KR20080065770A - Press method for separation type chassis top - Google Patents

Abstract

A method for manufacturing a separation type chassis top is provided to minimize a protrusion portion of a bonding surface between the components and to prevent transformation of the components. In a separation type chassis top manufacturing method including a process of manufacturing one complete chassis by bonding two or four separated components through several steps of press processes, a hole(11) is formed on a bonding surface of one separated component(10a) and a protrusion(12) is formed on a bonding surface of the other separation component(10b), and the separation components are bonded with each other by performing press compression in the state the hole is coupled with the protrusion.

Description

Press method for separation type chassis top}

1 is a schematic diagram showing an overall process sequence in the method of manufacturing a split chassis top according to an embodiment of the present invention.

Figure 2 is a schematic diagram showing a split part pressing process in the method of manufacturing a split chassis top according to an embodiment of the present invention

Figure 3 is a schematic diagram showing a caulking bonding process in the method of manufacturing a split chassis top according to an embodiment of the present invention

<Description of the symbols for the main parts of the drawings>

10a, 10b: Split part 11: Hole

12: protrusion 13: taper section

14: groove portion 15: step portion

16: disc material

The present invention relates to a method for manufacturing a split-type chassis top of a two-part type or a four-part type, and more particularly, by implementing a new type of part part press method for joining joint surfaces of part parts by caulking. The present invention relates to a method for manufacturing a split chassis top which can increase the price competitiveness according to the efficiency and improve the quality of the product.

In general, with the recent development of information processing apparatuses, the demand for display devices (image display apparatuses or image display apparatuses) serving as interfaces between users and information processing apparatuses is rapidly increasing.

In particular, the development of high-definition television (High Definition Television) is part of the development, and the improvement of this problem continues to study the importance of the display device.

Types of such display devices are known, such as color cathode ray tube (CRT), liquid crystal display (LCD), fluorescent display (VFD), plasma display device (PDP) and the like.

However, as a display element satisfactory in relation to the development of high-definition television, which has not been technically completed yet, such display devices have been developed while maintaining mutually complementary relations at different positions.

Among the display devices described above, the liquid crystal display device and the plasma display device, which have recently been improved in performance, will be described.

First, the liquid crystal display device displays information by using the electrical and optical properties of the liquid crystal material injected into the liquid crystal display panel. Recently, a portable video camera and a digital video display device are used as monitors and image display devices of televisions and computers. Applications such as cameras, car navigation devices, various information devices, and communication devices are gradually expanding.

The liquid crystal display device as described above requires a liquid crystal display panel assembly that receives an image signal from the information processing device and converts the signal into a liquid crystal control signal and then controls the amount of light transmitted through the liquid crystal to visually recognize the electrical image signal. Shall be.

The liquid crystal display panel assembly is again connected to a liquid crystal display panel for displaying an image using liquid crystal, a printed circuit board for applying an electrical signal to the liquid crystal display panel, and the liquid crystal display panel and the printed circuit board, It includes a flexible circuit board to reduce the planar area.

In addition, since the liquid crystal display uses liquid crystal, which is a light-receiving element that does not emit light by itself, in addition to the liquid crystal display panel assembly, a backlight assembly which is installed on the lower surface of the liquid crystal display panel assembly and provides light to the liquid crystal display panel assembly is required. Done.

The above components are housed in a case for protection and fixation from external impact, and the bottom of the case sequentially receives the components of the backlight assembly, and above the liquid crystal display panel assembly.

Next, the plasma display apparatus displays an image on a plasma display panel (PDP) using a plasma generated by gas discharge. The plasma display apparatus includes a gas filled between two electrodes installed in an enclosed space. After the discharge voltage is applied, the phosphor layer formed in a predetermined pattern is excited using ultraviolet rays generated due to the discharge voltage to obtain desired numbers, letters or images.

Such a plasma display device basically includes a PDP, a chassis base disposed substantially parallel to the PDP, a thermally conductive medium interposed between the PDP and the chassis base and closely attached to the PDP and the chassis base, and the panel of the chassis base attached thereto. And a driving circuit mounted on the side opposite to the surface and connected to the PDP to drive the PDP. A front case is coupled to the PDP side, and a back case is coupled to the driving circuit side.

The plasma display device has the most promising resolution and illuminance ratio in this field, and is not only fast in response, but also suitable for displaying a large area image, and is widely used in televisions, monitors, indoor and outdoor display panels, and the like. have.

On the other hand, the liquid crystal display and the plasma display device both chassis is coupled to the case (chassis) in order to prevent the display panel assembly, which is simply seated on the case is separated from the outside.

The chassis is installed to support the outside of the display panel assembly. The chassis is divided into a chassis top and a chassis bottom according to the front and rear positions of the display panel assembly, and is made of a metal material such as aluminum alloy, stainless steel (SUS), SECC, or SGLCC. .

Such a chassis is manufactured through a press process using a progressive method or a transfer method. A small size is manufactured in one piece, and a large size is manufactured in a two-part or four-part assembly type.

Here, in the case of the chassis manufactured in a two-part or four-part assembly type, the joint surfaces of the respective divided parts are overlapped with each other by a predetermined portion, and then manufactured by a method of forcibly pressing the joint surfaces of each other using a predetermined tool.

However, the conventional two- or four-part chassis manufacturing method applies a process of forcibly pressing the joint surfaces of the divided parts to overlap each other, so that the press pressure is designed according to the material or the optimum pressure for the material. There are some inefficiencies in the process, such as difficulty in setting the press pressure, and in the case of the final product, because the joint surface protrudes about 0.8 ~ 1mm, it is necessary to consider the interference with the peripheral parts or deform the joint surface by the press pressure. Since it is a method of joining by using, there is a disadvantage in terms of overall quality, such as a defect in which the appearance is not clean, such as deformation of parts due to excessive press pressure.

Accordingly, the present invention has been made in view of the above, by applying a caulking method when joining a two-part or four-part type split parts, it is possible to minimize the occurrence of protrusions and deformation of the joint surface under a constant press pressure It is an object of the present invention to provide a method of manufacturing a split chassis top that can improve the price competitiveness and product quality of the product, such as to efficiently configure the overall manufacturing process by enabling a batch press process.

In order to achieve the above object, the present invention provides a method for manufacturing a split chassis top including a process of manufacturing one completed chassis by joining two or four divided parts through various steps of a press process. Forming a hole in the joining surface of the divided parts of the at the same time forming a projection on the joining surface of the other divided parts, characterized in that it comprises a step of joining the divided parts by press-pressing in the state of coupling the hole and the projection.

In addition, the hole of the divided part is characterized in that to form a part of the depth section in the tapered section so that the press-pressed portion of the projection is caught while spreading to the tapered section.

Further, it is characterized in that any one of the overlapping portions between the joining surfaces of the divided parts is stepped so that the outer surface of the divided parts becomes the same plane after the joining.

In addition, it is characterized in that the groove is formed on the rear surface of the protrusion of the divided part to accommodate a part of the deformation of the protrusion due to press compression.

In addition, the divided parts are manufactured by two or four divided parts at the same time from the raw material of the strip form through each predetermined press process.

Hereinafter, a method of manufacturing a split chassis top according to an embodiment of the present invention with reference to the accompanying drawings in detail.

1 is a schematic diagram showing an overall process sequence in a method of manufacturing a split chassis top according to an embodiment of the present invention.

As shown in FIG. 1, the display apparatus, for example, a chassis top, is manufactured as a split part having a two-part or a four-part type through several steps of a pressing process, and then has a single integrated frame shape through a caulking bonding process. After being assembled into the chassis of the product, it is finally shipped in a packaged state through a cleaning process for removing powders, an appearance process for inspecting defects such as scratches and warpage, and a flat process.

Here, the caulking joining process is a process of pressing and joining the holes and the projections of the divided parts to each other, and it is preferable that the entire process from mounting to taking out can be automatically performed by the robot.

For example, after molding a set of divided parts simultaneously through the press-protrusion in the press process, four sets of divided parts are transferred to the automatic caulking area with a shuttle robot, and then the upper and lower parts of the divided parts are in the automatic caulking area. It is desirable to carry out caulking at the same time as the side loading and the right and left reversal, and to continuously carry out the product and convey the conveyor so that subsequent processes such as a cleaning process can proceed.

In addition, the chassis manufacturing method using the caulking bonding process can be applied to both the two-division form or four-divided form, in the present invention will be described taking the process of completing the divided part of the four-divided form into one chassis as an example.

Figure 2 is a schematic diagram showing a split part pressing process in a method of manufacturing a split chassis top according to an embodiment of the present invention.

As shown in Figure 2, the material is continuously supplied in the form of a strip in the coiler for supplying the material, the raw material 11 thus supplied is divided into four parts constituting one chassis through a multi-step press process Parts 10a and 10b.

As one set of divided parts constituting one chassis is manufactured at the same time, the material can be effectively used while minimizing the discarded parts of the chassis. Also, the simultaneous manufacture of one set allows connection with subsequent processes such as caulking bonding process. The test process can be carried out more efficiently.

The divided parts from the raw material are manufactured through a roughly 12 step process, and the equipment for the press process may be a known press equipment for manufacturing a split chassis top.

For example, one chassis is divided into pilot piercing process → bending / notching process → primary bending / notching / embossing process → secondary bending / notching / embossing process → Z-bending process → piercing process → children process → box Through the bending process, the idle process, the bezel opening process, the bezel opening chamfer process, and the cutting process, they can be manufactured in one set of four divisions.

Figure 3 is a schematic diagram showing a caulking bonding process in the method of manufacturing a split chassis top according to an embodiment of the present invention.

As shown in FIG. 3, the caulking joining process forms a plurality of holes 11 in the joint surface of one of the divided parts 10a and 10b of the two divided parts 10a and 10b joined together. After the projection 12 is formed on the joining surface of another corresponding split part 10b, the hole 11 and the projection 12 are coupled to each other, that is, the projection 12 is inserted into the hole 11. It is a process of pressing and bonding these in the inserted state.

Here, the press equipment for crimping the holes and the projections may be adopted without particular limitation as long as the press equipment is commonly used in the art.

In addition, the protrusion 12 is projected out of the hole by a predetermined length in the state inserted into the hole 11, it is preferable to be able to tightly bind the protruding portion at this time is pressed and spread in the hole at the same time.

In the case of caulking through holes and projections, the joining can be completed by simply pressing the projections at a constant press pressure. Therefore, the two overlapped panels are forced to be pressed and joined due to excessive press pressure. Deformation and the like can be eliminated, and after press-pressing, almost all of the projections are made in the state of being dug in the hole, thereby making it possible to reduce the degree of protruding as before.

In the case of the caulking joint provided by the present invention, the substantially protruding height is only about 0.1 to 0.2 mm.

In particular, the hole 11 of the divided part 10a has a tapered section 13 in which a part of a depth section, for example, the opposite depth section on the side from which the projection is inserted, extends outward. Since the projection part can be compressed in the form of being caught while spreading in the tapered section 13 at this time, it is possible to secure a solid binding state between the divided parts, and to minimize the protruding part.

Further, one of the overlapping portions between the joining surfaces of the divided parts 10a and 10b, for example, the joining surface of the divided parts 10a having the holes 11 is stepped, i.e., the holes 11 The outer surface of the divided parts 10a and 10b facing each other after joining is the same by allowing the joining surface of a part area to be included to be stepped through the stepped portion 15 as much as the part thickness and to enter the inside at the time of joining. To be flat.

In addition, the groove portion 14 is provided on the rear surface of the protrusion 12 formed on the divided part 10b, and the groove portion 14 at this time can accommodate a part of the deformation part of the protrusion due to press compression. Therefore, the occurrence of defects such as protruding or crushing of the surface of the joint can be excluded, and thus the smooth appearance of the joint can be maintained.

Such caulking joint is made in four cases of one chassis made of a four-dividing type, it is possible to manufacture one completed chassis when the caulking joining for four places.

As described above, the present invention implements a new type of split part press method for joining and assembling split parts using a caulking method, thereby minimizing protrusions and deformation of the joint surface, and collectively under a constant press pressure. It is possible to achieve a press process, and thus there is an advantage that can be efficiently configured the overall manufacturing process, and ultimately there is an effect that can improve the price competitiveness and product quality of the product.

Claims (5)

In the method of manufacturing a split chassis top comprising a step of manufacturing a completed chassis by joining two divided parts or four divided parts through several steps of the press process, Forming a hole in the joint surface of one divided part and simultaneously forming a protrusion in the joint surface of the other divided part, and joining the divided parts by press-pressing in a state where the hole and the protrusion are coupled to each other. Method of manufacturing a split chassis top. The method of claim 1, wherein the divided part has a hole having a depth section formed in a tapered section so that the press-pressed portion of the protrusion is spread over the tapered section. The method of manufacturing a split chassis according to claim 1 or 2, wherein any one of the overlapping portions between the joining surfaces of the divided parts is stepped so that the outer surface of the divided parts becomes the same plane after the joining. The method of manufacturing a split chassis according to claim 1 or 2, wherein a groove is formed on a rear surface of the protrusion of the divided part to accommodate a part of the deformation part of the protrusion by press compression. The method of claim 1 or 2, wherein the divided parts are made of two or four divided parts simultaneously from the raw material of strip form through each predetermined press process.

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