An ultra-high-speed laser cladding device suitable for additive manufacturing of pipeline inner walls

Abstract

The present invention provides an ultra-high-speed laser cladding device suitable for additive manufacturing of pipe inner walls, comprising a swinging device, a clamping device, and a laser cladding device; the clamping device comprises a four-jaw chuck and a support frame; one swinging device is connected to the four-jaw chuck and is used to drive the pipe to be processed to swing back and forth; the cladding device comprises a nozzle, a cooling device, a telescopic rod, and a laser; one end of the telescopic rod can extend into the inner wall of the pipe to be processed; the nozzle is mounted on one end of the telescopic rod; the other end of the telescopic rod is connected to an actuator for linear movement of the telescopic rod; the cooling device is mounted on one side of the nozzle; the laser beam is transmitted through the interior of the telescopic rod to the nozzle outlet; and another swinging device is connected to the telescopic rod and is used to drive the telescopic rod to swing back and forth in a direction opposite to that of the pipe to be processed. The present invention achieves ultra-high-speed cladding by operating the workpiece and the cladding device in opposite directions.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cladding, and in particular to an ultra-high-speed laser cladding device suitable for additive manufacturing of the inner wall of a small pipeline. Background Art

[0002] Common mechanical components such as cylinders, bearings, valves, sleeves, molds, and pneumatic cylinders require inner walls that are wear-resistant, corrosion-resistant, and impact-resistant. Therefore, they require processing of the inner walls before use or after fatigue damage occurs. Compared to outer wall processing, inner wall processing is limited by limited processing space. This is especially true for workpieces with smaller inner diameters and deeper holes, which require higher technical processing techniques. Inner wall laser cladding is a technology that can be applied to inner wall metal surface modification.

[0003] Currently, laser cladding technology is widely used on large-diameter pipes, but less so on small and medium-diameter pipes. This is primarily due to space constraints, making it difficult for the laser head to enter the pipe, resulting in a complex and costly process. Furthermore, in conventional laser cladding equipment, the laser only begins focusing at a relatively far distance, resulting in low processing efficiency and difficulty achieving good processing quality. Currently, the minimum diameter of the pipe inner wall that can be processed by conventional laser cladding is 46mm, while the minimum diameter that can be processed by high-speed laser cladding is 80mm. The advantages of ultra-high-speed laser cladding technology lie in its high processing efficiency and high quality, which can effectively compensate for the shortcomings of existing inner wall laser cladding. Summary of the Invention

[0004] To address the shortcomings of the existing technology, the present invention provides an ultra-high-speed laser cladding device suitable for additive manufacturing of pipe inner walls. Using a linear motor to provide power, the workpiece and the cladding device operate in opposite directions, achieving ultra-high speeds and improving processing efficiency. Powder is ejected through a powder feeder and converges at the laser focal point, melting above the pipe wall to form molten beads. Centrifugal force accelerates these beads onto the pipe wall, forming a dense, compact coating, significantly improving processing quality. The combination of a laser, a telescopic rod, and a replaceable nozzle allows for adaptability to a variety of processing needs.

[0005] The present invention achieves the above technical objectives through the following technical means.

[0006] An ultra-high-speed laser cladding device suitable for additive manufacturing of pipeline inner walls, comprising a swing device, a clamping device and a laser cladding device;

[0007] The clamping device includes a four-jaw chuck and a support frame; the four-jaw chuck is used to clamp the pipe to be processed; the support frame is used to support the pipe to be processed; a swing device is connected to the four-jaw chuck, and is used to drive the pipe to be processed to swing back and forth;

[0008] The cladding device includes a nozzle, a cooling device, a telescopic rod and a laser; one end of the telescopic rod can be extended into the inner wall of the pipe to be processed; a nozzle is installed on one end of the telescopic rod; the other end of the telescopic rod is connected to an actuator for moving the telescopic rod linearly; the cooling device is installed on one side of the nozzle; the laser is used to generate a laser beam, which is transmitted to the nozzle outlet through the inside of the telescopic rod; another swing device is connected to the telescopic rod, used to drive the telescopic rod to swing back and forth, and the reciprocating swing direction of the telescopic rod is opposite to the reciprocating swing direction of the pipe to be processed.

[0009] Furthermore, an integrating mirror is provided inside the nozzle for focusing the laser beam; a powder feeding device is integrated below the nozzle, and the powder convergence center is aligned with the focal center of the integrating mirror.

[0010] Furthermore, the swing device includes a linear motion mechanism and a swing mechanism; the linear motion mechanism includes a workbench, a motor, a lead screw and a slider; the motor is installed on the workbench, the lead screw is installed at the output end of the motor, and the slider is installed on the lead screw;

[0011] The swing mechanism includes a swing rod and a support seat; the rotating shaft on the swing rod is supported on the support seat, and the rotating shaft of the swing rod is connected to the four-jaw chuck / telescopic rod; a groove is provided on the swing rod; a raised connecting block is provided on one side of the slider, and the connecting block is located in the groove, and the swing rod is driven to rotate by the movement of the slider.

[0012] Furthermore, an auxiliary supporting device is provided at the front end of the telescopic rod, and the auxiliary supporting device includes a supporting wheel for supporting the telescopic rod.

[0013] Furthermore, the rotation center of the swing device, the axis of the clamping device and the telescopic direction of the telescopic rod are parallel.

[0014] Furthermore, at least one reflector is installed inside the telescopic rod to change the path of the laser beam; and the angle between the laser beam and the powder flow is changed by adjusting the angle of the reflector.

[0015] Furthermore, the laser is mounted on a telescopic rod, and the laser swings synchronously with the telescopic rod.

[0016] The beneficial effects of the present invention are:

[0017] 1. The ultra-high-speed laser cladding device for additive manufacturing of pipe inner walls described in the present invention has an actual maximum feed speed of up to 210 m / min for existing linear motors. The reciprocating motion of the linear motor is converted into rotational motion by a swinging device. The reverse operation of the swinging devices on both sides causes relative motion between the pipe to be processed and the nozzle, providing the entire device with an angular velocity of nearly 14 rad / s. Taking a pipe inner wall with a diameter of 50 mm as an example, the cladding system can achieve a cladding speed of 21 m / min, thus achieving ultra-high-speed laser cladding.

[0018] 2. The ultra-high-speed laser cladding device suitable for additive manufacturing of pipe inner walls described in the present invention is designed with an auxiliary support device at the front end of the nozzle. Through a pair of rigid rollers with adjustable angles, the rigidity of the telescopic rod can be improved without affecting the processing quality.

[0019] 3. The ultra-high-speed laser cladding device suitable for additive manufacturing of pipeline inner walls described in the present invention has an integrated reflector and integrator mirror at the nozzle of the cladding device, which can solve the problem that the laser cannot be accurately focused due to the excessive depth of the pipeline.

[0020] 4. The ultra-high-speed laser cladding device suitable for additive manufacturing of the inner wall of a pipeline described in the present invention is provided with a follow-up air cooling device, which blows out low-speed and low-temperature protective gas through an air pipe close to the pipeline wall to cool the inner wall of the pipeline.

[0021] 5. The ultra-high-speed laser cladding device suitable for additive manufacturing of the inner wall of a pipeline described in the present invention has a nozzle part that can be replaced according to different processing requirements, making the processing more flexible.

[0022] 6. The ultra-high-speed laser cladding device suitable for additive manufacturing of pipeline inner walls described in the present invention has a suitable laser power of 3500W to 9000W. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are some embodiments of the present invention. For ordinary technicians in this field, it is obvious that other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a three-dimensional diagram of the ultra-high-speed laser cladding device suitable for additive manufacturing of pipeline inner walls described in the present invention.

[0025] Figure 2 It is a two-dimensional diagram of the power device described in the present invention.

[0026] Figure 3A three-dimensional diagram of the oscillating device according to the present invention.

[0027] Figure 4 A three-dimensional diagram of the four-jaw chuck described in the present invention.

[0028] Figure 5 It is a planar cross-sectional view of the nozzle of the cladding device described in the present invention.

[0029] Figure 6 This is a three-dimensional diagram of the auxiliary support device described in the present invention.

[0030] In the picture:

[0031] 1-linear motion mechanism; 1-1-workbench; 1-2-motor; 1-3-screw; 1-4-slider; 2-swing device; 2-1-swing rod; 2-2-support seat; 3-four-jaw chuck; 3-1-flange; 3-2-claw; 4-support frame; 5-nozzle; 5-1-auxiliary support device; 5-2-reflector; 5-3-integrating mirror; 5-4-powder feeding device; 6-cooling device; 7-telescopic rod; 8-laser. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0033] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "axial", "radial", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] like Figure 1 As shown, the ultra-high-speed laser cladding device suitable for additive manufacturing of the inner wall of a pipeline described in the present invention includes a swinging device 2, a clamping device and a laser cladding device; the clamping device includes a four-jaw chuck 3 and a support frame 4; the four-jaw chuck 3 is used to clamp the pipeline to be processed; the support frame 4 is used to support the pipeline to be processed; one of the swinging devices 2 is connected to the four-jaw chuck 3, and is used to drive the pipeline to be processed to swing back and forth; the cladding device includes a nozzle 5, a cooling device 6, a telescopic rod 7 and a laser 8; one end of the telescopic rod 7 can be extended into the inner wall of the pipeline to be processed; the nozzle 5 is installed at one end of the telescopic rod 7; the other end of the telescopic rod 7 is connected to the actuator, and is used to make the telescopic rod 7 move linearly; the cooling device 6 is installed on one side of the nozzle 5; the laser 8 is used to generate a laser beam, and the laser beam is transmitted to the outlet of the nozzle 5 through the inside of the telescopic rod 7; the other swinging device 2 is connected to the telescopic rod 7, and is used to drive the telescopic rod 7 to swing back and forth, and the reciprocating swing direction of the telescopic rod 7 is opposite to the reciprocating swing direction of the pipeline to be processed. The present invention utilizes the swing device 2 to provide power, so that the pipe to be processed and the telescopic rod 7 rotate in opposite directions, so as to achieve ultra-high speed, thereby improving processing efficiency.

[0037] like Figure 5 and Figure 6 As shown, the nozzle 5 is internally equipped with an integrating mirror 5-3 for focusing the laser beam. A powder feeder 5-4 is integrated below the nozzle 5, with the powder convergence center aligned with the focal point of the integrating mirror 5-3. An auxiliary support device 5-1 is provided at the front end of the telescopic rod 7. The auxiliary support device 5-1 includes support wheels for supporting the telescopic rod 7. At least one reflector 5-2 is mounted within the telescopic rod 7 to change the path of the laser beam. Adjusting the angle of the reflector 5-2 changes the angle between the laser beam and the powder flow.

[0038] like Figure 2 and Figure 3As shown, the swing mechanism 2 comprises a linear motion mechanism 1 and a swing mechanism. The linear motion mechanism 1 includes a worktable 1-1, a motor 1-2, a lead screw 1-3, and a slider 1-4. The motor 1-2 is mounted on the worktable 1-1, with the lead screw 1-3 mounted on the output end of the motor 1-2, and the slider 1-4 mounted on the lead screw 1-3. The swing mechanism comprises a swing rod 2-1 and a support base 2-2. The rotating shaft of the swing rod 2-1 is supported on the support base 2-2, and the rotating shaft of the swing rod 2-1 is connected to the four-jaw chuck 3 / telescopic rod 7. The swing rod 2-1 is provided with a groove. The slider 1-4 has a raised connecting block on one side, which is located in the groove. The movement of the slider 1-4 drives the swing rod 2-1 to rotate. The center of rotation of the swing mechanism 2, the axis of the clamping device, and the extension and retraction direction of the telescopic rod 7 are parallel. The laser 8 is mounted on the telescopic rod 7 and swings synchronously with the telescopic rod 7.

[0039] like Figure 4 As shown, the four-jaw chuck 3 includes a flange 3-1 and jaws 3-2; the four jaws 3-2 are radially distributed on the flange 3-1; the jaws 3-2 can move radially to clamp the outer wall of the pipe to be processed.

[0040] Working Principle: Motor 1-2 rotates forward and reverse, driving slider 1-4 in reciprocating linear motion on lead screw 1-3. This provides reciprocating power to swing mechanism 2, which in turn provides rotational power to the entire device, enabling the entire device to achieve cladding speeds that meet ultra-high-speed laser cladding standards. Powder is ejected through powder feed tube 5-4, where it is melted by the laser above the pipe wall, forming molten beads. Centrifugal force accelerates these beads onto the pipe surface, forming a dense, compact coating. The telescopic rod 7 is controlled to accommodate various processing requirements. By adjusting the nozzle 5 and telescopic rod 7, the surface modification of the inner wall of a slender pipe can be achieved.

[0041] The ultra-high-speed laser cladding device for additive manufacturing of pipeline inner walls described in the present invention is suitable for a laser power of 3500W to 9000W.

[0042] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0043] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ultra-high-speed laser cladding device suitable for additive manufacturing of pipeline inner walls, characterized in that: It includes a swing device (2), a clamping device and a laser cladding device; The clamping device comprises a four-jaw chuck (3) and a support frame (4); the four-jaw chuck (3) is used to clamp the pipe to be processed; the support frame (4) is used to support the pipe to be processed; a swing device (2) is connected to the four-jaw chuck (3) and is used to drive the pipe to be processed to swing back and forth; The cladding device comprises a nozzle (5), a cooling device (6), a telescopic rod (7) and a laser (8); one end of the telescopic rod (7) can be extended into the inner wall of the pipe to be processed; the nozzle (5) is installed at one end of the telescopic rod (7); the other end of the telescopic rod (7) is connected to an actuator for moving the telescopic rod (7) linearly; the cooling device (6) is installed on one side of the nozzle (5); the laser (8) is used to generate a laser beam, which is transmitted to the nozzle (5) outlet through the inside of the telescopic rod (7); another swing device (2) is connected to the telescopic rod (7) and is used to drive the telescopic rod (7) to swing back and forth, and the reciprocating swing direction of the telescopic rod (7) is opposite to the reciprocating swing direction of the pipe to be processed; The swing device (2) comprises a linear motion mechanism (1) and a swing mechanism; the linear motion mechanism (1) comprises a workbench (1-1), a motor (1-2), a lead screw (1-3) and a slider (1-4); the motor (1-2) is mounted on the workbench (1-1), the lead screw (1-3) is mounted on the output end of the motor (1-2), and the slider (1-4) is mounted on the lead screw (1-3); The swing mechanism comprises a swing rod (2-1) and a support seat (2-2); the rotating shaft on the swing rod (2-1) is supported on the support seat (2-2), and the rotating shaft of the swing rod (2-1) is connected to the four-claw chuck (3) / telescopic rod (7); the swing rod (2-1) is provided with a groove; a protruding connecting block is provided on one side of the slider (1-4), and the connecting block is located in the groove, and the swing rod (2-1) is driven to rotate by the movement of the slider (1-4).

2. The ultra-high-speed laser cladding device for additive manufacturing of pipeline inner walls according to claim 1 is characterized in that: An integrating mirror (5-3) is provided inside the nozzle (5) for focusing the laser beam; a powder feeding device (5-4) is integrated below the nozzle (5), and the powder convergence center is aligned with the focal center of the integrating mirror (5-3).

3. The ultra-high-speed laser cladding device for additive manufacturing of pipeline inner walls according to claim 1 is characterized in that: An auxiliary support device (5-1) is provided at the front end of the telescopic rod (7), and the auxiliary support device (5-1) comprises a support wheel for supporting the telescopic rod (7).

4. The ultra-high-speed laser cladding device for additive manufacturing of pipeline inner walls according to claim 1 is characterized in that: The rotation center of the swing device (2), the axis of the clamping device and the telescopic direction of the telescopic rod (7) are parallel.

5. The ultra-high-speed laser cladding device suitable for additive manufacturing of pipeline inner walls according to claim 1 is characterized in that: At least one reflector (5-2) is installed inside the telescopic rod (7) for changing the path of the laser beam; and the angle between the laser beam and the powder flow is changed by adjusting the angle of the reflector (5-2).

6. The ultra-high-speed laser cladding device for additive manufacturing of pipeline inner walls according to claim 1 is characterized in that: The laser (8) is mounted on the telescopic rod (7), and the laser (8) and the telescopic rod (7) swing synchronously.

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