CN218341012U

CN218341012U - Large-size workpiece for selective laser sintering

Info

Publication number: CN218341012U
Application number: CN202222558244.4U
Authority: CN
Inventors: 包业; 李庚�
Original assignee: Hunan Farsoon High Tech Co Ltd
Current assignee: Hunan Farsoon High Tech Co Ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-01-20
Anticipated expiration: 2032-09-27

Abstract

A large-size workpiece for selective laser sintering comprises a plurality of sub-workpieces which are obtained by splitting the large-size workpiece and are printed through selective laser sintering, and at least one edge of each sub-workpiece is provided with a plurality of staggered dovetail grooves and dovetail blocks along a straight line, so that adjacent sub-workpieces are spliced through the matched dovetail grooves and dovetail blocks. The utility model discloses a jumbo size work piece for selectivity laser sintering has reduced the shaping size requirement to equipment on the one hand, on the other hand, the node between each sub-work piece is identical with the tenon fourth of the twelve earthly branches structure of dovetail and forked tail piece, the tenon fourth of the twelve earthly branches of dovetail groove is used properly, just can tight lock between the sub-work piece, reach "the seamless degree of clothes all over", can combine mutually between the sub-work piece, support mutually, constitute and be rich in elastic frame construction, not only can bear great load, and allow to produce certain deformation, the mechanical strength and the wholeness of work piece can obtain fine guarantee.

Description

Large-size workpiece for selective laser sintering

Technical Field

The utility model belongs to the technical field of the vibration material disk, concretely relates to jumbo size work piece for selectivity laser sintering.

Background

The additive manufacturing technology is an advanced manufacturing technology with the distinct characteristics of digital manufacturing, high flexibility and adaptability, direct CAD model driving, high speed, rich and various material types and the like, and has a very wide application range because the additive manufacturing technology is not limited by the complexity of the shape of a part and does not need any tool die. Selective Laser Melting (SLM) is one of the rapidly developed additive manufacturing technologies in recent years, and it uses powder material as raw material and adopts Laser to scan the cross section of a three-dimensional entity layer by layer to complete prototype manufacturing. The basic working process is as follows: the powder feeding device feeds a certain amount of powder to the surface of the working platform, the powder paving device flatly paves a layer of powder material on the bottom plate of the forming cylinder or the upper surface of the formed part, and the laser galvanometer system controls laser to scan the powder layer of the solid part according to the cross section outline of the layer with approximately unchanged spot size and beam energy, so that the powder is melted and bonded with the formed part below; after one layer of cross section is sintered, the working platform is lowered by one layer, the powder spreading device is used for spreading a layer of uniform and compact powder on the working platform, scanning sintering is carried out on a new layer of cross section, and scanning and stacking are carried out on a plurality of layers until the whole prototype manufacturing is completed.

With the rapid development of additive manufacturing technology, the types of printed workpieces are more and more, and the sizes of the workpieces are also larger and larger. However, for large-sized workpieces, such as automobile bumpers, instrument console cover plates, automobile door shells, aerospace, unmanned aerial vehicles, airplane models and the like, the size of the workpieces is limited by the restriction of the forming size range of the cylinder body of the equipment, and at present, only the cylinder body with the larger forming size can be selected for printing the workpieces, so that the requirements on the size of printer equipment are higher, and the manufacturing cost is increased. And since the molding size of the printer cannot be increased all the time, printing of a large-sized workpiece is limited. In order to overcome the technical problem, the large-size workpiece is split into the small workpieces for printing at present, but the spliced workpiece has the defect of poor mechanical strength.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem existing in the prior art, the utility model provides a jumbo size work piece for selectivity laser sintering, this jumbo size work piece has not only reduced the shaping size requirement to equipment, has guaranteed the mechanical strength and the wholeness ability of work piece moreover.

In order to solve the technical problem, the utility model provides a jumbo size work piece for selectivity laser sintering, obtain by jumbo size work piece split including a plurality of, and all through the sub-work piece that selectivity laser sintering printed, at least an edge of each sub-work piece is provided with the crisscross dovetail and the dovetail piece that sets up of a plurality of along the straight line to make adjacent sub-work piece realize the concatenation through assorted dovetail and dovetail piece.

As a further preferred scheme of the utility model, the dovetail includes long limit and is located the first hypotenuse and the second hypotenuse of long limit both sides, the length of first hypotenuse and second hypotenuse equals.

As a further preferred scheme of the utility model, the one end on first hypotenuse and the one end on long limit to and the one end on second hypotenuse all forms 45 degrees first contained angles with the other end on long limit.

As a further preferred scheme of the utility model, the other end of first hypotenuse and the protruding long limit of adjacent forked tail piece, and the other end of second hypotenuse all forms 45 degrees second contained angles with the protruding long limit of adjacent.

As a further preferred scheme of the utility model, first contained angle and second contained angle pass through the chamfer and form the fillet.

As a further preferable scheme of the utility model, the length of the long edge is 10-30mm.

As a further preferable aspect of the present invention, the length of the long side is 20mm.

As a further preferred aspect of the present invention, the plurality of sub-workpieces are printed simultaneously by different selective laser sintering apparatuses, respectively.

As a further preferred scheme of the utility model the concatenation department of dovetail and forked tail piece adopts glue to bond.

The utility model discloses a jumbo size work piece for selectivity laser sintering obtains by jumbo size work piece split through including a plurality of, and all through the sub-work piece that selectivity laser sintering printed, and an at least edge of each sub-work piece is provided with dovetail and the dovetail piece that a plurality of was crisscross to be set up along the straight line to make adjacent sub-work piece pass through assorted dovetail and dovetail piece and realize the concatenation. Make the utility model discloses a jumbo size work piece for selective laser sintering has reduced the shaping size requirement to equipment on the one hand, on the other hand, the node between each sub-work piece is identical with the tenon fourth of the twelve earthly branches structure of dovetail and forked tail piece, the tenon fourth of the twelve earthly branches of dovetail is suitable for use, just can tight lock between the sub-work piece, reach "the seamless degree of sky clothing", can combine mutually between the sub-work piece, support mutually, constitute and be rich in elastic frame construction, not only can bear great load, and allow to produce certain deformation, the mechanical strength and the wholeness of work piece can obtain fine guarantee.

Drawings

FIG. 1 is a schematic view of a portion of one embodiment of the present invention for providing a large-sized workpiece for selective laser sintering;

fig. 2 is a schematic structural diagram of a dovetail groove according to an embodiment of the present invention provided for a large-sized workpiece for selective laser sintering.

The components in the figure are labeled as follows:

1. dovetail groove, 11, long edge, 12, first hypotenuse, 13, second hypotenuse, 14, first contained angle, 15, second contained angle, 2, forked tail piece, 21, protruding long edge, 3, sub-workpiece.

Detailed Description

In order to make the technical solution of the present invention better understood and realized by those skilled in the art, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the large-size workpiece for selective laser sintering provided in this embodiment includes a plurality of sub-workpieces 3 obtained by splitting the large-size workpiece and printed by selective laser sintering, and at least one edge of each sub-workpiece 3 is provided with a plurality of dovetail grooves 1 and dovetail blocks 2 arranged in a staggered manner along a straight line, so that adjacent sub-workpieces 3 are spliced by the dovetail grooves 1 and the dovetail blocks 2 matched with each other. Therefore, the requirement on the forming size of equipment is reduced, and the joints between the sub-workpieces 3 are matched in the mortise and tenon structure of the dovetail groove 1 and the dovetail block 2, and the mortise and tenon are properly used, so that the structures of the adjacent sub-workpieces 3 can be tightly buckled to form an elastic frame structure; in addition, the structure enables splicing to be simple, convenient and quick, and ensures the mechanical strength and integrity of workpieces.

Preferably, as shown in fig. 2, the dovetail groove 1 includes a long side 11 and a first oblique side 12 and a second oblique side 13 located on both sides of the long side 11, and the first oblique side 12 and the second oblique side 13 have equal lengths. The dovetail groove 1 and the corresponding dovetail block 2 not only ensure the splicing stability, but also have more beautiful integral structure.

Further preferably, one end of the first oblique side 12 and one end of the long side 11, and one end of the second oblique side 13 and the other end of the long side 11 form a first included angle 14 of 45 degrees. The other end of the first bevel edge 12 and the long edge 21 of the adjacent dovetail block 2, and the other end of the second bevel edge 13 and the long edge 21 of the adjacent dovetail block form a second included angle 15 of 45 degrees; this makes it easier to splice the dovetail slot 1 and the corresponding dovetail block 2.

As a preferred scheme of the utility model, first contained angle 14 and second contained angle 15 form the fillet through the chamfer, can avoid printing the in-process such as clear powder, sandblast, polishing, concatenation after accomplishing at the work piece and cause destruction to forked tail department closed angle like this to the printing quality of work piece has further been guaranteed.

It should be noted that the size of the dovetail groove 1 can be determined by considering the size of the workpiece to be printed and the size of the sub-workpiece 3, and it can also be determined by the specific requirements of the designer, preferably, the length of the long side 11 is 10-30mm, and further preferably, the length of the long side 11 is 20mm.

Preferably, the sub-workpieces 3 are printed in the same batch by using the same selective laser sintering equipment, and the sub-workpieces 3 are printed by using the same material and sintering printing process parameters, so that the printed sub-workpieces 3 have higher consistency and better compatibility. Further preferably, the sub-components with different sizes can be divided according to the workpiece to be printed in a reasonable placing mode, so that the consumption of raw materials in the working cavity of the selective sintering equipment is less, and the printing time is faster.

As another preferred scheme of the utility model, a plurality of sub-work pieces 3 print simultaneously through the selectivity laser sintering equipment of difference respectively, can save the printing time of work piece like this greatly, have improved printing efficiency promptly.

In order to make the joint of the adjacent sub-workpieces 3 more firm, glue, for example 502 glue, is used for bonding at the joint of the dovetail groove 1 and the dovetail block 2.

It should be noted that, in this embodiment, only the splicing of the two adjacent sub-workpieces 3 is described, and the splicing of the other adjacent sub-workpieces 3 is not described, but it should be noted that the structure of the above embodiment is referred to between the other adjacent sub-workpieces 3, and therefore, the description is not repeated here.

The above embodiment is only the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above embodiment, all belong to the technical scheme of the present invention under the thought should belong to the protection scope of the present invention. It should be noted that a number of modifications and alterations without departing from the principles of the invention are deemed to be within the scope of the invention.

Claims

1. A large-size workpiece for selective laser sintering is characterized by comprising a plurality of sub-workpieces which are obtained by splitting the large-size workpiece and are printed by selective laser sintering, wherein at least one edge of each sub-workpiece is provided with a plurality of staggered dovetail grooves and dovetail blocks along a straight line, so that adjacent sub-workpieces are spliced through the matched dovetail grooves and dovetail blocks.

2. A large-size workpiece according to claim 1, wherein the dovetail groove comprises a long side and a first bevel edge and a second bevel edge on both sides of the long side, and the first bevel edge and the second bevel edge are equal in length.

3. A large-size workpiece according to claim 2, characterised in that one end of the first oblique side forms a first angle of 45 degrees with one end of the long side and one end of the second oblique side forms a first angle with the other end of the long side.

4. A large-size workpiece according to claim 3, characterised in that the other end of the first sloping side forms a second angle of 45 degrees with the long side of the boss of the adjacent dovetail block and the other end of the second sloping side forms a second angle with the long side of the boss of the adjacent dovetail block.

5. A large-size workpiece according to claim 4, characterised in that the first and second included angles are rounded by chamfering.

6. A large-size workpiece for selective laser sintering as claimed in claim 2 characterised in that the length of the long side is 10-30mm.

7. Large-sized workpiece for selective laser sintering according to claim 6, characterised in that the length of the long side is 20mm.

8. The large-sized workpiece for selective laser sintering according to any one of claims 1 to 7, wherein the plurality of sub-workpieces are each simultaneously printed by different selective laser sintering apparatuses.

9. A large-size workpiece for selective laser sintering according to any one of claims 1 to 7, characterized in that glue is used for bonding at the joints of the dovetail grooves and the dovetail blocks.