CN104493165A - Electron beam melting and laser milling composite 3D printing apparatus - Google Patents
Electron beam melting and laser milling composite 3D printing apparatus Download PDFInfo
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- CN104493165A CN104493165A CN201410849765.2A CN201410849765A CN104493165A CN 104493165 A CN104493165 A CN 104493165A CN 201410849765 A CN201410849765 A CN 201410849765A CN 104493165 A CN104493165 A CN 104493165A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention relates to the technical field of 3D printing apparatus and discloses an electron beam melting and laser milling composite 3D printing apparatus. The3D printing apparatus comprises a base on which a machining platform is arranged; a powder spreading structure for spreading a metal powder on the machining platform is arranged on the base; an electron beam emitting structure and a laser milling head are arranged above the machining platform, respectively; the electron beam emitting structure emits an electron beam to melt the metal powder layer so as to form a single-layer or multi-layer approximate body; the laser milling head emits a laser beam to perform milling machining on the single-layer or multi-layer approximate body. The 3D printing apparatus is integrated with the removal machining taking laser milling as the principal method and the incremental laminating manufacturing process with electron beam melting 3D printing as the principal method, and therefore, the defects of the 3D printing technology in the aspects such as size and shape are overcome, the restriction of cutting to the complexity of parts and the like is overcome, the machined parts do not need to be machined secondarily, and the problems of difficult clamping, large machining error, part deformation during machining and difficult machining are avoided.
Description
Technical field
The present invention relates to the technical field of 3D printing device, particularly relate to electron beam melting and laser milling compound 3D printing device.
Background technology
Metal melting 3D printing technique (Selective Laser Melting, SLM) utilizes high brightness laser direct deposite metal dusty material, without the need to binding agent, goes out any parts with complex structures suitable with cast properties by 3D model straight forming.
Although metal melting 3D printing technique can mold the part reaching casting intensity rank, but the form error of the part molded is large, surface smoothness is not high, like this, part after shaping then needs to adopt traditional machining mode to carry out secondary operations to this, just can obtain the shape required by aeronautical manufacture industry and surface accuracy.And Aero-Space industry major part part, as the combustion chamber etc. of engine nozzle, blade, honeycomb, generally complex thin-wall or truss core structure, or larger-size shape, or the shape such as free form surface, when the part adopting metal melting 3D printing technique to process, then put into lathe when carrying out secondary operations, then there is following problem:
1), clamping difficulty, or after clamping, because coordinate transform cannot accurate locating element reference point, cause mismachining tolerance large;
2), for the part of thin-wall construction, add man-hour, due to the face without support part, cause part stress deformation;
3), part due to internal structure complicated, cutter cannot insert into the inner portion, causes being difficult to processing.
Due to the existence of the problems referred to above, although cause metal current melting 3D printing technique to be applied in the manufacturing of airplane parts, but application surface is narrower, only be applied to the part that some are not high to precision, requirement of strength, or in the processing of the part of the simpler and easy secondary mechanical processing of shape, also there is larger gap in distance extensive use.
Summary of the invention
The object of the present invention is to provide electron beam melting and laser milling compound 3D printing device, be intended to solve in prior art, adopt the part of metal melting 3D printing technique processing to carry out secondary operations at lathe, have that clamping difficulty, mismachining tolerance are large, part mutability and unmanageable problem.
The present invention is achieved in that electron beam melting and laser milling compound 3D printing device, and comprise pedestal, described pedestal is provided with the processing platform of vertically movement; Described pedestal is provided with the paving powder structure forming metal bisque for metal powder being laid on described processing platform; The top of described processing platform is respectively equipped with electron beam emitting structural and can at the laser milling head of solid space movement; Described electron beam emitting structural divergent bundle carries out melt-processed to the metal bisque be positioned on described processing platform and is similar to body to form single or multiple lift; Described laser milling hair is penetrated laser beam and is similar to body to the single or multiple lift be formed on described processing platform and carries out Milling Process.
Further, described pedestal is provided with two guide rails be arranged side by side separately, and described processing platform is described in two between guide rail; Described paving powder structure comprises scraper and Chu Fenxiang, and the two ends of described scraper are movably connected on guide rail described in two respectively, has gap between the lower end of described scraper and described processing platform; Described storage powder case has upper end open and for the powder storing chamber of device metal powder, is provided with the through hole alignd with the upper end open of described powder storing chamber in described pedestal; Be provided with vertical mobile and for metal powder being transported to the fortune powder platform on described pedestal in the powder storing chamber of described storage powder case, described fortune powder platform respectively with upper end open and the through hole alignment of described powder storing chamber.
Further, described pedestal is provided with two guide rails be arranged side by side separately, and described processing platform is described in two between guide rail; Described paving powder structure comprises scraper and is positioned at the leakage powder case above described scraper, and the two ends of described scraper are movably connected on guide rail described in two respectively, have gap between the lower end of described scraper and described processing platform; Be provided with the powder storing chamber for device metal powder in described leakage powder case, the lower end of described leakage powder case is provided with powder leakage hole, and the upper end of described scraper is provided with the collection powder groove for collecting the metal powder fallen via described powder leakage hole.
Further, described paving powder structure comprises two described scrapers and two described leakage powder casees, and two described scrapers are respectively arranged with front end and the rear end of described processing platform, and two described leakage powder casees lay respectively at the top of two described scrapers.
Further, the both sides of described processing platform are respectively equipped with the sensor for detecting the metal powder layer thickness be laid on described processing platform.
Further, described electron beam emitting structural comprises the electron beam generator of divergent bundle and the coil in energising generation magnetic field, the magnetic field that the electron beam that described electron beam generator is launched produces through described coil.
Further, two described guide rails are connected with door frame, described door frame comprises two linking arms and crossbeam arranged separately, and the lower end of two described linking arms is movably connected on two described guide rails respectively, and the two ends of described crossbeam are connected to the upper end of two described linking arms; Described crossbeam is connected with the mobile terminal of cross beam movement, described mobile terminal is connected with the connecting plate moved up and down relative to described mobile terminal, described laser milling head is connected on described connecting plate.
Further, the cooling line of Cooling Water circulation is provided with in described laser milling head.
Further, described electron beam melting and laser milling compound 3D printing device also comprise collection box, there is in described collection box the recycling cavity reclaiming metal powder on described pedestal for device, described collection box is positioned at the below of described pedestal, is provided with the recovery port being communicated with described recycling cavity in described pedestal.
Further, described electron beam melting and laser milling compound 3D printing device device are in the processing space of Processing Room, and the processing space of described Processing Room is vacuum shape or is filled with inert gas.
Compared with prior art, electron beam melting provided by the invention and laser milling compound 3D printing device processing parts, the electron beam utilizing electron beam emitting structural to launch is successively after motlten metal bisque, the laser beam utilizing laser milling hair to go out is similar to body to single or multiple lift and carries out Milling Process, be cycled to repeat until part completion of processing, this 3D printing device by traditional removal formula Precision Machining based on laser milling with print to main increment layered manufacturing technique with electron beam melting 3D and become one, the defect of traditional 3D printing technique in size and dimension precision etc. can be overcome, also the restriction of machining to aspects such as parts complexities can be overcome, like this, the part after to processing is not then needed to carry out secondary operations, avoid current clamping difficulty, mismachining tolerance is large, add man-hour part occur distortion and unmanageable problem, for 3D printing technique opens up more wide application space, for the manufacturing of aerospace industries core precision parts provides new ways and means, in addition, adopt laser beam to be similar to body to single or multiple lift and carry out Milling Process, belong to contactless Milling Process, being directly similar to body with single or multiple lift directly contacts the defect of processing and existing to avoid traditional type cutter, greatly improves the precision of Milling Process.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of the electron beam melting that provides of the embodiment of the present invention and laser milling compound 3D printing device;
Fig. 2 is the schematic perspective view of the laser milling head that the embodiment of the present invention provides.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Below in conjunction with specific embodiment, realization of the present invention is described in detail.
As shown in Fig. 1 ~ 2, it is preferred embodiment provided by the invention.
3D printing device 1 provided by the invention, be compounded with laser milling processing and electron beam melting, it may be used for shaping various part, as the part etc. needed for aeronautical manufacture industry.
Electron beam melting and laser milling compound 3D printing device 1 comprise pedestal 100, paving powder structure, electron beam emitting structural 101 and laser milling head 114, wherein, pedestal 100 is as the basis of whole 3D printing device 1, play carrying effect, pedestal 100 is provided with the processing platform 109 of vertically movement, and metal powder is laid on this processing platform 109; Paving powder vibrational power flow is on pedestal 100, and paving powder structure is used for metal powder etc. to be transported to processing platform 109, and metal powder forms metal bisque on processing platform 109; Electron beam emitting structural 101 is positioned at the top of processing platform 109, and its transmitting can at the electron beam of horizontal plane movement, and this electron beam is used for carrying out melt-processed to the metal bisque be formed on processing platform 109 is similar to body to form single or multiple lift; Laser milling head 114 is positioned at the top of processing platform 109, and it can Three-dimensional movable in space, and this laser milling head 114 can be similar to body to the single or multiple lift of melt molding on processing platform 109 and carry out Milling Process by Emission Lasers bundle.
With reference to shown in Fig. 1, the XY plane that setting is parallel to processing platform 109 is horizontal plane, Z-direction is then vertical direction, plane perpendicular to horizontal plane is perpendicular, like this, processing platform 109 can move up and down along Z-direction, and the electron beam that electron beam emitting structural 101 is launched is at XY planar movement, and laser milling head 114 can move in X, Y, Z-direction.
In above-mentioned electron beam melting and laser milling compound 3D printing device 1, the electron beam melting metal bisque adopting electron beam emitting structural 101 to launch carries out 3D printing, the laser beam utilizing laser milling head 114 to launch is similar to body to the single or multiple lift that electron beam emitting structural 101 is processed at every turn and carries out Milling Process, and fusion 3D printing technique and Milling Process are integrated.
In actual process, its specific operation process is as follows:
1), metal powder is delivered on processing platform 109, and is laid on processing platform 109, formation metal bisque by paving powder structure; According to 3D printing technique, electron beam emitting structural 101 divergent bundle, to the metal bisque melt-processed on processing platform 109, successively piles up the approximate body forming single or multiple lift line by line;
2), the laser beam that utilizes laser milling head 114 the to launch approximate body to the single or multiple lift that processing platform 109 is formed carries out milling, to reach size needed for component and surface accuracy;
3), repetitive cycling above-mentioned steps 1) and step 2), until the shape completion of processing of last part.
Complete above-mentioned steps 1 at every turn) and 2), processing platform 109 can move down certain distance, remains unchanged with the distance between the focus ensureing to rearrange the electron beam that metal bisque on processing platform 109 and electron beam emitting structural 101 are launched.In step 1) in, the electron beam utilizing electron beam emitting structural 101 to send moves at horizontal plane, and in the metal bisque on processing platform 109, shaping single or multiple lift is similar to body; In step 2) in, the laser beam utilizing laser milling head 114 to launch moves at solid space, can be similar to that body is comprehensive carries out milling to various types of single or multiple lift.
The electron beam melting utilizing the present embodiment to provide and laser milling compound 3D printing device 1 processing parts, utilize electron beam successively after motlten metal bisque, the laser beam utilizing laser milling head 114 to launch is similar to body to single or multiple lift and carries out Milling Process, be cycled to repeat until part completion of processing, this 3D printing device by traditional removal formula Precision Machining based on laser milling with print to main increment layered manufacturing technique with electron beam melting 3D and become one, the defect of traditional 3D printing technique in size and dimension precision etc. can be overcome, also the restriction of machining to aspects such as parts complexities can be overcome, like this, the part after to processing is not then needed to carry out secondary operations, avoid current clamping difficulty, mismachining tolerance is large, add man-hour part occur distortion and unmanageable problem, for 3D printing technique opens up more wide application space, for the manufacturing of aerospace industries core precision parts provides new ways and means.
In addition, the laser beam adopting laser milling head 114 to launch is similar to body to single or multiple lift and carries out Milling Process, belong to contactless Milling Process, being directly similar to body with single or multiple lift directly contacts the defect of processing and existing to avoid traditional type cutter, greatly improves the precision of Milling Process.
In the present embodiment, pedestal 100 is provided with the two rows parallel guide rail 105 arranged separately, and these two guide rails 105 are arranged in the both sides of processing platform 109; Paving powder structure comprises scraper 104 and storage powder case 103, the two ends of scraper 104 are movably connected on two guide rails 105 respectively, like this, scraper 104 can move in the horizontal plane along guide rail 105, and has gap between the lower surface of scraper 104 and processing platform 109; Storage powder case 103 has the powder storing chamber of upper end open, the powder storing chamber of storage powder case 103 is for storing metal powder, this storage powder case 103 is positioned at the below of pedestal 100, and in pedestal 100, be provided with the through hole being communicated with this storage powder case 103 upper end open, that is, through hole aligns with the upper end open of storage powder case 103, certainly, this through hole is also between two guide rails 105.
The fortune powder platform that can move up and down also is provided with in storage powder case 103, through hole alignment respectively in the upper end open of this fortune powder platform and storage powder case 103 and pedestal 100, like this, when scraper 104 needs to lay metal powder layer on processing platform 109, fortune powder platform carrys metal powder, and move up, be each passed through the upper end open of storage powder case 103 and the through hole of pedestal 100, until metal powder is emerging on pedestal 100, like this, utilize scraper 104 metal powder can be scraped on processing platform 109, form metal bisque, certainly, be formed in the thickness of the metal bisque on processing platform 109 at every turn, consistent with the gap of scraper 104 lower end and processing platform 109.
Like this, according to reality processing needs, then can select the thickness of the metal bisque be at every turn laid on processing platform 109, only need to adjust scraper 104, regulate the gap between scraper 104 lower end and processing platform 109 then can.
As preferred embodiment, in the present embodiment, paving powder structure includes two above-mentioned scrapers 104 and two above-mentioned storage powder casees 103, like this, the two ends of two scrapers 104 are movably connected on two guide rails 105 respectively, and two scrapers 104 are separately positioned on front end and the rear end of processing platform 109, like this, when utilizing scraper 104 to carry out paving powder, then can utilize the interactive operation of two scrapers 104, substantially increasing paving powder efficiency.
Or as other embodiment, in the present embodiment, paving powder structure can also be comprise above-mentioned scraper 104 and leak powder case, and this leakage powder case is positioned at the top of pedestal 100, is wherein provided with powder storing chamber, and metal powder is then stored in the powder storing chamber of this leakage powder case.Be provided with powder leakage hole in the lower end of leaking powder case, this powder leakage hole is communicated with and leaks powder chamber, and the metal powder leaked in powder chamber can be dropped on pedestal 100 by this powder leakage hole, and carries out paving powder by scraper 104 and operate, and is laid on by metal powder on processing platform 109, formation metal bisque.
Particularly, powder leakage hole is that strip extends layout, like this, ensures that the width being carried out the metal bisque after spreading powder by scraper 104 meets use needs.Generally, the width of length slightly larger than processing platform 109 of powder leakage hole is ensured.
Certainly, leaking the structure of powder from top to bottom for arranging Lou powder case realization, also can arrange two and leaking powder casees, laying respectively at front end and the rear end of the top of processing platform 109, and, coordinate two scrapers 104, realize interactive paving powder and operate.
In order to detect the thickness of the metal bisque be laid on processing platform 109, in the present embodiment, sensor 107 is respectively equipped with in the both sides of processing platform 109, this sensor 107 is for detecting the thickness of the metal bisque be laid on processing platform 109, the information that sensor 107 detects by feeding back to control centre, and then is regulated the gap between processing platform 109 and scraper 104 by control centre.
Particularly, in order to detect the thickness of metal bisque more accurately, the present embodiment, in the both sides of processing platform 109, the side along processing platform 109 extends, and is furnished with multiple above-mentioned sensor 107 respectively.
Electron beam emitting structural 101 comprises electron beam generator and coil, wherein, electron beam generator can divergent bundle, the magnetic field that its electron beam launched is formed by coil electricity, like this, by the adjustment to coil magnetic field, then can change the transmission path of electron beam, realize the movement of electron beam at horizontal plane, as required the shape need of the approximate body component of processing, the magnetic field of regulating winding generation accordingly, thus realize the skew of electron beam.
In order to realize that processing platform 109 moves up and down, lift motor 111 is connected with below above-mentioned processing platform 109, utilize the power drive of this lift motor 111, drive moving up and down of processing platform 109, after each paving powder structure lays layer of metal bisque on processing platform 109, hoistable platform then controlled working platform 109 declines fixed range, thus ensures that the distance that the focus of the electron beam that electron beam emitting structural 101 is launched drops on metal bisque is constant.
In the present embodiment, two guide rails 105 are provided with door frame 106, this door frame 106 comprises the spaced apart linking arm 1062 of two-phase and crossbeam 1061, the lower end of two linking arms 1062 is movably connected on two guide rails 105 respectively, and can move along guide rail 105, crossbeam 1061 is connected to the upper end of two linking arms 1062, and like this, 1061, crossbeam is in being arranged between two guide rails 105 across shape.Crossbeam 1061 is connected with mobile terminal 112, and this moves terminal 112 and can move along crossbeam 1061.
Above-mentioned mobile terminal is also connected with connecting plate 113, and this connecting plate 113 can move up and down by relative movement terminal, namely along vertical movement, moves along the Z direction.Laser milling head 114 is connected on this connecting plate 113, and like this, when connecting plate 113 is vertical movement, laser milling head 114 is also thereupon in vertical movement.
In such a configuration, crossbeam 1061 can move along two guide rails 105, namely move along the Y direction, mobile terminal 112 can move along crossbeam 1061, namely move along the X direction, connecting plate 113 moves up and down relative to connecting plate 113, namely moves along Z-direction, like this, 114, laser milling head can move at solid space.
In addition, cooling line 115 is provided with in laser milling head 114, in this cooling line 115, Cooling Water is communicated with, like this, by the cooling water that circulates in cooling line 115, then can utilize the flowing of cooling water, take away the heat produced in a component course of work in laser milling head 114, play the effect of heat radiation, ensure laser milling head 114 preferably operating efficiency and performance.
In the present embodiment, electron beam melting and laser milling compound 3D printing device 1 also comprise metal powder recovery structure, and this metal powder recovery structure is used for reclaiming pedestal 100 being processed remaining metal powder, like this, is then conducive to recycling of metal powder.
Particularly, metal powder recovery structure comprises collection box 110, be provided with the recycling cavity of the metal powder for accommodating recovery in this collection box 110, collection box 110 is positioned at the below of pedestal 100, in pedestal 100, be provided with recovery port, this recovery port is communicated with the recycling cavity of collection box 110, like this, pedestal 100 is processed remaining metal powder and then can enter in the recycling cavity of collection box 110 by recovery port, the metal powder in recycling cavity, carry out residue filtering, then can again recycle.
In the present embodiment, recovery port is arranged in the side of processing platform 109, certainly, moving direction when spreading powder along scraper 104, recovery port is arranged in the rear end of processing platform 109; Or two scrapers 104 are coordinated to the operation of interactive paving powder, recovery port can be separately positioned on front end and the rear end of processing platform 109; Or, as other embodiment, the both sides of the processing platform 109 that recovery port can be arranged.
In order to make electron beam melting and laser milling compound 3D printing device 1 in the process of processing, metal powder can not be oxidized, thus make the performance of shaping part better, in the present embodiment, electron beam melting and laser milling compound 3D printing device 1 also comprise Processing Room, in this Processing Room, there is processing space, and this processing space is vacuum state, or, inert gas is filled with in processing space, above-mentioned pedestal 100 is arranged in the processing space of Processing Room, namely electron beam melting and laser milling compound 3D printing device 1 device are in the processing space of Processing Room, like this, can reduce environment on metal melting or solidify time impact, improve machinery and the physical property of metal, for metal electron bundle melting 3D printing technique opens up more wide application space, the manufacturing for refractory metal provides new ways and means.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. electron beam melting and laser milling compound 3D printing device, it is characterized in that, comprise pedestal, described pedestal is provided with the processing platform of vertically movement; Described pedestal is provided with the paving powder structure forming metal bisque for metal powder being laid on described processing platform; The top of described processing platform is respectively equipped with electron beam emitting structural and can at the laser milling head of solid space movement; Described electron beam emitting structural divergent bundle carries out melt-processed to the metal bisque be positioned on described processing platform and is similar to body to form single or multiple lift; Described laser milling hair is penetrated laser beam and is similar to body to the single or multiple lift be formed on described processing platform and carries out Milling Process.
2. electron beam melting as claimed in claim 1 and laser milling compound 3D printing device, it is characterized in that, described pedestal is provided with two guide rails be arranged side by side separately, and described processing platform is described in two between guide rail; Described paving powder structure comprises scraper and Chu Fenxiang, and the two ends of described scraper are movably connected on guide rail described in two respectively, has gap between the lower end of described scraper and described processing platform; Described storage powder case has upper end open and for the powder storing chamber of device metal powder, is provided with the through hole alignd with the upper end open of described powder storing chamber in described pedestal; Be provided with vertical mobile and for metal powder being transported to the fortune powder platform on described pedestal in the powder storing chamber of described storage powder case, described fortune powder platform respectively with upper end open and the through hole alignment of described powder storing chamber.
3. electron beam melting as claimed in claim 1 and laser milling compound 3D printing device, it is characterized in that, described pedestal is provided with two guide rails be arranged side by side separately, and described processing platform is described in two between guide rail; Described paving powder structure comprises scraper and is positioned at the leakage powder case above described scraper, and the two ends of described scraper are movably connected on guide rail described in two respectively, have gap between the lower end of described scraper and described processing platform; Be provided with the powder storing chamber for device metal powder in described leakage powder case, the lower end of described leakage powder case is provided with powder leakage hole, and the upper end of described scraper is provided with the collection powder groove for collecting the metal powder fallen via described powder leakage hole.
4. electron beam melting as claimed in claim 3 and laser milling compound 3D printing device, it is characterized in that, described paving powder structure comprises two described scrapers and two described leakage powder casees, two described scrapers are respectively arranged with front end and the rear end of described processing platform, and two described leakage powder casees lay respectively at the top of two described scrapers.
5. the electron beam melting as described in any one of Claims 1-4 and laser milling compound 3D printing device, is characterized in that, the both sides of described processing platform are respectively equipped with the sensor for detecting the metal powder layer thickness be laid on described processing platform.
6. the electron beam melting as described in any one of Claims 1-4 and laser milling compound 3D printing device, it is characterized in that, described electron beam emitting structural comprises the electron beam generator of divergent bundle and the coil in energising generation magnetic field, the magnetic field that the electron beam that described electron beam generator is launched produces through described coil.
7. the electron beam melting as described in any one of Claims 1-4 and laser milling compound 3D printing device, it is characterized in that, two described guide rails are connected with door frame, described door frame comprises two linking arms and crossbeam arranged separately, the lower end of two described linking arms is movably connected on two described guide rails respectively, and the two ends of described crossbeam are connected to the upper end of two described linking arms; Described crossbeam is connected with the mobile terminal of cross beam movement, described mobile terminal is connected with the connecting plate moved up and down relative to described mobile terminal, described laser milling head is connected on described connecting plate.
8. the electron beam melting as described in any one of Claims 1-4 and laser milling compound 3D printing device, is characterized in that, is provided with the cooling line of Cooling Water circulation in described laser milling head.
9. the electron beam melting as described in any one of Claims 1-4 and laser milling compound 3D printing device, it is characterized in that, described electron beam melting and laser milling compound 3D printing device also comprise collection box, there is in described collection box the recycling cavity reclaiming metal powder on described pedestal for device, described collection box is positioned at the below of described pedestal, is provided with the recovery port being communicated with described recycling cavity in described pedestal.
10. the electron beam melting as described in any one of Claims 1-4 and laser milling compound 3D printing device, it is characterized in that, described electron beam melting and laser milling compound 3D printing device device are in the processing space of Processing Room, and the processing space of described Processing Room is vacuum shape or is filled with inert gas.
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| WO2016106603A1 (en) * | 2014-12-30 | 2016-07-07 | 深圳市圆梦精密技术研究院 | Electron beam melting and laser milling composite 3d printing apparatus |
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