CN115121814A - Automatic powder paving device - Google Patents

Abstract

The invention belongs to the technical field of laser melting, and particularly relates to an automatic powder spreading device which comprises a connecting plate, support frames symmetrically arranged at four corners of the bottom surface of the connecting plate, pad feet fastened on one sides of the support frames far away from the connecting plate through bolts, a guide rail fastened on the surface of the connecting plate through bolts, a powder spreading frame connected with the surface of the guide rail in a sliding mode, a powder falling bin welded on one side of the surface of the powder spreading frame, a connecting piece and a supporting piece fastened on two sides of the surface of the connecting plate through bolts respectively, and ball screw nut pairs A arranged on two sides, located on the guide rail, of the surface of the connecting plate; through setting up motor B, after will treating to spread the powder component and arrange the connecting plate surface in, motor B drives the vice A rotation of ball screw nut at the during operation, through adding the powder to falling in the powder storehouse this moment, makes the support frame in the removal can spread the powder operation to the component of passing on the way to when realizing removing to spread the powder, guarantee to spread the powder completely.

Description

An automatic powder spreading device

technical field

The invention belongs to the technical field of laser melting, and in particular relates to an automatic powder spreading device.

Background technique

Selective laser melting is a main technical approach in metal material additive manufacturing. This technology selects laser as the energy source and scans the metal powder bed layer by layer according to the path planned in the 3D CAD slice model. The powder is melted and solidified to achieve the effect of metallurgical bonding, and finally the metal parts designed by the model are obtained. The published patent (patent CN201720363877.6) discloses a double-blade type fast powder-changing scraper for laser selective melting and molding equipment. The scraper is replaced during the powder spreading operation. At present, most SLM powder spreading equipment uses scrapers to spread powder, and the particles in the powder will be blocked by the scraper, which will cause the particles to block the powder along the way, resulting in incomplete powder spreading, and After the powder is spread, the powder is only attached to the metal surface without being compacted, and is easily splashed by the wind, and the cutter head is easily worn due to long-term contact with the component.

In order to solve the above problems, the present application proposes an automatic powder spreading device.

SUMMARY OF THE INVENTION

In order to solve the problems raised in the above background art. The invention provides an automatic powder spreading device, which has the characteristics of powder spreading and compaction and automatic feeding.

In order to achieve the above purpose, the present invention provides the following technical solutions: an automatic powder spreading device, comprising a connecting plate, a support frame symmetrically arranged at the four corners of the bottom surface of the connecting plate, and bolts fastened on the support frame away from the The foot on one side of the connecting plate also includes a guide rail fastened with bolts on the surface of the connecting plate. The surface of the guide rail is slidably connected with a powder spreading rack, and a powder dropping bin is welded on the surface side of the powder spreading rack. The two sides of the plate surface are respectively bolted with connecting pieces and support pieces, the connecting plate surface is located on both sides of the guide rail with a ball screw nut pair A, and the two ends of the ball screw nut pair A are respectively connected with the The connecting piece and the supporting piece are rotatably connected, and a thrust bearing is fastened with bolts at the position of the surface of the connecting piece corresponding to the ball screw nut pair A, and the thrust bearing is sleeved on the ball screw nut pair A outside and is rotatably connected with the ball screw nut pair A, the side of the sliding seat surface screwed on the surface of the ball screw nut pair A is fixedly connected with the surface of the powder spreading rack, and the surface of the support member corresponds to the A motor B is fixedly installed at the position of the ball screw nut pair A, and the output shaft of the motor B penetrates the surface of the support member and is fixedly provided with a coupling A, and through the coupling A and the balls One end of the screw nut pair A is fixedly connected.

As an automatic powder spreading device of the present invention, preferably, the guide rails are symmetrically arranged and distributed on both sides of the extension of the connecting plate, and are fastened with bolts on the surface of the powder spreading rack by sliding sleeves sliding on the surface of the guide rails. solid.

As an automatic powder spreading device of the present invention, preferably, a notch A and a notch B are opened on the surface of the connecting plate on one side of the powder hopper, and the bottom of the connecting plate surface is located outside the notch A. The bolts are tightened. Built-in recycling bin.

As an automatic powder spreading device of the present invention, preferably, both sides of the inner wall of the slot A of the connecting plate are inwardly sloping closed design, and extend into the recovery bin.

As an automatic powder spreading device of the present invention, preferably, the side of the powder dropping bin away from the powder spreading frame is designed with an inclined surface, and the inclined surface extends downward and overlaps with the discharging port of the powder dropping bin.

As an automatic powder spreading device of the present invention, preferably, a motor A is fixedly installed on the surface side of the powder spreading frame, and the output shaft of the motor A penetrates into the powder spreading frame and is fixedly connected with a powder spreading roller, The other end of the powder spreading roller is rotatably connected with the inner wall of the powder spreading frame.

As an automatic powder spreading device of the present invention, preferably, the surface of the output shaft of the motor A inserted into the powder spreading rack is sleeved with a bearing end cover, and the bearing end cover is bolted to the inner wall of the powder spreading rack. The surface of the output shaft of the motor A is located on one side of the bearing end cover and is sequentially sleeved with a deep groove ball bearing and a circlip, and the surface of the circlip is in conflict with the deep groove ball bearing.

As an automatic powder spreading device of the present invention, preferably, a washer is provided at the mounting hole on the surface of the bearing end cover, and the surface of the washer is closely fitted with the bolt in the mounting hole of the bearing end cover.

As an automatic powder spreading device of the present invention, a bottom plate is welded between the support frames, a stepping motor is fastened with bolts at the center of the surface of the bottom plate, and the output shaft of the stepping motor penetrates the bottom plate and is fixed A coupling B is connected, and the outer casing of the coupling B is provided with a casing, the casing is bolted on the surface of the bottom plate, and the side of the coupling B away from the bottom plate is fixed with balls The screw nut pair B, the surface of the ball screw nut pair B is welded with connecting rods on both sides of the surface of the sliding seat, and the forming table is fastened through the connecting rod bolts, and the surface of the ball screw nut pair B is B. A polished rod is inserted outside the connecting rod, and two ends of the polished rod are respectively fixedly connected with the connecting plate and the surface of the bottom plate.

As an automatic powder spreading device of the present invention, the polished rod is arranged symmetrically at four corners, and the polished rod is inserted into the hole provided on the surface of the sliding seat of the ball screw nut pair B and slides with the inner wall of the hole connect.

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

By setting the motor B, after placing the powder-spreading component on the surface of the connecting plate, the motor B drives the ball screw and nut pair A to rotate during operation. At this time, by adding powder to the powder bin, the moving support frame The powder spreading operation can be performed on the components passing along the way, so that the powder spreading can be ensured completely while moving the powder spreading.

By setting the motor A, the motor A can drive the powder spreading roller to rotate during operation, and the rotating powder spreading roller can squeeze the powder along the way, so as to compact and flatten the powder and the particles in the powder. , to avoid powder loosening. Compared with scraper spreading powder, the powder spreading roller has a flat surface and is not easy to be damaged due to its barrel-shaped structure, and the powder spreading effect is better than that of scraper spreading powder.

By setting the stepper motor, the component to be powdered is placed on the surface of the molding table. When the stepper motor operates, the connecting rod drives the component to move out of the slot B through the molding table, so as to assist people in conveying the component, and after the powder is spread on the component. Assisted removal.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of the side view of the present invention;

3 is a schematic structural view of the present invention;

Fig. 4 is the structural representation between the connecting plate and the bottom plate in the present invention;

Fig. 5 is the structural representation between the forming table and the bottom plate in the present invention;

6 is a schematic structural diagram of a connecting plate in the present invention;

7 is a schematic diagram of the overall structure of the ball screw nut pair in the present invention;

Fig. 8 is the sectional view of A-A in Fig. 7;

Fig. 9 is the side view structure schematic diagram of the ball screw nut pair in the present invention;

Fig. 10 is the structural representation of the powder drop bin in the present invention;

Figure 11 is a cross-sectional view of the powder bin B-B in the present invention;

Fig. 12 is the structural schematic diagram of the top view of the powder silo in the present invention;

In the picture:

1. Foot; 3. Supporting frame; 4. Stepping motor; 5. Motor A; 6. Motor B; 8. Recycling bin; 9. Connecting piece; 10. Guide rail; 11. Ball screw nut pair A; Forming table; 13, powder bin; 14, powder spreader; 16, coupling A; 17, support; 18, bearing end cover; 19, gasket; 20, deep groove ball bearing; 21, circlip; 22 23, connecting plate; 24, polished rod; 25, connecting rod; 26, ball screw nut pair B; 27, shell cover; 28, coupling B; 29, bottom plate; 30, thrust bearing.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

See Figure 1-12;

An automatic powder spreading device includes a connecting plate 23 , a support frame 3 symmetrically arranged at the four corners of the bottom surface of the connecting plate 23 , and a foot 1 bolted on the side of the support frame 3 away from the connecting plate 23 .

In this embodiment, the support frame 3 is used to support the connecting plate 23, the feet 1 are used to perform anti-skid treatment on the support frame 3, and the powder-spreading component is placed on the surface of the connecting plate 23, and the powder-spreading operation is performed by a scraper.

The automatic powder spreading device also includes a guide rail 10 bolted on the surface of the connecting plate 23. The surface of the guide rail 10 is slidably connected to a powder spreading rack 14, and the powder spreading bin 13 is welded on one side of the surface of the powder spreading rack 14. The surface of the connecting plate 23 The connecting piece 9 and the supporting piece 17 are respectively bolted on both sides. The surface of the connecting plate 23 is located on both sides of the guide rail 10 with a ball screw nut pair A11. The two ends of the ball screw nut pair A11 are respectively connected with the connecting piece 9 and the supporting piece. Part 17 is rotatably connected, and a thrust bearing 30 is fastened with bolts at the position of the surface of the connecting part 9 corresponding to the ball screw nut pair A11. The thrust bearing 30 is sleeved outside the ball screw nut pair A11 and is rotatably connected with the ball screw nut pair A11 , the surface of the sliding seat screwed on the surface of the ball screw nut pair A11 is fixedly connected to the surface of the powder spreading rack 14, and the surface of the support 17 is fixedly installed at the position of the ball screw nut pair A11. The motor B6 is fixedly installed, and the output of the motor B6 The shaft penetrates the surface of the support 17 and is fixedly provided with a coupling A16, and is fixedly connected to one end of the ball screw nut pair A11 through the coupling A16.

In this embodiment: in combination with the above, after placing the powder spreading member on the surface of the connecting plate 23, the motor B6 drives the ball screw nut pair A11 to rotate during operation, and the sliding seat of the ball screw nut pair A11 drives the powder spreading rack 14 Moving along the guide rail 10, at this time, by adding powder to the powder drop bin 13, the moving support frame 3 can perform powder spreading on the components passing along the way, so as to realize the moving powder spreading and ensure the powder spreading completely. .

It should be noted that: the motor A5 is powered by an external power source, and the motor A5 can drive the powder spreading rack 14 to perform repeated movements through the forward and reverse rotation of the output shaft.

In an optional embodiment, the guide rails 10 are symmetrically arranged and distributed on both sides of the extension of the connecting plate 23 , and are fastened to the surface of the powder spreading rack 14 by bolts sliding on the surface of the guide rail 10 .

In this embodiment, the guide rail 10 can limit the moving powder spreading rack 14 through the sliding sleeve, so as to ensure the smooth movement of the powder spreading rack 14 .

In an optional embodiment, the surface of the connecting plate 23 is located on one side of the powder drop bin 13 with a slot A and a slot B in turn.

In this embodiment, the notch A can collect the powder falling on the surface of the connecting plate 23 in a centralized manner, and introduce the collected powder into the recovery bin 8 .

In an optional embodiment, both sides of the inner wall of the slot A of the connecting plate 23 are inwardly sloping closed-end designs, and extend toward the recovery bin 8 .

In this embodiment, the closing design of the slot A can guide the powder entering into the slot A, thereby assisting people to collect the powder into the recovery bin 8 .

In an optional embodiment, the side of the powder dropping bin 13 away from the powder spreading rack 14 is designed as an inclined surface, and the inclined surface extends downward and coincides with the discharging port of the powder dropping bin 13 .

In the present embodiment: this design can drain the powder placed in the powder drop bin 13 to ensure smooth powder flow, and the powder drop bin 13 discharge opening can prevent excessive powder discharge because the opening is smaller than the feed opening.

Going further:

In an optional embodiment, a motor A5 is fixedly installed on the surface side of the powder spreading frame 14, and the output shaft of the motor A5 penetrates into the powder spreading frame 14 and is fixedly connected with the powder spreading roller 22, and the other side of the powder spreading roller 22 is fixedly connected. One end is rotatably connected with the inner wall of the powder spreading rack 14 .

In this embodiment, the motor A5 can drive the powder spreading roller 22 to rotate during operation. In combination with the above, the rotating powder spreading roller 22 can squeeze the powder along the way, so as to disperse the powder and the particles in the powder. Compact and flatten to avoid loose powder.

It should be noted that: the motor A5 is provided with an external power supply, and the output shaft of the motor A5 can drive the powder spreading roller 22 to rotate in the forward and reverse directions through forward and reverse rotation.

It should be noted that, compared with the powder spreading by the scraper, the powder spreading roller 22 has a flat surface and is not easily damaged due to the barrel-shaped structure, and the powder spreading effect is better than that of the scraper spreading.

In an optional embodiment, the surface of the output shaft of the motor A5 inserted into the powder spreading frame 14 is sleeved with a bearing end cover 18, the bearing end cover 18 is bolted to the inner wall of the powder spreading frame 14, and the output shaft surface of the motor A5 is located at the inner wall of the powder spreading frame 14. A deep groove ball bearing 20 and a circlip 21 are sequentially sleeved on one side of the bearing end cover 18 , and the surface of the circlip 21 collides with the deep groove ball bearing 20 .

In this embodiment: this design is to enhance the connection strength with the powder spreading roller 22 and the stability during the rotation of the powder spreading roller 22 .

In an optional embodiment, a washer 19 is provided at the mounting hole on the surface of the bearing end cover 18 , and the surface of the washer 19 is in close contact with the bolt in the mounting hole of the bearing end cover 18 .

In this embodiment: this design is used to increase the connection strength between the bearing end cover 18 and the bolt member, increase the frictional force, and prevent the bolt member from slipping and loosening.

Going a step further:

See Figure 1-5;

In combination with the above content: on this basis, a bottom plate 29 is welded between the support frames 3, a stepping motor 4 is fastened with bolts at the center of the surface of the bottom plate 29, and the output shaft of the stepping motor 4 penetrates the bottom plate 29 and is fixedly connected with a coupling B28, the outer casing of the coupling B28 is provided with a casing 27, the casing 27 is fastened to the surface of the bottom plate 29 with bolts, and the side of the coupling B28 away from the bottom plate 29 is fixed with a ball screw nut pair B26, a ball screw nut pair Connecting rods 25 are welded on both sides of the surface of the sliding seat screwed on the surface of B26, and the forming table 12 is fastened by bolts of the connecting rods 25. The surface of the ball screw nut pair B26 is located outside the connecting rod 25. Both ends are fixedly connected to the surface of the connecting plate 23 and the bottom plate 29 respectively.

In an optional embodiment, the polished rods 24 are arranged symmetrically at four corners, and the polished rods 24 are inserted into the sockets provided on the surface of the sliding seat of the ball screw nut pair B26 and are slidably connected to the inner wall of the sockets.

In this embodiment, the powder-spreading component is placed on the surface of the forming table 12, and when the stepping motor 4 operates, the output shaft of the stepping motor 4 drives the ball screw nut pair B26 to rotate, and the sliding seat of the ball screw nut pair B26 rotates along the When the polishing rod 24 pushes the connecting rod 25 to move, the connecting rod 25 drives the component to move out of the slot B through the forming table 12, so as to assist people in conveying the component and assisting in taking out the component after powder spreading.

It should be noted that: since the component is placed on the forming table 12, the component is still on the forming table 12 without moving the component, so that the moving support frame 3 can easily dust the component, and it can be regarded as a When the moulding table 12 is moved into the slot B of the connecting plate 23, the moulding table 12 is abutted with the inner wall of the slot B to achieve sealing and avoid powder spillage.

Finally, it should be noted that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. An automatic powder spreading device, comprising a connecting plate (23), a support frame (3) installed symmetrically at the four corners of the bottom surface of the connecting plate (23), and bolts are fastened on the support frame (3) away from The foot (1) on one side of the connecting plate (23) is characterized in that it further comprises a guide rail (10) fastened by bolts on the surface of the connecting plate (23). A powder rack (14), a powder drop bin (13) is welded on one side of the surface of the powder spreading rack (14), and a connecting piece (9) and a supporting piece are respectively bolted on both sides of the surface of the connecting plate (23) (17), the surface of the connecting plate (23) is provided with a ball screw nut pair A (11) on both sides of the guide rail (10), and the two ends of the ball screw nut pair A (11) are respectively connected to The connecting piece (9) and the supporting piece (17) are rotatably connected, and a thrust bearing (30) is fastened with bolts at the position of the surface of the connecting piece (9) corresponding to the ball screw nut pair A (11). , the thrust bearing (30) is sleeved outside the ball screw nut pair A (11) and is rotatably connected with the ball screw nut pair A (11), the ball screw nut pair A (11) One side of the surface of the sliding seat screwed on the surface is fixedly connected to the surface of the powder spreading frame (14), and a motor is fixedly installed on the surface of the support member (17) corresponding to the position of the ball screw nut pair A (11). B(6), the output shaft of the motor B(6) penetrates the surface of the support member (17) and is fixedly provided with a coupling A(16), and through the coupling A(16) and the One end of the ball screw nut pair A (11) is fixedly connected. 2. The automatic powder spreading device according to claim 1, characterized in that: the guide rails (10) are symmetrically arranged and distributed on both sides of the extension of the connecting plate (23), and are slid on the guide rails (10). ) The sliding sleeve on the surface is fastened with bolts on the surface of the powder spreading frame (14). 3. The automatic powder spreading device according to claim 1, wherein the surface of the connecting plate (23) is located on one side of the powder dropping bin (13) and is provided with a slot A and a slot B in turn, so The bottom of the surface of the connecting plate (23) is located outside the slot A, and a recovery bin (8) is fastened with bolts. 4. The automatic powder spreading device according to claim 3, characterized in that: both sides of the inner wall of the slot A of the connecting plate (23) are inwardly inclined closed-mouth design, and are directed toward the recovery bin (8) extension within. 5. The automatic powder spreading device according to claim 1, characterized in that: the side of the powder dropping bin (13) away from the powder spreading rack (14) is an inclined surface design, and is incompatible with the powder dropping bin (14). 13) The feeding openings are coincident. 6. The automatic powder spreading device according to claim 1, characterized in that: a motor A (5) is fixedly installed on the surface side of the powder spreading frame (14), and the output shaft of the motor A (5) penetrates through A powder spreading roller (22) is fixedly connected to the powder spreading rack (14), and the other end of the powder spreading roller (22) is rotatably connected with the inner wall of the powder spreading rack (14). 7. The automatic powder spreading device according to claim 6, characterized in that: the surface of the output shaft of the motor A (5) inserted into the powder spreading frame (14) is sleeved with a bearing end cover (18), so The bearing end cover (18) is bolted to the inner wall of the powder spreading frame (14), and the surface of the output shaft of the motor A (5) is located on one side of the bearing end cover (18) and is sequentially sleeved with deep grooves A ball bearing (20) and a circlip (21), the surface of the circlip (21) collides with the deep groove ball bearing (20). 8 . The automatic powder spreading device according to claim 7 , wherein a washer ( 19 ) is provided at the mounting hole on the surface of the bearing end cover ( 18 ), and the surface of the washer ( 19 ) is in contact with the bearing. 9 . The bolts in the mounting holes of the end cover (18) fit tightly. 9 . The automatic powder spreading device according to claim 1 , wherein a bottom plate ( 29 ) is welded between the support frames ( 3 ), and the center of the surface of the bottom plate ( 29 ) is fastened with a stepping bolt. 10 . a motor (4), the output shaft of the stepping motor (4) penetrates the bottom plate (29) and is fixedly connected with a coupling B (28), the coupling B (28) is provided with a casing (27) ), the cover (27) is bolted on the surface of the bottom plate (29), and the side of the coupling B (28) away from the bottom plate (29) is fixed with a ball screw nut pair B (26), a connecting rod (25) is welded on both sides of the surface of the sliding seat screwed on the surface of the ball screw nut pair B (26), and a forming table (12) is bolted through the connecting rod (25) , the surface of the ball screw nut pair B (26) is located outside the connecting rod (25) and a polished rod (24) is inserted, and the two ends of the polished rod (24) are respectively connected with the connecting plate (23) and the The surface of the bottom plate (29) is fixedly connected. 10. The automatic powder spreading device according to claim 9, wherein the polished rod (24) is arranged symmetrically at four corners, and the polished rod (24) is inserted into the ball screw nut pair B (26) The socket is opened on the surface of the sliding seat and is slidably connected with the inner wall of the socket.

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