KR20110026243A - Oil injection apparatus for press process of chassis - Google Patents

Abstract

PURPOSE: An oil injection apparatus for a press process of a chassis is provided to inject a proper amount of oil during a chassis press process. CONSTITUTION: An oil injection apparatus for a press process of a chassis comprises an oil injecting pipe(31) with a plurality of nozzles(32) on a route around a press processed chassis in a press metal molding for manufacturing chassis. Therefore, the oil provided from an external oil supply mean is directly injected to the chassis press part through the nozzles and the oil injecting pipe inside the press metal molding.

Description

Oil injection apparatus for press process of chassis {Oil injection apparatus for press process of chassis}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil injection device, and more particularly, to an oil injection device for press processing of a chassis that supplies oil to an accurate position during press processing of a chassis material in manufacturing a chassis of a display device such as a liquid crystal display device.

In general, with the recent development of information processing devices, the demand for display devices such as an image display device or an image display device which serves as an interface between a user and the information processing device 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.

Among the display devices described above, a liquid crystal display device having a competitive performance in recent years will be described.

The liquid crystal display is a device for displaying information by using the electrical and optical properties of the liquid crystal material injected into the liquid crystal display panel. Recently, portable video cameras, digital cameras, and automobiles are used as monitors and image display devices of televisions and computers. Applications such as navigation devices, various informatization 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 stored in a case for protection and fixing from an external impact, and the components of the backlight assembly are sequentially received at the bottom of the case, and the liquid crystal display panel assembly is received thereon.

In the liquid crystal display, a chassis is coupled to the case to prevent the display panel assembly simply mounted on the case from being separated outward.

The chassis is installed to support the outside of the display panel assembly. The chassis is divided into a top chassis and a bottom chassis according to the front and rear positions of the display panel assembly. The chassis is made of an aluminum alloy, stainless steel, SECC, SGLCC, or the like.

These chassis are manufactured through a press process using progressive or transfer methods, and smaller ones are made in one piece, and larger ones are divided into two or four parts in order to reduce the amount of discarded steel sheets. Manufactured in the form of assembly and then the corner part is connected by welding.

For example, the chassis is manufactured in a predetermined shape through a conventional press 6 process, and then a tapping process, which is a tapping process for mounting peripheral parts, is completed, followed by a washing process and a drying process, thereby completing the final product.

The press 6 process in the above manufacturing process is a process of making a product shape of the chassis through stepwise press processing using six molds. Press process sequentially to make product shape.

Examples of the press 6 process include a one-step process in which shearing and forming molding are performed, a two-step process in which notching, embossing and compacting molding are performed, a three-step process in which notching, piercing and chamfer molding is performed, indenting, burring, and engraving. The process may include a four-step process in which chamfer molding is performed, a five-step process in which burring and chamfer molding are performed, and a six-step process in which box-bending is performed.

Here, box-bending is a process of bending the edge of the chassis into a 'b' cross-sectional shape, and the mold is subjected to the process of bending the edge of the chassis at an approximately 90 ° angle.

In the press-molding process as described above, in order to minimize damage such as heat generation and scratches at the part where the sheet material is bent or cut through the mold, proper lubrication and cooling of the processing part are required.For this, oil (cutting oil, lubricant) It is common to supply) to improve the processability.

In general, during the process, oil is manually sprayed on the processing site or the entire chassis or supplied using an oil lubrication device, where the oil lubrication device may be composed of an oil tank, an oil pump, an oil supply cylinder, an oil distributor, and the like.

In this way, when the oil is lubricated in the machining area or the entire chassis, the life of the apparatus such as the mold can be extended, and above all, the processability can be improved to manufacture high quality products.

In order to manufacture a high quality product during the manufacturing process of the chassis, such as the bottom chassis as described above, the use of oil is essential, if the oil is supplied by hand or through the oil lubrication device, there are the following problems.

If oil is supplied by hand, the working efficiency is significantly reduced and the amount of oil cannot be controlled so that an excessive amount of oil is supplied.

In this case, excessive amount of oil contaminates the workplace environment, such as contaminating the floor of the site, and excessive amount of waste not only wastes oil by using the oil, but also fails to supply the fixed amount in the right place, and contaminates the workplace with scratches. There is a problem of lowering the product quality, such as a large number of surface damage of the site.

The scratch is formed by scraping the processing surface of the metal mold making the shape at the processed portion of the product while contacting the surface of the product processing portion, and supplying oil to the processing portion can prevent the occurrence of scratches.

In the case of using the oil lubrication device, as in the case of manual supply, there are many problems such as excessive oil supply, environmental pollution in the workplace, oil waste, and deterioration of product quality.

If the product is supplied with excessive oil, there is a disadvantage in that the overall process layout is increased and the number of processes is increased, for example, a washing process and a drying process must be provided to remove the oil on the chassis during the press. There are disadvantages in terms of factory layout and inefficiencies in productivity.

Accordingly, the present invention has been invented to solve the above problems, and in the manufacture of a chassis of a display device such as a liquid crystal display, a chassis press capable of supplying an appropriate amount of oil to an accurate position during a press process of the chassis material. The object is to provide an oil injection device for processing.

In order to achieve the above object, the present invention, the oil injection pipe having a nozzle is installed on the path along the periphery of the processing area of the chassis that is press-processed inside the press mold for manufacturing the chassis to form the shape for each part of the chassis. To provide an oil injection device for the press working of the chassis characterized in that the oil supplied from the external oil supply means is configured to be directly injected into the machining portion of the chassis through the oil injection pipe and the nozzle inside the press die. .

Here, the oil injection pipe may be installed on a path along the periphery of the chassis when the oil injection pipe is installed in the press mold of the box-bending process.

In addition, the nozzle may be provided by forming a hole at a predetermined interval in the oil injection pipe.

In addition, the oil injection pipe may be installed on the upper mold or the lower mold, or both the upper mold and the lower mold, wherein the mold is inserted into the groove or the step portion formed in the recessed portion of the upper mold or the lower mold, It may be installed to be inserted into the groove portion or step portion of the recessed structure formed on the surface of the.

In addition, the oil injection pipe may be connected to the oil mist supply unit to spray the oil of the mist form.

Accordingly, according to the oil injection device of the present invention, by supplying oil to the correct position of the material to be processed in the press die, it is possible to solve the conventional problem of supplying an excessive amount of oil to contaminate the surrounding environment, By supplying the right amount of oil to the location, it is possible to effectively prevent damage to the surface of the product such as scratches.

In addition, the amount of oil used can be reduced, and the productivity of the product can be improved. In addition, when oil mist is used, the oil mist particles are small compared to the conventional liquid oil (cutting oil), and natural evaporation treatment is possible. Can be deleted. In addition, it has the advantage of efficiently designing the entire factory layout, and also has the advantage of improving the overall productivity of the chassis.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil injection device, and provides an oil injection device capable of supplying an appropriate amount of oil at an accurate position during a press process of a chassis material in manufacturing a chassis of a display device such as a liquid crystal display device. .

Particularly, in the present invention, an oil injection pipe extending along a path around a machining portion of a chassis material is installed in a press mold, and the oil injection pipe is provided with a nozzle for spraying oil supplied from an external oil supply means. Thus, the oil supplied to the machining portion of the chassis in the mold through the oil injection pipe is configured to be injected directly into the machining portion through the nozzle.

The oil injection device of the present invention supplies oil to the exact position of the material to be processed in the press die, and can solve the conventional problem of supplying an excessive amount of oil to contaminate the surrounding environment, and an appropriate amount of oil at the correct position. It can effectively prevent damage to the surface of the product, such as scratches (which reduces the amount of oil used).

The oil injection device of the present invention can be applied to a mold used in a press process for manufacturing a chassis, for example, a bottom chassis of a liquid crystal display, and is a box-bending process in the press 6 process. This can be usefully applied to the mold of the six-step process is made.

Here, the box-bending is a process of bending the edge of the chassis into a 'b' cross-sectional shape, and the upper and lower molds are closed during press processing, thereby bending the edge of the chassis at an approximately 90 ° angle.

Therefore, in the box-bending press process, the part press-processed by a metal mold | die becomes an edge part of a chassis. Therefore, in order to construct the oil injection device of the box-bending die (mold of the six-step process), an oil injection pipe is provided to supply oil to the edge of the chassis intermediate product mounted on the die in order to prevent damage to the surface of machining parts such as scratches. It must be installed in the mold.

To this end, the oil injection pipe is placed long along the path around the edge of the product mounted for processing so that the oil can be accurately injected into the edge of the workpiece.

1 is a view showing an oil injection device according to the present invention, showing a state in which an oil injection pipe is installed in a mold. A plan view showing the lower mold 10 in the mold 1 of the box-bending process, showing a state in which the product to be processed in the lower mold 10 is not mounted, or a portion where the box-bending is performed in the lower mold, that is, the lower mold 10. The oil injection pipe 31 is tightened to follow the path around the edge, which is the press-processed portion of the product when the product is mounted on the product. The lower oil injection pipe 31 may be installed to follow a peripheral path at a predetermined interval from each position where the three sides are placed as shown so as to spray oil on three edges of the product.

2 is a bottom view illustrating the upper die 20 in the mold 1 of the box-bending process, and the upper die 20 includes the remaining edges of the product. The oil injection pipe 31 may be installed to follow a peripheral path at a predetermined interval from a position at which the edge portion is placed so as to spray oil on the sides.

FIG. 3 is a perspective view illustrating an installation state of the infusion apparatus according to the present invention, and is an installation state diagram of an oil injection pipe installed in a lower mold.

As shown in Figures 1 to 3, the oil injection pipe 31 may be installed in the lower mold 10 and the upper mold 20, wherein the oil injection pipe 31 in each mold of the lower mold and the upper mold is It is installed to extend long along the path around the machining part. The oil injection pipe 31 may be installed on both the lower mold 10 and the upper mold 20 as shown in FIGS. 1 and 2 or on either of the lower mold 10 and the upper mold 20.

When the oil injection pipe 31 is installed in the mold 1, the oil injection pipe 31 may be installed on the upper surface of the lower mold 10 and the lower surface of the upper mold 20, and the oil injection pipe 31 may be installed on the opposite mold when the mold is closed. Installed so as not to contact.

To this end, the oil injection pipe 31 is inserted into the groove part or the stepped part 11 formed in the structure recessed from the surface of the mold, or is installed, or the surface of the mold of the opposite side so as not to collide with the oil injection pipe 31. The groove portion or step portion of the recessed structure into which the oil injection pipe can be inserted is formed.

For example, when the oil injection pipe 31 is installed in the lower die 10, the groove portion or step portion of the recessed structure in which the lower oil injection pipe can be inserted into the corresponding surface and the corresponding position of the upper die 20 is the oil injection pipe. It is formed along the path.

The oil injection pipe 31 is installed along a portion of the mold in which the press working is performed as shown in FIG. 3, and a bracket or a clamp 12 may be used to fix the oil injection pipe. Reference numeral 41 denotes an oil supply tube (hose or pipe) connected from an external oil supply means, that is, an oil lubrication device or oil mist supply unit described later, and reference numeral 13 denotes an oil supply tube 41 and an oil injection pipe in a mold ( 31 shows fitting parts for connecting.

On the other hand, the oil injection pipe 31 is provided with a plurality of nozzles 32 at a predetermined interval or at a predetermined interval, the direction of the nozzle, that is, the direction in which the oil is injected from the nozzle is to be the direction in which the processing part of the product is located. do.

The nozzle 32 may be formed by processing holes of a predetermined interval in the oil injection pipe 31, for example, the nozzle diameter, that is, the diameter of the hole is 1.5mm, the interval between the holes in the oil injection pipe is 35mm It is possible to.

In addition, the oil injection pipe 31 is connected to the oil supply tube (hose or pipe) 41 connected from the external oil supply device via the fitting part 13, whereby the oil supplied from the oil supply device is oil in the mold Through the injection pipe it can be injected into the processing area of the product.

Here, the oil lubrication device may be a conventional device composed of an oil tank, an oil pump, a lubrication cylinder, an oil distributor, and the like, and may be configured to supply an oil mist instead of an oil injection pipe.

In the prior art, when using an oil mist, the oil mist sprayer spraying the oil mist by hand was used. In the present invention, the oil mist sprayer can be sprayed with an appropriate amount of oil at a more accurate position than the oil mist sprayer. do.

In particular, it is possible to increase the work efficiency compared to the manual spraying, to prevent the waste of oil, and to improve the product quality by supplying the right amount of oil in the correct position. In addition, environmental pollution of the workplace can be prevented.

In addition, when spraying oil mist is used, it is possible to naturally evaporate because the particles of oil mist are smaller than the conventional liquid oil (cutting oil). The drying process can be eliminated. In addition, it has the advantage of efficiently designing the entire factory layout, and also has the advantage of improving the overall productivity of the chassis.

In order to supply the oil mist, the oil mist supply unit must be connected to the oil injection pipe of the mold by means of fittings. The oil mist supply unit is, for example, disclosed in Patent Application No. 2008-65937 filed by the present applicant. What is disclosed can be applied.

In the above patent, the oil mist supply unit is applied to the tapping machine of the bottom chassis manufacturing apparatus, and when it is applied to the press mold, the oil mist supplied by the oil mist supply unit is finally provided to the oil injection pipe 31 installed in the mold 1. Can be supplied and sprayed.

The oil mist supply unit is connected to the main air inlet line, the main air inlet line side and the booster / pressure regulator for boosting the air, and connected to the discharge side of the booster / pressure regulator are stored inside by using the air pressure It may include an oil mist discharge line for discharging an oil mist, and an oil mist discharge line connected between the oil mist discharge side and the distributor side to send an oil mist to each oil injection pipe side through the distributor.

Since the oil is supplied from the oil injection pipe 31 before the press working of the product starts, the moment the mold is closed, the oil injection pipe installed in the upper mold 20 is immediately before the press of the product. The oil injection pipe installed in the control unit controls the oil lubrication device or oil mist supply unit so that the oil is sprayed after the product is mounted and set in the mold before starting processing.

In order to precisely control the timing at which oil is supplied from the oil injection pipe 31, a sensor may be installed in the mold. In this case, the upper die is lowered to detect the closing of the mold through the sensor so that the oil can be automatically supplied immediately before the product press.

That is, when the upper mold 20 is lowered to meet the lower mold 10 and the mold 1 is closed, the upper mold 20 contacts and presses the sensor to output an electrical signal to the lower mold 10 or the upper mold. The sensor is connected to the controller such that the controller receives an electrical signal output from the sensor.

This allows the controller to detect when the mold is closed by the sensor and to determine when the oil should be injected, so that the oil or oil mist is supplied from the oil lubrication device or the oil mist supply unit to the oil injection pipe. The oil mist can be sprayed onto the machined part through the oil injection pipe.

In FIG. 1 and FIG. 3, reference numeral 51 denotes a counter contact sensor for countering the number of times of punching, that is, the upper die 20 descends, and when the upper die is contacted, an electrical signal is output to the controller. The controller calculates the number of strokes from the electrical signal of the contact sensor for the counter.

4A to 4C are diagrams illustrating a state in which oil is injected during press working in a mold having an oil injection device according to the present invention, in which oil is product 100 from an oil injection pipe installed in a lower mold 10. It shows the state of being sprayed on the machining part 101.

When the upper mold 20 is lowered as shown in FIG. 4B while the mold of FIG. 4A is opened, and the upper mold touches the contact sensor (reference numeral 51 in FIG. 3), the oil from the nozzle 32 of the oil injection pipe 31 is increased. Will be injected.

When the oil is sprayed on the edge portion 101, which is the processing portion of the product 100, immediately before the press, and when the upper die 20 is completely lowered as shown in FIG. 4C while the oil is sprayed, the edge portion 101 is The press working (box-bending processing) bent at an angle of 90 ° is completed.

In this way, according to the oil injection device of the present invention, it is possible to supply the appropriate amount of oil to the processing position of the product to be press-processed, so that it occurs in the box bending portion of the product, that is, the edge portion that is press-bending processing It is possible to effectively prevent possible scratches and cracks.

In addition, according to the oil injection device of the present invention, by accurately injecting the oil to the press-processed portion of the product through the oil injection pipe disposed inside the mold, the conventional manual oil supply method (oil mist spraying through the oil sprayer) or Compared to simply spraying the oil properly with the oil lubrication system, it is possible to prevent excessive oil use and to supply the optimum amount of oil in place to solve the environmental pollution problem without falling into the oil in the surrounding workplace. It becomes possible.

5 and 6 are photographs comparing the quality of a processed product by applying the oil injection system according to the present invention and the conventional oil supply method, as shown in FIG. 5 when the conventional oil supply method is applied. It can be seen that significant scratches occur. On the other hand, when applying the oil injection device of the present invention it can be seen that the scratch does not occur as shown in FIG.

1 is a view showing an oil injection device according to the present invention, a plan view showing a state in which the oil injection pipe is installed in the lower mold,

2 is a view showing an oil injection device according to the present invention, a bottom view showing a state in which the oil injection pie is installed in the upper mold,

Figure 3 is a perspective view illustrating an installation state of the injection device according to the invention,

4a to 4c is a view showing a state in which the oil is injected during the press working in the mold in which the oil injection device according to the present invention,

5 and 6 are photographs showing a comparison of the quality of the processed product by applying the oil injection system according to the present invention and the conventional oil supply method.

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

1: mold 10: lower mold

20: upper type 31: oil injection pipe

32: nozzle 100: product (chassis)

101: edge portion

Claims (6)

Oil injection with a nozzle 32 on a path along the periphery of the processing area 101 of the chassis 100 which is press-processed inside the chassis manufacturing press die 1 for forming a shape for each part of the chassis 100. A pipe 31 is installed so that the oil supplied from the external oil supply means is supplied to the machining portion 101 of the chassis 100 through the oil injection pipe 31 and the nozzle 32 inside the press die 1. Oil injection device for press working of the chassis, characterized in that configured to be injected directly. The method according to claim 1, The oil injection pipe 31 is installed in the press mold of the box-bending process, the oil injection device for the press working of the chassis, characterized in that installed on the path along the periphery of the edge portion 101 of the chassis 100. . The method according to claim 1 or 2, The nozzle 32 is an oil injection device, characterized in that provided by forming holes at a predetermined interval in the oil injection pipe (31). The method according to claim 1 or 2, The oil injection pipe 31 is installed on the upper mold (20) or lower mold (10) or oil injection device for the press working of the chassis, characterized in that installed in both the upper mold and the lower mold. The method according to claim 4, The oil injection pipe 31 is inserted into a groove or step portion 11 formed in a structure recessed in the upper mold 20 or the lower mold 10, or indented formed on the surface of the opposite mold in the mold to be installed. Oil injection device for the press working of the chassis, characterized in that is installed to be inserted into the groove or step portion of the structure. The method according to claim 1 or 2, The oil injection pipe (31) is an oil injection device for the press working of the chassis, characterized in that connected to the oil mist supply unit as the oil supply means to inject a mist of oil.

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