Continuous powder feeding induction type heating metal additive manufacturing device

Abstract

The invention relates to the technical field of powder additive manufacturing equipment, in particular to a continuous powder feeding induction type heating metal additive manufacturing device. Comprising a base, and a mounting plate is arranged at the top of the base; a lifting seat is arranged on the mounting plate in the vertical direction; and one side wall of the lifting seat is in transmission connection with a preheating printing mechanism. The rotating shaft is controlled to drive the spiral pushing blade to push metal powder, when the metal powder passes through the induction coil, based on the principles of electromagnetic induction and the eddy current effect, and the area, where the induction coil is heated fastest, is usually located on the inner surface close to the coil, so that the metal powder can be quickly melted, and the melting efficiency is improved. And the metal powder cannot generate splashing pollution, the metal powder and the metal slag in the heating cavity can be recycled through the corresponding set of material returning openings by controlling the spiral pushing blades to rotate forwards and backwards, and the raw material recycling effect is improved while the using effect of the additive manufacturing equipment is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of powder material additive manufacturing equipment, and in particular relates to a continuous powder feeding induction heating metal additive manufacturing device. Background Art

[0002] Additive manufacturing technology (i.e. 3D printing technology) is a hot spot in current technological applications. Since 3D printing is an incremental manufacturing process, it can greatly reduce the waste of raw materials, especially rare materials. 3D printing can also directly print and manufacture features and products that cannot be manufactured by general de-mass processing, such as closed cavities, curved cavities, etc.

[0003] After searching, in the prior art, China Announcement No.: CN209698041U, Announcement Date: 2019-11-29, discloses a metal powder additive manufacturing device, including a frame printing device and a CNC processing device; the printing device includes a material spreading mechanism provided on the frame and used to spread the powder, a feeding mechanism provided on the frame and used to feed the material spreading mechanism, and a laser printing head provided on the frame and used to print and shape the powder on the material spreading mechanism; the CNC processing device includes a moving mechanism and a processing head, the moving mechanism includes a transverse moving component, a longitudinal moving component and a vertical moving component, the transverse moving component is installed on the material spreading mechanism in a transverse direction, the longitudinal moving component is installed on the driving end of the transverse moving component in a longitudinal direction and slides in a transverse direction, the vertical moving component is installed on the driving end of the longitudinal moving component in a vertical direction and slides in a longitudinal direction, and the processing head is installed on the driving end of the vertical moving component and slides in a vertical direction. When the device is printing, the processing head can move to a specified position to perform secondary processing on the object, thereby improving the accuracy and yield rate of the printed object.

[0004] However, the device still has the following defects:

[0005] Existing additive manufacturing equipment usually melts metal powder through laser or electron beam, but the energy of laser or electron beam is relatively concentrated, which not only has low melting efficiency, but also causes splashing pollution of metal powder, thereby reducing the use effect of additive manufacturing equipment. Summary of the invention

[0006] In view of the above problems, the present invention provides a continuous powder feeding induction heating metal additive manufacturing device, comprising a base, a supporting mechanism is provided above the base; a mounting plate is provided on the top of the base; a lifting seat is provided in a vertical direction on the mounting plate; a preheating printing mechanism is transmission-connected to a side wall of the lifting seat; a continuous feeding mechanism is provided on the top of one end of the preheating printing mechanism;

[0007] The preheating printing mechanism comprises a box body; a print head is arranged at the bottom of the box body; a preheating tube is penetrated through one side wall of the box body; a heating chamber is arranged in the preheating tube; a rotating shaft is arranged in the heating chamber; a spiral pushing blade for pushing powder and recycling is arranged on the outer wall of the rotating shaft;

[0008] An induction coil for rapid heating is provided on the inner wall of the heating chamber; a group of return plates for recovering metal powder and slag are respectively provided at both ends of the preheating tube; a group of return ports are respectively opened at both ends of the heating chamber; both ends of the rotating shaft respectively penetrate into a corresponding group of return plates, and a group of baffles for movably blocking the return ports are provided on the outer wall.

[0009] Furthermore, two groups of support blocks are symmetrically provided at the two side edges of the top of the base; two groups of guide rods are symmetrically provided between the two groups of support blocks; a first screw rod is provided between the two groups of support blocks; the two ends of the first screw rod are respectively rotatably connected to the corresponding group of support blocks; the support mechanism is movably sleeved on the outer walls of the two groups of guide rods, and is threadedly connected to the first screw rod.

[0010] Furthermore, the mounting plate is U-shaped; a second screw is provided between the mounting plate and the base; the second screw is threadedly connected to the lifting seat; a mounting block is slidably connected to a side wall of the lifting seat close to the preheating printing mechanism; the preheating printing mechanism is installed on a side wall of the mounting block; a third screw is provided in the lifting seat; the third screw is threadedly connected to the mounting block.

[0011] Furthermore, the support mechanism includes a guide block and a first support plate; the guide block is movably sleeved on the outer walls of the two groups of guide rods; the guide block is threadedly connected to the first screw rod; two groups of second support plates are cross-arranged on the top of the guide block; a group of third support plates is arranged at both ends of each group of the second support plates; the four groups of the third support plates are located on the same horizontal plane.

[0012] Furthermore, a group of electric push rods are provided at the bottom of each group of the third support plates; a group of universal balls are hinged at the bottom corners of the first support plates; the output ends of each group of the electric push rods are transmission connected to the corresponding group of universal balls; and a gyroscope is provided at the bottom center of the first support plate.

[0013] Furthermore, a cooling pipe is provided at the bottom of the box body; a feed port is provided at the top of one end of the preheating tube; the feed port is connected to the output end of the continuous feeding mechanism; a discharge port is opened at the bottom of the heating chamber; and a sealing plate is provided in the discharge port.

[0014] Furthermore, a material guide pipe is provided in the box body; the two ends of the material guide pipe are respectively connected to the feed port and the print head; an insulation pipe is sleeved on the outer wall of the material guide pipe; an insulation channel is spirally provided in the insulation pipe; an induced draft fan is provided on the bottom inner wall of the box body; the two ends of the induced draft fan are respectively connected to the cooling pipe and one end of the insulation channel; the other end of the insulation channel is connected to the top of the heating chamber.

[0015] Furthermore, a group of first magnets is provided on the side wall of each group of baffles close to the preheating tube; a group of second magnets is provided on the inner wall of each group of return plates close to the preheating tube; and each group of the second magnets is magnetically connected to the corresponding group of first magnets.

[0016] Furthermore, the continuous feeding mechanism includes a powder storage box; a top cover is provided on the top of the powder storage box; a feeding port is provided on one side wall of the powder storage box; a discharge valve is provided at the bottom of the powder storage box; a powder storage cavity is provided in the powder storage box; the inner diameter of the powder storage cavity decreases from top to bottom; and a feeding cavity is provided below the powder storage cavity.

[0017] Furthermore, a rotating column is provided in the powder storage chamber; a plurality of groups of shearing pieces are evenly distributed on the outer wall of the rotating column; a feeding trough is provided at the bottom of the rotating column; the feeding trough is connected with the feeding chamber; a plurality of groups of filter holes are evenly and respectively provided on the inner wall of the feeding trough; and each group of filter holes is inclined in the horizontal direction.

[0018] The beneficial effects of the present invention are:

[0019] 1. The metal powder is pushed by controlling the rotating shaft to drive the spiral push blade. When the metal powder passes through the induction coil, based on the principles of electromagnetic induction and eddy current effect, the fastest heating area of ​​the induction coil is usually located near the inner surface of the coil, so that the metal powder can be melted quickly without splashing pollution. In addition, by controlling the forward and reverse rotation of the spiral push blade, the metal powder and metal slag inside the heating chamber can be recovered through a corresponding set of return ports, which improves the use effect of the additive manufacturing equipment while improving the raw material recovery effect.

[0020] 2. During the printing process, the induced draft fan is started, and the hot air in the heating chamber enters through one end of the insulation channel. When passing through the spiral insulation channel, the material guide tube can always maintain a high temperature to prevent the molten droplets from condensing. Then the air with a lower temperature is discharged through the cooling pipe, which increases the air pressure on one side of the printing area, increases the air circulation speed, and enables the printed body to cool faster, thereby improving the heat utilization efficiency of the additive manufacturing equipment and the cooling speed of the printed body.

[0021] 3. By controlling the rotating column to drive several groups of shearing pieces to rotate, when the metal powder enters the powder storage chamber through the feeding port, several groups of shearing pieces will crush the agglomerated metal powder during high-speed rotation, and then the metal powder falls to the bottom of the powder storage chamber. At the same time, since several groups of filter holes are inclined, the filtering work can be completed quickly when the rotating column rotates, avoiding large-volume foreign matter from entering the subsequent processing flow, thereby improving the feeding effect of the additive manufacturing equipment.

[0022] 4. The horizontal state of the first support plate is monitored in real time by a gyroscope. When it is detected that the first support plate has an angular offset relative to the preheating printing mechanism, the angle of the first support plate is adjusted by controlling the extension and retraction of four groups of electric push rods respectively, so that the first support plate always maintains a horizontal state with the preheating printing mechanism, thereby avoiding the problem of distortion of the shape of the printed body caused by the offset of the structure used to support the printed body relative to the printing structure after long-term use of the existing additive manufacturing equipment, thereby improving the use effect of the additive manufacturing equipment.

[0023] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic structural diagram of a manufacturing device according to an embodiment of the present invention is shown;

[0026] Figure 2 An exploded schematic diagram of a manufacturing device according to an embodiment of the present invention is shown;

[0027] Figure 3 shows an exploded schematic diagram of a support mechanism according to an embodiment of the present invention;

[0028] Figure 4 A bottom view structural schematic diagram of a support mechanism according to an embodiment of the present invention is shown;

[0029] Figure 5 A schematic structural diagram of a preheating printing mechanism according to an embodiment of the present invention is shown;

[0030] Figure 6A cross-sectional schematic diagram of a preheating printing mechanism according to an embodiment of the present invention is shown;

[0031] Figure 7 The embodiment of the present invention is shown Figure 6 An enlarged schematic diagram of point A;

[0032] Figure 8 It shows a structural schematic diagram of a continuous feeding mechanism according to an embodiment of the present invention;

[0033] Fig. 9 A cross-sectional schematic diagram of a continuous feeding mechanism according to an embodiment of the present invention is shown.

[0034] In the figure: 1, base; 2, support block; 3, guide rod; 4, first screw rod; 5, support mechanism; 6, mounting plate; 7, lifting seat; 8, preheating printing mechanism; 9, continuous feeding mechanism; 10, second screw rod; 11, third screw rod; 12, mounting block; 501, guide block; 502, first support plate; 503, connecting plate; 503, second support plate; 504, third support plate; 505, electric push rod; 506, universal ball; 507, gyroscope; 801, box body; 802, print head; 803, cooling pipe; 804, preheating pipe; 805, feed port; 806, return plate; 807, heating chamber; 808, rotating shaft; 809, spiral push blade; 810, induction coil; 811, sealing plate; 812, guide pipe; 813, insulation pipe; 814, insulation channel; 815, induced draft fan; 816, baffle; 817, first magnet; 818, second magnet; 819, return port; 901, powder storage box; 902, top cover; 903, feeding port; 904, unloading valve; 905, powder storage chamber; 906, feeding chamber; 907, rotating column; 908, shearing piece; 909, feeding trough; 910, filter hole. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The embodiment of the present invention provides a continuous powder feeding induction heating metal additive manufacturing device, including a base 1. For example, Figure 1 and Figure 2As shown, two groups of support blocks 2 are symmetrically arranged at the two side edges of the top of the base 1; two groups of guide rods 3 are symmetrically arranged between the two groups of support blocks 2; a first screw rod 4 is arranged between the two groups of support blocks 2; the two ends of the first screw rod 4 are rotatably connected to the corresponding group of support blocks 2; a support mechanism 5 is arranged above the base 1; the support mechanism 5 is movably sleeved on the outer walls of the two groups of guide rods 3 and is threadedly connected to the first screw rod 4; a mounting plate 6 is arranged on the top of the base 1; the mounting plate 6 is U-shaped; a vertical direction is provided on the mounting plate 6 There is a lifting seat 7; a preheating printing mechanism 8 is transmission-connected on one side wall of the lifting seat 7; a continuous feeding mechanism 9 is provided on the top of one end of the preheating printing mechanism 8; a second screw rod 10 is provided between the mounting plate 6 and the base 1; the second screw rod 10 is threadedly connected to the lifting seat 7; a mounting block 12 is slidably connected on a side wall of the lifting seat 7 close to the preheating printing mechanism 8; the preheating printing mechanism 8 is installed on a side wall of the mounting block 12; a third screw rod 11 is provided in the lifting seat 7; the third screw rod 11 is threadedly connected to the mounting block 12.

[0037] When performing metal additive manufacturing, first add the metal powder into the continuous feeding mechanism 9, and then the continuous feeding mechanism 9 transports the metal powder to the preheating printing mechanism 8, which melts the metal powder and performs printing. During the printing process, by controlling the rotation of the first screw rod 4, under the threaded connection relationship between the first screw rod 4 and the support mechanism 5 and the guiding action of the two sets of guide rods 3, the support mechanism 5 can move horizontally on the X-axis, and by controlling the rotation of the third screw rod 11, under the threaded connection relationship between the third screw rod 11 and the mounting block 12, the mounting block 12 can drive the preheating printing mechanism 8 to move horizontally on the Y-axis. By controlling the rotation of the second screw rod 10, under the threaded connection relationship between the second screw rod 10 and the lifting seat 7, the lifting seat 7 can drive the preheating printing mechanism 8 to move vertically on the Z-axis through the mounting block 12. With the cooperation of the above-mentioned driving work, the manufacturing device can complete the 3D printing metal additive manufacturing work.

[0038] For example, Figure 3 and Figure 4As shown, the support mechanism 5 includes a guide block 501 and a first support plate 502; the guide block 501 is movably sleeved on the outer walls of the two groups of guide rods 3; the guide block 501 is threadedly connected to the first screw rod 4; two groups of second support plates 503 are cross-arranged on the top of the guide block 501; a group of third support plates 504 are arranged at both ends of each group of the second support plates 503; the four groups of the third support plates 504 are located on the same horizontal plane; a group of electric push rods 505 are arranged at the bottom of each group of the third support plates 504; a group of universal balls 506 are respectively hinged at the bottom corners of the first support plate 502; the output end of each group of the electric push rods 505 is transmission-connected to the corresponding group of universal balls 506; a gyroscope 507 is arranged at the bottom center of the first support plate 502.

[0039] The horizontal state of the first support plate 502 is monitored in real time by the gyroscope 507. When it is detected that the first support plate 502 is angularly offset relative to the preheating printing mechanism 8, the angle of the first support plate 502 is adjusted by controlling the extension and retraction of the four groups of electric push rods 505 respectively, so that the first support plate 502 always maintains a horizontal state with the preheating printing mechanism 8, thereby avoiding the problem of distortion of the shape of the printed body caused by the offset of the structure used to support the printed body relative to the printing structure after long-term use of the existing additive manufacturing equipment, thereby improving the use effect of the additive manufacturing equipment.

[0040] For example, Figure 5 , Figure 6 and Figure 7As shown, the preheating printing mechanism 8 comprises a box body 801; a print head 802 is provided at the bottom of the box body 801; a cooling pipe 803 is provided at the bottom of the box body 801; a preheating pipe 804 is penetrated through one side wall of the box body 801; a feed port 805 is provided at the top of one end of the preheating pipe 804; the feed port 805 is connected to the output end of the continuous feeding mechanism 9; a group of return plates 806 are provided at both ends of the preheating pipe 804; a heating chamber 80 is provided in the preheating pipe 804 7; a rotating shaft 808 is provided in the heating chamber 807; a spiral push blade 809 is provided on the outer wall of the rotating shaft 808; an induction coil 810 is provided on the inner wall of the heating chamber 807; a feed opening is provided at the bottom of the heating chamber 807; a sealing plate 811 is provided in the feed opening; a material guide pipe 812 is provided in the box body 801; two ends of the material guide pipe 812 are respectively connected to the feed opening and the print head 802; an insulation pipe 813 is sleeved on the outer wall of the material guide pipe 812; The heat preservation pipe 813 is provided with a heat preservation channel 814 in a spiral shape; an induced draft fan 815 is provided on the inner wall of the bottom of the box body 801; the two ends of the induced draft fan 815 are respectively connected to the cooling pipe 803 and one end of the heat preservation channel 814; the other end of the heat preservation channel 814 is connected to the top of the heating chamber 807; the two ends of the rotating shaft 808 are respectively penetrated into a corresponding set of return plates 806, and a set of baffles 816 are provided on the outer wall; the two sets of baffles 816 can follow the rotating shaft 80 8 unidirectional rotation, and the rotation direction is opposite; each group of the baffles 816 is provided with a group of first magnets 817 on the side wall close to the preheating tube 804; each group of the return plates 806 is provided with a group of second magnets 818 on the inner wall of the side close to the preheating tube 804; each group of the second magnets 818 is magnetically connected to the corresponding group of first magnets 817; a group of return ports 819 are respectively opened at both ends of the heating chamber 807; each group of the baffles 816 can movably close the corresponding group of return ports 819.

[0041] When performing metal additive manufacturing, metal powder enters the heating chamber 807 from the continuous feeding mechanism 9, and then the rotating shaft 808 is controlled to drive the spiral pushing blade 809 to push the metal powder. When the metal powder passes through the induction coil 810, based on the principles of electromagnetic induction and eddy current effect, and the area where the induction coil 810 heats the fastest is usually located near the inner surface of the coil, the metal powder can be quickly melted, and then the metal melt is used for 3D printing. When the printing work is completed, the rotating shaft 808 can stop rotating immediately, and the induction coil 810 is immediately powered off to avoid excessive melting of the metal powder. After closing the sealing plate 811, the spiral pushing blade 809 is controlled to rotate in the opposite direction to recover the powder inside the heating chamber 807 through a corresponding set of return ports 819, and then the spiral pushing blade 809 is controlled to rotate forward to recover the metal slag from the return port 819 at the other end, thereby improving the recovery effect of the raw materials. The molten metal droplets enter the guide tube 812 through the discharge port and then enter the print head 802 for printing. During the printing process, the induced draft fan 815 is started, and the hot air in the heating chamber 807 enters through one end of the insulation channel 814. When passing through the spiral insulation channel 814, the guide tube 812 can always maintain a high temperature to prevent the molten droplets from condensing. Then, the air with reduced temperature is discharged through the cooling pipe 803, so that the air pressure on one side of the printing area increases, the air circulation speed is increased, and the printed body can be cooled faster, thereby improving the heat utilization efficiency of the additive manufacturing equipment and the cooling speed of the printed body.

[0042] For example, Figure 8 and Fig. 9 As shown, the continuous feeding mechanism 9 includes a powder storage box 901; a top cover 902 is provided on the top of the powder storage box 901; a feeding port 903 is provided on one side wall of the powder storage box 901; a discharge valve 904 is provided at the bottom of the powder storage box 901; a powder storage cavity 905 is provided in the powder storage box 901; the inner diameter of the powder storage cavity 905 decreases from top to bottom; a feeding cavity 906 is provided below the powder storage cavity 905; a rotating column 907 is provided in the powder storage cavity 905; a plurality of groups of shearing pieces 908 are evenly distributed on the outer wall of the rotating column 907; a feeding trough 909 is provided at the bottom of the rotating column 907; the feeding trough 909 is connected with the feeding cavity 906; a plurality of groups of filter holes 910 are evenly and respectively provided on the inner wall of the feeding trough 909; each group of filter holes 910 is inclined in the horizontal direction.

[0043] When performing metal additive manufacturing, the rotating column 907 is controlled to drive several groups of shearing pieces 908 to rotate. When the metal powder enters the powder storage chamber 905 through the feeding port 903, several groups of shearing pieces 908 will break up the agglomerated metal powder during high-speed rotation, and then the metal powder falls into the bottom of the powder storage chamber 905. At the same time, since several groups of filter holes 910 are inclined, when the rotating column 907 rotates, the filtering work can be completed quickly to prevent large-volume foreign matter from entering the subsequent processing flow, thereby improving the feeding effect of the additive manufacturing equipment.

[0044] The spiral push blade 809 is driven by controlling the rotating shaft 808 to push the metal powder. When the metal powder passes through the induction coil 810, based on the principles of electromagnetic induction and eddy current effect, and the fastest heating area of ​​the induction coil 810 is usually located near the inner surface of the coil, the metal powder can be quickly melted without splashing pollution. In addition, by controlling the forward and reverse rotation of the spiral push blade 809, the metal powder and metal slag inside the heating chamber 807 can be recovered through a corresponding set of return ports 819, respectively, thereby improving the use effect of the additive manufacturing equipment and the raw material recovery effect.

[0045] During the printing process, the induced draft fan 815 is started, and the hot air in the heating chamber 807 enters through one end of the insulation channel 814. When passing through the spiral insulation channel 814, the material guide tube 812 can always maintain a high temperature state to prevent condensation of molten droplets. Subsequently, the air with reduced temperature is discharged through the cooling pipe 803, so that the air pressure on one side of the printing area increases, the air circulation speed is increased, and the printed body can be cooled faster, thereby improving the heat utilization efficiency of the additive manufacturing equipment and the cooling speed of the printed body.

[0046] By controlling the rotating column 907 to drive the plurality of shearing pieces 908 to rotate, when the metal powder enters the powder storage chamber 905 through the feeding port 903, the plurality of shearing pieces 908 will break up the agglomerated metal powder during high-speed rotation, and then the metal powder falls into the bottom of the powder storage chamber 905. At the same time, since the plurality of filter holes 910 are inclined, the filtering work can be completed quickly when the rotating column 907 rotates, and large-volume foreign matter can be prevented from entering the subsequent processing flow, thereby improving the feeding effect of the additive manufacturing equipment.

[0047] The horizontal state of the first support plate 502 is monitored in real time by the gyroscope 507. When it is detected that the first support plate 502 is angularly offset relative to the preheating printing mechanism 8, the angle of the first support plate 502 is adjusted by controlling the extension and retraction of the four groups of electric push rods 505 respectively, so that the first support plate 502 always maintains a horizontal state with the preheating printing mechanism 8, thereby avoiding the problem of distortion of the shape of the printed body caused by the offset of the structure used to support the printed body relative to the printing structure after long-term use of the existing additive manufacturing equipment, thereby improving the use effect of the additive manufacturing equipment.

[0048] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A continuous powder feeding induction heating metal additive manufacturing device, comprising a base, characterized in that: A support mechanism is provided above the base; a mounting plate is provided on the top of the base; a lifting seat is provided on the mounting plate in a vertical direction; a preheating printing mechanism is transmission-connected to a side wall of the lifting seat; a continuous feeding mechanism is provided on the top of one end of the preheating printing mechanism; The preheating printing mechanism comprises a box body; a print head is arranged at the bottom of the box body; a preheating tube is penetrated through one side wall of the box body; a heating chamber is arranged in the preheating tube; a rotating shaft is arranged in the heating chamber; a spiral pushing blade for pushing powder and recycling is arranged on the outer wall of the rotating shaft; An induction coil for rapid heating is provided on the inner wall of the heating chamber; a group of return plates for recovering metal powder and slag are respectively provided at both ends of the preheating tube; a group of return ports are respectively opened at both ends of the heating chamber; both ends of the rotating shaft respectively penetrate into a corresponding group of return plates, and a group of baffles for movably blocking the return ports are provided on the outer wall.

2. The continuous powder feeding induction heating metal additive manufacturing device according to claim 1 is characterized in that: Two groups of support blocks are symmetrically arranged at the two side edges of the top of the base; two groups of guide rods are symmetrically arranged between the two groups of support blocks; a first screw rod is arranged between the two groups of support blocks; the two ends of the first screw rod are rotatably connected to the corresponding group of support blocks; the support mechanism is movably sleeved on the outer walls of the two groups of guide rods and is threadedly connected to the first screw rod.

3. The continuous powder feeding induction heating metal additive manufacturing device according to claim 2 is characterized in that: The mounting plate is U-shaped; a second screw is provided between the mounting plate and the base; the second screw is threadedly connected to the lifting seat; a mounting block is slidably connected to a side wall of the lifting seat close to the preheating printing mechanism; the preheating printing mechanism is installed on a side wall of the mounting block; a third screw is provided in the lifting seat; the third screw is threadedly connected to the mounting block.

4. The continuous powder feeding induction heating metal additive manufacturing device according to claim 1 is characterized in that: The support mechanism includes a guide block and a first support plate; the guide block is movably sleeved on the outer walls of two groups of guide rods; the guide block is threadedly connected to the first screw rod; two groups of second support plates are cross-arranged on the top of the guide block; a group of third support plates is arranged at both ends of each group of the second support plates; the four groups of the third support plates are located on the same horizontal plane.

5. The continuous powder feeding induction heating metal additive manufacturing device according to claim 4 is characterized in that: A group of electric push rods are provided at the bottom of each group of the third support plates; a group of universal balls are hinged at the bottom corners of the first support plates; the output end of each group of the electric push rods is transmission-connected to the corresponding group of universal balls; a gyroscope is provided at the bottom center of the first support plates.

6. The continuous powder feeding induction heating metal additive manufacturing device according to claim 1, characterized in that: A cooling pipe is provided at the bottom of the box body; a feed port is provided at the top of one end of the preheating tube; the feed port is connected to the output end of the continuous feeding mechanism; a discharge port is provided at the bottom of the heating chamber; a sealing plate is provided in the discharge port.

7. The continuous powder feeding induction heating metal additive manufacturing device according to claim 6, characterized in that: A material guide pipe is provided in the box body; the two ends of the material guide pipe are respectively connected to the feed port and the print head; an insulation pipe is sleeved on the outer wall of the material guide pipe; a insulation channel is spirally provided in the insulation pipe; an induced draft fan is provided on the bottom inner wall of the box body; the two ends of the induced draft fan are respectively connected to the cooling pipe and one end of the insulation channel; the other end of the insulation channel is connected to the top of the heating chamber.

8. The continuous powder feeding induction heating metal additive manufacturing device according to claim 7, characterized in that: A group of first magnets is provided on the side wall of each group of baffles close to the preheating tube; a group of second magnets is provided on the inner wall of each group of return plates close to the preheating tube; each group of the second magnets is magnetically connected to the corresponding group of first magnets.

9. The continuous powder feeding induction heating metal additive manufacturing device according to claim 1, characterized in that: The continuous feeding mechanism includes a powder storage box; a top cover is provided on the top of the powder storage box; a feeding port is provided on one side wall of the powder storage box; a discharge valve is provided at the bottom of the powder storage box; a powder storage cavity is provided in the powder storage box; the inner diameter of the powder storage cavity decreases from top to bottom; and a feeding cavity is provided below the powder storage cavity.

10. The continuous powder feeding induction heating metal additive manufacturing device according to claim 9, characterized in that: A rotating column is provided in the powder storage chamber; a plurality of shearing pieces are evenly distributed on the outer wall of the rotating column; a feeding trough is provided at the bottom of the rotating column; the feeding trough is connected with the feeding chamber; a plurality of filtering holes are evenly and respectively provided on the inner wall of the feeding trough; each group of filtering holes is inclined in the horizontal direction.

Images