CN114682806A - Laser powder bed melting forming device based on rotary powder laying mechanism - Google Patents
Laser powder bed melting forming device based on rotary powder laying mechanism Download PDFInfo
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- CN114682806A CN114682806A CN202210277363.4A CN202210277363A CN114682806A CN 114682806 A CN114682806 A CN 114682806A CN 202210277363 A CN202210277363 A CN 202210277363A CN 114682806 A CN114682806 A CN 114682806A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/60—Planarisation devices; Compression devices
- B22F12/67—Blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/22—Driving means
- B22F12/222—Driving means for motion along a direction orthogonal to the plane of a layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/30—Platforms or substrates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/70—Gas flow means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Plasma & Fusion (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a laser powder bed melting forming device based on a rotary powder paving mechanism, which comprises a forming assembly, wherein the forming assembly comprises a cylindrical main body, the upper end of the cylindrical main body is provided with a forming groove and a powder groove, the forming groove and the powder groove are symmetrically arranged, a first piston is arranged in the forming groove, a second piston is arranged in the powder groove, and a partition plate is formed between the forming groove and the powder groove; the powder spreading assembly comprises a scraper arranged on the partition plate; the invention adopts the circumferential rotation powder spreading mode of matching the powder spreading mechanism directly driven by the driving motor and the quasi-cylindrical working cylinder body, thereby greatly reducing the powder spreading time and improving the forming efficiency while ensuring the uniform deposition of the powder. In addition, the powder spreading device is integrated with an air inlet and blowing function, and the blowing port array on the powder spreading device can always face the arc-shaped distributed flow guide and smoke exhaust device after the powder spreading device finishes powder spreading in the forming process, so that a high-efficiency and stable air flow passage is formed, and smoke and dust in the printing process are effectively removed.
Description
Technical Field
The invention relates to the technical field of 3D printing, in particular to a laser powder bed melting forming device based on a rotary powder laying mechanism.
Background
Additive Manufacturing (AM) technology, i.e., 3D printing technology, differs from the material reduction concept of conventional manufacturing technology and aims to achieve precision forming of three-dimensional components through mesoscopic scale lamination manufacturing. The american society for testing and materials defines additive manufacturing as "a material bonding process that transforms 3D model data into a three-dimensional solid by lamination, as opposed to subtractive manufacturing, also known as additive machining, additive process, additive technology, lamination manufacturing, layer manufacturing, and freeform manufacturing. The additive manufacturing technology has been developed rapidly for over 30 years since the last 80 years, especially for the last decade, and has become one of the leading edge and hot spots in the current mechanical engineering field. Metals or alloys are the most widely used structural materials in practical engineering, making metal additive manufacturing techniques uniquely important in the field of 3D printing. The metal additive manufacturing technology can be divided into a powder system and a wire system according to the original material form, and compared with the latter, the metal additive manufacturing based on the powder system has relatively higher cost, but the forming precision is obviously higher. The Laser powder bed melting technology (LPBF) based on the powder bed is mainly characterized by the fine powder layer thickness and the extremely fine beam spot size (the powder layer thickness can reach 20 mu m, and the beam spot size is less than 100 mu m), so that the LPBF based Laser powder bed melting technology is suitable for small-batch precision forming of complex metal components, particularly realizes direct and rapid forming manufacturing of complex structure original parts, special-shaped parts, tool dies and the like in the field of aerospace, and has clear application requirements and development prospects.
The LPBF forming system mainly comprises a laser, a light path system, a scanning galvanometer, a forming cavity, a powder laying system, a circulating gas path purification system, a computer control system and the like. When forming a sample based on LPBF, firstly, a three-dimensional model is required to be led into processing software to carry out a series of model processing before processing, wherein model position placing, support adding, processing parameter setting and the like are included, and then all three-dimensional models to be printed are dispersed into two-dimensional digital tracks through a software slicing function to form data packets to be led into an LPBF forming system; then, the preparation work before the processing of the forming cavity is carried out, wherein the preparation work comprises the steps of leveling and fixing the forming substrate, filling powder, sealing the cavity, starting a vacuum pump and protective gas and the like, and when the oxygen content in the forming cavity is reduced to a certain value (for example, below 200 ppm), the laser can be started to execute the printing task. In the LPBF forming process, a powder spreading arm or a roller uniformly deposits powder with a certain layer thickness on a substrate, and then a laser beam selectively melts local powder under the control of a computer according to slice information to form a two-dimensional plane; and (3) with the completion of the processing of one layer, descending the forming cylinder and ascending the powder cylinder, continuously repeating the processes by the laser beam based on the information of the next layer of slices until the final formation of the three-dimensional entity is completed.
However, the back-and-forth stroke of the powder spreading arm or roller in each layer forming period obviously reduces the forming efficiency of the component, and in order to improve the forming efficiency, the walking speed of the powder spreading arm or roller is generally increased, however, too fast walking speed often causes dust raising, and meanwhile, uneven deposition of the powder layer is easily formed. In addition, in the traditional LPBF forming system, due to the straight design of the air outlet guide plate, the movement paths of the smoke dust are relatively long, and the smoke dust is not beneficial to being discharged in time when the far end is formed; on the other hand, for the observation window, the observation window is generally perpendicular to the airflow moving path, and the design mode is not beneficial to the direct external observation of the interaction between the airflow and the splashes and the smoke by engineering/researchers.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and in this section as well as in the abstract and the title of the invention of this application some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above problems occurring in the prior art and/or the problems occurring in the prior art.
Therefore, the technical problem to be solved by the present invention is to provide a laser powder bed melting forming device based on a rotary powder spreading mechanism, so as to overcome the defects of the prior art, and significantly improve the forming efficiency and the forming quality when a complex customized component is formed.
In order to solve the technical problems, the invention provides the following technical scheme: a laser powder bed melting forming device based on a rotary powder laying mechanism comprises a forming assembly and a powder forming assembly, wherein the forming assembly comprises a cylindrical main body, the upper end of the cylindrical main body is provided with a forming groove and a powder groove, the forming groove and the powder groove are symmetrically arranged, a first piston is arranged in the forming groove, a second piston is arranged in the powder groove, and a partition plate is formed between the forming groove and the powder groove;
and the powder spreading assembly comprises a scraper arranged on the partition plate.
As a preferable scheme of the laser powder bed melting forming device based on the rotary powder laying mechanism of the invention, wherein: a first driving piece and a second driving piece are arranged in the cylindrical main body, the first driving piece is provided with a first piston rod, and the second driving piece is provided with a second piston rod; the first piston rod extends into the forming groove to be connected with the first piston, and the second piston rod extends into the powder groove to be connected with the second piston.
As a preferable scheme of the laser powder bed melting forming device based on the rotary powder laying mechanism of the invention, wherein: the inside third driving piece that still is provided with of cylindricality main part, the baffle center is provided with the shaft hole, the third driving piece is provided with the drive shaft, the drive shaft pass the shaft hole with the scraper blade is connected.
As a preferable scheme of the laser powder bed melting forming device based on the rotary powder laying mechanism of the invention, wherein: the scraper blade is hollow inside, one side of the scraper blade is connected with a scraper, a side face of the scraper blade opposite to the scraper blade is provided with a plurality of air blowing openings, and one end face of each air blowing opening, which is far away from the cylindrical main body, is provided with an air inlet.
As a preferable scheme of the laser powder bed melting forming device based on the rotary powder laying mechanism of the invention, wherein: the scraper blade is internally provided with a baffle along the length direction, and a gap is formed between the lower part of the baffle and the bottom surface of the scraper blade.
As a preferable scheme of the laser powder bed melting forming device based on the rotary powder laying mechanism of the invention, wherein: the workpiece support is characterized by further comprising a working table plate, wherein a circular hole is formed in the working table plate, the circular hole is matched with the cylindrical main body in size and is connected to the end face of the cylindrical main body, an accommodating cylinder coaxial with the cylindrical main body is arranged above the working table plate, a forming cavity is arranged inside the accommodating cylinder, and an opening at the lower end of the forming cavity is connected with the working table plate; an observation opening is formed in one side of the forming cavity.
As a preferable scheme of the laser powder bed melting forming device based on the rotary powder laying mechanism of the invention, wherein: an air outlet is formed in one side, far away from the powder groove, of the accommodating column body; the powder feeding device is characterized in that a semi-annular plate is arranged in the forming cavity, the gas outlet is located between the semi-annular plate and the working table plate, a plurality of guide plates are evenly arranged between the semi-annular plate and the working table plate, and one ends, far away from the powder groove, of the guide plates incline towards the gas outlet.
As a preferable scheme of the laser powder bed melting and forming device based on the rotary powder laying mechanism of the invention, wherein: the part of the clapboard, which is positioned on one side of the shaft hole, is provided with a powder leakage groove, and a collection tank is arranged in the powder leakage groove.
As a preferable scheme of the laser powder bed melting forming device based on the rotary powder laying mechanism of the invention, wherein: and the first piston is provided with a forming substrate, and the second piston is provided with a powder substrate.
As a preferable scheme of the laser powder bed melting forming device based on the rotary powder laying mechanism of the invention, wherein: the laser beam machining device is characterized by further comprising a rack, the rack is a rectangular frame, the working table plate is fixedly arranged inside the rack, a mounting hole is formed in one side of the containing cylinder body in the forming groove, a light path system is arranged above the mounting hole, and the light path system is connected with a laser generator.
The invention has the beneficial effects that: the traditional linear reciprocating powder spreading mode is abandoned, and the circumferential rotating powder spreading mode of matching the powder spreading mechanism directly driven by the driving motor and the quasi-cylindrical working cylinder body is adopted, so that the powder spreading time is greatly reduced and the forming efficiency is improved while the uniform deposition of the powder is ensured. In addition, the powder spreading device is integrated with an air inlet and blowing function, and the blowing port array on the powder spreading device can always face the arc-shaped distributed flow guide and smoke exhaust device after the powder spreading device finishes powder spreading in the forming process, so that a high-efficiency and stable air flow passage is formed, and smoke and dust in the printing process are effectively removed. The innovation of the powder paving mode and the multifunctional integration of the powder paving device effectively solve the problem of structural redundancy in the traditional forming device, save the space of a forming cavity, and have very clear response to the requirements of small-size complex customized components on low cost, high speed and precise forming.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, 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 to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic structural diagram of a cylindrical body in a laser powder bed melting and forming device based on a rotary powder laying mechanism according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view of a cylindrical body in a laser powder bed fusion forming apparatus based on a rotary powder-spreading mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an internal structure of a cylindrical body in a laser powder bed fusion forming device based on a rotary powder laying mechanism according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a forming assembly and a powder spreading assembly in a laser powder bed melting and forming device based on a rotary powder spreading mechanism according to an embodiment of the invention;
FIG. 5 is a schematic structural diagram of a powder laying assembly in a laser powder bed melting and forming device based on a rotary powder laying mechanism according to an embodiment of the invention;
FIG. 6 is a schematic cross-sectional view of a powder spreading assembly in a laser powder bed fusion forming apparatus based on a rotary powder spreading mechanism according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a semi-annular plate and a deflector of a laser powder bed fusion forming device based on a rotary powder-spreading mechanism according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of an entire laser powder bed melting and forming device based on a rotary powder laying mechanism according to an embodiment of the invention;
FIG. 9 is a schematic cross-sectional view of a laser powder bed fusion forming apparatus based on a rotary powder-spreading mechanism according to an embodiment of the present invention;
fig. 10 is a schematic structural principle and a schematic use diagram of a laser powder bed melting and forming device based on a rotary powder laying mechanism according to an embodiment of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures of the present invention are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the device structures are not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 to 4, the present embodiment provides a laser powder bed melting and forming apparatus based on a rotary powder spreading mechanism, including a forming assembly 100 and a powder spreading assembly 200; the molding assembly 100 comprises a cylindrical body 101, the cylindrical body 101 is cylindrical, a molding groove 101a and a powder groove 101b are formed in the upper end of the cylindrical body, the molding groove 101a and the powder groove 101b are symmetrically arranged, two surfaces of the molding groove 101a and the powder groove 101b are parallel, the radiuses of two cambered surfaces are consistent, a first piston 102 is arranged in the molding groove 101a, a second piston 103 is arranged in the powder groove 101b, the first piston 102 can axially move in the molding groove 101a, the second piston 103 can axially move in the second piston 103, and a partition plate 101c is formed between the molding groove 101a and the powder groove 101 b; the partition plate 101c is arranged in the radial direction of the cylindrical body 101, and two side surfaces of the partition plate 101c are the side surfaces of the forming groove 101a and the powder groove 101 b; the powder spreading assembly 200 includes a scraper 201 provided on the partition 101 c. Wherein the length of the scraper 201 corresponds to the diameter of the cylindrical body 101.
Further, a first driving member 104 and a second driving member 105 are arranged inside the cylindrical main body 101, the first driving member 104 and the second driving member 105 are both hydraulic cylinders and can output linear motion, the first driving member 104 is provided with a first piston rod 104a, and the second driving member 105 is provided with a second piston rod 105 a; the first piston rod 104a extends into the forming groove 101a to be connected with the first piston 102, and the second piston rod 105a extends into the powder groove 101b to be connected with the second piston 103. The heights of the first and second pistons 102, 103 are thus controlled by the first and second drivers 104, 105.
Further, a third driving member 106 is arranged inside the cylindrical body 101, the third driving member 106 is a motor, a shaft hole 101d is arranged in the center of the partition plate 101c, the third driving member 106 is provided with a driving shaft 106a, and the driving shaft 106a penetrates through the shaft hole 101d to be connected with the scraper 201. The blade 201 is thus driven in rotation by the motor; the scraper 201 is hollow, one side of the scraper 201 is connected with a scraper 202, one side of the scraper 202 is fixedly arranged on the scraper 201, and one side of the edge of the scraper 202 is perpendicular to the upper surface of the cylindrical main body 101. A plurality of air blowing openings 201a are arranged on one side surface of the scraper 201 opposite to the scraper 202, and an air inlet 201b is arranged on one end surface of the air blowing openings 201a far away from the cylindrical body 101. The air inlet 201b is connected with an air pump, and is inflated by the air pump and is ejected from the air blowing openings 201a, in this embodiment, 4 rows of air blowing openings 201a are arranged and are uniformly distributed, and two adjacent rows of air blowing openings 201a are distributed in a staggered manner.
In this embodiment, the powder spreading assembly 200 uses the third driving member 106 to rotate around the axis of symmetry of the geometric center of the cylindrical body 101, so as to uniformly spread the powder in the semicircular forming area.
Example 2
Referring to fig. 1 to 10, a second embodiment of the present invention is based on the previous embodiment, and is different from the previous embodiment in that:
in this embodiment, the scraper 201 is provided with a baffle 203 along the length direction, and a gap is formed between the lower side of the baffle 203 and the bottom surface of the scraper 201. Leading the air to enter from the lower part of the baffle plate and then blowing out from the air blowing openings 201a of the array; without the baffle, most of the gas may be directly blown out from the upper rows of the gas outlets 201a, and the amount of the gas blown out from the lower rows of the gas outlets 201a is small, so that the smoke generated in the laser forming process cannot be well blown away.
Further, still include the work platen 204, seted up the circular port on the work platen 204, and the circular port is coincided with cylindricality main part 101 size, connects at the terminal surface of cylindricality main part 101 to connect through the welding mode.
A containing cylinder 205 which is coaxial with the cylindrical body 101 is arranged above the working table plate 204, a forming cavity 205a is arranged in the containing cylinder 205, and the lower end opening of the forming cavity 205a is connected with the working table plate 204; an observation opening 205d is formed at one side of the molding cavity 205 a. The observation port 205d is an arc-shaped operation window and is provided with a window mirror.
An air outlet 205b is formed in one side, away from the powder groove 101b, of the accommodating column 205; therefore, the air inlet 201b is provided at the upper end of the rotation center of the squeegee 201, and enters the air outlet through the inside barrier 203 to be blown out to form an air flow path.
A semi-annular plate 206 is arranged in the forming cavity 205a, the air outlet 205b is positioned between the semi-annular plate 206 and the worktable plate 204 to form a ring pipe shape, a plurality of guide plates 207 are uniformly arranged between the semi-annular plate 206 and the worktable plate 204, and one end of each guide plate 207, which is far away from the powder groove 101b, inclines towards the air outlet 205 b. The guide plates 207 are integrally distributed along the arc inside the forming cavity 205a, so that the guide directions of any two adjacent guide plates 207 are deviated to the air outlet 205b and surround the outer side of the forming groove 101a, the generated smoke dust can be better and more widely collected and guided, and the forming quality is favorably improved.
The baffle 207 functions to guide the inside smoke or powder to be discharged from the gas outlet 205 b.
Further, a powder leakage groove 101e is provided in a portion of the partition plate 101c on the shaft hole 101d side, and a collection tank 107 is provided inside the powder leakage groove 101 e.
The first piston 102 is provided with a molding base plate 102a, and the second piston 103 is provided with a powder base plate 103 a.
In this embodiment, the machine frame 300 is a rectangular frame, the machine frame is formed by welding a plurality of sectional materials, and the working platen 204 is fixedly arranged inside the machine frame 300 and connected by welding; the accommodating cylinder 205 is provided with a mounting hole 205c at one side of the molding groove 101a, the optical path system 400 is provided above the mounting hole 205c, and the laser generator 500 is connected to the optical path system 400.
The optical system 400 is a Laser scanning galvanometer system, that is, a Laser scanning galvanometer system in the prior art, and further includes a display operating system disposed on the frame, where the Laser scanning galvanometer system, the display operating system, and the Laser generator are all devices in Laser Powder Bed Fusion (LPBF) in the prior art.
It should be noted that the laser irradiation range led out by the optical path system 400 can meet the requirement of the forming area of the forming groove 101a, and at the same time, the laser focus is just on the upper surfaces of the forming groove 101a and the forming substrate 102a, the laser generator is fixed at the middle and lower end of the rack, and the display operating system is connected to the external position at the middle of the right side of the rack through a hinge.
The structural principle and the using steps of the invention are further explained by combining the attached drawings:
in the forming process, firstly, the second piston 103 in the powder groove 101b rises for a certain layer thickness, the first piston 102 in the forming groove 101a descends for a layer thickness, then the powder spreading assembly 200 is driven by the motor of the third driving piece 106 to do anticlockwise circular rotation motion around the central axis of the cylindrical main body cylinder, in the process, the scraper 202 continuously pushes the powder in the powder groove 101b towards the powder spreading motion direction along the circumferential direction until the scraper 201 rotates for a circle (360 degrees), the powder is uniformly deposited in the forming groove 101a, the redundant supplied powder enters the powder leakage groove 101e along with the rotation of the scraper 201, then the laser work prints a sample, the powder spreading device keeps the initial position still until the layer is processed, meanwhile, inert gas passing through an air inlet at the upper end of the scraper 202 is blown out through the partition plate and the air blowing port array, and smoke dust generated by the laser-powder action passes through the semi-annular plate 206 at the inner side of the containing cylinder 205, The baffle 207 is quickly brought to the outlet. The whole process forms a period, and the period is continuously circulated until the sample is formed.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a laser powder bed melts forming device based on rotatory powder mechanism of spreading which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the forming assembly (100) comprises a cylindrical main body (101), a forming groove (101a) and a powder groove (101b) are formed in the upper end of the cylindrical main body, the forming groove (101a) and the powder groove (101b) are symmetrically arranged, a first piston (102) is arranged in the forming groove (101a), a second piston (103) is arranged in the powder groove (101b), and a partition plate (101c) is formed between the forming groove (101a) and the powder groove (101 b);
and the powder spreading assembly (200) comprises a scraper (201) arranged on the partition plate (101 c).
2. The laser powder bed melting and forming device based on the rotary powder laying mechanism as claimed in claim 1, wherein: a first driving piece (104) and a second driving piece (105) are arranged in the cylindrical main body (101), the first driving piece (104) is provided with a first piston rod (104a), and the second driving piece (105) is provided with a second piston rod (105 a); the first piston rod (104a) extends into the forming groove (101a) and is connected with the first piston (102), and the second piston rod (105a) extends into the powder groove (101b) and is connected with the second piston (103).
3. The laser powder bed melting and forming device based on the rotary powder laying mechanism as claimed in claim 2, wherein: the inside third driving piece (106) that still is provided with of cylindricality main part (101), baffle (101c) center is provided with shaft hole (101d), third driving piece (106) are provided with drive shaft (106a), drive shaft (106a) pass shaft hole (101d) with scraper blade (201) are connected.
4. The laser powder bed melting and forming device based on the rotary powder laying mechanism as claimed in claim 2 or 3, wherein: the scraper blade (201) is hollow, one side of the scraper blade (201) is connected with the scraper blade (202), one side of the scraper blade (201) opposite to the scraper blade (202) is provided with a plurality of air blowing openings (201a), and one end face, away from the cylindrical main body (101), of each air blowing opening (201a) is provided with an air inlet (201 b).
5. The laser powder bed melting and forming device based on the rotary powder laying mechanism as claimed in claim 4, wherein: a baffle (203) is arranged inside the scraper (201) along the length direction, and a gap is formed between the lower part of the baffle (203) and the bottom surface of the scraper (201).
6. The laser powder bed melting and forming device based on the rotary powder laying mechanism as claimed in claim 5, wherein: the device is characterized by further comprising a working table plate (204), wherein a circular hole is formed in the working table plate (204), the circular hole is matched with the cylindrical main body (101) in size and is connected to the end face of the cylindrical main body (101), an accommodating cylinder (205) coaxial with the cylindrical main body (101) is arranged above the working table plate (204), a forming cavity (205a) is formed in the accommodating cylinder (205), and an opening at the lower end of the forming cavity (205a) is connected with the working table plate (204); an observation port (205d) is formed in one side of the forming cavity (205 a).
7. The laser powder bed melting and forming device based on the rotary powder laying mechanism as claimed in claim 6, wherein: an air outlet (205b) is formed in one side, away from the powder groove (101b), of the accommodating column body (205); a semi-annular plate (206) is arranged in the forming cavity (205a), the air outlet (205b) is located between the semi-annular plate (206) and the working table plate (204), a plurality of guide plates (207) are uniformly arranged between the semi-annular plate (206) and the working table plate (204), and one end, far away from the powder groove (101b), of each guide plate (207) inclines towards the air outlet (205 b).
8. The laser powder bed melting and forming device based on the rotary powder laying mechanism as claimed in claim 7, wherein: the powder leakage groove (101e) is formed in the part, located on one side of the shaft hole (101d), of the partition plate (101c), and a collecting tank (107) is arranged inside the powder leakage groove (101 e).
9. The laser powder bed melting and forming device based on the rotary powder laying mechanism as claimed in claim 8, wherein: the first piston (102) is provided with a forming substrate (102a), and the second piston (103) is provided with a powder substrate (103 a).
10. The laser powder bed melting and forming device based on the rotary powder laying mechanism as claimed in claim 9, wherein: the laser processing device is characterized by further comprising a rack (300), wherein the rack (300) is a rectangular frame, the working table plate (204) is fixedly arranged inside the rack (300), a mounting hole (205c) is formed in one side of the forming groove (101a) of the accommodating column body (205), a light path system (400) is arranged above the mounting hole (205c), and the light path system (400) is connected with a laser generator (500).
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| CN202210277363.4A CN114682806B (en) | 2022-03-14 | 2022-03-14 | Laser powder bed melting forming device based on rotary powder spreading machine |
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| CN116330651A (en) * | 2023-03-31 | 2023-06-27 | 苏州研拓自动化科技有限公司 | Polymer material 3D printer shop powder mechanism based on keep apart bowl |
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| CN114682806B (en) | 2023-05-05 |
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