High-stability forming platform for laser powder bed melting

Abstract

The invention relates to the technical field of laser melting, in particular to a high-stability laser powder bed melting forming platform which comprises an operation platform. And the pasting assembly comprises a fixing rod, the side surface of the fixing rod is fixedly connected with a connecting sleeve, the interior of the connecting sleeve is movably connected with a U-shaped rod, and a second spring is movably connected between the tail end of the U-shaped rod and the inner wall of the bottom of the connecting sleeve. According to the high-stability forming platform for laser powder bed melting, one side of a repairing piece is tightly attached to the inner wall of a repairing piece through the attaching assembly, so that a gap is prevented from being formed between the repairing piece and the inner wall of the repairing piece, metal powder is prevented from being dissipated through the gap between the repairing piece and the repairing piece, and melt can be prevented from dripping; and the metal powder, the repairing piece and the repairing piece can be mutually melted during melting, so that the structural strength, the sealing performance and the stability of the repairing position are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser melting, and particularly to a forming platform for laser powder bed melting with high stability. Background Technique

[0002] The forming platform used in laser powder bed melting (L-PBF) is an important part of the additive manufacturing system. The forming platform for laser powder bed melting is a key component in the laser powder bed melting equipment, which is used to support and position the powder material to be printed, and ensure that the powder can be accurately melted and solidified according to the preset three-dimensional model under the action of the laser.

[0003] When repairing a workpiece by laser melting, especially when repairing a workpiece with a curved surface structure and a through defect, during melting, the molten material will fall from the notch position, and the powder is not easily attached to the notch position, resulting in low melting efficiency. Moreover, the dripping molten material adheres to the inner wall of the workpiece and is not easy to clean, thereby reducing the repair efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a forming platform for laser powder bed melting with high stability, so as to solve the problem raised in the above background technique that especially when repairing a workpiece with a curved surface structure and a through defect, during melting, the molten material will fall from the notch position, and the powder is not easily attached to the notch position, resulting in low melting efficiency. Moreover, the dripping molten material adheres to the inner wall of the workpiece and is not easy to clean, thereby reducing the repair efficiency. To achieve the above purpose, the present invention provides the following technical solution: A forming platform for laser powder bed melting with high stability, including an operation platform;

[0005] A pasting assembly, the pasting assembly includes a fixed rod, a connecting sleeve is fixedly connected to the side surface of the fixed rod, a U-shaped rod is movably connected inside the connecting sleeve, a second spring is movably connected between the end of the U-shaped rod and the bottom inner wall of the connecting sleeve, a fixing piece is fixedly sleeved on the side surface of one of the U-shaped rods, a connecting rod is fixedly connected to the opposite side of the two fixing pieces, rotating sleeves are movably sleeved on the side surfaces of the remaining two U-shaped rods, a clamping piece is movably sleeved on the side surface of the connecting rod, a first spring is fixedly connected to the opposite side of the clamping piece and the fixing piece, and the first spring is movably sleeved on the connecting rod. A repair piece is clamped on the opposite side of the two clamping pieces by the acting force of the first spring;

[0006] Adjusting assembly, the adjusting assembly includes a lifting block, a lead screw is connected inside the lifting block by a thread, a sliding rod is movably connected inside the lifting block, one end of the sliding rod is fixedly connected to a movable block, one side of the top of the movable block is fixedly connected to a driving motor, the output shaft end of the driving motor is fixedly connected to one end of the lead screw, one side of the top of the operating platform is fixedly connected to a push rod motor, the output end of the push rod motor is fixedly connected to one side of the movable block, and a clamping assembly is arranged on the top of the operating platform.

[0007] Further preferably, there are two clamping assemblies. The clamping assembly includes a fixed block. The bottom of the fixed block is fixedly connected to the top of the operating platform. One side of the fixed block is movably connected to a bidirectional threaded rod through a bearing. A chute is opened on the top of the operating platform. A slider is slidably connected inside the chute. The top of the slider is fixedly connected to a clamping arm and one end of the bidirectional threaded rod passes through the two clamping arms in sequence and is threadedly connected. One side of one of the clamping arms is fixedly connected to a support rod and the other end of the support rod completely passes through the other clamping arm and is movably connected. The other end of the bidirectional threaded rod is fixedly connected to an adjusting knob.

[0008] Further preferably, a repair part is clamped between the opposite sides of two adjacent clamping arms, and a repair hole is opened inside the repair part.

[0009] Further preferably, one side of the repair patch abuts against the inner wall of the repair part, and the repair patch is used to seal the repair hole.

[0010] Further preferably, the repair patch is made of an elastically deformable metal material, and the side surface of the rotating sleeve abuts against one side of the repair patch.

[0011] Further preferably, a plurality of U-shaped rods are distributed in a fan shape with the central axis of the fixed rod as the center, and one end of the fixed rod is fixedly connected to one side of the lifting block.

[0012] Further preferably, the bottom of the movable block is movably connected to the top of the operating platform through the same chute and slider as the bottom of the clamping arm.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] In the present invention, the repair hole on the inner wall of the repair part is sealed by the repair patch, so that the powder can be carried on the repair patch, which is convenient for laser melting, avoids the molten material from dripping from the repair hole, ensures the stability and effective repair during melting, and avoids the subsequent cleaning of the dripping molten material.

[0015] In the present invention, one side of the patch sheet is tightly attached to the inner wall of the repair part through the application component, thereby avoiding the formation of a gap between the patch sheet and the inner wall of the repair part, avoiding the metal powder from escaping through the gap between the repair part and the patch sheet, and avoiding the molten material from dripping, so that the molten material can be easily attached to the position of the repair hole, and the metal powder, the patch sheet and the repair part can be melted together during melting, thereby improving the structural strength, sealing and stability of the repair position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the exploded structure of the application assembly of the present invention;

[0019] Figure 4 It is a schematic diagram of the top view structure of the present invention;

[0020] Figure 5 For the present invention Figure 4 Schematic diagram of the cross-sectional structure at A in the middle;

[0021] Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0022] Figure 7 For the present invention Figure 5 Enlarged structural diagram at point C in the middle.

[0023] In the figure: 1. operating platform; 2. application component; 3. adjustment component; 4. clamping component; 5. repair part; 6. repair hole; 201. fixing rod; 202. connecting sleeve; 203. U-shaped rod; 204. fixing plate; 205. connecting rod; 206. clamping plate; 207. first spring; 208. second spring; 209. rotating sleeve; 210. repair plate; 301. lifting block; 302. sliding rod; 303. driving motor; 304. screw rod; 305. movable block; 306. push rod motor; 401. fixing block; 402. slide groove; 403. slider; 404. clamping arm; 405. two-way threaded rod; 406. supporting rod; 407. adjusting button. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 - 7 , the present invention provides a technical solution: a forming platform for laser powder bed melting with high stability, including an operation platform 1;

[0026] A pasting component 2, the pasting component 2 includes a fixing rod 201, a connecting sleeve 202 is fixedly connected to the side surface of the fixing rod 201, a U-shaped rod 203 is movably connected inside the connecting sleeve 202, and a second spring 208 is movably connected between the end of the U-shaped rod 203 and the bottom inner wall of the connecting sleeve 202. A fixing piece 204 is fixedly sleeved on the side surface of one of the U-shaped rods 203, a connecting rod 205 is fixedly connected to the opposite sides of the two fixing pieces 204, and rotating sleeves 209 are movably sleeved on the side surfaces of the remaining two U-shaped rods 203. A clamping piece 206 is movably sleeved on the side surface of the connecting rod 205, a first spring 207 is fixedly connected to the opposite sides of the clamping piece 206 and the fixing piece 204, and the first spring 207 is movably sleeved on the connecting rod 205. A repair piece 210 is clamped by the acting force of the first spring 207 on the top of the opposite sides of the two clamping pieces 206;

[0027] An adjusting component 3, the adjusting component 3 includes a lifting block 301, a lead screw 304 is connected to the inside of the lifting block 301 by a thread, a sliding rod 302 is movably connected to the inside of the lifting block 301, one end of the sliding rod 302 is fixedly connected to a movable block 305, a driving motor 303 is fixedly connected to one side of the top of the movable block 305, the output shaft end of the driving motor 303 is fixedly connected to one end of the lead screw 304, a push rod motor 306 is fixedly connected to one side of the top of the operation platform 1, the output end of the push rod motor 306 is fixedly connected to one side of the movable block 305, and a clamping component 4 is arranged on the top of the operation platform 1.

[0028] In this embodiment, as Figure 2 , Figure 3 and Figure 5As shown, there are two clamping assemblies 4. The clamping assembly 4 includes a fixed block 401. The bottom of the fixed block 401 is fixedly connected to the top of the operating platform 1. One side of the fixed block 401 is movably connected with a bidirectional threaded rod 405 through a bearing. A chute 402 is opened on the top of the operating platform 1. A slider 403 is slidably connected inside the chute 402. A clamping arm 404 is fixedly connected to the top of the slider 403, and one end of the bidirectional threaded rod 405 passes through the two clamping arms 404 in sequence and is threadedly connected. A support rod 406 is fixedly connected to one side of one of the clamping arms 404, and the other end of the support rod 406 completely passes through the other clamping arm 404 and is movably connected. The other end of the bidirectional threaded rod 405 is fixedly connected with an adjustment knob 407. When in use, by rotating the two adjustment knobs 407, the bidirectional threaded rod 405 rotates, so that the clamping arms 404 clamp the repair part 5, and the repair hole 6 is placed upward. Then, a repair patch 210 of a suitable size is cut according to the size of the repair hole 6, and the two sides of the repair patch 210 are clamped by the clip 206. Then, the push rod motor 306 is started, so that the output end of the push rod motor 306 pushes the fixed rod 201 to send the repair patch 210 into the repair part 5 and make the repair patch 210 correspond to the repair hole 6. Then, the drive motor 303 is started, so that the lifting block 301 is lifted through the lead screw 304. As the fixed rod 201 is lifted, both ends of the repair patch 210 gradually contact the inner wall of the repair part 5, and under the reaction force, the repair patch 210 gradually bends. As the U-shaped rod 203 contracts to the limit through the second spring 208 and the connecting sleeve 202, at this time, one side of the repair patch 210 abuts against the two rotating sleeves 209, so that the other side of the repair patch 210 is closely attached to the inner wall of the repair part 5. Then, laser melting is carried out. During laser melting, the metal powder, the metal around the repair hole 6 and the repair patch 210 are melted, so that the three are fused with each other, and the repaired repair hole 6 has good stability, sealing performance and strength. After the repair is completed, the inner and outer walls of the original repair hole 6 position on the repair part 5 are polished, and the repair operation is completed.

[0029] In this embodiment, as Figure 2 , Figure 3 and Figure 5 shown, a repair part 5 is clamped between the opposite sides of two adjacent clamping arms 404, and a repair hole 6 is opened inside the repair part 5.

[0030] In this embodiment, as Figure 2 , Figure 3 and Figure 5 shown, one side of the repair patch 210 abuts against the inner wall of the repair part 5, and the repair patch 210 is used to close the repair hole 6.

[0031] In this embodiment, as Figure 2 , Figure 3 and Figure 5As shown, the patch 210 is made of an elastically deformable metal material, and the side surface of the rotating sleeve 209 abuts against one side of the patch 210.

[0032] In this embodiment, as Figure 2 , Figure 3 and Figure 5 shown, multiple U-shaped rods 203 are distributed in a fan shape with the central axis of the fixed rod 201, and one end of the fixed rod 201 is fixedly connected to one side of the lifting block 301.

[0033] In this embodiment, as Figure 2 , Figure 3 and Figure 5 shown, the bottom of the movable block 305 is movably connected to the top of the operation platform 1 through the same chute 402 and slider 403 as the bottom of the clamping arm 404.

[0034] Usage method and advantages of the present invention: For the high-stability forming platform for laser powder bed fusion, during use, the working process is as follows:

[0035] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 shown, during use, by rotating two adjusting knobs 407, the bidirectional threaded rod 405 rotates, so that the clamping arm 404 clamps the repair part 5, and the repair hole 6 is placed upward. Then, according to the size of the repair hole 6, a patch 210 of appropriate size is cut, and the two sides of the patch 210 are clamped by the clip 206. Then, the push rod motor 306 is started, so that the output end of the push rod motor 306 pushes the fixed rod 201 to send the patch 210 into the repair part 5 and make the patch 210 correspond to the repair hole 6. Then, the drive motor 303 is started, so that the lifting block 301 is lifted through the lead screw 304. As the fixed rod 201 is lifted, both ends of the patch 210 gradually contact the inner wall of the repair part 5, and under the reaction force, the patch 210 gradually bends. As the U-shaped rod 203 contracts to the limit through the second spring 208 and the connecting sleeve 202, at this time, one side of the patch 210 abuts against the two rotating sleeves 209, so that the other side of the patch 210 is closely attached to the inner wall of the repair part 5. Then, laser melting is carried out. During laser melting, the metal powder, the metal around the repair hole 6, and the patch 210 are melted, so that the three are fused with each other, making the repaired repair hole 6 have good stability, sealing performance and strength. After the repair is completed, the inner and outer walls of the original repair hole 6 position on the repair part 5 are polished, and the repair operation is completed.

[0036] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A high-stability laser powder bed fusion molding platform, characterized in that: comprising an operating platform (1); The patch assembly (2) comprises a fixing rod (201), a connecting sleeve (202) being fixedly connected to the side surface of the fixing rod (201), a U-shaped rod (203) being movably connected inside the connecting sleeve (202), a second spring (208) being movably connected between the end of the U-shaped rod (203) and the bottom inner wall of the connecting sleeve (202), a fixing sheet (204) being fixedly sleeved to the side surface of one of the U-shaped rods (203), and two fixing sheets (204) being fixedly sleeved on opposite sides thereof. The U-shaped rods (203) are fixedly connected with a connecting rod (205), and the side surfaces of the other two U-shaped rods (203) are movably sleeved with a rotating sleeve (209). The side surface of the connecting rod (205) is movably sleeved with a clamping piece (206). The side of the clamping piece (206) opposite to the fixed sheet (204) is fixedly connected with a first spring (207), and the first spring (207) is movably sleeved on the connecting rod (205). The tops of the opposite sides of the two clamping pieces (206) are clamped with a repairing piece (210) by the action of the first spring (207); An adjustment component (3), the adjustment component (3) comprising a lifting block (301), the lifting block (301) being internally connected to a lead screw (304) via a threaded connection, the lifting block (301) being internally movably connected to a slide bar (302), one end of the slide bar (302) being fixedly connected to a movable block (305), one side of the top of the movable block (305) being fixedly connected to a drive motor (303), the output shaft end of the drive motor (303) being fixedly connected to one end of the lead screw (304), one side of the top of the operating platform (1) being fixedly connected to a push rod motor (306), the output end of the push rod motor (306) being fixedly connected to one side of the movable block (305), and a clamping component (4) being arranged on the top of the operating platform (1).

2. A high-stability laser powder bed fusion forming platform according to claim 1, characterized in that: There are two clamping assemblies (4), and the clamping assemblies (4) include a fixed block (401), the bottom of the fixed block (401) is fixedly connected to the top of the operating platform (1), one side of the fixed block (401) is movably connected to a bidirectional threaded rod (405) via a bearing, the top of the operating platform (1) is provided with a slide groove (402), the interior of the slide groove (402) is slidably connected to a slider (403), the top of the slider (403) is fixedly connected to a clamping arm (404), and one end of the bidirectional threaded rod (405) passes through two clamping arms (404) in sequence for threaded connection, one side of one of the clamping arms (404) is fixedly connected to a support rod (406), and the other end of the support rod (406) completely passes through the other clamping arm (404) for movably connection, and the other end of the bidirectional threaded rod (405) is fixedly connected to an adjustment button (407).

3. A high-stability laser powder bed fusion forming platform according to claim 2, characterized in that: The repair component (5) is clamped on opposite sides of two adjacent clamping arms (404), and a repair hole (6) is provided inside the repair component (5).

4. The high-stability laser powder bed fusion forming platform according to claim 1, characterized in that: One side of the repair sheet (210) abuts against the inner wall of the repair component (5), and the repair sheet (210) is used to close the repair hole (6).

5. The high-stability laser powder bed fusion forming platform according to claim 1, characterized in that: The patch (210) is made of elastically deformable metal material, and the side surface of the rotating sleeve (209) abuts against one side of the patch (210).

6. The high-stability laser powder bed fusion forming platform according to claim 1, characterized in that: The plurality of U-shaped rods (203) are distributed in a fan shape around the central axis of the fixing rod (201), and one end of the fixing rod (201) is fixedly connected to one side of the lifting block (301).

7. The high-stability laser powder bed fusion forming platform according to claim 1, characterized in that: The bottom of the movable block (305) is movably connected to the top of the operating platform (1) via a sliding groove (402) and a sliding block (403) that are the same as the bottom of the clamping arm (404).

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