A multi-laser coupling assisted spraying device

Abstract

The present application relates to a kind of multi-laser coupling auxiliary spraying devices, comprising: the fixture platform for placing the workpiece to be repaired;Spraying system is located above the fixture platform, can be moved laterally and spray powder, and it forms spraying area on the surface of the workpiece to be repaired by spraying channel;First three-dimensional laser emission system emits first laser beam to the workpiece to be repaired and the region above it and forms three-dimensional preheating space, the lower end of spraying area is all located in three-dimensional preheating region, the contact surface of three-dimensional preheating space and the workpiece to be repaired is preheating softening zone, and spraying area is all located in preheating softening zone;And second three-dimensional laser emission system emits second laser beam to the surface of the workpiece to be repaired and forms heat treatment zone;First three-dimensional laser emission system and second three-dimensional laser emission system are respectively located at the two sides of spraying system.Compared with prior art, the present application has the advantages of improving the bonding strength between coating and the workpiece to be repaired, improving coating density and uniformity etc..

Description

Technical Field

[0001] The present invention relates to the field of spray repair technology, and in particular to a multi-laser coupling auxiliary spraying 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. Although spraying technology has developed rapidly, it still faces some technical challenges: such as insufficient bonding strength between the coating and the substrate; the bonding 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, enhancing 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 combines the advantages of laser heating and traditional thermal spraying. Using the high energy density of the laser to pre-treat the substrate surface or perform simultaneous auxiliary heating, it effectively improves the bond strength between the coating and the substrate, while also enhancing the coating's density and wear resistance. However, current laser-assisted spraying equipment suffers from shortcomings such as low integration, imprecise control of the heat-affected zone, and the need to dismantle sprayed components for repair. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-laser coupling auxiliary 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, forms a spraying area on the surface of the workpiece to be repaired through a spraying channel;

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

[0010] The second three-dimensional laser emitting system emits a second laser beam to the surface of the workpiece to be repaired to form a heat treatment area.

[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] Further, the multi-laser coupling auxiliary spraying device further comprises:

[0013] A base is provided with a transversely arranged sliding rail;

[0014] A first support, a second support and a third support are arranged on the sliding rail and can move transversely along the sliding rail;

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

[0016] The second support is provided with a second mounting frame which can move up and down and is used for mounting the three-dimensional laser emitting system, and the second mounting frame comprises a first connecting piece which is mounted on the second support and can move up and down, and a first mounting plate which is connected with the first connecting piece and is arranged obliquely, and the angle between the first mounting plate and the normal line of the surface of the workpiece to be repaired is 45°-75°;

[0017] The third support is provided with a third mounting frame which can move up and down and is used for mounting the laser emitting system, and the third mounting frame comprises a second connecting piece which is mounted on the third support and can move up and down, and a second mounting plate which is connected with the second connecting piece and is arranged obliquely, and the angle between the second mounting plate and the normal line of the surface of the workpiece to be repaired is 45°-75°.

[0018] Further, the first connecting piece and the first mounting plate are connected through a first bolt, and the angle adjustment of the first connecting piece and the first mounting plate can be realized by adjusting the first bolt;

[0019] The second connecting piece and the second mounting plate are connected through a second bolt, and the angle adjustment of the second connecting piece and the second mounting plate can be realized by adjusting the second bolt.

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

[0021] The height of the spraying system to the surface of the workpiece to be repaired, the height of the first three-dimensional laser emission system to the surface of the workpiece to be repaired, and the height of the second three-dimensional laser emission 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 150-250 mm ahead of the moving path of the spraying point of the spraying system.

[0023] The irradiation point of the second laser is always located 150-250 mm behind the moving path of the spraying point of the spraying system.

[0024] Further, the irradiation areas of the first laser beam and the second laser beam on the surface of the workpiece to be repaired have overlapping areas, and the center points of the laser irradiation of the first laser beam and the second laser beam are always not in the same position.

[0025] Further, the shape of the spraying area is circular, the shape of the preheating softening area is rectangular, and the shape of the heat treatment area is rectangular.

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

[0027] Further, the spraying channel is in the shape of a circular truncated cone, and 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 area.

[0028] Further, the spraying system comprises:

[0029] a body channel;

[0030] a high-pressure gas supply port connected to one end of the body channel and used for high-pressure gas flow inflow;

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

[0032] and a spraying powder ejection port connected to the other end of the body channel and used for spraying the spraying powder to the surface of the workpiece to be repaired, which is perpendicular to the surface of the workpiece to be repaired.

[0033] Further, the first three-dimensional laser emission system comprises:

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

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

[0036] a first focusing mirror configured to receive and focus the first laser beam from the first total reflection module;

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

[0038] a second laser emitting module configured to emit the second laser beam,

[0039] a second total reflection module configured to reflect the second laser beam;

[0040] a second focusing mirror configured to receive and focus the second laser beam from the second total reflection module;

[0041] Further, the first total reflection module comprises a first total reflection mirror with an adjustable angle in three-dimensional space, and the angle of the first total reflection mirror is changed by-15°~15°.

[0042] The second total reflection module comprises a second total reflection mirror with an adjustable angle in three-dimensional space, and the angle of the second total reflection mirror is changed by-15°~15°.

[0043] The height of the first focusing mirror and the second focusing mirror is adjustable to change the focusing position, so as to adjust the processing position of the laser spot.

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

[0045] Further, the first three-dimensional laser emitting system further comprises a first optical fiber interface connected with the upper computer and the power supply, which is connected with the first laser emitting module and used for transmitting the first laser beam.

[0046] The first three-dimensional laser emitting system further comprises a first control module electrically connected with the first laser emitting module and used for controlling the frequency and wavelength of the first laser beam.

[0047] Further, the second three-dimensional laser emitting system further comprises a second optical fiber interface connected with the upper computer and the power supply, which is connected with the second laser emitting module and used for transmitting the second laser beam.

[0048] The second three-dimensional laser emitting system further comprises a second control module electrically connected with 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 application has the following advantages:

[0050] (1) The application forms a three-dimensional preheating space on the surface of the workpiece to be repaired by the first laser beam of the three-dimensional laser emitting system, and then sprays the spraying particles through the spraying system, so that the spraying channel passes through the three-dimensional preheating space, and the first laser beam is used to heat the spraying particles and the workpiece to be repaired, so that the spraying particles are better combined with the surface of the workpiece to be repaired. The first laser beam moves synchronously with the spraying system, the first laser beam provides local heating, the spraying particles are deposited on the surface of the workpiece to be repaired in a molten state to form a high-density coating, and the second laser beam with high energy, high repetition frequency and high power is used to irradiate the surface of the workpiece to be repaired. The surface is heat treated by the high energy of the second laser beam in an instant, the sprayed area is remelted, the porosity is reduced, the interlayer bonding performance is improved, the coating density and uniformity are improved, and a high-quality processed surface is obtained.

[0051] (2) In the device, the spraying system, the three-dimensional laser emitting system and the laser emitting system work simultaneously, the irradiation point of the first laser beam is always located at the front end of the moving path of the spraying system, and the second laser beam is always located at the rear end of the moving path of the spraying system. The irradiation areas of the first laser beam and the second laser beam on the surface of the workpiece to be repaired have an overlapping area, so that the energy density is larger due to laser coupling in the area, the base material and the spraying particles can be better softened, and the center points of the laser irradiation of the first laser beam and the second laser beam are always not at the same position. This makes the heating area of the repair particles not have a high-energy gathering point, avoids the phenomenon that the repair particles are excessively melted, and further expands the wide domain of the uniform heat field of laser irradiation.

[0052] (3) The spraying system, the three-dimensional laser emitting system and the laser emitting system are combined, the spraying system can move in the horizontal direction and the vertical direction, the three-dimensional laser emitting system can move in the horizontal direction, the longitudinal direction and the vertical direction, and the laser emitting system can move in the horizontal direction, the longitudinal direction and the vertical direction, so that the effective area of laser-assisted heating is high, the spraying of a complex surface is realized, and the heat-affected zone can be customized through double laser coupling control.

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

[0054] Figure 1 Structure diagram of the multi-laser coupling assisted spraying device shown in embodiment 1;

[0055] Figure 2 Structure diagram of the multi-laser coupling assisted spraying device shown in embodiment 1;

[0056] Figure 3 Structure diagram of the multi-laser coupling assisted spraying device shown in embodiment 1;

[0057] Figure 4 Structure diagram of the multi-laser coupling assisted spraying device shown in embodiment 1;

[0058] Figure 5 Structure diagram of the multi-laser coupling assisted spraying device shown in embodiment 1;

[0059] Figure 6 Structure diagram of the multi-laser coupling assisted spraying device shown in embodiment 1;

[0060] Figure 7 Structure diagram of the multi-laser coupling assisted spraying device shown in embodiment 1.

[0061] 1 - the workpiece to be repaired;

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

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

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

[0065] 5 - the fixture platform;

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

[0067] The application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented on the premise of the technical solutions of the application, and detailed implementation modes and specific operation processes are given, but the protection scope of the application is not limited to the following embodiments. In each of the following embodiments or examples, if no specific description is given for the function components or structures, it is indicated that they are all conventional components or conventional structures adopted in the field to realize the corresponding functions.

[0068] It should be noted that in the description of the application, the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0069] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0070] Embodiment 1

[0071] A multi-laser coupling assisted spraying device, as shown in Figures 1-5 , comprising:

[0072] a clamp platform 5 for placing a workpiece to be repaired 1;

[0073] a spraying system 2 above the clamp platform 5, which is transversely movable and sprays powder, and forms a spraying area 21 on the surface of the workpiece to be repaired 1 through a spraying channel 22;

[0074] a first three-dimensional laser emitting system 3 for emitting a first laser beam 33 to the workpiece to be repaired 1 and its upper area and forming a three-dimensional preheating space 31, the lower end of the spraying area 21 is entirely located in the three-dimensional preheating space 31, the contact surface between the three-dimensional preheating space 31 and the workpiece to be repaired 1 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 for emitting a second laser beam 42 to the surface of the workpiece 1 to be repaired and forming a heat treatment zone 41;

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

[0077] Further, the multi-laser coupling auxiliary spraying device further comprises:

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

[0079] A first support 62, a second support 63 and a third support 64 are arranged on the slide rail 61 and can move transversely along the slide rail 61;

[0080] A first mounting frame 65 for mounting the spraying system 2 is arranged on the first support 62 and can move up and down;

[0081] A second mounting frame 66 for mounting the three-dimensional laser emitting system is arranged on the second support 63 and can move up and down, and the second mounting frame 66 comprises a first connecting piece 661 mounted on the second support 63 and can move up and down, and a first mounting plate 662 connected with the first connecting piece 661 and arranged obliquely, wherein an angle between the first mounting plate 662 and a normal line of the surface of the workpiece 1 to be repaired is 45°~75°;

[0082] A third mounting frame 67 for mounting the laser emitting system 4 is arranged on the third support 64 and can move up and down, and the third mounting frame 67 comprises a second connecting piece 671 mounted on the third support 64 and can move up and down, and a second mounting plate 672 connected with the second connecting piece 671 and arranged obliquely, wherein an angle between the second mounting plate 672 and the normal line of the surface of the workpiece 1 to be repaired is 45°~75°.

[0083] In the embodiment, the first connecting piece 661 and the first mounting plate 662 are connected by a first bolt, and the angle adjustment of the first connecting piece 661 and the first mounting plate 662 can be realized by adjusting the first bolt;

[0084] The second connecting piece 671 and the second mounting plate 672 are connected by a second bolt, and the angle adjustment of the second connecting piece 671 and the second mounting plate 672 can be realized by adjusting the second bolt.

[0085] In the embodiment, a ratio of a transverse distance between the spraying system 2 and the first three-dimensional laser emitting system 3 to a transverse distance between the spraying system 2 and the second three-dimensional laser emitting system 4 is 1:1.

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

[0087] In the embodiment, the irradiation point of the first laser beam 33 is always located 200 mm ahead of the moving path of the spraying point of the spraying system 2.

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

[0089] In the embodiment, the first laser beam 33 and the second laser beam 42 have overlapping areas 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 always not in the same position.

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

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

[0092] In the embodiment, the spraying channel 22 is in the shape of a circular truncated cone, and 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 area 32.

[0093] In the embodiment, the spraying system 2 comprises:

[0094] a body channel 23;

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

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

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

[0098] In the embodiment, the spraying powder outlet 26 adopts a powder or wire feeder to ensure stable delivery of coating material, and the flow range is adjustable between 5-50 g / min. The high-pressure airflow supply port 24 gives a high-intensity inert gas flow, and the external air pressure is controllable, which is used to improve the deposition efficiency of the coating material and ensure uniform combination of the coating material with the surface of the workpiece to be repaired. The spraying powder supply port 25 is heated in linkage with the first three-dimensional laser emission system 3 to ensure deposition of the spraying powder in a molten state, avoiding the problems of over-spraying or insufficient melting.

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

[0100] a first laser emission 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 and focusing the first laser beam 33 of the first total reflection module 35;

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

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

[0105] a second total reflection module 44 for reflecting the second laser beam 42;

[0106] a second focusing mirror 45 receiving and focusing the second laser beam 42 of the second total reflection module 44;

[0107] In the embodiment, the first total reflection module 35 comprises a first total reflection mirror 351 with adjustable angle in three-dimensional space, and the angle changes between -15° and 15°.

[0108] The second total reflection module 44 comprises a second total reflection mirror 441 with adjustable angle in three-dimensional space, and the angle changes between -15° and 15°.

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

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

[0111] In the embodiment, the first three-dimensional laser emitting system 3 further comprises a first optical fiber interface 37 connected with the upper computer and power supply, which is connected with the first laser emitting module 34 and used for transmitting the first laser beam 33.

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

[0113] In the embodiment, the second three-dimensional laser emitting system 4 further comprises a second optical fiber interface 46 connected with the upper computer and power supply, which is connected with the second laser emitting module 43 and used for transmitting the second laser beam 42.

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

[0115] In the embodiment, the first laser emitting module 34 and the second laser emitting module 43 both adopt fiber lasers, the output power of which is 150W-1500W, and the wavelength can be adjusted to adapt to different materials.

[0116] In the embodiment, the working principle of the first three-dimensional laser emitting system 3 is as shown in Figure 6 The first laser beam 33 is emitted from the first laser emitting module 34, reflected by the first total reflection mirror 351 to the first focusing mirror 36, focused to the surface of the workpiece 1 to be repaired, and the first control module 38 assists the first laser beam 33 to work, controls the frequency, wavelength, etc. The height of the first focusing mirror 36 is adjustable, which can realize the change of the focusing position, and the adjustment of the height of the first focusing mirror 36 itself is fine adjustment, and the adjustment of the height of the first three-dimensional laser emitting system 3 is coarse adjustment. The working principle of the second three-dimensional laser emitting system 4 is the same.

[0117] In the embodiment, the angle of the first focusing mirror 36 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°-45°.

[0118] The angle of the second focusing mirror 45 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°-45°.

[0119] As shown in Figure 7 The working process of the device in the embodiment for spraying repair of the workpiece to be repaired is as follows:

[0120] The first support 62 is moved to position the spraying powder outlet 26 directly above the workpiece 1 to be repaired, the second support 63 and the third support 64 are moved to adjust the positions of the first three-dimensional laser emitting system 3 and the second three-dimensional laser emitting system 4 so that the distances from the spraying system 2 are equal. The first mounting plate 662 is adjusted to be at an angle of 60° to the normal of the surface of the workpiece 1 to be repaired by adjusting the angle of the first mounting plate 662 to the first connecting piece 661 through the first bolt, and the second mounting plate 672 is adjusted to be at an angle of 60° to the normal of the surface of the workpiece 1 to be repaired by adjusting the angle of the second mounting plate 672 to the second connecting piece 671 through the second bolt. The heights of the spraying system 2, the first three-dimensional laser emitting system 3 and the second three-dimensional laser emitting system 4 are adjusted to be at the same height by the first mounting bracket 65, the second mounting bracket 66 and the third mounting bracket 67.

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

[0122] The preheating softening area 32 is sprayed by the spraying system 2 to form a sprayed area 21 on the surface of the workpiece 1 to be repaired, a spraying channel 22 is formed between the sprayed area 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 by the second three-dimensional laser emitting system 4 to the sprayed area 21 to post-process the sprayed area 21 and form a heat treatment area 41 on the surface of the workpiece 1 to be repaired, the first support 62, the second support 63 and the third support 64 are moved in the same direction, the irradiation point of the first laser beam 33 is always located 200 mm in front of the moving path of the spraying point of the spraying system 2, and the irradiation point of the second laser beam 42 is always located 200 mm behind the moving path of the spraying point of the spraying system 2. 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 an overlapping area, and the center points of the laser irradiation of the first laser beam 33 and the second laser beam 42 are always not at the same position.

[0124] While the application has been described in detail and with reference to specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and changes can be made therein without departing from the spirit of the application. Accordingly, it is intended that all such modifications and changes be included within the scope of the application as claimed.

Claims

1. A multi-laser coupling assisted spray 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) 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 zone (21) is entirely located within the three-dimensional preheating space (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 emission system (3) and the second three-dimensional laser emission system (4) are respectively located on both sides of the spraying system (2); The multi-laser coupling auxiliary spraying device further includes: A base (6), wherein a transversely arranged slide rail (61) is provided on the base (6); A first bracket (62), a second bracket (63), and a third bracket (64) are arranged on the slide rail (61) and can move laterally along the slide rail; The first bracket (62) is provided with a first mounting frame (65) that is movable up and down and is used to mount the spraying system (2); The second bracket (63) is provided with a second mounting bracket (66) that can move up and down and is used to mount the three-dimensional laser emission system, comprising a first connecting member (661) mounted on the second bracket (63) and movable up and down, and a first mounting plate (662) connected to the first connecting member (661) and tilted, wherein the angle between the first mounting plate (662) and the normal to the surface of the workpiece (1) to be repaired is 45° to 75°; The third bracket (64) is provided with a third mounting bracket (67) that can move up and down and is used to mount the laser emission system (4), comprising a second connecting member (671) mounted on the third bracket (64) and movable up and down, and a second mounting plate (672) connected to the second connecting member (671) and tilted, wherein 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°; 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 of ​​the preheating and softening zone (32) and the heat treatment zone (41).

2. A multi-laser coupling assisted spray device according to claim 1, wherein, 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 of the spraying system (2) to the surface of the workpiece (1) to be repaired, the height of the first three-dimensional laser emission system (3) to the surface of the workpiece (1) to be repaired, and the height of the second three-dimensional laser emission system (4) to the surface of the workpiece (1) to be repaired are equal.

3. A multi-laser coupling assisted spray device as claimed in claim 1, wherein, The irradiation point of the first laser beam (33) is always located 150-250 mm ahead of the moving path of the spraying point of the spraying system (2); The irradiation point of the second laser beam (42) is always located 150-250 mm behind the moving path of the spraying point of the spraying system (2).

4. 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 always not in the same position.

5. A multi-laser coupling assisted spray device as claimed in claim 1, wherein, The spraying channel (22) is in the shape of a circular 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 area (32).

6. A multi-laser coupling assisted spray device as claimed in claim 1, wherein, The spraying system (2) comprises: a body channel (23); a high-pressure gas flow supply port (24) connected to one end of the body channel (23) and used for the inflow of high-pressure gas flow; a spraying powder supply port (25) connected to the side wall of the body channel (23) and used for the feeding of spraying powder; and a spraying powder ejection port (26) connected to the other end of the body channel (23) and used for spraying the spraying powder to the surface of the workpiece (1) to be repaired, which is perpendicular to the surface of the workpiece (1) to be repaired.

7. A multi-laser coupling assisted spray device as claimed in claim 1, wherein, The first three-dimensional laser emission system (3) comprises: a first laser emission 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) receiving the first laser beam (33) of the first total reflection module (35) and focusing it; The second three-dimensional laser emission system (4) comprises: a second laser emission module (43) for emitting the second laser beam (42), a second total reflection module (44) for reflecting the second laser beam (42); a second focusing mirror (45) receiving the second laser beam (42) of the second total reflection module (44) and focusing it.

8. A multi-laser coupling assisted spray device as claimed in claim 7, wherein, The first total reflection module (35) comprises a first total reflection mirror (351) with adjustable angle in three-dimensional space; The second total reflection module (44) comprises a second total reflection mirror (441) with adjustable angle in three-dimensional space; The height of the first focusing mirror (36) and the second focusing mirror (45) is adjustable.

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