CN106825573B - Selective laser melting assembly and 3D printer - Google Patents
Selective laser melting assembly and 3D printer Download PDFInfo
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- CN106825573B CN106825573B CN201710242538.7A CN201710242538A CN106825573B CN 106825573 B CN106825573 B CN 106825573B CN 201710242538 A CN201710242538 A CN 201710242538A CN 106825573 B CN106825573 B CN 106825573B
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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
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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
- B22F10/10—Formation of a green body
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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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
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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
- B33Y10/00—Processes of additive manufacturing
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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
- 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
- B22F12/224—Driving means for motion along a direction within 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
- B22F12/22—Driving means
- B22F12/226—Driving means for rotary motion
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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
- B22F12/40—Radiation means
- B22F12/44—Radiation means characterised by the configuration of the radiation means
- B22F12/45—Two or more
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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
Abstract
The invention relates to the technical field of 3D printing of selective laser melting metal, in particular to a selective laser melting assembly and a 3D printer. The selective laser melting assembly comprises: a plurality of selective laser melting devices; each selective laser melting device comprises a fixed part, a movable part and a moving mechanism; the movable part is connected with the fixed part in a sliding way; the moving mechanism is connected with the movable part and used for driving the movable part to linearly slide relative to the fixed part; the plurality of selective laser melting devices are sequentially arranged along a direction parallel to the moving direction of the movable part. The moving mechanism drives the moving part to drive the laser coupling and excitation mechanism to move and work, so that the moving range of the laser coupling and excitation mechanism is wider, the laser coupling and excitation mechanism is not limited by the deflection angle of the laser galvanometer, the range of laser beams irradiating the metal powder layer is wider, the size of a forming component of the process technical equipment is larger, and the process technical equipment and the equipment thereof can be popularized and applied in the world.
Description
Technical Field
the invention relates to the technical field of 3D printing of selective laser melting metal, in particular to a selective laser melting assembly and a 3D printer.
Background
the additive manufacturing 3D printing technology is a construction technology which is based on a digital model file (CAD), uses materials such as powdered metal, PVC, resin, fiber and the like, slices a CAD three-dimensional configuration object through special software in the modes of fused deposition, laser sintering, laser melting, laser solidification and laser cladding, reduces dimensions, and then prints the object layer by layer according to slices, is a new technology which is rapidly developing in the manufacturing industry, and is one of important marks of the third industrial revolution in the British journal of economic academy and the third industrial revolution.
The 3D printing technology for melting metal in selective laser areas is characterized in that high-energy-density laser beams are used for scanning under the control of a computer program, metal powder layers which are paved in advance are selectively melted and are metallurgically combined with a substrate, then powder is paved, scanned and melted layer by layer continuously, and finally the manufacturing process of three-dimensional metal parts is completed. The technology can be used for manufacturing metal parts with complex shapes, the formed parts have good mechanical properties and high precision, the density of the formed parts reaches more than 99% of that of the formed parts made of traditional metallurgy, and the technology has important application in the fields of medical treatment, aerospace, military industry, nuclear power construction, product research and development and the like.
In the prior art, a laser beam of a selective laser melting 3D printer is reflected to a metal powder layer through a laser galvanometer to be selectively melted, and the position of the metal powder layer irradiated by the laser beam is adjusted by adjusting the deflection angle of the laser galvanometer, so that the metal powder layers at different positions are melted. However, due to the limitation of the deflection angle of the laser galvanometer, the range of the laser beam irradiating the metal powder layer is smaller, the size of the forming component of the process technology equipment is smaller, and the popularization and the application of the process technology and the equipment thereof in the world are severely restricted.
Known data show that the maximum size of the component formed by using the laser selective melting process equipment in the world currently has the volume of 500mm in length, 500mm in width and 500mm in height. In 2016, the department of science and technology in China sets the central financial cost to be about 4 hundred million yuan for the science and technology attacking project in the field of material increase manufacturing, 3850.00 ten thousand yuan is invested for the science and technology attacking project of two laser selective melting process equipment, one of the two laser selective melting process equipment is technical equipment with attacking and forming size ranges of more than or equal to 500mm multiplied by 500mm, and the implementation period of the project is 5 years. The technical equipment is used for forming large-size components with the size range exceeding 500mm multiplied by 500mm, and the forming of the large-size components becomes an important competitive direction for the countries in the world to seize the high points of the intelligent high-end manufacturing technology.
Disclosure of Invention
The invention aims to provide a selective laser melting assembly and a 3D printer, and aims to solve the technical problem that the size of a component which can be molded by the 3D printer in the prior art is small.
The invention provides a selective laser melting assembly, which comprises: a plurality of selective laser melting devices; each laser selective melting device comprises a fixed part, a movable part and a moving mechanism; the movable part is connected with the fixed part in a sliding way; the moving mechanism is connected with the movable part and used for driving the movable part to linearly slide relative to the fixed part;
The moving mechanism is used for being electrically connected with a control system of the 3D printer; the movable part is used for installing a laser coupling and excitation mechanism of the 3D printer; the fixing part is used for being fixedly connected with a box body of the 3D printer;
the plurality of selective laser melting devices are sequentially arranged along the direction parallel to the moving direction of the movable part.
Further, the movable part comprises a moving part and a mounting part; the mounting part is fixedly connected with the moving part; the mounting piece is used for mounting a laser coupling and excitation mechanism of the 3D printer; the moving part is connected with the fixed part in a sliding way; the moving mechanism is connected with the moving part and used for driving the moving part to linearly slide relative to the fixing part.
Furthermore, the selective laser melting device also comprises a vertical limiting structure; the moving mechanism is used for driving the movable part to linearly slide along the front-back direction relative to the fixed part; the vertical limiting structure is arranged on the movable part; the vertical limiting structure is used for preventing the movable part from moving up and down.
further, the vertical limiting structure comprises a vertical sliding groove and a vertical stabilizing wheel arranged in the sliding groove in a sliding manner; the vertical sliding groove is arranged on the fixing part; the vertical stabilizing wheels are vertically arranged; the vertical stabilizing wheel is rotationally connected with the movable part; the upper end and the lower end of the vertical stabilizing wheel are respectively abutted to the top wall and the bottom wall of the vertical sliding groove.
furthermore, the selective laser melting device also comprises a transverse limiting structure; the transverse limiting structure is arranged on the movable part; the transverse limiting structure is used for preventing the movable part from moving left and right.
Furthermore, the transverse limiting structure comprises a transverse sliding groove and a transverse stabilizing wheel arranged in the sliding groove in a sliding manner; the transverse sliding groove is arranged on the fixing part; the transverse stabilizing wheels are horizontally arranged; the transverse stabilizing wheel is rotationally connected with the movable part; and the left end and the right end of the transverse stabilizing wheel are respectively abutted with the left side wall and the right side wall of the transverse sliding groove.
Further, the fixing part comprises a left slide rail and a right slide rail which are arranged in parallel at intervals; the moving member comprises a moving base; the left end of the movable base is connected with the left sliding rail in a sliding mode, and the right end of the movable base is connected with the right sliding rail in a sliding mode.
Further, the axis of rotation of the mount is perpendicular to the horizontal.
Further, the upper end of installed part with the lower extreme fixed connection of moving member.
further, the invention also provides a 3D printer, and the 3D printer comprises the laser selective melting assembly.
the laser selective melting assembly provided by the invention comprises a plurality of laser selective melting devices, wherein the plurality of laser selective melting devices are sequentially arranged along a direction parallel to the moving direction of the movable part, namely, the plurality of laser selective melting devices are arranged along a straight line. Each selective laser melting device comprises a fixed part, a movable part and a moving mechanism. When the laser printer is used, the fixed part is fixed on a box body of the 3D printer, the movable part is provided with the laser coupling and excitation mechanism, and the moving mechanism is electrically connected with a control system of the 3D printer. The control system controls the moving mechanism. The moving mechanism drives the movable part to linearly slide relative to the fixed part, and simultaneously drives the laser coupling and excitation mechanism on the movable part to linearly move, and the laser coupling and excitation mechanism irradiates a light beam to a metal powder layer on a working surface to be selectively melted in the moving process, so that the forming and manufacturing of the component are finally completed.
According to the selective laser melting assembly provided by the invention, the moving mechanism drives the moving part to drive the laser coupling and excitation mechanism to move and work, so that the moving range of the laser coupling and excitation mechanism is wider, the selective laser melting assembly is not limited by the deflection angle of the laser galvanometer, and the range of laser beams irradiating a metal powder layer is wider, so that the size of a forming component of the process technical equipment is larger, and the popularization and application of the process technology and the equipment thereof in the world are facilitated. The user can select the number of selective laser melting according to the size of the actual component. The selective laser melting assembly provided by the invention is suitable for forming and manufacturing components of a rectangular powder bed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a selective laser melting assembly according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a selective laser melting apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view of a partial structure of a selective laser melting apparatus according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a left slide rail in the laser selective melting apparatus according to the embodiment of the present invention;
Fig. 5 is another schematic structural diagram of a left slide rail in the laser selective melting apparatus according to the embodiment of the present invention;
Fig. 6 is a schematic structural view of a right slide rail in the selective laser melting apparatus according to the embodiment of the present invention;
fig. 7 is another schematic structural diagram of a right slide rail in the selective laser melting device according to the embodiment of the present invention.
Reference numerals:
1-a stationary part; 2-a movable part; 3-a vertical limiting structure;
4-transverse limiting structure; 5-selective laser melting device; 11-left slide rail;
12-right slide rail; 21-a moving member; 22-a mounting;
31-vertical stabilizer wheels; 32-vertical chutes; 41-left stabilizing wheel;
42-right stabilizing wheel; 43-left chute; 44-right chute;
211 — moving base.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
FIG. 1 is a schematic structural diagram of a selective laser melting assembly according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a selective laser melting apparatus according to an embodiment of the present invention; as shown in fig. 1 and 2, an embodiment of the present invention provides a selective laser melting assembly, including: a plurality of selective laser melting devices 5; each selective laser melting device 5 comprises a fixed part 1, a movable part 2 and a moving mechanism; the movable part 2 is connected with the fixed part 1 in a sliding way; the moving mechanism is connected with the movable part 2 and is used for driving the movable part 2 to linearly slide relative to the fixed part 1; the moving mechanism is used for being electrically connected with a control system of the 3D printer; the movable part 2 is used for installing a laser coupling and excitation mechanism of the 3D printer; the fixing part 1 is used for being fixedly connected with a box body of the 3D printer; the plurality of selective laser melting devices 5 are sequentially arranged in a direction parallel to the moving direction of the movable portion 2.
the laser selective melting assembly provided by the embodiment of the invention comprises a plurality of laser selective melting devices 5, wherein the plurality of laser selective melting devices 5 are sequentially arranged along a direction parallel to the moving direction of the movable part 2, namely, the plurality of laser selective melting devices 5 are linearly arranged. Each selective laser melting device 5 comprises a fixed part 1, a movable part 2 and a moving mechanism. When the laser printer is used, the fixed part 1 is fixed on a box body of the 3D printer, the movable part 2 is provided with a laser coupling and excitation mechanism, and the moving mechanism is electrically connected with a control system of the 3D printer. The control system controls the moving mechanism, the moving mechanism drives the movable part 2 to linearly slide relative to the fixed part 1, meanwhile, the laser coupling and excitation mechanism on the movable part 2 is driven to linearly move, the laser coupling and excitation mechanism irradiates light beams to the metal powder layer on the working surface to be selectively melted in the moving process, and finally, the forming and manufacturing of the component are finished.
according to the selective laser melting assembly provided by the embodiment of the invention, the moving mechanism drives the moving part 2 to drive the laser coupling and excitation mechanism to move and work, so that the moving range of the laser coupling and excitation mechanism is wider, the movable range is not limited by the deflection angle of the laser galvanometer, the range of laser beams irradiating a metal powder layer is wider, the size of a forming component of the process technical equipment is larger, and the popularization and application of the process technology and the equipment in the world are facilitated. The user can select the number of the selective laser melting devices according to the size of the actual component. The selective laser melting assembly provided by the invention is suitable for forming and manufacturing the rectangular powder bed component.
The moving mechanism may be in various forms, for example, the moving mechanism includes a motor, a gear, and a rack engaged with the gear. The gear is fixedly connected with a power output shaft of the motor, and the movable part 2 is fixedly connected with the rack. The motor drives the gear to rotate, and the gear drives the rack to move along a straight line, so that the movable part 2 is driven to move along a straight line relative to the fixed part 1.
The shape of the fixation part 1 may be various, for example: square, circular, or irregular, etc.
on the basis of the above embodiment, further, the movable part 2 includes the moving member 21 and the mounting member 22; the mounting part 22 is fixedly connected with the moving part 21; the mounting part 22 is used for mounting a laser coupling and excitation mechanism of the 3D printer; the moving part 21 is connected with the fixed part 1 in a sliding way; the moving mechanism is connected with the moving part 21 and used for driving the moving part 21 to linearly slide relative to the fixed part 1.
In this embodiment, the movable portion 2 is provided as a movable member 21 and an installation member 22, the movable member 21 slides relative to the fixing portion 1, the installation member 22 is fixedly connected to the movable member 21, and the installation member 22 is provided with a laser coupling and excitation mechanism, so that the laser coupling and excitation mechanism can be conveniently installed.
Further, the moving mechanism can drive the moving part 21 to reciprocate linearly relative to the fixed part 1; when the moving mechanism drives the moving piece 21 to move towards the first direction, the rotating mechanism drives the mounting piece 22 to rotate clockwise; when the moving mechanism drives the moving member 21 to move towards the second direction, the rotating mechanism drives the mounting member 22 to rotate anticlockwise; the first direction is opposite to the second direction.
As shown in fig. 2, on the basis of the above embodiment, further, the selective laser melting device 5 further includes a vertical limiting structure 3; the moving mechanism is used for driving the movable part 2 to linearly slide along the front-back direction relative to the fixed part 1; the vertical limiting structure 3 is arranged on the movable part 2; the vertical limiting structure 3 is used for preventing the movable part 2 from moving up and down.
In this embodiment, set up vertical limit structure 3 on movable part 2, when movable part 2 relative fixed part 1 slides along the fore-and-aft direction straight line, vertical limit structure 3 can prevent that movable part 2 from reciprocating to guarantee the stability of movable part 2 in vertical direction, and then guarantee laser coupling and excitation mechanism at the ascending stability of vertical side, avoid laser coupling and excitation mechanism to take place to rock in vertical direction, improved the fashioned precision of melting.
Wherein, vertical limit structure 3's structural style can be multiple, for example, sets up the spout on fixed part 1, sets up the slider on movable part 2, and the slider cunning is established in the spout, and with the roof and the diapire butt of spout, because the roof and the diapire of spout exert the effort to the slider simultaneously to carry on spacingly with the slider in vertical direction, and then avoid movable part 2 to reciprocate. Preferably, the top wall and the bottom wall of the sliding groove are both in a zigzag shape, the upper surface and the lower surface of the sliding block are both in a zigzag shape, and the sliding block is slidably arranged in the sliding groove. The roof and the diapire of spout can exert the effort to the slider in the left and right directions to with the slider spacing on the left and right directions, can prevent like this simultaneously that the slider from removing along the left and right directions, prevent that movable part 2 from rocking on the left and right directions, stability when further having improved movable part 2 and removing.
FIG. 3 is a schematic view of a partial structure of a selective laser melting apparatus according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of a left slide rail in the laser selective melting apparatus according to the embodiment of the present invention; fig. 5 is another schematic structural diagram of a left slide rail in the laser selective melting apparatus according to the embodiment of the present invention; fig. 6 is a schematic structural view of a right slide rail in the selective laser melting apparatus according to the embodiment of the present invention; FIG. 7 is another schematic structural diagram of a right slide rail of the selective laser melting apparatus according to an embodiment of the present invention; as shown in fig. 2 to 7, on the basis of the above embodiment, further, the vertical limiting structure 3 includes a vertical sliding chute 32 and a vertical stabilizing wheel 31 slidably disposed in the sliding chute; the vertical sliding groove 32 is arranged on the fixing part 1; the vertical stabilizing wheels 31 are vertically arranged; the vertical stabilizing wheel 31 is rotationally connected with the movable part 2; the upper and lower ends of the vertical stabilizer wheels 31 abut against the top and bottom walls of the vertical slide groove 32, respectively.
In this embodiment, the vertical stabilizing wheels 31 are rotatably connected to the movable portion 2, the upper ends and the lower ends of the vertical stabilizing wheels 31 are respectively abutted to the top wall and the bottom wall of the vertical sliding groove 32, and the top wall and the bottom wall of the vertical sliding groove 32 exert an acting force on the vertical stabilizing wheels 31, so that the vertical stabilizing wheels 31 are limited in the vertical direction, and the movable portion 2 is prevented from moving up and down. Meanwhile, when the movable part 2 moves, the vertical stabilizing wheels 31 rotate in the vertical sliding grooves 32, and the moving friction between the movable part 2 and the fixed part 1 is converted into rolling friction, so that the friction force is reduced, and the friction loss is reduced.
wherein, there may be a plurality of vertical stabilizing wheels 31, preferably, there are four vertical stabilizing wheels 31 and two vertical sliding chutes 32. Two vertical sliding grooves 32 are arranged in parallel at intervals on the fixing portion 1. Two vertical stabilizing wheels 31 are arranged in one vertical sliding groove 32 at intervals along the extending direction of the sliding groove, and the other two vertical stabilizing wheels 31 are arranged in the other vertical sliding groove 32 at intervals along the extending direction of the sliding groove. The provision of four vertical stabilizing wheels 31 increases the stability of the mobile part 2 when it is moved.
as shown in fig. 2 to 7, on the basis of the above embodiments, further, the selective laser melting device 5 further includes a lateral limiting structure 4; the transverse limiting structure 4 is arranged on the movable part 2; the transverse limiting structure 4 is used for preventing the movable part 2 from moving left and right.
in this embodiment, set up horizontal limit structure 4 on movable part 2, when movable part 2 relative fixed part 1 slides along the fore-and-aft direction straight line, horizontal limit structure 4 can prevent that movable part 2 from removing about to guarantee movable part 2's stability in the horizontal direction, and then guarantee laser coupling and excitation mechanism and in the ascending stability of horizontal direction, avoid laser coupling and excitation mechanism to take place to rock in the horizontal direction, further improved the precision of melting machine-shaping.
Wherein, horizontal limit structure 4's structural style can be multiple, for example, horizontal limit structure 4 includes spout and slider, and the spout setting is on fixed part 1, and the slider setting is on movable part 2, the left end and the right-hand member of slider respectively with the left side wall and the right side wall butt of spout to it is spacing with the slider in horizontal. Preferably, the upper end and the lower extreme of slider respectively with the roof and the diapire butt of spout to it is spacing with the slider in vertical, activity portion 2 like this can not take place the shake in vertical and horizontal, has improved activity portion 2's stability.
as shown in fig. 2 to 7, on the basis of the above embodiment, further, the lateral limiting structure 4 includes a lateral sliding slot and a lateral stabilizing wheel slidably disposed in the sliding slot; the transverse sliding groove is arranged on the fixing part 1; the transverse stabilizing wheels are horizontally arranged; the transverse stabilizing wheel is rotationally connected with the movable part 2; the left end and the right end of the transverse stabilizing wheel are respectively abutted with the left side wall and the right side wall of the transverse sliding groove.
In this embodiment, the transverse stabilizing wheel is connected with the rotation of the movable part 2, the left end and the right end of the transverse stabilizing wheel are respectively abutted against the left side wall and the right side wall of the transverse sliding groove, and the left side wall and the right side wall of the transverse sliding groove exert an acting force on the transverse stabilizing wheel, so that the transverse stabilizing wheel is limited in the transverse direction, and the movable part 2 is prevented from moving left and right. Meanwhile, when the movable part 2 moves, the transverse stabilizing wheels rotate in the transverse sliding grooves, and the moving friction between the movable part 2 and the fixed part 1 is converted into rolling friction, so that the friction force is reduced, and the friction loss is reduced.
preferably, the lateral stabilizing wheels include a left stabilizing wheel 41 and a right stabilizing wheel 42, and the left and right stabilizing wheels 41 and 42 are rotatably connected to the movable portion 2 at a lateral interval. The lateral sliding grooves include a left sliding groove 43 and a right sliding groove 44, and the left sliding groove 43 and the right sliding groove 44 are provided on the fixing portion 1 at intervals in the lateral direction. The left stabilizer wheel 41 is disposed in the left link 43, and the left end of the left stabilizer wheel 41 abuts against the left side wall of the left link 43, and the right stabilizer wheel 42 is disposed in the right link 44, and the right end of the right stabilizer wheel 42 abuts against the right side wall of the right link 44.
Preferably, there are two lateral stabilizing wheels, that is, there are two left stabilizing wheels 41 and two right stabilizing wheels 42, and there are four vertical stabilizing wheels 31, so that eight stabilizing wheels are matched to limit the position of the movable part 2, and the stabilizing effect of the movable part 2 is the best.
on the basis of the above embodiment, further, the fixing part 1 includes a left slide rail 11 and a right slide rail 12 which are arranged in parallel and spaced; the mover 21 includes a moving base 211; the left end of the movable base 211 is slidably connected with the left slide rail 11, and the right end is slidably connected with the right slide rail 12.
in this embodiment, the left end and the left slide rail 11 sliding connection of mobile base 211, the right end and the right slide rail 12 sliding connection, left slide rail 11 and right slide rail 12 support mobile base 211 respectively for mobile base 211 atress is stable.
Further, two vertical stabilizing wheels 31 and two left stabilizing wheels 41 are disposed on the left slide rail 11. Two vertical stabilizing wheels 31 and two right stabilizing wheels 42 are provided on the right slide rail 12.
On the basis of the above embodiment, further, the rotation axis of the mount 22 is perpendicular to the horizontal plane.
In this embodiment, the rotation axis of the mounting member 22 is perpendicular to the horizontal plane, so that the laser beam coupled to the excitation mechanism can be accurately positioned at the preset position, and the processing precision is further improved.
on the basis of the above embodiment, further, the upper end of the mounting piece 22 is fixedly connected with the lower end of the moving piece 21.
In this embodiment, the laser coupling and excitation mechanism on the mounting part 22 emits a beam downward, so that the moving part 21 is prevented from affecting the beam to irradiate the metal powder layer, and the precision of the member machining and forming is improved.
On the basis of the above embodiment, further, the embodiment of the present invention further provides a 3D printer, and the 3D printer includes the selective laser melting assembly of the present invention. The working principle of the selective laser melting assembly is the same as that of the selective laser melting assembly, and the detailed description is omitted.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A selective laser melting assembly, comprising: a plurality of selective laser melting devices;
each laser selective melting device comprises a fixed part, a movable part and a moving mechanism; the movable part is connected with the fixed part in a sliding way; the moving mechanism is connected with the movable part and used for driving the movable part to linearly slide relative to the fixed part;
the moving mechanism is used for being electrically connected with a control system of the 3D printer; the movable part is used for installing a laser coupling and excitation mechanism of the 3D printer; the fixing part is used for being fixedly connected with a box body of the 3D printer;
The plurality of selective laser melting devices are sequentially arranged along the direction parallel to the moving direction of the movable part;
the selective laser melting device further comprises a vertical limiting structure; the moving mechanism is used for driving the movable part to linearly slide along the front-back direction relative to the fixed part;
The vertical limiting structure is arranged on the movable part; the vertical limiting structure is used for preventing the movable part from moving up and down;
the vertical limiting structure comprises a vertical sliding groove and a vertical stabilizing wheel arranged in the sliding groove in a sliding manner;
The vertical sliding groove is arranged on the fixing part; the vertical stabilizing wheels are vertically arranged; the vertical stabilizing wheel is rotationally connected with the movable part; the upper end and the lower end of the vertical stabilizing wheel are respectively abutted against the top wall and the bottom wall of the vertical sliding groove;
The selective laser melting device further comprises a transverse limiting structure;
The transverse limiting structure is arranged on the movable part; the transverse limiting structure is used for preventing the movable part from moving left and right;
the transverse limiting structure comprises a transverse sliding groove and a transverse stabilizing wheel arranged in the sliding groove in a sliding manner;
The transverse sliding groove is arranged on the fixing part; the transverse stabilizing wheels are horizontally arranged; the transverse stabilizing wheel is rotationally connected with the movable part; and the left end and the right end of the transverse stabilizing wheel are respectively abutted with the left side wall and the right side wall of the transverse sliding groove.
2. The selective laser melting assembly of claim 1, wherein the movable section comprises a moving member and a mounting member;
The mounting part is fixedly connected with the moving part; the mounting piece is used for mounting a laser coupling and excitation mechanism of the 3D printer;
The moving part is connected with the fixed part in a sliding way; the moving mechanism is connected with the moving part and used for driving the moving part to linearly slide relative to the fixing part.
3. the selective laser melting assembly of claim 2 wherein the stationary portion comprises a left rail and a right rail spaced in parallel; the moving member comprises a moving base;
The left end of the movable base is connected with the left sliding rail in a sliding mode, and the right end of the movable base is connected with the right sliding rail in a sliding mode.
4. the selective laser melting assembly of claim 2, wherein the axis of rotation of the mount is perpendicular to a horizontal plane.
5. The selective laser melting assembly of claim 2, wherein an upper end of the mounting member is fixedly coupled to a lower end of the moving member.
6. a 3D printer comprising the selective laser melting assembly of any of claims 1-5.
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| CN106863796B (en) * | 2017-04-12 | 2024-04-05 | 窦鹤鸿 | Laser selective melting device, component and 3D printer |
| CN107283831A (en) * | 2017-07-21 | 2017-10-24 | 中国科学院半导体研究所 | The intelligent increasing material manufacturing device and method of large-scale steel truss |
| CN107790718B (en) * | 2017-11-09 | 2020-03-31 | 窦鹤鸿 | Control system of 3D printing equipment |
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