A support structure based on additive manufacturing

Abstract

The present invention belongs to the technical field of additive manufacturing, and specifically relates to a support structure based on additive manufacturing, including a mounting seat, a support portion is arranged on the upper part of the mounting seat, and the support portion supports the metal powder entering the interior to prevent the metal powder from rubbing against the cylinder wall and forming a cavity during the downward movement of the metal powder; a storage portion is arranged on the outer edge of the support portion, and the storage portion can store the metal powder discharged by the support portion, and screen it so that the unused metal powder and the waste residue after melting can be screened and removed, which can improve the recycling rate of the metal powder, and also can prevent the metal residue from affecting the quality of the finished product when the metal powder is used next time. The invention supports the metal powder by moving the support portion with the metal powder, so as to prevent the metal powder from forming a cavity due to friction during the movement, and realizes the vertical control of the support portion and the screening of the metal powder by the swing inside the storage portion through the power of the driving portion, thereby improving the power utilization rate.

Description

Technical Field

[0001] The present invention belongs to the technical field of additive manufacturing, and in particular relates to a support structure based on additive manufacturing. Background Art

[0002] Additive manufacturing technology, also known as 3D printing technology, is an emerging manufacturing technology that uses digital models as the basis and stacks materials layer by layer to create physical objects. It embodies the close integration of information network technology with advanced material technology and digital manufacturing technology, and is an important part of the advanced manufacturing industry.

[0003] Additive manufacturing technology uses a layer-by-layer accumulation method to directly manufacture physical parts from 3D digital models. Compared with traditional material removal manufacturing technology such as turning, grinding, and milling, additive manufacturing is a "bottom-up" material accumulation manufacturing technology.

[0004] The existing laser additive manufacturing process uses the interaction between the high-energy laser beam generated by the laser and the metal powder layer, so that the metal powder is quickly heated to a temperature above the melting point under the action of the high-energy laser beam to melt and then quickly cools and solidifies as the heat source moves. This rapid heating and cooling forming process allows the material to be melted and formed according to specified requirements.

[0005] After the powder spreading device completes the powder spreading supply in the manufacturing chamber, during the scanning process of each layer of feature selection of the part, the laser beam quickly scans and fills its two-dimensional cross-section and corresponding auxiliary features according to the planned path. The scanned area quickly melts and solidifies to combine with the formed features or matrix, and this cycle is repeated and stacked layer by layer until the printing of the part is completed.

[0006] However, in the process of the metal powder moving to the next layer, the metal powder rubs against the outer wall of the supporting container and sinks. As the volume of the metal powder becomes thicker, the friction with the outer wall increases. At the same time, the metal powder is also affected by the moisture in the air and its fluidity becomes worse. Therefore, the friction of the metal powder moving becomes greater in the thicker the metal powder is, and it is very easy to form cavities or large gaps in the metal powder, causing the upper metal powder layer to form bulges or depressions, resulting in uneven spreading of the subsequent metal powder, which in turn causes the precision of the finished product to decrease. Summary of the invention

[0007] The purpose of the present invention is to provide a support structure based on additive manufacturing, which can support the metal powder by moving with the support part to avoid the formation of cavities due to friction during the movement of the metal powder, and realize vertical control of the support part and screening of the metal powder by swinging inside the storage part through the power of the driving part, thereby improving power utilization.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A support structure based on additive manufacturing, comprising a mounting seat, wherein a support portion is arranged on the upper portion of the mounting seat, and the support portion supports the metal powder entering the interior to move and prevent the metal powder from rubbing against the cylinder wall and forming a cavity during the downward movement of the metal powder;

[0010] The outer edge of the support portion is provided with a receiving portion, and the receiving portion can receive the metal powder discharged from the support portion, and screen the unused metal powder and the waste residue after melting, thereby improving the recycling rate of the metal powder and preventing the metal residue from affecting the quality of the finished product when the metal powder is used next time;

[0011] The lower ends of the support part and the storage part are connected to a driving part, and the driving part can drive the interior of the support part to move in a vertical direction. At the same time, the power of the driving part can also drive the storage part to shake and screen, thereby improving the utilization efficiency of the power of the driving part;

[0012] The supporting part includes a guide cylinder, a limiting plate, a pallet, a limiting belt, and a lifting screw. The lower end of the guide cylinder is fixedly connected to the upper part of the mounting seat. Four limiting plates are provided, and the four limiting plates are fixedly connected to the inside of the guide cylinder. The sliding arrangement of the pallet is inside the guide cylinder. Four limiting belts are provided, and the ends of the four limiting belts are fixedly connected to the outer edge of the pallet. The inner side of the limiting belt is slidably connected to the outer edge of the limiting plate. The upper end of the lifting screw is fixedly connected to the lower end of the pallet.

[0013] In a preferred solution, a guide frame is provided at the upper end of the limiting plate, and a protruding portion of the guide frame cooperates with the interior of the receiving portion.

[0014] In a preferred solution, a limiting wheel is rotatably arranged inside the guide frame, and the outer edge of the limiting wheel contacts the inner side of the limiting belt.

[0015] In a preferred embodiment, the entirety of the limiting belt is a flexible rubber conveyor belt.

[0016] In a preferred embodiment, the storage portion includes a guide bin, a screening bin, a storage bin, a sliding rod, a fixed seat and an elastic reset member. The inner side of the guide bin is fixedly connected to the outer edge of the guide cylinder, one end of the screening bin is rotatably connected to the interior of the guide bin, the storage bin is arranged at the lower end of the screening bin, the interior of the storage bin cooperates with the lower end of the screening bin, one end of the sliding rod is slidably connected to the interior of the lower end of the screening bin, the other end of the sliding rod contacts with the interior of the driving portion, the fixed seat is fixedly connected to the guide bin, the interior of the fixed seat is slidably connected to the interior of the sliding rod, and the elastic reset member is arranged between the fixed seat and the sliding rod.

[0017] In a preferred embodiment, guide plates are provided on both sides of the guide bin, and the guide plates guide the metal powder to the other two sides of the guide bin.

[0018] In a preferred embodiment, a screen is fixedly provided at the lower end of the interior of the screening bin, and the screen at the lower end of the screening bin is located inside the storage bin.

[0019] In a preferred embodiment, the driving part includes a driving motor, a driving gear, a driving rod and a driven gear. The driving motor is fixedly connected to the inside of the mounting seat. Two driving gears are provided, wherein the tooth center of one driving gear is fixedly connected to the output end of the driving motor, the lower end of the driving rod is fixedly connected to the tooth center of the driving gear, the upper end of the driving rod cooperates with the other end of the sliding rod, the outer edge of the driven gear is meshed with the outer edges of the two driving gears, and the tooth center of the driven gear is threadedly connected to the outer edge of the lifting screw.

[0020] In a preferred embodiment, an eccentric column is disposed inside the upper end of the driving rod, the axis of the eccentric column is away from the axis of the driving rod, and the outer edge of the eccentric column is in contact with the other end of the sliding rod.

[0021] In a preferred embodiment, rotating wheels are rotatably provided at both ends of the sliding rod, and the outer edges of the rotating wheels are in contact with the lower end of the corresponding screening bin and the outer edge of the eccentric column.

[0022] The technical effects achieved by the present invention are:

[0023] The present invention adopts the design of the support part, which supports the metal powder entering the interior in a movable manner, so as to prevent the metal powder from rubbing against the outer wall and being unable to fall down, thereby forming a cavity, thereby making the metal powder in the upper layer unable to fall down and gradually thickening, or the cavity collapses, causing the metal powder in the upper layer to form a concave area, which can affect the subsequent spreading uniformity of the metal powder, and further affect the quality of the metal powder after melting and molding;

[0024] The present invention adopts the design of the storage part, which can store the metal powder discharged from the support part and screen the unused metal powder and the waste slag after melting, thereby improving the recycling rate of the metal powder and preventing the metal residue from affecting the quality of the finished product when the metal powder is used next time.

[0025] The present invention adopts a design of a driving part, which can drive the internal tray of the supporting part to move in a vertical direction. At the same time, the power of the driving part can also drive the storage part to swing and screen, thereby improving the utilization efficiency of the power of the driving part. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of an embodiment of the present invention;

[0027] Figure 2 is an overall internal schematic diagram of an embodiment of the present invention;

[0028] Figure 3 is an overall side sectional view of an embodiment of the present invention;

[0029] Figure 4 An embodiment of the present invention Figure 3 Schematic diagram at A in the middle;

[0030] Figure 5 is an exploded view of a support portion of an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of a limiting plate and a limiting belt in an embodiment of the present invention;

[0032] Figure 7 It is an exploded view of the driving part and the storage part of an embodiment of the present invention;

[0033] Figure 8 is a cross-sectional view of an eccentric column and a sliding rod according to an embodiment of the present invention;

[0034] Fig. 9 It is an exploded view of the driving part of an embodiment of the present invention.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 1. Mounting seat; 2. Support part; 201. Guide cylinder; 202. Limiting plate; 2021. Guide frame; 2022. Limiting wheel; 203. Tray; 204. Limiting belt; 205. Lifting screw; 3. Storage part; 301. Guide bin; 3011. Guide plate; 302. Screening bin; 303. Storage bin; 304. Sliding rod; 3041. Rotating wheel; 305. Fixed seat; 306. Elastic reset member; 4. Driving part; 401. Driving motor; 402. Driving gear; 403. Driving rod; 4031. Eccentric column; 404. Driven gear. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0040] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0041] See also Figures 1 to 9 As shown, the present invention provides a support structure based on additive manufacturing, including a mounting seat 1, a support portion 2 is arranged on the upper part of the mounting seat 1, and the support portion 2 supports the metal powder entering the interior to move and prevent the metal powder from rubbing against the cylinder wall and forming a cavity during the downward movement of the metal powder;

[0042] The outer edge of the support part 2 is provided with a storage part 3, which can store the metal powder discharged from the support part 2 and screen the unused metal powder and the waste residue after melting, thereby improving the recycling rate of the metal powder and preventing the metal residue from affecting the quality of the finished product when the metal powder is used next time;

[0043] The lower ends of the support part 2 and the storage part 3 are connected with a driving part 4, which can drive the interior of the support part 2 to move in a vertical direction. At the same time, the power of the driving part 4 can also drive the storage part 3 to shake and screen, thereby improving the utilization efficiency of the power of the driving part 4;

[0044] The supporting part 2 includes a guide cylinder 201, a limiting plate 202, a tray 203, a limiting belt 204, and a lifting screw 205. The lower end of the guide cylinder 201 is fixedly connected to the upper part of the mounting seat 1. Four limiting plates 202 are provided, and the four limiting plates 202 are fixedly connected to the inside of the guide cylinder 201. The tray 203 is slidingly arranged inside the guide cylinder 201. Four limiting belts 204 are provided, and the ends of the four limiting belts 204 are fixedly connected to the outer edge of the tray 203. The limiting belts 204 cooperate with the four inner sides of the guide cylinder 201. The inner side of the limiting belt 204 is slidably connected to the outer edge of the limiting plate 202, and the upper end of the lifting screw 205 is fixedly connected to the lower end of the tray 203.

[0045] Specifically, the driving unit 4 drives the lifting screw 205 to lift the tray 203 to the upper end of the guide cylinder 201. At this time, the powder spreading device of the equipment spreads powder on the upper end of the tray 203, and then the laser device melts and shapes the metal powder on the upper part of the tray 203. Then the driving unit 4 drives the lifting screw 205 to drive the tray 203 to move downward, and at the same time, the tray 203 drives the limiting belt 204 to move at the limiting plate 202. The limiting belt 204 provides four-sided support for the metal powder on the upper part of the tray 203, so that the limiting belt 204 can descend together with the metal powder, so as to avoid the subsequent metal powder from forming cavities due to movement friction. Whether the cavity exists or collapses, it will cause unevenness of the upper metal powder and uneven subsequent powder spreading, thereby affecting the quality of the melted metal product.

[0046] After the printing is finished, the driving unit 4 drives the lifting screw 205 and the tray 203 to rise together, so that the finished product and the unused metal powder are moved out of the guide cylinder 201 together, and then the metal powder is swept into the storage unit 3;

[0047] The driving part 4 drives the lifting screw 205 to rise and fall while driving the interior of the storage part 3 to swing, so that the storage part 3 can screen the collected metal powder, separate the metal powder from the waste slag, ensure the purity of the metal powder, and improve the utilization efficiency and quality of the metal powder.

[0048] See also Figure 6 As shown, a guide frame 2021 is provided at the upper end of the limiting plate 202, and the protruding part of the guide frame 2021 cooperates with the interior of the storage portion 3. The guide frame 2021 provides guidance for the moving limiting belt 204, so that the limiting belt 204 at the guide frame 2021 protrudes toward the interior of the storage portion 3, so that the metal powder on the upper part of the limiting belt 204 falls into the interior of the storage portion 3, reducing the metal powder attached to the surface of the limiting belt 204.

[0049] See also Figure 6 As shown, the guide frame 2021 is internally rotatably provided with a limiting wheel 2022, and the outer edge of the limiting wheel 2022 contacts the inner side of the limiting belt 204, thereby reducing the friction between the limiting belt 204 and the guide frame 2021 during the movement, thereby increasing the service life of the limiting belt 204.

[0050] See also Figures 4 to 6As shown, the limiting belt 204 is a flexible rubber conveyor belt. The limiting belt 204 can move on the outer edge of the special-shaped limiting plate 202 by utilizing its own flexibility, so that the limiting belt 204 can drive the metal powder inside the guide cylinder 201 to move together, thereby avoiding the friction between the metal powder and the outer wall and preventing it from falling and forming a cavity, thereby making the upper layer of metal powder unable to fall and gradually thicken, or the cavity collapses and causes the upper layer of metal powder to form a concave area, both of which can affect the quality of the metal powder after melting and molding.

[0051] See also Figure 7 As shown, the storage portion 3 includes a guide bin 301, a screening bin 302, a storage bin 303, a sliding rod 304, a fixed seat 305 and an elastic reset member 306. The inner side of the guide bin 301 is fixedly connected to the outer edge of the guide cylinder 201, one end of the screening bin 302 is rotatably connected to the inside of the guide bin 301, the storage bin 303 is arranged at the lower end of the screening bin 302, the interior of the storage bin 303 cooperates with the lower end of the screening bin 302, one end of the sliding rod 304 is slidably connected to the interior of the lower end of the screening bin 302, the other end of the sliding rod 304 contacts the interior of the driving portion 4, the fixed seat 305 is fixedly connected to the guide bin 301, the interior of the fixed seat 305 is slidably connected to the interior of the sliding rod 304, and the elastic reset member 306 is arranged between the fixed seat 305 and the sliding rod 304;

[0052] The guide bin 301 provides guidance for the incoming metal powder so that the metal powder can enter the interior of the screening bin 302. The metal powder is inside the screening bin 302. During the rotation of the driving unit 4, the sliding rod 304 can be squeezed to move inside the fixed seat 305. The elastic reset member 306 is used to ensure that the sliding rod 304 is always in an extended state and in contact with the interior of the driving unit 4. The movement of the sliding rod 304 can drive the screening bin 302 to swing. The swing of the screening bin 302 can screen the waste slag and the unused metal powder, and the unused metal powder falls into the storage bin 303 for storage. The interior of the storage bin 303 can be connected to the interior of the powder spreading device through the equipment to replenish the powder spreading device.

[0053] See also Figure 7 As shown, guide plates 3011 are provided on both sides of the guide bin 301, and the guide plates 3011 guide the metal powder to the other two sides of the guide bin 301. The guide plates 3011 are arranged as inclined surfaces, and the lower ends of the guide plates 3011 cooperate with the interior of the screening bin 302. The inclined guide plates 3011 are utilized to provide guidance for the fallen metal powder, so that the metal powder on the upper part of the guide bin 301 is guided to the interior of the screening bin 302, thereby causing the metal powder to gather inside the guide bin 301.

[0054] See also Figure 3and Figure 7 As shown, a screen is fixedly installed at the lower end of the interior of the screening bin 302, and the screen at the lower end of the screening bin 302 is located inside the storage bin 303. The gold powder inside the screening bin 302 is screened at the screening net by shaking the screening bin 302, so that the metal powder and the waste slag are separated from each other, thereby ensuring the purity of the metal powder.

[0055] See also Figure 7 and Fig. 9 As shown, the driving part 4 includes a driving motor 401, a driving gear 402, a driving rod 403 and a driven gear 404. The driving motor 401 is fixedly connected to the inside of the mounting base 1. Two driving gears 402 are provided, wherein the tooth center of one driving gear 402 is fixedly connected to the output end of the driving motor 401, the lower end of the driving rod 403 is fixedly connected to the tooth center of the driving gear 402, the upper end of the driving rod 403 is matched with the other end of the sliding rod 304, the outer edge of the driven gear 404 is meshed with the outer edges of the two driving gears 402, and the tooth center of the driven gear 404 is threadedly connected to the outer edge of the lifting screw 205;

[0056] The output end of the driving motor 401 drives the corresponding driving rod 403 to rotate, the rotation of the driving gear 402 drives the driven gear 404 to rotate, and the rotation of the driven gear 404 can drive another driving gear 402 to rotate, thereby realizing the linkage between the driving gear 402 and the driven gear 404;

[0057] The rotation of the driving gear 402 drives the driving rod 403 to rotate. The rotation of the driving rod 403 can squeeze the sliding rod 304 to slide horizontally inside the fixing seat 305. The sliding of the sliding rod 304 in the horizontal direction drives the screening bin 302 to move, thereby achieving shaking screening of the metal powder inside the screening bin 302.

[0058] At the same time, the rotation of the driven gear 404 can drive the threaded lifting screw 205 to move in the vertical direction, and the vertical movement of the tray 203 inside the guide cylinder 201 is realized by the movement of the lifting screw 205;

[0059] Furthermore, the number of teeth of the driven gear 404 is greater than the number of teeth of the driving gear 402, and the threads on the outer edge of the lifting screw 205 are densely opened, so that the driving gear 402 needs to rotate more circles to drive the driven gear 404 to rotate one circle. The multiple circles of rotation of the driving gear 402 can make the sliding rod 304 slide multiple times, so that the screening bin 302 can be shaken and screened multiple times;

[0060] At the same time, one rotation of the driven gear 404 can only make the lifting screw 205 move slightly vertically, thereby providing space for metal powder to be spread on the upper part of the guide cylinder 201. The moving accuracy of the lifting screw 205 can be improved by moving more slowly, thereby improving the quality of the finished product.

[0061] See also Figure 8 As shown, an eccentric column 4031 is disposed inside the upper end of the driving rod 403, the axis of the eccentric column 4031 is away from the axis of the driving rod 403, and the outer edge of the eccentric column 4031 is in contact with the other end of the sliding rod 304;

[0062] The rotation of the driving rod 403 can drive the eccentric column 4031 to rotate about the axis of the driving rod 403. Since the axis of the eccentric column 4031 is far away from the axis of the driving rod 403, when the eccentric column 4031 moves with the driving rod 403, the eccentric column 4031 rotates toward the direction of the sliding rod 304 and can squeeze one end of the sliding rod 304, so that the sliding rod 304 slides out.

[0063] When the eccentric column 4031 rotates past the sliding rod 304, one end of the sliding rod 304 loses the squeezing of the eccentric column 4031. At this time, the sliding rod 304 is squeezed by the elastic reset member 306 and extends out, so that one end of the sliding rod 304 is always in contact with the outer edge of the eccentric column 4031.

[0064] At this point, the telescopic movement of the sliding rod 304 is achieved through the cooperation between the eccentric column 4031 and the elastic reset member 306 .

[0065] See also Figure 8 and Fig. 9 As shown, rotating wheels 3041 are rotatably provided at both ends of the sliding rod 304, and the outer edge of the rotating wheel 3041 contacts the lower end of the corresponding screening bin 302 and the outer edge of the eccentric column 4031. The rotating wheel 3041 can transform the contact between the two ends of the sliding rod 304 and the screening bin 302 and the eccentric column 4031 into the rolling friction of the rotating wheel 3041, thereby reducing the friction between the sliding rod 304 and the screening bin 302 and the eccentric column 4031, and improving the service life of the sliding rod 304.

[0066] The working principle of the present invention is as follows: the driving unit 4 drives the lifting screw 205 to lift the tray 203 to the upper end of the guide cylinder 201. At this time, the powder spreading device of the equipment spreads powder on the upper end of the tray 203, and then the laser device melts and shapes the metal powder on the upper part of the tray 203. Then the driving unit 4 drives the lifting screw 205 to drive the tray 203 to move downward, and at the same time, the tray 203 drives the limiting belt 204 to move at the limiting plate 202. The limiting belt 204 provides four-sided support for the metal powder on the upper part of the tray 203, so that the limiting belt 204 can descend together with the metal powder, avoiding the subsequent metal powder from forming cavities due to movement friction. Whether the cavity exists or collapses, it will cause unevenness of the upper metal powder and uneven subsequent powder spreading, thereby affecting the quality of the melted metal product.

[0067] After the printing is finished, the driving unit 4 drives the lifting screw 205 and the tray 203 to rise together, so that the finished product and the unused metal powder are moved out of the guide cylinder 201 together, and then the metal powder is swept into the storage unit 3;

[0068] The driving part 4 drives the lifting screw 205 to rise and fall while driving the interior of the storage part 3 to swing, so that the storage part 3 can screen the collected metal powder, separate the metal powder from the waste slag, ensure the purity of the metal powder, and improve the utilization efficiency and quality of the metal powder.

[0069] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A support structure based on additive manufacturing, characterized in that: It comprises a mounting seat (1), wherein a support portion (2) is arranged on the upper portion of the mounting seat (1), and the support portion (2) provides movement support for metal powder entering the interior, thereby preventing the metal powder from rubbing against the cylinder wall and forming a cavity during the downward movement of the metal powder; The outer edge of the support portion (2) is provided with a receiving portion (3), and the receiving portion (3) is capable of receiving the metal powder discharged from the support portion (2), and screening the metal powder so that the unused metal powder and the waste residue after melting are screened and removed, thereby improving the recycling rate of the metal powder and also preventing the metal residue from affecting the quality of the finished product when the metal powder is used for the next time; The lower ends of the support portion (2) and the storage portion (3) are connected to a driving portion (4), and the driving portion (4) can drive the interior of the support portion (2) to move in a vertical direction. At the same time, the power of the driving portion (4) can also drive the storage portion (3) to shake and screen, thereby improving the utilization efficiency of the power of the driving portion (4); The support portion (2) comprises a guide cylinder (201), a limit plate (202), a tray (203), a limit belt (204), and a lifting screw (205); the lower end of the guide cylinder (201) is fixedly connected to the upper part of the mounting seat (1); four limit plates (202) are provided, and the four limit plates (202) are fixedly connected to the inside of the guide cylinder (201); the tray (203) is slidingly arranged inside the guide cylinder (201); four limit belts (204) are provided, and the ends of the four limit belts (204) are fixedly connected to the outer edge of the tray (203); the inner side of the limit belt (204) is slidably connected to the outer edge of the limit plate (202); and the upper end of the lifting screw (205) is fixedly connected to the lower end of the tray (203); The limiting belt (204) is a flexible rubber conveyor belt as a whole.

2. The support structure based on additive manufacturing according to claim 1, characterized in that: A guide frame (2021) is provided at the upper end of the limiting plate (202), and a protruding portion of the guide frame (2021) cooperates with the interior of the storage portion (3).

3. The support structure based on additive manufacturing according to claim 2, characterized in that: A limiting wheel (2022) is rotatably arranged inside the guide frame (2021), and the outer edge of the limiting wheel (2022) is in contact with the inner side of the limiting belt (204).

4. The support structure based on additive manufacturing according to claim 1, characterized in that: The storage portion (3) comprises a guide bin (301), a screening bin (302), a storage bin (303), a sliding rod (304), a fixing seat (305) and an elastic reset member (306); the inner side of the guide bin (301) is fixedly connected to the outer edge of the guide cylinder (201); one end of the screening bin (302) is rotatably connected to the inside of the guide bin (301); the storage bin (303) is arranged at the lower end of the screening bin (302); the inside of the storage bin (303) is connected to the guide cylinder (201); The guide chamber (301) is matched with the lower end of the screening chamber (302), one end of the sliding rod (304) is slidably connected to the interior of the lower end of the screening chamber (302), the other end of the sliding rod (304) is in contact with the interior of the driving portion (4), the fixing seat (305) is fixedly connected to the guide chamber (301), the interior of the fixing seat (305) is slidably connected to the interior of the sliding rod (304), and the elastic reset member (306) is arranged between the fixing seat (305) and the sliding rod (304).

5. The support structure based on additive manufacturing according to claim 4, characterized in that: Guide plates (3011) are provided on two sides inside the guide bin (301), and the guide plates (3011) guide the metal powder to the other two sides of the guide bin (301).

6. The support structure based on additive manufacturing according to claim 4, characterized in that: A screen is fixedly provided at the lower end of the interior of the screening bin (302), and the screen at the lower end of the screening bin (302) is located inside the storage bin (303).

7. The support structure based on additive manufacturing according to claim 1, characterized in that: The driving part (4) comprises a driving motor (401), a driving gear (402), a driving rod (403) and a driven gear (404); the driving motor (401) is fixedly connected to the inside of the mounting base (1); two driving gears (402) are provided, wherein the center of the teeth of one driving gear (402) is fixedly connected to the output end of the driving motor (401); the lower end of the driving rod (403) is fixedly connected to the center of the teeth of the driving gear (402); the upper end of the driving rod (403) cooperates with the other end of the sliding rod (304); the outer edge of the driven gear (404) is meshed with the outer edges of the two driving gears (402); and the center of the teeth of the driven gear (404) is threadedly connected to the outer edge of the lifting screw (205).

8. The support structure based on additive manufacturing according to claim 7, characterized in that: An eccentric column (4031) is disposed inside the upper end of the driving rod (403), the axis of the eccentric column (4031) is away from the axis of the driving rod (403), and the outer edge of the eccentric column (4031) is in contact with the other end of the sliding rod (304).

9. The support structure based on additive manufacturing according to claim 4, characterized in that: Rotating wheels (3041) are rotatably provided at both ends of the sliding rod (304), and the outer edges of the rotating wheels (3041) are in contact with the lower ends of the corresponding screening bins (302) and the outer edges of the eccentric columns (4031).

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