Curved-surface back plate forming die

Abstract

The utility model discloses a curved surface back plate forming die, which comprises a lower die, an upper die and a flat plate, the lower die is a convex arc seat, the middle part of the convex arc seat is a convex peak, the convex arc seat is a first horizontal plane on the peripheral side of the convex peak, the first horizontal plane is provided with a plurality of vertically sliding support pillars, and the support pillars are distributed along preset positions. The upper die is provided with a concave arc punching seat matched with the convex arc seat, a second horizontal plane matched with the first horizontal plane is arranged at the position, located on the peripheral side of the concave arc punching seat, of the upper die, and the flat plate extends to the position of the first horizontal plane; when the upper die and the lower die are in a die opening state, the upper end face of the jacking column is flush with the convex peak, and the lower wall of the flat plate is attached to the upper end of the jacking column and the convex peak. When the upper die and the lower die are assembled, the flat plate is supported through the cooperation of the jacking column and the upper die, the flat plate is gradually bent into a curved-surface back plate, and damage or wrinkles caused by an existing direct bending mode are effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of curved screen processing equipment, especially to a curved backboard forming die. BACKGROUND

[0002] The main supporting part in the existing curved screen is the curved backboard, which plays a role of bearing and protecting the screen, so the stability and supportability of its structure are one of the structural keys of the curved screen.

[0003] The existing curved screen generally comprises a bottom plate and a folded edge arranged at the outer periphery of the bottom plate, and the bottom plate is further provided with concave-convex grooves to install predetermined electronic components and provide predetermined support for the curved panel.

[0004] The existing curved screen generally adopts a pre-cut plate body, which is first bent and then the folded edge is bent, but in actual processing, the plate body is often wrinkled when being bent due to the influence of the curved panel, and the main reasons are: 1. The plate body corresponds to the forming die one-to-one, so the tolerance interval is small, although the processing stability is ensured, but the deviation is large, which affects the processing efficiency; 2. In the processing process of the straight plate, displacement often occurs due to the influence of support and bending, and the single smooth panel body often has stress rebound after forming, which affects the product quality. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a curved backboard forming die, which aims to improve the processing scheme, so that the size of the plate body is larger than the actual size of the curved plate, and then the cutting is carried out after integrated forming, and the rib position is formed at the predetermined position, which improves the structural stability of the curved plate, reduces stress rebound and reduces stress error.

[0006] To achieve the above purpose, the utility model provides a curved backboard forming die, which comprises:

[0007] The lower die is a convex arc seat, the middle part of the convex arc seat is a convex peak, the outer peripheral side of the convex arc seat at the convex peak is a first horizontal surface, the first horizontal surface is provided with a vertical sliding top column, and the top column is provided with a plurality of top columns and is distributed along the predetermined position;

[0008] The upper die is provided with a concave arc punch seat matched with the convex arc seat, and the outer peripheral side of the upper die at the concave arc punch seat is provided with a second horizontal surface matched with the first horizontal surface;

[0009] The flat plate extends to the position of the first horizontal surface;

[0010] When the upper die and the lower die are in the open mold state, the upper end surface of the top column is flush with the convex peak, and the lower wall of the flat plate is attached to the upper end of the top column and the convex peak.

[0011] In the preliminary bending stamping, the flat plate is supported by the convex peak of the convex arc seat and the upper end of the top post first, so that when the upper die and the lower die are closed, the flat plate is supported by the cooperation of the top post and the upper die, and the flat plate is gradually bent into a curved back plate, thereby effectively avoiding damage or wrinkles caused by the existing direct bending mode;

[0012] At the same time, in actual design, the area of the flat plate is larger than that of the curved back plate, so that the deformation pressure (i.e. the wrinkling pressure) can be decomposed to the redundant position. When the flat plate is bent into a curved back plate, the redundant part is in the wrinkling area, which is removed by cutting, thereby reducing the design difficulty of the mold, and improving the production qualified rate;

[0013] That is, the top post can gradually descend until the convex arc seat and the concave arc punch seat are matched, realizing the gradual bending process. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a lower die schematic view of the utility model;

[0015] Figure 2 It is a sectional view of the utility model

[0016] Figure 3 It is a first die stamping product schematic view of the utility model;

[0017] Figure 4 It is a second die schematic view;

[0018] Figure 5 It is a second die sectional view;

[0019] Figure 6 It is a product finished product drawing.

[0020] In the drawings,

[0021] 1 is a lower die, 10 is a convex arc seat, 11 is a convex peak,

[0022] 101 is a first horizontal plane, 102 is a second horizontal plane,

[0023] 3 is an upper die, 31 is a concave arc punch seat,

[0024] 4 is a flat plate, 41 is a wrinkling area, 40 is a curved back plate,

[0025] 5 is a molding surrounding part, 51 is a convex rib,

[0026] 61 is a guide hole, 62 is a top post, 63 is a top spring,

[0027] 71 is a transverse convex strip, 72 is a vertical convex strip,

[0028] 8 is a side stop block,

[0029] 200 is the second mold. Detailed Implementation

[0030] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0031] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0033] like Figures 1 to 6 As shown, a curved backplate forming mold includes:

[0034] The lower mold 1 is a convex arc seat 10. The middle part of the convex arc seat 10 is a convex peak 11. The outer periphery of the convex arc seat 10 is a first horizontal surface 101. The first horizontal surface 101 is provided with vertically sliding top pillars 62. Multiple top pillars 62 are provided and distributed along a predetermined position.

[0035] The upper mold 3 is provided with a concave arc punch seat 31 that cooperates with the convex arc seat 10. The upper mold 3 is provided with a second horizontal surface 102 that cooperates with the first horizontal surface 101 on the outer periphery of the concave arc punch seat 31.

[0036] Flat plate 4, the dimensions of which extend to the position of the first horizontal plane 101;

[0037] When the upper die 3 and the lower die 1 are in the open mold state, the upper end surface of the top column 62 is flush with the convex peak 11, and the lower wall of the flat plate 4 is attached to the upper end of the top column 62 and the convex peak 11.

[0038] In the preliminary bending stamping, the flat plate 4 is first supported by the convex peak 11 of the convex arc seat 10 and the upper end of the top column 62, so that when the upper die 3 and the lower die 1 are closed, the flat plate 4 is gradually bent into a curved back plate by the cooperation of the top column 62 and the upper die 3, thereby avoiding damage or wrinkles caused by the existing direct bending method.

[0039] At the same time, in actual design, the area of the flat plate 4 is larger than the area of the curved back plate, so that the deformation pressure (i.e. the wrinkling pressure) can be decomposed to the excess position. After the flat plate 4 is bent into a curved back plate, the excess part is in the wrinkling area 41, which is removed by cutting, thereby reducing the design difficulty of the mold and improving the production yield.

[0040] That is, the top column 62 can gradually descend until the convex arc seat 10 and the concave arc punch seat 31 are matched, realizing the gradual bending process.

[0041] Specifically, the outer peripheral wall of the convex arc seat 10 is provided with a convexly formed molding surrounding part 5, which is used for forming a convex rib 51 of the curved back plate, wherein the outer peripheral wall of the convex rib 51 is also provided with a hem, and the excess position extends out of the hem. In actual processing, the hem is bent and then cut to provide more modification intervals.

[0042] In the embodiment of the utility model, the top column 62 is arranged at the outer peripheral side position of the molding surrounding part 5.

[0043] Specifically, the top column 62 is arranged at the corner end position of the molding surrounding part 5 and is adjacent to two, and the top column 62 is provided with four groups, that is, only the corner end of the flat plate 4 needs to be supported in actual support, thereby realizing the bending process of the flat plate 4 and reducing displacement.

[0044] In the embodiment of the utility model, the cross section of the top column 62 is rectangular, and the two corner ends of the inner side of the top column 62 are provided with 45-degree chamfers, wherein the chamfers can ensure the stability of sliding.

[0045] Specifically, the lower die 1 is provided with a guide hole 61, the top column 62 is slidably installed in the guide hole 61, and a top spring 63 is arranged between the guide hole 61 and the top column 62, thereby realizing the support and gradual descent of the flat plate 4, and the material of the top spring 63 can be customized according to actual needs.

[0046] In the embodiment of the utility model, the lower die 1 is provided with a guide pillar on the outer circumferential side of the top column 62, the upper die 3 is provided with a guide sleeve matched with the guide pillar, thereby realizing the stable stamping between the upper die 3 and the lower die 1.

[0047] Specifically, the middle part of the convex arc seat is provided with two transverse convex strips 71 distributed along the length thereof, a plurality of vertical convex strips 72 are arranged between the two transverse convex strips, thereby the curved panel reinforcing rib can be formed, the deformation of the curved panel caused by stress after die opening is reduced, the structural strength and processing stability are improved, the processing precision is improved, and in actual processing, the deformation value should be less than 1mm, and the deformation difference can be gradually adjusted in subsequent multiple sets of molds.

[0048] In the embodiment of the utility model, the lower die 1 is further provided with a side stopper 8, the side stopper 8 is used for limiting the outer side end of the flat plate 4, thereby avoiding displacement during preliminary stamping, and improving the structural stability.

[0049] The second set of molds are mainly used for stamping hole positions, edge bending structures and the like, in the second working process, the already bent plate surface is placed in the second set of molds, and then a plurality of sliding stamping structures are used to realize stamping at different positions.

[0050] The above only describes the preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation, direct / indirect application in other related technical fields under the utility model concept of the utility model, and the contents of the utility model specification and drawings are included in the patent protection range of the utility model.

Claims

1. A forming mold for a curved back panel, characterized by, The utility model relates to a mould for manufacturing curved backboard, which comprises: a lower mould, which is a convex arc seat, the middle part of the convex arc seat is a convex peak, the outer peripheral side of the convex arc seat is a first horizontal plane, the first horizontal plane is provided with a vertical sliding top post, the top post is provided with a plurality of top posts and is distributed along a predetermined position; an upper mould, which is provided with a concave arc punch seat matched with the convex arc seat, the outer peripheral side of the concave arc punch seat of the upper mould is provided with a second horizontal plane matched with the first horizontal plane; a flat plate, which is extended to the position of the first horizontal plane in size; when the upper mould and the lower mould are in the open mould state, the upper end surface of the top post is flush with the convex peak, and the lower wall of the flat plate is attached to the upper end of the top post and the convex peak.

2. The forming mold for a curved backsheet according to claim 1, wherein: The outer peripheral wall of the convex arc seat is provided with a convexly formed forming surrounding part, and the forming surrounding part is used for forming the convex rib of the curved backboard.

3. The forming mold for a curved backsheet according to claim 2, wherein: The top post is arranged at the outer peripheral side position of the forming surrounding part.

4. The forming mold for a curved backsheet according to claim 3, wherein: The top post is arranged at the corner end position of the forming surrounding part, and two top posts are arranged adjacent to each other, and the top post is provided with four groups.

5. The curved back panel forming mold of claim 1, wherein: The cross section of the top post is in a rectangular shape, and the two corner ends of the inner side of the top post are provided with a 45-degree chamfer.

6. The forming mold for a curved backsheet as claimed in claim 3, wherein: The lower mould is provided with a guide hole, the top post is slidably arranged in the guide hole, and a top spring is arranged between the guide hole and the top post.

7. The forming mold for a curved backsheet as claimed in claim 3, wherein: The lower mould is provided with a guide column at the outer peripheral side of the top post, and the upper mould is provided with a guide sleeve matched with the guide column.

8. The forming mold for a curved backsheet as defined in claim 3, wherein: The middle part of the convex arc seat is provided with two transverse convex strips distributed along the length, and a plurality of vertical convex strips are arranged between the two transverse convex strips.

9. The curved back panel forming mold of claim 1, wherein: The lower mould is further provided with a side stopper, and the side stopper is used for limiting the outer side end of the flat plate.

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