Laser welding positioning device and laser welding system

Abstract

The utility model discloses a laser welding positioning device and a laser welding system, which are used for positioning a to-be-welded piece on a product piece and comprise a bearing piece, a positioning piece and a positioning piece, the pressure applying piece can be close to or far away from the bearing piece in the first direction; the crimping positioning piece is arranged on the pressing piece, the crimping positioning piece comprises a crimping part, the crimping part is used for abutting against the to-be-welded piece and crimping and positioning the to-be-welded piece to the product piece, a through groove is formed in the crimping part, and the through groove penetrates through the crimping part in the first direction; and the pressure detection piece is used for detecting the pressure applied to the to-be-welded piece by the crimping part. Compared with the prior art, the pressure detection part is arranged to detect the pressure applied to the to-be-welded part by the crimping part, the pressure applied in the crimping process is monitored in real time, it is ensured that the pressure is within a proper range, the pressure applied to the product part by the crimping part is not too small, and the welding quality is ensured. And if the pressure is too small, the to-be-welded part shifts in the welding process, and if the pressure is too large, the copper bar is damaged or welded through.

Description

Technical Field

[0001] This utility model relates to the field of laser welding technology, and in particular to a laser welding positioning device and a laser welding system. Background Technology

[0002] In the field of vehicle motor controller assembly in the new energy vehicle assembly industry, frequency converters require frequent high-frequency, high-current, and high-thermal-conductivity loads, and the assembly points basically adopt high-strength welding processes.

[0003] In the existing technology, copper busbars need to be laser welded to the motor controller. Before welding, a pressure head is used to press and position the copper busbars at a preset position on the motor controller. However, if the pressing pressure is too high, it can easily cause the weld pool to burn through. Utility Model Content

[0004] The purpose of this invention is to provide a laser welding positioning device and a laser welding system to solve the technical problems in the prior art. It can ensure that the crimping pressure is moderate and avoid damage to the copper busbar or burn-through due to excessive pressure.

[0005] In a first aspect, this utility model provides a laser welding positioning device for positioning a workpiece to be welded onto a product part, comprising:

[0006] Support components, used to support product parts;

[0007] The pressure-applying component can move closer to or further away from the support component along a first direction;

[0008] A crimping positioning component is disposed on the pressure applying component. The crimping positioning component includes a crimping part, which is used to abut against the workpiece to be welded, so as to crimp and position the workpiece to be welded onto the product. The crimping part is provided with a through groove, which penetrates the crimping part along the first direction.

[0009] A pressure testing element is used to detect the pressure applied by the crimping portion to the workpiece to be welded.

[0010] In the laser welding positioning device described above, preferably, the positioning device further includes several venting components, the pressing positioning component is directly or indirectly connected to the venting components, the pressing component has a venting cavity inside, the venting component is disposed on the pressing component, and a venting channel is provided through the venting component. The venting channel has a first end and a second end. The first end of the venting channel communicates with the venting cavity, and the second end of the venting channel extends toward the pressing part and the pressing point of the workpiece to be welded.

[0011] In the laser welding positioning device described above, preferably, the pressure detection component includes a sliding block, a spring, and a pressure sensor, wherein:

[0012] The sliding block can be slidably fitted onto the venting component along the first direction, and the pressing and positioning component can be slidably fitted onto the sliding block along the first direction;

[0013] The pressure sensor is fixed to the vent, one end of the spring is connected to the sliding block, and the other end of the spring abuts against the pressure sensor.

[0014] In the laser welding positioning device described above, preferably, the pressing part includes a plurality of walls, which together form the through groove.

[0015] In the laser welding positioning device described above, preferably, the wall thickness of the wall body is 0.2-0.4 mm.

[0016] In the laser welding positioning device described above, preferably, a pressing protrusion is provided on the bottom of one of the wall bodies.

[0017] In the laser welding positioning device described above, preferably, the support includes a first tray and a second tray, the first tray being detachably mounted on the second tray, and the first tray being used to support the product.

[0018] In the laser welding positioning device described above, preferably, the second tray is provided with a support column, which is used to cooperate with a preset part on the product to support the product on the second tray.

[0019] In the laser welding positioning device described above, preferably, the pressure-applying member is connected to a height-adjusting member, which is used to adjust the distance between the pressure-applying member and the product part in the first direction.

[0020] Secondly, this utility model provides a laser welding system, including a production line, a laser welding positioning device, and a laser source, wherein the laser welding positioning device is the aforementioned laser welding positioning device, wherein:

[0021] The support member is disposed on the production line. The support member moves along a preset path following the production line. The preset path has a preset position. When the support member supports the product and reaches the preset position, the support member can reciprocate along the first direction.

[0022] Both the pressure-applying component and the laser source are located at the preset position. When the support component reaches the preset position, the pressure-applying component moves along the first direction, and the pressing and positioning component presses and positions the workpiece to be welded onto the product. The light emitted by the laser source passes through the through groove and reaches the welding point between the workpiece to be welded and the product.

[0023] Compared with the prior art, this utility model uses a pressure detection device to detect the pressure applied to the workpiece by the pressing part of the pressing and positioning device. By monitoring the pressure applied during the pressing process in real time, it ensures that the pressure is within a suitable range. The pressure applied by the pressing part to the workpiece is neither too small, which would cause the workpiece to shift during the welding process, nor too large, which would cause damage to the copper busbar or burn-through. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the positioning device provided in this embodiment of the utility model;

[0025] Figure 2 This is a front view of the pressure-applying component provided in this embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram showing the engagement state of the crimping positioning component, pressure detection component, and venting component provided in this embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram showing the location of the pressure sensor provided in this embodiment of the utility model;

[0028] Figure 5 This is a structural schematic diagram of the crimping and positioning component provided in this embodiment of the utility model;

[0029] Figure 6 This is a perspective view of the support member provided in an embodiment of this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10-Supporting component, 11-First pallet, 12-Second pallet, 13-Supporting column;

[0032] 20 - Pressure-applying component;

[0033] 30-Crimping positioning part, 31-Crimping part, 32-Through groove, 33-Wall, 34-Crimping protrusion, 35-Slider;

[0034] 40-Pressure sensing element, 41-Sliding block, 42-Spring, 43-Pressure sensor, 44-Fixed bracket, 45-Slide groove;

[0035] 50 - Ventilation component, 51 - Ventilation channel;

[0036] 60 - Height adjustment component;

[0037] D1 - First direction. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0039] like Figures 1 to 6 As shown, an embodiment of this utility model provides a laser welding positioning device, which is applied in a laser welding system to press and position the workpiece to be welded during the laser welding process, ensuring that the workpiece remains stable during the welding process and avoiding welding deviations caused by vibration or movement.

[0040] For ease of explanation of the structure of the positioning device, refer to Figure 1 as well as Figure 2 As shown, the direction of gravity is defined as the first direction D1, which helps to clarify the structural layout of the device and the relative positional relationship of each component, making it easier for technicians to understand and implement. Those skilled in the art will know that other directions can be defined as the first direction D1 according to actual application needs, but no such limitation is made here.

[0041] Reference Figures 1 to 3 As shown, the positioning device includes a support member 10, a pressure applying member 20, a pressing positioning member 30, and a pressure detection member 40, wherein:

[0042] The support component 10 is used to support the product component. In the embodiment provided by this utility model, the product component is a motor controller. The product component is detachably supported on the support component 10 and flows along the production line with the support component 10 to integrate the laser welding positioning device into the automated production process.

[0043] The pressure-applying component 20 is located above the support component 10 and can move closer to or further away from the support component 10 along the first direction D1, which is the direction of gravity. When the support component 10 has not reached below the pressure-applying component 20, the pressure-applying component 20 is in its initial state. When the support component 10, supporting the product, reaches below the pressure-applying component 20, the pressure-applying component 20 moves towards the support component 10 to press against the workpiece to be welded, applying pressure to ensure its stability during welding and improving the stability and quality of the weld. After the welding work is completed, the pressure-applying component 20 moves away from the support component 10 and returns to its initial state, allowing the support component 10 to continue circulating. In the embodiment provided by this utility model, the workpiece to be welded is a copper busbar.

[0044] A crimping positioning member 30 is disposed on the pressure applying member 20. The crimping positioning member 30 includes a crimping part 31, which is used to abut against the workpiece to be welded. The crimping positioning member 30 utilizes the force provided by the downward pressure of the pressure applying member 20 to crimp and position the workpiece to be welded onto the product part, ensuring that the workpiece to be welded maintains a precise position during the welding process. Through the action of the crimping positioning member 30, the workpiece to be welded can be effectively prevented from shifting due to external force or vibration during the welding process. The crimping part 31 is provided with a through groove 32, which extends through the crimping part 31 along the first direction D1. The through groove 32 is used to allow the laser beam emitted by the laser source to pass through, ensuring smooth welding, allowing the laser to act directly on the workpiece to be welded, reducing interference to other parts during the welding process, and improving welding speed and quality.

[0045] The pressure detection component 40 is used to detect the pressure applied by the crimping part 31 to the workpiece to be welded. By monitoring the pressure applied during the crimping process in real time, it ensures that the pressure is within a suitable range. The pressure applied by the crimping part 31 to the workpiece will not be too small or too large. If the pressure is too small, the workpiece to be welded will be displaced during the welding process. If the pressure is too large, the copper busbar will be damaged or burned through. This ensures the firmness and uniformity of the weld and reduces welding defects.

[0046] Furthermore, the positioning device is also provided with several venting components 50. The pressing positioning component 30 is directly or indirectly connected to the venting components 50. The venting components 50 can work in conjunction with the pressing positioning component 30. The number and distribution of the venting components 50 are determined according to the number and distribution of welding positions of the workpiece to be welded. The pressure applying component 20 is provided with a venting cavity. The venting components 50 are located on the pressure applying component 20. A venting channel 51 is provided through the venting component 50. The venting channel 51 has a first end and a second end, wherein:

[0047] The first end of the ventilation channel 51 can be connected to an air inlet connector. The air inlet connector is connected to the ventilation chamber through a hose. The ventilation chamber can store and distribute protective gas. The protective gas in the ventilation chamber flows into the ventilation channel 51 through the hose and the air inlet connector in sequence.

[0048] The second end of the ventilation channel 51 extends toward the crimping part 31 and the crimping part to be welded. After the crimping positioning part 30 abuts against the part to be welded and positions the part to be welded, the ventilation part 50 can be used to provide protective gas to the welding area to protect the welding area and prevent oxidation or contamination.

[0049] In the embodiments provided by this utility model, reference is made to Figure 3 as well as Figure 4 As shown, the pressure detection element 40 includes a sliding block 41, a spring 42, and a pressure sensor 43, wherein:

[0050] The sliding block 41 can slide along the first direction D1 and engage with the venting component 50. The pressing positioning component 30 can slide along the first direction D1 and engage with the sliding block 41. After the pressing positioning component 30 abuts against the workpiece to be welded, the pressing positioning component 30 first moves on the sliding block 41. At this time, the sliding block 41 remains stationary relative to the venting component 50. After the pressing positioning component 30 slides into place on the sliding block 41, the rough pressing is completed. At this time, the pressing positioning component 30 has initially fixed the workpiece to be welded on the product part, ensuring that the workpiece to be welded remains basically stable during the welding process, but the pressure has not yet reached the final fine pressing requirements.

[0051] The movement of the sliding block 41 is indirectly driven by the movement of the crimping positioning member 30. The sliding block 41 slides on the venting member 50 to begin fine crimping. During the fine crimping process, the crimping pressure can be accurately monitored by the pressure sensor 43. This accurate monitoring ensures that the crimping pressure is within a suitable range, avoiding damage or burn-through to the workpiece due to excessive pressure. The staged crimping method can effectively improve the accuracy and reliability of crimping.

[0052] The pressure sensor 43 is fixed to the vent 50. One end of the spring 42 is connected to the sliding block 41, and the other end of the spring 42 abuts against the pressure sensor 43. In the initial state, the spring 42 remains naturally extended. When the pressing and positioning part 30 applies pressure to the product, the sliding block 41 will move along the first direction D1 according to the magnitude of the pressure. The spring 42 is squeezed and deformed. The deformation of the spring 42 will be transmitted to the pressure sensor 43. The pressure sensor 43 realizes real-time monitoring of the pressure by detecting the degree of deformation of the spring 42.

[0053] In one feasible implementation, refer to Figure 3 as well as Figure 4 As shown, the pressure detection component 40 also includes a fixed bracket 44, which is detachably fixed to the venting component 50 to adjust its position as needed. The pressure sensor 43 is disposed on the bottom surface of the fixed bracket 44, the sliding block 41 is located below the fixed bracket 44, and the spring 42 is located between the sliding block 41 and the fixed bracket 44. The spring 42 extends along the direction of gravity, and the top end of the spring 42 abuts against the pressure sensor 43 to accurately detect the deformation of the spring 42. The bottom end of the spring 42 is connected to the sliding block 41.

[0054] When the crimping positioning member 30 applies pressure to the workpiece to be welded, the sliding block 41 moves along the direction of gravity according to the magnitude of the pressure. The spring 42 converts the movement of the sliding block 41 into elastic deformation and transmits this deformation to the pressure sensor 43, ensuring that the pressure is within a suitable range. The deformation of the spring 42 can be transmitted to the pressure sensor 43 in real time, allowing the pressure sensor 43 to dynamically monitor pressure changes. This allows for real-time adjustment of the crimping pressure, ensuring the stability and quality of the welding process.

[0055] A groove 45 is provided on the outer surface of the sliding block 41, and a slider 35 is provided on the pressing and positioning component 30. The slider 35 is slidably fitted on the groove 45. After the pressing and positioning component 30 contacts the workpiece to be welded, the slider 35 slides in the groove 45. The sliding block 41 remains stationary relative to the venting component 50. When the slider 35 slides to the end of the groove 45 and abuts against the inner wall of the groove 45, the pressure application component 20 continues to move downward, causing the sliding block 41 to slide on the venting component 50. The sliding block 41 and the venting component 50 are machined to a μ-level fit accuracy, thereby avoiding uneven pressure caused by uneven sliding and jamming.

[0056] Reference Figure 5 As shown, the crimping part 31 includes multiple walls 33, which together form a through groove 32. The walls 33 together form a square structure. The height of the walls 33 can be determined according to actual needs. The walls 33 together form the through groove 32, and the beam emitted by the laser source is confined within the walls 33, which can prevent the beam from directly interfering with the accessory. The walls 33 are preferably surface treated with copper plating process, which effectively avoids damage to the walls 33 caused by laser reflection and energy absorption, and improves the life of the crimping positioning part 30.

[0057] In the prior art, the copper busbar is the workpiece to be welded, and the entire welding area is located in a narrow (approximately 6mm × 5mm × 7mm) recessed position. The welding space is limited, so the wall thickness of the wall 33 is strictly controlled. In the embodiment provided by this utility model, the wall thickness of the wall 33 is 0.2-0.4mm, preferably 0.3mm. This thin-wall design is to ensure that the crimping part 31 can be smoothly installed and operated in the narrow welding area, while not affecting the laser's passability. It can reduce the obstruction of the laser and ensure that the laser can pass smoothly through the through groove 32 and directly act on the workpiece to be welded.

[0058] In one feasible implementation, refer to Figure 5 As shown, one of the wall bodies 33 has a pressing protrusion 34 at its bottom. The pressing protrusion 34 is positioned close to the accessories (such as fiberglass) on the product part to prevent the laser beam emitted from the laser source from affecting the accessories. The pressing protrusion 34 presses directly against the part to be welded. The other wall bodies 33 have a certain gap with the part to be welded. In this way, while protecting the accessories from direct laser irradiation, it can reduce interference with the laser welding process and will not cause too much obstruction to the laser welding process, ensuring the smooth progress of the welding process, which helps to improve the strength and uniformity of the welding and reduce welding defects.

[0059] Reference Figure 6As shown, the support component 10 includes a first tray 11 and a second tray 12. The first tray 11 is used to support the product component and is the part that directly contacts the product component, responsible for supporting and fixing the product component. The second tray 12 is the main body of the support component 10 and is used to support the first tray 11, providing a stable platform for the first tray 11 and ensuring that the product component remains stable during the welding process. The second tray 12 flows on the assembly line. When the product component reaches below the pressure member 20, the second tray 12 can be lifted, and the part to be welded on the product component abuts against the pressing and positioning member 30, pushing the pressing and positioning member 30 to slide a distance on the sliding block 41 to achieve coarse positioning. Then the pressure member 20 moves down, and the pressing and positioning member 30 is used to press the part to be welded onto the product component. During this period, the pressure sensor 43 monitors the pressure applied to the part to be welded by the pressing and positioning member 30 in real time.

[0060] The first tray 11 is detachably mounted on the second tray 12, allowing the first tray 11 to be replaced or adjusted according to different product parts. Different sizes or shapes of product parts can use different specifications of the first tray 11, while the second tray 12 can remain unchanged, improving the versatility and flexibility of the device and adapting to various welding scenarios.

[0061] Preferably, the second tray 12 is provided with a support column 13, which is used to cooperate with a preset part on the product component to support the product component on the second tray 12. The support column 13 can restrict the horizontal movement of the product component, achieving precise positioning and ensuring accurate positioning of the product component during the welding process, thereby improving the uniformity and strength of the weld. Furthermore, the height of the support column 13 itself can also ensure that the product component is at a certain height, allowing it to reach the height of the pressure member 20 more quickly during the ascent of the first tray 11, shortening the preparation time during the welding process and improving welding efficiency.

[0062] Furthermore, referring to Figure 1 As shown, to adjust the pressure applied to the workpiece by the pressure-applying component 20, the pressure-applying component 20 is connected to the height adjustment component 60. The height adjustment component 60 is used to adjust the distance between the pressure-applying component 20 and the workpiece in the first direction D1. In one feasible embodiment, the height adjustment component 60 is an adjusting bolt. The adjusting bolt passes through a preset hole on the pressure-applying component 20 and is threaded to the top of the machine platform. By tightening or loosening the adjusting bolt, the pressure-applying component 20 can be raised or lowered, adjusting its height and indirectly adjusting the pressure applied to the workpiece by the pressure-applying component 20. Operators can quickly adjust the pressure according to different welding requirements and the characteristics of the workpiece, improving the versatility and adaptability of the device.

[0063] Secondly, this utility model also provides a laser welding system, including a production line, a laser welding positioning device, and a laser source, wherein the laser welding positioning device is the aforementioned laser welding positioning device, wherein:

[0064] The support component 10 is installed on the production line and moves along a preset path. The preset path has a preset position. When the support component 10 supports the product and reaches the preset position, the support component 10 can reciprocate along the first direction D1. Specifically, the product is supported on the support column 13 of the second pallet 12. The second pallet 12 is detachably connected to the first pallet 11. The first pallet 11 follows the production line. When the first pallet 11 reaches the preset position, the first pallet 11 can be lifted a certain distance.

[0065] Both the pressure-applying component 20 and the laser source are located at preset positions. When the support component 10 reaches the preset position, the support component 10 is lifted a certain distance, the pressing and positioning component 30 slides on the sliding block 41, and the spring 42 remains in its initial state. After the support component 10 reaches the lifting position, the pressure-applying component 20 moves along the first direction D1, the sliding block 41 begins to slide on the venting component 50, the spring 42 is compressed, and the pressure sensor 43 begins to monitor the pressure applied by the pressing and positioning component 30 to the workpiece to be welded. After the pressing and positioning component 30 presses and positions the workpiece to be welded onto the product part, the light emitted by the laser source passes through the through groove 32 and reaches the welding point between the workpiece to be welded and the product part. Through precise pressing and positioning and the direct action of the laser beam, the accuracy and stability of the welding process are ensured.

[0066] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A laser welding positioning device for positioning a workpiece to be welded onto a product part, characterized in that, include: Support components, used to support product parts; The pressure-applying component can move closer to or further away from the support component along a first direction; A crimping positioning component is disposed on the pressure applying component. The crimping positioning component includes a crimping part, which is used to abut against the workpiece to be welded, so as to crimp and position the workpiece to be welded onto the product. The crimping part is provided with a through groove, which penetrates the crimping part along the first direction. A pressure testing element is used to detect the pressure applied by the crimping portion to the workpiece to be welded.

2. The laser welding positioning device according to claim 1, characterized in that: The positioning device is further provided with several venting components. The crimping positioning component is directly or indirectly connected to the venting components. The pressure applying component has a venting cavity. The venting component is located on the pressure applying component. A venting channel is provided through the venting component. The venting channel has a first end and a second end. The first end of the venting channel is connected to the venting cavity. The second end of the venting channel extends toward the crimping part and the crimping point of the workpiece to be welded.

3. The laser welding positioning device according to claim 2, characterized in that: The pressure detection element includes a sliding block, a spring, and a pressure sensor, wherein: The sliding block can be slidably fitted onto the venting component along the first direction, and the pressing and positioning component can be slidably fitted onto the sliding block along the first direction; The pressure sensor is fixed to the vent, one end of the spring is connected to the sliding block, and the other end of the spring abuts against the pressure sensor.

4. The laser welding positioning device according to claim 1, characterized in that: The crimping part includes multiple walls, which together form the through groove.

5. The laser welding positioning device according to claim 4, characterized in that: The wall thickness is 0.2-0.4 mm.

6. The laser welding positioning device according to claim 4, characterized in that: One of the wall sections has a pressing protrusion at its bottom.

7. The laser welding positioning device according to claim 1, characterized in that: The support includes a first tray and a second tray, wherein the first tray is detachably mounted on the second tray and is used to support the product.

8. The laser welding positioning device according to claim 7, characterized in that: The second tray is provided with a support column, which is used to cooperate with a preset part on the product to support the product on the second tray.

9. The laser welding positioning device according to claim 1, characterized in that: The pressure-applying component is connected to the height-adjusting component, which is used to adjust the distance between the pressure-applying component and the product component in the first direction.

10. A laser welding system, characterized in that, The system includes a production line, a laser welding positioning device, and a laser source, wherein the laser welding positioning device is the laser welding positioning device according to any one of claims 1-9, wherein: The support member is disposed on the production line. The support member moves along a preset path following the production line. The preset path has a preset position. When the support member supports the product and reaches the preset position, the support member can reciprocate along the first direction. Both the pressure-applying component and the laser source are located at the preset position. When the support component reaches the preset position, the pressure-applying component moves along the first direction, and the pressing and positioning component presses and positions the workpiece to be welded onto the product. The light emitted by the laser source passes through the through groove and reaches the welding point between the workpiece to be welded and the product.

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