Clamp mechanism of laser welding equipment for water inlet and outlet joints of heating body

Abstract

The utility model discloses a fixture mechanism of laser welding equipment for a water inlet and outlet joint of a heating element, which comprises a mounting rack, a rotary clamping device, a sliding table cylinder and a displacement cylinder, one side of the mounting rack is movably connected with a displacement platform through the displacement cylinder, and the other side of the mounting rack is fixedly provided with a pre-positioning profiling body; the rotary clamping device is installed on the displacement platform through a sliding table air cylinder and comprises a rotating mechanism and a clamping pneumatic claw, the output end of the rotating mechanism is connected with the clamping pneumatic claw, the displacement platform is provided with a first station and a second station, when the displacement platform is located at the first station, the displacement platform is matched with the pre-positioning profiling body, and when the displacement platform is located at the second station, the pre-positioning profiling body is located at the third station. The sliding table air cylinder drives the rotary clamping device to move so that the clamping air claw can clamp the water inlet and outlet connector placed on the pre-positioning profiling body, and when the displacement air cylinder drives the displacement platform to rotate to the second station, the water inlet and outlet connector of the clamped heating body is driven to be obliquely and upwards arranged, so that welding operation is facilitated, and the welding efficiency and quality are improved.

Description

A clamping mechanism for laser welding equipment for heating element inlet / outlet water connectors Technical Field

[0001] This utility model relates to the field of laser welding equipment technology, and in particular to a clamping mechanism for a laser welding equipment for a heating element inlet / outlet water connector. Background Technology

[0002] In a water boiler, the heating element plays a crucial role, responsible for heating the water to a boiling point. Typically, the heating element has an inlet and outlet connector welded on it. However, due to the unique structure of the heating element, welding these connectors is quite difficult. The structure of the heating element 6, as shown in Figure 1, typically includes an inlet connector 62, an outlet connector 63, and a heating wire 64. The heating wire 64 is very close to the inlet and outlet connectors 62 and 63. During welding, it is necessary to avoid damaging the heating wire 64. However, because the distance between the heating wire 64 and the inlet and outlet connectors 62 and 63 is too close, avoiding the heating wire 64 during welding is quite difficult. Precise welding positioning is often challenging, and errors are easily made during actual operation. This not only affects welding efficiency but may also threaten the safety of the equipment. Therefore, to improve welding efficiency and quality, it is necessary to design a clamping mechanism that facilitates welding the inlet and outlet connectors of the heating element. Summary of the Invention

[0003] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a clamping mechanism for a laser welding equipment for a heating element inlet / outlet water connector. This mechanism has a simple and reasonable structure and is easy to operate. The clamping mechanism can more accurately position the welding point, thereby improving the efficiency and quality of welding.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model relates to a clamping mechanism for a laser welding equipment for a heating element inlet / outlet water connector, comprising a mounting frame, a rotary clamping device, a sliding cylinder, and a positioning cylinder. The positioning cylinder is movably connected to the mounting frame. One side of the mounting frame is movably connected to a positioning platform via the positioning cylinder, and the other side of the mounting frame is fixedly provided with a pre-positioning profile for placing the heating element. The rotary clamping device is mounted to the positioning platform via the sliding cylinder. The rotary clamping device includes a rotating mechanism and a clamping gripper, and the output end of the rotating mechanism is connected to the clamping gripper. The displacement platform has a first station and a second station. When the displacement platform is in the first station, it cooperates with the pre-positioning contour body. The slide cylinder drives the rotating clamping device to move so that the clamping gripper can clamp the water inlet and outlet connectors of the heating element placed on the pre-positioning contour body. When the displacement cylinder drives the displacement platform to rotate to the second station, the displacement platform and the rotating clamping device are inclined upward, causing the water inlet and outlet connectors of the clamped heating element to be inclined upward so as to perform welding operations.

[0006] Furthermore, it also includes a positioning and pressing device, which is located above the pre-positioning contour body. The positioning and pressing device is inclined downward on the mounting frame and fixedly connected to the mounting frame. When the displacement platform is in the second working position, the displacement platform rotates to cooperate with the positioning and pressing device. The positioning and pressing device is used to press the inlet and outlet water connectors onto the heating element.

[0007] Furthermore, when the displacement platform is located at the second work station, the plane on which the displacement platform is located is parallel to the mounting plane of the positioning and clamping device.

[0008] Furthermore, the positioning and pressing device includes a pressing cylinder and a positioning block. The pressing cylinder is fixedly connected to the mounting bracket, and the output end of the pressing cylinder is connected to the positioning block. The positioning block is used to press the inlet and outlet water connectors onto the heating element.

[0009] Furthermore, the positioning block is provided with a groove, the inner wall of which is adapted to the outer wall of the heating element.

[0010] Furthermore, when the positioning platform is located at the first work station, the plane on which the positioning platform is located is parallel to the mounting plane of the prepositioned contour body.

[0011] Furthermore, the water inlet and outlet connectors include a water inlet connector and a water outlet connector. The pre-positioning contour body is provided with a receiving groove that cooperates with the heating element, a first positioning groove for positioning the water inlet connector, and a second positioning groove for positioning the water outlet connector. The first positioning groove and the second positioning groove are both connected to the receiving groove.

[0012] Furthermore, at least a portion of the inner wall of the receiving groove is provided with a straight wall for positioning.

[0013] Furthermore, the rotating mechanism includes a servo motor, a reducer, a coupling, and a rotating shaft. The output end of the servo motor is connected to the reducer for transmission. One end of the rotating shaft is connected to the output end of the reducer through the coupling to drive the rotating shaft to rotate along its axis. The other end of the rotating shaft is connected to the gripping pneumatic gripper.

[0014] Furthermore, the rotary clamping device also includes a pneumatic slip ring, which is connected between the coupling and the clamping gripper, and the rotary shaft passes through the pneumatic slip ring axially.

[0015] The beneficial effects of this utility model are as follows: In operation, the clamping mechanism of the laser welding equipment for the heating element inlet / outlet water connector of this utility model involves placing the heating element on a pre-positioned contoured body. Two spiral water pipes on the heating element extend beyond the first and second positioning grooves, respectively. Inlet and outlet water connectors are respectively fitted onto the extended ends of these two spiral water pipes. Two sets of rotating clamping devices are provided. Each set of rotating clamping devices is installed on the displacement platform via a corresponding sliding cylinder. Initially, the displacement platform is located at the first work position, and the two sets of rotating clamping devices are arranged side-by-side on the displacement platform. After the inlet and outlet water connectors are fitted, the two sets of rotating clamping devices are connected by a sliding cylinder. The cylinders move forward synchronously, causing the first set of rotating clamping devices to grip the inlet connector and the second set of rotating clamping devices to grip the outlet connector. After the inlet and outlet connectors are gripped, the positioning cylinder operates, controlling the positioning platform to rise and position it in the second working position. The heating element and the positioning and clamping device then cooperate. Subsequently, the positioning and clamping device operates, controlling the positioning block to extend and act on the heating element, pressing and positioning the inlet and outlet connectors onto the heating element. After clamping, spot welding is performed on the joints between the inlet connector and the outer wall of the spiral water pipe, and on the joints between the outlet connector and the outer wall of the spiral water pipe, respectively, to achieve basic fixation before welding. After completion, the positioning block is retracted; the gripping claws of the second set of rotating clamping devices are released from the water outlet connector, and the second set of rotating clamping devices retracts via the slide cylinder; the rotating mechanism of the first set of rotating clamping devices operates to drive the gripping claws to rotate, thereby driving the water inlet connector to rotate, so that the water inlet connector can be laser welded in annularly; after the water inlet connector is welded in annularly, the second set of rotating clamping devices moves forward again via the slide cylinder, and the gripping claws of the second set of rotating clamping devices clamp the water outlet connector. Subsequently, the positioning and pressing device operates to control the positioning block to extend and act on the heating element again, pressing and positioning the water inlet connector and the water outlet connector onto the heating element; after pressing, the positioning block is retracted; control The first set of rotary clamping devices releases the gripping claws of the inlet connector. The first set of rotary clamping devices retracts via the slide cylinder. The rotation mechanism of the second set of rotary clamping devices operates to drive the gripping claws to rotate, thereby causing the outlet connector to rotate so that the outlet connector can be laser welded in a ring. After both the outlet connector and the inlet connector are welded, the first set of rotary clamping devices moves forward via the slide cylinder, causing the gripping claws of the first set of rotary clamping devices to hold the inlet connector. The displacement cylinder retracts, controlling the displacement platform to return to the first working position. The gripping claws of both sets of rotary clamping devices are completely released. Both sets of rotary clamping devices retract via the slide cylinder, and the heating element is placed back onto the pre-positioned contour body.

[0016] One end of the positioning platform can be lifted and lowered via a positioning cylinder, allowing the platform to tilt as needed. The heating element is lifted to a certain angle and welded using a slanted welding method. This effectively avoids the risk of the inlet or outlet connector falling off the heating element and ensures that the laser can accurately irradiate the welding area, thus successfully completing the welding work. The clamping mechanism can precisely position the welding point, thereby improving welding efficiency and quality. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the heating element;

[0018] Figure 2 is a cross-sectional structural diagram of this utility model;

[0019] Figure 3 is an enlarged structural diagram of point A in Figure 2;

[0020] Figure 4 is an enlarged structural diagram of point B in Figure 2;

[0021] Figure 5 is a structural schematic diagram of the present invention from a first perspective;

[0022] Figure 6 is a structural schematic diagram of the present invention from a second perspective;

[0023] Figure 7 is a structural schematic diagram of this utility model from a third-person perspective.

[0024] In Figures 1-7: 1. Mounting bracket; 2. Rotary clamping device; 21. Servo motor; 22. Reducer; 23. Coupling; 24. Pneumatic-electric slip ring; 25. Rotary shaft; 26. Clamping gripper; 3. Positioning and pressing device; 31. Pressing cylinder; 32. Positioning block; 321. Groove; 4. Positioning platform; 41. Slide cylinder; 42. Positioning cylinder; 5. Pre-positioning contour body; 51. Receiving groove; 52. First positioning groove; 53. Second positioning groove; 6. Heating element; 61. Spiral water pipe; 62. Water inlet connector; 63. Water outlet connector; 64. Heating wire. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] As shown in Figures 2-7, a clamping mechanism for a laser welding equipment for a heating element inlet / outlet water connector includes a mounting frame 1, a rotary clamping device 2, a sliding cylinder 41, and a positioning cylinder 42. One side of the mounting frame 1 is movably connected to a positioning platform 4 via the positioning cylinder 42. The positioning cylinder 42 is movably connected to the mounting frame 1, and its output end is connected to the positioning platform 4. The other side of the mounting frame 1 is provided with a pre-positioning contoured body 5 for placing the heating element 6. The rotary clamping device 2 is mounted on the positioning platform 4 via the sliding cylinder 41. The sliding cylinder 41 drives the rotary clamping device 2 to move and pick up / place the heating element 6. The rotary clamping device 2 includes a rotating mechanism and a clamping gripper 26. The output end of the rotating mechanism is connected to the clamping gripper 26 to drive its rotation. The positioning platform 4 has a first station and a second station. When the positioning platform is in the first station… At the same time, the displacement platform 4 cooperates with the pre-positioning contour body 5, and the slide cylinder 41 drives the rotary clamping device 2 to move so that the clamping gripper 26 clamps the water inlet and outlet connectors of the heating element 6 placed on the pre-positioning contour body 5. Specifically, the slide cylinder 41 is provided with a slide rail, and the rotary clamping device 2 is slidably connected to the slide rail. The slide cylinder 41 is provided with a drive module, and the drive module drives the rotary clamping device 2 to slide along the slide rail. The drive module of this utility model adopts a linear drive device known in the art. Specifically, a linear drive device refers to a drive device that can generate linear motion. The linear drive device described in this utility model is prior art, so it will not be described in detail here. For example, a ball screw drive can be used, that is, the motor and the ball screw cooperate to convert the rotational motion of the motor into linear motion. Of course, a linear motor direct drive can also be used to achieve linear motion.

[0027] Referring to Figure 1, the water inlet and outlet connectors include a water inlet connector 62 and a water outlet connector 63. The clamping gripper 26 is used to clamp the water inlet connector 62 or the water outlet connector 63 on the heating element 6. When the displacement cylinder 42 drives the displacement platform 4 to rotate to the second working position, the displacement platform 4 and the rotating clamping device 2 are inclined upward, which causes the water inlet and outlet connectors of the clamped heating element 6 to be inclined upward, so as to carry out welding operations.

[0028] Preferably, in this embodiment, referring to Figure 2, a positioning and clamping device 3 is also included. The positioning and clamping device 3 is located above the prepositioning contour body 5. The positioning and clamping device 3 is inclined downward on the mounting frame 1 and fixedly connected to the mounting frame 1. When the displacement platform 4 rotates to the second working position, the displacement platform 4 cooperates with the positioning and clamping device 3. After the displacement platform 4 rotates to the position, the positioning and clamping device 3 extends to work and is used to clamp the inlet and outlet water connectors onto the heating element 6, so that the inlet water connector 62 and the outlet water connector 63 are clamped to the accurate position before welding, avoiding the problem of low welding accuracy due to position deviation during welding. After clamping, the positioning and clamping device 3 is controlled to retract, and then the rotating clamping device 2 drives the inlet water connector 62 or the outlet water connector 63 to rotate so that the inlet water connector 62 or the outlet water connector 63 can be subjected to ring laser welding.

[0029] Preferably, in this embodiment, referring to Figures 5 and 7, when the positioning platform 4 is located at the second station, the plane of the positioning platform 4 is parallel to the mounting plane of the positioning and clamping device 3 to ensure that the heating element 6 has the best posture and angle, and can better cooperate with the positioning and clamping device 3. In addition, by lifting the heating element 6 to a certain angle through the positioning platform 4 and welding it by oblique welding, the risk of the water inlet connector 62 or the water outlet connector 63 falling off the heating element 6 can be effectively avoided, and the laser can accurately irradiate the welding part, thereby successfully completing the welding process. Specifically, before welding, the inlet connector 62 and outlet connector 63 are still in a loose fit with the heating element 6. If the heating element 6 is placed horizontally for welding, the inlet connector 62 or outlet connector 63 may fall off the heating element 6, resulting in welding failure. If the heating element 6 is placed vertically, a new problem arises: the laser cannot accurately contact the part to be welded, making welding more difficult. Therefore, by clamping it with the positioning and clamping device 3 and then using oblique welding, the welding work can be completed more smoothly.

[0030] Preferably, in this embodiment, referring to Figure 6, the rotary clamping device 2 is provided in two sets. Each set of rotary clamping devices 2 is installed on the displacement platform 4 through a corresponding sliding cylinder 41. Specifically, the two sets of rotary clamping devices 2 are arranged side by side on the displacement platform 4. The first set of rotary clamping devices 2 is used to clamp the water inlet connector 62, and the second set of rotary clamping devices 2 is used to clamp the water outlet connector 63.

[0031] Preferably, in this embodiment, referring to FIG7, the positioning block 32 is provided with a groove 321, the inner wall of the groove 321 is adapted to the outer wall of the heating element 6, so that the positioning block 32 can better apply force to the heating element 6.

[0032] Preferably, in this embodiment, referring to Figure 7, the pre-positioning contour body 5 is provided with a receiving groove 51 that cooperates with the heating element 6, a first positioning groove 52 for positioning the water inlet connector 62, and a second positioning groove 53 for positioning the water outlet connector 63. The first positioning groove 52 and the second positioning groove 53 are both connected to the receiving groove 51. The heating element 6 is provided with two spiral water pipes 61, which extend out of the first positioning groove 52 and the second positioning groove 53 respectively. The water inlet connector 62 and the water outlet connector 63 are respectively sleeved on the extended ends of the two spiral water pipes 61. The spiral water pipes 61 are positioned in the first positioning groove 52 or the second positioning groove 53, so that the water inlet connector 62 or the water outlet connector 63 is positioned in a preset position.

[0033] Preferably, in this embodiment, at least a portion of the inner wall of the receiving groove 51 is provided with a straight wall for positioning, so that the heating element 6 can be more easily positioned in the receiving groove 51 and is less likely to have undesirable displacement.

[0034] Preferably, in this embodiment, referring to Figure 5, the displacement cylinder 42 is located below the displacement platform 4. The output end of the displacement cylinder 42 is connected to one end of the displacement platform 4 near the clamping gripper 26, and the other end of the displacement cylinder 42 is hinged to the mounting bracket 1 to ensure a stable and reliable connection. One end of the displacement platform 4 can achieve the function of lifting and lowering through the displacement cylinder 42, so that the displacement platform 4 can be tilted as needed.

[0035] Preferably, in this embodiment, referring to Figure 2, when the displacement platform 4 is located at the first work station, the plane of the displacement platform 4 is parallel to the mounting plane of the prepositioning contour body 5, so as to ensure that the rotating clamping device 2 can more conveniently clamp the heating element 6 on the prepositioning contour body 5.

[0036] Preferably, in this embodiment, referring to Figures 2-4, the rotating mechanism includes a servo motor 21, a reducer 22, a coupling 23, and a rotating shaft 25. The output end of the servo motor 21 is connected to the reducer 22 for transmission. One end of the rotating shaft 25 is connected to the output end of the reducer 22 through the coupling 23 to drive the rotating shaft 25 to rotate along its axis. The coupling 23 can ensure the stable and reliable connection between the rotating shaft 25 and the reducer 22 and transmit rotational motion. The other end of the rotating shaft 25 is connected to the gripping pneumatic gripper 26. The rotation of the rotating shaft 25 drives the gripping pneumatic gripper 26 to rotate synchronously.

[0037] Preferably, in this embodiment, referring to FIG4, the rotary clamping device 2 further includes a pneumatic slip ring 24. The pneumatic slip ring 24 includes a stator and a rotor. The rotor cooperates with the stator and can rotate relative to the stator. The pneumatic slip ring 24 is connected between the coupling 23 and the clamping gripper 26. The rotating shaft 25 passes through the pneumatic slip ring 24 axially. The pneumatic slip ring 24 is used to transmit gas and electricity to ensure the normal operation of the rotary clamping device 2. The pneumatic slip ring 24 is prior art and will not be described in detail here. Specifically, the servo motor 21 drives the reducer 22 to drive the coupling 23, the rotor of the pneumatic slip ring 24, the rotating shaft 25 and the clamping gripper 26 to rotate.

[0038] The working principle of this utility model is as follows: The heating element 6 is placed on the pre-positioned contour body 5. The two spiral water pipes 61 on the heating element 6 extend out of the first positioning groove 52 and the second positioning groove 53, respectively. The inlet connector 62 and the outlet connector 63 are respectively fitted on the extended ends of the two spiral water pipes 61. Two sets of rotating clamping devices 2 are provided. Each set of rotating clamping devices 2 is installed on the displacement platform 4 through a corresponding sliding cylinder 41. In the initial state, the displacement platform 4 is located in the first working position. The two sets of rotating clamping devices 2 are arranged side by side on the displacement platform 4. After the inlet connector 62 and the outlet connector 63 are fitted, the two sets of rotating clamping devices 2 move forward synchronously through the sliding cylinder 41, so that the clamping claw 26 of the first set of rotating clamping devices 2 grips... Holding the inlet connector 62, the clamping grippers 26 of the second set of rotating clamping devices 2 clamp the outlet connector 63. After clamping the inlet connector 62 and the outlet connector 63, the displacement cylinder 42 operates, controlling the displacement platform 4 to rise, so that the displacement platform 4 is in the second working position, and the heating element 6 and the positioning and pressing device 3 cooperate accordingly. Subsequently, the positioning and pressing device 3 operates to control the positioning block 32 to extend and act on the heating element 6, pressing and positioning the inlet connector 62 and the outlet connector 63 onto the heating element 6. After pressing, spot welding is performed on the joint between the inlet connector 62 and the outer wall of the spiral water pipe 61 and the joint between the outlet connector 63 and the outer wall of the spiral water pipe 61 according to the procedure, to achieve basic fixation before welding. After spot welding is completed, the positioning block 32 is retracted; the second set of rotating clamps is controlled. The gripping claw 26 of the first set of rotating gripping devices 2 releases the water outlet connector 63, and the second set of rotating gripping devices 2 retracts via the slide cylinder 41. The rotating mechanism of the first set of rotating gripping devices 2 operates to drive the gripping claw 26 to rotate, thereby driving the water inlet connector 62 to rotate so that the water inlet connector 62 can be laser welded in an annular shape. After the water inlet connector 62 is welded in an annular shape, the second set of rotating gripping devices 2 moves forward again via the slide cylinder 41, and the gripping claw 26 of the second set of rotating gripping devices 2 clamps the water outlet connector 63. Subsequently, the positioning and pressing device 3 operates to control the positioning block 32 to extend and act on the heating element 6 again, pressing and positioning the water inlet connector 62 and the water outlet connector 63 onto the heating element 6. After pressing, the positioning block 32 is retracted. The first set of rotating gripping devices 2 is controlled to... The gripping claw 26 releases the water inlet connector 62, the first set of rotating gripping devices 2 retracts via the slide cylinder 41, and the rotating mechanism of the second set of rotating gripping devices 2 operates to drive the gripping claw 26 to rotate, thereby driving the water outlet connector 63 to rotate so that the water outlet connector 63 can be subjected to ring laser welding; after the water outlet connector 63 and the water inlet connector 62 are both welded, the first set of rotating gripping devices 2 moves forward via the slide cylinder 41, and the gripping claw 26 of the first set of rotating gripping devices 2 clamps the water inlet connector 62, the displacement cylinder 42 retracts, and the displacement platform 4 is controlled to return to the first working position, the gripping claws 26 of both sets of rotating gripping devices 2 are completely released, both sets of rotating gripping devices 2 are retracted via the slide cylinder 41, and the heating element 6 is placed back onto the pre-positioned contour body 5.

[0039] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A jig mechanism of a laser welding apparatus for a water inlet and outlet joint of a heating element, characterized by: The device includes a mounting frame (1), a rotary clamping device (2), a slide cylinder (41), and a displacement cylinder (42). The displacement cylinder (42) is movably connected to the mounting frame (1). One side of the mounting frame (1) is movably connected to a displacement platform (4) via the displacement cylinder (42). The other side of the mounting frame (1) is fixedly provided with a pre-positioning conformer (5) for placing the heating element (6). The rotary clamping device (2) is mounted on the displacement platform (4) via the slide cylinder (41). The rotary clamping device (2) includes a rotating mechanism and a clamping gripper (26). The output end of the rotating mechanism is connected to the clamping gripper (26) to drive the clamping gripper (26). 6) Rotation: The displacement platform (4) has a first station and a second station. When the displacement platform (4) is in the first station, the displacement platform (4) cooperates with the prepositioning contour body (5). The slide cylinder (41) drives the rotating clamping device (2) to move so that the clamping gripper (26) clamps the water inlet and outlet connector of the heating element (6) placed on the prepositioning contour body (5). When the displacement cylinder (42) drives the displacement platform (4) to rotate to the second station, the displacement platform (4) and the rotating clamping device (2) are inclined upward, which drives the water inlet and outlet connector of the clamped heating element (6) to be inclined upward so as to perform welding operations.

2. The fixture mechanism of a laser welding apparatus for a water inlet and outlet joint of a heating element according to claim 1, characterized in that: It also includes a positioning and pressing device (3), which is located above the prepositioning contour body (5). The positioning and pressing device (3) is inclined downward on the mounting frame (1) and fixedly connected to the mounting frame (1). When the displacement platform (4) is located in the second working position, the displacement platform (4) cooperates with the positioning and pressing device (3). The positioning and pressing device (3) is used to press the inlet and outlet water connectors onto the heating element (6).

3. The fixture mechanism of a laser welding apparatus for a water inlet and outlet joint of a heating element according to claim 2, characterized in that: When the displacement platform (4) is located at the second work station, the plane where the displacement platform (4) is located is parallel to the installation plane of the positioning and pressing device (3).

4. The fixture mechanism of a laser welding apparatus for a water inlet and outlet joint of a heating element according to claim 2, characterized in that: The positioning and pressing device (3) includes a pressing cylinder (31) and a positioning block (32). The pressing cylinder (31) is fixedly connected to the mounting bracket (1). The output end of the pressing cylinder (31) is connected to the positioning block (32). The positioning block (32) is used to press the inlet and outlet water connectors onto the heating element (6).

5. The fixture mechanism of a laser welding apparatus for a water inlet and outlet joint of a heating element according to claim 4, characterized in that: The positioning block (32) is provided with a groove (321), the inner wall of which is adapted to the outer wall of the heating element (6).

6. The fixture mechanism of a laser welding apparatus for a water inlet and outlet joint of a heating element according to claim 1, characterized in that: When the displacement platform (4) is located at the first work station, the plane where the displacement platform (4) is located is parallel to the installation plane of the prepositioning model body (5).

7. The fixture mechanism of a laser welding apparatus for a water inlet and outlet joint of a heating element according to claim 1, characterized in that: The inlet and outlet water connectors include an inlet connector (62) and an outlet connector (63). The prepositioning contour body (5) is provided with a receiving groove (51) that cooperates with the heating element (6), a first positioning groove (52) for positioning the inlet connector (62), and a second positioning groove (53) for positioning the outlet connector (63). The first positioning groove (52) and the second positioning groove (53) are both connected to the receiving groove (51).

8. The fixture mechanism of a laser welding apparatus for a water inlet and outlet joint of a heating element according to claim 7, characterized in that: The inner wall of the receiving groove (51) is provided with a straight wall for positioning in at least a portion of the area.

9. The fixture mechanism of a laser welding apparatus for a water inlet and outlet joint of a heating element according to claim 1, characterized in that: The rotating mechanism includes a servo motor (21), a reducer (22), a coupling (23), and a rotating shaft (25). The output end of the servo motor (21) is connected to the reducer (22) for transmission. One end of the rotating shaft (25) is connected to the output end of the reducer (22) through the coupling (23) to drive the rotating shaft (25) to rotate along its axis. The other end of the rotating shaft (25) is connected to the gripping pneumatic gripper (26).

10. The fixture mechanism of a laser welding apparatus for a water inlet and outlet joint of a heating element according to claim 9, characterized in that: The rotary clamping device (2) also includes a pneumatic slip ring (24), which is connected between the coupling (23) and the clamping gripper (26), and the rotary shaft (25) passes through the pneumatic slip ring (24) axially.

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