Display backboard forming process and display backboard

Abstract

The invention discloses a display back plate forming process and a display back plate, the process comprises the following steps: cutting four side edges of a back plate material sheet of a pull convex hull to form a first back plate comprising a first flanging and a second flanging, and two top corners of the first back plate are provided with first corners; the first back plate is punched, the first corner is beveled, a beveled edge splicing part is generated, all the first turned-over edges are obliquely hooked from the first folding line position, the second turned-over edges are folded from the second folding line position to form inner folding covered edges, and a second back plate is obtained; the second back plate is subjected to salient point forming and line cutting treatment, the inwards-folded covered edges are inwards turned and pressed, all the first turned edges are folded into side-folded covered edges from the third fold line position, the second turned edges are folded into L-shaped frames from the fourth fold line position, and all the first turned edges are folded into C-shaped frames from the fifth fold line position; and carrying out corner splicing on the C-shaped frame through the bevel edge splicing part, and carrying out riveting and shaping treatment on the obtained third back plate to generate the display back plate.

Description

Technical Field

[0001] The present invention relates to the technical field of display back panel processing, and in particular to a display back panel molding process and a display back panel. Background Art

[0002] Traditional large-scale commercial and educational displays usually need to carry heavier casings and display modules, and have strict requirements on installation accuracy and stability. The frame structure of the relevant display backplane needs to integrate laser sensors to support environmental perception, human-computer interaction and other functions. Therefore, there are high requirements for the flatness and deformation resistance of the frame.

[0003] In the related technologies, the technical solution of using aluminum alloy die-casting to form the display backplane can achieve the display backplane forming requirements of high strength (≥150MPa), high flatness and high stability through precision molds. However, the solution of using die-casting to form the display backplane is expensive because the aluminum alloy material is expensive and requires the use of a variety of complex processing processes, such as: CNC, sandblasting, anodizing and so on. In addition, the use of die-casting to prepare the display backplane requires the design of a positioning bracket or adjustment of the backplane structure, which increases the manufacturing cost and assembly difficulty.

[0004] There is no effective solution to the problem that the overall strength of the display back panel formed in the existing related technology is not high and cannot meet the relevant installation requirements. Summary of the Invention

[0005] In view of this, it is necessary to provide a display back panel molding process and a display back panel to at least solve the problem that the overall strength of the display back panel molded in the related art is not high and cannot meet the relevant installation requirements.

[0006] In a first aspect, the present invention adopts a technical solution as follows: a display back panel forming process, comprising the following steps: trimming four sides of a convex back panel material sheet to form a first back panel having flanges, wherein the flanges include first flanges located on a longitudinal rear side and two lateral sides and a second flange located on a longitudinal front side, and the first back panel has first corners remaining at at least two top corners on the longitudinal rear side; After punching the first back panel, at least two of the first corners are beveled to form corresponding beveled edge splicing parts on the first flange, and all the first flanges are simultaneously beveled inward from the preset first fold line position to form a hook and the second flange is folded inward from the preset second fold line position to form an inner folded edge to obtain the second back panel; after completing the embossing and cutting of the second back panel, and the inner folded edge is flattened inward and all the first flanges are folded inward from the preset third fold line position to form a side folded edge, the second flange is folded inward from the preset fourth fold line position to form an L-shaped frame and all the first flanges are folded inward from the preset fifth fold line position to form a C-shaped frame, and the C-shaped frame is corner-spliced by the beveled edge splicing part to obtain the third back panel; the third back panel is riveted and shaped in sequence to generate the display back panel.

[0007] In a second aspect, an embodiment of the present application further provides a display back panel, which is manufactured by the display back panel molding process described in the first aspect.

[0008] Compared with the prior art, the present invention has the following advantages: the embodiment of the present application provides a display back panel forming process and a display back panel, wherein the four sides of the convex back panel sheet are trimmed to form a first back panel with flanges, wherein the flanges include first flanges located on the longitudinal rear side and the transverse sides and a second flange located on the longitudinal front side, and the first back panel has first corners remaining at at least two top corners on the longitudinal rear side; After punching the first back panel, at least two of the first corners are beveled to form corresponding beveled edge splicing portions on the first flange, and all the first flanges are simultaneously beveled inward from the preset first fold line position to form a hook and the second flange is folded inward from the preset second fold line position to form an inner folded edge to obtain a second back panel; after completing the embossing and cutting of the second back panel, and the inner folded edge is flattened inward and all the first flanges are folded inward from the preset third fold line position to form a side folded edge, the second flange is folded inward from the preset fourth fold line position to form an L-shaped frame and all the first flanges are folded inward from the preset fifth fold line position to form a C-shaped frame, and the C-shaped frame is connected to the C-shaped frame through the beveled edge splicing portions. The three C-shaped frames are spliced at the corners to obtain a third back panel; the third back panel is riveted and shaped in sequence to generate the display back panel, by leaving a first corner at the two top corners on the longitudinal rear side during the trimming of the first back panel, and beveling the first corner to form a bevel splicing part, and the edges of the two lateral sides and the longitudinal rear side of the back panel are bent three times in sequence, and after the three bends, they are spliced at the corners through the bevel splicing part, the joints at the splicing are flat and small, and the display back panel can be integrally formed into three C-shaped frames by welding and fixing, thereby improving the overall strength of the display back panel, and the end faces of the C-shaped frames are flat, meeting the preset installation requirements, and solving the problem that the overall strength of the display back panel formed in the related art is not high and cannot meet the relevant installation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a flow chart of a display backplane forming process according to an embodiment of the present application; Figure 2 is a schematic diagram of a first backplane according to an embodiment of the present application; Figure 3 This is a schematic diagram of the first backplane after corner cutting in an embodiment of the present application; Figure 4 is a schematic longitudinal section diagram of a display backplane during a molding process according to an embodiment of the present application; Figure 5 is a cross-sectional schematic diagram of a display back panel during a molding process according to an embodiment of the present application; Figure 6 is a schematic diagram of a display back panel according to an embodiment of the present application; Figure 7 is a top perspective view of a corner cutting die according to an embodiment of the present application; Figure 8 yes Figure 7 A longitudinal perspective view of Figure 9 yes Figure 7 Horizontal perspective drawing; Figure 10 2 is a schematic longitudinal section diagram of a bending die according to an embodiment of the present application; Figure 11 is a schematic cross-sectional view of a bending die according to an embodiment of the present application; Figure 12 2 is a schematic longitudinal section diagram of a tablet bending die according to an embodiment of the present application; Figure 13 2 is a schematic cross-sectional view of a tablet bending die according to an embodiment of the present application; Figure 14 2 is a schematic longitudinal section diagram of an inward folding mold according to an embodiment of the present application; Figure 15 It is a cross-sectional schematic diagram of the inward folding mold of an embodiment of the present application. DETAILED DESCRIPTION

[0010] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0011] It should be noted that when a component is referred to as being "mounted on" another component, it may be mounted directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component.

[0012] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0013] refer to Figures 1 to 15 The following describes a display backplane forming process according to an embodiment of the present application. This embodiment provides a display backplane forming process. Figure 1 FIG. 1 is a flow chart of a display backplane forming process according to an embodiment of the present application. Figure 1 As shown, the process includes the following steps:

[0014] Step S101, trimming the four sides of the convex back plate material to form a first back plate 001 with a flange (refer to Figure 2 As shown), the flange includes a first flange 002 located on the longitudinal rear side and the transverse sides and a second flange 003 located on the longitudinal front side, and the first back panel 001 has a first corner 004 remaining at least at the two top corners of the longitudinal rear side.

[0015] In this embodiment, an iron plate with a thickness of 0.6mm to 1.0mm is used as the back panel material, and a convex bulge is drawn on the back panel material through a convex bulge mold to form an initial back panel. It can be understood that the convex bulge involved in the embodiment of the present application is a technology that is known and achievable to those skilled in the art, and does not constitute an unclear limitation to the embodiment of the application.

[0016] In this embodiment, after the initial backplane is prepared, a convex hull shaping and trimming die is used to shape the initial backplane to flatten the hull. Then, the four long cutting knives of the convex hull shaping and trimming die are used to trim the four sides of the initial backplane (backplane sheet). In this embodiment, For the trimming of the four side edges, long cutting knives of different sizes and shapes are used for trimming, wherein the same trapezoidal cutting knives are used for punching corresponding to the longitudinal rear side and the two transverse sides of the side edge, thereby forming notches of the same shape and first flanges 002 of the same shape on the longitudinal rear side and the two transverse sides of the initial back plate, and at the same time, first corners 004 are formed at the two corners of the longitudinal rear side of the initial back plate; in this embodiment, for the side edge of the longitudinal front side, long cutting knives of different shapes and sizes from those used for the other three side edges are used for trimming, so that second corners 005 and second flanges 003 are formed at the two corners of the longitudinal front side of the initial back plate, and at the same time, the depth of the notch formed on the side edge of the longitudinal front side is greater than the notches on the other three side edges, and a preset arc-shaped groove 006 is concave in the notch, so that when the L-shaped frame 007 is finally formed, a structure that meets the requirements is formed on the frame (reference Figure 6 006); in this embodiment, the first flange 002 and the second flange 003 are horizontal sides to be bent, that is, the first flange 002 and the second flange 003 are cut out from the horizontal side of the plane, and the first flange 002 and the second flange 003 are used to facilitate reference in each step of the subsequent bending process to produce three C-shaped frames 008 and L-shaped frames 007.

[0017] Step S102: After punching the first back plate 001, at least two first corners 004 are beveled to form corresponding beveled edge joints 009 on the first flange 002 (at this time, the state of the first back plate 001 is referenced to FIG. Figure 4 and Figure 5 State 1 in the figure), and synchronously move all the first flange 002 from the preset first folding line position (reference Figure 3 The dotted line 01 in the figure is beveled inward to form the hook 010 (reference Figure 4 and Figure 5 State 2) and move the second flange 003 from the preset second folding line position (reference Figure 3 Fold the dotted line 02 inward to create the inner fold edge 011 (reference Figure 5 State 2) to obtain the second backplane.

[0018] In this embodiment, punching operation is performed on the first back panel 001 by punching equipment (for example, a bending die 100 provided with an upper punch 15 and a lower ejector pin 16), and the position and number of punching are set according to demand; in this embodiment, after punching is completed, at least two first corners 004 of the first back panel 001 are beveled, and the purpose of beveling is to form a corresponding beveled splicing portion 009 on the first flange 002, wherein the beveled splicing portions 009 are formed on both sides of the transverse side of the first flange 002 located on the longitudinal rear side, and the beveled splicing portions 009 are formed on the longitudinal rear side of the first flange 002 located on both sides of the transverse side.

[0019] In this embodiment, after the bevel processing, the first flange 002 and the second flange 003 are respectively subjected to the corresponding first bending operation. Specifically, for the first flange 002, all the first flanges 002 are bent from the preset first folding line position (reference Figure 3 The dotted line 01) is formed inwardly to form a hook 010. The hook 010 is formed by beveling to enhance the structural strength of the display back plate and provide a better assembly interface. For the second flange 003, the corresponding forming equipment is also used to form the second flange 003 from the preset second fold line position (reference Figure 3 The dotted line 02 in the figure is folded inward to form an inner folded edge 011; in this embodiment, the first back plate 001 is punched, beveled, flanging formed and inner folded edge formed to finally form the second back plate.

[0020] Step S103, after finishing the convex point and line cutting process on the second back plate, the inner folding edge 011 is turned inward and flattened (refer to Figure 5 State 3) and move all first flanges 001 from the preset third fold line position (reference Figure 3 Fold the dotted line 03) inward to create the side fold 012 (reference Figure 4 and Figure 5 After the state 3), the second flange 003 is moved from the preset fourth fold line position (reference Figure 3 The selected line 04 in the figure is folded inward to form an L-shaped frame 007 (reference Figure 4 and Figure 5 State 4 in and Figure 6 ) and move all first flanges 002 from the preset fifth folding line position (reference Figure 3 The dotted line 05 in the figure is folded inward to form a C-shaped frame 008, and the C-shaped frame 008 is corner-jointed through the bevel joint 009 to obtain the third backboard.

[0021] In this embodiment, after the initial forming of the second back plate is completed, a convex point is first punched at a preset position of the second back plate using a stamping device, and then the formed convex points are subjected to a line cutting process. In this embodiment, the corresponding line cutting process is to flatten the uneven surface formed on the punched convex points. In this embodiment, after the convex point punching and line cutting processes are completed, the first flange 002 (with a hook 010) and the second flange 003 (with an inner folding edge 011) of the second back plate are subjected to a secondary bending process. Specifically, for the second flange 00 3. For the inner folding edge 011 formed in the first bending (the inner folding edge 011 is perpendicular to the second flange 003, that is, the inner folding edge 011 and the second flange 003 form a right angle at the second folding line position), the inner folding edge 011 is folded inward by the corresponding bending die, that is, the inner folding edge is pushed inward by the bending knife corresponding to the bending die (the bending stroke direction of the bending knife is lateral), so that the inner folding edge is close to the second flange until the inner folding edge 011 is flattened and attached to the second flange 003 (reference Figure 5 3), complete the secondary bending of the second flange 003. At this time, the outermost edge of the second flange 003 forms a flattened inner curling edge 018. For the first flange 002, another bending knife of the bending mold is used to bend the first flange 002 for the second time from the third folding line position away from the hook to bend out a side folding edge 012. At this time, the side folding edge 012 and the hook 010 form an L-shaped structure relative to the first flange 002. That is, the process of forming the side folding edge 012 is to bend the first flange 002 with the hook 010 again from the third folding line position to form an L-shaped bending structure on the outer side of all the first flanges 002 (reference Figure 4 and Figure 5 012 in state 3 in ).

[0022] In this embodiment, after the secondary bending of the first flanging 002 and the second flanging 003 is completed, the first flanging 002 and the second flanging 003 are synchronously subjected to a third bending. Moreover, during the third bending process, a method similar to bending out the side folded edge is adopted. That is, for the second flanging 003, the outer edge of the second flanging 003 is bent at the fourth fold line position which is a certain width away from the second fold line position, and the second flanging is bent into an L-shaped frame 007 (refer to 007 in state 4 in Figure 5 and refer to 007 in Figure 6 ), while for all the first flangings 002, the first flanging 002 is bent at the fifth fold line position which is a certain width away from the third fold line position, so as to bend the L-shaped bending structure once again. After this bending, the first flanging 002 is formed into a C-shaped frame 008 (refer to 008 in state 4 in Figure 4 and Figure 5 and 008 in Figure 6 ). At the same time, after the third bending of the first flanging 002, the hypotenuse splicing parts 009 on the transverse sides of the first flanging 001 at the longitudinal rear side are aligned and spliced with the hypotenuse splicing parts 009 of one first flanging 002 located on the transverse sides (refer to Figure 6 ), and the seam after splicing is small. Through subsequent welding, the three C-shaped frames 008 can form an integral frame; in this embodiment, during the third bending of the first flanging 002 and the second flanging 003, the bending positions of the first flanging 002 and the second flanging 003 are at the same horizontal height, that is, the fourth fold line position and the fifth fold line position are in the same horizontal plane, so that the thickness of the C-shaped frame 008 and the L-shaped frame 007 is the same. However, it should be understood that due to the differences in the trimming and bending structure of the second flanging, the heights of the vertical outer sides (perpendicular to the main body of the display backplane) of the L-shaped frame 007 and the C-shaped frame 008 are inconsistent. At the same time, the C-shaped frame 008 has a structure of two right-angle bendings and forms a "匚"-shaped frame.

[0023] Step S104, perform riveting and shaping on the third backplane in sequence to generate a display backplane.

[0024] In this embodiment, after the third bending is completed and the third backplane is generated, rivets are driven into the rivet holes punched on the third backplane (before the third bending or simultaneously with the third bending), and the third backplane with rivets driven is integrally shaped until the final display backplane is prepared.

[0025] Through the above steps S101 to S104, after the convex back plate is convexed, the four sides of the back plate are trimmed to form a first back plate 001 having a first flange 002 located on the longitudinal rear side and the transverse sides and a second flange 003 located on the longitudinal front side, and the first back plate 001 has first corners 004 remaining at at least two top corners on the longitudinal rear side; After punching the first back panel 001, at least two first corners 004 are beveled to form corresponding beveled edge joints 009 on the first flange 002, and all first flanges 002 are simultaneously beveled inward from the preset first fold line position to form a hook 010 and the second flange 003 is folded inward from the preset second fold line position to form an inner folding edge 011, so as to obtain a second back panel; after completing the embossing and cutting of the second back panel, and the inner folding edge 011 is flattened inward and all first flanges 002 are folded inward from the preset third fold line position to form a side folding edge 012, the second flange 003 is folded inward from the preset fourth fold line position to form an L-shaped frame 007 and all first flanges 002 are folded inward from the preset fifth fold line position to form a C-shaped frame 008, and through the beveled edge joints 009 The C-shaped frame 008 is spliced at the corners to obtain a third back panel; the third back panel is riveted and shaped in sequence to generate a display back panel; by leaving a first corner 004 at the two top corners on the longitudinal rear side during the trimming process of the first back panel 001, and beveling the first corner 004 to form a beveled splicing part 009, and the edges of the two lateral sides and the longitudinal rear side of the back panel are bent three times in sequence, and after the three bends, they are spliced at the corners through the beveled splicing part 009, the joints at the splicing are flat and small, and the display back panel can be integrally formed into three C-shaped frames 008 by welding and fixing, thereby improving the overall strength of the display back panel. The end face of the C-shaped frame 008 is flat, which meets the preset installation requirements, and solves the problem that the overall strength of the display back panel formed in the related technology is not high and cannot meet the relevant installation requirements.

[0026] In some of these embodiments, reference Figures 2 to 3 and Figure 6 , the first back plate 001 has second corners 005 remaining at the two top corners of the longitudinal front side. After punching the first back plate 001, the following steps are performed: the two second corners 005 are cut along the preset first cutting line (reference Figure 2 The dashed line 06 in the figure is cut to form two convex connecting parts 013 on the first back plate 001 near the two second corners 005, and to form L-shaped side edges 014 on both sides of the second flange 003 in the transverse direction, and to form horizontal edges 015 on the sides of the two first flanges 002 located on both sides in the transverse direction away from the oblique edge splicing part 009.

[0027] In some of these embodiments, reference Figure 2 、 Figure 3 、 Figures 6 to 8 , using the beveling die 200 to bevel at least two first corners, and this is achieved by the following steps:

[0028] Step 21, place the first back panel 001 with the remaining first corner 004 on the first lower stripping plate 21 of the corner cutting mold 200, wherein the first lower stripping plate 21 is arranged on the first lower template 22 of the corner cutting mold 200, and is arranged opposite to the first upper stripping plate 23 of the corner cutting mold 200, and a first corner cutting insert 24 is respectively provided at the two top corner positions on the longitudinal rear side of the first upper stripping plate 23, and a second corner cutting insert 25 is respectively provided at the two top corner positions on the longitudinal front side of the first upper stripping plate 23, and a first lower mold blade 26 and a second lower mold blade 27 are respectively provided at the positions on the first lower template 22 opposite to the first corner cutting insert 24 and the second corner cutting insert 25.

[0029] Step 22, drive the corner cutting mold 200 to close the mold, and make the first upper stripper 23 drive the first corner cutting insert 24 and the second corner cutting insert 25 to press the corresponding first corner 004 and the corresponding second corner 005 respectively.

[0030] Step 23, during the second downward movement of the first upper stripping plate 23 driving the first corner cutting insert 24 and the second corner cutting insert 25, the first corner cutting insert 24 is inserted into the corresponding first lower die blade 26 to cut the first corner 24 according to the preset second cutting line, so as to form the bevel splicing portion 009 and the corner notch 016 on the side of the first flange 002 close to the first corner 004 (refer to Figure 3 ), and insert the corresponding second lower die blade 27 through the second corner cutting insert 25 to cut the second corner 004 along the first cutting line to form the corresponding convex connecting portion 013 and the horizontal edge 014. After the C-shaped frame 008 is formed, the corner notch 016 at the same first corner 004 position is connected and surrounded by the corresponding bevel splicing portion 009 and the two corresponding first flanges 002 to form a hollow corner 017 (reference Figure 6 ), the gap formed after the two bevel joints 009 are spliced is less than 0.05mm.

[0031] It should be noted that, in this embodiment, the complete corner cutting mold 200 includes, from top to bottom, an upper support plate, an upper pad, an upper mold base, an upper mold plate, a stop plate, an upper release plate (corresponding to the first upper release plate 23), a lower release plate (corresponding to the first lower release plate 21), a lower mold plate, a lower pad, a lower mold base, a lower pad, and a lower support plate. In the accompanying drawings, other templates are not numbered, but this does not mean that the structure of the corner cutting mold 200 of the embodiment of the present application is unclear. At the same time, the corner cutting mold 200 of the embodiment of the present application can also adopt other corner cutting molds in the prior art to meet the needs of cutting the first corner 004 and the second corner 005 as needed.

[0032] In some of these embodiments, reference Figure 2 、 Figure 3 、 Figure 6 、 Figure 14 and Figure 15 , use the inner folding mold 300 to fold the second flange 003 from the preset fourth folding line position (reference Figure 6 Fold inwards at the dotted line 04) to form an L-shaped frame 007 and fold all the first flanges 002 from the preset fifth fold line position (reference Figure 6 The dotted line 05) in the figure is folded inward to form a C-shaped frame 008, which is achieved by the following steps:

[0033] Step 31, place the second back panel that has completed the inner folding edge flattening and side folding edge forming on the second lower stripping plate 31 of the inner folding mold 300, and make the corresponding second flange 003 (the corresponding inner folding edge 011 is flattened) and the corresponding first flange 002 (with the side folding edge 012) be placed on the first movable slider 32 and the second movable slider 33 of the inner folding mold 300 respectively, wherein the second lower stripping plate 31 is arranged on the second lower template 34 of the inner folding mold 300, and the longitudinal front side of the second lower template 34 is provided with a first movable slider 32, and the transverse sides and longitudinal rear side of the second lower template 34 are provided with second movable sliders 33, and the first movable slider 32 and the second movable slider 33 are both tilted and translated to avoid position by the inserting knife 35 provided on the second lower template 34, and the first movable slider 32 and the second movable slider 33 are both provided with a clearance groove 301.

[0034] In this embodiment, the lower mold part of the inner folding mold 300 uses a knife 35 to translate the first movable slider 32 and the second movable slider 33 to make way for 15 mm, that is, during the bending process, the first movable slider 32 and the second movable slider 33 are moved horizontally, so that during the bending process, a space is provided for the flattened inner folding edge 011 and the side folding edge 012 with the hook 010 to bend inward. By setting the avoidance groove 301, the flattened inner folding edge 011 and the slanted hook 010 are located in the avoidance groove 301, and the template of the inner folding mold 300 will not interfere with or block the bending.

[0035] Step 32, drive the inner folding mold 300 to close the mold, and drive the second upper stripper 36 of the inner folding mold 300 to drive the first inner folding knife 37 and the second inner folding knife 38 to press the corresponding second flange 003 and the corresponding first flange 001 respectively, wherein the inner side edge of the first inner folding knife 37 is aligned with the outer side edge of the first movable slider 32 and the fourth folding line position, and the inner side edge of the second inner folding knife 38 is aligned with the outer side edge of the second movable slider 33 and the fifth folding line position.

[0036] Step 33, when the inner folding mold 300 completes the mold closing process, the first inner folding knife 37 cooperates with the first movable slider 32 to fold the second flange 003 inwards from the fourth folding line position by 90 degrees until it is folded into an L-shaped frame 007, and the second inner folding knife 38 cooperates with the second movable slider 33 to fold all the first flanges 002 inwards from the fifth folding line position by 90 degrees until it is folded into a C-shaped frame 008, wherein the corresponding second flange 003 is inwardly folded. When folding, the inward-folded and flattened inner folding edge 011 is located in the avoidance groove 301 of the first movable slider 32 for translational avoidance, and the corresponding first flange 002 is folded inward, and the side folding edge 012 with the hook 010 is located in the avoidance groove 301 of the second movable slider 33 for translational avoidance. The distance between the fourth fold line position and the second fold line position is 7mm to 8mm, preferably 7mm, and the distance between the fifth fold line position and the third fold line position is 19mm to 21mm, preferably 21mm.

[0037] It should be noted that, in this embodiment, after three bendings and forming of three C-shaped frames 008, a very small seam (0.05mm) is formed at the hollow corner 016 where the two C-shaped frames 002 are spliced. The seam is flush, which is conducive to subsequent fixing together by welding, so that the back panel is integrally formed with three frames.

[0038] It should be understood that the complete inward folding mold 300 is also composed of an upper support plate, an upper pad, an upper mold base, an upper mold plate, a stop plate, an upper stripping plate (corresponding to the second upper stripping plate 36), a lower stripping plate (corresponding to the second lower stripping plate 31), a lower mold plate (corresponding to the second lower mold plate 34), a lower pad, a lower mold base, a lower pad, and a lower support plate, which are arranged in sequence from top to bottom. In the accompanying drawings, other templates are not numbered, but this does not mean that the structure of the inward folding mold 300 of the embodiment of the present application is unclear. At the same time, the inward folding mold 300 of the embodiment of the present application can also adopt other inward folding molds 300 in the prior art to meet the requirements of bending and forming C-shaped frame 008 and L-shaped frame 007.

[0039] In some embodiments, before forming the L-shaped frame 007 and the C-shaped frame 008, the inner folding mold 300 is used to puncture and form rivet holes at the preset rivet positions on the second back panel, and the second back panel with the formed rivet holes is flattened by the inner folding mold 300.

[0040] In some embodiments, a shaping mold is used to sequentially perform riveting and shaping on the third back plate, and this is achieved through the following steps:

[0041] In step 41, the third back plate is placed on the lower punch of the shaping mold, and the shaping surface of the lower punch touches the inner side surface of the accommodating cavity 017 of the third back plate, wherein the opening of the accommodating cavity 017 of the third back plate faces downward.

[0042] In this embodiment, the opening with the accommodating cavity 017 is placed facing inwards, thereby placing the third back plate on the lower punch.

[0043] Step 42, during the closing process of the transmission shaping mold, the corresponding rivets are pressed into the corresponding rivet holes of the third back panel through the upper concave mold and the lower punch of the shaping mold, and the inner and outer side surfaces of the accommodating cavity of the third back panel are flattened and shaped through the shaping surface of the upper concave mold and the shaping surface of the lower punch to obtain the display back panel.

[0044] In some of these embodiments, reference Figure 2 、 Figure 3 、 Figure 6 、 Figure 10 and Figure 11 , using the bending die 100 to synchronously move all first flanges 002 from the preset first folding line position (reference Figure 3 The dotted line 01 in the figure is beveled inward to form a hook 010 and the second flange 003 is moved from the preset second folding line position (reference Figure 3 Fold the dotted line 02) inward to form the inner fold edge 011, and achieve it through the following steps:

[0045] Step 51, after placing the first back plate 001 with the completed bevel angle on the first lower die 11 of the bending die 100, the first upper die 12 of the transmission bending die 100 drives the beveling punch 13 and the first bending knife 14 to close the mold with the first lower die 11, and makes the beveling punch 13 and the first bending knife 14 press the first flange 002 and the second flange 003 respectively, wherein the inner side of the beveling punch 13 is aligned with the first fold line position 01, and the inner side of the first bending knife 14 is aligned with the second fold line position 02.

[0046] Step 52, during the second downward movement of the beveling punch 13 and the first bending knife 14 driven by the first upper die 12, the beveling punch 13 bevels the first flange 002 inward from the first folding line position 01 to form a hook 010, and the first bending knife 14 bends the corresponding second flange 003 inward from the corresponding second folding line position 02 to form an inner folding edge 011 (refer to Figure 5State 2), wherein the angle of the hook 010 relative to the second back plate is 15° to 20°, preferably 15°, the extended length of the hook 010 is 2mm to 3mm, preferably 2mm, the inner folded edge 011 is bent 90° relative to the second back plate, and the width of the inner folded edge 011 is 2mm to 3mm, preferably 3mm.

[0047] In some embodiments, the bending die 100 further includes an upper punch 15 provided on the first upper die 12 and a lower ejector pin 16 provided on the first lower die 11, and the first back plate 001 includes a receiving cavity (refer to Figure 6 017 in the figure), punching the first back plate 001 is achieved by the following steps:

[0048] In step 61, during the process of the first upper die 12 driving the upper punch 15 to close the die relative to the first lower die 11, multiple upper punches 15 are aligned and pressed against the top surface of the accommodating cavity 017, and the lower ejector pins 16 are pressed against the bottom surface of the accommodating cavity 017, wherein the upper punches 15 and the corresponding lower ejector pins 16 are arranged opposite each other.

[0049] In step 62 , when the first upper die 12 drives the upper punch 15 to move downward for the second time, the upper punch 15 punches through the first back plate 001 and extends into the corresponding lower ejector pins 16 to form a plurality of punch holes in the accommodating cavity 017 .

[0050] In some of these embodiments, reference Figures 2 to 6 、 Figure 12 and Figure 13 The second back plate is embossed and cut using a sheeting and bending die 400, and the inner folding edge 011 is turned inward and flattened, and all first flanges 002 are turned inward from the preset third fold line position to form side folding edges 012, and this is achieved through the following steps:

[0051] Step 71, place the second back panel on the third lower strip plate 41 of the sheeting bending mold 400, and make the convex insert 42 of the sheeting bending mold 400 press against the bottom surface of the second back panel, then drive the sheeting bending mold 400 to close the mold, so as to drive the second bending knife 44 provided on the third upper strip plate 43 of the sheeting bending mold 400 to press all the first flanges 002 with the bending hook 010 and drive the cutting line insert 45 provided on the third upper strip plate 43 to press the top surface of the second back panel, wherein the second bending knife 44 is provided on both sides of the horizontal direction and the rear side of the longitudinal direction of the third upper strip plate 43, the inner side of the second bending knife 44 is aligned with the third folding line position, and the cutting line insert 45 is arranged opposite to the corresponding convex insert 42.

[0052] Step 72, when the tablet bending mold 400 is completed in the mold closing process, the convex insert 42 is inserted into the accommodating cavity of the second back plate (reference Figure 6017) in the inner portion of the convex hull, and the convex hull is flattened by cutting the line into the child 45, and all the first flanges 002 with the hooks 010 are moved from the corresponding third folding line position (reference Figure 3 Bend inwards at the dotted line 03) to form the side fold 012 (reference Figure 4 and Figure 5 State 3), wherein, after the side folding edge 012 is formed, the hook 010 of the first flange 002 (outside the side folding edge 012) is placed in the avoidance groove 401 provided on the third lower template 46 of the sheet bending mold 400, and the side folding edge 012 is bent 90° relative to the second back plate. The width of the side folding edge 012 is 12mm to 13mm. After the sheet bending mold 400 is closed, the flattening insert 47 provided on the longitudinal front side of the third lower template 46 is opposite to the inner folding edge 011.

[0053] Step 73 , the flattening insert 47 is driven to press against the inner folding edge 011 and fold it inwardly along the longitudinal direction until the inner folding edge 011 is turned inward and flattened.

[0054] In this embodiment, when the inner folded edge 011 is flattened inward (refer to Figure 5 State 3 and Figure 6 The inner curling edge 018 in the figure) forms a curling edge close to the back plate on the second flange 003.

[0055] An embodiment of the present application also provides a display back panel, which is manufactured by the display back panel molding process in the above embodiment.

[0056] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. Any appropriate changes and modifications to the above embodiments fall within the scope of the present invention as long as they are within the spirit of the present invention.

Claims

1. A display backplane forming process, characterized in that: The following steps are involved: The four sides of the back panel material of the convex bulge are trimmed to form a first back panel with flanges, wherein the flanges include first flanges located on the longitudinal rear side and the transverse sides and a second flange located on the longitudinal front side, and the first back panel has first corners remaining at at least two top corners of the longitudinal rear side; After punching the first back panel, at least two of the first corners are beveled to form corresponding beveled joints on the first flanges, and all the first flanges are simultaneously beveled inward from a preset first fold line position to form hooks, and the second flanges are folded inward from a preset second fold line position to form an inward folded edge, thereby obtaining a second back panel; After the second back panel is embossed and cut, the inner folded edge is turned inward and flattened, and all the first flanges are folded inward from the preset third fold line position to form a side folded edge, the second flange is folded inward from the preset fourth fold line position to form an L-shaped frame, and all the first flanges are folded inward from the preset fifth fold line position to form a C-shaped frame, and the C-shaped frames are corner-jointed by the beveled edge joints to obtain the third back panel; The third back panel is subjected to riveting and shaping processes in sequence to generate the display back panel.

2. The display backplane forming process according to claim 1, characterized in that: The first back panel still has second corners remaining at the two top corners on the longitudinal front side. After punching the first back panel, the following steps are also included: the two second corners are cut according to the preset first cutting line to form two outward protruding connecting parts at the position of the first back panel close to the two second corners, and the lateral sides of the second flange form L-shaped side edges and the two first flanges on the lateral sides form horizontal edges on the side away from the bevel splicing part.

3. The display back panel forming process according to claim 2, comprising a corner cutting die, characterized in that: Beveling at least two of the first corners comprises the following steps: The first back plate with the remaining first corner is placed on the first lower stripping plate of the corner cutting mold, wherein the first lower stripping plate is arranged on the first lower template of the corner cutting mold and is arranged opposite to the first upper stripping plate of the corner cutting mold, a first corner cutting insert is respectively provided at two top corner positions on the longitudinal rear side of the first upper stripping plate, a second corner cutting insert is respectively provided at two top corner positions on the longitudinal front side of the first upper stripping plate, and a first lower mold blade and a second lower mold blade are respectively provided at positions on the first lower template opposite to the first corner cutting insert and the second corner cutting insert; The corner cutting mold is driven to close the mold, and the first upper stripping plate drives the first corner cutting insert and the second corner cutting insert to press the corresponding first corner and the corresponding second corner respectively; During the second downward movement of the first upper stripping plate driving the first corner cutting insert and the second corner cutting insert, the first corner cutting insert is inserted into the corresponding first lower die blade, and the first corner is cut according to the preset second cutting line to form the bevel splicing part and the corner notch on the side of the first flange close to the first corner, and the second corner cutting insert is inserted into the corresponding second lower die blade, and the second corner is cut according to the first cutting line to form the corresponding convex connection part and the horizontal edging, wherein, after the C-shaped frame is formed, the corner notch at the same first corner position is docked, and is surrounded by the corresponding bevel splicing part and the two corresponding first flanges to form a hollow corner, and the gap formed after the two bevel splicing parts are spliced is less than 0.05mm.

4. The display back panel forming process according to claim 3, comprising an inward folding mold, characterized in that: Folding the second flange inward from a preset fourth fold line position to form an L-shaped frame and folding all the first flanges inward from a preset fifth fold line position to form a C-shaped frame, including the following steps: The second back panel that has completed the flattening of the inner folding edge and the forming of the side folding edge is placed on the second lower stripping plate of the inner folding mold, and the corresponding second flange and the corresponding first flange are placed on the first movable slide and the second movable slide of the inner folding mold respectively, wherein the second lower stripping plate is arranged on the second lower template of the inner folding mold, the longitudinal front side of the second lower template is provided with the first movable slide, the transverse sides and longitudinal rear side of the second lower template are provided with the second movable slide, the first movable slide and the second movable slide are both moved to avoid position by the inclined top of the inserting knife provided on the second lower template, and the first movable slide and the second movable slide are both provided with a clearance groove; The inner folding mold is driven to close the mold, and the second upper stripping plate of the inner folding mold is driven to drive the first inner folding knife and the second inner folding knife to press the corresponding second flange and the corresponding first flange respectively, wherein the inner side edge of the first inner folding knife is aligned with the outer side edge of the first movable slider and the fourth folding line position, and the inner side edge of the second inner folding knife is aligned with the outer side edge of the second movable slider and the fifth folding line position; During the process of the inner folding mold completing the mold closing, the first inner folding knife cooperates with the first movable slider to fold the second flange inward 90° from the fourth fold line position until it is folded into the L-shaped frame, and the second inner folding knife cooperates with the second movable slider to fold all the first flanges inward 90° from the fifth fold line position until it is folded into the C-shaped frame, wherein, when the corresponding second flange is folded inward, the inward-folded and flattened inner folding edge is located in the avoidance groove of the first movable slider that is translated to avoid position, and when the corresponding first flange is folded inward, the side folding edge with the bent hook is located in the avoidance groove of the second movable slider that is translated to avoid position, the distance between the fourth fold line position and the second fold line position is 7mm to 8mm, and the distance between the fifth fold line position and the third fold line position is 19mm to 21mm.

5. The display back panel forming process according to claim 4, characterized in that: Before forming the L-shaped frame and the C-shaped frame, the following steps are also included: using the inward folding mold to puncture and form rivet holes at the preset rivet positions of the second back panel, and flattening the second back panel with the formed rivet holes using the inward folding mold.

6. The display back panel forming process according to claim 5, comprising a shaping mold, characterized in that: The third back plate is riveted and shaped in sequence, comprising the following steps: The third back plate is placed on the lower punch of the shaping mold, and the shaping surface of the lower punch touches the inner side surface of the accommodating cavity of the third back plate, wherein the opening of the accommodating cavity of the third back plate faces downward; During the process of transmitting the shaping mold to close the mold, the corresponding rivets are pressed into the corresponding rivet holes of the third back panel through the upper concave mold and the lower punch of the shaping mold, and the inner and outer side surfaces of the accommodating cavity of the third back panel are flattened and shaped through the shaping surface of the upper concave mold and the shaping surface of the lower punch to obtain the display back panel.

7. The display back panel forming process according to claim 2, comprising a bending die, characterized in that: Synchronously beveling all the first flanges inward from a preset first fold line position to form a hook and folding the second flanges inward from a preset second fold line position to form an inner folded edge, including: After placing the first back plate with the beveled angle completed on the first lower die of the bending die, the first upper die of the bending die is driven to drive the beveling punch and the first bending knife to close the mold with the first lower die, and the beveling punch and the first bending knife are respectively pressed against the first flange and the second flange, wherein the inner side of the beveling punch is aligned with the first folding line position, and the inner side of the first bending knife is aligned with the second folding line position; During the second downward movement of the beveling punch and the first bending knife driven by the first upper die, the beveling punch bevels the first flange inward from the first fold line position to form the hook, and the first bending knife bends the corresponding second flange inward from the corresponding second fold line position to form the inner folding edge, wherein the bevel angle of the hook relative to the second back plate is 15° to 20°, the extended length of the hook is 2mm to 3mm, the inner folding edge is bent 90° relative to the second back plate, and the width of the inner folding edge is 2mm to 3mm.

8. The display back panel forming process according to claim 7, wherein the bending die further comprises an upper punch provided on the first upper die and a lower ejector pin provided on the first lower die, and the first back panel comprises a receiving cavity, characterized in that: Punching the first back plate includes the following steps: During the process of the first upper die driving the upper punches to close the die relative to the first lower die, the plurality of upper punches are aligned with and abut against the top surface of the accommodating cavity, and the lower ejector pins are abutted against the bottom surface of the accommodating cavity, wherein the upper punches and the corresponding lower ejector pins are arranged opposite each other; During the second downward movement of the upper punch driven by the first upper die, the upper punch punches through the first back plate and extends into the corresponding lower ejector pins to form a plurality of punched holes in the accommodating cavity.

9. The display back panel forming process according to claim 2, comprising a sheet pressing and bending die, characterized in that: The second back panel is subjected to embossing and cutting, the inner folding edge is turned inward and flattened, and all the first flanges are turned inward from a preset third fold line position to form a side folding edge, including the following steps: The second back plate is placed on the third lower stripping plate of the sheet-pressing and bending mold, and after the convex insert of the sheet-pressing and bending mold is pressed against the bottom surface of the second back plate, the sheet-pressing and bending mold is driven to close the mold, so as to drive the second bending knife provided on the third upper stripping plate of the sheet-pressing and bending mold to press all the first flanges provided with the bending hooks, and to drive the cutting line insert provided on the third upper stripping plate to press the top surface of the second back plate, wherein the second bending knife is provided on both sides in the transverse direction and the rear side in the longitudinal direction of the third upper stripping plate, the inner side of the second bending knife is aligned with the third folding line position, and the cutting line insert is arranged opposite to the corresponding convex insert; During the closing process of the tablet bending mold, a round convex hull is formed in the accommodating cavity of the second back plate by the convex point insert, and the round convex hull is cut and flattened by the cutting line insert, and all the first flanges provided with the hooks are bent inward from the corresponding third folding line positions by the second bending knife to form the side folded edges, wherein, after the side folded edges are formed, the hooks of the first flanges are placed in the avoidance grooves provided on the third lower template of the tablet bending mold, and the side folded edges are bent 90 degrees relative to the second back plate, and the width of the side folded edges is 12 mm to 13 mm. After the tablet bending mold is closed, the flattening insert provided on the longitudinal front side of the third lower template is opposite to the inward folded edges; The flattening insert is driven to press against the inner folded edge and fold it inwardly along the longitudinal direction until the inner folded edge is turned inward and flattened.

10. A display back panel, characterized in that: The display back panel is manufactured by the display back panel molding process according to any one of claims 1 to 9.

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