Multi-laser coupling auxiliary spraying device

Abstract

The invention relates to a multi-laser coupling auxiliary spraying device. The multi-laser coupling auxiliary spraying device comprises a clamp platform used for placing a to-be-repaired workpiece; the spraying system is located above the clamp platform, can transversely move and spray powder, and forms a spraying area on the surface of the workpiece to be repaired through a spraying channel; the first three-dimensional laser emitting system emits a first laser beam to the workpiece to be repaired and an area above the workpiece to form a three-dimensional preheating space, the lower end of the spraying area is completely located in the three-dimensional preheating area, the contact face of the three-dimensional preheating area and the workpiece to be repaired is a preheating softening area, and the spraying area is completely located in the preheating softening area; the second three-dimensional laser emitting system is used for emitting a second laser beam on the surface of the workpiece to be repaired and forming a heat treatment area; the first three-dimensional laser emitting system and the second three-dimensional laser emitting system are located on the two sides of the spraying system respectively. Compared with the prior art, the method has the advantages that the bonding strength between the coating and the to-be-repaired workpiece is improved, and the compactness and uniformity of the coating are improved.

Description

Technical Field

[0001] The invention relates to the technical field of spray repair, and in particular to a multi-laser coupling auxiliary spray device. Background Art

[0002] Spraying technology is an important surface engineering technology. It forms a coating with specific properties by spraying the material in a molten or semi-molten state onto the surface of the substrate. This technology is widely used in aerospace, energy, automobile, machinery manufacturing and other fields to improve the wear resistance, corrosion resistance, high temperature oxidation resistance and other surface properties of parts. Despite the rapid development of spraying technology, it still faces some technical challenges: such as insufficient bonding strength between the coating and the substrate; the bonding method between the coating and the substrate mainly relies on mechanical interlocking, which is prone to failure under high load or high temperature environment; there are technical difficulties in achieving uniform coating on complex-shaped substrates, etc. Based on the above technical problems, the spraying field has put forward the following requirements for new technologies: improving the bonding strength between the coating and the substrate, improving the interface bonding performance; optimizing the density and uniformity of the coating, and improving the service life and tolerance of the coating.

[0003] Laser-assisted spraying technology combines the advantages of laser heating and traditional thermal spraying technology. It can effectively improve the bonding strength between the coating and the substrate, and at the same time improve the density and wear resistance of the coating by pre-treating the substrate surface or synchronously assisting heating the substrate through the high energy density of the laser. However, the current laser-assisted spraying equipment has the disadvantages of low integration, imprecise control of the heat-affected zone, and the need to remove the sprayed parts for repair. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-laser coupling assisted spraying device in order to overcome the defects of the above-mentioned prior art. Through multi-laser coupling, part of the laser will soften the repair area to improve the bonding strength between the coating and the workpiece to be repaired, and the other part of the laser will heat treat the sprayed area to improve the density and uniformity of the coating.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A multi-laser coupling auxiliary spraying device, comprising:

[0007] A fixture platform for placing the workpiece to be repaired;

[0008] A spraying system located above the fixture platform, capable of moving laterally and spraying powder, which forms a spraying area on the surface of the workpiece to be repaired through a spraying channel;

[0009] A first three-dimensional laser emitting system that emits a first laser beam to the workpiece to be repaired and the area above it to form a three-dimensional preheating space, wherein the lower end of the spraying zone is entirely located within the three-dimensional preheating zone, the contact surface between the three-dimensional preheating space and the workpiece to be repaired is a preheating softening zone, and the spraying zone is entirely located within the preheating softening zone;

[0010] and a second three-dimensional laser emitting system which emits a second laser beam to the surface of the workpiece to be repaired and forms a heat treatment zone;

[0011] The first three-dimensional laser emitting system and the second three-dimensional laser emitting system are respectively located on both sides of the spraying system.

[0012] Furthermore, the multi-laser coupling auxiliary spraying device also includes:

[0013] A base, wherein a transversely arranged slide rail is arranged on the base;

[0014] A first bracket, a second bracket and a third bracket are arranged on the slide rail and can move laterally along the slide rail;

[0015] The first bracket is provided with a first mounting frame which can move up and down and is used to mount the spraying system;

[0016] The second bracket is provided with a second mounting frame which can move up and down and is used to mount the three-dimensional laser emission system, including a first connecting member which is mounted on the second bracket and can move up and down, and a first mounting plate which is connected to the first connecting member and is tilted, and the angle between the first mounting plate and the normal line of the surface of the workpiece to be repaired is 45° to 75°;

[0017] The third bracket is provided with a third mounting frame which can be moved up and down and is used to install the laser emission system, and the third mounting frame includes a second connecting member which is installed on the third bracket and can be moved up and down, and a second mounting plate which is connected to the second connecting member and is tilted, and the angle between the second mounting plate and the normal of the surface of the workpiece to be repaired is 45° to 75°.

[0018] Furthermore, the first connecting member and the first mounting plate are connected by a first bolt, and the angle between the first connecting member and the first mounting plate can be adjusted by adjusting the first bolt;

[0019] The second connecting member and the second mounting plate are connected via a second bolt, and the angle between the second connecting member and the second mounting plate can be adjusted by adjusting the second bolt.

[0020] Further, the ratio of the lateral distance between the spraying system and the first three-dimensional laser emitting system and the lateral distance between the spraying system and the second three-dimensional laser emitting system is 1:0.5-2, preferably 1:1;

[0021] The height from the spraying system to the surface of the workpiece to be repaired, the height from the first three-dimensional laser emitting system to the surface of the workpiece to be repaired, and the height from the second three-dimensional laser emitting system to the surface of the workpiece to be repaired are equal.

[0022] Further, the irradiation point of the first laser beam is always located 150 to 250 mm from the front end of the moving path of the spraying point of the spraying system;

[0023] The irradiation point of the second laser is always located 150 to 250 mm from the rear end of the moving path of the spraying point of the spraying system.

[0024] Furthermore, the irradiation area of ​​the first laser beam and the second laser beam on the surface of the workpiece to be repaired has an overlapping area, and the center points of the laser irradiation of the first laser beam and the second laser beam are not always in the same position.

[0025] Further, the spraying zone is circular in shape, the preheating and softening zone is rectangular in shape, and the heat treatment zone is rectangular in shape;

[0026] The preheating and softening zone and the heat treatment zone have an overlapping area, and the spraying zone is located in the overlapping area of ​​the preheating and softening zone and the heat treatment zone.

[0027] Furthermore, the spraying channel is in the shape of a truncated cone; the three-dimensional preheating space is in the shape of a cube, the bottom surface of which is in contact with the surface of the workpiece to be repaired, forming the preheating softening zone.

[0028] Furthermore, the spraying system comprises:

[0029] Body channel;

[0030] A high-pressure airflow supply port connected to one end of the main body channel and used for high-pressure airflow to flow in;

[0031] a spray powder supply port connected to the side wall of the main body channel and used for feeding spray powder;

[0032] And a spray powder outlet connected to the other end of the main body channel and used for spraying spray powder onto the surface of the workpiece to be repaired, which is perpendicular to the surface of the workpiece to be repaired.

[0033] Furthermore, the first three-dimensional laser emission system includes:

[0034] a first laser emitting module for emitting the first laser beam,

[0035] A first total reflection module for reflecting the first laser beam;

[0036] A first focusing mirror receiving the first laser beam of the first total reflection module and focusing the first laser beam;

[0037] The second three-dimensional laser emission system comprises:

[0038] a second laser emitting module for emitting the second laser beam,

[0039] A second total reflection module for reflecting the second laser beam;

[0040] A second focusing mirror receives the second laser beam of the second total reflection module and focuses the second laser beam.

[0041] Furthermore, the first total reflection module includes a first total reflection mirror with an adjustable angle in three-dimensional space, and the angle thereof varies from -15° to 15°;

[0042] The second total reflection module includes a second total reflection mirror with an adjustable angle in three-dimensional space, and the angle thereof varies from -15° to 15°;

[0043] The heights of the first focusing mirror and the second focusing mirror are adjustable to change the focusing position, thereby adjusting the processing position of the laser spot.

[0044] Furthermore, the angle between the first laser beam and the normal line of the surface of the workpiece to be repaired is 15° to 45°; the angle between the second laser beam and the normal line of the surface of the workpiece to be repaired is 15° to 45°.

[0045] Furthermore, the first three-dimensional laser emission system further includes a first optical fiber interface connected to a host computer and a power supply, which is connected to the first laser emission module and used to transmit the first laser beam;

[0046] The first three-dimensional laser emitting system also includes a first control module electrically connected to the first laser emitting module and used to control the frequency and wavelength of the first laser beam.

[0047] Furthermore, the second three-dimensional laser emission system further includes a second optical fiber interface connected to the host computer and the power supply, which is connected to the second laser emission module and used to transmit the second laser beam;

[0048] The second three-dimensional laser emitting system also includes a second control module electrically connected to the second laser emitting module and used for controlling the frequency and wavelength of the second laser beam.

[0049] Compared with the prior art, the present invention has the following advantages:

[0050] (1) The present invention respectively arranges a three-dimensional laser emitting system and a laser emitting system on both sides of the spraying system, and forms a three-dimensional preheating space on the surface of the workpiece to be repaired through the first laser beam of the three-dimensional laser emitting system, and then sprays spray particles through the spraying system, so that the spraying channel passes through the three-dimensional preheating space, and uses the first laser beam to heat the spray particles and the workpiece to be repaired, so that the spray particles are better combined with the surface of the workpiece to be repaired. The first laser beam moves synchronously with the spraying system, and the first laser beam provides local heating. The spray particles are deposited on the surface of the workpiece to be repaired in a molten state to form a high-density coating; then a high-energy, high-repetition-frequency, high-power second laser beam is irradiated on the surface of the workpiece to be repaired, and the surface is heat treated by the instantaneous high energy of the second laser beam, the spraying area is remelted, the porosity is reduced, and the interlayer bonding performance is improved, so as to improve the density and uniformity of the coating and obtain a high-quality processed surface.

[0051] (2) In the device of the present invention, the spraying system, the three-dimensional laser emitting system, and the laser emitting system work simultaneously, and the irradiation point of the first laser beam is always located at the front end of the moving path of the spraying system; the second laser beam is always located at the rear end of the moving path of the spraying system. The first laser beam and the second laser beam have an overlapping area in the irradiation area of ​​the surface of the workpiece to be repaired. Therefore, the energy density in this area is greater due to laser coupling, which can better soften the substrate and the sprayed particles, and the center points of the laser irradiation of the first laser beam and the second laser beam are not always in the same position. This prevents high energy concentration points from appearing in the heating area of ​​the repaired particles, avoids the phenomenon of excessive melting of the repaired particles, and further expands the wide range of the uniform thermal field of laser irradiation.

[0052] (3) The present invention integrates a spraying system, a three-dimensional laser emitting system, and a laser emitting system, and enables the spraying system to move horizontally and vertically, and the three-dimensional laser emitting system to move horizontally, longitudinally and vertically, and enables the laser emitting system to move horizontally, longitudinally and vertically, so as to achieve a high effective area of ​​laser-assisted heating, thereby realizing spraying of complex curved surfaces, and the heat-affected zone can be customized through dual laser coupling control.

[0053] (4) Spray repair is performed by the multi-laser coupling auxiliary spraying device of the present invention. Compared with the traditional cold spraying device, the bonding strength between the coating and the workpiece to be repaired is improved after laser pretreatment, and the bonding force is increased by 30%-50%; the density of the coating is significantly improved after laser post-treatment, and the porosity is less than 5%; based on laser coupling, the range of the heat-affected zone is reduced by 20%-30%, reducing the thermal damage to the workpiece to be repaired; the overall spraying time efficiency is increased by 15%-30%; the overall bonding rate of the sprayed material is increased by 20%-40%; after the overall spraying is completed, the surface roughness is reduced by 20%-40%. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a structural schematic diagram of the multi-laser coupling auxiliary spraying device shown in Example 1;

[0055] Figure 2 Schematic diagram of the positional relationship among the spraying zone, preheating and softening zone, and heat treatment zone shown in Example 1;

[0056] Figure 3 It is a structural schematic diagram of the base shown in Example 1;

[0057] Figure 4 It is a structural schematic diagram of the spraying system shown in Example 1;

[0058] Figure 5 It is a schematic structural diagram of the first three-dimensional laser emitting system or the second three-dimensional laser emitting system shown in Example 1;

[0059] Figure 6 This is a schematic diagram of the working principle of the first laser emission system shown in Example 1;

[0060] Figure 7 This is a schematic diagram of the operation of the multi-laser coupling assisted spraying device shown in Example 1.

[0061] 1-Workpiece to be repaired;

[0062] 2-spraying system, 21-spraying area, 22-spraying channel, 23-body channel, 24-high-pressure air supply port, 25-spraying powder supply port, 26-spraying powder outlet;

[0063] 3-first three-dimensional laser emission system, 31-three-dimensional preheating space, 32-preheating softening zone, 33-first laser beam, 34-first laser emission module, 35-first total reflection module, 351-first total reflection mirror, 36-first focusing mirror, 37-first optical fiber interface, 38-first control module;

[0064] 4-second three-dimensional laser emission system, 41-heat treatment area, 42-second laser beam, 43-second laser emission module, 44-second total reflection module, 441-second total reflection mirror, 45-second focusing mirror, 46-second optical fiber interface, 47-second control module;

[0065] 5- Fixture platform;

[0066] 6-base, 61-slide rail, 62-first bracket, 63-second bracket, 64-third bracket, 65-first mounting frame, 66-second mounting frame, 661-first connecting member, 662-first mounting plate, 67-third mounting frame, 671-second connecting member, 672-second mounting plate. DETAILED DESCRIPTION

[0067] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments. In the following embodiments or embodiments, if there is no special description of the functional components or structures, it means that they are all conventional components or conventional structures used in the art to achieve the corresponding functions.

[0068] It should be noted that in the description of the present invention, the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate 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.

[0069] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] Example 1

[0071] A multi-laser coupling auxiliary spraying device, such as Figures 1 to 5 As shown, including:

[0072] A fixture platform 5 for placing the workpiece 1 to be repaired;

[0073] A spraying system 2 located above the fixture platform 5 and capable of moving laterally and spraying powder, which forms a spraying area 21 on the surface of the workpiece 1 to be repaired through a spraying channel 22;

[0074] A first three-dimensional laser emitting system 3 emits a first laser beam 33 to the workpiece 1 to be repaired and the area above it to form a three-dimensional preheating space 31, wherein the lower end of the spraying area 22 is entirely located in the three-dimensional preheating area 31, and the contact surface between the three-dimensional preheating space 31 and the workpiece 1 to be repaired is a preheating softening area 32, and the spraying area 21 is entirely located in the preheating softening area 32;

[0075] and a second three-dimensional laser emitting system 4 that emits a second laser beam 42 to the surface of the workpiece 1 to be repaired and forms a heat treatment area 41;

[0076] The first three-dimensional laser emitting system 3 and the second three-dimensional laser emitting system 4 are respectively located on both sides of the spraying system 2 .

[0077] Furthermore, the multi-laser coupling auxiliary spraying device also includes:

[0078] A base 6, on which a transversely arranged slide rail 61 is arranged;

[0079] A first bracket 62, a second bracket 63 and a third bracket 64 which are arranged on the slide rail 6 and can move laterally along the slide rail;

[0080] The first bracket 62 is provided with a first mounting frame 65 which can be moved up and down and is used to mount the spraying system 2;

[0081] The second bracket 63 is provided with a second mounting bracket 66 which can move up and down and is used to mount the three-dimensional laser emitting system, including a first connecting member 661 which is mounted on the second bracket 63 and can move up and down, and a first mounting plate 662 which is connected to the first connecting member 661 and is tilted, and the angle between the first mounting plate 662 and the normal line of the surface of the workpiece 1 to be repaired is 45° to 75°;

[0082] The third bracket 64 is provided with a third mounting frame 67 which can be moved up and down and is used to install the laser emitting system 4. The third mounting frame 67 includes a second connecting member 671 which is installed on the third bracket 64 and can be moved up and down, and a second mounting plate 672 which is connected to the second connecting member 671 and is tilted. The angle between the second mounting plate 672 and the normal of the surface of the workpiece 1 to be repaired is 45° to 75°.

[0083] In this embodiment, the first connecting member 661 and the first mounting plate 662 are connected by a first bolt, and the angle between the first connecting member 661 and the first mounting plate 662 can be adjusted by adjusting the first bolt;

[0084] The second connecting member 671 and the second mounting plate 672 are connected by a second bolt, and the angle between the second connecting member 671 and the second mounting plate 672 can be adjusted by adjusting the second bolt.

[0085] In this embodiment, the ratio of the lateral distance between the spraying system 2 and the first three-dimensional laser emitting system 3 and the lateral distance between the spraying system 2 and the second three-dimensional laser emitting system 4 is 1:1;

[0086] The height from the spraying system 2 to the surface of the workpiece 1 to be repaired, the height from the first three-dimensional laser emitting system 3 to the surface of the workpiece 1 to be repaired, and the height from the second three-dimensional laser emitting system 4 to the surface of the workpiece 1 to be repaired are equal.

[0087] In this embodiment, the irradiation point of the first laser beam 33 is always located 200 mm from the front end of the moving path of the spraying point of the spraying system 2;

[0088] The irradiation point of the second laser 42 is always located 200 mm behind the moving path of the spraying point of the spraying system 2 .

[0089] In this embodiment, the irradiation areas of the first laser beam 33 and the second laser beam 42 on the surface of the workpiece 1 to be repaired have overlapping areas, and the center points of the laser irradiation of the first laser beam 33 and the second laser beam 42 are not always at the same position.

[0090] In this embodiment, the spraying area 21 is circular in shape, the preheating and softening area 32 is rectangular in shape, and the heat treatment area 41 is rectangular in shape;

[0091] The preheating and softening zone 32 and the heat treatment zone 41 have an overlapping area, and the spraying zone 21 is located in the overlapping area between the preheating and softening zone 32 and the heat treatment zone 41 .

[0092] In this embodiment, the spray channel 22 is in the shape of a truncated cone; the three-dimensional preheating space 31 is in the shape of a cube, the bottom surface of which is in contact with the surface of the workpiece 1 to be repaired, forming the preheating softening zone 32.

[0093] In this embodiment, the spraying system 2 includes:

[0094] Body channel 23;

[0095] a high-pressure airflow supply port 24 connected to one end of the main body channel 23 and used for high-pressure airflow to flow in;

[0096] a spray powder supply port 25 connected to the side wall of the main body channel 23 and used for feeding spray powder;

[0097] And a spraying powder outlet 26 connected to the other end of the main body channel 23 and used for spraying spraying powder onto the surface of the workpiece 1 to be repaired, which is perpendicular to the surface of the workpiece 1 to be repaired.

[0098] In this embodiment, the spray powder outlet 26 uses a powder or wire feeder to ensure stable delivery of the coating material, and the flow rate range is adjustable in the range of 5-50g / min. The high-pressure airflow supply port 24 provides a high-intensity inert airflow, and the external air pressure is controllable, which is used to improve the deposition efficiency of the coating material and ensure that the coating material is evenly combined with the surface of the workpiece to be repaired. The spray powder supply port 25 is linked to the first three-dimensional laser heating system 3 for heating, ensuring that the spray powder is deposited in a molten state to avoid overspray or insufficient melting.

[0099] In this embodiment, the first three-dimensional laser emission system 3 includes:

[0100] A first laser emitting module 34 for emitting the first laser beam 33,

[0101] A first total reflection module 35 for reflecting the first laser beam 33;

[0102] A first focusing mirror 36 receiving the first laser beam 33 of the first total reflection module 35 and focusing the first laser beam 33;

[0103] The second three-dimensional laser emission system 4 includes:

[0104] A second laser emitting module 43 for emitting the second laser beam 42,

[0105] A second total reflection module 44 for reflecting the second laser beam 33;

[0106] A second focusing mirror 45 receives the second laser beam 42 of the second total reflection module 44 and focuses the second laser beam 42 .

[0107] In this embodiment, the first total reflection module 35 includes a first total reflection mirror 351 whose angle is adjustable in three-dimensional space, and the angle thereof varies from -15° to 15°;

[0108] The second total reflection module 44 includes a second total reflection mirror 441 whose angle is adjustable in three-dimensional space, and the angle thereof varies from -15° to 15°;

[0109] The heights of the first focusing mirror 36 and the second focusing mirror 45 are adjustable to change the focusing position, thereby adjusting the processing position of the laser spot.

[0110] In this embodiment, the angle between the first laser beam 33 and the normal line of the surface of the workpiece 1 to be repaired is 15° to 45°; the angle between the second laser beam 42 and the normal line of the surface of the workpiece 1 to be repaired is 15° to 45°.

[0111] In this embodiment, the first three-dimensional laser emission system 3 further includes a first optical fiber interface 37 connected to a host computer and a power supply, which is connected to the first laser emission module 34 and used to transmit the first laser beam 33;

[0112] The first three-dimensional laser emitting system 3 further includes a first control module 38 electrically connected to the first laser emitting module 34 and used for controlling the frequency and wavelength of the first laser beam 33 .

[0113] In this embodiment, the second three-dimensional laser emitting system 4 further includes a second optical fiber interface 37 connected to the host computer and the power supply, which is connected to the second laser emitting module 43 and used to transmit the second laser beam 42;

[0114] The second three-dimensional laser emitting system 4 further includes a second control module 47 electrically connected to the second laser emitting module 43 and used for controlling the frequency and wavelength of the second laser beam 42 .

[0115] In this embodiment, both the first laser emitting module 34 and the second laser emitting module 44 use fiber lasers with an output power of 150W-1500W and an adjustable wavelength to suit different materials.

[0116] In this embodiment, the working principle of the first three-dimensional laser emission system 3 is as follows: Figure 6 As shown, the first laser beam 33 is emitted from the first laser emission module 34, reflected by the first total reflection mirror 351 to reach the first focusing mirror 36, and then focused to reach the surface of the workpiece 1 to be repaired. The first control module 38 assists the first laser beam 33 to work and control the frequency, wavelength, etc. The first focusing mirror 36 is height-adjustable to achieve the change of the focus position. The height adjustment of the first focusing mirror 36 itself is fine adjustment, and the height adjustment of the first three-dimensional laser emission system 3 is rough adjustment. The working principle of the second three-dimensional laser emission system 4 is the same.

[0117] In this embodiment, the angle of the first laser focusing lens 37 is adjustable, so that the angle between the first laser beam 33 and the normal line of the surface of the workpiece 1 to be repaired is 15° to 45°;

[0118] The angle of the second laser focusing lens 46 is adjustable so that the angle between the second laser beam 42 and the normal line of the surface of the workpiece 1 to be repaired is 15° to 45°.

[0119] like Figure 7 As shown, the device in this embodiment is used to spray repair the workpiece to be repaired, and the working process is as follows:

[0120] The spray powder outlet 26 is positioned directly above the workpiece 1 to be repaired by moving the first bracket 62, and the positions of the first three-dimensional laser emitting system 3 and the second three-dimensional laser emitting system 4 are adjusted by moving the second bracket 63 and the third bracket 64, so that the distances between the two and the spray system 2 are equal. The angle between the first mounting plate 662 and the first connecting plate 661 is adjusted by the first bolt, and the angle between the second mounting plate 672 and the first connecting plate 671 is adjusted by the second bolt, so that the angle between the first mounting plate 662 and the normal line of the surface of the workpiece 1 to be repaired is 60°, and the angle between the second mounting plate 672 and the normal line of the surface of the workpiece 1 to be repaired is 60°. The heights of the spray system 2, the first three-dimensional laser emitting system 3, and the second three-dimensional laser emitting system 4 are adjusted by the first mounting bracket 65, the second mounting bracket 66, and the third mounting bracket 67, so that the three are located at the same height.

[0121] The workpiece 1 to be repaired is fixed on the fixture platform 5, and the first laser beam 33 is emitted to the workpiece 1 to be repaired and the area above it through the three-dimensional laser emitting system 3 to form a three-dimensional preheating space 31. The contact surface between the three-dimensional preheating space 31 and the surface of the workpiece 1 to be repaired is a preheating softening zone 32; the first laser beam 33 scans the surface of the workpiece 1 to be repaired to remove surface microscopic defects, reduce the surface hardness of the workpiece 1 to be repaired, and improve the adhesion of the enhanced spraying material.

[0122] The preheating softening zone 32 is sprayed with powder by the spraying system 2 to form a spraying zone 21 on the surface of the workpiece 1 to be repaired, a spraying channel 22 is formed between the spraying zone 21 and the spraying system 2, and the spraying channel 22 passes through the three-dimensional preheating space 31.

[0123] The second laser beam 42 is emitted to the spraying area 22 by the laser emission system 4, so that the spraying area 22 is post-processed, and a post-processing area 41 is formed on the surface of the workpiece 1 to be repaired, so that the first bracket 62, the second bracket 63, and the third bracket 64 move in the same direction, so that the irradiation point of the first laser beam 33 is always located at the front 200mm of the moving path of the spraying point of the spraying system 2, and the irradiation point of the second laser 42 is always located at the rear 200mm of the moving path of the spraying point of the spraying system 2. The irradiation area of ​​the first laser beam 33 and the second laser beam 42 on the surface of the workpiece 1 to be repaired has an overlapping area, and the center points of the laser irradiation of the first laser beam 33 and the second laser beam 42 are not always at the same position.

[0124] Although the present invention has been described in detail above by means of general description, specific implementation methods and tests, it is obvious to those skilled in the art that some modifications or improvements may be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A multi-laser coupling assisted spraying device, characterized in that: include: A fixture platform (5) for placing the workpiece (1) to be repaired; A spraying system (2) located above the fixture platform (5) and capable of moving laterally and spraying powder, which forms a spraying area (21) on the surface of the workpiece (1) to be repaired through a spraying channel (22); A first three-dimensional laser emitting system (3) for emitting a first laser beam (33) to the workpiece (1) to be repaired and the area above it to form a three-dimensional preheating space (31), wherein the lower end of the spraying zone (22) is entirely located within the three-dimensional preheating zone (31), the contact surface between the three-dimensional preheating space (31) and the workpiece (1) to be repaired is a preheating softening zone (32), and the spraying zone (21) is entirely located within the preheating softening zone (32); and a second three-dimensional laser emitting system (4) for emitting a second laser beam (42) to the surface of the workpiece (1) to be repaired and forming a heat treatment zone (41); The first three-dimensional laser emitting system (3) and the second three-dimensional laser emitting system (4) are respectively located on both sides of the spraying system (2).

2. A multi-laser coupling auxiliary spraying device according to claim 1, characterized in that: The multi-laser coupling auxiliary spraying device also includes: A base (6), wherein a transversely arranged slide rail (61) is arranged on the base (6); A first bracket (62), a second bracket (65) and a third bracket (66) arranged on the slide rail (6) and capable of moving laterally along the slide rail; The first bracket (62) is provided with a first mounting frame (67) which can be moved up and down and is used to mount the spraying system (2); The second bracket (65) is provided with a second mounting bracket (68) which can move up and down and is used to mount the three-dimensional laser emitting system, comprising a first connecting member (681) mounted on the second bracket (65) and movable up and down, and a first mounting plate (682) connected to the first connecting member (681) and tilted, wherein the angle between the first mounting plate (682) and the normal line of the surface of the workpiece (1) to be repaired is 45° to 75°; The third bracket (66) is provided with a third mounting frame (69) which can be moved up and down and is used to mount the laser emitting system (4), and comprises a second connecting member (691) mounted on the third bracket (66) and can be moved up and down, and a second mounting plate (692) connected to the second connecting member (691) and tilted, wherein the angle between the second mounting plate (692) and the normal line of the surface of the workpiece (1) to be repaired is 45° to 75°.

3. The multi-laser coupling auxiliary spraying device according to claim 1, characterized in that: The ratio of the lateral distance between the spraying system (2) and the first three-dimensional laser emitting system (3) and the lateral distance between the spraying system (2) and the second three-dimensional laser emitting system (4) is 1:0.5-2; The height from the spraying system (2) to the surface of the workpiece (1) to be repaired, the height from the first three-dimensional laser emitting system (3) to the surface of the workpiece (1) to be repaired, and the height from the second three-dimensional laser emitting system (4) to the surface of the workpiece (1) to be repaired are equal.

4. The multi-laser coupling auxiliary spraying device according to claim 1, characterized in that: The irradiation point of the first laser beam (33) is always located 150 to 250 mm from the front end of the moving path of the spraying point of the spraying system (2); The irradiation point of the second laser (42) is always located 150 to 250 mm from the rear end of the moving path of the spraying point of the spraying system (2).

5. The multi-laser coupling auxiliary spraying device according to claim 1, characterized in that: The first laser beam (33) and the second laser beam (42) have an overlapping area in the irradiation area on the surface of the workpiece (1) to be repaired, and the center points of the laser irradiation of the first laser beam (33) and the second laser beam (42) are not always in the same position.

6. The multi-laser coupling auxiliary spraying device according to claim 1, characterized in that: The spraying zone (21) is circular in shape, the preheating and softening zone (32) is rectangular in shape, and the heat treatment zone (41) is rectangular in shape; The preheating and softening zone (32) and the heat treatment zone (41) have an overlapping area, and the spraying zone (21) is located in the overlapping area between the preheating and softening zone (32) and the heat treatment zone (41).

7. The multi-laser coupling auxiliary spraying device according to claim 1, characterized in that: The spraying channel (22) is in the shape of a truncated cone; the three-dimensional preheating space (31) is in the shape of a cube, the bottom surface of which contacts the surface of the workpiece (1) to be repaired, forming the preheating softening zone (32).

8. The multi-laser coupling auxiliary spraying device according to claim 1, characterized in that: The spraying system (2) comprises: Body channel (23); a high-pressure airflow supply port (24) connected to one end of the main body channel (23) and used for the high-pressure airflow to flow in; A spray powder supply port (25) connected to the side wall of the main body channel (23) and used for feeding spray powder; and a spray powder outlet (26) connected to the other end of the main body channel (23) and used for spraying spray powder onto the surface of the workpiece (1) to be repaired, wherein the spray powder outlet (26) is perpendicular to the surface of the workpiece (1) to be repaired.

9. The multi-laser coupling auxiliary spraying device according to claim 1, characterized in that: The first three-dimensional laser emitting system (3) comprises: a first laser emitting module (34) for emitting the first laser beam (33), A first total reflection module (35) for reflecting the first laser beam (33); a first focusing mirror (36) for receiving and focusing the first laser beam (33) from the first total reflection module (35); The second three-dimensional laser emitting system (4) comprises: a second laser emitting module (43) for emitting the second laser beam (42), A second total reflection module (44) for reflecting the second laser beam (33); A second focusing mirror (45) receives the second laser beam (42) from the second total reflection module (44) and focuses it.

10. The multi-laser coupling auxiliary spraying device according to claim 9, characterized in that: The first total reflection module (35) comprises a first total reflection mirror (351) whose angle is adjustable in three-dimensional space; The second total reflection module (44) comprises a second total reflection mirror (441) whose angle is adjustable in three-dimensional space; The heights of the first focusing mirror (36) and the second focusing mirror (45) are adjustable.

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