly arranged on the bottom plate; the limiting frame is fixedly arranged on the limiting plate, a plurality of end faces are arranged on the periphery of the edge of the limiting frame, and the end faces and the outer wall face of the periphery of the limiting plate are coplanar to form a limiting face. The positioning assembly is fixedly connected with the limiting frame; first limiting structures are arranged on the bottom plate on the two sides of the limiting plate, and second limiting structures are arranged on the bottom plate at the two ends of the limiting plate. Overall welding of the display screen frame can be achieved through the limiting plate and the limiting frame, the positioning assembly is arranged on the limiting frame, welding of the supporting frame can be achieved through the positioning assembly, then overall one-time welding of the display screen frame can be achieved, accumulated errors caused by separated welding are reduced, the overall error of the display screen frame is controllable, and the welding efficiency is improved. The welding quality of finished products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display screen frame welding, in particular to a display screen frame welding tool. Background Art

[0002] Display screens usually have frames for support and installation, and the size of display screens on current operating devices is gradually increasing. When installing the display screens, the precision of the sheet metal frames is low, which makes it difficult for the fit gaps and fit steps generated after the display screens are assembled to meet quality requirements.

[0003] In the related art, the sheet metal frame of the display screen and various supporting frames and other components are welded by connecting them separately. This method has a large cumulative error, resulting in low precision of the display screen frame and difficulty in meeting high-quality assembly requirements. Utility Model Content

[0004] The utility model provides a display screen frame welding tool, which is used to solve the defects of uncontrollable display screen frame welding precision and poor welding precision in the prior art.

[0005] The utility model provides a display screen frame welding tool, comprising:

[0006] Base plate;

[0007] A limiting plate, wherein the limiting plate is convexly arranged on the bottom plate, and an outer wall surface around the edge of the limiting plate is used for contacting and limiting with an inner wall surface of the display screen frame;

[0008] A limiting frame, wherein the limiting frame is fixedly arranged on the limiting plate, and the limiting frame has a plurality of end faces on a periphery of the edge thereof, and the plurality of end faces and an outer wall surface of a periphery of the limiting plate are coplanar to form a limiting surface;

[0009] A positioning assembly, the positioning assembly is fixedly connected to the limiting frame, and the positioning assembly is used to provide positioning support when the support frame is welded;

[0010] Among them, a first limiting structure is arranged on the bottom plate on both sides of the limiting plate, and a second limiting structure is arranged on the bottom plate at both ends of the limiting plate. The first limiting structure and the second limiting structure are both used for contacting and limiting with the outer wall surface of the display screen frame.

[0011] According to the display screen frame welding tool provided by the utility model, the limiting frame includes a horizontal bar portion and a vertical bar portion, and the horizontal bar portion and the vertical bar portion are connected to each other to form a grid-like structure.

[0012] According to the display screen frame welding tool provided by the utility model, the two ends of the horizontal bar portion and the vertical bar portion form the end surface, and an inclined guide surface is also constructed on the end surface.

[0013] According to the display screen frame welding tool provided by the utility model, the limiting plate is constructed as a rectangular structure, and a third limiting structure is provided near each corner position of the limiting plate, and the third limiting structure is used for contacting and limiting with the bottom surface of the display screen frame.

[0014] According to the display screen frame welding tool provided by the utility model, the third limiting structure includes a connecting block, a connecting rod arranged in a vertical direction is provided on the top of the connecting block, a flexible contact part is provided on the end of the connecting rod, and the contact surface of the flexible contact part is used to contact the bottom surface of the display screen frame.

[0015] According to the display screen frame welding tool provided by the utility model, the positioning assembly is provided on the limiting frame near each corner position of the limiting plate, and the positioning assembly is located at the edge position of the limiting frame.

[0016] According to the display screen frame welding tool provided by the utility model, the positioning assembly includes a support block, at least two positioning columns and a fourth limiting structure, the support block is fixedly arranged on the limiting frame, the two positioning columns are spaced apart on the support block, and the fourth limiting structure is arranged in the limiting frame and is used for contacting and limiting with the upper surface of the support frame.

[0017] According to the display screen frame welding tool provided by the utility model, the second limiting structure includes two support vertical plates arranged at intervals, a limiting block is connected between the two support vertical plates, and the outer wall surface of the limiting block is used to contact the outer wall surface of the display screen frame.

[0018] According to the display screen frame welding tool provided by the utility model, a plurality of the first limiting structures are arranged on the bottom plate on each side, and the plurality of the first limiting structures are arranged in parallel and at intervals.

[0019] According to the display screen frame welding tooling provided by the utility model, the first limiting structure includes a support seat, a laterally arranged contact rod is provided on the support seat, the end of the contact rod has a flexible abutment portion, and the abutment surface of the flexible abutment portion is used to contact the outer wall surfaces on both sides of the display screen frame.

[0020] According to any of the above embodiments, the utility model has at least the following beneficial effects:

[0021] The utility model provides a display screen frame welding tool, which can realize the overall welding of the display screen frame through a limiting plate and a limiting frame, and a positioning component is provided on the limiting frame, through which the welding of the support frame can be realized, and then the overall one-time welding of the display screen frame can be realized, thereby reducing the cumulative error of separate welding, making the overall error of the display screen frame controllable, and improving the welding quality of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the display screen frame welding tooling provided by the utility model;

[0024] Figure 2 The utility model provides Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 3 It is a structural schematic diagram of assembling a display screen frame on a welding tool provided by the utility model;

[0026] Figure 4 The utility model is a schematic diagram of the structure of the display screen frame assembling the display screen.

[0027] Reference numerals:

[0028] 10. Bottom plate; 20. Limiting plate; 30. Limiting frame; 31. Horizontal strip; 32. Vertical strip; 33. End face; 34. Guide face; 40. Positioning assembly; 41. Support block; 42. Positioning column; 43. Fourth limiting structure; 50. First limiting structure; 51. Support seat; 52. Contact rod; 53. Flexible abutment; 60. Second limiting structure; 61. Support vertical plate; 62. Limiting block; 70. Third limiting structure; 71. Connecting block; 72. Connecting rod; 73. Flexible contact part; 80. Display frame; 90. Support frame. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0032] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0034] The outer perimeter of the display screen usually needs to be connected to the display screen frame to support the display screen, and sheet metal is usually used as the frame structure of the display screen. When the frame structure is assembled with the display screen, it needs to support the weight of the display screen and be able to connect well with external equipment or support platforms.

[0035] Usually, the frame is welded by multiple sheet metal parts. When assembling the display screen and connecting it to an external support platform, it needs to be connected through a support frame, that is, it is necessary to weld multiple support frames in the frame for connecting the display screen or for connecting it to an external support platform. In the related art, separate welding is often used when welding the frame and positioning welding the support frame. This method leads to a large cumulative error in the welding of the display screen frame, making the accuracy of the frame uncontrollable, and the matching clearance and matching step difference after the display screen is assembled are difficult to meet the requirements.

[0036] Regarding the problems in related technologies, such as Figure 1-Figure 3As shown, this embodiment provides a display screen frame welding tool, the display screen frame 80 includes a frame structure around the outside and a support frame 90 connected inside the frame, the frame structure is used to cover the display screen body, the support frame 90 is used to connect the display screen or connect to an external support platform, the welding tool includes a base plate 10, a limit plate 20, a limit frame 30 and a positioning assembly 40; the limit plate 20 is convexly arranged on the base plate 10, and the outer wall surface around the edge of the limit plate 20 is used to contact and limit with the inner wall surface of the display screen frame 80; the limit frame 30 is fixedly arranged on the limit plate 20, a plurality of end faces 33 are provided on the edge of the limit frame 30, and the plurality of end faces 33 are coplanar with the outer wall surface of the limit plate 20 to form a limit surface; a positioning component 40 is fixedly connected to the limit frame 30, and the positioning component 40 is used to provide positioning support when the support frame 90 is welded; wherein, a first limit structure 50 is provided on the bottom plate 10 on both sides of the limit plate 20, and a second limit structure 60 is provided on the bottom plate 10 at both ends of the limit plate 20, and the first limit structure 50 and the second limit structure 60 are both used for contacting and limiting with the outer wall surface of the display screen frame 80. The display screen frame 80 is usually a closed ring structure. During welding, multiple sheet metal parts need to be welded to form a closed ring structure. In this embodiment, the inner wall surface of the display screen frame 80 can be limited by the outer contour surface of the limiting plate 20, and the outer wall surface of the display screen frame 80 can be limited by the first limiting structure 50 and the second limiting structure 60, thereby improving the accuracy of the limitation. In addition, the positioning component 40 provided on the limiting frame 30 can provide positioning and support when the support frame 90 is welded, thereby realizing the welding of the entire display screen frame 80 and the support frame 90 on one welding tool, reducing the cumulative error caused by separate welding, and improving welding accuracy and welding efficiency.

[0037] It is understandable that if Figure 2 As shown, when the display screen frame 80 is welded, the inner and outer walls of the display screen frame 80 need to be limited, so as to facilitate the welding of the display screen frame 80 and improve the welding accuracy of the display screen. In this embodiment, the inner wall surface of the display screen frame 80 is limited by a protruding portion of the limiting plate 20 itself and the exposed end surface 33 of the limiting frame 30, and the outer wall surface of the display screen frame 80 is limited by the first limiting structure 50 and the second limiting structure 60. This method can realize the overall limiting welding of the display screen frame 80 and improve the welding accuracy.

[0038] like Figure 4As shown, the display screen frame 80 is used to install the display screen. When installing the display screen, a support frame 90 needs to be set at the bottom of the frame to support the display screen through the support frame 90. The support frame 90 is directly connected to the physical part of the display screen frame 80 by welding. In this embodiment, a positioning component 40 is connected to the limit frame 30. The positioning component 40 can provide positioning and support when the support frame 90 is welded, so that the display screen frame 80 body and the support frame 90 can be welded by the same welding tool, which improves the welding efficiency, reduces the cumulative error, and improves the welding accuracy of the display screen frame 80.

[0039] In the specific setting, the limit plate 20 is a plate structure, and the bottom surface of the limit plate 20 is fixedly connected to the bottom plate 10, so that the thickness of the limit plate 20 protrudes from the upper surface of the bottom plate 10, thereby forming a circle of edge protrusion structure, which enables the limit plate 20 to play a limiting role when the display screen frame 80 is welded, so that the display screen frame 80 has a precise size. And the setting of the whole circle enables the display screen frame 80 to be welded as a whole, improves the welding quality, reduces the cumulative error caused by separate welding, and improves the quality of the finished product.

[0040] It is understandable that when welding the display screen frame 80, each sheet metal part needs to be limited and fixed by a welding tool to facilitate welding by the welding device. In this embodiment, the raised edge of the limiting plate 20 is in contact with the inner wall surface of the display screen frame 80 to limit the position, so that multiple sheet metal parts can be limited and fixed as a whole, thereby realizing overall welding and improving welding efficiency and welding accuracy.

[0041] The display screen frame 80 often has a certain height. The display screen frame 80 of a certain height can cover the display screen all around. The protruding part of the limiting plate 20 obviously cannot achieve stable limiting fixation. Therefore, in this embodiment, a limiting frame 30 is set on the limiting plate 20. The limiting frame 30 has a plurality of end faces 33 around it. The plurality of end faces 33 are coplanar with the outer wall surface of the limiting plate 20 all around, thereby forming a limiting surface with a certain height all around, thereby achieving stable limiting support for the inner wall surface of the display screen frame 80 and improving the limiting stability of the display screen frame 80.

[0042] It is understandable that the formed limiting surface can provide stable support and limiting for the inner wall surface of the display screen frame 80, and in order to make the display screen frame 80 stable as a whole, its outer wall also needs to be limited. In this embodiment, the outer wall surface limiting of the display screen frame 80 is achieved by the first limiting structure 50 and the second limiting structure 60. The first limiting structure 50 and the second limiting structure 60 are both at a certain distance from the limiting surface, and the first limiting structure 50 and the second limiting structure 60 are arranged at intervals on a circle around the periphery of the limiting plate 20, so that when the display screen frame 80 needs to be limited and fixed, the first limiting structure 50 and the second limiting structure 60 can achieve limiting support for the outer wall of the display screen frame 80.

[0043] In this embodiment, the limiting plate 20 is a plate structure, and its two side parts and two end parts can realize the limitation of the limiting plate 20 as a whole. That is, the first limiting structure 50 is arranged on both sides of the limiting plate 20, and the second limiting structure 60 is arranged at both ends of the limiting plate 20. The first limiting structure 50 and the second limiting structure 60 together form the overall limiting structure of the periphery of the limiting plate 20.

[0044] In some specific implementations, the limit frame 30 includes a horizontal bar portion 31 and a vertical bar portion 32, and the horizontal bar portion 31 and the vertical bar portion 32 are connected to each other to form a grid-like structure. The welding tool should have as low a mass as possible while ensuring that the workpiece can be limited and stable. In this embodiment, the limit frame 30 is constructed as a grid-like structure, which can make the welding tool have a higher structural strength on the one hand, and on the other hand, it has a lower mass, which is conducive to the manufacture and transportation of the tool.

[0045] The horizontal bar portion 31 and the vertical bar portion 32 are both long block structures, and the horizontal bar portion 31 and the vertical bar portion 32 are vertically connected to each other to form a grid-like structure, and the grid-like structure has a plurality of end faces 33 around it, and each end face 33 is coplanar with the outer contour surface of the bottom limiting plate 20 to form an integral limiting surface, thereby providing stable support when the display screen frame 80 is limited.

[0046] In specific examples, such as Figure 1 As shown, the horizontal bar portion 31 is horizontally connected to the limiting plate 20, and the vertical bar portion 32 is perpendicular to the horizontal bar portion 31 and fixedly connected to the limiting plate 20. This structure forms an overall grid-like structure, and at least one end of each horizontal bar portion 31 and each vertical bar portion 32 forms an end face 33, and the outermost wall surface of the end face 33 is coplanar with the outer contour surface of the limiting plate 20, so that the display screen frame 80 can be stably supported.

[0047] When setting specific Figure 1 , Figure 2As shown, the two ends of the horizontal strip 31 and the vertical strip 32 form an end surface 33, and an inclined guide surface 34 is also constructed on the end surface 33. When the display screen frame 80 needs to be removed after welding, and when the sheet metal parts are surrounded to form a frame, they need to contact the end surface 33. In this embodiment, the setting of the guide surface 34 facilitates the movement of the display screen frame 80.

[0048] It can be understood that the end surfaces 33 at both ends of the horizontal bar portion 31 and the vertical bar portion 32 increase the contact area with the inner wall surface of the display screen frame 80, thereby improving the stability of the limiting support, and the setting of the guide surface 34 is conducive to the removal of the display screen frame 80, thereby improving the production efficiency of the finished product.

[0049] In a specific embodiment, the limiting plate 20 is constructed as a rectangular structure, and a third limiting structure 70 is provided near each corner position of the limiting plate 20. The third limiting structure 70 is used to contact and limit with the bottom surface of the display frame 80. The display frame 80 has a certain height. In this embodiment, the third limiting structure 70 is used to limit the height direction of the display frame 80, further improving the stability of the limit.

[0050] In the specific configuration, the overall size of the limiting plate 20 is configured to be comparable to the inner wall size of the display screen frame 80, so that the inner wall of the display screen frame 80 can be supported by the limiting plate 20 and the limiting frame 30. The third limiting structure 70 is configured to limit the degree of freedom of the display screen frame 80 in the vertical direction, thereby improving the limiting stability of the display screen frame 80.

[0051] In the specific setting, a positioning assembly 40 is provided on each corner position of the limiting frame 30 near the limiting plate 20, and the positioning assembly 40 is located at the edge position of the limiting frame 30. Generally, when a rectangular display screen is installed, there are support frames 90 at the four corner positions of the display screen. In this embodiment, positioning assemblies 40 are provided at the four corner positions of the display board, and the limiting support of the support frames 90 at the corresponding positions is realized, thereby realizing the simultaneous welding of the support frames 90, and improving the overall welding accuracy of the display screen frame 80.

[0052] like Figure 1 , Figure 3 As shown, positioning components 40 are provided at four corner positions close to both ends of the limiting plate 20 , and the positioning components 40 can realize the positioning support of the support frame 90 .

[0053] In a specific implementation manner, Figure 2As shown, the positioning assembly 40 includes a support block 41, at least two positioning columns 42 and a fourth limiting structure 43. The support block is fixedly arranged on the limiting frame 30, and two positioning columns 42 are arranged at intervals on the support block 41. The fourth limiting structure 43 is arranged in the limiting frame 30 and is used to contact and limit with the upper surface of the support frame 90. For the welding of the support frame 90, the accuracy of its position will determine the overall quality of the display screen frame 80. In this embodiment, the two positioning columns 42 can realize the precise positioning of the support frame 90, and the fourth limiting structure 43 can limit its vertical degree of freedom, thereby realizing the precise positioning of the support frame 90 and improving the overall quality of the display screen frame 80.

[0054] like Figure 3 As shown, the support block 41 is connected to the limit frame 30, and the position of the support block 41 itself is fixed by connecting to the limit frame 30. The support frame 90 has bolt holes, and the bolt holes are positioned through the positioning columns 42. The support and height positioning are achieved through the support block 41, so that the overall high-precision positioning of the support frame 90 is achieved, thereby improving the overall quality of the display screen frame 80.

[0055] In a specific embodiment, the fourth limiting structure 43 is the same as the third limiting structure 70, and the difference is that the third limiting structure 70 is higher than the fourth limiting structure 43. Specifically, the third limiting structure 70 includes a connecting block 71, and a connecting rod 72 arranged in a vertical direction is provided on the top of the connecting block 71. A flexible contact portion 73 is provided at the end of the connecting rod 72, and the contact surface of the flexible contact portion 73 is used to contact the bottom surface of the display screen frame 80. The third limiting structure 70 is used to limit the degree of freedom of the display screen frame 80 in the vertical direction. In this embodiment, the third limiting structure 70 is fixedly connected to the bottom plate 10 through the connecting block 71, and the connecting rod 72 is connected to the top of the connecting block 71 and extends vertically downward. A flexible contact portion 73 is provided on the end of the connecting rod 72. The flexible contact portion can realize the limitation of the degree of freedom in the vertical direction and prevent damage caused by contact and abutment.

[0056] like Figure 1 , 3 As shown, the height of the connecting block 71 is higher than the upper surface of the limiting frame 30 , which enables the connecting rod 72 to extend vertically downward and achieve contact and limiting with the bottom surface of the display screen frame 80 .

[0057] According to the specific embodiment provided by the utility model, the second limiting structure 60 includes two support uprights 61 arranged at intervals, and the limiting block 62 is connected between the two support uprights 61, and the outer wall surface of the limiting block 62 is used to contact the outer wall surface of the display screen frame 80. The limiting plate 20 is constructed as a rectangular structure, which requires both sides and both ends of the limiting plate 20 to be limited. In this embodiment, the contact area with the two end parts of the display screen frame 80 can be increased by setting the limiting block 62, thereby improving the stability of the limiting support.

[0058] It is understandable that when the rectangular display screen frame 80 is welded, the frame bodies at both ends need stable limiting supports. In this embodiment, stable limiting can be achieved through the second limiting structures 60 at both ends.

[0059] In some specific implementations, a plurality of first limiting structures 50 are disposed on the bottom plate 10 on each side, and the plurality of first limiting structures 50 are arranged in parallel and spaced apart. In this embodiment, the two sides of the limiting plate 20 are the length direction of the display screen frame 80. For a large-sized display screen frame 80, its length is relatively long, so the stability of the limiting support is improved by using a plurality of first limiting structures 50.

[0060] In specific configuration, the first limiting structure 50 includes a support seat 51, a contact rod 52 arranged transversely is provided on the support seat 51, and a flexible abutment portion 53 is provided at the end of the contact rod 52, and the abutment surface of the flexible abutment portion 53 is used to contact the outer wall surfaces on both sides of the display screen frame 80. In this embodiment, the flexible abutment portion 53 can realize the limiting of both sides of the display screen frame 80, and can also avoid the damage to the frame caused by the abutment through the configuration of the flexible abutment portion 53.

[0061] like Figure 1 , 3 As shown, three first limiting structures 50 are provided on each side of the limiting plate 20, the three first limiting structures 50 are arranged at intervals, and the flexible abutment portions 53 on the first limiting structures 50 are located in the middle and upper part of the display screen frame 80, so as to achieve better limiting support.

[0062] Through the description of the above embodiments, technicians in this field can clearly understand that each embodiment can achieve the overall welding of the display screen frame 80 through the limiting plate 20 and the limiting frame 30, and a positioning component 40 is provided on the limiting frame 30, and the positioning component 40 can be used to achieve the welding of the support frame 90, and then the overall one-time welding of the display screen frame 80 can be achieved, which reduces the cumulative error of separate welding, makes the overall error of the display screen frame 80 controllable, and improves the welding quality of the finished product.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A display screen frame welding tool, characterized in that: include: Base plate; A limiting plate, wherein the limiting plate is convexly arranged on the bottom plate, and an outer wall surface around the edge of the limiting plate is used for contacting and limiting with an inner wall surface of the display screen frame; A limiting frame, wherein the limiting frame is fixedly arranged on the limiting plate, and the limiting frame has a plurality of end faces on a periphery of the edge thereof, and the plurality of end faces and an outer wall surface of a periphery of the limiting plate are coplanar to form a limiting surface; A positioning assembly, the positioning assembly is fixedly connected to the limiting frame, and the positioning assembly is used to provide positioning support when the support frame is welded; Among them, a first limiting structure is arranged on the bottom plate on both sides of the limiting plate, and a second limiting structure is arranged on the bottom plate at both ends of the limiting plate. The first limiting structure and the second limiting structure are both used for contacting and limiting with the outer wall surface of the display screen frame.

2. The display screen frame welding tool according to claim 1, characterized in that: The limiting frame includes a horizontal bar portion and a vertical bar portion, and the horizontal bar portion and the vertical bar portion are connected to each other to form a grid-like structure.

3. The display screen frame welding tool according to claim 2, characterized in that: The two ends of the transverse strip portion and the longitudinal strip portion form the end surface, and an inclined guide surface is also configured on the end surface.

4. The display screen frame welding tool according to claim 1 or 2, characterized in that: The limiting plate is constructed as a rectangular structure, and a third limiting structure is provided near each corner position of the limiting plate, and the third limiting structure is used for contacting and limiting with the bottom surface of the display screen frame.

5. The display screen frame welding tool according to claim 4, characterized in that: The third limiting structure comprises a connecting block, a connecting rod arranged vertically is provided on the top of the connecting block, a flexible contact portion is provided at the end of the connecting rod, and a contact surface of the flexible contact portion is used to contact the bottom surface of the display screen frame.

6. The display screen frame welding tool according to claim 4, characterized in that: The positioning assembly is disposed on the limiting frame near each corner position of the limiting plate, and the positioning assembly is located at the edge position of the limiting frame.

7. The display screen frame welding tool according to claim 6, characterized in that: The positioning assembly includes a support block, at least two positioning columns and a fourth limiting structure. The support block is fixedly arranged on the limiting frame, and the two positioning columns are spaced apart on the support block. The fourth limiting structure is arranged in the limiting frame and is used for contacting and limiting with the upper surface of the support frame.

8. The display screen frame welding tool according to claim 1, characterized in that: The second limiting structure includes two support vertical plates arranged at an interval, a limiting block is connected between the two support vertical plates, and an outer wall surface of the limiting block is used to contact the outer wall surface of the display screen frame.

9. The display screen frame welding tool according to claim 1, characterized in that: A plurality of the first limiting structures are arranged on the bottom plate on each side, and the plurality of the first limiting structures are arranged in parallel and at intervals.

10. The display screen frame welding tool according to claim 9, characterized in that: The first limiting structure comprises a support seat, on which a transversely arranged contact rod is provided, and the end of the contact rod has a flexible abutment portion, and the abutment surface of the flexible abutment portion is used to contact the outer wall surfaces on both sides of the display screen frame.

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