CN216708363U - Self-compaction powder laying assembly and laser rapid forming device - Google Patents
Self-compaction powder laying assembly and laser rapid forming device Download PDFInfo
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- CN216708363U CN216708363U CN202220949671.2U CN202220949671U CN216708363U CN 216708363 U CN216708363 U CN 216708363U CN 202220949671 U CN202220949671 U CN 202220949671U CN 216708363 U CN216708363 U CN 216708363U
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Abstract
The utility model provides a self-compacting powder laying assembly and a laser rapid forming device, and belongs to the technical field of laser rapid forming devices. The self-compacting powder laying assembly provided by the utility model can effectively compress the powder layer laid on the powder laying carrier plate by rolling of the rolling member in the powder laying process of the annular cutting edge, so that the powder layer with a particularly smooth and compact sintering surface is formed, and the self-compacting powder laying assembly is beneficial to processing a smooth and compact solid by a laser rapid forming device.
Description
Technical Field
The utility model belongs to the technical field of laser rapid forming devices, and particularly relates to a self-compacting powder laying assembly and a laser rapid forming device.
Background
Laser Rapid Prototyping (LRP) is a brand new manufacturing technology that integrates advanced technologies such as CAD, CAM, CNC, Laser, precision servo drive, and new materials. Compared with the traditional manufacturing method, the laser rapid prototyping technology has the advantages of high copying performance and interchangeability of the prototype, no relation between the manufacturing process and the geometric shape of the manufactured prototype, short processing period, low cost and the like.
The principle of the laser rapid prototyping technology is that a three-dimensional solid model is generated by computer software, then the three-dimensional solid model is layered by layering software, a laser beam is controlled to scan powder in a region to be modeled through two-dimensional data drive of the section of each thin layer, the powder is rapidly melted under the action of high-energy laser, and then the powder is rapidly solidified after heat dissipation and cooling, so that the thin layers with required shapes are processed and are accumulated layer by layer to form the solid model.
The key indexes of the laser rapid forming product mainly comprise density, precision and surface roughness, and the powder laying quality has very important influence on the density and the surface roughness. Therefore, the powder laying assembly is a core component of the whole laser rapid prototyping device. But the powder paving plane that the powder paving subassembly produced in the current laser rapid prototyping has unevenness's problem.
Disclosure of Invention
The utility model aims to solve the problem that the plane of a powder layer paved by a powder paving component in the existing laser rapid prototyping is uneven, and provides and designs a self-pressing powder paving component and a laser rapid prototyping device to solve the problem and form a powder layer with a particularly smooth and compact sintering surface, so that the laser rapid prototyping device is beneficial to processing a smooth and compact entity.
In order to achieve the above object, in one aspect, the present invention provides a self-compacting powder spreading assembly, which includes an annular frame, an annular blade is disposed at a lower end of the annular frame, a grid plate is disposed in the annular frame, a rolling member is rotatably mounted in a grid hole of the grid plate, and a lowest point of the rolling member may be flush with a lower end of the annular blade, or the lowest point of the rolling member may be lower than the lower end of the annular blade. Therefore, when the self-pressing powder laying assembly provided by the utility model is used for laying powder, the self-pressing powder laying assembly can perform powder scraping action and powder laying action through the annular cutting edge at the lower end of the annular frame, meanwhile, in the moving process of the annular frame, the rolling parts in the grid holes can roll under the action of friction force, and the powder layer laid on the powder laying carrier plate is compacted in the vertical direction through the rolling of the rolling parts, so that the powder layer with a particularly smooth and compact sintering surface is formed, and the self-pressing powder laying assembly is beneficial to a laser rapid prototyping device to process a smooth and compact entity.
Further, the outer surface of the rolling member is provided with an anti-adhesive coating, and the adhesion of powder particles to the rolling member and the resultant deformation of the processed body are prevented by the anti-adhesive coating.
Further, the rolling members are ball rolling members, and preferably ball rolling members having a diameter of 0.1mm or more and less than 10 mm.
On the other hand, the utility model also provides a laser rapid forming device which comprises a rack, wherein a forming cylinder is arranged on the rack, a powder laying carrier plate is vertically and slidably connected in the forming cylinder, and the lower end of the powder laying carrier plate is in transmission connection with a forming driving assembly used for driving the powder laying carrier plate to move up and down; the powder feeding device is characterized in that the rack is also provided with a powder feeding cylinder, a powder feeding plate is vertically and slidably connected in the powder feeding cylinder, and the lower end of the powder feeding plate is in transmission connection with a powder feeding driving assembly used for driving the powder feeding plate to move up and down; still include the aforesaid from compressing tightly spread the powder subassembly, from compressing tightly spread the annular frame of powder subassembly on the transmission be connected with spread powder drive assembly, spread powder drive assembly and can drive annular frame and remove to the shaping jar top from sending powder jar top, and this device can realize sending powder, strickleing and spread the powder action through the removal of annular frame between sending powder jar and shaping jar.
The device further comprises a displacement sensor, wherein the displacement sensor is used for measuring the distance between the powder laying carrier plate and the annular cutting edge or the distance between the upper surface of powder laid on the powder laying carrier plate and the annular cutting edge; the last communication connection of displacement sensor has height adjustment controller, height adjustment controller can control the height that powder support plate was spread in shaping drive assembly adjustment according to displacement sensor's output signal. Therefore, when the powder laying carrier plate descends a certain distance H along the forming cylinder under the driving of the forming driving assembly, so that the vertical distance H is theoretically reserved between the upper surface of the powder laying carrier plate and the annular cutting edge, the annular frame and the annular cutting edge can be firstly rotated to the position above the powder laying carrier plate, then the actual value of the vertical distance H at the moment is tested through the displacement sensor, and the error value between the actual value and the theoretical value is fed back to an upper industrial personal computer, so that the distance is finely adjusted, the final theoretical vertical distance H is ensured to be equal to H, and the vertical distance H is the preset single-layer thickness of the powder laying layer.
Furthermore, a laser scanning assembly is arranged above the powder laying carrier plate, so that after the self-compacting powder laying assembly sends powder onto the powder laying carrier plate, a laser beam can be guided to the powder laying carrier plate through the laser scanning assembly, and the laser beam can uniformly sinter the surface of the powder layer in a pulse mode or a continuous mode through an external acoustic-optical modulator, so that a very uniform sintered layer is generated, and the laser power of each sintered layer can be increased or the working mode can be changed according to the target requirement, so that the gradient distribution of the horizontal characteristic and the vertical characteristic of the generated entity can be adjusted.
Further, still include the protective gas treatment chamber, frame, shaping jar, send whitewashed jar, from pressing shop's powder subassembly all are located the protective gas treatment chamber, and before processing begins with protective gas treatment chamber inside take out to the vacuum earlier, again to the interior technological protective gas that dashes of protective gas treatment chamber.
According to the technical scheme, the utility model has the following advantages: firstly, the self-compacting powder laying assembly provided by the utility model can effectively compress a powder layer laid on a powder laying carrier plate by rolling of a rolling member in the powder laying process of the annular cutting edge, namely in the moving process of the annular frame, so that the powder layer with a particularly smooth and compact sintering surface is formed, and a smooth and compact solid body can be processed by a laser rapid prototyping device; secondly, the utility model has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a self-compacting dusting assembly according to the present invention.
Fig. 2 is a schematic structural diagram of a laser rapid prototyping apparatus in accordance with the present invention.
In the figure: 1. the device comprises a forming entity, 2, a powder laying carrier plate, 3, powder, 4, a forming cylinder, 5, a powder feeding cylinder, 6, a self-pressing powder laying component, 7, a laser scanning component, 8, a network grid plate, 9, a rolling part, 10, a powder feeding plate, 11 and an annular frame.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a self-compacting dusting assembly 6, which comprises an annular frame 11, wherein the lower end of the annular frame 11 is provided with an annular blade, a grid plate 8 is arranged in the annular frame 11, a rolling member 9 made of a high-density material is rotatably mounted in a grid hole of the grid plate 8, and the lowest point of the rolling member 9 can be flush with the lower end of the annular blade, or the lowest point of the rolling member 9 can be lower than the lower end of the annular blade. Thus, during the movement of the ring-shaped frame 11, the rolling members 9 can roll under the action of friction force, and the powder layer laid on the powder laying carrier plate 2 is compacted in the vertical direction by the rolling of the rolling members 9, so that a powder layer with a particularly smooth and dense sintering surface is formed, and the processing of a smooth and dense solid body by the laser rapid prototyping device is facilitated. The rolling elements 9 can be either ball-shaped rolling elements or cylindrical rollers.
In addition, the present invention preferably further provides an anti-sticking coating on the outer surface of the rolling member 9, and prevents the rolling member 9 from sticking powder particles during rolling by the anti-sticking coating.
In addition, as shown in fig. 2, the utility model also provides a laser rapid prototyping device, which comprises a protective gas processing chamber, wherein a rack is arranged in the protective gas processing chamber, and a powder feeding cylinder 5 and a prototyping cylinder 4 are arranged on the rack. The powder feeding cylinder 5 is vertically and slidably connected with a powder feeding plate 10, and the lower end of the powder feeding plate 10 is in transmission connection with a powder feeding driving assembly used for driving the powder feeding plate 10 to move up and down; the powder laying carrier plate 2 is vertically and slidably connected in the forming cylinder 4, and the lower end of the powder laying carrier plate 2 is in transmission connection with a forming driving assembly used for driving the powder laying carrier plate 2 to move up and down; and a laser scanning assembly 7 is arranged above the forming cylinder 4, and the distance between the laser scanning assembly 7 and the powder laying carrier plate 2 is determined according to the fixed focal length of the laser scanning assembly 7.
Laser rapid prototyping device still includes the aforesaid and spreads powder subassembly 6 from compressing tightly, from compressing tightly the transmission connection has shop's powder drive assembly on the annular frame 11 of spreading powder subassembly 6, just spread powder drive assembly and can drive annular frame 11 and remove to shaping jar 4 top from powder feeding jar 5 top to realize sending the powder, strickleing and spreading the powder action through the removal of annular frame 11 between powder feeding jar 5 and shaping jar 4.
In addition, in order to improve the movement precision of the powder laying carrier plate 2, the utility model is also provided with a displacement sensor for measuring the distance between the powder laying carrier plate 2 and the annular cutting edge and/or the distance between the upper surface of the powder laid on the powder laying carrier plate 2 and the annular cutting edge, and the measurement precision of the displacement sensor is less than 1 μm. And the displacement sensor is connected with a height adjusting controller in a communication mode, the height adjusting controller can control the forming driving assembly to adjust the height of the powder laying carrier plate 2 according to the output signal of the displacement sensor, and finally the purpose of adjusting the distance between the powder laying carrier plate 2 and the annular cutting edge is achieved.
It should be noted that the number of the forming cylinder 4, the powder feeding cylinder 5 and the self-compacting powder laying assembly in the laser rapid forming device provided by the utility model can be one or more, and the specific number and the position relationship can be determined according to the specific production conditions.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The self-compaction powder laying assembly is characterized by comprising an annular frame, wherein an annular cutting edge is arranged at the lower end of the annular frame, a grid plate is arranged in the annular frame, a rolling piece is rotatably arranged in a grid hole of the grid plate, and the lowest point of the rolling piece can be flush with the lower end of the annular cutting edge or lower than the lower end of the annular cutting edge.
2. The self-compacting dusting assembly of claim 1 whereby the outer surface of the rolling member is provided with an anti-adhesive coating.
3. The self-compacting dusting assembly of claim 1 whereby the roller is a ball roller.
4. A laser rapid forming device is characterized by comprising a rack, wherein a forming cylinder is arranged on the rack, a powder laying carrier plate is vertically and slidably connected in the forming cylinder, and the lower end of the powder laying carrier plate is in transmission connection with a forming driving assembly used for driving the powder laying carrier plate to move up and down; the powder feeding device is characterized in that the rack is also provided with a powder feeding cylinder, a powder feeding plate is vertically and slidably connected in the powder feeding cylinder, and the lower end of the powder feeding plate is in transmission connection with a powder feeding driving assembly used for driving the powder feeding plate to move up and down; the self-compaction powder laying assembly of any one of claims 1 to 3, wherein a powder laying driving assembly is in transmission connection with the annular frame of the self-compaction powder laying assembly, and the powder laying driving assembly can drive the annular frame to move from the upper part of the powder feeding cylinder to the upper part of the forming cylinder.
5. The laser rapid prototyping device of claim 4 further comprising a displacement sensor for measuring the distance between the powder laying carrier plate and the annular blade or for measuring the distance between the upper surface of the powder laid on the powder laying carrier plate and the annular blade; the last communication connection of displacement sensor has height adjustment controller, height adjustment controller can control the height that powder support plate was spread in shaping drive assembly adjustment according to displacement sensor's output signal.
6. The laser rapid prototyping device of claim 4 wherein a laser scanning assembly is disposed above said powder laying carrier plate.
7. The laser rapid prototyping apparatus of claim 4 further comprising a shielding gas processing chamber, wherein said frame, said prototyping cylinder, said powder feeding cylinder, and said self-compacting powder laying assembly are all located within said shielding gas processing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220949671.2U CN216708363U (en) | 2022-04-24 | 2022-04-24 | Self-compaction powder laying assembly and laser rapid forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220949671.2U CN216708363U (en) | 2022-04-24 | 2022-04-24 | Self-compaction powder laying assembly and laser rapid forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216708363U true CN216708363U (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220949671.2U Active CN216708363U (en) | 2022-04-24 | 2022-04-24 | Self-compaction powder laying assembly and laser rapid forming device |
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| CN (1) | CN216708363U (en) |
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2022
- 2022-04-24 CN CN202220949671.2U patent/CN216708363U/en active Active
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