CN200976722Y - An Improved Metal Frame for LCD Screen Panel Suitable for Laser Welding - Google Patents

Abstract

The utility model provides a modified is fit for laser welded LCD screen panel frame, it includes the U-shaped work piece of two unequal side lengths, the U-shaped work piece butt joint department of these two unequal side lengths passes through laser welding admittedly, in order to form the planar structure framework of a mouthful font, but supply punching press one-tenth frame structure with angle, and then reach more fast than the prior art, accurate laser welding process work piece locate mode, reduce artificial location careless, the welding defect that further improvement is known the technique and can't be avoided on laser welding, reach the effect that the quality promoted.

Description

An Improved Metal Frame for LCD Screen Panel Suitable for Laser Welding

technical field

The utility model relates to an improved liquid crystal screen panel frame suitable for laser welding, which can quickly and accurately locate workpieces in the laser welding process, and can reduce artificial positioning errors, and can further improve the prior art The unavoidable welding defects in laser welding can achieve the effect of quality improvement.

Background technique

Please refer to FIG. 1 , the general liquid crystal screen panel structure is mainly provided with a metal frame 11 , a glass panel 12 and a host module 13 , and the metal frame 11 is used to combine and lock the glass panel 12 and the host module 13 , a variety of techniques have been revealed for its production;

As shown in Fig. 2 again, in this prior art, the center and part of the periphery of the entire sheet metal plate 21 are punched out into a frame 22 with a square-shaped plane structure, which is then formed into a metal frame 11 by stamping;

However, in the conventional technology mentioned above, during the punching process of the metal plate 21, the removed metal scrap 24, especially the area of the central part is more than twice the actual use, so the cost is quite high;

Please refer to Fig. 3 again, and someone further improved it by punching the entire metal plate 21 into an L-shaped frame part 31, and then combined two sets of L-shaped frame parts 31 into a flat-shaped frame 22 and fixed it by welding. And forming the metal frame 11 by stamping;

Although it can greatly save the cost of materials by punching the arrangement of L-shaped frame parts 31 compared with the prior art, when laser welding, as shown in Figure 4, in order to achieve the tight joint of L-shaped frame parts 31 before welding The purpose is to apply force around the L-shaped frame part 31 respectively. If the force is applied unevenly in any direction, the phenomenon of misalignment 51 as shown in Figure 5 may occur, and it will become a defective product during subsequent welding;

Conventional technology laser welding often forms welding defects due to insufficient laser instantaneous energy at the beginning and end of welding. In order to avoid such defects in the normal joint area, the start and end points of laser welding are often designed at normal As shown in Figure 6, if the welding path 61 is implemented, although a complete laser weld bead 62 can be formed in the normal joint area, it cannot avoid the formation of incomplete and depressed welds outside the normal joint area. Corrosion 63, the welding corrosion 63 not only makes the appearance of the frame product poor, but also causes abnormal wear of the stamping die in the subsequent stamping process; in addition, the surface of most LCD screen panel frame materials is galvanized to prevent corrosion. The welding corrosion galvanized layer has been damaged, thus losing the anti-corrosion function;

Therefore, how to get rid of the above-mentioned defects, and provide a liquid crystal screen panel frame that is suitable for laser welding can be improved, and at the same time, it can improve the fast and accurate laser welding process workpiece positioning method, and can reduce man-made Inadequate positioning, further improving the unavoidable welding defects of conventional technology in laser welding, and achieving the effect of quality improvement are the technical problems that the utility model intends to solve.

Contents of the invention

The main purpose of this utility model is to provide a liquid crystal screen panel frame that can effectively save material costs, is suitable for laser welding, simple and fast positioning, and avoids welding defects. It can further improve the unavoidable problems of conventional laser welding. Welding defects to achieve the effect of quality improvement.

The utility model is realized through the following technical scheme. An improved liquid crystal screen panel frame suitable for laser welding provided by the utility model includes two U-shaped workpieces with unequal sides. The butt joints of the long U-shaped workpieces are welded by laser to form a square-shaped frame structure, which can be stamped into an angled frame structure, thereby achieving a faster and more accurate laser welding process than conventional technologies. The workpiece positioning method reduces artificial positioning errors, and further improves the unavoidable welding defects of conventional laser welding technology to achieve the effect of quality improvement.

In order to facilitate and concise understanding of other features and advantages of the present invention and the effect achieved by it can be more apparent, the present invention will be described in detail with accompanying drawings.

Description of drawings

FIG. 1 is an exploded schematic diagram of a conventional liquid crystal screen panel structure;

Fig. 2 is a schematic diagram of making a metal frame of a liquid crystal screen panel in the prior art;

Fig. 3 is a schematic diagram of making a metal frame of a liquid crystal screen panel improved by conventional technology;

Fig. 4 is a schematic diagram of assembly of L-shaped frame components in the prior art;

Fig. 5 is a schematic diagram of assembly dislocation before welding of L-shaped frame parts in the prior art;

Fig. 6 is a schematic diagram of laser welding defects of L-shaped frame parts in the prior art;

Fig. 7 is the schematic diagram of making the metal frame of the liquid crystal screen panel of the present invention;

FIG. 8 is a schematic diagram of the utility model implemented in a laser welding jig table.

Explanation of reference signs: 11-metal frame; 12-glass panel; 13-host module; 21-metal plate; 22-shaped plane structure frame; 24-metal waste; 31-L-shaped frame parts; ;61-welding path; 62-laser welding bead; 63-welding erosion; 71-U-shaped workpiece with unequal side length; 82-locating pin; 83-laser welding fixture table;

91-start point of welding; 92-end point of welding.

Detailed ways

Please refer to Fig. 7, an improved liquid crystal screen panel frame suitable for laser welding provided by the utility model, which includes:

Two U-shaped workpieces 71 with unequal side lengths, the two U-shaped workpieces 71 with unequal side lengths are joined to each other to form a frame 22 with a flat frame structure 22, which is fixed by laser welding, and is used for punching to be suitable for LCD TV screens. Panel assembly and angled frame structure, in which the U-shaped workpiece can be stamped from a whole sheet metal 21, or cut into shape from a whole sheet metal 21, and the laser source is carbon dioxide laser or Nd-YAG (neodymium yttrium aluminum Garnet) laser or fiber (optical fiber) laser or diode laser;

Please refer to Fig. 8 again, it is the situation that the utility model is implemented on the laser welding jig table, and the positioning pins 82 set at the four corners of the laser welding jig table 83 of the utility model can be used for the Two U-shaped workpieces 71 with unequal side lengths are quickly positioned; when laser welding, the laser welding start point 91 and welding end point 92 are all set at positions other than the starting point and end point of the welding line, so after welding is completed, A complete laser welding bead 62 can be formed in the normal joint area, and the U-shaped workpiece 71 with unequal sides length can be placed in the laser welding due to the U-shaped structural feature of the U-shaped workpiece 71 with unequal sides The precise positioning function can be achieved on the jig table 83 , thereby achieving the effect of avoiding the joint dislocation 51 .

In order to make the utility model show its advancement and practicality more, it is as follows to make a comparative analysis with the conventional technology:

Common techniques:

1. Laser welding often forms welding defects at the beginning and end of welding due to insufficient instantaneous laser energy.

2. If the L-shaped frame workpiece is joined by laser welding, it is easy to form an incomplete weld bead in a local area other than the normal joint area.

3. The mold is worn, the appearance is not good, and it cannot prevent corrosion.

4. A lot of waste materials are produced, and the cost increases.

The utility model advantage:

1. Fast and precise positioning, no misplaced welding.

2. Cost saving and less waste.

3. It can avoid the welding defects caused by the lack of instantaneous laser energy at the beginning and end of welding.

4. With the laser welding fixture table, it can be mass-produced.

To sum up, the utility model has indeed achieved the desired effect by improving the structure of the prior art, and it is not easy for those who are familiar with the art to think about it. However, the above description is only an embodiment of the present utility model, and is not intended to limit the embodiment of the present utility model; those who are familiar with this technology can make other equivalents according to the characteristic category of the present utility model. Changes or modifications, such as size, material selection, or shape changes, etc., should be covered within the scope of the following patent applications for this utility model.

Claims (7)

1. An improved liquid crystal screen panel metal frame suitable for laser welding, characterized in that it includes: Two pieces of U-shaped workpieces with unequal side lengths. The joints of the two U-shaped workpieces with unequal side lengths are welded by laser to form a flat structure frame in the shape of a word for stamping into an angled frame structure. . 2. The improved metal frame of liquid crystal screen panel suitable for laser welding as claimed in claim 1, characterized in that the U-shaped workpiece with unequal side length is formed by stamping a whole piece of metal plate with unequal side length U-shaped workpiece. 3. The improved metal frame of liquid crystal screen panel suitable for laser welding as claimed in claim 1, characterized in that the U-shaped workpiece with unequal side length is a U-shaped piece with unequal side length cut from a whole piece of metal plate artifact. 4. The improved liquid crystal screen panel metal frame suitable for laser welding according to claim 1, characterized in that the laser source used for laser welding is carbon dioxide laser. 5. The improved metal frame of liquid crystal screen panel suitable for laser welding according to claim 1, characterized in that the laser source used for laser welding is Nd-YAG laser. 6. The improved metal frame of liquid crystal screen panel suitable for laser welding according to claim 1, characterized in that the laser source used for laser welding is fiber laser. 7. The improved metal frame of liquid crystal screen panel suitable for laser welding according to claim 1, characterized in that the laser source used for laser welding is a diode laser.

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