Platform stabilizing device for laser 3D printing

Abstract

The platform stabilizing device for laser 3D printing comprises a machine box and a box door rotationally connected to the outer side of the machine box through a hinge, a supporting device is fixedly connected to the inner side of the machine box, a guide limiting frame is fixedly connected to the top of the supporting device, and conveying rollers are rotationally connected to the two sides of the top of the guide limiting frame; and the outer side of the conveying roller is sleeved with a conveying belt, and the outer side of the guide limiting frame is slidably connected with a scraping device. According to the device, the three-slot platform lifting frame is arranged, and grooves in the two sides of the three-slot platform lifting frame are used for storing metal powder. When the printing platform descends, the main telescopic rod synchronously descends along with the hydraulic telescopic rod, at the moment, hydraulic oil in the main telescopic rod enters the auxiliary telescopic rod through the liquid guide assembly, meanwhile, the auxiliary telescopic rod pushes the push plate to slide upwards in the grooves in the two sides, metal powder is pushed upwards, and sufficient materials are provided for subsequent printing.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing technology, and specifically to a platform stabilizing device for laser 3D printing. Background Art

[0002] As an advanced manufacturing technology, laser 3D printing technology has been widely applied in many fields. It can stack materials layer by layer according to a computer model to manufacture parts with complex shapes. However, during the laser 3D printing process, the stability of the printing platform plays a decisive role in the printing quality.

[0003] In the laser 3D printing of metal powder, the supply stability of the printing material is one of the key issues. At present, most printing platforms lack effective powder storage and pushing mechanisms, resulting in insufficient or uneven powder supply during printing, which affects the forming quality of the parts. For example, some devices cannot synchronously and stably push metal powder when the printing platform descends, resulting in insufficient material for subsequent printing or uneven powder laying, causing problems such as poor surface quality and low dimensional accuracy of the parts. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a platform stabilizing device for laser 3D printing, which solves the problem of insufficient or uneven powder supply in the laser 3D printing of metal powder.

[0006] (2) Technical Solutions

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A platform stabilizing device for laser 3D printing includes a chassis and a door rotatably connected to the outside of the chassis by a hinge. A support device is fixedly connected to the inside of the chassis. The top of the support device is fixedly connected with a guiding and limiting frame. Both sides of the top of the guiding and limiting frame are rotatably connected with conveying rollers. A conveyor belt is sleeved on the outside of the conveying rollers. A scraping device is slidably connected to the outside of the guiding and limiting frame; the conveyor belt is connected to the scraping device to provide power for the scraping device, enabling it to slide along a specific path outside the guiding and limiting frame to achieve the leveling operation of the metal powder on the printing platform.

[0008] The support device includes a three-slot platform lifting frame. A printing platform is slidably connected to the center of the three-slot platform lifting frame. A main telescopic rod is fixedly connected to the bottom of the printing platform. A substrate is fixedly connected to the bottom of the main telescopic rod. An auxiliary telescopic rod is fixedly connected to the bottom of the substrate. A push plate is fixedly connected to the top of the auxiliary telescopic rod. An oil storage component is fixedly connected to the center of the top of the substrate. Liquid guiding components are fixedly connected to both sides of the oil storage component. Electric push rods are fixedly connected to both sides of the substrate. A synchronous plate is fixedly connected to the outside of the electric push rods. A hydraulic telescopic rod is fixedly connected to the top of the substrate. The printing platform at the center of the three-slot platform lifting frame is the bearing surface for printing work. The lifting of the printing platform is controlled by the hydraulic telescopic rod. When starting a new layer of printing, the hydraulic telescopic rod contracts, causing the printing platform to descend by a layer thickness distance;

[0009] The scraping device includes a displacement adjusting frame. A protective shell is fixedly connected to the bottom of the displacement adjusting frame. Limit sliding plates are slidably connected to both sides of the protective shell. A scraping plate is rotatably connected to the outside of the limit sliding plates. A torsion spring is fixedly connected to one side of the scraping plate. A V-shaped frame is fixedly connected to the other side of the scraping plate. The scraping plate is rotatably connected to the limit sliding plate through the torsion spring, enabling the scraping plate to rotate when encountering resistance and return to its original position after the resistance disappears, better adapting to the powder surface condition.

[0010] Preferably, the outside of the guiding and limiting frame is fixedly connected to the inside of the machine case. The outside of the conveyor belt is fixedly connected to the top of the scraping device. The outside of the three-slot platform lifting frame is fixedly connected to the inside of the machine case. The inner wall of the bottom of the machine case is fixedly connected to the bottom of the substrate. Among them, the two grooves on both sides of the three-slot platform lifting frame are used to store metal powder.

[0011] Preferably, the bottom of the printing platform is fixedly connected to the top of the hydraulic telescopic rod. The outside of the push plate is slidably connected to both sides of the three-slot platform lifting frame. Both sides of the liquid guiding component are respectively fixedly connected to the bottoms of the main telescopic rod and the auxiliary telescopic rod. When the printing platform descends, the main telescopic rod synchronously descends with the hydraulic telescopic rod. At this time, the hydraulic oil in the main telescopic rod enters the auxiliary telescopic rod through the liquid guiding component. At the same time, the auxiliary telescopic rod pushes the push plate to slide upward in the two grooves on both sides, pushing the metal powder upward.

[0012] Preferably, the outside of the displacement adjusting frame is slidably connected to the outside of the guiding and limiting frame. The top of the displacement adjusting frame is fixedly connected to the top of the conveyor belt through a clamping block. A telescopic cylinder is fixedly connected to the top of the protective shell. The telescopic movement of the telescopic cylinder can control the sliding of the limit sliding plate on both sides of the protective shell, thereby adjusting the height of the scraping plate.

[0013] Preferably, the bottom end of the telescopic cylinder is fixedly connected to the top of the limit slide plate, the outer side of the limit slide plate is fixedly connected to the side of the torsion spring away from the scraper, and the V-shaped frames are linearly arranged along the outer side of the scraper, which helps to improve the effect of the scraper in leveling the powder.

[0014] Preferably, the liquid guiding assembly includes an oil guiding cylinder, a hollow guiding rod is fixedly connected to the inner side of the oil guiding cylinder, and the hollow guiding rods are arranged annularly along the inner wall of the oil guiding cylinder. An annular sliding block is slidably connected to the outer wall of the hollow guiding rod, a sealing block is fixedly connected to the inner side of the annular sliding block, and a connecting rod is fixedly connected to the inner side of the sealing block. When the electric push rod contracts, the inner wall of the annular sliding block is separated from the liquid inlet hole, and at the same time, the outer wall of the annular sliding block blocks the port of the connecting pipe. At this time, the hydraulic oil can be communicated in the oil guiding cylinder through the liquid inlet hole and the liquid outlet hole opened on the surface of the hollow guiding rod.

[0015] Preferably, the two sides of the oil guiding cylinder are respectively fixedly connected to the bottoms of the main telescopic rod and the auxiliary telescopic rod. A liquid inlet hole is opened in the wall of the hollow guiding rod close to the annular sliding block, and a liquid outlet hole is opened in the wall of the hollow guiding rod away from the annular sliding block. The outer side of the annular sliding block is slidably connected to the inner wall of the oil guiding cylinder. When the electric push rod extends, the synchronous plate drives the connecting rod to move in the opposite direction. At this time, the sealing block moves synchronously therewith and drives the annular sliding block to move together, blocking the liquid inlet hole again. At the same time, as the annular sliding block moves, the port of the connecting pipe is reconnected to the inside of the oil guiding cylinder.

[0016] Preferably, the outer side of the connecting rod is fixedly connected to the outer side of the synchronous plate. A compression spring is fixedly connected to the outer wall of the connecting rod. An annular sliding plate is fixedly connected to the outer side of the compression spring. The inner side of the annular sliding plate is slidably connected to the outer side of the connecting rod. A rubber ring is fixedly connected to the outer side of the annular sliding plate. A limiting ring is fixedly connected to the inner side of the oil guiding cylinder. When the outer wall of the annular sliding plate contacts and presses against the outer wall of the limiting ring, the compression spring is compressed under force at this time, thereby forcing the rubber ring to be elastically deformed under force and tightly attached to the inner wall of the oil guiding cylinder.

[0017] Preferably, the oil storage assembly includes a mounting frame, a liquid storage cylinder is fixedly connected to the top of the mounting frame, a forward and reverse lead screw is rotatably connected to the bottom of the mounting frame, a connecting plate is threadedly connected to the outer wall of the forward and reverse lead screw, a piston rod is fixedly connected to the top of the connecting plate, and a connecting pipe is fixedly connected to the outer side of the liquid storage cylinder. When the motor outside the mounting frame drives the forward and reverse lead screw to rotate, the two connecting plates drive the piston rods in the liquid storage cylinder to move away from each other synchronously.

[0018] Preferably, the bottom of the mounting frame is fixedly connected to the top of the substrate, the inner side of the liquid storage cylinder is slidably connected to the outer side of the piston rod, the outer side of the connecting plate is slidably connected to the inner wall of the mounting frame, and one end of the connecting pipe away from the liquid storage cylinder is fixedly connected to the outer wall of the oil guiding cylinder. The hydraulic oil in the liquid storage cylinder can be squeezed into the four main telescopic rods through the connecting pipe and the liquid guiding assembly.

[0019] (III) Beneficial effects

[0020] The present invention provides a platform stabilizing device for laser 3D printing. It has the following beneficial effects:

[0021] (I). By setting the three-slot platform lifting frame, the grooves on both sides of the three-slot platform lifting frame are used to store metal powder. When the printing platform descends, the main telescopic rod descends synchronously with the hydraulic telescopic rod. At this time, the hydraulic oil in the main telescopic rod enters the auxiliary telescopic rod through the liquid guiding assembly. At the same time, the auxiliary telescopic rod pushes the push plate to slide upward in the grooves on both sides, pushing the metal powder upward to provide sufficient materials for subsequent printing.

[0022] (II). By setting the liquid guiding assembly, when the electric push rod contracts, the inner wall of the annular sliding block is separated from the liquid inlet hole, and at the same time, the outer wall of the annular sliding block blocks the port of the connecting pipe. At this time, the hydraulic oil can be communicated in the oil guiding cylinder through the liquid inlet hole and the liquid outlet hole opened on the surface of the hollow guide rod, so that the hydraulic oil in the main telescopic rod and the auxiliary telescopic rod is communicated. When the printing platform descends, the push plates on both sides can rise synchronously to push the metal powder, ensuring the uniformity of powder laying.

[0023] (III). By setting the rubber ring, the electric push rod continues to contract until the outer wall of the annular sliding plate contacts and squeezes against the outer wall of the limiting ring and then stops. At this time, the compression spring is compressed under force, forcing the rubber ring to be squeezed and elastically deformed and to be closely attached to the inner wall of the oil guiding cylinder. At this time, under the combined action of the annular sliding block and the rubber ring, the oil guiding cylinder is in a closed state. Since the hydraulic oil in the main telescopic rod cannot be discharged at this time, its length is fixed. Cooperating with the immovable hydraulic telescopic rod, it can stably support the printing platform and avoid printing defects caused by platform instability.

[0024] (IV). By setting the annular sliding block, when the electric push rod extends, the main telescopic rod is communicated with the inside of the oil storage assembly at the top of the substrate, thereby disconnecting the synchronous linkage between the main telescopic rod and the auxiliary telescopic rod. When cleaning the powder, the push plate can be displaced to the upper dead center first, and then the synchronous linkage between the main telescopic rod and the auxiliary telescopic rod can be disconnected through the liquid guiding assembly. At this time, the printing platform can be controlled separately at the upper dead center, so that the operator can more conveniently clean the metal powder attached to the surface of the printing platform, inside the three-slot platform lifting frame, and on the push plate, reducing the powder residue at the bottom of the groove.

[0025] (5) The device is provided with an oil storage assembly. When the motor outside the mounting frame drives the forward and reverse lead screw to rotate, the connecting plates on both sides synchronously drive the piston rods in the liquid storage cylinder to move away from each other, and squeeze the hydraulic oil in the liquid storage cylinder into the four main telescopic rods through the connecting pipe and the liquid guiding assembly, and cooperate with the hydraulic telescopic rods to synchronously lift the printing platform, so that a supporting force can be evenly provided under the printing platform, and the printing platform can be prevented from tilting or shaking due to uneven force.

[0026] (6) The device is provided with a scraping assembly. The expansion and contraction of the telescopic cylinder can control the sliding of the limit sliding plate on both sides of the protective shell, so as to adjust the height of the scraping plate. The scraping plate is rotationally connected to the limit sliding plate through a torsion spring, so that the scraping plate can rotate when encountering resistance and return to its original position after the resistance disappears, better adapting to the surface condition of the powder. The V-shaped frames are linearly arranged along the outer side of the scraping plate, which helps to improve the effect of the scraping plate in scraping the powder flat. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0028] Figure 2 is a schematic structural diagram of the interior of the present invention;

[0029] Figure 3 is a schematic structural diagram of the guiding and limiting frame of the present invention;

[0030] Figure 4 is a schematic structural diagram of the supporting device of the present invention;

[0031] Figure 5 is a schematic structural diagram of the liquid guiding assembly of the present invention;

[0032] Figure 6 of the present invention Figure 5 schematic structural diagram of the structure at A;

[0033] Figure 7 is a schematic structural diagram of the oil storage assembly of the present invention;

[0034] Figure 8 is a schematic structural diagram of the scraping device of the present invention;

[0035] Figure 9 is a schematic structural diagram of the scraping plate of the present invention.

[0036] In the figure: 1, chassis; 2, cabinet door; 3, support device; 4, guiding and limiting frame; 5, conveying roller; 6, conveyor belt; 7, scraping device; 31, three-slot platform lifting frame; 32, printing platform; 33, main telescopic rod; 34, base plate; 35, auxiliary telescopic rod; 36, push plate; 37, liquid guiding component; 38, oil storage component; 39, electric push rod; 30, synchronous plate; 310, hydraulic telescopic rod; 371, oil guiding cylinder; 372, hollow guiding rod; 373, liquid inlet hole; 374, sealing block; 375, annular sliding block; 376, liquid outlet hole; 377, connecting rod; 378, limiting ring; 379, compression spring; 3710, annular sliding plate; 3711, rubber ring; 381, mounting rack; 382, liquid storage cylinder; 383, positive and negative lead screw; 384, connecting plate; 385, piston rod; 386, connecting pipe; 71, displacement adjusting frame; 72, protective shell; 73, telescopic cylinder; 74, limiting sliding plate; 75, scraping plate; 76, torsion spring; 77, V-shaped frame. Detailed implementation manners

[0037] 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 efforts shall fall within the protection scope of the present invention.

[0038] Embodiment: Please refer to Figures 1-9 , the present invention provides a technical solution: a platform stabilizing device for laser 3D printing, including a chassis 1 and a cabinet door 2 rotatably connected to the outside of the chassis 1 through a hinge. A support device 3 is fixedly connected to the inside of the chassis 1. The top of the support device 3 is fixedly connected to a guiding and limiting frame 4. Both sides of the top of the guiding and limiting frame 4 are rotatably connected with conveying rollers 5. A conveyor belt 6 is sleeved on the outside of the conveying rollers 5. A scraping device 7 is slidably connected to the outside of the guiding and limiting frame 4; the chassis 1 provides stable external support and protection for the entire device, preventing external dust, impurities, etc. from entering and affecting the printing process. The cabinet door 2 facilitates the operator to perform internal operations, maintenance, and observe the printing situation. The conveying rollers 5 are driven by a motor to rotate on both sides of the top of the guiding and limiting frame 4, driving the conveyor belt 6 sleeved on the outside of it to circulate. The conveyor belt 6 is connected to the scraping device 7, providing power for the scraping device 7 so that it can slide along a specific path on the outside of the guiding and limiting frame 4 to achieve the scraping operation of the metal powder on the printing platform 32.

[0039] The support device 3 includes a three-slot platform lifting frame 31. A printing platform 32 is slidably connected to the center of the three-slot platform lifting frame 31. A main telescopic rod 33 is fixedly connected to the bottom of the printing platform 32. A base plate 34 is fixedly connected to the bottom of the main telescopic rod 33. An auxiliary telescopic rod 35 is fixedly connected to the bottom of the base plate 34. A push plate 36 is fixedly connected to the top of the auxiliary telescopic rod 35. An oil storage assembly 38 is fixedly connected to the center of the top of the base plate 34. Liquid guide assemblies 37 are fixedly connected to both sides of the oil storage assembly 38. Electric push rods 39 are fixedly connected to both sides of the base plate 34. A synchronous plate 30 is fixedly connected to the outside of the electric push rods 39. A hydraulic telescopic rod 310 is fixedly connected to the top of the base plate 34. The outside of the guiding and limiting frame 4 is fixedly connected to the inside of the chassis 1. The outside of the conveyor belt 6 is fixedly connected to the top of the scraping device 7. The outside of the three-slot platform lifting frame 31 is fixedly connected to the inside of the chassis 1. The inner wall of the bottom of the chassis 1 is fixedly connected to the bottom of the base plate 34. The bottom of the printing platform 32 is fixedly connected to the top of the hydraulic telescopic rod 310. The outside of the push plate 36 is slidably connected to both sides of the three-slot platform lifting frame 31. Both sides of the liquid guide assembly 37 are respectively fixedly connected to the bottoms of the main telescopic rod 33 and the auxiliary telescopic rod 35. The printing platform 32 at the center of the three-slot platform lifting frame 31 is the bearing surface for printing work. The lifting of the printing platform 32 is controlled by the hydraulic telescopic rod 310. When starting a new layer of printing, the hydraulic telescopic rod 310 contracts, causing the printing platform 32 to descend by a layer thickness. Among them, the two grooves on both sides of the three-slot platform lifting frame 31 are used to store metal powder. When the printing platform 32 descends, the main telescopic rod 33 descends synchronously with the hydraulic telescopic rod 310. At this time, the hydraulic oil in the main telescopic rod 33 enters the auxiliary telescopic rod 35 through the liquid guide assembly 37. At the same time, the auxiliary telescopic rod 35 pushes the push plate 36 to slide upward in the two grooves on both sides, pushing the metal powder upward to provide sufficient material for subsequent printing.

[0040] The scraping device 7 includes a displacement adjustment frame 71. A protective shell 72 is fixedly connected to the bottom of the displacement adjustment frame 71. Two sides of the protective shell 72 are slidably connected with limit sliding plates 74. A scraping plate 75 is rotatably connected to the outer side of the limit sliding plate 74. A torsion spring 76 is fixedly connected to one side of the scraping plate 75. A V-shaped frame 77 is fixedly connected to the other side of the scraping plate 75. The outer side of the displacement adjustment frame 71 is slidably connected with the outer side of the guiding and limiting frame 4. The top of the displacement adjustment frame 71 is fixedly connected to the top of the conveyor belt 6 through a clamping block. The top of the protective shell 72 is fixedly connected with a telescopic cylinder 73. The bottom end of the telescopic cylinder 73 is fixedly connected to the top of the limit sliding plate 74. The outer side of the limit sliding plate 74 is fixedly connected to the side of the torsion spring 76 away from the scraping plate 75. The V-shaped frames 77 are linearly arranged along the outer side of the scraping plate 75. The displacement adjustment frame 71 is fixed to the top of the conveyor belt 6 through a clamping block and slides on the outer side of the guiding and limiting frame 4 along with the movement of the conveyor belt 6, realizing the displacement adjustment of the scraping device 7 at different positions above the printing platform 32 to adapt to different printing requirements. The telescopic movement of the telescopic cylinder 73 can control the limit sliding plate 74 to slide on both sides of the protective shell 72, thereby adjusting the height of the scraping plate 75. The scraping plate 75 is rotatably connected to the limit sliding plate 74 through the torsion spring 76, enabling the scraping plate 75 to rotate when encountering resistance and return to its original position after the resistance disappears, better adapting to the surface condition of the powder. The V-shaped frames 77 are linearly arranged along the outer side of the scraping plate 75, which helps to improve the effect of the scraping plate 75 in leveling the powder.

[0041] The liquid guiding assembly 37 includes an oil guiding cylinder 371. A hollow guiding rod 372 is fixedly connected to the inner side of the oil guiding cylinder 371, and the hollow guiding rods 372 are arranged annularly along the inner wall of the oil guiding cylinder 371. An annular sliding block 375 is slidably connected to the outer wall of the hollow guiding rod 372. A sealing block 374 is fixedly connected to the inner side of the annular sliding block 375. A connecting rod 377 is fixedly connected to the inner side of the sealing block 374. Both sides of the oil guiding cylinder 371 are fixedly connected to the bottoms of the main telescopic rod 33 and the auxiliary telescopic rod 35 respectively. A liquid inlet hole 373 is formed in the wall of the hollow guiding rod 372 on the side close to the annular sliding block 375, and a liquid outlet hole 376 is formed in the wall of the hollow guiding rod 372 on the side far from the annular sliding block 375. The outer side of the annular sliding block 375 is slidably connected to the inner wall of the oil guiding cylinder 371. When the electric push rod 39 contracts, the synchronous plate 30 drives the connecting rod 377 in the liquid guiding assembly 37 to slide towards the side close to the oil guiding cylinder 371. At this time, the connecting rod 377 drives the annular sliding block 375 to slide through the sealing block 374. At this time, the inner wall of the annular sliding block 375 is separated from the liquid inlet hole 373, and at the same time, the outer wall of the annular sliding block 375 blocks the port of the connecting pipe 386. At this time, the hydraulic oil can be communicated in the oil guiding cylinder 371 through the liquid inlet hole 373 and the liquid outlet hole 376 formed on the surface of the hollow guiding rod 372, so as to realize the communication of the hydraulic oil in the main telescopic rod 33 and the auxiliary telescopic rod 35. When the printing platform 32 descends, the two push plates 36 can rise synchronously to push the metal powder, ensuring the uniformity of powder laying. When the electric push rod 39 extends, the synchronous plate 30 drives the connecting rod 377 to move in the reverse direction. At this time, the sealing block 374 moves synchronously, and drives the annular sliding block 375 to move together, blocking the liquid inlet hole 373 again. At the same time, as the annular sliding block 375 moves, the port of the connecting pipe 386 is reconnected to the inside of the oil guiding cylinder 371. At this time, the main telescopic rod 33 is communicated with the inside of the oil storage assembly 38 at the top of the substrate 34. Thus, the synchronous linkage between the main telescopic rod 33 and the auxiliary telescopic rod 35 can be disconnected. When cleaning the powder, the push plate 36 can be first displaced to the upper dead center, and then the synchronous linkage between the main telescopic rod 33 and the auxiliary telescopic rod 35 can be disconnected through the liquid guiding assembly 37. At this time, the printing platform 32 can be independently controlled to be at the upper dead center, so that the operator can more conveniently clean the metal powder attached to the surface of the printing platform 32, inside the three-slot platform lifting frame 31, and on the push plate 36, reducing the powder residue at the bottom of the groove.

[0042] The outer side of the connecting rod 377 is fixedly connected to the outer side of the synchronization plate 30. A compression spring 379 is fixedly connected to the outer wall of the connecting rod 377. An annular sliding plate 3710 is fixedly connected to the outer side of the compression spring 379. The inner side of the annular sliding plate 3710 is slidably connected to the outer side of the connecting rod 377. A rubber ring 3711 is fixedly connected to the outer side of the annular sliding plate 3710. A limiting ring 378 is fixedly connected to the inner side of the oil guiding cylinder 371. During the printing process, the electric push rod 39 continuously contracts until the outer wall of the annular sliding plate 3710 contacts and presses against the outer wall of the limiting ring 378 and then stops. At this time, the compression spring 379 is compressed under force, thereby forcing the rubber ring 3711 to be elastically deformed under force and closely adhere to the inner wall of the oil guiding cylinder 371. At this time, under the combined action of the annular sliding block 375 and the rubber ring 3711, the oil guiding cylinder 371 is in a closed state. Since the hydraulic oil in the main telescopic rod 33 cannot be discharged at this time, its length is fixed. Cooperating with the immovable hydraulic telescopic rod 310, it can stably support the printing platform 32 and avoid printing defects caused by platform instability.

[0043] The oil storage assembly 38 includes a mounting frame 381. A liquid storage cylinder 382 is fixedly connected to the top of the mounting frame 381. A positive and negative lead screw 383 is rotatably connected to the bottom of the mounting frame 381. A connecting plate 384 is threadedly connected to the outer wall of the positive and negative lead screw 383. A piston rod 385 is fixedly connected to the top of the connecting plate 384. A connecting pipe 386 is fixedly connected to the outer side of the liquid storage cylinder 382. The bottom of the mounting frame 381 is fixedly connected to the top of the substrate 34. The inner side of the liquid storage cylinder 382 is slidably connected to the outer side of the piston rod 385. The outer side of the connecting plate 384 is slidably connected to the inner wall of the mounting frame 381. One end of the connecting pipe 386 away from the liquid storage cylinder 382 is fixedly connected to the outer wall of the oil guiding cylinder 371. When the motor outside the mounting frame 381 drives the positive and negative lead screw 383 to rotate, the connecting plates 384 on both sides synchronously drive the piston rods 385 in the liquid storage cylinder 382 to move away from each other, and squeeze the hydraulic oil in the liquid storage cylinder 382 into the four main telescopic rods 33 through the connecting pipe 386 and the liquid guiding assembly 37, and cooperate with the hydraulic telescopic rod 310 to synchronously realize the lifting of the printing platform 32. In this way, a supporting force can be evenly provided below the printing platform 32 to avoid tilting or shaking of the printing platform 32 due to uneven force.

[0044] Working principle:

[0045] During use, the platform stabilizing device is arranged in the chassis 1 and is closed through the box door 2. Its core work focuses on the lifting of the printing platform 32 on the supporting device 3, the conveying and spreading of metal powder, and the leveling treatment of the powder by the scraping device 7;

[0046] The chassis 1 provides stable external support and protection for the entire device, preventing external dust, impurities, etc. from entering and affecting the printing process. The cabinet door 2 facilitates internal operation, maintenance, and observation of the printing situation by the operator. The conveyor roller 5 is driven by a motor to rotate on both sides of the top of the guiding and limiting frame 4, driving the conveyor belt 6 sleeved on its outer side to move in a cycle. The conveyor belt 6 is connected to the scraping device 7, providing power for the scraping device 7 so that it can slide along a specific path outside the guiding and limiting frame 4 to achieve the leveling operation of the metal powder on the printing platform 32.

[0047] In the support device 3, the printing platform 32 at the center of the three-slot platform lifting frame 31 is the bearing surface for printing work. The lifting of the printing platform 32 is controlled by the hydraulic telescopic rod 310. When starting a new layer of printing, the hydraulic telescopic rod 310 contracts, causing the printing platform 32 to descend by a layer thickness.

[0048] Among them, the two grooves on both sides of the three-slot platform lifting frame 31 are used to store metal powder. When the printing platform 32 descends, the main telescopic rod 33 descends synchronously with the hydraulic telescopic rod 310. At this time, the hydraulic oil in the main telescopic rod 33 enters the auxiliary telescopic rod 35 through the liquid guiding component 37. At the same time, the auxiliary telescopic rod 35 pushes the push plate 36 to slide upward in the two grooves, pushing the metal powder upward to provide sufficient material for subsequent printing.

[0049] When the electric push rod 39 contracts, the synchronous plate 30 drives the connecting rod 377 in the liquid guiding component 37 to slide towards the side close to the oil guiding cylinder 371. At this time, the connecting rod 377 drives the annular sliding block 375 to slide through the sealing block 374. At this time, the inner wall of the annular sliding block 375 is separated from the liquid inlet hole 373, and at the same time, the outer wall of the annular sliding block 375 blocks the port of the connecting pipe 386. At this time, the hydraulic oil can be communicated in the oil guiding cylinder 371 through the liquid inlet hole 373 and the liquid outlet hole 376 opened on the surface of the hollow guide rod 372, so that the hydraulic oil in the main telescopic rod 33 and the auxiliary telescopic rod 35 can be communicated. When the printing platform 32 descends, the two push plates 36 can rise synchronously to push the metal powder, ensuring the uniformity of powder laying.

[0050] During the printing process, the electric push rod 39 continuously contracts until the outer wall of the annular sliding plate 3710 contacts and presses against the outer wall of the limiting ring 378 and then stops. At this time, the compression spring 379 is compressed by force, forcing the rubber ring 3711 to be compressed and deformed elastically and to be in close contact with the inner wall of the oil guiding cylinder 371. At this time, under the combined action of the annular sliding block 375 and the rubber ring 3711, the oil guiding cylinder 371 is in a closed state. Since the hydraulic oil in the main telescopic rod 33 cannot be discharged at this time and its length is fixed, cooperating with the non-moving hydraulic telescopic rod 310, it can stably support the printing platform 32, avoiding printing defects caused by platform instability.

[0051] When the electric push rod 39 extends, the synchronous plate 30 drives the connecting rod 377 to move in the reverse direction. At this time, the sealing block 374 moves synchronously therewith, and drives the annular sliding block 375 to move together, blocking the liquid inlet hole 373 again. At the same time, with the movement of the annular sliding block 375, the port of the connecting pipe 386 is reconnected to the inside of the oil guide cylinder 371. At this time, the main telescopic rod 33 is communicated with the inside of the oil storage assembly 38 at the top of the substrate 34. Thus, the synchronous linkage between the main telescopic rod 33 and the auxiliary telescopic rod 35 can be disconnected. When cleaning the powder, the push plate 36 can be first displaced to the top dead center, and then the synchronous linkage between the main telescopic rod 33 and the auxiliary telescopic rod 35 can be disconnected through the liquid guide assembly 37. At this time, the printing platform 32 can be independently controlled to be at the top dead center, so that the operator can more conveniently clean the metal powder attached to the surface of the printing platform 32, inside the three-slot platform lifting frame 31, and on the push plate 36, reducing the powder residue at the bottom of the groove.

[0052] When the motor outside the mounting frame 381 drives the positive and negative lead screw 383 to rotate, the connecting plates 384 on both sides synchronously drive the piston rods 385 in the liquid storage cylinder 382 to move away from each other, and squeeze the hydraulic oil in the liquid storage cylinder 382 into the four main telescopic rods 33 through the connecting pipe 386 and the liquid guide assembly 37, and cooperate with the hydraulic telescopic rod 310 to synchronously realize the lifting of the printing platform 32, so as to evenly provide a supporting force under the printing platform 32 and prevent the printing platform 32 from tilting or shaking due to uneven force;

[0053] The displacement adjustment frame 71 is fixed to the top of the conveyor belt 6 through a block, and slides outside the guiding and limiting frame 4 along with the movement of the conveyor belt 6, realizing the displacement adjustment of the scraping device 7 at different positions above the printing platform 32 to adapt to different printing requirements. The expansion and contraction of the telescopic cylinder 73 can control the sliding of the limiting slide plate 74 on both sides of the protective shell 72, thereby adjusting the height of the scraping plate 75. The scraping plate 75 is rotatably connected to the limiting slide plate 74 through a torsion spring 76, so that the scraping plate 75 can rotate when encountering resistance and return to its original position after the resistance disappears, better adapting to the powder surface condition. The V-shaped frames 77 are linearly arranged along the outside of the scraping plate 75, which helps to improve the effect of the scraping plate 75 in scraping the powder flat.

[0054] It should be noted that in this document, 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 terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so 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. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0055] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A platform stabilizing device for laser 3D printing, comprising a chassis (1) and a door (2) rotatably connected to the outside of the chassis (1) by a hinge, characterized in that: A support device (3) is fixedly connected to the inner side of the chassis (1). A guiding and limiting frame (4) is fixedly connected to the top of the support device (3). Conveyor rollers (5) are rotatably connected to both sides of the top of the guiding and limiting frame (4). A conveyor belt (6) is sleeved on the outside of the conveyor rollers (5). A scraping device (7) is slidably connected to the outside of the guiding and limiting frame (4); The support device (3) includes a three-slot platform lifting frame (31). A printing platform (32) is slidably connected to the center of the three-slot platform lifting frame (31). A main telescopic rod (33) is fixedly connected to the bottom of the printing platform (32). A substrate (34) is fixedly connected to the bottom of the main telescopic rod (33). An auxiliary telescopic rod (35) is fixedly connected to the bottom of the substrate (34). A push plate (36) is fixedly connected to the top of the auxiliary telescopic rod (35). An oil storage component (38) is fixedly connected to the center of the top of the substrate (34). Liquid guiding components (37) are fixedly connected to both sides of the oil storage component (38). Electric push rods (39) are fixedly connected to both sides of the substrate (34). A synchronous plate (30) is fixedly connected to the outside of the electric push rods (39). A hydraulic telescopic rod (310) is fixedly connected to the top of the substrate (34); The scraping device (7) includes a displacement adjusting frame (71). A protective shell (72) is fixedly connected to the bottom of the displacement adjusting frame (71). Limit sliding plates (74) are slidably connected to both sides of the protective shell (72). Scrapers (75) are rotatably connected to the outside of the limit sliding plates (74). A torsion spring (76) is fixedly connected to one side of the scraper (75). A V-shaped frame (77) is fixedly connected to the other side of the scraper (75).

2. The platform stabilizing device for laser 3D printing according to claim 1, characterized in that: The outside of the guiding and limiting frame (4) is fixedly connected to the inner side of the chassis (1). The outside of the conveyor belt (6) is fixedly connected to the top of the scraping device (7). The outside of the three-slot platform lifting frame (31) is fixedly connected to the inner side of the chassis (1). The bottom inner wall of the chassis (1) is fixedly connected to the bottom of the substrate (34).

3. The platform stabilizing device for laser 3D printing according to claim 1, wherein: The bottom of the printing platform (32) is fixedly connected to the top of the hydraulic telescopic rod (310). The outside of the push plate (36) is slidably connected to both sides of the three-slot platform lifting frame (31). Both sides of the liquid guiding component (37) are respectively fixedly connected to the bottoms of the main telescopic rod (33) and the auxiliary telescopic rod (35).

4. A platform stabilizing device for laser 3D printing according to claim 1, characterized in that: The outside of the displacement adjusting frame (71) is slidably connected to the outside of the guiding and limiting frame (4). The top of the displacement adjusting frame (71) is fixedly connected to the top of the conveyor belt (6) through a block. A telescopic cylinder (73) is fixedly connected to the top of the protective shell (72).

5. A platform stabilizing device for laser 3D printing according to claim 1, characterized in that: The bottom end of the telescopic cylinder (73) is fixedly connected to the top of the limit slide plate (74). The outer side of the limit slide plate (74) is fixedly connected to the side of the torsion spring (76) away from the scraping plate (75). The V-shaped frames (77) are linearly arranged along the outer side of the scraping plate (75).

6. The platform stabilizing device for laser 3D printing according to claim 1, characterized in that: The liquid guiding assembly (37) includes an oil guiding cylinder (371). A hollow guiding rod (372) is fixedly connected to the inner side of the oil guiding cylinder (371), and the hollow guiding rods (372) are arranged annularly along the inner wall of the oil guiding cylinder (371). An annular sliding block (375) is slidably connected to the outer wall of the hollow guiding rod (372). A sealing block (374) is fixedly connected to the inner side of the annular sliding block (375). A connecting rod (377) is fixedly connected to the inner side of the sealing block (374).

7. The platform stabilizing device for laser 3D printing according to claim 6, wherein: Both sides of the oil guiding cylinder (371) are fixedly connected to the bottoms of the main telescopic rod (33) and the auxiliary telescopic rod (35) respectively. A liquid inlet hole (373) is formed in the wall of the hollow guiding rod (372) on the side close to the annular sliding block (375). A liquid outlet hole (376) is formed in the wall of the hollow guiding rod (372) on the side away from the annular sliding block (375). The outer side of the annular sliding block (375) is slidably connected to the inner wall of the oil guiding cylinder (371).

8. A platform stabilizing device for laser 3D printing according to claim 6, characterized in that: The outer side of the connecting rod (377) is fixedly connected to the outer side of the synchronous plate (30). A compression spring (379) is fixedly connected to the outer wall of the connecting rod (377). An annular sliding plate (3710) is fixedly connected to the outer side of the compression spring (379). The inner side of the annular sliding plate (3710) is slidably connected to the outer side of the connecting rod (377). A rubber ring (3711) is fixedly connected to the outer side of the annular sliding plate (3710). A limit ring (378) is fixedly connected to the inner side of the oil guiding cylinder (371).

9. The platform stabilizing device for laser 3D printing according to claim 1, wherein: The oil storage assembly (38) includes a mounting frame (381). A liquid storage cylinder (382) is fixedly connected to the top of the mounting frame (381). A positive and negative lead screw (383) is rotatably connected to the bottom of the mounting frame (381). A connecting plate (384) is threadedly connected to the outer wall of the positive and negative lead screw (383). A piston rod (385) is fixedly connected to the top of the connecting plate (384). A connecting pipe (386) is fixedly connected to the outer side of the liquid storage cylinder (382).

10. A platform stabilizing device for laser 3D printing according to claim 9, characterized in that: The bottom of the mounting frame (381) is fixedly connected to the top of the substrate (34). The inner side of the liquid storage cylinder (382) is slidably connected to the outer side of the piston rod (385). The outer side of the connecting plate (384) is slidably connected to the inner wall of the mounting frame (381). One end of the connecting pipe (386) away from the liquid storage cylinder (382) is fixedly connected to the outer wall of the oil guiding cylinder (371).

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