阅读说明：本技术 一种可定量选区双向铺粉的大型细长类零件打印设备 (Large-scale long and thin part printing equipment capable of quantitatively selecting area and bidirectionally spreading powder ) 是由 张琦 文楚玥 王寅 陈宇凯 于 2021-08-23 设计创作，主要内容包括：一种可定量选区双向铺粉的大型细长类零件打印设备,包括机架,机架上部连接有铺粉装置；机架底部对称安装有2个第一步进电机,第一步进电机通过第一丝杠与托板轴连接,托板轴顶部与第一落粉板连接；机架内部中间位置连接有第二落粉板,第二落粉板中部与磁吸连接,通过磁吸实现与第一落粉板连接；机架中部位置安装有第二步进电机,第二步进电机通过第二丝杠与基板轴连接,基板轴顶部与打印基板连接；本发明可根据零件形状实现定量选区铺粉,提升双向铺粉的工作精度及稳定性,实现粉末回收利用,具有控制灵敏、结构稳定、降低成本等优点。(A large-scale slender part printing device capable of realizing quantitative, area-selective and bidirectional powder spreading comprises a rack, wherein a powder spreading device is connected to the upper part of the rack; 2 first stepping motors are symmetrically installed at the bottom of the rack, the first stepping motors are connected with the supporting plate shaft through first lead screws, and the top of the supporting plate shaft is connected with a first powder falling plate; the middle position in the rack is connected with a second powder falling plate, the middle part of the second powder falling plate is connected with a magnetic attraction, and the second powder falling plate is connected with the first powder falling plate through the magnetic attraction; a second stepping motor is arranged in the middle of the rack and connected with the substrate shaft through a second lead screw, and the top of the substrate shaft is connected with the printing substrate; the powder spreading device can realize quantitative selective powder spreading according to the shape of the part, improves the working precision and stability of bidirectional powder spreading, realizes powder recycling, and has the advantages of sensitive control, stable structure, cost reduction and the like.)

1. The utility model provides a two-way large-scale slender type part printing apparatus who spreads powder in quantitative selected area, includes frame (1), its characterized in that: the upper part of the frame (1) is connected with a powder paving device fixing piece (2), and the powder paving device fixing piece (2) is connected with a powder paving device (3);

2 first stepping motors (8) are symmetrically arranged at the bottom of the rack (1), the first stepping motors (8) are connected with the bottoms of first lead screws (7), the first lead screws (7) are connected with a supporting plate shaft (6), and the top of the supporting plate shaft (6) is connected with a first powder falling plate (12);

a second powder falling plate (5) is connected to the middle position in the rack (1), the middle part of the second powder falling plate (5) is connected with a magnetic attraction (4), and the second powder falling plate is connected with a first powder falling plate (12) through the magnetic attraction (4);

a second stepping motor (14) is installed in the middle of the rack (1), the second stepping motor (14) is connected with the bottom of a second lead screw (11), the second lead screw (11) is connected with a substrate shaft (10), and the top of the substrate shaft (10) is connected with a printing substrate (9).

2. The large-scale long and thin part printing equipment capable of realizing quantitative, selective and bidirectional powder spreading is characterized in that: a powder dropping bin (101) is arranged at the upper part of the frame (1);

the upper part of the frame (1) is connected with a bracket slot (102), and the bracket slot (102) is used for placing a powder laying device fixing piece (2);

a first motor groove (105) and a second motor groove (108) are formed in the rack (1), the first stepping motor (8) is placed in the first motor groove (105), and the second stepping motor (14) is placed in the second motor groove (108);

a powder falling plate groove (104) is formed in the middle of the rack (1), powder falling plate guide rails (109) are arranged on two sides of the powder falling plate (104), and a second powder falling plate (5) is placed in the powder falling plate groove (104);

both sides of the upper part of the frame (1) are provided with cleaning grooves (106), and the lower ends of the cleaning grooves (106) are communicated with the second powder falling plate (5);

a printing substrate groove (103) is formed in the middle of the upper part of the rack (1), and printing substrate guide rail grooves (107) are formed in two sides of the printing substrate groove (103);

four corner positions at the bottom of the rack (1) are provided with rack bases (1010) for supporting the whole rack (1).

3. The large-scale long and thin part printing equipment capable of realizing quantitative, selective and bidirectional powder spreading is characterized in that: more than 3 powder falling blocks (302) are uniformly distributed on the left side and the right side of the upper part of the powder spreading device (3), and powder is uniformly distributed on two sides when the powder falling bin (101) falls; more than 3 first powder spreading stepping motors (309) are uniformly distributed on the left side and the right side of the middle part of the powder spreading device (3), the first powder spreading stepping motors (309) are connected with a first powder spreading screw rod (303), and the powder is quantitatively fed in a selected area by controlling the rotation of the first powder spreading screw rod (303) at different positions at different angles; a second powder spreading stepping motor (305) and a third powder spreading stepping motor (3010) are arranged at the lower part of the powder spreading device (3); the second powder spreading stepping motor (305) is connected with the bottom of a second powder spreading lead screw (307), and the head of the second powder spreading lead screw (307) is inserted into the first powder spreading scraper (308) to realize the up-and-down movement of the first powder spreading scraper (308); the third powder spreading stepping motor (3010) is connected with the bottom of a third powder spreading lead screw (3012), and the head of the third powder spreading lead screw (3012) is inserted into a second powder spreading scraper (3013) to realize the up-and-down movement of the second powder spreading scraper (3013); the bidirectional powder scraping of the powder paving scraper is realized by coordinating the control of the second powder paving stepping motor (305) and the third powder paving stepping motor (3010).

4. The large-scale long and thin part printing equipment capable of realizing quantitative, selective and bidirectional powder spreading is characterized in that: the printing substrate (9) comprises equidistant equal-diameter circular pipes (901), and the equidistant equal-diameter circular pipes (901) are connected through a printing support structure (903); printing substrate holes (902) are formed in the periphery of the printing substrate (9) and are convenient to connect with the substrate shaft (10); printing substrate guide rails (904) are arranged on two sides of the printing substrate (9), and the printing substrate guide rails (904) are matched with the printing substrate guide rail grooves (107); a printing substrate groove (905) is formed in the bottom of the printing substrate (9), and the printing substrate groove (905) is matched with the first powder falling plate (12); the printing substrate (9) is manufactured by 3D printing.

5. The large-scale long and thin part printing equipment capable of realizing quantitative, selective and bidirectional powder spreading is characterized in that: the top of the substrate shaft (10) is provided with a support rod (1001), and the support rod (1001) is connected with the printing substrate hole (902); the inner part of the substrate shaft (10) is a substrate shaft inner cavity (1002), and the substrate shaft inner cavity (1002) is connected with the second lead screw (11).

6. The large-scale long and thin part printing equipment capable of realizing quantitative, selective and bidirectional powder spreading is characterized in that: before printing begins, a first stepping motor (8) works, a supporting plate shaft (6) drives a first powder falling plate (12) to ascend, and the first powder falling plate (12) is embedded into a printing substrate groove (905) to provide support for powder which just begins to be printed; in the initial stage of printing, a second stepping motor (14) works, a substrate shaft (10) drives a printing substrate (9) to descend layer by layer, a first stepping motor (8) works, and a support plate shaft (6) drives a first powder falling plate (12) to descend synchronously to realize layered printing and forming; after printing is carried out for a period of time, the second stepping motor (14) works, and the substrate shaft (10) drives the printing substrate (9) to descend after printing layer by layer; the bottom of a printed part is formed, the working speed of a first stepping motor (8) is increased, a supporting plate shaft (6) drives a first powder falling plate (12) to descend to the position of a powder falling plate groove (102), the first powder falling plate is connected with a second powder falling plate (5) through a magnetic attraction (4), real-time powder receiving is realized, powder in the powder falling plate is sieved and the like, and the powder is recycled; after printing is finished, fine residual powder on the upper surface of the rack (1) is swept into the second powder falling plate (5) through the cleaning groove (106), and the powder in the second powder falling plate (5) is sieved, so that the recycling of the powder is realized.

Technical Field

The invention relates to the technical field of additive manufacturing, in particular to large-scale slender part printing equipment capable of quantitatively selecting areas and bidirectionally spreading powder.

Background

In the existing powder bed printing, the traditional bidirectional powder spreading device adopts an impact reversing mode, so that the working precision of a scraper is influenced, the service cycle of equipment is reduced, the daily maintenance frequency is increased, the printing efficiency is influenced, and the cost is increased; meanwhile, the traditional powder paving device feeds powder through the whole area of the powder leakage groove, so that the powder consumption is large, and the powder material is wasted; the traditional printing substrate is a circular substrate with the diameter of 250mm, the size of a printing part is greatly influenced by the size of the substrate, the shape of the printing part is also limited, and the printing substrate cannot be suitable for printing large and thin parts (parts with the length-width ratio larger than 1 and the length larger than 250mm), so that the printing space is increased, the difficulty of space atmosphere protection is improved, and the printing efficiency and the wide use of printing equipment are influenced; the powder is retrieved in the manual work after traditional printing apparatus prints, can't retrieve the powder in real time, causes the powder material extravagant, increases and prints the cost.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the large-sized slender part printing equipment capable of quantitatively selecting the area and bidirectionally spreading the powder, which can realize the quantitative selecting area powder spreading according to the shape of the part, improve the working precision and stability of bidirectional powder spreading, realize the recycling of the powder, and has the advantages of sensitive control, stable structure, cost reduction and the like.

In order to achieve the purpose, the invention adopts the following technical scheme:

a large-scale slender part printing device capable of realizing quantitative and area-selective bidirectional powder spreading comprises a rack 1, wherein the upper part of the rack 1 is connected with a powder spreading device fixing part 2, and a powder spreading device 3 is connected to the powder spreading device fixing part 2;

2 first stepping motors 8 are symmetrically arranged at the bottom of the rack 1, the first stepping motors 8 are connected with the bottoms of first lead screws 7, the first lead screws 7 are connected with a supporting plate shaft 6, and the top of the supporting plate shaft 6 is connected with a first powder falling plate 12;

a second powder falling plate 5 is connected to the middle position in the rack 1, the middle part of the second powder falling plate 5 is connected with a magnetic suction 4, and the second powder falling plate is connected with a first powder falling plate 12 through the magnetic suction 4;

a second stepping motor 14 is installed in the middle of the rack 1, the second stepping motor 14 is connected with the bottom of a second lead screw 11, the second lead screw 11 is connected with a substrate shaft 10, and the top of the substrate shaft 10 is connected with a printing substrate 9.

A powder dropping bin 101 is arranged at the upper part of the frame 1;

the upper part of the frame 1 is connected with a bracket slot 102, and the bracket slot 102 is used for placing the powder paving device fixing piece 2;

a first motor groove 105 and a second motor groove 108 are formed in the frame 1, the first stepping motor 8 is placed in the first motor groove 105, and the second stepping motor 14 is placed in the second motor groove 108;

a powder falling plate groove 104 is formed in the middle of the rack 1, powder falling plate guide rails 109 are arranged on two sides of the powder falling plate 104, and a second powder falling plate 5 is placed in the powder falling plate groove 104;

cleaning grooves 106 are formed in two sides of the upper portion of the rack 1, and the lower ends of the cleaning grooves 106 are communicated with the second powder falling plate 5;

a printing substrate groove 103 is arranged in the middle of the upper part of the frame 1, and printing substrate guide rail grooves 107 are arranged on two sides of the printing substrate groove 103;

four angular positions at the bottom of the gantry 1 are provided with gantry mounts 1010 for supporting the entire gantry 1.

More than 3 powder falling blocks 302 are uniformly distributed on the left side and the right side of the upper part of the powder spreading device 3 respectively, and powder is uniformly distributed on the two sides when the powder falls in the powder falling bin 101; more than 3 first powder spreading stepping motors 309 are uniformly distributed on the left side and the right side of the middle part of the powder spreading device 3 respectively, the first powder spreading stepping motors 309 are connected with the first powder spreading screw rods 303, and the selective quantitative powder feeding is realized by controlling the rotation of the first powder spreading screw rods 303 at different positions at different angles; a second powder spreading stepping motor 305 and a third powder spreading stepping motor 3010 are arranged at the lower part of the powder spreading device 3; the second powder spreading stepping motor 305 is connected with the bottom of a second powder spreading screw 307, and the head of the second powder spreading screw 307 is inserted into the first powder spreading scraper 308, so that the first powder spreading scraper 308 moves up and down; the third powder spreading stepping motor 3010 is connected with the bottom of a third powder spreading lead screw 3012, and the head of the third powder spreading lead screw 3012 is inserted into a second powder spreading scraper 3013 to realize the up-and-down movement of the second powder spreading scraper 3013; the two-way powder scraping of the powder paving scraper is realized by coordinating the control of the second powder paving stepping motor 305 and the third powder paving stepping motor 3010.

The printing substrate 9 comprises equidistant equal-diameter circular tubes 901, and the equidistant equal-diameter circular tubes 901 are connected through a printing support structure 903; printing substrate holes 902 are formed in the periphery of the printing substrate 9, so that the printing substrate holes are conveniently connected with the substrate shaft 10; the two sides of the printing substrate 9 are provided with printing substrate guide rails 904, and the printing substrate guide rails 904 are matched with the printing substrate guide rail grooves 107; a printing substrate groove 905 is formed in the bottom of the printing substrate 9, and the printing substrate groove 905 is matched with the first powder falling plate 12; the printed substrate 9 is manufactured by 3D printing.

A support rod 1001 is arranged at the top of the substrate shaft 10, and the support rod 1001 is connected with the printing substrate hole 902; the substrate shaft 10 is internally provided with a substrate shaft inner cavity 1002, and the substrate shaft inner cavity 1002 is connected with the second lead screw 11.

Before printing begins, the first stepping motor 8 works, the supporting plate shaft 6 drives the first powder falling plate 12 to ascend, and the first powder falling plate 12 is embedded into the printing substrate groove 905 to provide support for powder which just begins to be printed; in the initial stage of printing, the second stepping motor 14 works, the substrate shaft 10 drives the printing substrate 9 to descend layer by layer, the first stepping motor 8 works, the supporting plate shaft 6 drives the first powder falling plate 12 to descend synchronously, and layered printing forming is realized; after printing is carried out for a period of time, the second stepping motor 14 works, and the substrate shaft 10 drives the printing substrate 9 to descend after printing layer by layer; the bottom of a printed part is formed, the working speed of a first stepping motor 8 is increased, a supporting plate shaft 6 drives a first powder falling plate 12 to descend to the position of a powder falling plate groove 102, the first powder falling plate is connected with a second powder falling plate 5 through a magnetic attraction 4, real-time powder receiving is realized, powder in the powder falling plate is sieved, and the powder recycling is realized; after the printing is finished, the fine residual powder on the upper surface of the rack 1 is swept into the second powder falling plate 5 through the cleaning groove 106, and the powder in the second powder falling plate 5 is sieved, so that the recycling of the powder is realized.

The invention has the beneficial effects that:

(1) the powder paving device 3 can realize quantitative selective powder paving of the powder paving device, reduce powder loss and reduce cost.

(2) According to the invention, through coordinating the control of the second powder spreading stepping motor 305 and the third powder spreading stepping motor 3010, the electric control bidirectional powder spreading is realized, the equipment loss is reduced, and the production efficiency is improved.

(3) The invention adopts the printing substrate 9 suitable for large-scale slender parts, reduces the printing space, further reduces the atmosphere protection space, improves the production efficiency and reduces the cost

(4) The printing substrate 9, the first powder falling plate 6 and the lifting structure thereof have unique designs, so that the powder is recovered in real time, and the cost is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of the rack 1 according to the present invention.

Fig. 3 is a schematic structural diagram of the powder spreading device 3 of the present invention.

Fig. 4 is a schematic structural diagram of the printing substrate 9 according to the present invention.

FIG. 5 is a schematic view of the frame removing and powder spreading device of the present invention.

FIG. 6 is a schematic view of a powder spreading and selecting area of a large-sized slender part according to the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1 and 2, the printing equipment for the large-sized long and thin parts capable of realizing quantitative, selective and bidirectional powder spreading comprises a rack 1, wherein the upper part of the rack 1 is connected with a powder spreading device fixing part 2, and a powder spreading device 3 is connected to the powder spreading device fixing part 2;

2 first stepping motors 8 are symmetrically installed at the bottom of the rack 1, the first stepping motors 8 are connected with the bottoms of first lead screws 7 through first couplers 15, the first lead screws 7 are connected with the supporting plate shafts 6, and the tops of the supporting plate shafts 6 are connected with first powder dropping plates 12, so that the first powder dropping plates 12 can move up and down;

a second powder falling plate 5 is connected to the middle position inside the rack 1, the middle part of the second powder falling plate 5 is connected with a magnetic suction device 4, the second powder falling plate 5 is connected with a first powder falling plate 12 through the magnetic suction device 4, and the second powder falling plate is used for collecting residual powder on the rack 1 after printing is finished and recovering powder leaked from a printing substrate 9 in the printing process;

a second stepping motor 14 is installed in the middle of the rack 1, the second stepping motor 14 is connected with the bottom of a second lead screw 11 through a second coupler 13, the second lead screw 11 is connected with a substrate shaft 10, the top of the substrate shaft 10 is connected with a printing substrate 9, and the printing substrate 9 moves up and down.

Referring to fig. 2, a powder dropping bin 101 is arranged at the upper part of the frame 1;

the upper part of the frame 1 is connected with a bracket slot 102, and the bracket slot 102 is used for placing the powder paving device fixing piece 2;

a first motor groove 105 and a second motor groove 108 are formed in the frame 1, the first stepping motor 8 is placed in the first motor groove 105, and the second stepping motor 14 is placed in the second motor groove 108;

a powder falling plate groove 104 is formed in the middle of the rack 1, powder falling plate guide rails 109 are arranged on two sides of the powder falling plate 104, and a second powder falling plate 5 is placed in the powder falling plate groove 104;

cleaning grooves 106 are formed in two sides of the upper portion of the rack 1, and the lower ends of the cleaning grooves 106 are communicated with the second powder falling plate 5;

a printing substrate groove 103 is arranged in the middle of the upper part of the frame 1, and printing substrate guide rail grooves 107 are arranged on two sides of the printing substrate groove 103;

four angular positions at the bottom of the gantry 1 are provided with gantry mounts 1010 for supporting the entire gantry 1.

Referring to fig. 3, 6 powder falling blocks 302 are uniformly distributed on the left side and the right side of the upper part of the powder spreading device 3 respectively, and when powder falls in the powder falling bin 101, the powder is uniformly distributed on the two sides; 6 first powder spreading stepping motors 309 are uniformly distributed on the left side and the right side of the middle of the powder spreading device 3 respectively, the first powder spreading stepping motors 309 are connected with first powder spreading lead screws 303 through first powder spreading couplers 304, and the powder is quantitatively fed in a selected area by controlling the rotation of the first powder spreading lead screws 303 at different positions at different angles; a second powder spreading stepping motor 305 and a third powder spreading stepping motor 3010 are arranged at the lower part of the powder spreading device 3; the second powder spreading stepping motor 305 is connected with the bottom of a second powder spreading screw 307 through a second powder spreading coupler 306, and the head of the second powder spreading screw 307 is inserted into a first powder spreading scraper 308, so that the first powder spreading scraper 308 moves up and down; a third powder spreading stepping motor 3010 is connected with the bottom of a third powder spreading screw 3012 through a third powder spreading coupler 3011, and the head of the third powder spreading screw 3012 is inserted into a second powder spreading scraper 3013 to realize the up-and-down movement of the second powder spreading scraper 3013; the two-way powder scraping of the powder paving scraper is realized by coordinating the control of the second powder paving stepping motor 305 and the third powder paving stepping motor 3010.

Referring to fig. 4 and 5, the printing substrate 9 includes an equidistant equal-diameter circular tube 901, which facilitates real-time powder leakage; equidistant equal-diameter circular tubes 901 are connected through a printing support structure 903; printing substrate holes 902 are formed in the periphery of the printing substrate 9, so that the printing substrate holes are conveniently connected with the substrate shaft 10; the two sides of the printing substrate 9 are provided with printing substrate guide rails 904, and the printing substrate guide rails 904 are matched with the printing substrate guide rail grooves 107; a printing substrate groove 905 is formed in the bottom of the printing substrate 9, and the printing substrate groove 905 is matched with the first powder falling plate 12; the printed substrate 9 is manufactured by 3D printing.

Referring to fig. 4 and 5, a support rod 1001 is disposed on the top of the substrate shaft 10, and the support rod 1001 is connected to the print substrate hole 902 to support the print substrate 9; the substrate shaft 10 is internally provided with a substrate shaft inner cavity 1002, and the substrate shaft inner cavity 1002 is connected with the second lead screw 11.

Referring to fig. 1, 2, 3 and 6, a schematic part of a large-sized elongated part (with an aspect ratio greater than 1 and a length greater than 250mm) is placed on a printing substrate 9, before powder spreading is started, a powder dropping bin 101 drops powder to a powder spreading device 3, and the shape of the part is partitioned based on the shape of the part; the powder spreading device 3 works, the 12 first powder spreading motors 309 which are longitudinally arranged correspondingly work, the first powder spreading screw 303 controls the rotation angle of the first powder spreading screw 303 to quantitatively drop powder according to the area of parts in a corresponding area, when the corresponding area is not in a printing area, the first powder spreading screw 303 rapidly rotates to form a seal with the corresponding powder dropping block 302, the powder does not drop in the corresponding area, and the quantitative powder feeding in a selected area is realized. As shown in fig. 6, the black implementation area is a printed part area, the powder spreading area of the conventional powder feeding device is distributed over the entire plane of the printing substrate 9, and the dotted area is a quantitative powder spreading area of the present invention.

When the powder spreading device 3 spreads powder from the left limit position to the right limit position, the second powder spreading stepping motor 305 works, the first powder spreading scraper 308 is discharged downwards, the third powder spreading stepping motor 3010 works, and the second powder spreading scraper 3013 is retracted upwards to scrape powder; when the powder spreading device 3 spreads powder from the right limit position to the left limit position, the second powder spreading stepping motor 305 works, the first powder spreading scraper 308 is retracted upwards, the third powder spreading stepping motor 3010 works, and the second powder spreading scraper 3013 is discharged downwards to scrape powder, so that electronic control bidirectional powder spreading is realized.

The working principle of the invention is as follows:

in the process of printing large-sized slender parts (the length-width ratio is greater than 1 and the length is greater than 250mm), 12 stepping motors are uniformly distributed on the left and right sides to control lead screws at corresponding positions to rotate according to the shapes of the parts and based on the special structure of the powder spreading device 3, and therefore selective quantitative powder feeding is achieved. According to the relative position of the powder spreading scraper and the powder outlet, the powder spreading scraper works corresponding to the stepping motor, the powder spreading scraper is coordinated and controlled to be practical, and electric control bidirectional powder scraping is realized.

Before printing begins, the first stepping motor 8 works, the supporting plate shaft 6 drives the first powder falling plate 12 to ascend, and the first powder falling plate 12 is embedded into the printing substrate groove 905 to provide support for powder which just begins to be printed; in the initial stage of printing, the second stepping motor 14 works, the substrate shaft 10 drives the printing substrate 9 to descend layer by layer, the first stepping motor 8 works, the supporting plate shaft 6 drives the first powder falling plate 12 to descend synchronously, and layered printing forming is realized; after printing is carried out for a period of time, the second stepping motor 14 works, and the substrate shaft 10 drives the printing substrate 9 to descend after printing layer by layer; the bottom of a printed part is formed, the working speed of a first stepping motor 8 is increased, a supporting plate shaft 6 drives a first powder falling plate 12 to descend to the position of a powder falling plate groove 102, the first powder falling plate is connected with a second powder falling plate 5 through a magnetic attraction 4, real-time powder receiving is realized, powder in the powder falling plate is sieved, and the powder recycling is realized; after printing is finished, the fine residual powder on the upper surface of the rack 1 is swept into the second powder falling plate 5 through the cleaning groove 106, and the powder in the second powder falling plate 5 is sieved and the like, so that the recycling of the powder is realized.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.