A device and process for preparing fatigue-resistant metal composite material

Abstract

The present invention belongs to the technical field of composite material preparation and discloses a fatigue-resistant metal composite material preparation device and process thereof, comprising a frame, a coaxial cladding head disposed above the frame for forward and backward movement, two brackets symmetrically and vertically fixedly mounted on the upper surface of the frame, a drive mechanism disposed between the two brackets for driving the movement of the coaxial cladding head, and a group of nozzle holes for spraying cladding material equidistantly formed in the circumferential direction on the bottom end surface of the coaxial cladding head. The present invention, through the coordinated design of the drive mechanism, coaxial cladding head, nozzle holes, and recovery mechanism, achieves the recycling of some of the splashed cladding material, reduces resource waste, improves resource utilization, and improves the practicality of the device, avoiding the problem in the prior art of being difficult to recycle a large amount of splashed cladding material, which is difficult to save resources and reduce the waste of cladding material.

Description

Technical Field

[0001] The invention belongs to the technical field of composite material preparation, in particular to a device for preparing fatigue-resistant metal composite material and a process thereof. Background Art

[0002] Fatigue-resistant metal composites mainly refer to metal matrix composites. Metal matrix composites are composite materials that are artificially combined with metals and their alloys as the matrix and one or more metal or non-metal reinforcements. They are classified according to the type of reinforcement, such as fiber reinforcement, whisker reinforcement and particle reinforcement. Depending on the metal or alloy matrix, metal matrix composites can be divided into aluminum-based, magnesium-based, copper-based, titanium-based, high-temperature alloy-based, intermetallic compound-based and refractory metal-based composites. These materials are widely used in aerospace, automotive, electronics and other fields due to their excellent performance.

[0003] In the existing technology, laser cladding technology is used in the preparation of metal composite materials. Laser cladding technology can be used to prepare continuous fiber-reinforced metal matrix composites. A high-energy laser beam is used to irradiate the surface of the substrate while feeding the cladding material. The high temperature of the laser beam melts the substrate surface and the cladding material, which then quickly solidifies to form a metallurgically bonded coating, thereby obtaining a composite material with excellent performance.

[0004] However, there are still corresponding disadvantages in actual use: when the cladding material is sprayed onto the surface of the substrate, part of the cladding material is not melted in time by the laser beam, and collides with the substrate surface or collides with each other, resulting in splashing, which easily leads to a large amount of resource waste. The traditional laser cladding device used for the preparation of metal composite materials is not convenient for recycling a large amount of splashed cladding material, and is not convenient for saving resources and reducing the waste of cladding materials. Summary of the Invention

[0005] Technical problems solved

[0006] In order to solve the problems raised in the above-mentioned background technology, the present invention provides a fatigue-resistant metal composite material preparation device and process thereof, which has the advantages of convenient operation, recycling of cladding materials, good practicality and resource saving. Through the coordinated design of the drive mechanism, coaxial cladding head, nozzle, recovery mechanism and other structures, part of the splashed cladding material can be recycled, reducing resource waste, improving resource utilization, and at the same time improving the practicality of the device.

[0007] Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solutions: a fatigue-resistant metal composite material preparation device and process thereof, comprising a frame, a coaxial cladding head that moves back and forth is disposed above the frame, two brackets are vertically fixedly mounted symmetrically front and back on the upper surface of the frame, a driving mechanism for driving the coaxial cladding head to move is disposed between the two brackets, a group of nozzle holes for spraying cladding material are equidistantly formed in the circumferential direction on the bottom end surface of the coaxial cladding head, and a recovery mechanism is disposed on the outer surface of the coaxial cladding head;

[0009] The cam is secured to the outer surface of the cam and is secured to the interior of the cam, and has a locking mechanism which allows the cam to lock onto the outer surface of the cam and into the interior of the cam.

[0010] Among them, a laser beam emitter is provided at the upper part of the inner cavity of the coaxial cladding head, a discharge hole connected to the nozzle is opened at the lower part of the inner cavity of the connecting shell, and the upper surface of the connecting shell is connected to a feeding pipe for connecting to the feeding end of the feeding equipment for externally conveying the cladding material.

[0011] In the above technical solution, preferably, the driving mechanism includes a moving block arranged between the two brackets, a screw rod movably installed in the middle of the opposite surfaces of the two brackets through bearings for driving the moving block to move forward and backward, and a driving motor fixed on the outside of one of the brackets for driving the screw rod to rotate; wherein, two stabilizing bars are symmetrically fixed on the left and right sides of the opposite surfaces of the two brackets, and the moving block is slidably connected to the stabilizing bar.

[0012] In the above technical solution, preferably, the transmission mechanism includes two support rods symmetrically arranged on the left and right sides of the outer surface of the mounting shell, a rack fixedly mounted on one side of the support rod close to the outer surface of the mounting shell, and an outer gear ring fixedly sleeved on the outer surface of the annular block; wherein, the outer gear ring is engaged with the rack, and the left and right sides of the outer surface of the mounting shell are slidingly connected to the side walls of the support rod through the connecting blocks provided, and the front and rear ends of the support rod are fixedly connected to the opposite surfaces of the two brackets respectively.

[0013] In the above technical solution, preferably, the transmission member includes an inner gear ring fixedly mounted on the upper part of the inner cavity of the mounting shell and a gear fixedly sleeved on the top of the spiral rod; wherein the gear is engaged with the inner gear ring.

[0014] In the above technical solution, preferably, an annular partition plate is rotatably installed above the annular block in the inner cavity of the mounting shell, and the top end of the spiral rod penetrates above the annular partition plate.

[0015] In the above technical solution, preferably, a support plate is provided at the lower part of the spiral rod through a bearing movable sleeve, and the outer ring wall of the support plate is fixedly connected to the inner cavity of the feed trough.

[0016] In the above technical solution, preferably, a group of diverter baffles are fixedly installed at the inner cavity opening of the aggregate shell at equal distances in the circumferential direction, and the diverter baffle has a larger thickness on the side close to the inner ring of the annular block, and a smaller thickness on the side away from the inner cavity of the annular block.

[0017] In the above technical scheme, preferably, the stress weakening mechanism includes a mounting groove provided at the bottom end of the spiral rod, a sleeve that moves up and down in the inner cavity of the mounting groove, a vertical rod vertically arranged in the inner cavity of the sleeve, an impact block fixed at the bottom end of the vertical rod, a connecting ring sleeved on the lower part of the outer surface of the spiral rod and fixedly connected to the sleeve through a connecting rod, a mounting ring movably sleeved on the outer ring of the connecting ring, and a linkage mechanism provided in the inner cavity of the feed trough and below the annular block for driving the mounting ring to move; wherein, the inner cavity of the sleeve is provided with a reciprocating spiral groove, and a guide block adapted for the inner cavity of the reciprocating spiral groove is fixedly installed on the upper part of the outer surface of the vertical rod, the bottom end of the vertical rod passes through the bottom surface of the annular block, and the outer surface of the vertical rod is slidably connected to the bottom surface of the inner cavity of the feed trough, and the bottom surface of the mounting ring is connected to the bottom surface of the inner cavity of the feed trough by a first spring telescopic rod.

[0018] In the above technical solution, preferably, the linkage mechanism includes a bottom block arranged below the bottom surface of the annular block, two top rods symmetrically and vertically fixed on the upper surface of the bottom block, a linkage rod symmetrically hinged in the inner cavity of the feed trough, and two ball bearings symmetrically and movably installed on the bottom surface of the bottom block; wherein, the top end of the top rod is traditionally extended into the inner cavity of the feed trough, the top end of the top rod is movably connected to one side of the bottom surface of the linkage rod, the other side of the bottom surface of the linkage rod is movably connected to the upper surface of the mounting ring, the upper surface of the bottom block is connected to the bottom surface of the annular block by a second spring telescopic rod, and a through hole is vertically opened in the middle of the bottom block.

[0019] A preparation process of a fatigue-resistant metal composite material comprises the following steps:

[0020] S1: placing a metal substrate on the upper surface of the frame, driving the coaxial cladding head to move back and forth by the driving mechanism, and delivering the cladding material to the nozzle through the feeding pipe by an external feeding device and spraying it on the substrate surface. At the same time, the laser beam emitter in the coaxial cladding head emits a laser beam to melt the substrate surface and the cladding material to form a cladding layer;

[0021] S2: When a part of the unmelted cladding material splashes, it can enter the aggregate shell and enter the inner cavity of the feed trough through the feed port. When the driving mechanism drives the coaxial cladding head to move back and forth, the transmission mechanism can drive the annular block to rotate. The rotation of the annular block drives the spiral rod to move circumferentially. Under the action of the transmission member, the spiral rod can rotate while moving circumferentially. When the spiral rod rotates, it can transport the cladding material entering the feed trough to the inner cavity of the mounting shell. Thereafter, the cladding material enters the inner cavity of the connecting shell through the discharge channel and the one-way valve. When the external feeding device transports the cladding material, the cladding material recovered into the connecting shell can be driven by the feed pipe to be sprayed out again from the nozzle to the surface of the metal substrate for cladding to prepare a metal composite material.

[0022] S3: After rapid cooling, the cladding layer will form a certain thickness. The rotation of the annular block and the circumferential movement of the spiral rod can drive the movement of the stress weakening mechanism. When the stress weakening mechanism interacts with the upper surface of the cladding layer, the spiral rod can activate the stress weakening mechanism under the action of self-rotation to impact the cladding layer. The impact can cause micro-plastic deformation of the material to reduce the residual stress of the cladding layer.

[0023] Beneficial effects

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention adopts the coordinated design of the driving mechanism, the coaxial cladding head, the nozzle hole, the recovery mechanism and other structures. When the part of the unmelted cladding material splashes, it can enter the collecting shell and enter the inner cavity of the feeding trough through the feeding port. When the driving mechanism drives the coaxial cladding head to move back and forth, the annular block can be driven to rotate by the transmission mechanism. The rotation of the annular block drives the spiral rod to move circumferentially. Under the action of the transmission member, the spiral rod can rotate while moving circumferentially. When the spiral rod rotates, the cladding material entering the feeding trough can be transported to the inner cavity of the mounting shell. Then, the cladding material enters the inner cavity of the connecting shell through the discharge channel and the one-way valve. When the external feeding device transports the cladding material, the cladding material recovered in the connecting shell can be driven by the feeding pipe to be sprayed out again from the nozzle hole to the surface of the metal substrate for cladding to prepare a metal composite material. Part of the splashed cladding material can be recycled, resource waste is reduced, resource utilization is improved, and the practicality of the device is improved. It solves the problem that it is inconvenient to recycle a large amount of splashed cladding material in the prior art, and it is not convenient to save resources and reduce the waste of cladding material.

[0026] 2. The present invention adopts the coordinated design of the annular block, the spiral rod, the stress weakening mechanism and other structures. After the cladding layer is rapidly cooled, a certain thickness is formed. When the annular block rotates, it drives the bottom block to rotate circumferentially. When the bottom block rotates circumferentially, the ball at the bottom contacts and squeezes the surface of the cooled cladding layer, which can make the bottom block move upward, and the bottom block drives the top rod to move upward. When the top rod moves upward, it pushes the linkage rod to rotate, which can make the mounting ring move downward, so that the mounting ring can drive the sleeve to move downward through the connecting ring, and then the sleeve drives the vertical rod to drive the impact block to move downward and close to the surface of the cooled cladding layer. At the same time, when the spiral rod rotates, it drives the sleeve to rotate. When the sleeve rotates, under the action of the reciprocating spiral groove and the guide block, it can drive the vertical rod to reciprocate up and down. When the vertical rod moves, it can drive the impact block to reciprocate and impact the cooled cladding layer back and forth. The impact can cause micro-plastic deformation of the material, which can effectively improve the residual stress of the cladding layer and enhance the cladding effect. It solves the problem that it is inconvenient to reduce the stress of the cladding layer in the prior art, and the residual stress causes the cladding layer to warp and deform and produce cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 It is a structural diagram of the frame, bracket and driving mechanism of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the recovery mechanism of the present invention;

[0030] Figure 4 It is a front cross-sectional structural schematic diagram of the recovery mechanism of the present invention;

[0031] Figure 5 for Figure 4 An enlarged schematic diagram of portion B is shown;

[0032] Figure 6 This is a schematic structural diagram of the coaxial cladding head, connecting shell, mounting shell, annular block, spiral rod, material conveying trough, material discharge channel, and one-way valve of the present invention;

[0033] Figure 7 This is a schematic diagram of the structural decomposition of the connecting shell, the installation shell, the annular block, and the aggregate shell of the present invention;

[0034] Figure 8 for Figure 4 An enlarged schematic diagram of portion A is shown;

[0035] Figure 9 It is a schematic cross-sectional structural diagram of the stress weakening mechanism of the present invention.

[0036] In the figure: 1. frame; 2. coaxial cladding head; 3. driving mechanism; 31. moving block; 32. screw; 33. driving motor; 4. nozzle; 5. recovery mechanism; 51. connecting shell; 52. mounting shell; 53. annular block; 54. collecting shell; 55. feeding trough; 56. screw rod; 57. feeding port; 58. discharging channel; 59. one-way valve; 6. transmission mechanism; 61. support rod; 62. rack; 63. outer ring gear; 7. transmission part; 71. inner ring gear; 72. gear; 8. stress weakening mechanism; 81. mounting groove; 82. sleeve; 83. vertical rod; 84. impact block; 85. connecting ring; 86. mounting ring; 9. bracket; 10. linkage mechanism; 101. bottom block; 102. top rod; 103. linkage rod; 104. ball bearing. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] like Figures 1 to 9 As shown, the present invention provides a fatigue-resistant metal composite material preparation device and process thereof, comprising a frame 1, a coaxial cladding head 2 that moves back and forth is disposed above the frame 1, two brackets 9 are vertically fixedly mounted symmetrically front and back on the upper surface of the frame 1, a driving mechanism 3 is disposed between the two brackets 9 for driving the coaxial cladding head 2 to move, a group of nozzle holes 4 for spraying cladding material are equidistantly formed in the circumferential direction on the bottom end surface of the coaxial cladding head 2, and a recovery mechanism 5 is disposed on the outer surface of the coaxial cladding head 2;

[0039] During use, a metal substrate is placed on the upper surface of the frame 1, and the coaxial cladding head 2 is driven back and forth by the driving mechanism 3. The external feeding device delivers the cladding material through the feeding pipe to the nozzle 4 and sprays it on the substrate surface. At the same time, the laser beam emitter in the coaxial cladding head 2 emits a laser beam to melt the substrate surface and the cladding material to form a cladding layer, thereby preparing a metal composite material.

[0040] The recovery mechanism 5 includes a connecting shell 51 fixedly sleeved on the outer surface of the coaxial cladding head 2, a mounting shell 52 fixedly sleeved on the outer ring of the connecting shell 51, an annular block 53 rotating in the inner cavity of the mounting shell 52, a collection shell 54 fixedly sleeved on the lower part of the inner ring of the annular block 53, a set of feed troughs 55 equidistantly provided on the upper surface of the annular block 53, a spiral rod 56 rotating in the inner cavity of the feed trough 55, and a feed port 55 provided at the lower part of the inner cavity of the feed trough 55 for communicating with the lower part of the inner cavity of the collection shell 54. 7. Discharge channels 58 are circumferentially and equidistantly provided in the middle of the inner cavity of the mounting shell 52 for communicating with the inner cavity of the communicating shell 51; a one-way valve 59 is provided in the inner cavity of the discharge channel 58 for directing the cladding material in the mounting shell 52 into the inner cavity of the communicating shell 51; a transmission mechanism 6 is provided on the outer surfaces of the communicating shell 51 and the mounting shell 52; a transmission member 7 is provided in the upper portion of the inner cavity of the mounting shell 52 for driving the screw rod 56 to rotate; and a stress weakening mechanism 8 is provided at the bottom of the mounting shell 52 and the bottom end of the screw rod 56;

[0041] Among them, a laser beam emitter is provided at the upper part of the inner cavity of the coaxial cladding head 2, a discharge hole connected to the nozzle 4 is opened at the lower part of the inner cavity of the connecting shell 51, and the upper surface of the connecting shell 51 is connected to a feed pipe connected to the feed end of the feeding equipment for externally conveying the cladding material. An annular partition plate is rotatably installed above the annular block 53 in the inner cavity of the mounting shell 52, and the top of the screw rod 56 penetrates to the top of the annular partition plate. The lower part of the screw rod 56 is provided with a support plate through a bearing movable sleeve, and the outer ring wall of the support plate is fixedly connected to the inner cavity of the feed trough 55. A group of diverter baffles are fixedly installed at equal distances in the circumference at the inner cavity opening of the aggregate shell 54, and the diverter baffle has a larger thickness on the side close to the inner ring of the annular block 53, and a smaller thickness on the side away from the inner cavity of the annular block 53.

[0042] During use, some unmelted cladding material can splash into the aggregate shell 54 and enter the inner cavity of the feed trough 55 through the feed port 57. When the driving mechanism 3 drives the coaxial cladding head 2 to move back and forth, the transmission mechanism 6 can drive the annular block 53 to rotate. The rotation of the annular block 53 drives the screw rod 56 to move circumferentially. Under the action of the transmission member 7, the screw rod 56 can rotate while moving circumferentially. When the screw rod 56 rotates, the cladding material entering the feed trough 55 can be transported to the inner cavity of the mounting shell 52. Thereafter, the cladding material enters the inner cavity of the connecting shell 51 through the discharge channel 58 and the one-way valve 59. When the external feeding device transports the cladding material, the cladding material recovered into the connecting shell 51 can be driven by the feeding pipe to be sprayed out again from the nozzle 4 to the surface of the metal substrate for cladding to prepare a metal composite material. Part of the splashed cladding material can be recycled, thereby reducing resource waste, improving resource utilization, and improving the practicality of the device.

[0043] It should be noted that after rapid cooling, the cladding layer will form a certain thickness. When the annular block 53 rotates and the spiral rod 56 moves circumferentially, it can drive the stress weakening mechanism 8 to move. When the stress weakening mechanism 8 interacts with the upper surface of the cladding layer, under the action of the self-rotation of the spiral rod 56, the stress weakening mechanism 8 can be activated to operate and impact the cladding layer. The impact can cause micro-plastic deformation of the material, which can effectively improve the residual stress of the cladding layer and enhance the cladding effect, solving the problem in the prior art that it is inconvenient to reduce the stress of the cladding layer and the residual stress causes the cladding layer to warp and deform and produce cracks.

[0044] like Figure 2 As shown, the driving mechanism 3 includes a moving block 31 arranged between two brackets 9, a screw rod 32 movably installed in the middle of the opposite surfaces of the two brackets 9 through bearings for driving the moving block 31 to move back and forth, and a driving motor 33 fixed on the outside of one bracket 9 for driving the screw rod 32 to rotate; wherein, two stabilizing bars are symmetrically fixed on the left and right sides of the opposite surfaces of the two brackets 9, and the moving block 31 is slidably connected to the stabilizing bar.

[0045] When in use, the motor 33 drives the screw 32 to rotate, which can make the moving block 31 drive the coaxial cladding head 2 to move back and forth, and can prepare the metal substrate by laser cladding composite materials. At the same time, it can drive the recovery mechanism 5 to move and recycle part of the cladding material splashed during cladding.

[0046] like Figure 4As shown, the transmission mechanism 6 includes two support rods 61 symmetrically arranged on the left and right sides of the outer surface of the mounting shell 52, a rack 62 fixedly mounted on one side of the support rod 61 close to the outer surface of the mounting shell 52, and an outer gear ring 63 fixedly sleeved on the outer surface of the annular block 53; wherein, the outer gear ring 63 is engaged with the rack 62, and the left and right sides of the outer surface of the mounting shell 52 are slidably connected to the side walls of the support rod 61 through the provided connecting blocks, and the front and rear ends of the support rod 61 are fixedly connected to the opposite surfaces of the two brackets 9 respectively.

[0047] During use, when the coaxial cladding head 2 moves back and forth, it can drive the annular block 53 to move back and forth. When the annular block 53 moves, under the interaction of the outer ring gear 63 and the rack 62, the annular block 53 can rotate, thereby driving the spiral rod 56 to move circumferentially, and under the action of the transmission member 7, the spiral rod 56 rotates to transport the collected cladding material.

[0048] like Figure 5 As shown, the transmission member 7 includes an inner gear ring 71 fixedly mounted on the upper portion of the inner cavity of the mounting shell 52 and a gear 72 fixedly sleeved on the top of the spiral rod 56 ; wherein the gear 72 is meshed with the inner gear ring 71 .

[0049] During use, when the screw rod 56 moves circumferentially, the interaction between the gear 72 and the inner gear ring 71 can cause the screw rod 56 to rotate.

[0050] like Figure 8 and Figure 9 As shown, the stress weakening mechanism 8 includes a mounting groove 81 provided at the bottom end of the spiral rod 56, a sleeve 82 that moves up and down in the inner cavity of the mounting groove 81, a vertical rod 83 vertically arranged in the inner cavity of the sleeve 82, an impact block 84 fixed to the bottom end of the vertical rod 83, a connecting ring 85 sleeved on the lower part of the outer surface of the spiral rod 56 and fixedly connected to the sleeve 82 through a connecting rod, a mounting ring 86 movably sleeved on the outer ring of the connecting ring 85, and a linkage mechanism 10 provided in the inner cavity of the feed trough 55 and below the annular block 53 for driving the mounting ring 86 to move; wherein, the inner cavity of the sleeve 82 is provided with a reciprocating spiral groove, and a guide block adapted to the inner cavity of the reciprocating spiral groove is fixedly mounted on the upper outer surface of the vertical rod 83, the bottom end of the vertical rod 83 passes through the bottom surface of the annular block 53, and the outer surface of the vertical rod 83 is slidably connected to the bottom surface of the inner cavity of the feed trough 55, and the bottom surface of the mounting ring 86 is connected to the bottom surface of the inner cavity of the feed trough 55 by a first spring telescopic rod.

[0051] During use, the annular block 53 drives the linkage mechanism 10 to move circumferentially when it rotates. After the linkage mechanism 10 contacts and squeezes the rapidly cooled cladding layer, it can drive the mounting ring 86 to move downward. The mounting ring 86 moves downward to drive the connecting ring 85 to drive the sleeve 82 to move downward. The sleeve 82 can drive the vertical rod 83 to move downward. The vertical rod 83 drives the impact block 84 to move downward and close to the surface of the cooled cladding layer. At the same time, the spiral rod 56 drives the sleeve 82 to rotate when it rotates. When the sleeve 82 rotates, it can drive the vertical rod 83 to reciprocate up and down under the action of the reciprocating spiral groove and the guide block. When the vertical rod 83 moves, it can drive the impact block 84 to reciprocate and impact the cooled cladding layer. The impact can cause micro-plastic deformation of the material, weaken the residual stress of the cladding layer, and avoid deformation and cracking of the cooled cladding layer.

[0052] like Figure 9 As shown, the linkage mechanism 10 includes a bottom block 101 arranged below the bottom surface of the annular block 53, two top rods 102 symmetrically fixed vertically on the upper surface of the bottom block 101, a linkage rod 103 symmetrically hinged in the inner cavity of the feed trough 55, and two balls 104 symmetrically movably installed on the bottom surface of the bottom block 101; wherein, the top end of the top rod 102 is traditionally extended into the inner cavity of the feed trough 55, the top end of the top rod 102 is movably connected to one side of the bottom surface of the linkage rod 103, the other side of the bottom surface of the linkage rod 103 is movably connected to the upper surface of the mounting ring 86, the upper surface of the bottom block 101 is connected to the bottom surface of the annular block 53 by a second spring telescopic rod, and a through hole is vertically opened in the middle of the bottom block 101.

[0053] When in use, the annular block 53 rotates, driving the bottom block 101 to rotate circumferentially. When the bottom block 101 rotates circumferentially, the balls 104 at the bottom come into contact and extrude with the surface of the cooled cladding layer, causing the bottom block 101 to move upward, and the bottom block 101 drives the top rod 102 to move upward. When the top rod 102 moves upward, it pushes the linkage rod 103 to rotate, causing the mounting ring 86 to move downward, so that the mounting ring 86 can drive the sleeve 82 to move downward through the connecting ring 85, and then the sleeve 82 drives the vertical rod 83 to drive the impact block 84 to move downward close to the surface of the cooled cladding layer.

[0054] A preparation process of a fatigue-resistant metal composite material comprises the following steps:

[0055] S1: Place the metal substrate on the upper surface of the frame 1. The coaxial cladding head 2 is driven back and forth by the driving mechanism 3. The external feeding device delivers the cladding material through the feeding pipe to the nozzle 4 and sprays it on the substrate surface. At the same time, the laser beam emitter in the coaxial cladding head 2 emits a laser beam to melt the substrate surface and the cladding material to form a cladding layer.

[0056] S2: When some unmelted cladding materials splash, they can enter the aggregate shell 54 and enter the inner cavity of the feed trough 55 through the feed port 57. The screw rod 32 is driven to rotate by the drive motor 33, so that the moving block 31 can drive the coaxial cladding head 2 to move back and forth. When the coaxial cladding head 2 moves back and forth, it can drive the annular block 53 to move back and forth. When the annular block 53 moves, the interaction between the outer gear ring 63 and the rack 62 causes the annular block 53 to rotate. The rotation of the annular block 53 drives the spiral rod 56 to move circumferentially, and the spiral rod 56 moves circumferentially. When the screw 56 is in motion, the interaction between the gear 72 and the inner gear ring 71 can cause the screw rod 56 to move circumferentially and rotate at the same time. When the screw rod 56 rotates, the cladding material entering the feed trough 55 can be transported to the inner cavity of the mounting shell 52. Thereafter, the cladding material enters the inner cavity of the connecting shell 51 through the discharge channel 58 and the one-way valve 59. When the external feeding device transports the cladding material, the cladding material recovered into the connecting shell 51 can be driven by the feeding pipe to be sprayed out again from the nozzle 4 onto the surface of the metal substrate for cladding to prepare the metal composite material.

[0057] S3: After the cladding layer is rapidly cooled, a certain thickness will be formed. When the annular block 53 rotates, it drives the bottom block 101 to rotate circumferentially. When the bottom block 101 rotates circumferentially, the ball 104 at the bottom contacts and squeezes the surface of the cooled cladding layer, which can make the bottom block 101 move upward, and the bottom block 101 drives the top rod 102 to move upward. When the top rod 102 moves upward, it pushes the linkage rod 103 to rotate, which can make the mounting ring 86 move downward, so that the mounting ring 86 can drive the sleeve 82 to move downward through the connecting ring 85, and then the sleeve 82 drives the vertical rod 83 to drive the impact block 84 to move downward and close to the surface of the cooled cladding layer. At the same time, when the spiral rod 56 rotates, it drives the sleeve 82 to rotate. When the sleeve 82 rotates, it can drive the vertical rod 83 to reciprocate up and down under the action of the reciprocating spiral groove and the guide block. When the vertical rod 83 moves, it can drive the impact block 84 to reciprocate and impact the cooled cladding layer. The impact can cause micro-plastic deformation of the material and reduce the residual stress of the cladding layer.

[0058] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0059] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for preparing fatigue-resistant metal composite materials, characterized in that: The invention comprises a frame (1), a coaxial cladding head (2) that moves forward and backward is arranged above the frame (1), two brackets (9) are vertically fixedly installed on the upper surface of the frame (1) in a front-back symmetrical manner, a driving mechanism (3) is arranged between the two brackets (9) for driving the coaxial cladding head (2) to move, a group of spray holes (4) for spraying cladding material are equidistantly opened in the circumferential direction on the bottom end surface of the coaxial cladding head (2), and a recovery mechanism (5) is provided on the outer surface of the coaxial cladding head (2); The recovery mechanism (5) comprises a connecting shell (51) fixedly sleeved on the outer surface of the coaxial cladding head (2), a mounting shell (52) fixedly sleeved on the outer ring of the connecting shell (51), an annular block (53) rotating in the inner cavity of the mounting shell (52), a collection shell (54) fixedly sleeved on the lower part of the inner ring of the annular block (53), a group of feed troughs (55) equidistantly arranged on the upper surface of the annular block (53), a spiral rod (56) rotating in the inner cavity of the feed trough (55), and a feed port (57) arranged in the lower part of the inner cavity of the feed trough (55) for communicating with the lower part of the inner cavity of the collection shell (54). A discharge channel (58) is equidistantly arranged in the middle of the inner cavity of the mounting shell (52) for communicating with the inner cavity of the connecting shell (51); a one-way valve (59) is arranged in the inner cavity of the discharge channel (58) for introducing the cladding material in the mounting shell (52) into the inner cavity of the connecting shell (51); a transmission mechanism (6) is arranged on the outer surfaces of the connecting shell (51) and the mounting shell (52); a transmission member (7) is arranged on the upper part of the inner cavity of the mounting shell (52) for driving the screw rod (56) to rotate; and a stress weakening mechanism (8) is arranged at the bottom of the mounting shell (52) and the bottom end of the screw rod (56); A laser beam emitter is provided at the upper portion of the inner cavity of the coaxial cladding head (2), a discharge hole connected to the nozzle hole (4) is provided at the lower portion of the inner cavity of the connecting shell (51), and a feed pipe for connecting to a feed end of a feed device for externally conveying cladding material is provided on the upper surface of the connecting shell (51).

2. The device for preparing a fatigue-resistant metal composite material according to claim 1, characterized in that: The driving mechanism (3) comprises a moving block (31) arranged between the two brackets (9), a screw rod (32) movably mounted on the middle of the opposite surfaces of the two brackets (9) through a bearing for driving the moving block (31) to move forward and backward, and a driving motor (33) fixed on the outside of one of the brackets (9) for driving the screw rod (32) to rotate; wherein two stabilizing bars are symmetrically fixed on the left and right sides of the opposite surfaces of the two brackets (9), and the moving block (31) is slidably connected to the stabilizing bars.

3. The device for preparing a fatigue-resistant metal composite material according to claim 1, characterized in that: The transmission mechanism (6) comprises two support rods (61) symmetrically arranged on the left and right sides of the outer surface of the mounting shell (52), a rack (62) fixedly mounted on one side of the support rod (61) close to the outer surface of the mounting shell (52), and an outer gear ring (63) fixedly sleeved on the outer surface of the annular block (53); wherein the outer gear ring (63) is engaged with the rack (62), the left and right sides of the outer surface of the mounting shell (52) are slidably connected to the side walls of the support rod (61) through the provided connecting blocks, and the front and rear ends of the support rod (61) are fixedly connected to the opposite surfaces of the two brackets (9) respectively.

4. The device for preparing a fatigue-resistant metal composite material according to claim 1, characterized in that: The transmission member (7) comprises an inner gear ring (71) fixedly mounted on the upper portion of the inner cavity of the mounting shell (52) and a gear (72) fixedly sleeved on the top of the spiral rod (56); wherein the gear (72) meshes with the inner gear ring (71).

5. The device for preparing a fatigue-resistant metal composite material according to claim 1, characterized in that: An annular partition plate is rotatably mounted above the annular block (53) in the inner cavity of the mounting shell (52), and the top end of the spiral rod (56) penetrates above the annular partition plate.

6. The device for preparing a fatigue-resistant metal composite material according to claim 1, characterized in that: The lower part of the spiral rod (56) is provided with a supporting plate through a bearing movable sleeve, and the outer ring wall of the supporting plate is fixedly connected to the inner cavity of the feeding trough (55).

7. The device for preparing a fatigue-resistant metal composite material according to claim 1, characterized in that: A group of diverter baffles are fixedly installed at the inner cavity opening of the aggregate shell (54) at equal intervals in the circumferential direction, and the diverter baffle has a thicker side close to the inner ring of the annular block (53) and a thinner side away from the inner cavity of the annular block (53).

8. The device for preparing a fatigue-resistant metal composite material according to claim 1, characterized in that: The stress weakening mechanism (8) includes a mounting groove (81) provided at the bottom end of the spiral rod (56), a sleeve (82) that moves up and down in the inner cavity of the mounting groove (81), a vertical rod (83) vertically arranged in the inner cavity of the sleeve (82), an impact block (84) fixed at the bottom end of the vertical rod (83), a connecting ring (85) sleeved on the lower part of the outer surface of the spiral rod (56) and fixedly connected to the sleeve (82) through a connecting rod, a mounting ring (86) movably sleeved on the outer ring of the connecting ring (85), and a connecting ring (86) arranged in the inner cavity of the feeding trough (55) and connected to the screw rod (56). A linkage mechanism (10) is provided below the annular block (53) for driving the movement of the mounting ring (86); wherein the inner cavity of the sleeve (82) is provided with a reciprocating spiral groove, and a guide block adapted to the inner cavity of the reciprocating spiral groove is fixedly mounted on the upper portion of the outer surface of the vertical rod (83), the bottom end of the vertical rod (83) penetrates the bottom surface of the annular block (53), and the outer surface of the vertical rod (83) is slidably connected to the bottom surface of the inner cavity of the feed trough (55) in an upward and downward manner, and the bottom surface of the mounting ring (86) is connected to the bottom surface of the inner cavity of the feed trough (55) via a first spring telescopic rod.

9. The device for preparing a fatigue-resistant metal composite material according to claim 8, characterized in that: The linkage mechanism (10) includes a bottom block (101) arranged below the bottom surface of the annular block (53), two top rods (102) symmetrically fixed vertically on the upper surface of the bottom block (101), a linkage rod (103) symmetrically hinged in the inner cavity of the feed trough (55), and two balls (104) symmetrically movably mounted on the bottom surface of the bottom block (101); wherein the top end of the top rod (102) is traditionally extended into the inner cavity of the feed trough (55), the top end of the top rod (102) is movably connected to one side of the bottom surface of the linkage rod (103), the other side of the bottom surface of the linkage rod (103) is movably connected to the upper surface of the mounting ring (86), the upper surface of the bottom block (101) is connected to the bottom surface of the annular block (53) via a second spring telescopic rod, and a through hole is vertically opened in the middle of the bottom block (101).

10. A preparation process using the device for preparing fatigue-resistant metal composite materials according to any one of claims 1 to 9, characterized in that: The following steps are included: S1: placing a metal substrate on the upper surface of the frame (1), driving the coaxial cladding head (2) to move forward and backward by the driving mechanism (3), and delivering the cladding material to the nozzle (4) through the external feeding device through the feeding pipe to spray it onto the substrate surface. At the same time, the laser beam emitter in the coaxial cladding head (2) emits a laser beam to melt the substrate surface and the cladding material to form a cladding layer; S2: When a portion of the unmelted cladding material splashes, it can enter the aggregate shell (54) and enter the inner cavity of the feed trough (55) through the feed port (57). When the driving mechanism (3) drives the coaxial cladding head (2) to move forward and backward, the transmission mechanism (6) can drive the annular block (53) to rotate. The rotation of the annular block (53) drives the spiral rod (56) to move circumferentially. Under the action of the transmission member (7), the spiral rod (56) can generate a circumferential motion while moving circumferentially. The spiral rod (56) is capable of self-rotating, and when self-rotating, the cladding material entering the feeding trough (55) can be transported to the inner cavity of the mounting shell (52), and then the cladding material enters the inner cavity of the connecting shell (51) through the discharge channel (58) and the one-way valve (59). When the external feeding device transports the cladding material, the cladding material recovered into the connecting shell (51) can be driven by the feeding pipe to be sprayed out again from the spray hole (4) to the surface of the metal substrate for cladding to prepare the metal composite material; S3: The annular block (53) rotates and the spiral rod (56) moves circumferentially to drive the stress weakening mechanism (8) to move. Under the action of the self-rotation of the spiral rod (56), the stress weakening mechanism (8) is activated to impact the cladding layer to weaken the residual stress of the cladding layer.

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