An automatic spot welding system

Abstract

The application discloses an automatic spot welding system, which comprises a feeding platform, a first laser welding platform, a second laser welding platform, a discharging platform, two laser welding robot and a carrying robot; the feeding platform, the first laser welding platform, the second laser welding platform and the discharging platform are arranged in a ring shape in sequence, and the carrying robot is arranged at the middle part; one of the laser welding robots is arranged at the side of the first laser welding platform, and the other laser welding robot is arranged at the side of the second laser welding platform; the automatic spot welding of 0.05mm, 0.07mm and 0.1mm thick Al-Si-Mg series alloy foil can be realized, the positioning is accurate, and the welding efficiency is high; the carrying robot is matched with the first electromagnet through a lifting cylinder and a second visual positioning mechanism to realize the accurate carrying and rapid positioning of a clamp tool.

Description

Technical Field

[0001] This invention relates to the field of automatic welding technology, and more specifically to an automatic spot welding system. Background Technology

[0002] The manufacturing process of radar antennas requires spot welding of brazing filler metal. The currently used automatic spot welding system has initially achieved the elimination of manual labor and the upgrading to automation. However, due to the thinness of the Al-Si-Mg alloy foil, it is impossible to achieve precise positioning of the foil, resulting in low spot welding efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic spot welding system to address the shortcomings of existing technologies.

[0004] The technical solution of the present invention to solve the above problems is: an automatic spot welding system, including a feeding platform, a first laser welding platform, a second laser welding platform, an unloading platform, two laser welding robots and a handling robot; The loading platform, the first laser welding platform, the second laser welding platform, and the unloading platform are arranged in a ring. The handling robot is located in the middle, one laser welding robot is located on the side of the first laser welding platform, and the other laser welding robot is located on the side of the second laser welding platform. The product is fixed in place on the loading platform using fixtures and tooling, and its position is ensured by using positioning pins / corner positioning. The handling robot moves the product from the loading platform to the first laser welding platform and the second laser welding platform for spot welding. After welding is completed, the handling robot transfers the product to the unloading platform.

[0005] Furthermore, the first and second laser welding platforms are equipped with electromagnet worktables, which are energized when laser work is performed.

[0006] Furthermore, the laser welding robot includes a KR22 R1610 robotic arm and a laser spot welding mechanism connected to the moving end of the robotic arm.

[0007] Furthermore, the laser spot welding mechanism includes a first frame and a laser, a welding galvanometer, a first vision positioning mechanism, and a laser rangefinder fixedly connected to the first frame. A galvanometer dust cover is provided below the welding galvanometer.

[0008] Furthermore, the handling robot includes a KUKA KR50 R2500 robotic arm and a gripper mechanism connected to the movable end of the robotic arm.

[0009] Furthermore, the gripper mechanism includes a second frame, a second vision positioning mechanism, and two sets of gripper units. The second frame is fixedly connected to the movable end of the robotic arm. Each set of gripper units includes a first mounting plate, a material detection sensor, and a lifting cylinder. The first mounting plate is connected to the second frame via the lifting cylinder. The material detection sensor is fixedly connected to the first mounting plate. The second vision positioning mechanism is connected to one side of the second frame via a mounting bracket. First electromagnets are respectively provided at the four corners of the first mounting plate.

[0010] Furthermore, a plurality of guide rods are provided between the first mounting plate and the second mounting plate. One end of each guide rod is fixedly connected to the first mounting plate, and the other end is slidably connected to the second mounting plate. The second mounting plate is provided with a plurality of guide grooves through which the guide rods pass.

[0011] Furthermore, the fixture includes a base plate and a cover plate. The base plate has a placement groove in the middle, and the cover plate is placed in the placement groove. The four corners of the base plate are respectively provided with electromagnet attraction points, which are configured to cooperate with the first electromagnets at the four corners of the second mounting plate. The cover plate is a steel cover plate.

[0012] Furthermore, the two ends of the placement slot are equipped with foolproof slots.

[0013] Furthermore, the edge of the base plate is equipped with loading and unloading handles, positioning points, and mark points.

[0014] The present invention has the following beneficial effects: This invention provides an automatic spot welding system that can automatically spot weld Al-Si-Mg alloy foils with thicknesses of 0.05mm, 0.07mm, and 0.1mm, with accurate positioning and high welding efficiency; the handling robot uses a lifting cylinder, a second vision positioning mechanism, and a first electromagnet to achieve precise handling and rapid positioning of the fixture. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the laser spot welding mechanism; Figure 3 This is a schematic diagram of the gripper mechanism; Figure 4 This is a schematic diagram of the electromagnet worktable. Figure 5 This is a structural schematic diagram of the fixture. In the diagram: 1-Loading platform, 2-First laser welding platform, 3-Second laser welding platform, 4-Unloading platform, 5-Laser welding robot, 6-Handling robot, 7-Fixing fixture, 8-Electromagnetic workbench, 9-Laser spot welding mechanism, 10-First frame, 11-Welding galvanometer, 12-First vision positioning mechanism, 13-Laser rangefinder, 14-Galvanometer dust cover, 15-Gripper mechanism, 17-Second frame, 18-Material detection sensor, 19-Lifting cylinder, 20-First mounting plate, 22-Second vision positioning mechanism, 23-First electromagnet, 25-Base plate, 26-Cover plate, 27-Placement slot, 28-Electromagnet attraction point, 29-Anti-foolproof slot, 30-Loading / unloading handle, 31-Positioning point, 32-Mark point. Detailed Implementation

[0016] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0017] As shown in the figure, an automatic spot welding system includes a loading platform 1, a first laser welding platform 2, a second laser welding platform 3, an unloading platform 4, two laser welding robots 5, and a handling robot 6.

[0018] The loading platform 1, the first laser welding platform 2, the second laser welding platform 3, and the unloading platform 4 are arranged in a ring. The handling robot 6 is located in the middle to handle the products. One laser welding robot is located to the side of the first laser welding platform 2, and the other laser welding robot 5 is located to the side of the second laser welding platform 3.

[0019] The product is fixed in place on the loading platform 1 using the fixture 7, and its position is ensured by using positioning pins / corner positioning. The handling robot 6 moves the product on the loading platform 1 to the first laser welding platform 2 and the second laser welding platform 3 for spot welding. After welding is completed, the handling robot 6 transfers the product to the unloading platform 4.

[0020] The first laser welding platform 2 and the second laser welding platform 3 are equipped with an electromagnet worktable 8. During laser operation, the electromagnet worktable 8 is energized, which attracts and flattens the aluminum foil, achieving a tight fit between the aluminum foil to be welded and the product base plate 25. This ensures accurate positioning of the foil and improves spot welding efficiency.

[0021] The laser welding robot 5 includes a KR22 R1610 robotic arm and a laser spot welding mechanism 9 connected to the movable end of the robotic arm. The laser spot welding mechanism 9 includes a first frame 10 and a laser, a welding galvanometer 11, a first vision positioning mechanism 12, and a laser rangefinder 13 fixedly connected to the first frame 10. A galvanometer dust cover 14 is provided below the welding galvanometer 11. The laser selected is a YLPN-2-20x500-200-5M laser manufactured by IPG, which has a pulse intensity of not less than 1.5mJ and an average power of not less than 100W, and can meet the spot welding processing of aluminum-silicon-magnesium foil materials with thicknesses of 0.05mm, 0.07mm, and 0.1mm. The welding galvanometer 11 uses the SC-Ⅱ-RLZJ-15-330TZC-HP-01 type galvanometer manufactured by Rayleigh, which has a high welding speed and a high air jump speed, ensuring a short switching time at different weld point positions; it also has a large working area and a small focal plane error.

[0022] The handling robot 6 includes a KUKA KR50 R2500 robotic arm and a gripper mechanism 15 connected to the movable end of the robotic arm. The gripper mechanism 15 includes a second frame 17, a second vision positioning mechanism 22, and two sets of gripper units. The second frame 17 is fixedly connected to the movable end of the robotic arm. Each set of gripper units includes a first mounting plate 20, a material detection sensor 18, and a lifting cylinder 19. The first mounting plate 20 is connected to the second frame 17 through the lifting cylinder 19. The material detection sensor 18 is fixedly connected to the first mounting plate 20. The second vision positioning mechanism 22 is connected to one side of the second frame 17 through a mounting bracket. The four corners of the first mounting plate 20 are respectively provided with first electromagnets 23.

[0023] The fixture 7 includes a base plate 25 and a cover plate 26. The base plate 25 has a placement groove 27 in the middle, and the cover plate 26 is placed within the placement groove 27. The placement groove 27 has anti-foolproof slots 29 at both ends for the cover plate 26 to pick up materials. The base plate 25 has electromagnet attraction points 28 at its four corners, which cooperate with the first electromagnets 23 at the four corners of the second mounting plate. The edge of the base plate 25 has loading / unloading handles 30 and positioning points 31, and the cover plate 26 has marking points 32. The cover plate 26 is made of steel and, during product welding, can be tightly adhered to the various aluminum foils on the product under the magnetic force of the electromagnet on the electromagnet worktable 8 to meet the requirements of laser welding.

[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An automatic spot welding system, characterized in that: It includes a loading platform (1), a first laser welding platform (2), a second laser welding platform (3), a unloading platform (4), two laser welding robots (5), and a handling robot (6); The loading platform (1), the first laser welding platform (2), the second laser welding platform (3), and the unloading platform (4) are arranged in a ring. The handling robot (6) is located in the middle, with one laser welding robot located on the side of the first laser welding platform (2) and the other laser welding robot (5) located on the side of the second laser welding platform (3). The product is fixed in place on the loading platform (1) using a fixture (7) and its position is ensured by using positioning pins / corner positioning. The transport robot (6) transports the product on the loading platform (1) to the first laser welding platform (2) and the second laser welding platform (3) for spot welding. After welding is completed, the transport robot (6) transfers the product to the unloading platform (4).

2. The automatic spot welding system as described in claim 1, characterized in that: The first laser welding platform (2) and the second laser welding platform (3) are equipped with an electromagnet worktable (8). When laser work is performed, the electromagnet worktable (8) is powered on.

3. The automatic spot welding system as described in claim 1, characterized in that: The laser welding robot (5) includes a KR22R1610 robotic arm and a laser spot welding mechanism (9) connected to the movable end of the robotic arm.

4. An automatic spot welding system as described in claim 3, characterized in that: The laser spot welding mechanism (9) includes a first frame (10) and a laser, a welding galvanometer (11), a first visual positioning mechanism (12), and a laser rangefinder (13) fixedly connected to the first frame (10). A galvanometer dust cover (14) is provided below the welding galvanometer (11).

5. The automatic spot welding system as described in claim 1, characterized in that: The handling robot (6) includes a KUKAKR50 R2500 robotic arm and a gripper mechanism (15) connected to the movable end of the robotic arm.

6. An automatic spot welding system as described in claim 5, characterized in that: The gripper mechanism (15) includes a second frame (17), a second vision positioning mechanism (22), and two sets of gripper units. The second frame (17) is fixedly connected to the movable end of the robotic arm. Each set of gripper units includes a first mounting plate (20), a material detection sensor (18), and a lifting cylinder (19). The first mounting plate (20) is connected to the second frame (17) through the lifting cylinder (19). The material detection sensor (18) is fixedly connected to the first mounting plate (20). The second vision positioning mechanism (22) is connected to one side of the second frame (17) through a mounting bracket. The four corners of the first mounting plate (20) are respectively provided with first electromagnets (23).

7. An automatic spot welding system as described in claim 6, characterized in that: A plurality of guide rods are provided between the first mounting plate (20) and the second mounting plate. One end of the plurality of guide rods is fixedly connected to the first mounting plate (20), and the other end is slidably connected to the second mounting plate. The second mounting plate is provided with a plurality of guide grooves through which the guide rods pass.

8. An automatic spot welding system as described in claim 1, characterized in that: The fixture (7) includes a base plate (25) and a cover plate (26). The base plate (25) has a placement groove (27) in the middle and the cover plate (26) is placed in the placement groove (27). The four corners of the base plate (25) are respectively provided with electromagnet attraction points (28), which are matched with the first electromagnets (23) at the four corners of the second mounting plate. The cover plate (26) is a steel cover plate (26).

9. An automatic spot welding system as described in claim 8, characterized in that: The two ends of the placement slot (27) are provided with anti-foolproof slots (29).

10. An automatic spot welding system as described in claim 8, characterized in that: The bottom plate (25) is provided with loading and unloading handles (30) and positioning points (31) on its edge, and the cover plate (26) is provided with Mark points (32).

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