A multifunctional laser cladding device

Abstract

The present invention discloses a multi-functional laser cladding device, which includes a three-beam laser cladding nozzle, a laser, and a wire feeding device. The laser sends a laser beam into the three-beam laser cladding nozzle through an optical fiber. The three-beam laser cladding nozzle generates three beams that are projected below the wire nozzle of the three-beam laser cladding nozzle. The wire feeding device feeds the cladding wire into the laser cladding nozzle, and the cladding wire is ejected from the wire nozzle and enveloped by the light spot. A robotic arm connection device is arranged on the laser cladding nozzle, and the robotic arm connection device is connected to a robotic arm through a quick-release interface; a holding handle is also fixed on the laser cladding nozzle, and a control switch for controlling the start and stop of the laser and the wire feeding device is arranged on the holding handle. The laser cladding nozzle is suspended on a fixing device. The cladding device of the present invention can freely switch between the two functions of laser welding and laser cladding. One device can achieve two functions, improving the use efficiency of the device.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser cladding, and particularly relates to a laser cladding device. Background Art

[0002] Laser cladding (also known as laser cladding or laser coating) is a new surface modification technology. It forms a metallurgical-bonded filler cladding layer on the surface of the substrate by adding a cladding material to the surface of the substrate and using a high-energy-density laser beam to melt and solidify it together with a thin layer of the substrate surface.

[0003] Characteristics of laser cladding: The dilution rate of the cladding layer is low but the bonding strength is high, showing a metallurgical bond with the substrate, which can significantly improve the wear resistance, corrosion resistance, heat resistance, oxidation resistance or electrical properties of the substrate material surface, so as to achieve the purpose of surface modification or repair, save a large amount of material costs while meeting the specific performance requirements of the material surface. Compared with traditional surface treatment technologies such as surfacing, thermal spraying, and electroplating, it has many advantages, such as a wide range of applicable material systems, controllable dilution rate of the cladding layer, metallurgical bond between the cladding layer and the substrate, small thermal deformation of the substrate, and easy automation of the process.

[0004] From the current application situation of laser cladding, it is mainly applied in three aspects: 1. Surface modification of materials, such as gas turbine blades, rolling mills, gears, etc. 2. Surface repair of products, such as rotors, molds, etc. 3. Laser additive manufacturing, through the method of synchronous powder feeding or wire feeding, layer-by-layer laser cladding is carried out to obtain three-dimensional-structured parts. Since the 1980s, laser cladding technology has received extensive attention at home and abroad and has been applied in many industrial fields.

[0005] The functional advantages of laser cladding devices are very obvious, but in many application scenarios, laser manual welding still needs to be used to complete the welding of parts. However, at present, laser manual welding devices or laser cladding devices on the market all independently implement their respective functions. Laser manual welding requires a welding torch to complete the welding of parts, and laser cladding requires a manipulator to achieve the cladding forming of workpieces. It is impossible to simultaneously realize the simultaneous operation of laser manual welding and laser cladding. On the market, two functions are realized by independent devices, which have high costs, large equipment occupancy space, low equipment utilization rate, and cannot achieve multi-functional use of one machine. Summary of the Invention

[0006] To overcome the deficiencies in the prior art, the purpose of the present invention is to provide a multi-functional laser cladding device that can freely switch between two functions of laser welding and laser cladding forming, improving the use efficiency of the equipment.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A multi-functional laser cladding device, comprising a three-beam laser cladding nozzle, a laser and a wire feeding device. The laser sends a laser beam into the three-beam laser cladding nozzle through an optical fiber. The three-beam laser cladding nozzle generates three beams that are projected below the wire nozzle of the three-beam laser cladding nozzle and form a light spot on the workpiece. The wire feeding device feeds the cladding wire into the three-beam laser cladding nozzle. The cladding wire is ejected from the wire nozzle and is enveloped by the light spot. A robotic arm connecting device is arranged on the three-beam laser cladding nozzle. The robotic arm connecting device is connected to a robotic arm through a quick-release interface. The robotic arm and the three-beam laser cladding nozzle form a laser cladding device; a holding handle is also fixed on the three-beam laser cladding nozzle. A control switch for controlling the start and stop of the laser and the wire feeding device is arranged on the holding handle. The holding handle and the three-beam laser cladding nozzle form a laser welding device.

[0009] Furthermore, the three-beam laser cladding nozzle is suspended on a fixing device. A straightening wheel device is arranged between the wire feeding device and the three-beam laser cladding nozzle. The cladding wire between the wire feeding device and the three-beam laser cladding nozzle passes through the straightening wheel device.

[0010] The basic working principle of the present invention is as follows:

[0011] When laser cladding forming needs to be realized, the three-beam laser cladding nozzle of the present invention is fixed on the robotic arm through the robotic arm connecting device, and the robotic arm realizes the motion control of the three-beam laser cladding nozzle, and the laser cladding forming work is realized through intelligent control; when laser welding needs to be realized, the three-beam laser cladding nozzle of the present invention is separated from the control of the robotic arm, and the three-beam laser cladding nozzle is manually operated through the holding handle, and the laser projection and wire feeding are controlled through the control switch, so as to realize the function of handheld laser wire feeding welding.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention adds an operating handle and a switch button to the existing cladding nozzle. By connecting the laser, handheld laser wire feeding welding can be realized; when laser cladding forming is needed, the connection between the robotic arm and the three-beam laser cladding nozzle is realized through the robotic arm connecting device, and the robotic arm realizes the motion control of the three-beam laser cladding nozzle, and the laser cladding forming work is realized; one device can realize two functions, improving the utilization rate of the device.

[0014] The connection between the robotic arm connecting device of the present invention and the robotic arm is realized through a quick-release interface, which improves the operation efficiency of the connection and separation between the three-beam laser cladding nozzle and the robotic arm, and further increases the convenience of switching between manual welding and laser cladding functions.

[0015] The straightening wheel device provided between the wire feeding device and the three-beam laser cladding nozzle in the present invention can effectively adjust the bending degree of the cladding wire when it enters the three-beam laser cladding nozzle, ensuring a certain straightening effect of the cladding wire. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the multifunctional laser cladding device of the present invention.

[0017] Figure 2 It is a cross-sectional view of the laser cladding nozzle part when the present invention is used as a handheld laser welding device.

[0018] Figure 3 It is a schematic structural diagram of the straightening wheel device according to an embodiment of the present invention.

[0019] Figure 4 It is a cross-sectional view of the straightening wheel device according to an embodiment of the present invention at a certain group of ball layouts. Detailed Description of the Invention

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 a limitation to the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] See Figure 1As shown in the figure, a multi-functional laser cladding device includes a three-beam laser cladding nozzle 1, a laser 6, and a wire feeding device 7. The laser 6 sends a laser beam 601 into the three-beam laser cladding nozzle 1 through an optical fiber. The three-beam laser cladding nozzle 1 generates three beams 602 that are projected below the wire nozzle 101 of the three-beam laser cladding nozzle 1 and form a light spot on the workpiece. The wire feeding device 7 feeds a cladding wire 701 into the three-beam laser cladding nozzle 1. The cladding wire 701 is ejected from the wire nozzle 102 and is enveloped by the light spot. A robotic arm connecting device 8 is provided on the three-beam laser cladding nozzle 1. The robotic arm connecting device 8 is connected to a robotic arm 4 through a quick-release interface 801. The robotic arm and the three-beam laser cladding nozzle 1 constitute a laser cladding device; as Figure 2 shown, a holding handle 2 is also fixed on the three-beam laser cladding nozzle 1. A control switch 3 for controlling the start and stop of the laser 6 and the wire feeding device 7 is provided on the holding handle 2. The holding handle 2 and the three-beam laser cladding nozzle 1 constitute a laser welding device..

[0023] Preferably, the three-beam laser cladding nozzle 1 is suspended on a fixing device 5. A rope winding device 501 is arranged inside the fixing device 5. The three-beam laser cladding nozzle 1 is suspended on a rope 502 of the rope winding device 501. The rope winding device 501 can, while suspending the three-beam laser cladding nozzle 1, instantaneously adjust the extension length of the rope 502 along with the displacement of the hand-held operation, facilitating the three-beam laser cladding nozzle 1 to work in different position spaces.

[0024] Furthermore, a straightening wheel device 9 is arranged between the wire feeding device 7 and the three-beam laser cladding nozzle 1. The cladding wire 701 between the wire feeding device 7 and the three-beam laser cladding nozzle 1 passes through the straightening wheel device 10.

[0025] Preferably, referring to Figure 3 shown, the straightening wheel device 9 includes a universal joint bamboo tube 901. A flexible ball retainer 902 is arranged inside the universal joint bamboo tube 901. A set of ball bearings 903 is arranged at regular intervals on the flexible ball retainer 902. There are through holes left between a set of the ball bearings 903. The cladding wire 701 passes through the through holes.

[0026] Preferably, referring to Figure 4 shown, a set of the ball bearings 903 includes three. The connecting lines of the centers of the three ball bearings 903 form an equilateral triangle.

[0027] Through actual operation, it is found that when the multi-functional laser cladding device of this embodiment is repeatedly applied to manual laser welding, after the high-frequency "irregular" displacement of the three-beam laser cladding nozzle 1, the cladding wire 701 is greatly distorted. When the cladding wire enters the three-beam laser cladding nozzle 1 in a straight state, it is more conducive to the laser cladding working process. Therefore, it is necessary to timely adjust the bending degree of the cladding wire. The correction wheel device 9 of this embodiment can be adjusted in any direction through the universal bamboo joint tube 901 to correct the bending degree of the cladding wire. Since the cladding wire 701 realizes rolling friction through the ball 903, when the universal bamboo joint tube 901 has an angle, it will not cause sliding friction between the wire and the pipe wall to wear the wire.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multifunctional laser cladding device, comprising a three-beam laser cladding nozzle (1), a laser (6) and a wire feeding device (7). The laser (6) sends a laser beam into the three-beam laser cladding nozzle (1) through an optical fiber. The three-beam laser cladding nozzle (1) generates three beams that are projected below the wire nozzle (101) of the three-beam laser cladding nozzle (1) and form a light spot on the workpiece. The wire feeding device (7) feeds a cladding wire (701) into the laser cladding nozzle (1). The cladding wire (701) is ejected from the wire nozzle (101) and is enveloped by the light spot. It is characterized in that: A robotic arm connection device (8) is provided on the laser cladding spray head (1). The robotic arm connection device (8) is connected to a robotic hand (4) through a quick-release interface (801). The robotic hand and the three-beam laser cladding spray head (1) form a laser cladding device; A holding handle (2) is also fixed on the laser cladding spray head (1). A control switch (3) for controlling the start and stop of the laser (6) and the wire feeding device (7) is provided on the holding handle (2). The holding handle (2) and the three-beam laser cladding spray head (1) form a laser welding device; The three-beam laser cladding spray head (1) is suspended on a fixing device (5). A rope winding device (501) is arranged inside the fixing device (5). The laser cladding spray head (1) is suspended on the rope (502) of the rope winding device (501); A straightening wheel device (9) is arranged between the wire feeding device (7) and the three-beam laser cladding spray head (1). The cladding wire (701) between the wire feeding device (7) and the three-beam laser cladding spray head (1) passes through the straightening wheel device (9); The straightening wheel device (9) includes a universal joint bamboo tube (901). A flexible ball cage (902) is arranged inside the universal joint bamboo tube (901). A set of ball bearings (903) is arranged at a certain distance on the flexible ball cage (902). There are through holes left between a set of the ball bearings (903). The cladding wire (701) passes through the through holes; A set of the ball bearings (903) includes three. The connecting lines of the centers of the three ball bearings (903) form an equilateral triangle.

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