A laser spraying surface micro-additive device

Abstract

The present invention relates to the technical field of laser coaxial powder feeding, and discloses a laser spraying surface micro-additive device, which includes a nozzle, a powder feeding connector, a substrate and a spraying point. A powder feeding connector is fixedly installed on the outer side of the nozzle, a substrate is placed on the outer side of the powder feeding connector, a spraying point is arranged on the outer surface of the substrate, a protection mechanism is fixedly installed inside the nozzle, a high-pressure gas generator is fixedly connected to the outer side of the nozzle, and a first jet end of the high-pressure gas generator is communicated with the nozzle for jetting high-pressure gas into the inside of the nozzle. In the operation of this laser coaxial powder feeding spraying device, through the provided fastening assembly and the cooperatively arranged connection structure, when in use, the nozzle moves towards the powder feeding connector, pushing the movement of the connection structure. Due to the mutual attraction between the second magnetic block and the first magnetic block, the insertion block is engaged with the groove, thereby realizing the automatic fixation between the nozzle and the powder feeding connector.

Description

Technical Field

[0001] The invention belongs to the technical field of laser coaxial powder feeding, and particularly relates to a laser spraying surface micro-additive device. Background Technique

[0002] Micro-additive on the product surface means the process of spraying on the product surface using a spraying device. As a mature and stable technology, laser spraying technology can better meet the spraying requirements of the product surface;

[0003] Laser thermal spraying technology can create a special working surface on the surface of ordinary materials to achieve a series of functions such as anti-corrosion and wear resistance, high-temperature oxidation resistance, and conductivity. Supersonic laser spraying is based on laser spraying technology, with compressed gas as the acceleration medium. The spraying powder collides with the substrate surface at an ultra-high speed under the action of compressed gas. The substrate surface and the spraying powder simultaneously undergo plastic deformation. At the same time, the spraying powder and the substrate undergo thermal softening under the action of laser radiation, and a metallurgical-bonded surface coating is quickly formed. In order to ensure the spraying efficiency, high-speed laser spraying is often used, which has high metallurgical bonding efficiency, high coating density, and strong bonding degree between the spraying powder and the substrate;

[0004] Existing high-speed laser spraying equipment mainly includes five parts: a laser, a mechanical numerical control device, a powder feeding device, a water chiller, and a high-pressure gas generator. Among them, the powder feeding device controls the spraying powder flow rate, movement path, and speed, and is the core component of the entire set of equipment. The spraying device is mainly divided into two types. One is a separate setting of the powder feeding device and the laser head, and the other is an integrated setting of the powder feeding device and the laser head, also known as laser coaxial powder feeding.

[0005] However, when the existing laser coaxial powder feeding spraying device is in use, due to the high-speed airflow inside the nozzle impacting the inner cavity of the nozzle, it will cause damage to the inner cavity of the nozzle, reduce the service life of the nozzle, and increase the use cost; at the same time, when the high-speed airflow runs unstably, it will cause shaking between the nozzle and the powder feeding connector, resulting in the separation between the nozzle and the powder feeding connector, leading to engineering accidents and being not conducive to the long-term use of the high-speed laser spraying device. Summary of the Invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a laser spraying surface micro-additive device, which effectively solves the problems raised in the above background technique.

[0007] To achieve the above object, the present invention provides the following technical solution: A laser spraying surface micro-additive device, including a nozzle, a powder feeding connector, a substrate and a spraying point. A powder feeding connector is fixedly installed on the outside of the nozzle. A substrate is placed on the outside of the powder feeding connector. A spraying point is arranged on the outer surface of the substrate. A protection mechanism is fixedly installed inside the nozzle. A high-pressure gas generator is fixedly connected to the outside of the nozzle. The first spraying end of the high-pressure gas generator is communicated with the nozzle for spraying high-pressure gas into the inside of the nozzle. A laser head is fixedly installed at one end of the high-pressure gas generator and located inside the nozzle. A connection structure is movably connected to the inner wall of the nozzle, and the connection structures are evenly distributed on the inner wall of the nozzle. A connection port is opened on the inner wall of the powder feeding connector for the communication between the powder feeding connector and the nozzle;

[0008] A powder feeding channel is opened on the inner wall of the powder feeding connector and distributed circumferentially on the powder feeding connector for injecting spraying powder. The powder feeding channels are evenly distributed on the inner wall of the powder feeding connector. A clamping groove is opened on the inner wall of the powder feeding connector and close to the inside of the protection mechanism. A high-pressure air hole is opened on the inner wall of the powder feeding connector and close to the outside of the powder feeding channel for guiding high-pressure gas. The high-pressure air holes are evenly distributed on the inner wall of the powder feeding connector. A first high-pressure air nozzle is fixedly installed at the end of the high-pressure air hole on the inner wall of the powder feeding connector. A fastening component is movably connected to the outside of the connection structure on the inner wall of the powder feeding connector. The fastening component is clamped with the connection structure for fixing the nozzle and the powder feeding connector. A shock absorption component is movably connected to the outside of the fastening component on the inner wall of the powder feeding connector. The shock absorption component is connected to an air gun through a connecting hose.

[0009] Preferably, the first high-pressure air nozzle is communicated with the second spraying end of the high-pressure gas generator. When the first high-pressure air nozzle is opened, the second spraying end of the high-pressure gas generator will spray gas into the inside of the high-pressure air hole.

[0010] Preferably, the protection mechanism includes a protection block and a plug-in block. The plug-in block is clamped inside the clamping groove. The protection block is fixedly connected to the outside of the plug-in block.

[0011] Preferably, the structure of the protection block is an annular structure, the structure of the plug-in block is a cylindrical structure, and the size of the plug-in block matches the size of the clamping groove.

[0012] Preferably, the connection structure includes a connection groove, a connecting rod, a slider, a first magnet, a limiting groove and a limiting block. A connection groove is formed in the inner wall of the nozzle. A limiting block is elastically connected to the inner side of the connection groove. A slider is fixedly installed on the outer side of the limiting block. A limiting groove is formed in the inner wall of the slider. A first magnet is fixedly connected to the inner wall of the slider and near the inner side of the limiting groove. A connecting rod is fixedly connected to the outer side of the slider and penetrates through the inner wall of the nozzle.

[0013] Preferably, the slider fits with the inner wall of the connection groove, and the connection groove is used to limit the movement of the slider.

[0014] Preferably, the fastening assembly includes a through groove, a pull rod, an insertion block and a second magnet. A through groove is formed in the inner wall of the powder feeding connector. An insertion block is elastically connected to the inner side of the through groove. A second magnet is fixedly connected to the inner wall of the insertion block. A pull rod is fixedly connected to the outer side of the insertion block and penetrates through the inner wall of the powder feeding connector.

[0015] Preferably, the size of the insertion block matches the size of the limiting groove. The insertion block is clamped with the limiting groove to fix the nozzle and the powder feeding connector. The opposite surfaces of the second magnet and the first magnet have opposite magnetic polarities, and the second magnet is used to attract the first magnet.

[0016] Preferably, the shock absorption assembly includes a pneumatic groove, a limiting groove, a piston block, a limiting stop block and a second high-pressure air nozzle. A pneumatic groove is formed in the inner wall of the powder feeding connector. A limiting groove is formed in the inner wall of the powder feeding connector and on the side of the pneumatic groove. A piston block is elastically connected to the inner side of the pneumatic groove. A limiting stop block is fixedly connected to the side of the piston block and inside the limiting groove. A second high-pressure air nozzle is fixedly installed on the inner wall of the powder feeding connector and near the outer side of the pneumatic groove.

[0017] Preferably, the piston block is made of rubber. The piston block fits with the inner wall of the pneumatic groove. The inside of the pneumatic groove is filled with air. The second high-pressure air nozzle is connected to an air gun through a connecting hose. When the second high-pressure air nozzle is opened, the air gun injects air into the inside of the pneumatic groove through the connecting hose.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1) During operation, through the provided fastening assembly and the coordinated connection structure, when in use, the nozzle moves towards the powder feeding connector, pushing the movement of the connection structure. Due to the mutual attraction between the second magnet and the first magnet, the insertion block is clamped into the groove, thereby realizing the automatic fixation between the nozzle and the powder feeding connector.

[0020] 2) By means of the provided shock absorption component and the cooperatively arranged piston block, when in use, air is injected into the air pressure groove through an air gun, pushing the piston block into contact with the nozzle, relieving the vibration between the nozzle and the powder spraying connector, preventing the separation between the nozzle and the powder feeding connector, avoiding engineering accidents, and being beneficial to the long-term use of the high-speed laser spraying device.

[0021] 3) By means of the provided shock absorption component, under the action of the protection block, the impact of the high-speed air flow on the inner wall of the nozzle is avoided, damage to the inner cavity of the nozzle is avoided, the service life of the nozzle is prolonged, and the use cost is reduced.

[0022] 4) By means of the provided high-pressure air holes, under the guiding and spraying action of the high-pressure air holes, an air flow protection cover is formed outside the high-pressure air holes, preventing the powder from splashing out from the outside of the connection port, and ensuring the powder adhesion quality at the spraying point. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0024] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0025] Figure 2 is a front view structural diagram of the powder feeding connector of the present invention;

[0026] Figure 3 is a sectional structural diagram of the powder feeding connector of the present invention

[0027] Figure 4 is a sectional structural diagram of the nozzle of the present invention;

[0028] Figure 5 is a sectional structural diagram of the powder feeding connector of the present invention;

[0029] Figure 6 is the present invention Figure 4 a partial enlarged structural diagram of part A in;

[0030] Figure 7 is the present invention Figure 4 a partial enlarged structural diagram of part B in;

[0031] Figure 8 is the present invention Figure 5 a partial enlarged structural diagram of part C in;

[0032] Figure 9 is the present invention Figure 5 a partial enlarged structural diagram of part D in.

[0033] In the figure: 1, nozzle; 2, powder feeding connector; 3, substrate; 4, spraying point; 5, protection mechanism; 6, laser head; 7, connection structure; 8, connection port; 9, high-pressure air hole; 10, first high-pressure air nozzle; 11, powder feeding channel; 13, fastening assembly; 12, clamping groove; 14, shock absorption assembly; 51, protection block; 52, insertion block; 71, connection groove; 72, connecting rod; 73, slider; 74, first magnet; 75, limiting groove; 76, limiting block; 131, through groove; 132, pull rod; 133, insertion block; 134, second magnet; 141, air pressure groove; 142, limiting groove; 143, piston block; 144, limiting stop block; 145, second high-pressure air nozzle. Specific implementation mode

[0034] 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 the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0035] Embodiment 1 is given by Figures 1 - 9 This invention includes a laser spraying surface micro-additive device, which includes a nozzle 1, a powder feeding connector 2, a substrate 3 and a spraying point 4. A powder feeding connector 2 is fixedly installed on the outside of the nozzle 1. A substrate 3 is placed on the outside of the powder feeding connector 2. A spraying point 4 is arranged on the outer surface of the substrate 3. A protection mechanism 5 is fixedly installed inside the nozzle 1. The protection mechanism 5 includes a protection block 51 and an insertion block 52. The insertion block 52 is clamped inside the clamping groove 12. The protection block 51 is fixedly connected to the outside of the insertion block 52. The structure of the protection block 51 is an annular structure. The structure of the insertion block 52 is a cylindrical structure. The size of the insertion block 52 matches the size of the clamping groove 12;

[0036] A high-pressure gas generator is fixedly connected to the outer side of the nozzle 1. The first jet end of the high-pressure gas generator is communicated with the nozzle 1 and is used to jet high-pressure gas into the inner side of the nozzle 1. A laser head 6 is fixedly installed at one end of the high-pressure gas generator and located inside the nozzle 1. A connecting structure 7 is movably connected to the inner wall of the nozzle 1. The connecting structure 7 includes a connecting groove 71, a connecting rod 72, a slider 73, a first magnetic block 74, a limiting groove 75 and a limiting block 76. A connecting groove 71 is formed in the inner wall of the nozzle 1. The limiting block 76 is elastically connected to the inner side of the connecting groove 71. The outer side of the limiting block 76 is fixedly installed with the slider 73. The slider 73 fits with the inner wall of the connecting groove 71. The connecting groove 71 is used to limit the movement of the slider 73. A limiting groove 75 is formed in the inner wall of the slider 73. A first magnetic block 74 is fixedly connected to the inner wall of the slider 73 and close to the inner side of the limiting groove 75. The outer side of the slider 73 penetrates through the inner wall of the nozzle 1 and is fixedly connected with the connecting rod 72; and the connecting structure 7 is evenly distributed on the inner wall of the nozzle 1. A connecting port 8 is formed in the inner wall of the powder feeding connector 2. The connecting port 8 is used for the powder feeding connector 2 to be communicated with the nozzle 1.

[0037] Embodiment 2 is given by Figures 1 - 9 A powder feeding channel 11 is formed in the inner wall of the powder feeding connector 2 and distributed circumferentially on the powder feeding connector 2. The powder feeding channel 11 is used for injecting spraying powder. The powder feeding channels 11 are evenly distributed on the inner wall of the powder feeding connector 2. A clamping groove 12 is formed in the inner wall of the powder feeding connector 2 and close to the inner side of the protection mechanism 5. A high-pressure air hole 9 is formed in the inner wall of the powder feeding connector 2 and close to the outer side of the powder feeding channel 11. The high-pressure air hole 9 is used for guiding high-pressure gas. The high-pressure air holes 9 are evenly distributed on the inner wall of the powder feeding connector 2. A first high-pressure air nozzle 10 is optically installed at the end of the high-pressure air hole 9 on the inner wall of the powder feeding connector 2. The first high-pressure air nozzle 10 is communicated with the second jet end of the high-pressure gas generator. When the first high-pressure air nozzle 10 is opened, the second jet end of the high-pressure gas generator will jet gas into the inner side of the high-pressure air hole 9. A fastening component 13 is movably connected to the outer side of the connecting structure 7 on the inner wall of the powder feeding connector 2. The fastening component 13 includes a through groove 131, a pull rod 132, an insertion block 133 and a second magnetic block 134. A through groove 131 is formed in the inner wall of the powder feeding connector 2. The insertion block 133 is elastically connected to the inner side of the through groove 131. The size of the insertion block 133 is matched with the size of the limiting groove 75. The insertion block 133 is clamped with the limiting groove 75 for fixing the nozzle 1 and the powder feeding connector 2. The magnetic property of the second magnetic block 134 is opposite to that of the opposite surface of the first magnetic block 74. The second magnetic block 134 is used to attract the first magnetic block 74. The second magnetic block 134 is fixedly connected to the inner wall of the insertion block 133. The outer side of the insertion block 133 penetrates through the inner wall of the powder feeding connector 2 and is fixedly connected with the pull rod 132;

[0038] The fastening assembly 13 is snap-connected to the connection structure 7 and is used to fix the nozzle 1 and the powder feeding connector 2. A shock absorption assembly 14 is movably connected to the inner wall of the powder feeding connector 2 and near the outer side of the fastening assembly 13. The shock absorption assembly 14 includes an air pressure groove 141, a limiting groove 142, a piston block 143, a limiting block 144, and a second high-pressure air nozzle 145. An air pressure groove 141 is formed in the inner wall of the powder feeding connector 2, and a limiting groove 142 is formed in the inner wall of the powder feeding connector 2 and on the side of the air pressure groove 141. The piston block 143 is elastically connected to the inner side of the air pressure groove 141. The piston block 143 is made of rubber material and fits with the inner wall of the air pressure groove 141. Air is filled in the inner side of the air pressure groove 141. The second high-pressure air nozzle 145 is connected to an air gun through a connecting hose. When the second high-pressure air nozzle 145 is opened, the air gun injects air into the inner side of the air pressure groove 141 through the connecting hose. A limiting block 144 is fixedly connected to the side of the piston block 143 and inside the limiting groove 142. The second high-pressure air nozzle 145 is fixedly installed on the inner wall of the powder feeding connector 2 and near the outer side of the air pressure groove 141. The shock absorption assembly 14 is connected to the air gun through a connecting hose.

[0039] Working principle: During operation, first, the high-speed laser spraying equipment is installed in place, and the nozzle 1 and the powder feeding connector 2 are connected together. The operator inserts the nozzle 1 into the inner side of the powder feeding connector 2. At this time, during the movement of the nozzle 1, it will gradually fit with the inner wall of the powder feeding connector 2. During this process, the connection structure 7 on the inner wall of the nozzle 1 will be subjected to pressure, causing the connecting rod 72 to slide along the inner wall of the nozzle 1 under the action of the pressure. Furthermore, the connecting rod 72 pushes the slider 73 to slide along the inner side of the connection groove 71, causing the limiting block 76 inside the slider 73 to pull the spring inside the connection groove 71 until the nozzle 1 is completely inserted into the inner side of the powder feeding connector 2. At this moment, the first magnetic block 74 and the second magnetic block 134 are in opposite faces. Since the magnetic properties of the opposite faces of the first magnetic block 74 and the second magnetic block 134 are opposite, the first magnetic block 74 attracts the second magnetic block 134 to move. At this time, the insertion block 133 will pull the spring inside the through groove 131, and then the pull rod 132 will move accordingly. At this moment, the insertion block 133 will be snap-connected to the limiting groove 75 on the inner wall of the slider 73. Since the sizes of the limiting groove 75 and the insertion block 133 match, the fixation between the nozzle 1 and the powder feeding connector 2 is realized.

[0040] After completing the connection between the nozzle 1 and the powder feeding connector 2, start the air gun connected to the second high-pressure air nozzle 145, and open the second high-pressure air nozzle 145, so that the air gun sprays gas into the second high-pressure air nozzle 145, increasing the pressure in the pressure groove 141. Then, the piston block 143 is extruded to move inward along the pressure groove 141. At this moment, under the limiting action of the limiting groove 142, the limiting block 144 will move along the limiting groove 142. At this time, the inner side of the pressure groove 141 is filled with a relatively high pressure until the piston block 143 clamps the nozzle 1. When the high-speed air flow is unstable, at this moment, under the clamping action of the piston block 143, the vibration generated between the nozzle 1 and the powder feeding connector 2 will be transmitted to the piston block 143. Under the action of the air pressure filled in the inner side of the pressure groove 141, the piston block 143 will relieve the vibration at the connection between the nozzle 1 and the powder feeding connector 2, prevent the separation between the nozzle 1 and the powder feeding connector 2, prevent engineering accidents, and is beneficial to the long-term use of the high-speed laser spraying device;

[0041] Subsequently, start the high-pressure gas generator outside the nozzle 1, so that the gas injection end of the high-pressure gas generator sprays high-speed air flow into the inner side of the nozzle 1. The high-speed air flow will spray onto the surface of the protection mechanism 5. Under the protection of the protection block 51, it can avoid the impact of the high-speed air flow on the inner wall of the nozzle 1, prevent damage to the inner cavity of the nozzle 1, improve the service life of the nozzle, and reduce the use cost; After the protection mechanism 5 has been used for a long time, disassemble the nozzle 1 from the high-pressure gas generator, hold the protection block 51 with tweezers and pull it, so that the plug-in block 52 is separated from the card slot 12, and then the protection mechanism 5 can be taken out and a brand-new protection mechanism 5 can be replaced;

[0042] While the high-pressure gas generator is working, turn on the laser head 6, so that the laser head 6 emits laser, and the laser irradiates on the spraying point 4 outside the substrate 3 through the connection port 8. At this moment, inject powder into the inner side of the powder feeding channel 11 through the powder feeding device, and at the same time open the first high-pressure air nozzle 10, so that the second injection end connected to the first high-pressure air nozzle 10 sprays high-pressure gas into the inner side of the high-pressure air hole 9;

[0043] At this moment, along with the laser head 6 and the high-speed air flow passing through the connection port 8, and at the same time the powder enters the inner side of the connection port 8 through the powder feeding channel 11. Under the action of the high-speed air flow spraying, the powder in the connection port 8 is sprayed onto the spraying point 4 outside the substrate 3. Under the action of the irradiation energy of the laser head 6, the powder adheres to the spraying point 4. At the same time, under the guiding spraying action of the high-pressure air hole 9, an air flow protection cover is formed to prevent the powder from splashing outside the connection port 8, ensuring the powder adhesion quality of the spraying point 4.

[0044] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser spraying surface micro-additive device, comprising a nozzle (1), a powder feeding connector (2), a substrate (3), and a spraying point (4), characterized in that: A powder feeding connector (2) is fixedly installed on the outer side of the nozzle (1). A substrate (3) is placed on the outer side of the powder feeding connector (2). Spraying points (4) are arranged on the outer surface of the substrate (3). A protection mechanism (5) is fixedly installed inside the nozzle (1). A high-pressure gas generator is fixedly connected to the outer side of the nozzle (1). The first spraying end of the high-pressure gas generator is communicated with the nozzle (1) for spraying high-pressure gas into the inside of the nozzle (1). A laser head (6) is fixedly installed inside the nozzle (1). A connection structure (7) is movably connected to the inner wall of the nozzle (1), and the connection structures (7) are evenly distributed on the inner wall of the nozzle (1). A connection port (8) is formed in the inner wall of the powder feeding connector (2) for the communication between the powder feeding connector (2) and the nozzle (1). A powder feeding channel (11) is formed in the inner wall of the powder feeding connector (2) and is distributed circumferentially of the powder feeding connector (2) for injecting spraying powder. The powder feeding channels (11) are evenly distributed on the inner wall of the powder feeding connector (2). A clamping groove (12) is formed in the inner wall of the powder feeding connector (2) and near the inner side of the protection mechanism (5). The protection mechanism (5) includes a protection block (51) and a plug-in block (52). The plug-in block (52) is clamped inside the clamping groove (12), and the protection block (51) is fixedly connected to the outer side of the plug-in block (52). A high-pressure air hole (9) is formed in the inner wall of the powder feeding connector (2) and near the outer side of the powder feeding channel (11) for guiding high-pressure gas. The high-pressure air holes (9) are evenly distributed on the inner wall of the powder feeding connector (2). A first high-pressure air nozzle (10) is installed at the end of the high-pressure air hole (9) on the inner wall of the powder feeding connector (2). The first high-pressure air nozzle (10) is communicated with the second spraying end of the high-pressure gas generator. A fastening assembly (13) is movably connected to the inner wall of the powder feeding connector (2) and near the outer side of the connection structure (7). The fastening assembly (13) is clamped with the connection structure (7) for fixing the nozzle (1) and the powder feeding connector (2). A shock absorption assembly (14) is movably connected to the inner wall of the powder feeding connector (2) and near the outer side of the fastening assembly (13). The shock absorption assembly (14) is connected to an air gun through a connecting hose. The connection structure (7) includes a connection groove (71), a connecting rod (72), a slider (73), a first magnet (74), a limit groove (75), and a limit block (76). The inner wall of the nozzle (1) is provided with a connection groove (71). The inner side of the connection groove (71) is elastically connected with a limit block (76). The outer side of the limit block (76) is fixedly installed with a slider (73). The inner wall of the slider (73) is provided with a limit groove (75). The inner wall of the slider (73) and near the inner side of the limit groove (75) is fixedly connected with a first magnet (74). The outer side of the slider (73) and penetrating through the inner wall of the nozzle (1) is fixedly connected with a connecting rod (72). The fastening assembly (13) includes an insertion block (133) and a second magnet (134). The insertion block (133) is clamped with the limit groove (75) for fixing the nozzle (1) and the powder feeding connector (2). The magnetic property of the opposite face of the second magnet (134) and the first magnet (74) is opposite. The second magnet (134) is used to attract the first magnet (74).

2. The laser spraying surface micro-additive device according to claim 1, characterized in that: The structure of the protection block (51) is an annular structure. The structure of the insertion block (52) is a cylindrical structure. The size of the insertion block (52) matches the size of the card slot (12).

3. The laser spraying surface micro-additive device according to claim 1, characterized in that: The slider (73) fits with the inner wall of the connection groove (71). The connection groove (71) is used to limit the movement of the slider (73).

4. The laser spraying surface micro-additive device according to claim 1, characterized in that: The fastening assembly (13) includes a through groove (131) and a pull rod (132). The inner wall of the powder feeding connector (2) is provided with a through groove (131). The inner side of the through groove (131) is elastically connected with an insertion block (133). The inner wall of the insertion block (133) is fixedly connected with a second magnet (134). The outer side of the insertion block (133) and penetrating through the inner wall of the powder feeding connector (2) is fixedly connected with a pull rod (132).

5. The laser spraying surface micro-additive device according to claim 4, characterized in that: The size of the insertion block (133) matches the size of the limit groove (75).

6. The laser spraying surface micro-additive device according to claim 4, characterized in that: The shock absorption assembly (14) includes a pneumatic groove (141), a limit groove (142), a piston block (143), a limit stop block (144), and a second high-pressure nozzle (145). The inner wall of the powder feeding connector (2) is provided with a pneumatic groove (141). The inner wall of the powder feeding connector (2) and on the side of the pneumatic groove (141) is provided with a limit groove (142). The inner side of the pneumatic groove (141) is elastically connected with a piston block (143). The side of the piston block (143) and inside the limit groove (142) is fixedly connected with a limit stop block (144). The inner wall of the powder feeding connector (2) and near the outside of the pneumatic groove (141) is fixedly installed with a second high-pressure nozzle (145).

7. The laser spraying surface micro-additive device according to claim 6, characterized in that: The material of the piston block (143) is rubber. The piston block (143) fits against the inner wall of the air pressure groove (141). The inside of the air pressure groove (141) is filled with air. The second high-pressure air nozzle (145) is connected to an air gun through a connecting hose. When the second high-pressure air nozzle (145) is opened, the air gun injects air into the inside of the air pressure groove (141) through the connecting hose.

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