Laser welding equipment for water inlet and outlet joints of heating body

Abstract

The laser welding equipment for the water inlet and outlet connector of the heating body comprises a workbench, a three-axis moving mechanism and a clamp device are installed on the workbench, the clamp device comprises a welding executing mechanism and a pre-placing positioning mechanism, and a laser head is installed on the three-axis moving mechanism; the welding executing mechanism comprises a rotary clamping assembly, a sliding table air cylinder, a displacement air cylinder and a displacement platform, the displacement platform is arranged on the workbench through the displacement air cylinder, the rotary clamping assembly is arranged on the displacement platform through the sliding table air cylinder, the displacement platform is provided with a first station and a second station, and when the first station is located, the displacement platform is matched with the pre-placing positioning mechanism; when the sliding table air cylinder drives the rotary clamping assembly to move and clamp the water inlet and outlet connector and the second station, the displacement platform inclines upwards, the water inlet and outlet connector inclines upwards and avoids an electric heating wire, the three-axis moving mechanism drives the laser head to move, the laser head is matched with the water inlet and outlet connector, the rotary clamping assembly rotates to achieve annular welding, and the welding efficiency and quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding equipment, and particularly relates to a laser welding equipment for the water inlet and outlet joints of a heating element. Background Art

[0002] In a water dispenser, the heating element plays a crucial role. It is responsible for heating water to the boiling state. Usually, a water inlet joint and a water outlet joint are welded to the heating element. However, due to the special structure of the heating element, it is difficult to weld the water inlet joint and the water outlet joint. Usually, the structure of the heating element 6 is as Figure 1 shown, including a water inlet joint 61, a water outlet joint 62, and a heating wire 64. The heating wire 64 converts electrical energy into heat energy to quickly heat the water. The distance between the heating wire 64 and the water inlet joint 61 and the water outlet joint 62 is very close. During the welding operation, it is necessary to avoid the heating wire 64 to prevent damage to the heating wire 64. However, due to the overly close distance between the heating wire 64 and the water inlet joint 61 and the water outlet joint 62, it is difficult to avoid the heating wire 64 during the welding operation. Conventional welding equipment is difficult to weld. Conventional welding equipment on the market is usually designed for standard parts, while the heating element is a non-standard part. In actual operation, it is very difficult to avoid the heating wire 64, and mistakes are likely to occur during welding. This not only affects the welding efficiency but also may pose a threat to the safety of the equipment. Therefore, in order to improve the welding efficiency and quality, it is necessary to design a welding equipment suitable for welding the water inlet and outlet joints of the heating element. Summary of the Invention

[0003] The purpose of the present invention is to provide a laser welding equipment for the water inlet and outlet joints of a heating element in view of the defects and deficiencies of the prior art. The structure is simple and reasonable, and the operation is convenient. The sliding table cylinder is used to drive the rotating clamping assembly to move to pick up and place the heating element. During the welding operation, the positioning cylinder is used to drive the positioning platform to rotate to ensure that the heating element has the best posture and angle, which can better cooperate with the positioning and pressing device and avoid the interference of the heating wire. The laser head moves to the welding area between the water inlet and outlet joints and the heating element, and the rotating clamping assembly controls the rotation of the heating element to achieve circular welding, improving the welding efficiency and quality.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A laser welding device for the water inlet and outlet joints of a heating element shown in the present invention includes a workbench, on which a three-axis moving mechanism and a fixture device are installed. The fixture device includes a welding execution mechanism and a pre-placement positioning mechanism for placing the heating element. A laser head is installed on the three-axis moving mechanism. The welding execution mechanism includes a rotating clamping assembly, a slide cylinder, a displacement cylinder, and a displacement platform. The displacement platform is rotatably arranged on the workbench through the displacement cylinder. The rotating clamping assembly is slidably arranged on the displacement platform through the slide cylinder. The displacement platform has a first working position and a second working position. When the displacement platform is at the first working position, the displacement platform cooperates with the pre-placement positioning mechanism, and the slide cylinder drives the rotating clamping assembly to move, so that the clamping jaws clamp the water inlet and outlet joints of the heating element placed on the pre-placement positioning mechanism. When the displacement cylinder drives the displacement platform to rotate to the second working position, the displacement platform and the rotating clamping assembly are arranged obliquely upward, driving the water inlet and outlet joints of the clamped heating element to be arranged obliquely upward. The three-axis moving mechanism is used to drive the laser head to move relative to the workbench, so that the laser head cooperates with the water inlet and outlet joints, and the rotating clamping assembly drives the water inlet and outlet joints to rotate to achieve circular welding.

[0005] Further, the three-axis moving mechanism includes an X-axis slide, a Y-axis slide, a Z-axis slide, a first driving module, a second driving module, and a third driving module. The Y-axis slide is slidably connected to the X-axis slide and can move along the X-axis direction. The first driving module is used to drive the Y-axis slide to move relative to the X-axis slide. The Z-axis slide is slidably connected to the Y-axis slide and can move along the Y-axis direction. The second driving module is used to drive the Z-axis slide to move relative to the Y-axis slide. The laser head is slidably connected to the Z-axis slide and can move along the Z-axis direction. The third driving module is used to drive the laser head to move relative to the Z-axis slide.

[0006] Further, a laser bracket is connected between the Z-axis slide and the laser head, and the laser bracket is perpendicular to the Z-axis slide.

[0007] Further, an outer frame is installed on the workbench, and the three-axis moving mechanism and the fixture device are arranged inside the outer frame.

[0008] Furthermore, the clamping device also includes a positioning and clamping device, and a mounting frame is also installed on the workbench. A displacement cylinder and a displacement platform are movably provided on one side of the mounting frame, and the displacement cylinder is movably connected to the mounting frame. A positioning and clamping device and a pre-positioning mechanism are provided on the other side of the mounting frame. The positioning and clamping device is located above the pre-positioning mechanism, and the positioning and clamping device is inclined downward. When the positioning and clamping device is working, the displacement platform is located in the second station, and the plane where the displacement platform is located is parallel to the installation plane of the positioning and clamping device. When the rotating clamping assembly takes and places the heating element on the pre-positioning mechanism, the displacement platform rotates to the first station, and the plane where the displacement platform is located is parallel to the installation plane of the pre-positioning mechanism.

[0009] Furthermore, the positioning and clamping device includes a clamping cylinder and a positioning pressure block. The output end of the clamping cylinder is connected to the positioning pressure block, which is used to clamp the inlet and outlet water joints onto the heating element. The positioning pressure block is provided with a groove, and the inner wall of the groove is adapted to the outer wall of the heating element.

[0010] Furthermore, the pre-positioning mechanism comprises a pre-positioning profiling body, on which a receiving groove matching the heating element and a plurality of positioning grooves for positioning the inlet and outlet water joints are arranged, and the positioning grooves are all connected with the receiving groove.

[0011] Furthermore, the rotary clamping assembly includes a rotary mechanism and a clamping air claw, the output end of the rotary mechanism is connected to the clamping air claw to drive the clamping air claw to rotate, and the clamping air claw is used to clamp the water inlet and outlet joints on the heating element.

[0012] Furthermore, the rotating mechanism includes a servo motor, a reducer, a coupling and a rotating shaft. The output end of the servo motor is transmission-connected to the reducer. One end of the rotating shaft is connected to the output end of the reducer through a coupling to drive the rotating shaft to rotate along its axis. The other end of the rotating shaft is connected to the clamping air claw.

[0013] Furthermore, the clamp device is provided in two groups, and the two groups of the clamp devices are arranged side by side.

[0014] The beneficial effects of the present invention are as follows: For a laser welding device for the water inlet and outlet joints of a heating element according to the present invention, a three-axis moving mechanism is provided to drive the laser head to move relative to the workbench in the X-axis direction, Y-axis direction, and Z-axis direction. The laser head has a high degree of freedom and can adapt to complex working scenarios. A positioning and pressing device is provided to press the water inlet and outlet joint onto the heating element. Before welding, the water inlet and outlet joint is pressed to an accurate position, effectively avoiding the problem of low welding accuracy due to position deviation during welding. A welding execution mechanism is also provided, including a rotating clamping assembly, a slide cylinder, a displacement cylinder, and a displacement platform. The slide cylinder is used to drive the rotating clamping assembly to move to pick up and place the heating element placed on the pre-placement positioning mechanism. The displacement cylinder is used to drive the displacement platform to rotate. By controlling the rotation of the displacement platform, it is ensured that the heating element has an optimal posture and angle, which can better cooperate with the positioning and pressing device and ensure that the heating wire can be well avoided during welding, avoiding potential safety hazards or welding quality problems caused by contacting the heating wire. During welding, the laser head moves to the welding area between the water inlet and outlet joint and the heating element, and the laser head emits a laser beam. The rotating clamping assembly controls the rotation of the heating element to achieve circular welding, improving the welding efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the present invention with the outer frame hidden from the first perspective; Figure 3 is the structural schematic diagram of the present invention with the outer frame hidden from the second perspective; Figure 4 is the structural schematic diagram of the fixture device in the present invention from the third perspective; Figure 5 is the structural schematic diagram of the fixture device in the present invention from the fourth perspective; Figure 6 is the sectional structural schematic diagram of the fixture device in the present invention; Figure 7 is Figure 6 the enlarged structural schematic diagram of part A in; Figure 8 is Figure 6 the enlarged structural schematic diagram of part B in; Figure 9 is the structural schematic diagram of the heating element; Figures 1 - 9Chinese: 1. Workbench; 11. Outer frame; 12. Mounting frame; 13. Support feet; 2. Three-axis moving mechanism; 21. X-axis slide; 211. First slide rail; 22. Y-axis slide; 221. Second slide rail; 23. Z-axis slide; 231. Third slide rail; 232. Laser bracket; 2321. Laser head; 3. Welding actuator; 31. Rotary clamping assembly; 311. Servo motor; 312. Reducer; 313. Coupling; 314. Rotary shaft; 315. Gas-electric slip ring; 316. Clamping air gripper; 32. Slide cylinder; 33. Positioning cylinder; 34. Positioning platform; 4. Pre-positioning imitation body; 41. Accommodation groove; 42. Positioning groove; 5. Positioning and pressing device; 51. Pressing cylinder; 52. Positioning press block; 521. Groove; 6. Heating element; 61. Water inlet joint; 62. Water outlet joint; 63. Spiral water pipe; 64. Electric heating wire. Detailed implementation mode

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] As Figures 1 - 8 shown, a laser welding device for the water inlet and outlet joints of a heating element, including a workbench 1, refer to Figure 1 , an outer frame 11 is installed on the workbench 1, and the outer frame 11 can be used to fix and support various tools or equipment. A three-axis moving mechanism 2 and a fixture device are arranged inside the outer frame 11. The fixture device includes a welding actuator 3 and a pre-positioning mechanism for placing the heating element 6. Refer to Figure 1 , a laser head 2321 is installed on the three-axis moving mechanism 2. The three-axis moving mechanism 2 is used to drive the laser head 2321 to move relative to the workbench 1 in the X-axis direction, Y-axis direction, and Z-axis direction. The laser head 2321 has a high degree of freedom and can adapt to complex working scenarios. Specifically, in the present invention, the X-axis direction is horizontal and transverse, the Y-axis direction is horizontal and longitudinal, and the Z-axis direction is vertical. Refer to Figure 1, the welding execution mechanism 3 includes a rotary clamping assembly 31, a slide table cylinder 32, a slewing cylinder 33 and a slewing platform 34. The rotary clamping assembly 31 is slidably arranged on the slewing platform 34 through the slide table cylinder 32. The slide table cylinder 32 is used to drive the rotary clamping assembly 31 to move to pick up and place the heating element 6 placed on the pre-placement positioning mechanism. The slewing platform 34 is rotatably arranged on the workbench 1 through the slewing cylinder 33. The output end of the slewing cylinder 33 is connected to the slewing platform 34. The slewing cylinder 33 is used to drive the slewing platform 34 to rotate. The slewing platform 34 has a first working position and a second working position. When the slewing platform 34 is in the first working position, the slewing platform 34 cooperates with the pre-placement positioning mechanism. The slide table cylinder 32 drives the rotary clamping assembly 31 to move, so that the clamping jaws 316 clamp the water inlet and outlet joints of the heating element 6 placed on the pre-placement positioning mechanism. When the slewing cylinder 33 drives the slewing platform 34 to rotate to the second working position, the slewing platform 34 and the rotary clamping assembly 31 are arranged obliquely upward, driving the water inlet and outlet joints of the clamped heating element 6 to be arranged obliquely upward. The three-axis moving mechanism 2 is used to drive the laser head 2321 to move relative to the workbench 1, so that the laser head 2321 cooperates with the water inlet and outlet joints. The rotary clamping assembly 31 drives the water inlet and outlet joints to rotate to realize circular welding.

[0018] The fixture device of the present invention further includes a positioning and pressing device 5. An installation frame 12 is further installed on the workbench 1. A slewing cylinder 33 and a slewing platform 34 are movably arranged on one side of the installation frame 12. The slewing cylinder 33 is movably connected to the installation frame 12. A positioning and pressing device 5 and a pre-placement positioning mechanism are arranged on the other side of the installation frame 12. The positioning and pressing device 5 is located above the pre-placement positioning mechanism. The positioning and pressing device 5 is arranged obliquely downward. When the positioning and pressing device 5 works, the slewing platform 34 is in the second working position, and the plane where the slewing platform 34 is located is parallel to the installation plane of the positioning and pressing device 5. When the rotary clamping assembly 31 picks up and places the heating element 6 on the pre-placement positioning mechanism, the slewing platform 34 rotates to the first working position, and the plane where the slewing platform 34 is located is parallel to the installation plane of the pre-placement positioning mechanism.

[0019] Specifically, the slewing cylinder 33 is located below the slewing platform 34. The output end of the slewing cylinder 33 is connected to one end of the slewing platform 34 close to the clamping jaws 316. The other end of the slewing cylinder 33 is hinged to the installation frame 12 to ensure stable and reliable connection. One end of the slewing platform 34 can realize the functions of lifting and lowering through the slewing cylinder 33, so that the slewing platform 34 can be switched between the first working position and the second working position.

[0020] The positioning and clamping device 5 is used to press the inlet and outlet water joints onto the heating element 6. Before welding, the inlet and outlet water joints are pressed to the accurate position, which can effectively avoid the problem of low welding accuracy due to position deviation during welding. Specifically, the inlet and outlet water joints include an inlet joint 61 and an outlet joint 62. During welding, the laser head 2321 moves to the welding area between the inlet and outlet water joints and the heating element 6, and the laser head 2321 emits a laser beam. The rotating clamping assembly 31 controls the rotation of the heating element 6 to achieve annular welding.

[0021] Preferably, in this embodiment, refer to Figures 3 - 4 The positioning and clamping device 5 is arranged to be tilted downward. When the positioning and clamping device 5 is working, the displacement platform 34 rotates to the second position to ensure that the heating element 6 has the best posture and angle, can better cooperate with the positioning and clamping device 5, and ensure that the electric heating wire 64 can be well avoided during welding, avoiding safety hazards or welding quality problems caused by contact with the electric heating wire 64. In addition, the heating element 6 is lifted to a certain angle by the displacement platform 34 and welded in an oblique welding manner, which can effectively avoid the risk of the water inlet joint 61 or the water outlet joint 62 falling from the heating element 6, and can also ensure that the laser beam can It can accurately irradiate the welding part, so as to complete the welding work smoothly. Specifically, before welding, the water inlet joint 61 and the water outlet joint 62 are still in a loose fit with the heating element 6. If the heating element 6 is placed horizontally for welding, the water inlet joint 61 or the water outlet joint 62 may fall off the heating element 6, resulting in welding failure; and if the heating element 6 is placed vertically, there will be a new problem, that is, the laser cannot accurately contact the part to be welded, and welding is more difficult. Therefore, after being clamped by the positioning clamping device 5, the oblique welding method can be used to complete the welding work more smoothly.

[0022] Preferably, see Figure 1 The bottom of the workbench 1 is also provided with supporting feet 13 around it, which can prevent the workbench 1 from directly contacting the ground and prevent the wear of the bottom of the workbench 1.

[0023] Preferably, in this embodiment, refer to Figure 2The three-axis moving mechanism 2 includes an X-axis slide 21, a Y-axis slide 22, a Z-axis slide 23, a first driving module, a second driving module and a third driving module. The Y-axis slide 22 is slidably connected to the X-axis slide 21 so that the Y-axis slide 22 can move along the X-axis direction. The X-axis slide 21 is provided with a first slide rail 211. The Y-axis slide 22 is slidably connected to the X-axis slide 21 through the first slide rail 211. The first driving module is used to drive the Y-axis slide 22 to move relative to the X-axis slide 21. The Z-axis slide 23 is slidably connected to the Y-axis slide 22 so that the Z-axis slide 23 can move along the Y-axis The Y-axis slide 22 is provided with a second slide rail 221, and the Z-axis slide 23 is slidably connected to the Y-axis slide 22 through the second slide rail 221. The second driving module is used to drive the Z-axis slide 23 to move relative to the Y-axis slide 22. The laser head 2321 is slidably connected to the Z-axis slide 23 and allows the laser head 2321 to move along the Z-axis direction. The Z-axis slide 23 is provided with a third slide rail 231, and the laser head 2321 is slidably connected to the Z-axis slide 23 through the third slide rail 231. The third driving module is used to drive the laser head 2321 to move relative to the Z-axis slide 23. The first drive module, the second drive module and the third drive module (the first drive module, the second drive module and the third drive module are not shown in the figure) all adopt linear drive devices well known in the art. Specifically, the linear drive device refers to a drive device that can generate linear motion. The linear drive device described in the present invention is a prior art and will not be described in detail here. For example, a ball screw transmission method can be adopted, that is, the motor and the ball screw cooperate to convert the rotational motion of the motor into linear motion. Of course, linear motion can also be achieved by direct drive of a linear motor.

[0024] Preferably, in this embodiment, refer to Figure 2 A laser bracket 232 is connected between the Z-axis slide 23 and the laser head 2321. The laser bracket 232 is used to install the laser head 2321, making the connection more stable and firm. The laser bracket 232 is vertically arranged with the Z-axis slide 23. Specifically, the axis of the laser head 2321 is vertically arranged with the workbench 1. When calibrating the optical path, the vertical axis is easier to align, which facilitates the calibration and positioning of the laser head 2321.

[0025] See also Figures 5 - 6 When the rotating clamping assembly 31 picks up and places the heating element 6 on the pre-positioning mechanism, the displacement platform 34 rotates to the first station to ensure that the rotating clamping assembly 31 has the best posture and angle when performing the picking or placing task, thereby ensuring the stability and safety of the heating element 6 during the picking and placing process.

[0026] Preferably, in this embodiment, refer to Figure 4The positioning and clamping device 5 includes a clamping cylinder 51 and a positioning block 52. The output end of the clamping cylinder 51 is connected to the positioning block 52. The positioning block 52 is used to clamp the inlet and outlet water joints onto the heating element 6. The positioning block 52 is provided with a groove 521. The inner wall of the groove 521 is adapted to the outer wall of the heating element 6, so that the positioning block 52 can better apply force to the heating element 6.

[0027] Preferably, in this embodiment, refer to Figure 4 The pre-positioning mechanism includes a pre-positioning profiling body 4, on which a receiving groove 41 matching with the heating element 6 and a plurality of positioning grooves 42 for positioning the water inlet and outlet joints are arranged, and the positioning grooves 42 are all connected with the receiving groove 41, and the heating element 6 is pre-placed in the receiving groove 41, see Figure 9 Two spiral water pipes 63 are provided on the heating element 6, and the positioning groove 42 cooperates with the spiral water pipe 63. Specifically, in this embodiment, two positioning grooves 42 are provided, and each spiral water pipe 63 extends out of the corresponding positioning groove 42. The protruding ends of the two spiral water pipes 63 are respectively provided with a water inlet joint 61 and a water outlet joint 62. The spiral water pipe 63 is positioned in the positioning groove 42, so that the water inlet joint 61 or the water outlet joint 62 is positioned at a preset position.

[0028] Preferably, in this embodiment, refer to Figure 4 At least part of the inner wall of the receiving groove 41 is provided with a straight wall for positioning, so that the heating element 6 can be more easily positioned in the receiving groove 41 and is not prone to unexpected displacement.

[0029] Preferably, in this embodiment, refer to Figures 6 - 8 , the rotating clamping assembly 31 includes a rotating mechanism and a clamping claw 316, the output end of the rotating mechanism is connected to the clamping claw 316 to drive the clamping claw 316 to rotate, and the clamping claw 316 is used to clamp the inlet and outlet water joints on the heating element 6. Preferably, in this embodiment, the rotating mechanism includes a servo motor 311, a reducer 312, a coupling 313 and a rotating shaft 314, the output end of the servo motor 311 is transmission-connected to the reducer 312, one end of the rotating shaft 314 is connected to the output end of the reducer 312 through the coupling 313 to drive the rotating shaft 314 to rotate along its axis, the coupling 313 can ensure the stable and reliable connection between the rotating shaft 314 and the reducer 312 and transmit the rotational motion, the other end of the rotating shaft 314 is connected to the clamping claw 316, and the rotation of the rotating shaft 314 drives the clamping claw 316 to rotate synchronously.

[0030] Preferably, in this embodiment, refer to Figure 8, the rotary clamping assembly 31 further includes an air-electric slip ring 315. The air-electric slip ring 315 includes a stator and a rotor. The rotor cooperates with the stator and can rotate relative to the stator. The air-electric slip ring 315 is connected between the coupling 313 and the clamping air claw 316. The rotating shaft 314 axially passes through the air-electric slip ring 315. The air-electric slip ring 315 is used to transmit gas and electricity to ensure the normal operation of the rotary clamping assembly 31. The air-electric slip ring 315 is a prior art and will not be described in detail here. Specifically, the servo motor 311 drives the speed reducer 312 to drive the coupling 313, the rotor of the air-electric slip ring 315, the rotating shaft 314, and the clamping air claw 316 to rotate.

[0031] Preferably, in this embodiment, refer to Figure 1 , two sets of the fixture devices are provided, and the two sets of the fixture devices are arranged side by side. The double-station design can greatly improve the working efficiency.

[0032] Preferably, in this embodiment, refer to Figure 1 , in each set of fixture devices, two sets of the rotary clamping assemblies 31 are provided. Each set of the rotary clamping assemblies 31 is installed on the corresponding indexing platform 34 through the corresponding sliding table cylinder 32. Specifically, the two sets of the rotary clamping assemblies 31 are arranged side by side. The first set of the rotary clamping assemblies 31 is used to clamp the water inlet joint 61, and the second set of the rotary clamping assemblies 31 is used to clamp the water outlet joint 62.

[0033] The working principle of the present invention is as follows: The heating element 6 is placed in the accommodating groove 41 of the pre-positioning imitation body 4. The two spiral water pipes 63 on the heating element 6 respectively extend out of the accommodating groove 41. The water inlet joint 61 and the water outlet joint 62 are respectively sleeved on the extending ends of the two spiral water pipes 63. Two sets of the rotary clamping assemblies 31 are provided. Each set of the rotary clamping assemblies 31 is installed on the corresponding indexing platform 34 through the corresponding sliding table cylinder 32. In the initial state, the indexing platform 34 is located at the first station, and the two sets of the rotary clamping assemblies 31 are arranged side by side. After the water inlet joint 61 and the water outlet joint 62 are sleeved, the two sets of the rotary clamping assemblies 31 synchronously move forward through the sliding table cylinder 32, and the clamping air claw 316 of the first set of the rotary clamping assemblies 31 clamps the water inlet joint 61, and the clamping air claw 316 of the second set of the rotary clamping assemblies 31 clamps the water outlet joint 62. After the water inlet joint 61 and the water outlet joint 62 are clamped, the indexing cylinder 33 works to control the indexing platform 34 to lift to the second station so that the heating element 6 corresponds to and cooperates with the positioning and pressing device 5. Subsequently, the positioning and pressing device 5 works to control the positioning press block 52 to extend and act on the heating element 6 to press and position the water inlet joint 61 and the water outlet joint 62 on the heating element 6; After pressing, the three-axis moving mechanism 2 drives the laser head 2321 to move to the seams between the water inlet joint 61 and the outer wall of the spiral water pipe 63 and between the water outlet joint 62 and the outer wall of the spiral water pipe 63 for spot welding to complete the basic fixation before welding; After the spot welding is completed, the positioning pressing block 52 is retracted; the clamping jaw 316 of the second group of rotary clamping assemblies 31 is controlled to release the water outlet joint 62, and the second group of rotary clamping assemblies 31 is retracted through the corresponding slide cylinder 32; The three-axis moving mechanism 2 drives the laser head 2321 to move to the welding area to be welded between the water inlet joint 61 and the heating element 6. The laser head 2321 emits a laser beam. The rotating mechanism of the first group of rotary clamping assemblies 31 operates to drive the clamping jaw 316 to rotate, thereby driving the water inlet joint 61 to rotate so that the water inlet joint 61 can be subjected to circular laser welding; After the circular welding of the water inlet joint 61, the second group of rotary clamping assemblies 31 moves forward again through the slide cylinder 32, and the clamping jaw 316 of the second group of rotary clamping assemblies 31 clamps the water outlet joint 62. Subsequently, the positioning and pressing device 5 operates to control the positioning pressing block 52 to extend and act on the heating element 6 again to press and position the water inlet joint 61 and the water outlet joint 62 on the heating element 6; After pressing, the positioning pressing block 52 is retracted; the clamping jaw 316 of the first group of rotary clamping assemblies 31 is controlled to release the water inlet joint 61, and the first group of rotary clamping assemblies 31 is retracted through the slide cylinder 32; The three-axis moving mechanism 2 drives the laser head 2321 to move to the welding area to be welded between the water outlet joint 62 and the heating element 6. The laser head 2321 emits a laser beam. The rotating mechanism of the second group of rotary clamping assemblies 31 operates to drive the clamping jaw 316 to rotate, thereby driving the water outlet joint 62 to rotate so that the water outlet joint 62 can be subjected to circular laser welding; After both the water outlet joint 62 and the water inlet joint 61 are welded, the first group of rotary clamping assemblies 31 moves forward through the corresponding slide cylinder 32, and the clamping jaw 316 of the first group of rotary clamping assemblies 31 clamps the water inlet joint 61. The displacement cylinder 33 is retracted, and the displacement platform 34 is controlled to return to the first station; After resetting, the clamping jaws 316 of the two groups of rotary clamping assemblies 31 are all released, the two groups of rotary clamping assemblies 31 are both retracted through the slide cylinder 32, and the heating element 6 is placed back on the pre-positioning phantom 4.

[0034] The above is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made according to the structures, features, and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. A laser welding device for the water inlet and outlet joints of a heating element, characterized in that: It includes a workbench (1), on which a three-axis moving mechanism (2) and a fixture device are installed. The fixture device includes a welding execution mechanism (3) and a pre-placement positioning mechanism for placing a heating element (6). A laser head (2321) is installed on the three-axis moving mechanism (2). The welding execution mechanism (3) includes a rotating clamping assembly (31), a slide table cylinder (32), a slewing cylinder (33), and a slewing platform (34). The slewing platform (34) is rotatably arranged on the workbench (1) through the slewing cylinder (33). The rotating clamping assembly (31) is slidably arranged on the slewing platform (34) through the slide table cylinder (32). The slewing platform (34) has a first station and a second station. When the slewing platform (34) is at the first station, the slewing platform (34) cooperates with the pre-placement positioning mechanism, and the slide table cylinder (32) drives the rotating clamping assembly (31) to move, so that the clamping jaws (316) clamp the water inlet and outlet joints of the heating element (6) placed on the pre-placement positioning mechanism. When the slewing cylinder (33) drives the slewing platform (34) to rotate to the second station, the slewing platform (34) and the rotating clamping assembly (31) are arranged obliquely upward, driving the water inlet and outlet joints of the clamped heating element (6) to be arranged obliquely upward. The three-axis moving mechanism (2) is used to drive the laser head (2321) to move relative to the workbench (1) so that the laser head (2321) cooperates with the water inlet and outlet joints, and the rotating clamping assembly (31) drives the water inlet and outlet joints to rotate to achieve circular welding.

2. The laser welding device for the water inlet / outlet joint of the heating element according to claim 1, characterized in that: The three-axis moving mechanism (2) includes an X-axis slide (21), a Y-axis slide (22), a Z-axis slide (23), a first driving module, a second driving module, and a third driving module. The Y-axis slide (22) is slidably connected to the X-axis slide (21) and can move along the X-axis direction. The first driving module is used to drive the Y-axis slide (22) to move relative to the X-axis slide (21). The Z-axis slide (23) is slidably connected to the Y-axis slide (22) and can move along the Y-axis direction. The second driving module is used to drive the Z-axis slide (23) to move relative to the Y-axis slide (22). The laser head (2321) is slidably connected to the Z-axis slide (23) and can move along the Z-axis direction. The third driving module is used to drive the laser head (2321) to move relative to the Z-axis slide (23).

3. A laser welding device for the inlet and outlet joints of a heating element, according to claim 2, characterized in that: A laser bracket (232) is connected between the Z-axis slide (23) and the laser head (2321), and the laser bracket (232) is perpendicular to the Z-axis slide (23).

4. A laser welding device for the water inlet and outlet joints of a heating element, according to claim 1, characterized in that: An outer frame (11) is installed on the workbench (1), and the three-axis moving mechanism (2) and the fixture device are arranged inside the outer frame (11).

5. The laser welding device for the water inlet and outlet joints of a heating element according to claim 1, characterized in that: The clamping device also includes a positioning and clamping device (5). A mounting frame (12) is also installed on the workbench (1). A displacement cylinder (33) and a displacement platform (34) are movably provided on one side of the mounting frame (12). The displacement cylinder (33) is movably connected to the mounting frame (12). A positioning and clamping device (5) and a pre-positioning mechanism are provided on the other side of the mounting frame (12). The positioning and clamping device (5) is located above the pre-positioning mechanism. The positioning and clamping device (5) is arranged to be inclined downward. When the positioning and clamping device (5) is working, the displacement platform (34) is located at the second working position, and the plane where the displacement platform (34) is located is parallel to the installation plane of the positioning and clamping device (5). When the rotating clamping assembly (31) takes or places the heating element (6) on the pre-positioning mechanism, the displacement platform (34) rotates to the first working position, and the plane where the displacement platform (34) is located is parallel to the installation plane of the pre-positioning mechanism.

6. The laser welding device for the water inlet / outlet joint of the heating element according to claim 5, characterized in that: The positioning and pressing device (5) comprises a pressing cylinder (51) and a positioning pressing block (52); the output end of the pressing cylinder (51) is connected to the positioning pressing block (52); the positioning pressing block (52) is used to press the inlet and outlet water joints onto the heating element (6); the positioning pressing block (52) is provided with a groove (521); the inner wall of the groove (521) is adapted to fit the outer wall of the heating element (6).

7. A laser welding device for the water inlet and outlet joints of a heating element, according to claim 1, characterized in that: The pre-positioning mechanism comprises a pre-positioning contoured body (4), the pre-positioning contoured body (4) being provided with a receiving groove (41) matching with the heating element (6) and a plurality of positioning grooves (42) for positioning the inlet and outlet water joints, the positioning grooves (42) being in communication with the receiving grooves (41).

8. A laser welding device for the water inlet and outlet joints of a heating element, according to claim 1, characterized in that: The rotary clamping assembly (31) comprises a rotary mechanism and a clamping air claw (316); the output end of the rotary mechanism is connected to the clamping air claw (316) to drive the clamping air claw (316) to rotate; the clamping air claw (316) is used to clamp the water inlet and outlet joints on the heating element (6).

9. The laser welding equipment for the water inlet / outlet joint of the heating element according to claim 8, characterized in that: The rotating mechanism comprises a servo motor (311), a reducer (312), a coupling (313) and a rotating shaft (314); the output end of the servo motor (311) is drivingly connected to the reducer (312); one end of the rotating shaft (314) is connected to the output end of the reducer (312) via the coupling (313) to drive the rotating shaft (314) to rotate along its axis; the other end of the rotating shaft (314) is connected to a clamping air claw (316).

10. A laser welding device for the water inlet / outlet joint of a heating element according to claim 1, characterized in that: The clamp device is provided with two groups, and the two groups of the clamp devices are arranged side by side.

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