Rotatable laser cladding device

Abstract

The utility model discloses a rotatable laser cladding device which comprises a laser head, a cladding head and a rotating mechanism, the laser head and the cladding head are coaxially arranged, the rotating mechanism is connected with the laser head and the cladding head, and the axis of the rotating mechanism coincides with the axis of the laser head. The rotating mechanism is used for driving the cladding head to rotate 360 degrees at a low speed without a dead angle, so as to carry out cladding on a workpiece; the rotating mechanism comprises a hollow rotating platform and a sliding ring, and a plurality of inlets and outlets are formed in the sliding ring; the inlets and the outlets are used for being communicated with external material equipment, so that all materials sequentially pass through a channel of the sliding ring and a material channel of the cladding head and then are conveyed to the end part of the cladding head for cladding; the rotating speed range of the device is 0.20-50.0 Rpm, and the device can be used for cladding the inner wall of a non-rotary body, a composite component inner hole or a non-detachable pipe fitting which have the inner diameter of 50-500mm and cannot rotate.

Description

Technical Field

[0001] The utility model belongs to the field of laser processing, and in particular relates to a rotatable laser cladding device. Background Art

[0002] At present, laser cladding technology has been widely used in the outer and inner wall cladding and strengthening of hydraulic cylinders, solving the wear resistance problem of key components of hydraulic supports under coal mine conditions. However, existing outer wall cladding equipment and inner wall cladding technology can only meet the cladding processing of flat surfaces, outer arc surfaces and simple rotating outer and inner surfaces, but cannot be used for complex inner hole components with huge mass and volume and non-rotating inner surface cladding processing represented by engine cylinders, which limits the application scope of laser cladding technology.

[0003] Rotary laser cladding equipment can achieve inner surface cladding of non-rotating bodies. Patent CN214655246U points out that the rotary cladding system satisfies the transmission of powder, gas and water in the rotation process of the cladding equipment by setting a hollow rotating spindle and dynamic and static seals, and realizes the cladding of non-rotating bodies represented by engine cylinders. However, the rotary cladding equipment of this patent has problems such as complex design and poor powder feeding continuity, which affect the quality of the cladding layer. Patent CN113215561A points out that by setting the laser head and the cladding head along the axis, the rotation of the laser light path is achieved, and the inner wall processing of the workpiece can be met by rotation. However, the use of a rotary joint to transport the powder, water and gas required for the cladding process may have intermittent problems, and no components such as bearings and couplings are found to ensure the rotation accuracy, which may easily lead to jitter problems in the cladding process. Patent CN113481504A points out that the gun body system is rotated at a high speed of more than 300Rpm through a power system. However, the linear speed of laser cladding is generally 0.05-5m / min, and the corresponding speed range for cladding of a hole with an inner diameter of 100mm is only 0.157-15.7Rpm. Therefore, a high speed of up to 300Rpm is difficult to meet the heat input of cladding, resulting in the cladding powder not being melted or the molten pool temperature being too low, which seriously affects the quality of the cladding layer. Utility Model Content

[0004] The utility model aims to provide a rotatable laser cladding device to solve the problems in the prior art of complex design, poor powder feeding continuity, intermittent powder, water and gas feeding required for the cladding process, and difficulty in meeting the heat input for cladding at high speed.

[0005] The utility model adopts the following technical scheme: a rotatable laser cladding device, comprising a coaxially arranged laser head and a cladding head and a rotating mechanism connecting the laser head and the cladding head, wherein the axis of the rotating mechanism coincides with the axis of the laser head; the rotating mechanism is used to drive the cladding head to rotate 360 ​​degrees at a low speed without dead angles, thereby cladding the workpiece;

[0006] The rotating mechanism includes:

[0007] A hollow rotating platform, the upper side of the turntable of the hollow rotating platform is connected to the laser head through an optical fiber connector, and the side of the turntable of the hollow rotating platform is connected to a servo motor through a reducer;

[0008] The upper side of the slip ring is fixedly connected to the lower side of the turntable of the hollow rotating platform through a flange, and a plurality of inlets and outlets are provided on the slip ring; each inlet and outlet is used to communicate with external material equipment, and then each material is sequentially conveyed to the end of the cladding head through the channel of the slip ring and the material channel of the cladding head for cladding;

[0009] The slip ring is used to drive the inner cylinder of the slip ring to rotate through the hollow rotating platform under the drive of the servo motor, thereby driving the cladding head to rotate.

[0010] Furthermore, the slip ring is provided with seven inlets and seven outlets to form seven channels, and the seven channels are respectively 4 powder channels, 1 protective gas channel, 1 water inlet channel and 1 water return channel.

[0011] Furthermore, a fixed plate is fixedly connected between the hollow rotating platform and the laser head. The fixed plate is "L"-shaped, and its horizontal section is fixedly connected to the upper side of the hollow rotating platform, and its vertical section is used to be fixedly connected to the outer cylinder of the slip ring. The vertical section is also used to connect to an external robot.

[0012] The beneficial effects of the utility model are:

[0013] The utility model has a rotation speed range of 0.20-50.0Rpm, and can be used for cladding the inner wall of a non-rotating body with an inner diameter of 50-500mm and non-rotatable, the inner hole of a composite component, or a non-detachable pipe fitting;

[0014] The powder, gas and water required by the utility model can be continuously transported, and the utility model can rotate around an axis, and the inner wall of the workpiece can be processed by the rotation, so that the workpiece does not need to be rotated, and the cladding strengthening of the inner hole is achieved only by the rotatable utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model;

[0016] Among them: 10, laser head; 11, cladding head; 12, rotating mechanism; 13, hollow rotating platform; 14, slip ring; 15, reducer; 16, fixed plate; 17, horizontal section; 18, vertical section. DETAILED DESCRIPTION

[0017] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0018] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. 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 technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more. The "direction" in the present utility model is based on the position of the present utility model in the Figure 1 Description of the trend in the state.

[0019] The utility model discloses a rotatable laser cladding device, such as Figure 1 As shown, it includes a coaxially arranged laser head 10 and a cladding head 11 and a rotating mechanism 12 connecting the laser head 10 and the cladding head 11. The axis of the rotating mechanism 12 coincides with the axis of the laser head 10; the rotating mechanism 12 is used to drive the cladding head 11 to rotate 360 ​​degrees at a low speed without dead angles, thereby cladding the workpiece.

[0020] The rotating mechanism 12 includes a hollow rotating platform 13 and a slip ring 14 .

[0021] The upper side of the turntable of the hollow rotating platform 13 is connected to the laser head 10 through an optical fiber connector, and the side of the turntable of the hollow rotating platform 13 is connected to a servo motor through a reducer 15; the upper side of the slip ring 14 is fixedly connected to the lower side of the turntable of the hollow rotating platform 13 through a flange, and a plurality of inlets and outlets are provided on the slip ring 14; each inlet and outlet is used to communicate with external material equipment, and then each material is sequentially transported to the end of the cladding head 11 through the channel of the slip ring 14 and the material channel of the cladding head 11 for cladding.

[0022] The slip ring 14 is used to drive the inner cylinder of the slip ring 14 to rotate through the hollow rotating platform 13 under the drive of the servo motor, thereby driving the cladding head 11 to rotate. The slip ring 14 is provided with seven inlets and seven outlets to form seven channels, which are 4 powder channels, 1 protective gas channel, 1 water inlet channel and 1 water return channel.

[0023] A fixing plate 16 is fixedly connected between the hollow rotating platform 13 and the laser head 10. The fixing plate 16 is "L"-shaped. The horizontal section 17 of the fixing plate 16 is fixedly connected to the upper side of the hollow rotating platform 13. The vertical section 18 of the fixing plate 16 is used to be fixedly connected to the outer cylinder of the slip ring 14. The vertical section 18 is also used to connect to an external robot.

[0024] The method of using the utility model is:

[0025] 1. Start the chiller to send cooling water to the cladding head 11 to extend the service life of the laser nozzle.

[0026] 2. Place the workpiece and adjust the inner hole surface to be processed to the quasi-laser focus position.

[0027] 3. Start the servo motor, and drive the cladding head 11 to start rotating through the reducer 15 and the hollow rotating platform 13 until the cladding of the workpiece is completed.

[0028] 4. Start the powder feeder and deliver the powder to the laser focus position of the cladding head 11 through the powder delivery pipeline.

[0029] 5. Start the compressed air and send it to the protective lens position of the cladding head 11 through the air supply pipeline to reduce the impact of splashes and smoke.

[0030] 6. Start the laser head 10 to generate a laser beam. The laser beam is transmitted through the air along the hollow inner cavity of the laser head 10 and the hollow inner cavity of the slip ring 14, and then transmitted to the focal position of the laser beam spot through the collimating lens, focusing lens, copper reflector and protective lens of the cladding head 11 to complete the powder cladding.

[0031] For the inner hole surface of a non-rotating body, that is, a hole without a symmetry axis, such as the cylinder block of a 4-cylinder engine or the inner hole of a large component, the part cannot rotate, and the cladding equipment can only rotate to complete the uniform cladding inside the hole. Therefore, the utility model can be used to process the inner hole surface of a non-rotating body.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotatable laser cladding device, characterized in that: The invention comprises a coaxially arranged laser head (10) and a cladding head (11), and a rotating mechanism (12) connecting the laser head (10) and the cladding head (11), wherein the axis of the rotating mechanism (12) coincides with the axis of the laser head (10); the rotating mechanism (12) is used to drive the cladding head (11) to rotate 360 ​​degrees at a low speed without dead angles, thereby cladding the workpiece; The rotating mechanism (12) comprises: A hollow rotating platform (13), wherein the upper side of the rotating disk of the hollow rotating platform (13) is connected to the laser head (10) via an optical fiber connector, and the side of the rotating disk of the hollow rotating platform (13) is connected to a servo motor via a reducer (15); A slip ring (14), the upper side of which is fixedly connected to the lower side of the turntable of the hollow rotating platform (13) via a flange, and the slip ring (14) is provided with a plurality of inlets and a plurality of outlets; each of the inlets and outlets is used to communicate with external material equipment, and then each material is sequentially conveyed to the end of the cladding head (11) through the channel of the slip ring (14) and the material channel of the cladding head (11) for cladding; The slip ring (14) is used to drive the inner cylinder of the slip ring (14) to rotate through the hollow rotating platform (13) under the drive of the servo motor, thereby driving the cladding head (11) to rotate.

2. A rotatable laser cladding device according to claim 1, characterized in that: The slip ring (14) is provided with seven inlets and seven outlets to form seven channels, wherein the seven channels are respectively four powder channels, one protective gas channel, one water inlet channel and one water return channel.

3. The rotatable laser cladding device according to claim 1, characterized in that: A fixing plate (16) is fixedly connected between the hollow rotating platform (13) and the laser head (10); the fixing plate (16) is L-shaped, and its horizontal section (17) is fixedly connected to the upper side of the hollow rotating platform (13); its vertical section (18) is used to be fixedly connected to the outer cylinder of the slip ring (14); and the vertical section (18) is also used to connect to an external robot.

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