CN111167907A - Method for processing outer curled round edge of OLED backboard - Google Patents

Abstract

The invention discloses an OLED backboard outer edge rolling and wrapping processing method which comprises a punch press, a fillet bending die, a shaping die and an edge rolling die, and further comprises the following steps: the fillet bending die is driven by the punch to open/close the die and is matched with a bending punch to bend the edge of the OLED backboard by 90 degrees from the arc outwards at the arc corner through the arc outwards turning of the bending punch and the bending insert in the die closing process, and an outwards-turned side edge and a semicircular angle are formed; the corner bevel angle shaping die is driven by the punch to open/close the die and drives an inner shaping inclined block and an outer shaping inclined block arranged on a sliding block through the sliding block and shapes the inner side surface and the outer side surface of a bevel angle arranged at the tail end of the outer-rolling side folding edge respectively in the die closing process of the die; and the edge-wrapping mould is driven by the punch to open/close the mould and is matched with the lower edge-wrapping punch to turn up and fold the edge on the outer edge-folding side to form the edge-wrapping in the mould closing process.

Description

Method for processing outer curled round edge of OLED backboard

Technical Field

The invention relates to the field of television backboard processing, in particular to a method for processing an external curled round edge of an OLED backboard.

Background

In the prior art, referring to fig. 1, the outer edge curl processing from state a to state b is often required to be performed on the periphery of the OLED television back plate. In the prior art, the process of finishing the machining is as follows: bending in the state a, and then wrapping the edge to the state b in a rolling way. In the prior art, the process of finishing the edge wrapping process of the edge rolling has the following defects: the product formed by rolling has serious scratch on the appearance and obvious cracks, the yield is low during the stamping production of the OLED television backboard, and the appearance of the OLED television backboard is rough after the paint baking.

In the related art, a better technical scheme for solving the problems is still lacking.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a method for processing the outer edge of the OLED backboard, so that the OLED TV backboard with few cracks is processed, the processing efficiency is high, and the quality of the OLED TV backboard is high.

In order to solve the technical problem, the invention adopts the following technical scheme that the method for processing the outer edge rolling and wrapping of the OLED backboard comprises a punch press, a fillet bending die, a shaping die and an edge rolling die, and further comprises the following steps:

step A, the fillet bending die is driven by the punch to open/close the die and is matched with a bending punch to bend the edge of the OLED backboard from the arc turning angle outwards by 90 degrees in an arc turning way through the bending punch and a bending insert in the die closing process, and an outward-rolling side folding edge and a semicircular angle are formed;

b, the corner bevel angle shaping mold is driven by the punch to open/close the mold and drives an inner shaping inclined block and an outer shaping inclined block which are arranged on a sliding block through the sliding block and shapes the inner side surface and the outer side surface of a bevel angle arranged at the tail end of the outer-rolling side folded edge respectively in the mold closing process;

and step C, the edge rolling and covering is carried out, the edge rolling die is driven by the punch to open/close the die, and in the die closing process, the upper edge rolling insert of the edge rolling die is matched with the lower edge rolling punch to carry out inward edge rolling and folding on the outer edge rolling side folded edge to form the covered edge.

As a further elaboration of the above technical solution:

in the above technical solution, the round corner bending of step a includes:

a1, placing the OLED backboard on a lower stripper plate of a lower die of a fillet bending die, enabling the bending insert to be supported at an arc corner of the edge wrapping part of the OLED backboard, and driving an upper die of the fillet bending die to move towards the lower die by the punch press, so that an upper die plate of the upper die, an upper die plate insert and the bending punch press the OLED backboard;

a2, extruding the edge covering part of the OLED backboard by the bending punch in the process that the punch conveys the upper die to move downwards for the second time, turning the edge covering part of the OLED backboard outwards and bending the edge covering part of the OLED backboard 90 degrees from the arc corner by matching with the jacking of the bending insert, and forming an outer-rolling side folding edge and a semi-circular angle.

In the technical scheme, in the step a, the bending insert is provided with a semi-circular protrusion which supports the circular arc corner, the upper template insert is provided with an inward concave unfilled corner matched with the outer side surface of the circular arc corner, the semi-circular protrusion is supported on the circular arc corner in an inward supporting manner, the circular arc corner is pressed and buckled by matching with the inward concave unfilled corner, and the bending punch can be matched with the outward-rolling side folded edge and the semi-circular corner.

In the above technical solution, after the step a2, the processing method further includes:

a3, the punch drives the fillet bending die to open the die and drive the bending punch to retreat, the bending outer stripper plate arranged on the lower die is driven by a spring to move upwards vertically and pushes the OLED backboard which finishes fillet bending relative to the bending insert and the lower stripper plate.

In the above technical solution, the corner bevel shaping of step B includes:

b1, reversely placing the OLED back plate formed with the outward-rolling side edge folds and the semi-circular corners on a lower stripping plate of a lower die set of the shaping die and pushing the OLED back plate into a sub-jacking seat by a lower supporting plate arranged on the side of the lower stripping plate, wherein the punch drives an upper die set of the shaping die to move towards the lower die set and enables an upper stripping plate of the upper die set, the sliding block and the inner shaping inclined block to press the reversely placed OLED back plate;

b2, the punch press conveys the upper die set to move downwards for the second time, the sliding block is pushed by a lower slotting tool arranged on the lower die set to slide, the sliding block can drive the inner shaping inclined block to slide outwards and push against the inner side face of the bevel angle at the tail end of the outer-rolling side folding edge and/or can drive the outer shaping inclined block to slide inwards and push against the outer side face of the bevel angle at the tail end of the outer-rolling side folding edge, and the shaping of the bevel angle at the tail end of the outer-rolling side folding edge is completed after matching.

In the technical scheme, in the step B, the inner shaping inclined block is provided with a convex shaping inclined protrusion, the outer shaping inclined block is provided with a shaping inclined surface matched with the outer side surface of the inclined angle at the tail end of the outward-turning side folded edge, the outer shaping inclined block is further connected with the sliding block through an outer sliding block and a side locking spring, and the outer sliding block and the sliding block are both provided with inclined surfaces used for inclined top matching of the lower slotting tool.

In the above technical solution, after the step B2, the processing method further includes:

b3, the punch drives the shaping die to open the die, the lower slotting tool is separated from the sliding block and the outer sliding block, the sliding block drives the inner shaping inclined block and the outer shaping inclined block to retreat inwards and outwards respectively and enables the inner shaping inclined block and the outer shaping inclined block to be away from the outer-rolling side edge, and a lower clamping plate of the lower die set drives the lower stripper plate to move upwards vertically and jack up the OLED backboard.

In the above technical solution, the edge wrapping step C includes:

c1, placing the shaped OLED backboard on a lower stripping plate of the rounding die, which can float and move, and driving a top die of the rounding die to move towards a bottom die of the rounding die by the punch press so that an upper stripping plate of the top die presses the OLED backboard and the upper rounding insert is pressed and buckled on the semi-circular angle;

c2, the punch press drives the top die to move downwards for two times and pushes the OLED backboard and the lower supporting plate to move vertically downwards until the outward-turned side folding edge contacts the lower rolling punch and the lower rolling punch carries out inward rolling and folding on the oblique angle at the tail end of the outward-turned side folding edge to form a rolling edge.

In the technical scheme, the upper edge-curling insert is provided with a protection groove matched with the semicircular angle structure, the lower edge-curling punch is provided with a semicircular arc forming groove, and the semicircular arc forming groove is used for inwards curling and folding the oblique angle at the tail end of the outwards-turned side edge into a curled edge.

In the above technical solution, after the step C2, the processing method further includes:

c3, the punch press transmission the edge rolling mould die sinking and drive the top mould with go up the edge rolling income son and go up to take shape and walk back, the lower plate of die block rebound under spring drive and drive the lower stripper is vertical to be shifted up, the lower stripper is vertical to be shifted up and will accomplish the edge rolling bound OLED backplate jack-up with the edge rolling drift separation down with make the edge rolling bound ejecting semicircle shaping groove.

The processing method has the beneficial effects that the edge wrapping part of the back plate of the OLED television is turned outwards and bent from the arc corner of the edge wrapping part to form the turning-outwards side folding edge and the semicircular corner, then the tail end oblique angle of the turning-outwards side folding edge is shaped, and then the turning-outwards side folding edge is bent and rolled to form the rolling edge wrapping part.

Drawings

FIG. 1 is a view of the state of an OLED backplane before and after edge wrapping;

FIG. 2 is a flow chart of the process of the present invention;

FIG. 3 is a view of the state of the OLED backplane during processing by the process of the present invention;

FIG. 4 is a state diagram of the round corner bending die of the invention when the die is closed;

FIG. 5 is a state diagram of the round corner bending die of the invention when the die is opened;

FIG. 6 is a view showing the state of the reforming mold of the present invention when it is closed;

FIG. 7 is a view showing the open state of the reforming mold according to the present invention;

FIG. 8 is a view showing the state of the rolling die of the present invention when the die is closed;

FIG. 9 is a view showing the state of the rolling die of the present invention when it is opened.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

FIG. 2 is a flow chart of the processing method of the present invention, and FIG. 3 is a view showing the state of the OLED backplane during the processing of the processing method of the present invention. Referring to fig. 2 to 9, the method for processing the outer edge curl of the OLED backplane according to the embodiment of the present invention includes a punch (not shown in the drawings), a round corner bending mold 100, a shaping mold 200, and a rounding mold 300, and further includes the following steps:

step S01, the fillet bending die 100 is driven by the punch press to open/close the die and in the die closing process, a bending punch 11 of the die is matched with a bending insert 12 to bend an edge wrapping portion 002 (refer to a state (1) in the attached drawing) of the OLED backboard 001 from an arc turning angle 003 of the die by turning outwards for 90 degrees, and an outward-rolling side folding edge 004 and a semi-fillet 005 (refer to a state (2) in the attached drawing) are formed; in step S01, the semicircular corner 005 is formed such that, in the process that the bending punch 11 bends the edge-covering part 002 of the OLED backplane 001 outward from the arc corner 003 thereof by 90 degrees, the arc is bent to form 1/4 rounded corners, and then the 1/4 rounded corners of the arc corner 003 of the OLED backplane 001 are matched to form the semicircular corner 005;

step S02, the corner bevel angle shaping die 200 is driven by the punch to open/close the die and during the closing process, the slide block 21 drives the inner shaping inclined block 22 and the outer shaping inclined block 23 mounted on the slide block 21 and shapes the inner side surface and the outer side surface of the bevel 006 arranged at the end of the outer-rolling side folding edge 004 respectively (refer to state (3) in fig. 3); the shaping means that the inner side surface and the outer side surface of the bevel 006 are flattened by the extrusion of the inner shaping inclined block 22 and the outer shaping inclined block 23;

step S03, carrying out die opening/closing by the punch press, and in the die closing process of the die 300, carrying out inward-turning folding on the outward-turning side folded edge 004 by the upper-turning in piece 31 of the die 300 in cooperation with the lower-turning punch 32 to form the folded edge 007 (refer to state (4) in fig. 3), in practice, the outward-turning side folded edge 004 is inward-turned and folded by the upper-turning in piece 31 through injecting and pressing the half fillet 005, and the downward-turning punch 32 is used for inward-turning the oblique angle 006 inward-turning arc into the turned edge 007 by using the forming groove of the formed turned edge when the upper-turning in piece 31 extrudes the OLED backplane 001.

It is understood that in one embodiment, referring to fig. 2-5, the round corner bending in step S01 can be performed by the following steps:

step S01-1, placing an OLED (organic light emitting diode) back plate 001 on a lower stripping plate 14 of a lower die 13 of a fillet bending die 100, enabling a bending insert 12 to be supported at an arc corner 003 of a wrapping edge part of the OLED back plate 001, and driving an upper die 15 of the fillet bending die 100 to move towards the lower die 13 by a punch press, so that an upper die plate 16, an upper die plate insert 17 and a bending punch 11 of the upper die 15 press the OLED back plate 001;

step S01-2, the bending punch 11 extrudes the edge covering part 002 of the OLED backboard 001 in the process that the punch press conveys the upper die 15 to move downwards for two times, and the edge covering part 002 of the OLED backboard 001 is turned outwards and bent for 90 degrees from the arc corner 003 of the edge covering part 002 by matching with the jacking of the bending punch 12, and an outward-rolling side folding edge 004 and a semicircular angle 005 are formed.

It should be noted that, in the fillet bending process: the upper die 15 moves downwards and presses the OLED backboard 001 when contacting the lower die 13 and the lower stripper plate 14; the punch press continues to move downwards to a certain stroke, the bending punch 11 moves downwards to press the bending outer stripper 18 of the lower die 13 to move downwards together to bend the edge covering part 002 of the OLED backboard 001, meanwhile, a stop block 19 is further arranged on the lower die 13, the bending outer stripper 18 needs to move inwards and transversely in the fillet bending process, a step 191 on the stop block 19 is matched with an oblique notch 181 of the bending outer stripper 18 to perform oblique pushing transmission and blocking, and the punch press continues to move downwards to a certain stroke, the bending outer stripper 18 can move inwards and transversely until the fillet is bent.

It can be understood that, in an alternative embodiment, in step S01, the bending punch 12 is provided with a semicircular protrusion 121 for supporting the arc corner 003, the upper template punch 17 is provided with an inward concave notch 171 adapted to an outer side surface of the arc corner 003, the semicircular protrusion 121 is supported by the arc corner 003 and is matched with the inward concave notch 171 to press and buckle the arc corner 003, so that the bending punch 11 can form the outward rolling side folded edge 004 and the semicircular corner 005; the semicircular bulge 121 is used for forming a semicircular angle 005 at the joint of the outer-rolling side folded edge 004 and the arc corner 003 along the structural arc surface in the process of bending the outer-rolling side folded edge 004 by the bending punch 11 at 90 degrees, and simultaneously supports the edge covering part 002 so that the edge covering part 002 can be bent when the bending punch 11 is pressed downwards.

It is understood that in one alternative embodiment, after completing step S01-2, the following steps are performed:

and step S01-3, the punch drives the fillet bending die 100 to open the die and drives the bending punch 11 to retreat, the bending outer stripper plate 18 arranged on the lower die 13 is driven by the spring 110 to move upwards vertically and pushes the OLED backboard 001 which finishes fillet bending relative to the bending insert 12 and the lower stripper plate 14, and thus stripping is finished. In practice, bending forming is completed, a punch moves upwards, the fillet bending die 100 is opened upwards, the bending outer stripper 18 moves upwards along with the bending punch 11, the bending outer stripper 18 moves upwards to a certain stroke, the bending outer stripper 18 moves outwards and transversely (before the bending outer stripper 18 moves upwards to a certain stroke, the side wall above the oblique notch 181 of the bending outer stripper 18 is blocked by the side wall below the step 191 of the stopper 19, the bending outer stripper 18 presses the outward-turned side folded edge 004 and only moves vertically, when the bending outer stripper 18 moves upwards to the position that the oblique notch 181 of the bending outer stripper 18 is in contact with the step 191 of the stopper 19, the bending outer stripper 18 can move outwards and transversely, so that the bending outer stripper 18 is separated from the OLED backboard 001 which is bent at a fillet, and the appearance shape of the OLED backboard 001 is guaranteed.

It is to be understood that in one embodiment, referring to fig. 2-3 and fig. 6-7, the corner bevel shaping in step S02 can be accomplished by:

step S02-1, placing the OLED backboard 001 formed with the outward-rolling side folding 004 and the semicircular angle 005 in the reverse direction (the bevel 006 of the outward-rolling side folding 004 faces upwards relative to the lower module 24 of the shaping mold 200) on the lower stripper 25 of the lower module 24 of the shaping mold 200 and jacking the lower stripper 26 arranged at the side of the lower stripper 25, and driving the upper module 27 of the shaping mold 200 to move towards the lower module 24 by the punch press so that the upper stripper 28 of the upper module 27, the slide block 21 and the inner shaping oblique block 22 press the OLED backboard 001 placed in the reverse direction;

step S02-2, the punch press transmits the upper die set 27 to move down for the second time, the slide block 21 is pushed by the lower slotting tool 29 arranged on the lower die set 24 to slide, the slide block 21 can drive the inner shaping inclined block 22 to slide outwards and push against the inner side surface of the bevel 006 at the tail end of the outer rolling side folding edge 004 and/or can drive the outer shaping inclined block 23 to slide inwards and push against the outer side surface of the bevel 006 at the tail end of the outer rolling side folding edge 004, and the shaping of the bevel 006 at the tail end of the outer rolling side folding edge 004 is completed after matching.

It should be noted that, during oblique angle shaping, the upper module 27 moves downward, and when contacting the lower module 24, the OLED backplane 001 placed in the reverse direction and having the outward-rolling side folded edge 004 and the semicircular angle 005 is pressed, the punch press continues to move downward for a certain distance, the lower slotting tool 29 contacts the slider 21, the shaping die 200 is closed, and the lower slotting tool 29 is inserted into the slider 21 so that the slider 21 drives the inner shaping inclined block 22 and the outer shaping inclined block 23 to shape the oblique angle 006 of the OLED backplane 001.

It is understood that in an alternative embodiment, in step S02, the inner shaping swash block 22 is formed with a convex shaping swash protrusion 221, the outer shaping swash block 23 is provided with a shaping inclined surface 231 matched with the outer side surface of the bevel 006 at the end of the everting side folding 004, the outer shaping swash block 23 is further connected with the slide block 21 through an outer slide block 201 and a side locking spring 202, and the outer slide block 201 and the slide block 21 are both provided with an inclined surface 211 matched with the lower slotting cutter 29.

It is understood that in one alternative embodiment, after completing step S02-2, the following steps are performed:

step S02-3, the punch drives the shaping die 200 to open the die, the lower slotting tool 29 is separated from the slide block 21 and the outer slide block 201, the slide block 21 drives the inner shaping inclined block 23 and the outer shaping inclined block 24 to retreat inwards and outwards respectively, the inner shaping inclined block 23 and the outer shaping inclined block 24 are far away from the outer-rolling side folded edge 004, and the lower clamping plate 203 of the lower die set 24 drives the lower stripper plate 25 to move upwards vertically and jack up the OLED back plate 001 and remove the material after shaping.

It is to be understood that in one embodiment, referring to fig. 2-3 and fig. 8-9, the edge wrapping at step S03 can be accomplished by the following steps:

step S03-1, placing the shaped OLED backplane 001 on the lower stripper plate 33 of the rounding die 300, which is capable of floating, and driving the top die 34 of the rounding die 300 to move toward the bottom die 35 of the rounding die 300 by the punch press, so that the upper stripper plate 36 of the top die 34 presses the OLED backplane 001 and the upper rounding insert 31 presses and buckles the half-round corner 005;

step S03-2, the punch press drives the top die 34 to move downwards for two times and pushes the OLED back plate 001 and pushes the lower supporting plate 33 to move vertically downwards until the outward-turned side folding edge 004 contacts the lower rolling punch head 32, and the lower rolling punch head 32 performs inward rolling and folding on the oblique angle 006 at the tail end of the outward-turned side folding edge 004 to form a rolling edge 007.

It should be noted that the top mold 34 moves downward, when contacting the bottom mold 35, the OLED backplane 001 is pressed, the upper rolling insert 31 has a protection groove 311 to protect a semi-circular corner 005 formed by bending, the OLED backplane 001 is prevented from rolling to generate an upward reverse thrust to influence the appearance of the OLED backplane 001, the punch press continues to move downward for a certain stroke, a sliding block (not shown in the drawing) of the bottom mold 35 is closed, the sliding block protects the side surface of the OLED backplane 001 to prevent the OLED backplane 001 from rolling to deform, the punch press continues to move downward until the OLED backplane 001 contacts the lower rolling punch 32, the outward-turned side folding edge 004 of the OLED backplane 001 starts to be rolled and formed, the lower rolling punch 32 is processed smoothly, and a smooth part is connected between the upper rolling insert 31 and the lower rolling punch 32 to prevent the appearance of the OLED backplane 001 from being scratched during rolling.

It is understood that in one alternative embodiment, in step S03, the upper edge rolling insert 31 is provided with a protection groove 311 matching with the structure of the half round corner 005, and the lower edge rolling punch 32 is provided with a half-arc forming groove 321, and the half-arc forming groove 321 is used for forming the bevel inside edge rolling of the end of the outside edge folding into the edge rolling wrapping 007.

It is understood that in one alternative embodiment, after completing step S03-2, the following steps are performed:

step S03-3, the punch presses the edge rolling die 300 to open the die and drives the top die 34 and the upper edge rolling insert 31 to move back upwards, the lower clamping plate 37 of the bottom die 35 moves upwards under the drive of a spring (not numbered in the drawing) and drives the lower stripper plate 33 of the edge rolling die 300 to move upwards vertically, the lower stripper plate 33 moves upwards vertically and lifts the OLED back plate 001 completing edge rolling and wrapping to be separated from the lower edge rolling punch 32, and the edge rolling wrapping 007 is pushed out of the semi-circular arc forming groove 321.

The processing method comprises the steps of firstly turning up and bending the edge wrapping part of the OLED television backboard from the arc corner to form an outward turning side folding edge and a semicircular corner, then shaping the tail end oblique angle of the outward turning side folding edge, then bending and bending the outward turning side folding edge to form a curled edge wrapping, and separating three processes to form the product without scratching in appearance and high in yield and efficiency of stamping mass production.

The technical scope of the present invention is not limited to the above embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims (10)

1. The outer edge rolling and edge covering processing method of the OLED backboard comprises a punch press, a fillet bending die, a shaping die and an edge rolling die, and is characterized by further comprising the following steps:

step A, the fillet bending die is driven by the punch to open/close the die and is matched with a bending punch to bend the edge of the OLED backboard from the arc turning angle outwards by 90 degrees in an arc turning way through the bending punch and a bending insert in the die closing process, and an outward-rolling side folding edge and a semicircular angle are formed;

b, the corner bevel angle shaping mold is driven by the punch to open/close the mold and drives an inner shaping inclined block and an outer shaping inclined block which are arranged on a sliding block through the sliding block and shapes the inner side surface and the outer side surface of a bevel angle arranged at the tail end of the outer-rolling side folded edge respectively in the mold closing process;

and step C, the edge rolling and covering is carried out, the edge rolling die is driven by the punch to open/close the die, and in the die closing process, the upper edge rolling insert of the edge rolling die is matched with the lower edge rolling punch to carry out inward edge rolling and folding on the outer edge rolling side folded edge to form the covered edge.

2. The method for processing the outer edge of the OLED back plate by rolling according to claim 1, wherein the step A of bending the round corner comprises the following steps:

a1, placing the OLED backboard on a lower stripper plate of a lower die of a fillet bending die, enabling the bending insert to be supported at an arc corner of the edge wrapping part of the OLED backboard, and driving an upper die of the fillet bending die to move towards the lower die by the punch press, so that an upper die plate of the upper die, an upper die plate insert and the bending punch press the OLED backboard;

a2, extruding the edge covering part of the OLED backboard by the bending punch in the process that the punch conveys the upper die to move downwards for the second time, turning the edge covering part of the OLED backboard outwards and bending the edge covering part of the OLED backboard 90 degrees from the arc corner by matching with the jacking of the bending insert, and forming an outer-rolling side folding edge and a semi-circular angle.

3. The method as claimed in claim 2, wherein in step a, the bending insert is provided with a semi-circular protrusion for supporting the arc corner, the upper mold plate insert is provided with an inward concave notch adapted to the outer side surface of the arc corner, the semi-circular protrusion is supported on the arc corner, and the arc corner is pressed and fastened by matching with the inward concave notch, so that the bending punch can form the outward-rolling side edge and the semi-circular corner.

4. The method of claim 3, wherein after step A2, the method further comprises:

a3, the punch drives the fillet bending die to open the die and drive the bending punch to retreat, the bending outer stripper plate arranged on the lower die is driven by a spring to move upwards vertically and pushes the OLED backboard which finishes fillet bending relative to the bending insert and the lower stripper plate.

5. The method of claim 1, wherein the corner bevel shaping step comprises:

b1, reversely placing the OLED back plate formed with the outward-rolling side edge folds and the semi-circular corners on a lower stripping plate of a lower die set of the shaping die and pushing the OLED back plate into a sub-jacking seat by a lower supporting plate arranged on the side of the lower stripping plate, wherein the punch drives an upper die set of the shaping die to move towards the lower die set and enables an upper stripping plate of the upper die set, the sliding block and the inner shaping inclined block to press the reversely placed OLED back plate;

b2, the punch press conveys the upper die set to move downwards for the second time, the sliding block is pushed by a lower slotting tool arranged on the lower die set to slide, the sliding block can drive the inner shaping inclined block to slide outwards and push against the inner side face of the bevel angle at the tail end of the outer-rolling side folding edge and/or can drive the outer shaping inclined block to slide inwards and push against the outer side face of the bevel angle at the tail end of the outer-rolling side folding edge, and the shaping of the bevel angle at the tail end of the outer-rolling side folding edge is completed after matching.

6. The method as claimed in claim 5, wherein in step B, the inner shaping wedge is formed with a convex shaping oblique protrusion, the outer shaping wedge is formed with a shaping oblique surface matching with the outer side surface of the oblique angle at the end of the outward-turned side folding edge, the outer shaping wedge is further connected with the sliding block through an outer sliding block and a side locking spring, and the outer sliding block and the sliding block are both provided with oblique surfaces for matching with the oblique top of the lower slotting tool.

7. The method of claim 6, wherein after step B2, the method further comprises:

b3, the punch drives the shaping die to open the die, the lower slotting tool is separated from the sliding block and the outer sliding block, the sliding block drives the inner shaping inclined block and the outer shaping inclined block to retreat inwards and outwards respectively and enables the inner shaping inclined block and the outer shaping inclined block to be away from the outer-rolling side edge, and a lower clamping plate of the lower die set drives the lower stripper plate to move upwards vertically and jack up the OLED backboard.

8. The method of claim 1, wherein the edge wrapping process of step C comprises:

c1, placing the shaped OLED backboard on a lower stripping plate of the rounding die, which can float and move, and driving a top die of the rounding die to move towards a bottom die of the rounding die by the punch press so that an upper stripping plate of the top die presses the OLED backboard and the upper rounding insert is pressed and buckled on the semi-circular angle;

c2, the punch press drives the top die to move downwards for two times and pushes the OLED backboard and the lower supporting plate to move vertically downwards until the outward-turned side folding edge contacts the lower rolling punch and the lower rolling punch carries out inward rolling and folding on the oblique angle at the tail end of the outward-turned side folding edge to form a rolling edge.

9. The method as claimed in claim 8, wherein the upper edge rolling insert is provided with a protection groove matching with the semi-circular corner structure, and the lower edge rolling punch is provided with a semi-circular arc forming groove for inward folding the bevel at the end of the outward folded side edge into the edge rolling.

10. The method of claim 9, wherein after step C2, the method further comprises:

c3, the punch press transmission the edge rolling mould die sinking and drive the top mould with go up the edge rolling income son and go up to take shape and walk back, the lower plate of die block rebound under spring drive and drive the lower stripper is vertical to be shifted up, the lower stripper is vertical to be shifted up and will accomplish the edge rolling bound OLED backplate jack-up with the edge rolling drift separation down with make the edge rolling bound ejecting semicircle shaping groove.

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