CN220825577U

CN220825577U - Laser welding equipment

Info

Publication number: CN220825577U
Application number: CN202322483475.8U
Authority: CN
Inventors: 林士圣; 游智伟
Original assignee: Jurong Technology Co ltd
Current assignee: Jurong Technology Co ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-04-23
Anticipated expiration: 2033-09-13

Abstract

A laser welding apparatus for welding a plurality of workpieces to a substrate. The laser welding equipment comprises a carrier module, a pickup module, a pressing module and a laser heating module. The pick-up module is used for picking up the carrier plate and placing the carrier plate on the substrate. One end of each workpiece is attached to the carrier plate, and the other end of each workpiece is positioned on the surface of the substrate. The pressing module presses the periphery of the carrier plate, and the projection of the area of the carrier plate, which is not pressed, in the vertical direction covers a plurality of workpieces. The laser heating module comprises a laser heater and a magnetic rolling device. The laser heating module advances along a preset route on the carrier plate, and the laser heater sequentially heats the workpieces to be welded on the surface of the substrate. The magnetic rolling device rolls the pressed part of the ballast plate corresponding to the laser heater, so that the workpiece corresponding to the pressed part contacts with the surface of the substrate.

Description

Laser welding equipment

Technical Field

The present utility model relates to a laser welding apparatus, and more particularly, to a laser welding apparatus capable of generating magnetic control thrust and pressing a carrier plate and a substrate together when welding a workpiece.

Background

The laser welding technology is a recently rising technical field, and along with the vigorous development of the automobile industry and consumer electronic products, the traditional welding process is gradually unable to meet the manufacturing requirements. Among them, laser galvanometer welding is a recently widely used technique that welds a workpiece with laser as a welding heat source and deflects the laser by a galvanometer. The vibrating mirror welding equipment can be composed of a laser source, a vibrating mirror, a lens, a clamp, an air blowing mechanism and the like, wherein laser is deflected through the vibrating mirror, and the deflected laser is focused on a workpiece through the lens. The blowing mechanism can blow away dust or improve the condition of the black focus of the welding part.

However, in the prior art, the processed object is first placed on the temporary carrier plate, and then laser-welded after being placed toward the substrate. Insufficient lamination between the temporary carrier plate and the substrate can generate a gap between the processed object and the substrate, so that the thermal welding can not be performed, and the welding yield is reduced.

Therefore, how to improve the yield of workpiece welding by improving the design of laser welding structure to overcome the above-mentioned drawbacks has become one of the important problems to be solved by this industry.

Disclosure of utility model

The utility model aims to solve the technical problem of providing a laser welding device with a magnetic rolling press aiming at the defects of the prior art.

In order to solve the above technical problems, one of the technical solutions adopted in the present utility model is to provide a laser welding apparatus for welding a plurality of workpieces on a substrate, wherein two opposite ends of each workpiece define an attaching end and a welding end, and the laser welding apparatus includes a carrier module, a pick-up module, a pressing module and a laser heating module. The carrier module is used for carrying the substrate and comprises a carrier and a magnetic absorber, wherein the magnetic absorber is positioned in the carrier or on the surface of the carrier. The pick-up module is used for picking up the carrier plate and placing the carrier plate on the base plate, and the carrier plate is provided with a pick-up surface and an opposite attaching surface, and the attaching surface faces the base plate, and the attaching ends of the workpieces are attached to the attaching surface, and the welding ends of the workpieces are positioned on the surface of the base plate. The pressing module presses the periphery of the pick-up surface, wherein the projection of the area, which is not pressed, of the pick-up surface in the vertical direction covers a plurality of workpieces. The laser heating module comprises a laser heater and at least one magnetic rolling device, wherein the at least one magnetic rolling device is positioned on one side of the laser heater. The laser heating module advances along a preset route on the pick-up surface, and the laser heater emits laser beams towards the pick-up surface to sequentially weld each workpiece on the surface of the substrate. The magnetic attraction of the magnetic attractor of at least one magnetic rolling device rolls the pressed part of the pick-up surface, so that the welding end of the workpiece corresponding to the pressed part is indeed electrically contacted with the surface of the substrate.

According to a possible implementation, the number of the magnetic rolling devices is two, and the magnetic rolling devices are respectively positioned at two ends of the laser heater in the advancing direction; each magnetic roller comprises a plurality of rollers.

According to a possible embodiment, the laser welding apparatus further includes a processing module electrically connected to the laser heating module, wherein the processing module can set the magnetic attraction force applied by the magnetic attractor to control the rolling force of the magnetic rolling device on the pressed portion.

According to a possible embodiment, the laser welding apparatus further includes a detecting module electrically connected to the processing module, the detecting module is configured to detect a height of the pick-up surface of the carrier in a vertical direction, transmit a detection signal to the processing module, and the processing module correspondingly sets a value of the magnetic attraction force of the magnetic attraction device according to the detection signal.

According to one possible embodiment, the detecting module includes a plurality of optical detectors disposed in sequence corresponding to the predetermined paths, wherein one of the optical detectors is disposed adjacent to the laser heater, the plurality of optical detectors respectively detect the heights of the carrier plate in the vertical direction, and transmits a detection signal to the processing module, and the processing module correspondingly sets the values of the magnetic attraction force according to the plurality of detection signals.

According to a possible embodiment, the rollers are strip-shaped rollers or rollers bars.

The laser welding device has the advantages that the laser welding device can press the periphery of the pick-up surface through the pressing module, the projection of the area, which is not pressed, of the pick-up surface in the vertical direction covers a plurality of workpieces, and the laser heating module moves on the pick-up surface along a preset route, and the laser heater emits laser beams towards the pick-up surface to sequentially weld the workpieces on the surface of the substrate. The technical scheme of the magnetic rolling device is characterized in that the magnetic attraction force of the magnetic rolling device is rolled on the pressed part of the pick-up surface, so that the welding end of the workpiece corresponding to the pressed part is in firm electrical contact with the surface of the substrate, the carrier plate and the substrate are tightly pressed when the workpiece is heated, the workpiece is ensured to be firmly welded on the substrate, and the welding yield of the workpiece is improved.

For a further understanding of the nature and the technical aspects of the present utility model, reference should be made to the following detailed description of the utility model and the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the utility model.

Drawings

Fig. 1 is a schematic diagram of a laser welding apparatus according to an embodiment of the utility model.

Fig. 2A-2B are schematic views of a pick-up module according to an embodiment of the utility model.

Fig. 3A is a top view of a pressing module according to an embodiment of the utility model.

Fig. 3B is a diagram illustrating the use of the embodiment shown in fig. 3A.

Fig. 4 is a schematic diagram illustrating a laser heating module according to an embodiment of the utility model.

Fig. 5 is a schematic diagram illustrating a laser heating module traveling along a preset path according to an embodiment of the utility model.

Fig. 6 is a top view of a laser heating module according to an embodiment of the utility model.

Fig. 7 is a top view of a laser heating module according to an embodiment of the utility model.

Fig. 8 is a schematic diagram of a laser welding apparatus according to an embodiment of the utility model.

FIG. 9 is a diagram illustrating a relationship between a laser heating module and an optical detector according to an embodiment of the utility model.

Detailed Description

The following description is given of specific embodiments of the disclosed laser welding apparatus, and those skilled in the art will appreciate the advantages and effects of the present utility model from the disclosure herein. The utility model is capable of other and different embodiments and its several details are capable of modification and variation in various respects, all from the point of view and application, all without departing from the spirit of the present utility model. The drawings of the present utility model are merely schematic illustrations, and are not intended to be drawn to actual dimensions. The following embodiments will further illustrate the related art content of the present utility model in detail, but the disclosure is not intended to limit the scope of the present utility model.

In addition, the term "or" as used herein shall include any one or combination of more of the associated listed items as the case may be.

Referring to fig. 1 to 5, fig. 1 is a schematic diagram illustrating a structure of a laser welding apparatus 1A according to an embodiment of the utility model. Fig. 2A to 2B are schematic views of a carrier module 10 and a pick-up module 11 according to an embodiment of the utility model. Fig. 3A is a top view of a press module 12 according to an embodiment of the present utility model. Fig. 3B is a diagram illustrating the use of the embodiment shown in fig. 3A. Fig. 4 is a schematic diagram illustrating the use of the laser heating module 13 according to an embodiment of the utility model. Fig. 5 is a schematic diagram illustrating the laser heating module 13 traveling along the preset path P according to an embodiment of the utility model.

The laser welding apparatus 1A is used for welding a plurality of workpieces 2 on a substrate 4, wherein the opposite ends of each workpiece 2 define an attaching end 21 and a welding end 22, and the laser welding apparatus 1A comprises a carrier module 10, a pick-up module 11, a pressing module 12 and a laser heating module 13. The stage module 10 carries the substrate 4, the stage module 10 includes a stage 101 and a magnetic absorber 102, the magnetic absorber 102 is located in the stage 101 or on the surface of the stage 101, and in this embodiment, the magnetic absorber 102 is located inside the stage 101. The pick-up module 11 is used for picking up the carrier plate 3 and placing the carrier plate 3 on the substrate 4, the carrier plate 3 is provided with a pick-up surface 31 and an opposite attaching surface 32, the attaching surface 32 faces the substrate 4, the attaching end 21 of each workpiece 2 is attached to the attaching surface 32, and the welding end 22 of each workpiece 2 is located on the surface of the substrate 4. The pressing module 12 presses the periphery of the pickup surface 31, and the projection of the area of the pickup surface 31, which is not pressed, in the vertical direction D1 covers a plurality of workpieces 2. The laser heating module 13 includes a laser heater 131 and a magnetic roller 132, and the magnetic roller 132 is located at one side of the laser heater 131. The laser heating module 13 travels along a preset path P on the pickup surface 31, and the laser heater 131 emits a laser beam L toward the pickup surface 31 to sequentially weld each workpiece 2 on the surface of the substrate 4. The magnetic roller 132 receives the magnetic attraction force of the magnetic attraction device 102, and rolls the pressed portion 3111 of the pick-up surface 31, so that the welding end 22 of the workpiece 2 corresponding to the pressed portion 3111 is surely electrically contacted to the surface of the substrate 4. The magnetic attractor 102 is, for example, a magnet or an electromagnet, and the present utility model is not limited thereto.

The aforementioned carrier plate 3 may be, but is not limited to, glass. The substrate 4 is, for example, a circuit board, and the surface of the circuit board is provided with a conductive material. According to some embodiments, the workpieces 2 are uLED (micro diodes) or semiconductor chips, uLED (or semiconductor chips) are arranged in an array, wherein an adhesive layer is disposed between the carrier 3 and the workpieces 2, and the attaching ends 21 of the workpieces 2 can be attached to the carrier 3 through the adhesive layer. It should be noted that, after the workpiece 2 is welded to the substrate 4, the bonding force is greater than the adhesion force of the adhesive layer, so that the adhesion end 21 of the workpiece 2 can separate the adhesive layer (i.e. the workpiece 2 is separated from the carrier 3) when the carrier 3 is removed.

As shown in fig. 3A and 3B, the pressing module 12 includes a frame, and according to some embodiments, the frame of the pressing module 12 is made of metal, such as steel. The frame presses the carrier 3 to expose a portion of the pick-up surface 31 of the carrier 3 (i.e., an unpressed portion, defining a processing surface 311), and the projection of the processing surface 311 in the vertical direction D1 covers the plurality of workpieces 2, so that the laser heater 131 can project the laser beam L onto the carrier 3 and the workpieces 2 to heat the solder balls under the workpieces 2 under the processing surface 311. The laser beam L projected by the laser heater 131 may cover a plurality of workpieces 2 (ranks such as 1×3, 2×2, or 3×1, the present utility model is not limited). That is, the laser beam L can heat solder balls under a plurality of workpieces 2 at the same time.

For the carrier 3 and the substrate 4, the pressing module 12 uses gravity as a coarse adjustment mechanism for the tight relationship between the carrier 3 and the substrate 4, so that the welding end 22 of the workpiece 2 (via the solder ball) is in electrical contact with the surface of the substrate 4, which is beneficial to the laser heating welding procedure, and fine adjustment of the tight relationship between the carrier 3 and the substrate 4 is performed while the laser heating module moves (as described in detail below).

As shown in fig. 4 and 5, the laser heating module 13 includes a laser heater 131 and two magnetic rollers 132, and the magnetic rollers 132 are respectively located on the front and rear sides of the laser heater 131, i.e. on both ends of the moving direction D3 (see fig. 6). Each magnetic roller 132 has a magnetic roller body 1321 for pressing the pick-up surface 31 and rolling the pressing portion 3111, so that the workpiece 2 under the pressing portion 3111 contacts the substrate 4, and the solder balls are heated smoothly and then the workpiece 2 is fixed on the surface of the substrate 4. The force with which the roller 1321 rolls the pick-up surface 31 is determined by the magnitude of the magnetic attraction provided by the magnetic attractor 102. The laser heating module 13 follows a predetermined path P, which in this embodiment is substantially "S", and after the laser heating module 13 follows the predetermined path P, the workpiece 2 under the attaching surface 32 can be welded to the substrate 4.

Please refer to fig. 6 and fig. 7, which are top views of a laser heating module 13 according to an embodiment of the utility model. In such embodiments, each magnetic roller 132 has a plurality of rollers 1321. The rollers 1321 are, for example, strip-shaped rollers or rollers, and the difference is that the number and arrangement of the rollers 1321 are different according to the embodiments, however, these embodiments are merely examples, and the utility model is not limited thereto.

Fig. 8 is a schematic diagram of a laser welding apparatus 1B according to an embodiment of the utility model. Please refer to fig. 4, 6 and 7 again. In the embodiment shown in fig. 8, the laser welding apparatus 1B further includes a processing module 14 electrically connected to the laser heating module 13, and the processing module 14 can set the magnetic attraction value (magnitude) provided by the magnetic roller 132. The processing module 14 is, for example, but not limited to, a computer, and the user can set the magnetic attraction value of the magnetic attraction device 102 through the processing module 14 to further control the rolling force of the magnetic rolling device 132 on the pressed portion 3111.

As shown in fig. 8, in this embodiment, the laser welding apparatus 1B further includes a detecting module 15 electrically connected to the processing module 14, wherein the detecting module 15 is configured to detect the height of the pick-up surface 31 of the carrier 3 in the vertical direction D1, send a detection signal to the processing module 14, and according to the detection signal, the processing module 14 correspondingly sets the value of the magnetic attraction force of the magnetic attraction device 102 so as to conform to the rolling force required by the actual magnetic rolling device 132 on the pressed portion 3111. According to some embodiments, the detecting module 15 is an optical detector, detects the height of the pick-up surface 31 of the carrier 3, transmits a detection signal to the processing module 14, and according to the detection signal, the processing module 14 correspondingly sets the value of the magnetic attraction force provided by the magnetic attraction device 102 to control the rolling force of the magnetic rolling device 132 so as to ensure that the workpiece 2 is firmly welded on the substrate 4.

Referring to fig. 9, a schematic diagram of the relationship between the laser heating module 13 and the detecting module 15 according to an embodiment of the utility model is shown, and it should be noted that fig. 9 is a top view. In these embodiments, the lightning detection module 15 includes a plurality of optical detectors (described below) sequentially corresponding to the preset paths P, one of the optical detectors is disposed adjacent to the laser heater 131, the plurality of optical detectors respectively detects the height of the carrier 3 in the vertical direction D1 and transmits detection signals to the processing module 14, and the processing module 14 correspondingly sets the magnetic attraction value according to the detection signals.

As shown in fig. 9, two magnetic rollers 132 are respectively located on the front and rear sides of the laser heater 131, in this embodiment, the detection module 15 has three optical detectors 151-153, wherein the first optical detector 151 is located at the first position in the traveling direction (along the moving direction D3 of the preset path P), the second optical detector 152 is located at the second position, and the third optical detector 153 is located at the third position. During processing, the first optical detector 151 detects the height of the processing surface 311 in the vertical direction D1, generates a detection signal, and transmits the detection signal to the processing module 14, the processing module 14 stores data about the preset height of the carrier 3, whether the gap between the carrier 3 and the substrate 4 changes compared with the detection signal, for example, whether the preset height data is 1 (arbitrary unit) and the height data of the detection signal is 1.2 (arbitrary unit), and the processing module 14 correspondingly sets the magnetic attraction force provided by the magnetic attractor 102 for a difference of 0.2 (arbitrary unit), further controls the rolling force of the magnetic rolling device 132 on the pressed portion 3111, so that the height data of the pressed portion 3111 is 1 and the height data of the pressed portion 3111 is detected by the second optical detector 152. The height of the processing surface 311 is then detected by the third optical detector 153 to ensure that the height of the processing surface 311 corresponds to the predetermined height described above, so as to facilitate the laser heater 131 to heat the welding workpiece 2 on the substrate 4.

According to some embodiments, the processing module 14 includes or is connected to a storage device, where the height difference value and the corresponding magnetic attraction value to be set are stored, so that, in the process, the processing module 14 can quickly set the magnetic attraction value of the magnetic attraction device 102 according to the height difference value, further control the rolling force of the magnetic rolling device 132, and ensure that the welding end 22 of the workpiece 2 under the carrier 3 contacts the substrate 4, so as to facilitate the heating welding of the laser heating module 13 and improve the welding efficiency.

Advantageous effects of the embodiments

Furthermore, according to an embodiment, the laser welding apparatus includes a processing module, and a user can set a magnetic attraction value of the magnetic attraction device through the processing module to further control a rolling force of the magnetic rolling device, so as to better meet the requirements of actual welding engineering.

In addition, according to an embodiment, the detection module includes a plurality of optical detectors for respectively detecting the heights of the surfaces of the carrier plates, and transmitting detection signals to the processing module, and according to the detection signals, the processing module correspondingly sets the values of the magnetic attraction force of the magnetic attractors, correspondingly adjusts the rolling force channels of the magnetic rolling device so as to conform to and ensure that the workpieces are welded on the substrate smoothly.

The foregoing disclosure is only a preferred embodiment of the present utility model and is not intended to limit the scope of the claims, so that all equivalent technical changes made by the application of the present utility model and the accompanying drawings are included in the scope of the claims.

Claims

1. A laser welding apparatus for welding a plurality of workpieces to a substrate, each of the workpieces defining an attachment end and a welding end at opposite ends thereof, the apparatus comprising:

The carrier module is used for bearing the substrate and comprises a carrier and a magnetic absorber, wherein the magnetic absorber is positioned in the carrier or on the surface of the carrier;

the carrier plate is provided with a pick-up surface and an opposite attaching surface, the attaching surface faces the substrate, the attaching ends of the workpieces are attached to the attaching surface, and the welding ends of the workpieces are positioned on the surface of the substrate;

The pressing module presses the periphery of the pick-up surface, wherein the projection of the area, which is not pressed, of the pick-up surface in a vertical direction covers the plurality of workpieces; and

The laser heating module comprises a laser heater and at least one magnetic rolling device, wherein the at least one magnetic rolling device is positioned at one side of the laser heater;

The laser heating module moves on the picking surface along a preset route, and the laser heater sends out a laser beam towards the picking surface so that each workpiece is welded on the surface of the substrate in sequence;

the at least one magnetic rolling device is rolled on a pressed part of the pick-up surface under the magnetic attraction of the magnetic attraction device, so that the welding end of the workpiece corresponding to the pressed part is indeed in electrical contact with the surface of the substrate.

2. The laser welding apparatus according to claim 1, wherein the number of the magnetic rolls is two, and the magnetic rolls are respectively positioned at both ends of the laser heater in a forward direction; each of the magnetic rolls includes a plurality of rolls.

3. The laser welding apparatus according to claim 1 or 2, further comprising a processing module electrically connected to the laser heating module, the processing module being configured to set the magnetic attraction force applied by the magnetic attraction device to control a rolling force of the magnetic rolling device on the pressed portion.

4. The laser welding apparatus according to claim 3, further comprising a detection module electrically connected to the processing module, wherein the detection module is configured to detect a height of the pick-up surface of the carrier in the vertical direction, and transmit a detection signal to the processing module, and the processing module correspondingly sets the value of the magnetic attraction force of the magnetic attraction device according to the detection signal.

5. The laser welding apparatus according to claim 4, wherein the detection module includes a plurality of optical detectors disposed in sequence corresponding to the predetermined paths, wherein one of the optical detectors is disposed adjacent to the laser heater, the plurality of optical detectors respectively detect the heights of the carrier plate in the vertical direction, and transmits a detection signal to the processing module, and the processing module correspondingly sets the value of the magnetic attraction force according to the plurality of detection signals.

6. The laser welding apparatus according to claim 2, wherein the roller is a bar roller or a rod.