A laser sintering molding machine

Abstract

This invention relates to the field of laser sintering equipment technology, and particularly to a laser sintering forming machine, comprising a processing box with a rotatable cover on its side; a first cubic support frame fixed inside the processing box for supporting the processing box; a second cubic support frame fixed inside the processing box and located on one side of the first cubic support frame, also for supporting the processing box; and a processing table assembly. The laser sintering forming machine provided by this invention has two cubic support frames, namely the first cubic support frame and the second cubic support frame, arranged inside the processing box to form a frame structure. The processing table assembly, the printhead printing mechanism, and the laser sintering mechanism are then arranged within the two cubic support frames, resulting in a higher quality microstructure, improved vibration resistance, and reduced vibration during use.

Description

Technical Field

[0001] This invention relates to the field of laser sintering equipment technology, specifically to a laser sintering forming machine. Background Technology

[0002] Selective laser sintering (SLS) is an additive manufacturing technology that uses laser light as an energy source to sinter powder materials. Its working principle is roughly as follows: The designed 3D model is imported into the 3D printer, printing parameters are set according to the model's structure and dimensions, and printing begins. After printing, the printed ceramic product needs to be sintered. This process transforms the ceramic powder into a solid ceramic product. The powder material is sintered together under high-intensity laser irradiation, forming the cross-section of the part and bonding it to the already formed parts below. One layer is completed before proceeding to the next, and so on. After all layers are sintered, excess powder is removed, resulting in the sintered and formed part.

[0003] Chinese patent application CN110549607B discloses a laser sintering 3D printer, including a retractable forming cylinder and a powder supply and spreading mechanism to solve sealing and cleaning problems. The retractable forming cylinder is connected to the upper and lower cylinders by a telescopic structure, and the entire device is in a sealed state. This solves the sealing problem and improves the quality of the formed parts. In addition, since the worktable and forming cylinder are seamlessly connected, the cleaning problem is effectively solved. The powder supply and spreading mechanism uses a dynamic scraper to maximize the protection of the scraper device; the spiral powder supply method can evenly distribute the powder in the powder supply sleeve and then evenly spread the powder on the worktable. The spiral structure has a large space, which can achieve both high-quality powder spreading effect and improved powder spreading efficiency.

[0004] As mentioned in the above application, the laser sintering device in the prior art is generally a box-type structure with a sintering mechanism installed inside for sintering the printed ceramic material. The processing box is equipped with a processing table for additive manufacturing. Due to the limited internal space and narrow working area of ​​the processing box, it is inconvenient for operators to take out the finished parts. Summary of the Invention

[0005] To address the above problems, the present invention provides a laser sintering forming machine.

[0006] This invention adopts the following technical solution: a laser sintering forming machine, comprising:

[0007] The processing box has a rotating and openable cover on its side;

[0008] The first cubic support frame is fixed inside the processing box and is used to support the processing box;

[0009] The second cubic support frame is fixed inside the processing box and located on one side of the first cubic support frame, and is also used to support the processing box.

[0010] A processing table assembly, on which a processing table surface is movably disposed, the processing table surface being able to move back and forth within a first cubic support frame and a second cubic support frame for position adjustment.

[0011] The processing table has an additive manufacturing state and an additive output state. In the additive manufacturing state, the processing table is perpendicular to the first crossbeam. In the additive output state, the processing table is horizontal to the first crossbeam. When the processing table is moved outside the processing box, the linkage mechanism synchronously drives the processing table to switch from the additive manufacturing state to the additive output state.

[0012] As a further description of the above technical solution, it also includes:

[0013] The printhead printing mechanism, which is located on top of the first cubic support frame, is used to print 3D products on the processing table.

[0014] The laser sintering mechanism, located on top of the second cubic support frame, is used to sinter the printed 3D products.

[0015] As a further description of the above technical solution: the processing table assembly includes two parallel first crossbeams and second crossbeams. The first crossbeam and the second crossbeam are both fixed in a rectangular frame on one side of the first cubic support frame. A first guide rod perpendicular to the second crossbeam is fixed between the first crossbeam and the first cubic support frame. A first sliding seat is slidably connected to the first guide rod.

[0016] A concave guide rail is vertically welded to the first sliding seat, and one end of the concave guide rail extends away from the first sliding seat into the interior of the second cubic support frame. A slider is movably connected to the lower surface of the processing table. The slider is slidably connected to the concave guide rail. A first electric push rod is fixed between the first sliding seat and the slider. The extension and retraction of the first electric push rod drives the processing table to move back and forth on the concave guide rail.

[0017] A first lead screw motor is fixed on the second crossbeam. The output shaft of the first lead screw motor is fixed to the first lead screw through a coupling. A first lead screw nut seat is installed on the first sliding seat, and the first lead screw nut seat is threadedly connected to the first lead screw to control the rotation of the first lead screw. The first lead screw nut seat can drive the machining table to adjust its height.

[0018] As a further description of the above technical solution: the two vertical sections of the concave guide rail frame are rotatably connected to an extension rail via a connecting shaft, and a sector-shaped seat is fixed on the lower surface of the extension rail, and a rectangular rack is welded and fixed on the sector-shaped seat.

[0019] As a further description of the above technical solution: there are four sliders in total, and a circular seat is provided at the center of the four sliders. The outer wall of the circular seat is fixedly connected to the slider through a connecting block. An annular groove is provided on the upper surface of the circular seat. An arc-shaped block is welded to the lower surface of the processing table. The arc-shaped block is slidably connected to the annular groove. A toothed ring is welded to the back of the processing table outside the arc-shaped block.

[0020] The linkage mechanism includes a strip seat, a strip seat welded between two parallel connecting blocks, a rotating shaft rotatably connected to the strip seat, a first gear disk welded to one end of the rotating shaft and meshing with a gear ring, and a second gear disk welded to the other end of the rotating shaft;

[0021] A torsion spring is sleeved on the rotating shaft between the first gear disk and the bar seat. The bottom end of the torsion spring is fixed on the first gear disk, and the top end of the torsion spring is fixed on the bar seat.

[0022] A drive seat is fixed on the concave guide rail frame. The drive seat has an L-shaped structure and a servo motor is fixed on the drive seat. The output shaft of the servo motor is fixedly connected to the connecting shaft and is used to drive the connecting shaft to rotate.

[0023] As a further description of the above technical solution: the printhead printing mechanism includes two parallel second guide rods, the two second guide rods are fixed inside the top of the first cubic support frame, and a second sliding seat is slidably arranged on each of the two second guide rods. Two third guide rods are fixed between the two second sliding seats, and a printhead is slidably connected to the two third guide rods. A main printhead is installed at the center of the lower surface of the printhead, and several auxiliary printheads are installed around the lower surface of the printhead outside the main printhead.

[0024] As a further description of the above technical solution: the first cube support frame is also provided with a first driving mechanism, which is used to drive the printing base to perform horizontal and vertical position adjustments.

[0025] As a further description of the above technical solution: the first driving mechanism includes a first driving motor fixed on the first cubic support frame and two parallel first rotating shafts. The two first rotating shafts are rotatably connected to the inner top of the first cubic support frame. The two first rotating shafts are perpendicular to each other and the two second guide rods are offset from each other. The two first rotating shafts are connected to each other by a second belt drive. The first driving motor is connected to one of the first rotating shafts by a first belt drive. It should be noted that the first belt is connected to both the first rotating shaft and the first driving motor by a pulley. The second belt is connected and fixed to the second sliding seat. When the second belt moves, it drives the second sliding seat to move on the second guide rod.

[0026] The first drive mechanism also includes a second lead screw motor, which is embedded and fixed on the second sliding seat. The output shaft of the second lead screw motor is fixedly connected to the second lead screw through a coupling. The second lead screw is threadedly connected to the print head. By rotating the second lead screw in both directions, the print head is driven to move back and forth on the third guide rod to adjust its position.

[0027] As a further description of the above technical solution: the laser sintering mechanism includes two parallel fourth guide rods, the two fourth guide rods are fixed inside the top of the second cubic support frame, each of the two fourth guide rods is slidably provided with a third sliding seat, and a fifth guide rod is fixed between the two third sliding seats, and a sintering seat is slidably installed on the fifth guide rod.

[0028] As a further description of the above technical solution: a substrate is welded to the lower surface of the sintering seat, a laser is mounted on the substrate, and an inclined mounting seat is bolted to one end of the sintering seat along the length direction. A galvanometer for use with the laser is mounted on the inclined mounting seat.

[0029] As a further description of the above technical solution: the second cubic support frame is also provided with a second driving mechanism, which is used to drive the sintering seat to perform lateral and longitudinal position adjustments.

[0030] As a further description of the above technical solution: the second drive mechanism includes a second drive motor and two parallel second rotating shafts. The two parallel second rotating shafts are rotatably connected to the top of the inside of the second cubic support frame. The output shaft of the second drive motor is connected to one of the second rotating shafts via a third belt. The two second rotating shafts are connected via a fourth belt, and the fourth belt is fixedly connected to the third sliding seat. The movement of the fourth belt can drive the third sliding seat to move on the fourth guide rod for position adjustment.

[0031] As a further description of the above technical solution: the second drive mechanism also includes a third lead screw motor, which is embedded in one of the third sliding seats. A third lead screw is fixed to the output shaft of the third lead screw motor. The third lead screw is threadedly connected to the sintering seat and drives the third lead screw to rotate in both directions, thereby driving the sintering seat to move back and forth on the fifth guide rod for position adjustment.

[0032] Beneficial effects

[0033] This invention provides a laser sintering molding machine, which is equipped with a processing box. The overall structure is enclosed, reducing the interference of the external environment on the printing and sintering of materials. Two cubic support frames, namely a first cubic support frame and a second cubic support frame, are set inside the processing box to form a frame structure. The processing table assembly, the nozzle printing mechanism, and the laser sintering mechanism are then set within the two cubic support frames, thereby improving the overall strength of the laser sintering molding machine, obtaining a better quality microstructure, improving its vibration resistance, reducing vibration during use, and improving precision.

[0034] Furthermore, this laser sintering molding machine integrates a printhead printing mechanism and a laser sintering mechanism. The printhead printing mechanism is located inside the top of the first cubic support frame, and the laser sintering mechanism is located inside the top of the second cubic support frame. The processing table on the processing table assembly can move back and forth within the first and second cubic support frames to adjust its position, thereby achieving integrated printing and sintering. This eliminates the need to transfer the printed model, reducing transfer steps and overcoming the problems of defective products and damage caused by transfer.

[0035] Finally, the processing table of this laser sintering forming machine can also be adjusted vertically in height and horizontally in position. Then, under the setting of the first drive mechanism and the laser sintering mechanism, both the nozzle printing mechanism and the laser sintering mechanism can be adjusted horizontally and vertically. The combination of the processing table and the nozzle printing mechanism or the processing table and the laser sintering mechanism enables the device to achieve high-precision manufacturing of complex-shaped parts. Attached Figure Description

[0036] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0037] Figure 1 This is a schematic diagram of the structure of a laser sintering forming machine provided by the present invention;

[0038] Figure 2 Schematic diagrams of the first and second cubic support frames provided by the present invention;

[0039] Figure 3This is a schematic diagram of the structure of the processing table assembly provided by the present invention;

[0040] Figure 4 Schematic diagram of the printhead printing mechanism provided by the present invention Figure 1 ;

[0041] Figure 5 Schematic diagram of the printhead printing mechanism provided by the present invention Figure 2 ;

[0042] Figure 6 Schematic diagram of the laser sintering mechanism provided by the present invention Figure 1 ;

[0043] Figure 7 Schematic diagram of the laser sintering mechanism provided by the present invention Figure 2 ;

[0044] Figure 8 This is a top view of the machining table and concave guide rail provided by the present invention.

[0045] Figure 9 for Figure 8 Enlarged view of area A in the image;

[0046] Figure 10 Schematic diagram of the disassembled structure of the processing table provided by the present invention Figure 1 ;

[0047] Figure 11 for Figure 10 Enlarged view of area B in the image;

[0048] Figure 12 Schematic diagram of the disassembled structure of the processing table provided by the present invention Figure 2 .

[0049] In the diagram: 1. Processing box; 2. Cover plate; 3. Box door; 4. First cubic support frame; 5. Second cubic support frame; 6. Processing table assembly; 61. First crossbeam; 62. Second crossbeam; 63. First guide rod; 64. First sliding seat; 65. Concave guide rail frame; 66. Processing table surface; 67. Slider; 68. First electric push rod; 69. First lead screw motor; 610. First lead screw; 611. First lead screw nut seat; 7. Printhead printing mechanism; 71. Second guide rod; 72. Second sliding seat; 73. Third guide rod; 74. Printing base; 75. Main printhead; 76. Auxiliary printhead; 8. First drive mechanism; 81. First drive motor; 82. First belt; 83. First rotating shaft; 84. Second belt; 85. Second lead screw motor; 86. Second... 9. Lead screw; 91. Laser sintering mechanism; 92. Fourth guide rod; 93. Third sliding seat; 94. Fifth guide rod; 95. Sintering seat; 96. Substrate; 97. Laser; 98. Inclined mounting seat; 10. Galvanometer; 10. Second drive mechanism; 101. Second drive motor; 102. Second rotating shaft; 103. Third belt; 104. Fourth belt; 105. Third lead screw motor; 106. Third lead screw; 651. Connecting shaft; 652. Extension rail; 653. Sector seat; 654. Rectangular rack; 671. Circular seat; 672. Connecting block; 673. Annular groove; 674. Arc block; 675. Gear ring; 676. Strip seat; 677. Rotating shaft; 678. First gear disk; 679. Second gear disk; 6791. Torsion spring; 6792. Drive seat. Detailed Implementation

[0050] To make the technical means, creative features, objectives, and effects of this invention readily understandable, the invention is further described below with reference to specific illustrations. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0051] Example 1

[0052] Please see Figures 1-2 This invention provides a technical solution: a laser sintering forming machine, comprising:

[0053] The processing box 1 has a rotating cover 2 on its side. By flipping the cover 2, the opening on the side of the processing box 1 can be opened or closed. When processing is carried out through the processing box 1, the flipping cover 2 closes the opening on the side of the processing box 1, so that the entire processing box 1 is a closed structure, reducing the interference of the external environment on the printing and sintering of ceramic materials.

[0054] The first cubic support frame 4 is fixed inside the processing box 1 and is used to support the processing box 1.

[0055] The second cubic support frame 5 is fixed inside the processing box 1 and is located on one side of the first cubic support frame 4, and is also used to support the processing box 1.

[0056] The processing table assembly 6 has a processing table surface 66 movably disposed thereon. The processing table surface 66 can move back and forth within the first cubic support frame 4 and the second cubic support frame 5 to adjust its position.

[0057] The nozzle printing mechanism 7, which is located on top of the first cubic support frame 4, is used to print 3D products on the processing table 66.

[0058] The laser sintering mechanism 9, which is located on top of the second cubic support frame 5, is used to sinter the printed 3D products.

[0059] Specifically, this laser sintering molding machine has two cubic support frames, namely the first cubic support frame 4 and the second cubic support frame 5, set inside the processing box 1 to form a frame structure, resulting in a better quality microstructure. Then, the processing table assembly 6, the nozzle printing mechanism 7 and the laser sintering mechanism 9 are set inside the two cubic support frames, thereby improving the overall strength of the laser sintering molding machine, enhancing its vibration resistance, reducing vibration during use, and improving precision. Moreover, this structural design makes the overall structure of the laser sintering molding machine more compact.

[0060] Furthermore, this laser sintering molding machine integrates a nozzle printing mechanism 7 and a laser sintering mechanism 9. The nozzle printing mechanism 7 is located inside the top of the first cubic support frame 4, and the laser sintering mechanism 9 is located inside the top of the second cubic support frame 5. Then, the processing table 66 on the processing table assembly 6 can move back and forth within the first cubic support frame 4 and the second cubic support frame 5 to adjust its position, thereby realizing the integrated completion of printing and sintering. There is no need to transfer the printed model, reducing the transfer links and overcoming the problem of defective products and damage caused by transfer.

[0061] Example 2

[0062] Please see Figures 2-3 Based on the above embodiments, this embodiment further discloses the specific structure of the processing table assembly 6. The processing table assembly 6 includes two parallel first crossbeams 61 and second crossbeams 62. The first crossbeams 61 and second crossbeams 62 are both fixed in a rectangular frame on one side of the first cubic support frame 4. A first guide rod 63 perpendicular to the second crossbeam 62 is fixed between the first crossbeam 61 and the first cubic support frame 4. A first sliding seat 64 is slidably connected to the first guide rod 63.

[0063] A concave guide rail 65 is vertically welded to the first sliding seat 64, and one end of the concave guide rail 65 away from the first sliding seat 64 extends into the second cubic support frame 5. A slider 67 is movably connected to the lower surface of the processing table 66. The slider 67 is slidably connected to the concave guide rail 65. A first electric push rod 68 is fixed between the first sliding seat 64 and the slider 67. The first electric push rod 68 is controlled to extend and retract to drive the processing table 66 to move back and forth on the concave guide rail 65.

[0064] A first lead screw motor 69 is fixed on the second crossbeam 62. The output shaft of the first lead screw motor 69 is fixed to the first lead screw 610 through a coupling. A first lead screw nut seat 611 is installed on the first sliding seat 64, and the first lead screw nut seat 611 is threadedly connected to the first lead screw 610 to control the rotation of the first lead screw 610. The first lead screw nut seat 611 can drive the machining table 66 to adjust its height.

[0065] Specifically, in use, by controlling the extension and retraction of the first electric push rod 68, the slider 67 can be pushed to move back and forth on the set concave guide rail frame 65. Thus, the slider 67 drives the processing table 66 to adjust its lateral position, allowing the processing table 66 to move back and forth within the first cubic support frame 4 and the second cubic support frame 5. This facilitates its use with the print head printing mechanism 7 and the laser sintering mechanism 9 set within the first cubic support frame 4 and the second cubic support frame 5. Furthermore, in use, controlling the first lead screw motor 69 drives the first lead screw 610 to rotate. The forward and reverse rotation of the first lead screw 610 drives the first lead screw nut seat 611 to move up and down. The up and down movement of the first lead screw nut seat 611 drives the first sliding seat 64 to move up and down. The up and down movement of the first sliding seat 64 drives the processing table 66 on the concave guide rail frame 65 to move up and down, thereby achieving position adjustment.

[0066] Example 3

[0067] Please see Figure 2 and Figures 4-5 Based on the above embodiments, this embodiment further discloses a printhead printing mechanism 7. The printhead printing mechanism 7 includes two parallel second guide rods 71, which are fixed to the top of the inside of the first cubic support frame 4. Each of the two second guide rods 71 ​​is slidably provided with a second sliding seat 72. Two third guide rods 73 are fixedly connected between the two second sliding seats 72. A printhead 74 is slidably connected to the two third guide rods 73. A main printhead 75 is installed at the center of the lower surface of the printhead 74. Several auxiliary printheads 76 are installed around the lower surface of the printhead 74 outside the main printhead 75.

[0068] The setup of the main printhead 75 and several auxiliary printheads 76 can be used to process different types of materials and different colors of the same material, thereby improving printing efficiency, enabling multi-material, multi-color printing, or multi-functional printing.

[0069] The first cubic support frame 4 is also provided with a first drive mechanism 8, which is used to drive the print base 74 to perform horizontal and vertical position adjustments.

[0070] The first drive mechanism 8 includes a first drive motor 81 fixed on the first cubic support frame 4 and two parallel first rotating shafts 83. The two first rotating shafts 83 are rotatably connected to the inner top of the first cubic support frame 4. The two first rotating shafts 83 and the two second guide rods 71 ​​are perpendicular to each other and are offset from each other. The two first rotating shafts 83 are connected to each other by a second belt 84. The first drive motor 81 is connected to one of the first rotating shafts 83 by a first belt 82. It should be noted that the first belt 82 is connected to the first rotating shaft 83 and the first drive motor 81 by a pulley. The second belt 84 is connected and fixed to the second sliding seat 72. When the second belt 84 moves, it drives the second sliding seat 72 to move on the second guide rod 71.

[0071] The first drive mechanism 8 also includes a second lead screw motor 85, which is embedded and fixed on the second sliding seat 72. A second lead screw 86 is fixed to the output shaft of the second lead screw motor 85 through a coupling. The second lead screw 86 is threadedly connected to the print base 74. By rotating the second lead screw 86 in both directions, the print base 74 is driven to move back and forth on the third guide rod 73 to adjust its position.

[0072] Specifically, when the laser sintering molding machine prints ceramic materials on the processing table 66 through the nozzle printing mechanism 7, the printing base 74 can be automatically adjusted in the horizontal and vertical directions by the first drive mechanism 8. In use, the designed 3D model is imported into the control unit of the laser sintering molding machine, the printing parameters are set according to the structure and size of the model, and the first drive mechanism 8 and the nozzle printing mechanism 7 are controlled to work to print the ceramic model.

[0073] The specific method for adjusting the position of the printhead printing mechanism 7 by controlling the first drive mechanism 8 is as follows: the second lead screw motor 85 is controlled to work, and the second lead screw motor 85 drives the second lead screw 86 to rotate forward and backward. The forward and backward rotation of the second lead screw 86 drives the printhead 74 to move, thereby realizing the vertical position adjustment of the printhead 74; the first drive motor 81 is controlled to work, and the first drive motor 81 drives the first rotating shaft 83 to rotate through the first belt 82. The first rotating shaft 83 drives another first rotating shaft 83 to rotate through the second belt 84, thereby driving the second sliding seat 72 to move through the second belt 84. The movement of the second sliding seat 72 drives the printhead 74 to adjust its horizontal position.

[0074] Example 4

[0075] Please see Figure 2 and Figures 6-7 This embodiment further discloses a laser sintering mechanism 9 based on the above embodiment. The laser sintering mechanism 9 includes two parallel fourth guide rods 91. The two fourth guide rods 91 are fixed inside the top of the second cubic support frame 5. A third sliding seat 92 is slidably disposed on each of the two fourth guide rods 91, and a fifth guide rod 93 is fixed between the two third sliding seats 92. A sintering seat 94 is slidably installed on the fifth guide rod 93.

[0076] A substrate 95 is welded to the lower surface of the sintering base 94, and a laser 96 is mounted on the substrate 95. An inclined mounting base 97 is bolted to one end of the sintering base 94 along the length direction, and a galvanometer 98 for use with the laser 96 is mounted on the inclined mounting base 97.

[0077] The second cubic support frame 5 is also provided with a second drive mechanism 10, which is used to drive the sintering seat 94 to perform lateral and longitudinal position adjustments.

[0078] The second drive mechanism 10 includes a second drive motor 101 and two parallel second rotating shafts 102. The two parallel second rotating shafts 102 are rotatably connected to the top of the interior of the second cubic support frame 5. The output shaft of the second drive motor 101 is connected to one of the second rotating shafts 102 via a third belt 103. The two second rotating shafts 102 are connected via a fourth belt 104, and the fourth belt 104 is fixedly connected to the third sliding seat 92. The movement of the fourth belt 104 can drive the third sliding seat 92 to move on the fourth guide rod 91 for position adjustment.

[0079] The second drive mechanism 10 also includes a third lead screw motor 105, which is embedded in one of the third sliding seats 92. A third lead screw 106 is fixedly connected to the output shaft of the third lead screw motor 105. The third lead screw 106 is threadedly connected to the sintering seat 94. Driving the third lead screw 106 to rotate forward and backward can drive the sintering seat 94 to move back and forth on the fifth guide rod 93 for position adjustment.

[0080] Specifically, in this laser sintering molding machine, after the ceramic model is printed, the control processing table 66 moves into the second cubic support frame 5, and the laser sintering mechanism 9 sinters the printed ceramic product. This is the process of transforming ceramic powder into a solid ceramic product.

[0081] The second drive mechanism 10 controls the sintering seat 94 to adjust its position in the following ways: controlling the third lead screw motor 105 to work, driving the third lead screw 106 to rotate forward and backward, which can drive the sintering seat 94 to move back and forth on the fifth guide rod 93 to adjust its longitudinal position; controlling the second drive motor 101 to work, driving the third belt 103 to move, the third belt 103 drives the fourth belt 104 to move through the second rotating shaft 102, the fourth belt 104 can drive the third sliding seat 92 to move, and the movement of the third sliding seat 92 can adjust the sintering seat 94 to adjust its lateral position.

[0082] Example 5

[0083] The technical problem to be solved in this embodiment is that the processing box 1 is provided with a processing table 66. After the additive manufacturing process on the processing table 66 is completed, due to the limited internal space and narrow working area of ​​the processing box 1, it is inconvenient for the operator to take out the finished part.

[0084] Please see Figures 8-12 This implementation adds the following to the above embodiments:

[0085] The processing table 66 has an additive manufacturing state and an additive unloading state. In the additive manufacturing state, the processing table 66 is perpendicular to the first crossbeam 61. In the additive unloading state, the processing table 66 is horizontal to the first crossbeam 61. When the processing table 66 is moved out of the processing box 1, the linkage mechanism simultaneously drives the processing table 66 to switch from the additive manufacturing state to the additive unloading state.

[0086] The two vertical sections of the concave guide rail frame 65 are rotatably connected to an extension rail 652 via a connecting shaft 651. A sector seat 653 is fixed to the lower surface of the extension rail 652, and a rectangular rack 654 is welded and fixed to the sector seat 653.

[0087] It should be noted that there are two extension rails 652. In the initial state, the two extension rails 652 are perpendicular to the two vertical sections of the concave guide rail frame 65. When the extension rails 652 are needed, they can be driven to rotate and be on the same horizontal line as the concave guide rail frame 65, and then connected end to end.

[0088] There are four sliders 67 in total, and a circular seat 671 is set at the center of the four sliders 67. The outer wall of the circular seat 671 is fixedly connected to the slider 67 through the connecting block 672. An annular groove 673 is opened on the upper surface of the circular seat 671. An arc block 674 is welded to the lower surface of the processing table 66. The arc block 674 is slidably connected to the annular groove 673. A toothed ring 675 is welded to the back of the processing table 66 outside the arc block 674.

[0089] The linkage mechanism includes a strip seat 676, a strip seat 676 welded between two parallel connecting blocks 672, a rotating shaft 677 rotatably connected to the strip seat 676, a first gear disk 678 welded to one end of the rotating shaft 677 and meshing with a gear ring 675, and a second gear disk 679 welded to the other end of the rotating shaft 677.

[0090] A torsion spring 6791 is sleeved on the rotating shaft 677 between the first gear disk 678 and the strip seat 676. The bottom end of the torsion spring 6791 is fixed on the first gear disk 678, and the top end of the torsion spring 6791 is fixed on the strip seat 676.

[0091] It should be noted that, in the initial state, under the elastic force of the torsion spring 6791, the first gear disk 678 is assisted in limiting and fixing, and the first gear disk 678 uses the gear ring 675 to assisted in limiting and fixing the processing table surface 66.

[0092] A drive seat 6792 is fixed on the concave guide rail frame 65. The drive seat 6792 has an L-shaped structure and a servo motor is fixed on the drive seat 6792. The output shaft of the servo motor is fixedly connected to the connecting shaft 651 and is used to drive the connecting shaft 651 to rotate.

[0093] Specifically, in this embodiment, when the additive manufacturing on the processing table 66 is completed, when it is necessary to unload the material, the box door 3 is flipped open, and the extension rail 652, which is perpendicular to the two vertical sections of the concave guide rail frame 65, is controlled to rotate so that it is on the same horizontal line as the concave guide rail frame 65 and connected end to end, so that the extension rail 652 extends to the outside of the box door 3.

[0094] Furthermore, when the extension rail 652 rotates to be on the same horizontal line as the concave guide rail frame 65, it synchronously drives the sector seat 653 to rotate, so that the rectangular rack 654 fixed on the sector seat 653 rotates to be parallel to the vertical section of the concave guide rail frame 65.

[0095] At this time, by controlling the extension and retraction of the first electric push rod 68, the slider 67 can be pushed to move on the set concave guide rail 65, thereby driving the processing table 66 to move towards the door 3. As the slider 67 moves, it drives the second gear disk 679 to move and mesh with the rectangular rack 654. As the slider 67 continues to move, it synchronously drives the second gear disk 679 to move on the rectangular rack 654, thereby driving the second gear disk 679 to rotate. The second gear disk 679 drives the first gear disk 678 to rotate. The first gear disk 678 drives the processing table 66 to rotate through the gear ring 675, driving the processing table 66 to switch from the additive manufacturing state to the additive output state.

[0096] In this embodiment, when the door 3 is opened, the drive extension rail 652 can quickly rotate and unfold to horizontally connect with the concave guide rail frame 65, forming a continuous track extending to the outside of the processing box 1. This provides a smooth path for the processing table 66 to be moved out, overcoming the problem of limited space inside the processing box 1 and inconvenience for operators to remove finished parts. Furthermore, while the extension rail 652 unfolds, its linkage mechanism synchronously drives the rectangular rack 654 on the sector seat 653 to rotate to the vertical working position. When the control slider 67 moves along the guide rail towards the door 3, it drives the second gear disk 679 to mesh with the vertical rectangular rack 654. The linear driving force of the slider 67 is used to efficiently convert linear motion into rotary motion through the meshing transmission of the second gear disk 679 and the rectangular rack 654. Finally, the first gear disk 678 and the gear ring 675 drive the processing table 66 to reliably flip at a predetermined angle (such as 90 degrees), realizing the automatic switching from additive manufacturing state to unloading state. The whole process is smooth and requires no additional power source or complex operation. It not only simplifies the unloading steps and reduces the operation intensity, but also optimizes space utilization through compact linkage design, effectively improving the overall unloading efficiency and automation reliability of the equipment.

[0097] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A laser sintering forming machine, characterized in that, include: The processing box (1) has a detachable cover plate (2) on its side and a door (3) that can be rotated and opened at one end along the length direction. The first cubic support frame (4) is fixed inside the processing box (1) and is used to support the processing box (1); The second cubic support frame (5) is fixed inside the processing box (1) and located on one side of the first cubic support frame (4), and is also used to support the processing box (1). The processing table assembly (6) has a processing table surface (66) movably disposed thereon. The processing table surface (66) can move back and forth within the first cubic support frame (4) and the second cubic support frame (5) to adjust its position. The processing table assembly (6) includes two parallel first crossbeams (61) and second crossbeams (62). The first crossbeams (61) and second crossbeams (62) are both fixed in a rectangular frame on one side of the first cubic support frame (4). A first guide rod (63) perpendicular to the second crossbeam (62) is fixed between the first crossbeams (61) and the first cubic support frame (4). A first sliding seat (64) is slidably connected to the first guide rod (63). A concave guide rail frame (65) is vertically welded on the first sliding seat (64), and one end of the concave guide rail frame (65) away from the first sliding seat (64) extends into the interior of the second cubic support frame (5). A slider (67) is movably connected to the lower surface of the processing table (66), and the slider (67) is slidably connected to the concave guide rail frame (65). The processing table (66) has an additive manufacturing state and an additive output state. In the additive manufacturing state, the processing table (66) is perpendicular to the first crossbeam (61). In the additive output state, the processing table (66) is horizontal to the first crossbeam (61). When the processing table (66) is moved outside the processing box (1), the linkage mechanism synchronously drives the processing table (66) to switch from the additive manufacturing state to the additive output state. There are four sliders (67), and a circular seat (671) is provided at the center of each slider (67). The outer wall of the circular seat (671) is fixedly connected to the slider (67) through a connecting block (672). An annular groove (673) is provided on the upper surface of the circular seat (671). An arc-shaped block (674) is welded to the lower surface of the processing table (66). The arc-shaped block (674) is slidably connected to the annular groove (673). A toothed ring (675) is welded to the back of the processing table (66) outside the arc-shaped block (674). The linkage mechanism includes a strip seat (676), which is welded between two parallel connecting blocks (672). A rotating shaft (677) is rotatably connected to the strip seat (676). A first gear disk (678) is welded to one end of the rotating shaft (677), and the first gear disk (678) meshes with a gear ring (675). A second gear disk (679) is welded to the other end of the rotating shaft (677). A torsion spring (6791) is sleeved on the rotating shaft (677) between the first gear disk (678) and the strip seat (676). The bottom end of the torsion spring (6791) is fixed on the first gear disk (678), and the top end of the torsion spring (6791) is fixed on the strip seat (676). The two vertical sections of the concave guide rail frame (65) are rotatably connected to an extension rail (652) via a connecting shaft (651). A sector seat (653) is fixed on the lower surface of the extension rail (652), and a rectangular rack (654) is welded and fixed on the sector seat (653). A drive seat (6792) is fixed on the concave guide rail frame (65). The drive seat (6792) has an L-shaped structure. A servo motor is fixed on the drive seat (6792). The output shaft of the servo motor is fixedly connected to the connecting shaft (651) and is used to drive the connecting shaft (651) to rotate.

2. The laser sintering forming machine according to claim 1, characterized in that, Also includes: The nozzle printing mechanism (7), which is set on top of the first cubic support frame (4), is used to print 3D products on the processing table (66); A laser sintering mechanism (9) is located on top of the second cubic support frame (5) and is used to sinter the printed 3D products.

3. The laser sintering forming machine according to claim 1, characterized in that, A first electric push rod (68) is fixed between the first sliding seat (64) and the slider (67). The first electric push rod (68) is controlled to extend and retract, thereby driving the processing table (66) to move back and forth on the concave guide rail frame (65). The second crossbeam (62) is fixed with a first lead screw motor (69). The output shaft of the first lead screw motor (69) is fixed with a first lead screw (610) through a coupling. The first sliding seat (64) is equipped with a first lead screw nut seat (611), and the first lead screw nut seat (611) is threadedly connected to the first lead screw (610) to control the rotation of the first lead screw (610). The first lead screw nut seat (611) can drive the machining table (66) to adjust its height.

4. A laser sintering forming machine according to claim 2, characterized in that, The printhead printing mechanism (7) includes two parallel second guide rods (71), which are fixed to the top of the inside of the first cubic support frame (4). Each of the two second guide rods (71) is slidably provided with a second sliding seat (72). Two third guide rods (73) are fixed between the two second sliding seats (72). A printhead (74) is slidably connected to the two third guide rods (73). A main printhead (75) is installed at the center of the lower surface of the printhead (74). Several auxiliary printheads (76) are installed around the lower surface of the printhead (74) on the outer periphery of the main printhead (75).

5. A laser sintering forming machine according to claim 4, characterized in that, The first cubic support frame (4) is also provided with a first drive mechanism (8), which is used to drive the printing base (74) to perform horizontal and vertical position adjustments.

6. A laser sintering forming machine according to claim 5, characterized in that, The first drive mechanism (8) includes a first drive motor (81) fixed on the first cubic support frame (4) and two parallel first rotating shafts (83). The two first rotating shafts (83) are rotatably connected to the top of the inside of the first cubic support frame (4). The two first rotating shafts (83) and the two second guide rods (71) are perpendicular to each other and are misaligned with each other. The two first rotating shafts (83) are connected to each other by a second belt (84). The first drive motor (81) is connected to one of the first rotating shafts (83) by a first belt (82). The second belt (84) is connected and fixed to the second sliding seat (72). When the second belt (84) moves, it drives the second sliding seat (72) to move on the second guide rod (71). The first drive mechanism (8) also includes a second lead screw motor (85), which is embedded and fixed on the second sliding seat (72). A second lead screw (86) is fixed to the output shaft of the second lead screw motor (85) through a coupling. The second lead screw (86) is threadedly connected to the print base (74). By rotating the second lead screw (86) in both directions, the print base (74) is driven to move back and forth on the third guide rod (73) to adjust its position.

7. A laser sintering forming machine according to claim 2, characterized in that, The laser sintering mechanism (9) includes two parallel fourth guide rods (91), which are fixed to the top of the second cubic support frame (5). Each of the two fourth guide rods (91) is slidably provided with a third sliding seat (92), and a fifth guide rod (93) is fixed between the two third sliding seats (92). A sintering seat (94) is slidably installed on the fifth guide rod (93).

8. A laser sintering forming machine according to claim 7, characterized in that, A substrate (95) is welded to the lower surface of the sintering base (94), and a laser (96) is mounted on the substrate (95). An inclined mounting base (97) is bolted to one end of the sintering base (94) along the length direction, and a galvanometer (98) for use with the laser (96) is mounted on the inclined mounting base (97). The second cubic support frame (5) is also provided with a second drive mechanism (10), which is used to drive the sintering seat (94) to perform lateral and longitudinal position adjustments; The second drive mechanism (10) includes a second drive motor (101) and two parallel second rotating shafts (102). The two parallel second rotating shafts (102) are rotatably connected to the top of the interior of the second cubic support frame (5). The output shaft of the second drive motor (101) is connected to one of the second rotating shafts (102) via a third belt (103). The two second rotating shafts (102) are connected via a fourth belt (104). The fourth belt (104) is fixedly connected to the third sliding seat (92). The third sliding seat (92) moves on the fourth guide rod (91) by moving the fourth belt (104) to adjust its position. The second drive mechanism (10) also includes a third lead screw motor (105), which is embedded in one of the third sliding seats (92). A third lead screw (106) is fixed on the output shaft of the third lead screw motor (105). The third lead screw (106) is threadedly connected to the sintering seat (94). Driving the third lead screw (106) to rotate forward and backward can drive the sintering seat (94) to move back and forth on the fifth guide rod (93) for position adjustment.

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