Laser welding method for metal 3D printing piece

Abstract

The invention relates to the technical field of metal 3D printing piece welding, in particular to a laser welding method for a metal 3D printing piece, according to the requirement of a workpiece, the laser welding cladding size is adjusted so that welding work can be more precisely and efficiently carried out, and during welding work, the laser welding cladding size can be adjusted according to the size requirement of the workpiece; the welding plate and the extension plate are spliced through the extension assembly, so that the overall welding range is enlarged, the welding device is suitable for welding of more workpieces, the welding plate does not need to be replaced, and the overall machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of metal 3D metal printed parts welding, and in particular to a laser welding method for metal 3D printed parts. Background Art

[0002] Metal 3D laser welding is an advanced manufacturing process that combines additive manufacturing and laser welding technology. Metal 3D printed parts have complex geometric shapes and high precision requirements. Therefore, it is difficult to completely manufacture metal 3D printed parts indiscriminately through conventional production methods. Common metal 3D printing technologies include selective laser melting (SLM) and electron beam melting (EBM). When performing metal 3D printing, special printing technologies and methods can significantly improve the manufacturing efficiency and yield rate of complex metal parts. However, when welding 3D metal printed parts in the prior art, it is difficult to adaptively adjust the size of the laser cladding according to the size of the 3D metal printed parts, and it is also impossible to quickly adjust or replace the welding platform according to the size of the 3D metal printed parts, so the convenience of operation and processing efficiency cannot be guaranteed; In view of the above technical defects, a solution is now proposed. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a laser welding method for metal 3D printed parts. On the basis of quickly adjusting the size of the laser cladding, the welding plate is also quickly spliced ​​and extended, so as to be suitable for the welding of parts of different sizes and solve the technical problems raised by the above-mentioned background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: a laser welding method for metal 3D printed parts, comprising the following steps: Step 1: Preparation of cladding powder: Start the pump in the cladding welding equipment to transport the required powder into the feed pipe through the feed pipe; Step 2, welding plate extension operation: the welding plate is lifted up by the extension assembly, and at the same time, the extension plates on both sides are driven to move toward the two sides of the welding plate in cooperation with the guide slide groove and the third guide slider. When the two extension plates are completely moved to the two sides of the welding plate, the welding plate falls back and combines with the two extension plates to form a larger spliced ​​welding plate; Step 3, position adjustment operation: the fourth motor cooperates with the second synchronous belt and the second synchronous wheel, and relies on the limiting effect of the second slide bar to drive the movable plate to move in the Z-axis direction, and cooperates with the first motor to drive the cladding adjustment mechanism to move in the Y-axis direction through the first screw rod, and the second motor cooperates with the first synchronous wheel and the first synchronous belt, and uses the limiting effect of the first slide bar to drive the cladding adjustment mechanism to move in the X-axis direction; Step 4, cladding welding operation: move the laser generator to a suitable position, start the third motor to drive the second screw to rotate, so as to cooperate with the screw sleeve to drive the ring to rise and fall, and use the ring to drive the first connecting rod to swing, thereby driving the angle of the bottom of the powder feeding tube. By adjusting the angle of the bottom of the powder feeding tube, the size range of the laser cladding is controlled, and finally the metal 3D printed part after laser welding combination is obtained.

[0005] The present invention is realized by processing with a cladding welding device, and the cladding welding device comprises a base, a support frame is fixed to both sides of the base, two first screw rods are symmetrically rotatably connected to both sides of the support frame, a first motor is fixed to the bottom of the first screw rod, and a mounting frame is sleeved on the outer layer of the first screw rod, two first sliding rods are fixed between the two mounting frames, a first slider is sleeved on the outer layers of the two first sliding rods, a cladding adjustment mechanism is installed at the front end of the first slider, and a first synchronous belt is fixed inside the first slider, first synchronous wheels are rotatably sleeved on both sides of the first synchronous belt, and a second motor fixed to the surface of the mounting frame is connected to the rear end of one of the first synchronous wheels; A welding plate is provided inside the base, a movable plate is provided below the welding plate, an extension component is installed between the movable plate and the welding plate, and two second sliders are symmetrically fixed on both sides of the bottom of the movable plate, a second slide bar fixed to the inside of the base passes through the inside of the second slider, a second synchronous belt is fixed to the bottom of the movable plate, and two second synchronous wheels rotatably connected to the inside of the base are symmetrically provided at the front and rear ends of the second synchronous belt, and a fourth motor is fixed to one side of the second synchronous wheel.

[0006] Furthermore, the cladding adjustment mechanism includes a laser generator fixed to the front end of the first slider, a material storage box is fixed to the top of the laser generator, a material delivery pipe is fixed to the top of the material storage box, the material delivery pipe is connected to a pump fixed to the upper surface of the support frame, two fixed plates are fixed to one side of the outer layer of the laser generator, a second screw rod is rotatably connected between the two fixed plates, the top end of the second screw rod passes through and extends to the outside of the fixed plate where a third motor is fixed, and the outer layer of the second screw rod is sleeved with a threaded sleeve, and one side of the threaded sleeve is fixed with a ring sleeved on the outer layer of the laser generator.

[0007] Furthermore, the outer layer of the ring and the outer bottom of the laser generator are equidistantly rotatably connected with three first connecting rods, one side of two of the first connecting rods on the same side are commonly rotatably connected with a powder feeding pipe, the powder feeding pipe and the material storage box are connected through a transmission pipe, the powder feeding pipe and the material storage box are connected through a transmission pipe, a dust cover is provided at the bottom of the laser generator corresponding to the position of the powder feeding pipe, a first through groove is provided on the upper surface of the dust cover corresponding to the position of the powder feeding pipe, the dust cover and the laser generator are fixed by a connecting plate, and a disassembly assembly is installed between the dust cover and the laser generator.

[0008] Furthermore, the expansion component includes a fifth motor fixed inside the movable plate, and a transmission end of the fifth motor is fixed with a rotating drum rotatably connected to the movable plate, the top of the rotating drum penetrates and extends to the outside of the movable plate, and two second through grooves are symmetrically opened on both sides of the bottom of the rotating drum corresponding to the upper surface position of the movable plate.

[0009] Furthermore, a fixing ring is fixed inside the rotating drum, a third slide groove is separated between the rotating drum and the fixing ring, two support columns are symmetrically slidably connected on both sides inside the third slide groove, two conical blocks are symmetrically fixed on both sides of the outer layer of the support columns, and conical grooves are provided at the positions of the conical blocks on both sides of the upper surfaces of the rotating drum and the fixing ring.

[0010] Furthermore, a third spring is fixed to the bottom end of the support column, and the top end of the support column is fixed to the bottom of the welding plate, and a fixed sleeve which is sleeved on the outside of the third spring is fixed to the upper surface of the movable plate at a position corresponding to the third spring.

[0011] Furthermore, two second connecting rods are symmetrically fixed on both sides of the outer layer of the rotating drum, and an auxiliary support rod is slidably sleeved inside the second connecting rod. A rubber cushion and a second spring are respectively fixed at both ends of the auxiliary support rod.

[0012] Furthermore, one side of the second connecting rod is rotatably connected to a curved rod, and the top end of one side of the curved rod is rotatably connected to an extension plate at a position below the welding plate. Two third sliders that penetrate through and extend to the inside of the movable plate are symmetrically fixed to the front and rear ends of the extension plate, and a guide groove is provided on the upper surface of the movable plate at a position corresponding to the third slider.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention achieves welding work through a cladding adjustment mechanism. When printing and welding the workpiece, the third motor cooperates with the second motor to drive the screw sleeve to move, and the movement of the screw sleeve drives the ferrule to rise and fall. At the same time, the connecting rod of the outer layer of the ferrule and the connecting rod at the bottom of the laser generator cooperate with each other to swing, thereby driving the bottom angle of the powder feeding tube to deviate, and adjusting the size of the cladding molding, which can be adjusted at any time according to the welding requirements of the workpiece; 2. The present invention is provided with an extension component, which drives the rotating drum to rotate by the fifth motor, and then drives the two conical grooves to rotate. When the conical groove just starts to rotate, the conical block moves out of the conical groove and moves up a certain distance, so that the support column drives the welding plate to move up. As the rotating drum continues to rotate, the extension plate is driven to cooperate with the third slider and the third guide groove to move horizontally. When the extension plate moves to both sides of the welding plate, the conical block just returns to the inside of the conical groove and descends a certain distance. The support column drives the welding plate to descend and is spliced ​​and combined with the two extension plates as a whole, so as to facilitate welding of larger-sized workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the cladding adjustment mechanism of the present invention; Figure 3 It is a combined view of the second connecting rod and the dust cover of the present invention; Figure 4 A top view of the interior of the dust cover of the present invention; Figure 5 A combined view of a welding plate and a moving plate of the present invention; Figure 6 It is a structural schematic diagram of the expansion component of the present invention; Figure 7 It is a structural schematic diagram of the rotating drum of the present invention; Figure 8 It is a combined view of the rotating drum and the moving plate of the present invention; Fig. 9 It is a flow chart of the present invention.

[0015] Figure numerals: 1, base; 2, moving plate; 3, welding plate; 4, first motor; 5, first screw rod; 6, first synchronous wheel; 7, second motor; 8, first slider; 9, support frame; 10, pump; 11, feed pipe; 12, first slide rod; 13, first synchronous belt; 14, mounting frame; 15, cladding adjustment mechanism; 16, material storage box; 17, third motor; 18, second screw rod; 19, screw sleeve; 20, fixing plate; 21, powder feeding pipe; 22, connecting plate; 23, dust cover; 24, disassembly assembly; 25, first through groove; 26, first connecting rod; 27, ferrule; 28, laser generator; 29 , the first spring; 30, the limit slider; 31, the limit slide groove; 32, the block; 33, the slot; 34, the paddle; 35, the extension component; 36, the guide slide groove; 37, the second slider; 38, the second synchronous belt; 39, the second synchronous wheel; 40, the fourth motor; 41, the second slide rod; 42, the extension plate; 43, the curved rod; 44, the auxiliary support rod; 45, the second connecting rod; 46, the rotating drum; 47, the fixing ring; 48, the second spring; 49, the supporting column; 50, the second through groove; 51, the third slide groove; 52, the conical block; 53, the conical slot; 54, the third spring; 55, the fifth motor; 56, the fixing sleeve. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0017] Embodiment 1: In view of the technical defect in the prior art that it is difficult to adaptively adjust the size of the laser cladding according to the size of the 3D metal printed parts during welding of the 3D metal printed parts.

[0018] like Figure 1-2 As shown, this embodiment proposes a laser welding method for metal 3D printed parts, which is realized by processing with cladding welding equipment. The cladding welding equipment includes a base 1, and a support frame 9 is fixed on both sides of the base 1. Two first screw rods 5 are symmetrically rotatably connected on both sides of the support frame 9. A first motor 4 is fixed to the bottom of the first screw rod 5. The first motor 4 drives the first screw rod 5 to rotate, and then drives the cladding adjustment mechanism 15 to rise and fall, so as to adjust the position of the cladding adjustment mechanism 15, and the outer layer of the first screw rod 5 is sleeved with a mounting frame 14, and two first sliding rods 12 are fixed between the two mounting frames 14. The outer layers of the two first sliding rods 12 are sleeved with a first slider 8, and the front end of the first slider 8 is installed with the cladding adjustment mechanism 15; The cladding adjustment mechanism 15 includes a laser generator 28 fixed to the front end of the first slider 8. The laser generator 28 uses a fiber laser. Specific models include but are not limited to YLR-500-AC laser, YLR-1000-AC laser and FL1000 laser. A material storage box 16 is fixed to the top of the laser generator 28. A material delivery pipe 11 is fixed to the top of the material storage box 16. The material delivery pipe 11 is connected to a pump 10 fixed to the upper surface of the support frame 9. Two fixed plates 20 are fixed to one side of the outer layer of the laser generator 28. A second screw rod 18 is rotatably connected between the two fixed plates 20. The top end of the second screw rod 18 passes through and extends to the outside of the fixed plate 20, and the third motor 17 is fixed thereon. The outer layer of the second screw rod 18 is sleeved with a screw sleeve 19, and one side of the screw sleeve 19 is fixed with a collar 27 sleeved on the outer layer of the laser generator 28. The collar 27 drives the three first connecting rods 26 to swing, and the swing of the three first connecting rods 26 at the bottom drives the bottom end angle of the powder feeding tube 21 to deviate, so as to adjust the size of the cladding molding. The outer layer of the ferrule 27 and the outer layer bottom of the laser generator 28 are equidistantly connected to three first connecting rods 26, and one side of the two first connecting rods 26 on the same side is connected to the powder delivery pipe 21, and the powder delivery pipe 21 is connected to the storage box 16 through a transmission pipe. A dust cover 23 is provided at the bottom of the laser generator 28 corresponding to the position of the powder delivery pipe 21, and a first through groove 25 is provided on the upper surface of the dust cover 23 corresponding to the position of the powder delivery pipe 21. The dust cover 23 and the laser generator 28 are fixed by a connecting plate 22, and a disassembly component 24 is installed between the dust cover 23 and the laser generator 28; A first synchronous belt 13 is fixed inside the first slider 8, and first synchronous wheels 6 are rotatably sleeved on both sides of the first synchronous belt 13. A second motor 7 fixed to the surface of the mounting frame 14 is connected to the rear end of one of the first synchronous wheels 6. The first synchronous wheel 6 and the first synchronous belt 13 are coordinated by the second motor 7, and the first slider 8 is driven to move along the first slider 12 by utilizing the guiding effect of the first slider 12.

[0019] The second motor 7 cooperates with the first synchronous wheel 6 and the first synchronous belt 13, and utilizes the guiding effect of the first slide bar 12 to drive the first slide bar 8 to move along the first slide bar 12, and cooperates with the first motor 4 to drive the first screw rod 5 to rotate, thereby driving the cladding adjustment mechanism 15 to rise and fall, so as to adjust the position of the cladding adjustment mechanism 15. When the position is set, the laser generator 28 is started to emit laser, and at the same time, the powder material is drawn out and discharged from the inside of the storage box 16 through the powder feeding pipe 21, and the two cooperate to perform powder material cladding molding work; During the cladding process, the third motor 17 drives the second screw 18 to rotate, and the rotation of the second screw 18 drives the screw sleeve 19 to rise and fall, and then drives the ring 27 to rise and fall. The three first connecting rods 26 are driven to swing by the ring 27, and the bottom end angle of the powder feeding tube 21 is driven to deviate in coordination with the swing of the three first connecting rods 26 at the bottom, so as to adjust the size of the cladding.

[0020] Embodiment 2: A technical defect in the prior art that dust is scattered randomly during welding of 3D metal printed parts is addressed.

[0021] like Figure 3-4 As shown, the present embodiment provides a disassembly assembly 24 installed between the dust cover 23 and the laser generator 28. The disassembly assembly 24 is defined as three limit slide grooves 31 equidistantly opened inside the dust cover 23. Two limit slide blocks 30 are symmetrically slidably connected to the inner sides of the limit slide grooves 31. The first spring 29 and the clamping block 32 are respectively fixed to the two sides of the limit slide block 30. The first spring 29 is used to reset the limit slider 30 to ensure the engagement state between the block 32 and the slot 33, and a paddle 34 is fixed on the upper surface of the limit slider 30, which passes through and extends to the outside of the limit slot 31, and slots 33 are provided on both sides of the bottom end of the connecting plate 22 at positions corresponding to the block 32, and a slot is provided on the upper surface of the dust cover 23 at positions corresponding to the connecting plate 22.

[0022] When too much powder material accumulates inside the dust cover 23 and may cause blockage, the paddle 34 is moved to drive the limit slider 30 to move, thereby driving the card block 32 to move out of the card slot 33, releasing the engagement state between the connecting plate 22 and the dust cover 23, and then the dust cover 23 can be removed to clean up the excessive powder material accumulated inside the dust cover 23 to avoid subsequent blockage that makes it impossible to continue welding. At the same time, the dust cover 23 is used to prevent excessive loss and dispersion of powder material.

[0023] Embodiment 3: In view of the technical defect in the prior art that when welding 3D metal printed parts, the welding platform cannot be quickly adjusted or replaced according to the size of the 3D metal printed parts.

[0024] like Figure 5-8 As shown, the present embodiment further provides an extension component 35, which includes a fifth motor 55 fixed inside the moving plate 2, a rotating drum 46 rotatably connected to the inside of the moving plate 2 is fixed to the transmission end of the fifth motor 55, the top of the rotating drum 46 penetrates and extends to the outside of the moving plate 2, and two second through grooves 50 are symmetrically opened on both sides of the bottom of the rotating drum 46 corresponding to the upper surface of the moving plate 2; A fixing ring 47 is fixed inside the rotating cylinder 46, and a third slide groove 51 is separated between the rotating cylinder 46 and the fixing ring 47. Two support columns 49 are symmetrically slidably connected on both sides of the third slide groove 51. Two conical blocks 52 are symmetrically fixed on both sides of the outer layer of the support column 49. Conical grooves 53 are provided at positions corresponding to the conical blocks 52 on both sides of the upper surface of the rotating cylinder 46 and the fixing ring 47. As the conical grooves 53 rotate, the conical blocks 52 are lifted up. A third spring 54 is fixed to the bottom end of the support column 49, and the top end of the support column 49 is fixed to the bottom of the welding plate 3 and drives the support column 49 to rise. As the support column 49 is lifted up, the welding plate 3 also moves upward. A fixing sleeve 56 sleeved on the outside of the third spring 54 is fixed at the position corresponding to the third spring 54 on the upper surface of the moving plate 2. Two second connecting rods 45 are symmetrically fixed on both sides of the outer layer of the rotating drum 46. When the rotating drum 46 rotates, the second connecting rod 45 is driven to rotate. The second connecting rod 45 is internally slidably sleeved with an auxiliary support rod 44. Rubber pads and second springs 48 are respectively fixed at both ends of the auxiliary support rod 44. The rubber pads are used to buffer the falling welding plate 3 to avoid damage caused by excessive impact. One side of the second connecting rod 45 is rotatably connected to a curved rod 43. The top of one side of the curved rod 43 is rotatably connected to an extension plate 42 at a position below the welding plate 3. As the second connecting rod 45 rotates, the curved rod 43 is driven to rotate and extend, thereby driving the two extension plates 42 to move along the guide slot 36. Two third sliders that penetrate and extend into the interior of the moving plate 2 are symmetrically fixed to the front and rear ends of the extension plate 42. A guide slot 36 is provided on the upper surface of the moving plate 2 at the position corresponding to the third slider.

[0025] When the size of the workpiece to be welded and printed is too large, the fifth motor 55 is started to drive the rotating drum 46 to rotate, and the rotation of the rotating drum 46 drives the fixing ring 47 to rotate, and at the same time, the four conical grooves 53 rotate synchronously, and the rotation of the conical grooves 53 drives the jacking conical block 52 to rise, and drives the support column 49 to rise, and as the support column 49 is lifted up, the welding plate 3 also moves upward; As the rotating drum 46 rotates, it drives the second connecting rod 45 to rotate. As the second connecting rod 45 rotates, it drives the curved rod 43 to rotate and extend, thereby driving the two extension plates 42 to move along the guide groove 36. When the rotating drum 46 continues to rotate, the conical groove 53 rotates to the position of the conical block 52, and the two extension plates 42 are just located on both sides of the welding plate 3. At the same time, the conical block 52 falls into the conical groove 53, driving the support column 49 to fall back under the pressure of the welding plate 3. During the falling process, the welding plate 3 is buffered by the rebound force of the third spring 54 and the second spring 48.

[0026] Embodiment 4: Fig. 9 As shown, the present invention also provides a laser welding method for metal 3D printed parts, comprising the following steps: Step 1: Preparation of cladding powder material: Start the pump 10 in the cladding welding equipment to transport the required powder material into the inside of the conveying pipe 11 through the conveying pipe 11; Step 2, welding plate extension operation: the welding plate 3 is lifted up by the extension assembly 35, and at the same time, the extension plates 42 on both sides are driven to move toward the two sides of the welding plate 3 in cooperation with the guide slide groove 36 and the third guide slide block. When the two extension plates 42 are completely moved to the two sides of the welding plate 3, the welding plate 3 falls back and combines with the two extension plates 42 to form a larger spliced ​​welding plate for welding larger parts. Step 3, position adjustment operation: the fourth motor 40 cooperates with the second synchronous belt 38 and the second synchronous wheel 39, and relies on the limiting effect of the second slide bar 41 to drive the movable plate 2 to move in the Z-axis direction, and cooperates with the first motor 4 to drive the cladding adjustment mechanism 15 to move in the Y-axis direction through the first screw rod 5, and the second motor 7 cooperates with the first synchronous wheel 6 and the first synchronous belt 13, and uses the limiting effect of the first slide bar 12 to drive the cladding adjustment mechanism 15 to move in the X-axis direction. The three-axis motion cooperates with each other to facilitate welding work at different positions; Step 4, cladding welding operation: the laser generator 28 moves to a suitable position, and the third motor 17 is started to drive the second screw 18 to rotate, so as to cooperate with the screw sleeve 19 to drive the ring 27 to rise and fall, and the lifting of the ring 27 drives the first connecting rod 26 to swing, thereby driving the angle of the bottom of the powder feeding tube 21. By adjusting the angle of the bottom of the powder feeding tube 21, the size range of the laser cladding is controlled so that it can be adjusted according to the requirements of the parts to be processed, and finally the metal 3D printed parts after laser welding combination are obtained.

[0027] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change; Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser welding method for metal 3D printed parts, characterized in that: The following steps are involved: Step 1, cladding powder material preparation operation: starting the pump (10) in the cladding welding equipment to transport the required powder material into the inside of the material transport pipe (11) through the material transport pipe (11); Step 2, welding plate extension operation: the welding plate (3) is driven to rise by the extension component (35), and at the same time, the extension plates (42) on both sides are driven to move toward the two sides of the welding plate (3) in cooperation with the guide slide groove (36) and the third guide slide block. When the two extension plates (42) are completely moved to the two sides of the welding plate (3), the welding plate (3) falls back and combines with the two extension plates (42) to form a larger spliced ​​welding plate; Step 3, position adjustment operation: the fourth motor (40) cooperates with the second synchronous belt (38) and the second synchronous wheel (39), and relies on the limiting effect of the second slide bar (41) to drive the movable plate (2) to move in the Z-axis direction, and cooperates with the first motor (4) to drive the cladding adjustment mechanism (15) to move in the Y-axis direction through the first screw rod (5), and the second motor (7) cooperates with the first synchronous wheel (6) and the first synchronous belt (13), and utilizes the limiting effect of the first slide bar (12) to drive the cladding adjustment mechanism (15) to move in the X-axis direction; Step 4, cladding welding operation: the laser generator (28) is moved to a suitable position, and the third motor (17) is started to drive the second screw (18) to rotate, thereby cooperating with the screw sleeve (19) to drive the ring (27) to rise and fall, and the lifting of the ring (27) drives the first connecting rod (26) to swing, thereby driving the angle of the bottom of the powder feeding tube (21), and by adjusting the angle of the bottom of the powder feeding tube (21), the size range of the laser cladding is controlled, and finally the metal 3D printed part after laser welding is obtained.

2. A laser welding method for metal 3D printed parts according to claim 1, which is implemented by a cladding welding device, wherein the cladding welding device comprises a base (1), characterized in that: A support frame (9) is fixed to both sides of the base (1), two first screw rods (5) are symmetrically rotatably connected to both sides of the support frame (9), a first motor (4) is fixed to the bottom of the first screw rod (5), and the outer layer of the first screw rod (5) is sleeved with a mounting frame (14), two first sliding rods (12) are fixed between the two mounting frames (14), the outer layers of the two first sliding rods (12) are sleeved with a first slider (8), a cladding adjustment mechanism (15) is installed at the front end of the first slider (8), and a first synchronous belt (13) is fixed inside the first slider (8), and first synchronous wheels (6) are rotatably sleeved inside the two sides of the first synchronous belt (13), and the rear end of one of the first synchronous wheels (6) is connected to a second motor (7) fixed to the surface of the mounting frame (14); A welding plate (3) is arranged inside the base (1), a movable plate (2) is arranged below the welding plate (3), an extension component (35) is installed between the movable plate (2) and the welding plate (3), and two second sliders (37) are symmetrically fixed on both sides of the bottom of the movable plate (2), a second slide bar (41) fixed to the inside of the base (1) passes through the inside of the second slider (37), a second synchronous belt (38) is fixed to the bottom of the movable plate (2), two second synchronous wheels (39) rotatably connected to the inside of the base (1) are symmetrically arranged at the front and rear ends of the second synchronous belt (38), and a fourth motor (40) is fixed to one side of the second synchronous wheel (39).

3. A laser welding method for metal 3D printed parts according to claim 2, characterized in that: The cladding adjustment mechanism (15) comprises a laser generator (28) fixed to the front end of the first slider (8), a material storage box (16) being fixed to the top end of the laser generator (28), a material delivery pipe (11) being fixed to the top end of the material storage box (16), the material delivery pipe (11) being connected to a pump (10) fixed to the upper surface of the support frame (9), two fixed plates (20) being fixed to the outer side of the laser generator (28), a second screw rod (18) being rotatably connected between the two fixed plates (20), the top end of the second screw rod (18) penetrating and extending to the outside of the fixed plate (20) where a third motor (17) is fixed, and the outer layer of the second screw rod (18) is sleeved with a threaded sleeve (19), and one side of the threaded sleeve (19) is fixed with a ferrule (27) sleeved with the outer layer of the laser generator (28).

4. A laser welding method for metal 3D printed parts according to claim 3, characterized in that: The outer layer of the ferrule (27) and the outer layer bottom of the laser generator (28) are equidistantly connected to three first connecting rods (26), one side of two first connecting rods (26) on the same side are connected to a powder delivery pipe (21) in a common rotational manner, the powder delivery pipe (21) is connected to the material storage box (16) via a transmission pipe, and the powder delivery pipe (21) is connected to the material storage box (16) via a transmission pipe. A dust cover (23) is provided at the bottom of the laser generator (28) at a position corresponding to the powder delivery pipe (21), a first through groove (25) is provided on the upper surface of the dust cover (23) at a position corresponding to the powder delivery pipe (21), the dust cover (23) and the laser generator (28) are fixed via a connecting plate (22), and a disassembly component (24) is installed between the dust cover (23) and the laser generator (28).

5. The laser welding method for metal 3D printed parts according to claim 1, characterized in that: The extension component (35) comprises a fifth motor (55) fixed inside the movable plate (2), a driving end of the fifth motor (55) being fixed with a rotating drum (46) rotatably connected to the inside of the movable plate (2), the top end of the rotating drum (46) passing through and extending to the outside of the movable plate (2), and two second through grooves (50) being symmetrically formed on both sides of the bottom of the rotating drum (46) at positions corresponding to the upper surface of the movable plate (2).

6. A laser welding method for metal 3D printed parts according to claim 5, characterized in that: A fixing ring (47) is fixed inside the rotating cylinder (46), a third slide groove (51) is separated between the rotating cylinder (46) and the fixing ring (47), two supporting columns (49) are symmetrically slidably connected on both sides of the interior of the third slide groove (51), two conical blocks (52) are symmetrically fixed on both sides of the outer layer of the supporting columns (49), and conical grooves (53) are provided at positions corresponding to the conical blocks (52) on both sides of the upper surfaces of the rotating cylinder (46) and the fixing ring (47).

7. A laser welding method for metal 3D printed parts according to claim 6, characterized in that: A third spring (54) is fixed to the bottom end of the support column (49), and the top end of the support column (49) is fixed to the bottom of the welding plate (3). A fixed sleeve (56) sleeved on the outside of the third spring (54) is fixed to the upper surface of the movable plate (2) at a position corresponding to the third spring (54).

8. A laser welding method for metal 3D printed parts according to claim 7, characterized in that: Two second connecting rods (45) are symmetrically fixed on both sides of the outer layer of the rotating cylinder (46), and an auxiliary support rod (44) is slidably sleeved inside the second connecting rod (45). A rubber cushion and a second spring (48) are respectively fixed at both ends of the auxiliary support rod (44).

9. A laser welding method for metal 3D printed parts according to claim 8, characterized in that: One side of the second connecting rod (45) is rotatably connected to a curved rod (43), and the top end of one side of the curved rod (43) is rotatably connected to an extension plate (42) at a position below the welding plate (3). Two third sliding blocks penetrating through and extending into the interior of the movable plate (2) are symmetrically fixed at the front and rear ends of the extension plate (42), and a guide groove (36) is provided on the upper surface of the movable plate (2) at a position corresponding to the third sliding block.

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