A welding apparatus and welding system

Abstract

The embodiments of the present application disclose a welding device and a welding system for improving the thermal uniformity of a heated object. The embodiments of the present application comprise a plurality of laser units, a plurality of thermometers, a controller and a bearing platform; the bearing platform is provided with a bearing surface for bearing the heated object; the bearing surface is divided into a plurality of sub-zones in advance; each of the plurality of laser units is arranged opposite to the bearing surface, and different laser units are used for emitting laser to different sub-zones of the bearing surface; each of the plurality of thermometers is arranged opposite to the bearing surface, and different thermometers are used for collecting the temperature of different sub-zones of the bearing surface; the controller is electrically connected with the laser unit and the thermometer corresponding to each of the sub-zones, and the controller is used for adjusting the power of the laser unit of each sub-zone based on a proportional-integral-derivative control method, so that the temperature collected by the thermometer of each sub-zone is maintained at the same temperature.

Description

Technical Field

[0001] This application relates to the field of welding, and more particularly to a welding device and a welding system. Background Technology

[0002] Laser welding is an important application of materials processing technology. It is a method of welding that uses the heat generated by a laser beam to bombard the object being heated. Lasers have optical properties such as refraction and focusing, so laser welding is suitable for heating objects such as PCB circuit boards, LED light boards, and mini-LED light boards. It has advantages such as low heat input, small welding deformation, and minimal impact from electromagnetic fields, bringing convenience to people.

[0003] However, in existing laser welding solutions, when the laser emitter of the laser welding equipment is aimed at the object to be heated for welding, the thermal uniformity of the heated object is poor due to the aging of the laser welding equipment and the different materials of the heated object. The temperature values ​​of the heated object cannot be the same in a certain range, which brings certain inconveniences to the welding work. Utility Model Content

[0004] This application provides a welding device and welding system for improving the thermal uniformity of heated objects.

[0005] The first aspect of this application provides a welding device, including: multiple laser units, multiple temperature measuring instruments, a controller, and a support platform;

[0006] The support platform is provided with a support surface for supporting the heated object; the support surface is pre-divided into multiple zones;

[0007] Each of the plurality of laser units is disposed facing the bearing surface, and different laser units are used to emit lasers to different sections of the bearing surface;

[0008] Each of the plurality of temperature measuring instruments is arranged facing the bearing surface, and different temperature measuring instruments are used to collect the temperature of different zones of the bearing surface;

[0009] The controller is electrically connected to the laser unit and the thermometer corresponding to each of the partitions. The controller is used to adjust the power of the laser unit of each partition based on the proportional-integral-derivative control method so that the temperature collected by the thermometer of each partition is maintained at the same temperature.

[0010] Optionally, the laser unit is a continuous carbon dioxide laser or a fiber continuous laser.

[0011] Optionally, a heating plate is provided on the back of the bearing surface, and the heating plate is used to heat the object being heated on the bearing surface.

[0012] Optionally, the heating plate includes multiple heating units, and each partition on the bearing surface has its own corresponding heating unit, which is used to heat the corresponding partition.

[0013] Optionally, a fixing member for fixing the heated object is provided on the bearing surface, and the fixing member presses the heated object tightly against the bearing surface when the heated object needs to be fixed.

[0014] Optionally, the fastener is an aluminum strip or a ceramic strip.

[0015] Optionally, the welding equipment further includes: a slide rail;

[0016] The plurality of laser units are slidably connected to the slide rail, so that the plurality of laser units can slide on the slide rail to adjust the partitions on the bearing surface that the plurality of laser units are aligned with.

[0017] Optionally, the welding equipment may further include: a robotic arm;

[0018] The plurality of laser units are connected to the robotic arm, which is used to adjust the spatial position of the plurality of laser units in order to adjust the partitions on the bearing surface that the plurality of laser units are aligned with.

[0019] Optionally, the laser unit is a solid-state laser or a semiconductor laser.

[0020] A second aspect of this application provides a welding system, including the aforementioned welding equipment, and further including: a display;

[0021] The display is electrically connected to the welding equipment and is used to display the temperature parameters sent by the welding equipment.

[0022] As can be seen from the above technical solutions, the embodiments of this application have the following advantages:

[0023] The welding equipment of this application is equipped with multiple laser units and multiple temperature measuring instruments. Each laser unit has its own corresponding zone and temperature measuring instrument. The controller adjusts the power of each laser unit according to the temperature transmitted from the temperature measuring instrument and the preset target temperature, so that the temperature of all zones on the bearing surface corresponding to all laser units is the preset target temperature (i.e., maintained at the same temperature), thereby ensuring the thermal uniformity of the heated object. Based on zoned temperature control, the thermal uniformity is better than existing solutions, bringing greater convenience to the welding work. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0025] Figure 1 This is a schematic diagram of an embodiment of a welding device disclosed in this application;

[0026] Figure 2 This is a schematic diagram of another embodiment of a welding device disclosed in this application.

[0027] The attached figures are labeled as follows:

[0028] 1. Controller; 2. Temperature measuring instrument; 3. Support platform; 4. Object to be heated; 5. Laser unit; 6. Heating unit; 7. Fixture; 8. Slide rail. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] This application provides a welding device and welding system for improving the thermal uniformity of heated objects.

[0031] Laser welding technology has been widely used in the welding field. Existing laser welding methods utilize a laser beam aimed at the object to be heated, generating heat for welding. However, in existing methods, due to factors such as aging laser welding equipment and variations in the material of different parts of the heated object, the thermal uniformity of the heated object is poor, causing inconvenience to the welding process. To address these issues, this application provides a welding device and system, comprising multiple laser units and multiple temperature measuring instruments. Each laser unit has its own corresponding zone and temperature measuring instrument. The controller adjusts the power of each laser unit based on the temperature transmitted from the temperature measuring instrument and the preset target temperature, ensuring that the temperature of all zones on the bearing surface corresponding to all laser units reaches the preset target temperature, thereby guaranteeing the thermal uniformity of the heated object. Based on zoned temperature control, the thermal uniformity is better than existing methods, bringing significant convenience to the welding process.

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0033] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0034] The following describes a welding apparatus according to this application. Please refer to [link / reference]. Figure 1 One embodiment of a welding device according to this application includes: multiple laser units 5, multiple temperature measuring instruments 2, a controller 1, and a support platform 3;

[0035] The support platform 3 is provided with a support surface for supporting the heated object 4; the support surface is pre-divided into multiple partitions;

[0036] Each of the plurality of laser units 5 is disposed facing the bearing surface, and different laser units 5 are used to emit lasers to different partitions of the bearing surface;

[0037] Each of the plurality of temperature measuring instruments 2 is arranged facing the bearing surface, and different temperature measuring instruments 2 are used to collect the temperature of different zones of the bearing surface;

[0038] The controller 1 is electrically connected to the laser unit 5 and the thermometer 2 corresponding to each of the partitions. The controller 1 is used to adjust the power of the laser unit 5 of each partition based on the proportional-integral-derivative control method so that the temperature collected by the thermometer 2 of each partition is maintained at the same temperature.

[0039] The working principle of this embodiment will now be explained. Each laser unit 5 corresponds to a partition and also to a temperature measuring instrument 2. That is, for each partition, only one laser unit 5 emits laser light and one temperature measuring instrument 2 measures the temperature. The number of laser units 5 and temperature measuring instruments 2 is equal to the number of partitions. The object to be heated 4 is placed on the support platform 3, and the laser unit 5 and temperature measuring instrument 2 are activated. The temperature measuring instrument 2 will collect the temperature data of the support surface on the support platform 3 in real time. The temperature data refers to the real-time temperature value of each partition. The controller 1 compares the temperature data with the preset target temperature. For each partition, after calculating the real-time temperature difference, it calculates the corresponding power difference based on the proportional-integral-derivative (PID) control formula to control the operation of the corresponding laser unit 5, thereby ultimately controlling the power of each laser unit 5 to emit laser light to the object to be heated 4. During the heating and welding process, if the temperature of one part of the object to be heated 4 is too low and the temperature of another part is too high, the power of the laser unit 5 corresponding to the partitions of these two parts needs to be adjusted to change the temperature of these two parts and ensure the thermal uniformity of the object to be heated 4.

[0040] Furthermore, adjusting the power of each laser unit 5 based on temperature data, a preset target temperature, and PID control, thereby regulating the temperature of the corresponding zone, is a conventional technique without substantial improvement. As described in paragraphs 0039 to 0050 of the specification document CN210626996U, this scheme uses PID control to adjust power, thereby regulating temperature, and then uses temperature detection to ensure a constant temperature. Those skilled in the art can easily conceive of the methods involved based on this document and other existing technologies.

[0041] In this embodiment, the welding equipment is equipped with multiple laser units 5 and multiple temperature measuring instruments 2. Each laser unit 5 has its own corresponding zone and temperature measuring instrument 2. The controller 1 adjusts the power of each laser unit 5 according to the temperature data transmitted from the temperature measuring instrument 2 and the preset target temperature, so that the temperature of all zones on the bearing surface corresponding to all laser units 5 is the preset target temperature, thereby ensuring the thermal uniformity of the heated object. Based on zoned temperature control, the thermal uniformity is better than that of existing solutions, bringing greater convenience to the welding work.

[0042] Please see Figure 2 Another embodiment of the welding equipment of this application includes: multiple laser units 5, multiple temperature measuring instruments 2, a controller 1, and a support platform 3;

[0043] The support platform 3 is provided with a support surface for supporting the heated object 4; the support surface is pre-divided into multiple partitions;

[0044] Each of the plurality of laser units 5 is disposed facing the bearing surface, and different laser units 5 are used to emit lasers to different partitions of the bearing surface;

[0045] Each of the plurality of temperature measuring instruments 2 is arranged facing the bearing surface, and different temperature measuring instruments 2 are used to collect the temperature of different zones of the bearing surface;

[0046] The controller 1 is electrically connected to the laser unit 5 and the thermometer 2 corresponding to each of the partitions. The controller 1 is used to adjust the power of the laser unit 5 in each partition based on the proportional-integral-derivative control method, so that the temperature collected by the thermometer 2 in each partition is maintained at the same temperature. Specifically, the power of each laser unit 5 is controlled independently, so the temperature of the partition corresponding to each laser unit 5 is also controlled independently. The thermometer can be an infrared thermometer based on infrared light, or a thermal imager or other types of thermometers, which are not limited here. The laser unit can be a continuous carbon dioxide laser or a fiber continuous laser, or other types, which are not limited here.

[0047] When the object being heated 4 is small, existing laser welding equipment emits a portion of the laser beam onto the object and another portion onto the area surrounding it. This means the laser emitting surface is larger than the object, leading to wasted energy and high power consumption. To address this issue, the controller 1 in this application further adjusts the power of the laser units 5 corresponding to pre-defined zones not covered by the object 4 to zero. Specifically, the user can pre-set which zones are enabled and disabled based on the actual size of the object 4, and correspondingly set the power of the laser units 5. The power of the laser units 5 corresponding to the zones covered by the object 4 is not zero, while the power of the laser units 5 corresponding to other zones is zero. Alternatively, a comparison can be made based on temperature data. This involves comparing the temperature data before and after placing the object 4. The size of the object 4 can be determined by analyzing the significant temperature differences, and the laser units 5 not covering the object 4 can be disabled to save power.

[0048] In existing solutions, laser welding equipment only heats one side of the object 4, leaving the back side unheated. This results in uneven heating and potential deformation. To address this issue, the bearing surface of the platform 3 is designed to heat the object 4 simultaneously, while the front side is heated by the laser module 1, preventing uneven heating and deformation. Furthermore, for more efficient welding, each section of the bearing surface can be equipped with its own heating unit 6 for temperature regulation. Specifically, each section of the bearing surface has its own corresponding heating unit 6, which heats its assigned section by adjusting the temperature based on the control signal obtained from the temperature data analysis of the thermometer 2, sent by the controller 1. The control of the heating unit 6 also relies on real-time temperature data, which is applied to both the heating unit 6 and the laser unit 5.

[0049] To further prevent deformation of the heated object 4, a fixing member 7 can be provided to fix the heated object 4. Specifically, a fixing member 7 is provided on the bearing surface to fix the heated object 4. When the heated object 4 needs to be fixed, the fixing member 7 presses the heated object 4 tightly against the bearing surface. The fixing member 7 tightly presses against the heated object 4, which can prevent its deformation. The material and shape of the fixing member 7 can be set according to actual needs, and are not limited here. Preferably, the fixing member 7 is an aluminum strip or a ceramic strip.

[0050] When welding a large area of ​​the object 4 to be heated, the laser emitting ends of the multiple laser units 5 are often not large enough, resulting in low welding efficiency. In this case, it is necessary to move the laser units 5 to adjust the welding position to meet the requirements of welding a large area of ​​the object 4. This movement can be achieved using a slide rail 8 or a robotic arm, etc., and is not specifically limited here. Two implementation methods are described below. In one implementation, the welding equipment further includes a slide rail 8, to which the multiple laser units 5 are slidably connected, allowing the multiple laser units 5 to slide on the slide rail 8 and adjust the partitions on the bearing surface aligned with the multiple laser emitting ends. The slide rail 8 can be arranged horizontally or obliquely, and its specific installation position is not limited, as long as it allows the lasers emitted by the laser units 5 to reach the object 4 to be heated. In another implementation, the welding equipment further includes a robotic arm, to which the multiple laser units 5 are connected. The robotic arm is used to adjust the spatial position of the multiple laser units 5 to adjust the partitions on the bearing surface aligned with the multiple laser emitting ends. The spatial range involved by the robotic arm can be set according to actual needs and is not specifically limited here. This embodiment uses the first implementation method as an example for illustration.

[0051] In addition, the laser unit 5 can be a solid-state laser, a semiconductor laser, or other types, etc., and is not specifically limited here.

[0052] The working principle of this embodiment will now be illustrated with an example. The object to be heated 4 is placed on the support platform 3. The laser unit 5 and the temperature measuring instrument 2 are activated. The temperature measuring instrument 2 collects the temperature data of the support surface on the support platform 3 in real time. When the object to be heated 4 is small, the power of the laser unit 5 and heating unit 6 corresponding to the unused partitions is set to zero based on the temperature data. When the object to be heated 4 is large, the laser unit 5 is controlled to reciprocate based on the temperature data to heat and weld various parts of the object to be heated 4. The laser unit 5 and heating unit 6 of the laser module 1 corresponding to the partitions covered by the object to be heated 4 are controlled to work, emitting lasers to the object to be heated 4 and providing auxiliary heating. During the heating and welding process, if one part of the object to be heated 4 is too cold and another part is too hot, the power of the laser unit 5 and heating unit 6 corresponding to these two parts needs to be adjusted to change the temperature of these two parts, ensuring the thermal uniformity of the object to be heated 4.

[0053] In this embodiment, the welding equipment is equipped with multiple laser units 5 and multiple temperature measuring instruments 2. Each laser unit 5 has its own corresponding zone and temperature measuring instrument 2. The controller 1 adjusts the power of each laser unit 5 according to the temperature data transmitted from the temperature measuring instrument 2 and the preset target temperature, so that the temperature of all zones on the bearing surface corresponding to all laser units 5 is the preset target temperature, thereby ensuring the thermal uniformity of the heated object. Based on zoned temperature control, the thermal uniformity is better than the existing solution, which brings greater convenience to the welding work. Furthermore, the bearing platform 3 can assist in heating and prevent the heated object 4 from deforming due to heat, and the fixing of the fixing part 7 can also prevent the heated object 4 from deforming. In addition, the laser unit 5 and heating unit 6 corresponding to the unused zone can be turned off by temperature data to save energy. Based on the slide rail 8 or robotic arm and other structures, the laser module 1 can move in real time, thereby changing the zone corresponding to the laser emitting surface, thereby uniformly heating all parts of the heated object 4, ensuring that the temperature of all parts of the heated object is roughly the same, and ensuring thermal uniformity.

[0054] The above describes a welding apparatus according to an embodiment of this application. The following describes a welding system according to an embodiment of this application. One embodiment of the welding system includes the welding apparatus as described above, and further includes: a display;

[0055] The display is electrically connected to the welding equipment and is used to display the temperature parameters sent by the welding equipment.

[0056] In this embodiment, the welding system can heat and weld the object 4 and ensure the thermal uniformity of the object 4, which greatly improves the welding efficiency. In addition, it can display the temperature parameters of the welding equipment on the display in real time, which is convenient for monitoring and management and brings great convenience to production personnel.

[0057] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing embodiments, and will not be repeated here.

[0058] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0059] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0060] In addition, the functional units in the various embodiments of this utility model can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0061] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A welding device, characterized in that, include: Multiple laser units, multiple temperature measuring instruments, controllers, and a support platform; The support platform is provided with a support surface for supporting the heated object; the support surface is pre-divided into multiple zones; Each of the plurality of laser units is disposed facing the bearing surface, and different laser units are used to emit lasers to different sections of the bearing surface; Each of the plurality of temperature measuring instruments is arranged facing the bearing surface, and different temperature measuring instruments are used to collect the temperature of different zones of the bearing surface; The controller is electrically connected to the laser unit and the thermometer corresponding to each of the partitions. The controller is used to adjust the power of the laser unit of each partition based on the proportional-integral-derivative control method so that the temperature collected by the thermometer of each partition is maintained at the same temperature.

2. The welding equipment according to claim 1, characterized in that, The laser unit is a continuous carbon dioxide laser or a fiber continuous laser.

3. The welding equipment according to claim 1, characterized in that, A heating plate is provided on the back of the bearing surface, and the heating plate is used to heat the object being heated on the bearing surface.

4. The welding equipment according to claim 3, characterized in that, The heating plate includes multiple heating units, and each partition on the bearing surface has its own corresponding heating unit, which is used to heat the corresponding partition.

5. The welding equipment according to claim 1, characterized in that, The bearing surface is provided with a fixing member for fixing the heated object. When the heated object needs to be fixed, the fixing member presses the heated object tightly against the bearing surface.

6. The welding equipment according to claim 5, characterized in that, The fastener is an aluminum strip or a ceramic strip.

7. The welding equipment according to claim 1, characterized in that, The welding equipment also includes: a slide rail; The plurality of laser units are slidably connected to the slide rail, so that the plurality of laser units can slide on the slide rail to adjust the partitions on the bearing surface that the plurality of laser units are aligned with.

8. The welding equipment according to claim 1, characterized in that, The welding equipment also includes: a robotic arm; The plurality of laser units are connected to the robotic arm, which is used to adjust the spatial position of the plurality of laser units in order to adjust the partitions on the bearing surface that the plurality of laser units are aligned with.

9. The welding equipment according to claim 1, characterized in that, The laser unit is a solid-state laser or a semiconductor laser.

10. A welding system, characterized in that, The welding apparatus as described in any one of claims 1 to 9 further includes: a display; The display is electrically connected to the welding equipment and is used to display the temperature parameters sent by the welding equipment.

Images