Method for tap-processing of ACM panel

Abstract

To provide a method for tap-processing of an ACM panel.SOLUTION: There is provided a tap-processing method for an ACM panel in which a tap for screw fastening is processed in an ACM panel made up of an inner skin and an outer skin, both made of a metal material, and a core layer made of a resin material interposed between both skins, the method comprising: an inner burring step of burring the inner skin of the ACM panel so that an inner burr formed on the inner skin extends toward the outer skin while pressing against the core layer; an outer burring step of burring the outer skin of the ACM panel so that an outer burr formed on the outer skin extends toward the inner skin while pressing against the core layer and so that the inner burr and the outer burr are connected; and a tapping step of forming a tap continuous with the connected inner and outer burrs.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a tapping method for an ACM panel used to attach a system board to a back cover of the ACM panel material of a display device. [Background technology]

[0002] Organic light emitting diodes (OLED) are composed of a hole injection electrode, an organic light emitting layer, and an electron injection electrode. Light is emitted by the energy generated when excitons, which are generated by the combination of electrons and holes in the organic light emitting layer, fall from an excited state to a ground state.

[0003] Due to this principle, OLEDs have self-luminous properties and, unlike LCDs, do not require a separate light source, which allows for reduced thickness and weight.

[0004] OLEDs are also considered to be the next generation display devices for portable electronic devices because they offer high quality characteristics such as low power consumption, high brightness, and fast response speed.

[0005] Generally, an OLED includes an OLED panel having an organic light-emitting layer therein, a back cover coupled to the OLED panel to support the OLED panel, and a system board mounted behind the back cover.

[0006] Meanwhile, when an OLED is in operation, high-temperature operating heat generated from the system board behind the back cover is transferred to the OLED panel, degrading the organic light-emitting layer of the OLED panel. The degraded organic light-emitting layer is denatured and decomposed, resulting in uneven brightness between pixels, which leads to degradation of image quality such as image retention and a shortened lifespan.

[0007] Therefore, the back cover needs to be made of a material with high rigidity and thermal conductivity to stably support the OLED panel and facilitate the dissipation of heat during operation.To meet these requirements, aluminum composite panels (ACM panels, Aluminum Composite Material) are now being used as the back cover material.

[0008] ACM panels consist of an inner skin and outer skin made of metal, and a core layer of resin material between the two skins. They have considerable structural strength and heat dissipation performance compared to their thickness, making them suitable as a back cover material.

[0009] Meanwhile, as shown in FIG. 1, the system board 5 is mounted on the forming portion of the back cover 8 and fastened to the back cover 8 using a screw fastening method, but because the ACM panel that makes up the back cover 8 is quite thin, it was not possible to process taps deep enough to maintain the screw fastening strength.

[0010] In the past, to solve this problem, a reinforcing plate was attached to the screw fastening portion of the back cover 8, and a tap was formed to connect the back cover 8 and the reinforcing plate, and the screw was fastened by that, or a pem nut was provided on the back cover 8 and the screw was fastened by that.

[0011] However, with such prior art, there is a problem that the use of auxiliary means such as a reinforcing plate or pem nut increases the number of parts, resulting in higher manufacturing costs for the product. Summary of the Invention [Problem to be solved by the invention]

[0012] The present invention is intended to solve these problems, and its purpose is to provide a method for tapping an ACM panel that utilizes the characteristics of the ACM panel when attaching a system board to a back cover, thereby forming a tap that can maintain sufficient screw fastening strength without using any additional auxiliary means. [Means for solving the problem]

[0013] In order to achieve the above-mentioned object, the tapping method for ACM panels according to the present invention is a method for processing taps for screw fastening in an ACM panel consisting of an inner skin and outer skin made of a metal material, and a core layer made of a resin material interposed between the two skins, and includes an inner burring step in which the inner skin of the ACM panel is burred so that the inner burr formed on the inner skin extends toward the outer skin while compressing the core layer, an outer burring step in which the outer skin of the ACM panel is burred so that the outer burr formed on the outer skin extends toward the inner skin while compressing the core layer, and the inner and outer burrs are connected, and a tapping step in which a tap is formed that is continuous with the connected inner and outer burrs.

[0014] The burring work in the inner burring step and the outer burring step is performed by a Scrapping Burring Punch (SBP).

[0015] The method may further include a reference point setting step of setting a burring reference point prior to the outer burring step so that the inner burr formed in the inner burring step and the outer burr formed in the outer burring step can be concentrically aligned.

[0016] The reference point setting step is performed in such a manner that the outer skin is punched by the punching portion at the tip of the SBP in the inner burring step, thereby forming a punching hole that serves as the burring reference point.

[0017] In the outer burring step, burring is performed by SBP through the punched holes. [Effects of the Invention]

[0018] According to the present invention, when a system board is attached to a back cover of an ACM panel material using screws, no additional auxiliary means is used to increase the fastening strength of the screws. Instead, the stress of the ACM panel itself is increased by burring, thereby stably maintaining the fastening strength of the screws, which is advantageous in helping to improve the productivity of OLED display devices. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 10 is a diagram showing a configuration in which a system board is attached to a back cover. [Figure 2a] 4A to 4C are diagrams sequentially showing inner burring steps according to the present invention. [Figure 2b] 4A to 4C are diagrams sequentially showing inner burring steps according to the present invention. [Figure 3a] 1A to 1C are diagrams sequentially showing the outer burring step according to the present invention. [Figure 3b] 1A to 1C are diagrams sequentially showing the outer burring step according to the present invention. [Figure 4] FIG. 1 illustrates a tapping step according to the present invention. [Figure 5] 10A and 10B are diagrams showing taps formed in an ACM panel according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] Specific details for carrying out the present invention will be described in detail below with reference to FIGS. 2 to 5. FIG.

[0021] The tapping method for an ACM panel according to the present invention is for forming taps for screw fastening in an ACM panel 10 consisting of an inner skin 12, an outer skin 14, and a core layer 16 interposed between the two skins 12, 14. This method can also be applied when fastening hooks instead of screws.

[0022] Here, the inner skin 12 and outer skin 14 of the ACM panel 10 applied to the present invention are preferably made of a metal material (aluminum, etc.) that can form burrs by burring processing described below, and the core layer 16 is preferably made of a resin material that can form relative repulsive stress while being compressed by forming burrs 121, 141 on the inner skin 12 and outer skin 14.

[0023] Furthermore, when the ACM panel 10 applied to the present invention is used as a back cover for a display device, it is preferable that it be limited to one that has a thickness (0.25t or less) that is sufficient to provide sufficient heat dissipation while maintaining structural rigidity.

[0024] The tapping method for an ACM panel according to the present invention is carried out in the following steps:

[0025] 1) An inner burring step in which the inner skin 12 of the ACM panel 10 is burred so that the inner burr 121 formed on the inner skin 12 extends toward the outer skin 14 while pressing against the core layer 16 (see Figures 2a and 2b).

[0026] 2) An outer burring step in which the outer skin 14 of the ACM panel 10 is burred so that the outer burr 141 formed on the outer skin 14 extends toward the inner skin 12 while pressing against the core layer 16, and the inner burr 121 and the outer burr 141 are connected (see Figures 3a and 3b).

[0027] 3) A tapping step for forming a continuous tap in the connected inner burr 121 and outer burr 141 (see FIG. 4).

[0028] Here, the burring work in the inner burring step and the outer burring step is performed by an SBP (Scrapping Burring Punch) 20, which consists of a punching part 201 that forms the tip of the SBP 20 and a burring part 202 that has a shape whose diameter gradually becomes larger than that of the punching part 201.

[0029] This type of SBP20 is mainly used for thin objects such as panels and pipes, and while the object is punched by the punching section 201, the burring section 202 bends the punched peripheral area in the direction of entry, forming a burr.

[0030] In the tapping step, the inner surfaces of the inner burr 121 and the outer burr 141 are tapped using a tool such as a tap drill 30 to form taps.

[0031] Therefore, according to the present invention, as shown in Figure 5, the core layer 16 of the ACM panel 10 is compressed laterally by a combination of the inner burr 121 formed in the inner burring step and the outer burr 141 formed in the outer burring step, and the compressed core layer 16 applies relatively strong stress to the inner burr 121 and the outer burr 141.

[0032] This increases the fastening strength of the screws fastened to the inner burr 121 and the outer burr 141, and as a result, when attaching the system board 5 to the back cover 8, the system board 5 can be firmly maintained in place without the need for any additional auxiliary means.

[0033] In addition, the present invention may further include a reference point setting step of setting a burring reference point prior to the outer burring step so that the inner burr 121 formed in the inner burring step and the outer burr 141 formed in the outer burring step can be concentrically aligned.

[0034] The reference point setting step may be performed in such a manner that the outer skin 14 is punched by the punching portion 201 at the tip of the SBP 20 in the inner burring step, thereby forming a punching hole 14a that serves as the burring reference point (see FIG. 3a).

[0035] Therefore, when outer burring is performed through the punching holes 14a formed in the outer skin 14, the outer burr 141 is aligned concentrically with the inner burr 121 and connected to each other accurately, so that a separate operation for aligning the inner burr 121 and the outer burr 141 concentrically is not required. [Explanation of symbols]

[0036] 10 ACM panels 12 Inner Skin 121 Inner burr 14 Outer Skin 141 Outer burr 14a Punching Hole 16 Core Layer 20 SBP 201 Punching section 202 Burring Department

Claims

1. A tapping method for an ACM panel, which processes taps into an ACM panel consisting of an inner skin and an outer skin made of a metal material, and a core layer made of a resin material interposed between the two skins, comprising: an inner burring step of burring the inner skin of the ACM panel so that the inner burr formed on the inner skin extends toward the outer skin while pressing the core layer; an outer burring step in which the outer skin of the ACM panel is burred so that the outer burr formed on the outer skin extends toward the inner skin while pressing the core layer, and the inner burr and the outer burr are connected to each other; and a tapping step of forming a continuous tap in the connected inner and outer burrs. A tapping method for an ACM panel.

2. The burring work in the inner burring step and the outer burring step is performed by a scraping burring punch (SBP) that is composed of a punching part at the tip and a burring part whose diameter gradually increases from the punching part. The tapping method for an ACM panel according to claim 1.

3. A reference point setting step is included in which a burring reference point is set prior to the outer burring step so that the inner burr formed in the inner burring step and the outer burr formed in the outer burring step can be concentrically aligned. The tapping method for an ACM panel according to claim 2.

4. The reference point setting step is performed in such a manner that the outer skin is punched by the punching part at the tip of the SBP in the inner burring step, thereby forming a punching hole that serves as the burring reference point. The tapping method for an ACM panel according to claim 3.

5. In the outer burring step, burring processing is performed by SBP through the punched holes. The tapping method for an ACM panel according to claim 4.

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