CN101407378A - Welding press table - Google Patents

Abstract

A welding and pressing machine table includes a light source, a focusing mirror, a carrying plate, a pressing fixture and a hot pressing head. The light source generates a light beam traveling along an optical axis. The carrying tray is used to carry objects with solder joints. The pressing fixture is provided with several openings, each opening includes an upper opening and a lower opening, the upper opening is close to the light source, and the lower opening is close to the carrier plate, the cross-sectional area of the upper opening is larger than that of the lower opening, forming each opening The side wall of the hole is an inclined plane, and the included angle between the inclined plane and the direction of the optical axis is greater than or equal to a default value, wherein the default value is the tangent value of dividing the radius of the focusing mirror by the focal length of the focusing mirror. The thermal head is used to apply force to the pressing jig to press the object after the light beam passes through the opening and irradiates the soldering point of the object to confirm that the soldering point has been placed in a preset position .

Description

Welding press machine

technical field

The invention relates to a welding and pressing machine, in particular to a welding and pressing machine which utilizes beams of light to locate the positions of welding points of objects.

Background technique

During the manufacturing process of Liquid Crystal Display (LCD), the personnel who operate the welding and pressing machine need to manually place the unwelded objects on the tray, and then control the thermal head to apply force to the pressing machine. Joint jig to weld and press the object. However, the size of the thermal head is limited by the size of the object to be pressed, the current processing technology, and the mechanical space, so it is impossible to make a larger thermal head. Therefore, the pressure welding process is limited by the size of the thermal head, so that each thermal head can only complete the welding of 2-3 objects at a time. Next, it is necessary to manually remove the pressed objects from the carrier tray, and then place the unpressed objects on the carrier tray, and repeat the operation again and again. However, such an operation mode needs to consider the time for manually moving the pressed and to-be-pressed items, which is obviously inefficient for a production line that emphasizes rapid mass production, resulting in a long time to complete the pressing of each piece.

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a laser welding press machine 10 in the prior art irradiating solder joints of an object to be pressed. At present, a laser welding (Laser Soldering) pressing machine 10 is used to set a light source 12 to emit a laser beam. After the laser beam is focused by the focusing lens 15 , it will be irradiated on the welding spot 22 of the object 20 placed on the carrier plate 14 . Afterwards, the optical sensor (not shown in the figure) of the welding press machine 10 , such as a charge coupling device (CCD), will detect the position of the welding spot 22 according to the laser beam. Since the laser light must be irradiated on the welding spot 22 to capture the image, and for effective pressing, the distance between the edge of the opening 18 of the pressing jig 16 and the welding spot 22 is very close. It can be seen from FIG. 1 that after the laser beam passes through the focusing lens 15, because the focal length F of the focusing lens 15 is limited, the laser beam cannot be completely irradiated on the solder joint 22, but part of the light is blocked by the edge 16a of the pressing fixture 16. , causing the laser beam to fail to pass to the solder joint 22, resulting in a captured image with low contrast that cannot be identified.

In addition, the carrier plate 14 of the laser welding press machine 10 can place 10-30 objects to be pressed 20 , so the pressing jig 16 with a corresponding number of openings 18 is often configured. Therefore, the pressing jig 16 also occupies a certain area. Once the thermal head exerts force on the pressing jig 16 , it is impossible to ensure that all the objects 20 are tightly pressed by the pressing jig 16 due to the factors that the height of the spring and the deformation are difficult to be regulated and consistent. Once some objects are not tightly pressed by the pressing jig 16, the solder cannot overflow to the upper flexible printed circuit board (FPC) after melting to form a void soldering.

Since the existing laser welding press machine 10 has the above-mentioned shortcomings, it is still necessary to improve this machine in the manufacturing industry in pursuit of production efficiency.

Contents of the invention

The main purpose of the present invention is to provide a welding and pressing machine table, the opening of the pressing jig includes an upper opening and a lower opening, the upper opening is close to the light source, the lower opening is close to the carrier plate, and the upper opening The cross-sectional area is larger than the cross-sectional area of the lower opening, so that the light beam emitted by the light source can completely pass through the opening, so that the captured image can achieve better contrast.

According to the above purpose of the present invention, the present invention provides a welding and pressing machine table, which includes a light source, a focusing lens, a carrier plate, a pressing jig, and a thermal pressing head. The light source is used to generate a light beam traveling along the optical axis. The focusing lens is arranged in the direction of the optical axis. Used to focus the beam. The carrying plate is used to carry objects, and the objects are provided with welding spots. The pressing fixture is provided with several openings, each opening includes an upper opening and a lower opening, the upper opening is close to the light source, the lower opening is close to the carrier plate, and the cross-sectional area of the upper opening is larger than the lower opening The cross-sectional area, the side wall forming each opening contains a slope, the angle between the slope and the optical axis direction is greater than or equal to the default value, wherein the default value is the tangent of the radius of the focusing mirror divided by the focal length of the focusing mirror value (tangent). The thermal head is used to apply force to the pressing jig after the light beam passes through the opening and irradiates the welding spot of the object to confirm that the welding spot has been placed in a preset position, so as to press the welding spot object.

According to a preferred embodiment of the present invention, the light source is used to generate a laser beam. The carrying tray carries several objects at the same time. The distance between the lower surface of the pressing fixture and the focusing mirror is smaller than the focal length of the focusing mirror. The lower opening of the hole tightly wraps the solder joint.

According to a preferred embodiment of the present invention, the welding and pressing machine platform of the present invention further includes a first buffer member, which is arranged between the pressing jig and the object, and is used for applying force to the pressing head on the pressing head. When closing the jig, make the first cushioning member evenly exert force on the object. Wherein the first buffer member includes a hole, the area of the hole is larger than the area of the solder joint, and is used to make the solder joint pass through the hole after the object is placed on the carrier.

According to a preferred embodiment of the present invention, the welding and pressing machine platform of the present invention further includes a second buffer member, which is arranged between the object and the carrier plate, and is used to exert force on the thermal head When the jig is pressed, the second cushioning member is evenly applied to the object.

According to a preferred embodiment of the present invention, the welding and pressing machine platform of the present invention further includes a moving stage, which is used to move the carrier plate so that the welding spot of the object moves under the opening of the pressing fixture.

In order to make the above content of the present invention more obvious and understandable, a preferred embodiment is specifically cited below, together with the accompanying drawings, and described in detail as follows:

Description of drawings

FIG. 1 is a schematic diagram of a prior art laser welding and pressing machine irradiating solder joints of an object to be pressed.

Fig. 2 is a schematic diagram of the welding spot of the object to be pressed irradiated by the welding and pressing machine of the present invention.

Detailed ways

The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention can be practiced. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "side", etc., are only referring to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the present invention.

Please refer to FIG. 2 . FIG. 2 is a schematic diagram of the welding and pressing machine 40 of the present invention irradiating the welding spot 62 of the object 60 to be pressed. The welding (Laser Soldering) pressing machine table 40 includes a light source 42 , a carrier plate 44 , a focusing lens 45 , a pressing fixture 46 , a moving stage 50 and a thermal head 56 . The carrying tray 44 is disposed on the moving platform 50 , and the carrying tray 44 can carry a plurality of objects 60 provided with solder joints 62 . In this embodiment, the pressing fixture 46 includes several openings 48, and each opening 48 corresponds to a focusing lens 45. For the sake of simplicity in the drawings, only the focusing lens 45 and the opening are shown in the following embodiments. Hole 48. The light source 42 is used to generate light beams traveling along the optical axis direction 422 . In a preferred embodiment, the light source 42 may be a laser light source for generating a laser beam. The laser beam focused by the focusing lens 45 disposed in the optical axis direction 422 passes through the opening 48 of the bonding jig 46 and strikes the solder spot 62 of the object 60 placed on the carrier plate 44 . Afterwards, the optical sensor (not shown in the figure) of the welding press machine 40 , such as a charge coupling device (CCD), detects the position of the welding spot 62 according to the laser beam. For example, if the solder joint 62 is completely placed under the opening 48, the light sensor will detect an area with a predetermined brightness. On the contrary, if the welding spot 62 has a slight deviation and is not completely placed under the opening 48, part of the laser beam will be shot on the carrier plate 44, so the area of the predetermined brightness detected by the light sensor is relatively small, This indicates that the solder joints were not placed in the exact intended location. In order to avoid affecting the lamination effect later, the moving stage 50 will slightly move the carrier plate 44 until the solder joint 62 is accurately placed at the preset position. When the positions of the welding points 62 are aligned, the thermal head 56 will exert force on the pressing jig 46 to press the object 60 .

It can be found from FIG. 2 that the side wall 462 of the pressing fixture 46 is an inclined plane. In other words, each opening 48 includes an upper opening 482 and a lower opening 484 . The upper opening 482 is close to the light source 42 , and the lower opening 484 is close to the carrier plate 44 , and the cross-sectional area of the upper opening 482 is larger than that of the lower opening 484 . In order to achieve a better pressing effect, the opening 482 under the opening 48 tightly wraps the solder joint 62 . In addition, the distance between the lower surface of the pressing fixture 46 and the focusing lens 45 is smaller than the focal length F of the focusing lens 45 .

Please note that the angle B between the inclined plane 462 and the optical axis direction 422 is greater than or equal to a default value, which corresponds to the tangent of the radius D of the focusing mirror 45 divided by the focal length F of the focusing mirror. That is to say, $\mathrm{the\; tan}B\&Greater\; Equal;\mathrm{the\; tan}A=\frac{\mathrm{D.}}{f}.$ Such a configuration can ensure that the laser beam can be completely projected into the opening 48 of the pressing fixture 46 after being focused by the focusing lens 45 without being blocked.

The welding and pressing machine table 40 further includes a first buffer member 52 . The first buffer member 52 is disposed between the pressing jig 46 and the object 60 . The first buffer member 52 includes a hole, the area of which is larger than that of the solder joint 62 , and is used for allowing the solder joint 62 on the object 60 to pass through the hole after the object 60 is placed on the carrier plate 44 . In order to allow the thermal head 56 to exert force on the pressing fixture 46, the object 60 can be more evenly stressed, so the function of the first buffer member 52 placed between the pressing fixture 46 and the object 60 is to let the pressure from the heat press The force of the head 56 is evenly applied to the object 60 .

In addition to the first buffer 52, the welding and pressing machine table 40 may further include a second buffer 54, the second buffer 54 is disposed between the object 60 and the carrier plate 44, and its purpose is similar to that of the first buffer 52, That is, when the thermal head 56 exerts force on the bonding jig 46 , the force from the thermal head 56 can be evenly applied to the object 60 through the second buffer member. In order to increase the production efficiency, several objects 60 are carried on the carrier plate 44, so the arrangement of the first buffer member 52 and the second buffer member 54 can solve the problem of the hot pressing head 56 exerting force on the pressing fixture 46 due to Due to the spring height and deformation, some objects 60 distributed on the carrier plate 44 cannot be tightly pressed by the pressing jig 46 due to the uneven distribution of some objects 60 .

The moving stage 50 of the welding and pressing machine 40 is used to automatically move the carrier plate 44 so that the welding spot 62 of the object 60 moves under the opening 48 of the pressing fixture 46 . In this way, after the pressing of the objects 60 is completed, the moving stage 50 can move the carrier plate 44 in the direction of the arrow C, so that the next batch of objects 60 will automatically move to the corresponding opening 48. In addition, the previous batch of pressed objects does not need to be taken out from the carrier plate 44 for welding, so the steps of manual handling can be saved.

Compared with the prior art, the welding and pressing machine platform of the present invention is provided with a moving platform that can automatically move the carrying plate. After the objects are pressed together, there is no need to take out the objects from the carrier plate and weld them again. Instead, it automatically moves to the bottom of the light source, so the steps of manpower moving the pressed objects can be saved. In addition, the opening of the pressing fixture is designed to be inclined (that is, the upper opening is large and the lower opening is small). In this way, it is ensured that the light can be effectively irradiated on the solder joint through the opening, and it is also ensured that the lower opening is tightly wrapped around the solder joint, so as to achieve a better pressing effect. Adding a first or second buffer with a certain thickness to the lower surface of the pressing jig or the upper surface of the bearing plate can overcome the situation that all springs cannot be effectively pressed together due to inconsistent spring height or inconsistent compression.

To sum up, the present invention clearly meets the requirements of an invention patent, and a patent application is filed in accordance with the law. However, the present invention has been disclosed above with a preferred embodiment, but it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes without departing from the spirit and scope of the present invention. and modification, so the scope of protection of the present invention shall prevail as defined by the appended claims. In addition, any embodiment or claims of the present invention need not achieve all the objects or advantages or features disclosed in the present invention. In addition, the abstract and the title are only used to assist in the search of patent documents, and are not used to limit the scope of rights of the present invention.

Claims (9)

1. A welding and pressing machine platform, which comprises: a light source for generating a light beam advancing along an optical axis; A focusing mirror, arranged in the direction of the optical axis, is used to gather the light beam; A carrying plate is used to carry an object, and the object is provided with a welding spot; it is characterized in that: the welding press machine includes: A pressing fixture, which is provided with several openings, each opening includes an upper opening and a lower opening, the upper opening is close to the light source, the lower opening is close to the carrier plate, and the cross-sectional area of the upper opening is Greater than the cross-sectional area of the lower opening, the side wall forming each opening includes a slope, and the angle between the slope and the optical axis direction is greater than or equal to a default value, wherein the default value is in line with the focusing lens the tangent of the radius divided by the focal length of the focusing mirror; and a thermal pressure head, used to apply force on the pressing jig after the light beam passes through the opening and irradiates the soldering point of the object to confirm that the soldering point has been placed in a preset position, to press the object. 2. The welding and pressing machine table according to claim 1, characterized in that: the welding and pressing machine table further comprises a first buffer member, which is arranged between the pressing fixture and the object, It is used to make the first cushioning member evenly exert force on the object when the thermal pressure head exerts force on the pressing fixture. 3. The welding and pressing machine according to claim 2, wherein the first buffer member includes a hole, and the area of the hole is larger than the area of the solder joint, and is used for placing the object Behind the carrier pad, make the solder joint go through the hole. 4. The welding and pressing machine table according to claim 1, characterized in that: the welding and pressing machine table further comprises a second buffer, and the second buffer is arranged on the object and the bearing Between the discs, when the thermal pressure head applies force to the pressing jig, the second buffer member exerts force on the object evenly. 5. The welding and pressing machine according to claim 1, characterized in that: the lower opening of the hole tightly wraps the welding spot. 6. The welding press machine as claimed in claim 1, wherein the light source is used to generate a laser beam. 7. The welding and pressing machine according to claim 1, characterized in that: the welding and pressing machine further comprises a moving stage, which is used to move the carrier plate so that the solder joints of the objects move to the opening of the pressing jig. 8 . The welding and pressing machine according to claim 1 , wherein the carrying plate carries several objects at the same time. 9. The welding and pressing machine according to claim 1, wherein the distance between the lower surface of the pressing jig and the focusing mirror is smaller than the focal length of the focusing mirror.

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