CN106003714B - More galvanometer scaling methods, Method of printing and the optical system that 3D printing uses - Google Patents
More galvanometer scaling methods, Method of printing and the optical system that 3D printing uses Download PDFInfo
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- CN106003714B CN106003714B CN201610362376.6A CN201610362376A CN106003714B CN 106003714 B CN106003714 B CN 106003714B CN 201610362376 A CN201610362376 A CN 201610362376A CN 106003714 B CN106003714 B CN 106003714B
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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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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Abstract
The present invention provides more galvanometer scaling methods, more galvanometer Method of printings and the optical system that a kind of 3D printing uses, and more galvanometer scaling methods comprise the following steps：1）Individually each galvanometer is demarcated, obtains the respective demarcating file of each galvanometer；2）Above-mentioned demarcating file is loaded onto in corresponding galvanometer, printing forms one group of dot matrix to all galvanometers on same test paper respectively；3）Galvanometer on the basis of one of galvanometer is set, using the dot matrix that benchmark galvanometer prints on test paper as benchmark dot matrix, calculate dot matrix and the interlattice deviation collection of benchmark that other galvanometers are printed, deviation demarcating file of the deviation collection as other galvanometers, deviation demarcating file is loaded onto in each corresponding galvanometer, for wanting the pretreatment of printing path vector to corresponding galvanometer, the mutual calibration of multiple galvanometers is so far completed.The present invention improves printing effect.
Description
Technical field
It is a kind of used more particularly to 3D printing more galvanometer scaling methods, more the present invention relates to 3D printing technique field
Galvanometer Method of printing and optical system.
Background technology
3D printing equipment based on laser formation (is melted including Stereo Lithography SLA, selective laser sintering SLS, selective laser
Change SLM), for light path usually by a laser, a dynamic expands focus lamp (or beam expanding lens adds F-Theta mirrors) and a galvanometer
Composition.Laser in print procedure by galvanometer is irradiated to the different position of machined surface, (cures, burn so as to fulfill different modes
Knot or fusing) processing.Sweep time directly influences the processing efficiency of 3D printing equipment during 3D printing.But it is excited
The objective limitations such as light device power, galvanometer deflection speed, technological requirement, cause scan rate of vibrating mirror that cannot unlimitedly accelerate.
To improve 3D printing efficiency, 3D printing is carried out in the form of more vibration mirror scannings at present.Such as Chinese patent
201210397870.8 a kind of more galvanometer head etching laser machinings are disclosed；Chinese patent 201310024479.8 discloses a kind of more galvanometers
Large format selective laser melting SLM device；Chinese patent 201420817079.2 discloses a kind of double galvanometer multiple plate switchings and swashs
Photoengraving machine and Chinese patent 201520694346.6 disclose a kind of mirror-vibrating laser scanning large format material forming processing control
System processed.Above-mentioned each patent is all mentioned in the form of more vibration mirror scannings improving printing effect, but how to make multiple galvanometers
Between how to be demarcated between better cooperative cooperating and galvanometer, these technical problems do not refer to.
The content of the invention
In view of the foregoing deficiencies of prior art, it is an object of the invention to provide more galvanometers that a kind of 3D printing uses
Scaling method, more galvanometer Method of printings and optical system, for what is do not demarcated mutually between solution in the prior art multiple galvanometers
Problem.
In order to achieve the above objects and other related objects, the present invention provides more galvanometer calibration sides that a kind of 3D printing uses
Method comprises the following steps：
1) individually each galvanometer is demarcated, obtains the respective demarcating file of each galvanometer；
2) demarcating file is loaded onto in corresponding galvanometer, all galvanometers print shape on same test paper respectively
Into one group of dot matrix；
3) galvanometer on the basis of one of galvanometer is set, the dot matrix that benchmark galvanometer is printed on the test paper
As benchmark dot matrix, dot matrix and the interlattice deviation collection of the benchmark that other galvanometers are printed are calculated, deviation collection is as other
The deviation demarcating file of galvanometer, deviation demarcating file are loaded onto in each corresponding galvanometer, for wanting print path to corresponding galvanometer
The mutual calibration of multiple galvanometers is so far completed in the pretreatment of radius vector.
Preferably, the test paper is optics printing paper or blank sheet of paper.
Preferably, more galvanometer scaling methods use two galvanometers, and one of galvanometer is as benchmark galvanometer.
The present invention also provides more galvanometer Method of printings that a kind of 3D printing uses, more galvanometer Method of printings include following
Step：
A, all galvanometers are demarcated using more galvanometer scaling methods as described above；
B, load the corresponding demarcating file of each galvanometer and other galvanometers in addition to benchmark galvanometer are loaded respective
Corresponding deviation demarcating file；
C, the corresponding default printing path vector of each galvanometer is inputted into each galvanometer；Other galvanometers in addition to benchmark galvanometer
Default printing path vector is pre-processed according to corresponding deviation demarcating file, draw actual printing path to
Amount；
D, 3D printing is started, all galvanometers scan simultaneously, until part printing is completed.
Preferably, in the step C, before the actual printing path vector is drawn, also need to the default print path
Two vertex of radius vector carry out cubic B-spline surface interpolation calculating, are pre-processed further according to the deviation demarcating file.
Preferably, in the step C, the setting method of the corresponding default printing path vector of each galvanometer is：It to be beaten
Print part is when being made of side by side multiple small parts, the corresponding print area of all small parts is divided into according to position distribution it is multigroup,
And group number is equal with the quantity of galvanometer used, default printing path vector of the every group of corresponding print area as a galvanometer.
Preferably, in the step C, the setting method of the corresponding default printing path vector of each galvanometer is：It to be beaten
When to print part be large area part, the benchmark galvanometer is distributed into the printing of the profile of large area part, large area part it is interior
Portion's filling region prints completion jointly by all galvanometers.
The present invention also provides the optical system that a kind of 3D printing uses, for completing more galvanometer printing sides as described above
Method, the optical system include multigroup light path system, and every group of light path system includes a laser, a beam expanding lens, a field
Mirror and a galvanometer, all light path systems are arranged side by side.
Preferably, all galvanometers are arranged side by side, and the center spacing of adjacent galvanometer is 50-500mm.
The present invention also provides the optical system that a kind of 3D printing uses, for completing more galvanometer printing sides as described above
Method, the optical system include a laser and multiple galvanometers, and each galvanometer corresponds to a beam expanding lens and field lens, the laser
The light path that device projects is after spectroscope is divided into each galvanometer.
As described above, more galvanometer scaling methods, more galvanometer Method of printings and optical system that the 3D printing of the present invention uses
System, has the advantages that：More galvanometer scaling methods that the 3D printing of the present invention uses realize mutual between multiple galvanometers
Calibration, to realize multiple galvanometers while print to improve printing effect；In addition, more galvanometer Method of printings using the present invention ensure
Multiple galvanometers seamless connections in printing, it is ensured that the part that more galvanometers print do not spell trace.
Description of the drawings
The flow chart for more galvanometer scaling methods that the 3D printing that Fig. 1 is shown as the present invention uses.
Fig. 2 is shown as the flow chart of more galvanometer Method of printings of the present invention.
Fig. 3 is shown as the flow chart of single galvanometer scaling method.
Fig. 4 is shown as the first embodiment schematic diagram for the part of being printed.
Fig. 5 is shown as the second embodiment schematic diagram for the part of being printed.
The one of the optical system that the 3D printing that Fig. 6 is shown as the present invention uses implements illustration.
Another implementation illustration for the optical system that the 3D printing that Fig. 7 is shown as the present invention uses.
Fig. 8 is shown as double galvanometer print area schematic diagrames.
Component label instructions
1 laser
2 speculums
3 galvanometers
4 beam expanding lens
5 field lenses
6 spectroscopes
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
It please refers to Fig.1 to Fig. 8.It should be clear that structure, ratio, size depicted in this specification institute attached drawing etc., only to
Coordinate the revealed content of specification, so that those skilled in the art understands and reads, being not limited to the present invention can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of present invention can be generated and the purpose that can reach, should all still fall in disclosed skill
In the range of art content can cover.Meanwhile in this specification it is cited as " on ", " under ", "left", "right", " centre " and
The term of " one " etc. is merely convenient to understanding rather than to limit the enforceable scope of the present invention for narration, relativeness
It is altered or modified, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the present invention.
As shown in Figure 1, the present invention provides more galvanometer scaling methods that a kind of 3D printing uses, comprise the following steps：
1) individually each galvanometer is demarcated, obtains the respective demarcating file of each galvanometer；
2) control software for controlling all galvanometers is opened, above-mentioned demarcating file is loaded onto in corresponding galvanometer, Suo Youzhen
Printing forms one group of dot matrix to mirror on same test paper respectively；Test paper in the present embodiment is optics printing paper, or
Blank sheet of paper；Dot matrix is cross, and different dot matrix is represented by cross of different sizes to distinguish；
3) by one of galvanometer set on the basis of galvanometer, using the dot matrix that benchmark galvanometer prints on test paper as
Benchmark dot matrix calculates dot matrix and the interlattice deviation collection of benchmark that other galvanometers are printed, and deviation collection is as the inclined of other galvanometers
Poor demarcating file, deviation demarcating file are loaded onto in each corresponding galvanometer, for wanting printing path vector to corresponding galvanometer
Pretreatment, so far completes the mutual calibration of multiple galvanometers.
The splicing between galvanometer is that using the difficult point of more vibration mirror scannings maximum in 3D printing, due to single galvanometer calibration result
Inexactness, error is amplified when causing the multiple galvanometers to splice, so just needing to re-start calibration to more galvanometer systems；This
More galvanometer scaling methods of invention, are used as benchmark galvanometer by setting a galvanometer, other galvanometers are come on the basis of the galvanometer
It is demarcated, calibration process repeatedly, to realize the cooperative cooperating of all galvanometers, makes the printing unifying datum of all galvanometers,
Ensure print quality while improving printing effect.
Single galvanometer needs a calibration process of itself after installation is complete.The purpose of calibration is to reduce because of light path
Scan image deformation etc. caused by barrel-shaped or pincushion effect that scan image caused by system is likely to form and installation error etc.
Problem.Calibration result is related with calibration algorithm, calibration mode and calibration number, and even needing repeatedly calibration that could meet sometimes will
It asks.Above-mentioned steps 1 in the present embodiment) in each galvanometer demarcating file generation step it is as follows：As shown in Figure 3,
A opens the calibration control program of galvanometer itself and loads the initial alignment file that galvanometer carries；
B print points on fiducial mark fixed board, and judge whether printed point weighs with the datum mark on fiducial mark fixed board
It closes, the calibration of next step is carried out if misaligned, initial alignment file is the demarcating file of the galvanometer if overlapping；
C then exports the actual deviation file of all print points, by initial alignment file and actual deviation if necessary to demarcate
File inputs the calibrated and calculated program of galvanometer itself jointly, draws the new demarcating file of galvanometer；
New demarcating file is loaded onto in the calibration control program of galvanometer by d, step b-c is repeated, until print point and base
It overlaps on schedule, draws the demarcating file of galvanometer.
More galvanometer scaling methods of the present embodiment use two galvanometers, one of galvanometer as benchmark galvanometer, another
Galvanometer is demarcated using above-mentioned scaling method.
The present invention also provides more galvanometer Method of printings that a kind of 3D printing uses, as shown in Fig. 2, more galvanometer Method of printing bags
Include following steps：
A, all galvanometers are demarcated using more galvanometer scaling methods as described above；
B, the control software for controlling all galvanometers is opened, loads the corresponding demarcating file of each galvanometer and to removing
Other galvanometers outside benchmark galvanometer load corresponding deviation demarcating file；
C, the corresponding default printing path vector of each galvanometer is inputted into each galvanometer；Other galvanometers in addition to benchmark galvanometer
Default printing path vector is pre-processed according to corresponding deviation demarcating file, draw actual printing path to
Amount；
D, 3D printing is started, all galvanometers scan simultaneously, until part printing is completed.
The present invention uses above-mentioned more galvanometer scaling methods, and all galvanometers are demarcated, are printed again after calibration, improves
Printing effect and print quality.
In above-mentioned steps C, the present embodiment is also needed before above-mentioned actual printing path vector is drawn to presetting printing path
Two vertex of vector carry out cubic B-spline surface interpolation calculating, are pre-processed further according to the deviation demarcating file.
Cubic B-spline surface interpolation equation is：
V'(u, w)=V (u, w)+P (u, w)
Wherein, V (u, w) is point coordinates before interpolation, V'(u, w) for the point coordinates after interpolation,
For the mathematic(al) representation of B-spline surface.
Fi,m(u)Fj,n(w) it is B-spline basic function, Fi,m(u)Fj,n(w) mathematic formula is：
In above-mentioned steps C, the setting method of the corresponding default printing path vector of each galvanometer is：The part of being printed by
When multiple small parts are formed side by side, the corresponding print area of all small parts is divided into according to position distribution it is multigroup, and organize number with
The quantity of galvanometer used is equal, default printing path vector of the every group of corresponding print area as a galvanometer.See Fig. 4 institutes
Showing, the part of printing is made of multiple small parts required for the present embodiment, and the present embodiment completes scanning and printing using two galvanometers,
Will all small parts be divided into two groups, one group for shown in the solid box in Fig. 4, one group for shown in the dotted line frame in Fig. 4, by solid line
The small part group of frame is printed by a vibration mirror scanning, and the small part group of dotted line frame is printed by another vibration mirror scanning, the present embodiment
For the big part that is made of multiple small parts of printing, using the pattern of grouping, using each galvanometer, individually one group of printing is realized
The printing of big part, printing effect is improved with this.
In above-mentioned steps C, the setting method of the corresponding default printing path vector of each galvanometer can also be：It to be printed
When part is large area part, the benchmark galvanometer, the inside of large area part are distributed into the profile printing of large area part
Filling region prints completion jointly by all galvanometers.The part to be printed as shown in Figure 5 is large area one-piece parts, by two
When vibration mirror scanning prints, then outline portion represented by the oblique line item in Fig. 5 is printed by benchmark galvanometer, and the grid in Fig. 5 is filled out
The inside filling region for filling the i.e. part in part is completed jointly by two galvanometers.The present embodiment is beaten for large area one-piece parts
Print prints profile using benchmark galvanometer, and internal filling region is printed by all galvanometers, while printing effect is improved, is protected
Demonstrate,prove print quality.
The present invention also provides the optical system that a kind of 3D printing uses, for completing more galvanometer printing sides as described above
Method, as shown in Figure 6, optical system include multigroup light path system, and every group of light path system includes 1, beam expanding lens of a laser
4th, a field lens 5 and a galvanometer 3, all light path systems are arranged side by side.All galvanometers 3 are arranged side by side.The present embodiment uses
Multiple lasers correspond to the mode of multiple galvanometers, realize the printing of more galvanometers, in a particular application, using using region as 600x
Exemplified by 450, the center spacing of adjacent galvanometer is 50-500mm, it is preferable that two galvanometer center spacing are 100-200mm.
As shown in figure 8, a-quadrant is the scanning area of a galvanometer in figure, B area is the scanning area of another galvanometer,
The region that centre is filled by grid is the effective coverage of two galvanometer common scans, the effective coverage, that is, above-mentioned using region
600x 450。
The present invention also provides the optical system that a kind of 3D printing uses, for completing more galvanometer printing sides as described above
Method, as shown in fig. 7, above-mentioned optical system includes a laser 1 and multiple galvanometers 3, each galvanometer 3 corresponds to a beam expanding lens 4
With field lens 5, into each galvanometer 3 after the light splitting of spectroscope 6, the light path after light splitting enters shakes the light path that the laser 1 projects
It can be reflected before mirror through speculum 2.The present embodiment reduces printing device in a manner that a laser corresponds to multiple galvanometers
Cost.
In conclusion more galvanometer scaling methods, more galvanometer Method of printings and optical system that the 3D printing of the present invention uses
System, more galvanometer scaling methods realize the mutual calibration between multiple galvanometers, to realize multiple galvanometers while print to improve printing
Efficiency；In addition, more galvanometer Method of printings using the present invention ensure that the seamless connection in printing of multiple galvanometers, it is ensured that more galvanometers
The part printed does not spell trace.So the present invention effectively overcomes various shortcoming of the prior art and has high industrial profit
With value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (6)
1. a kind of more galvanometer Method of printings that 3D printing uses, it is characterised in that：More galvanometer Method of printings include following step
Suddenly：
A, all galvanometers are demarcated using more galvanometer scaling methods；Wherein, more galvanometer scaling methods comprise the following steps：
1）Individually each galvanometer is demarcated, obtains the respective demarcating file of each galvanometer；
2）The demarcating file is loaded onto in corresponding galvanometer, printing forms one to all galvanometers on same test paper respectively
Group dot matrix；
3）By one of galvanometer set on the basis of galvanometer, using the dot matrix that benchmark galvanometer prints on the test paper as
Benchmark dot matrix calculates dot matrix and the interlattice deviation collection of the benchmark that other galvanometers are printed, and deviation collection is as other galvanometers
Deviation demarcating file, deviation demarcating file is loaded onto in each corresponding galvanometer, for corresponding galvanometer is wanted printing path to
The mutual calibration of multiple galvanometers is so far completed in the pretreatment of amount；
B, load the corresponding demarcating file of each galvanometer and other galvanometers loading in addition to benchmark galvanometer is each corresponded to
Deviation demarcating file；
C, the corresponding default printing path vector of each galvanometer is inputted into each galvanometer；Other galvanometers in addition to benchmark galvanometer according to
Corresponding deviation demarcating file pre-processes default printing path vector, draws actual printing path vector；
Before the actual printing path vector is drawn, also need to carry out cubic B-spline to two vertex of the default printing path vector
Surface interpolation calculates, and is pre-processed further according to the deviation demarcating file；
D, 3D printing is started, all galvanometers scan simultaneously, until part printing is completed.
2. more galvanometer Method of printings that 3D printing according to claim 1 uses, it is characterised in that：In the step C, often
The setting method of the corresponding default printing path vector of a galvanometer is：When the part of being printed is made of side by side multiple small parts,
The corresponding print area of all small parts is divided into according to position distribution multigroup, and it is equal with the quantity of galvanometer used to organize number, often
Default printing path vector of the corresponding print area of group as a galvanometer.
3. more galvanometer Method of printings that 3D printing according to claim 1 uses, it is characterised in that：In the step C, often
The setting method of the corresponding default printing path vector of a galvanometer is：When the part of being printed is large area part, by large area
The benchmark galvanometer is distributed in the profile printing of part, and the inside filling region of large area part has been printed jointly by all galvanometers
Into.
4. a kind of optical system that 3D printing uses, for completing more galvanometer Method of printings as described in claim 1, feature
It is：The optical system includes multigroup light path system, every group of light path system include a laser, a beam expanding lens, one
Field lens and a galvanometer, all light path systems are arranged side by side.
5. the optical system that 3D printing according to claim 4 uses, it is characterised in that：All galvanometers are set side by side
It puts, and the center spacing of adjacent galvanometer is 50-500mm.
6. a kind of optical system that 3D printing uses, for completing more galvanometer Method of printings as described in claim 1, feature
It is：The optical system includes a laser and multiple galvanometers, and each galvanometer corresponds to a beam expanding lens and field lens, described to swash
The light path that light device projects is after spectroscope is divided into each galvanometer.
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| CN106956430B (en) * | 2017-03-29 | 2019-07-30 | 深圳市大业激光成型技术有限公司 | Its 3D printer system of a kind of calibrating installation of galvanometer scanning system and application |
| CN108262952B (en) * | 2017-09-15 | 2020-06-02 | 杭州先临三维科技股份有限公司 | DLP three-dimensional printer and printing method thereof |
| CN108262953B (en) * | 2017-09-15 | 2020-06-02 | 杭州先临三维科技股份有限公司 | DLP three-dimensional printer and calibration method of projector thereof |
| CN108278966A (en) * | 2017-10-19 | 2018-07-13 | 杭州先临易加三维科技有限公司 | SLA precision calibrations system and scaling method |
| CN108058387B (en) * | 2017-12-12 | 2019-12-20 | 共享智能装备有限公司 | Planning method of FDM printing path |
| CN109877319B (en) * | 2018-12-29 | 2021-11-23 | 西安铂力特增材技术股份有限公司 | Multi-galvanometer laser precision splicing calibration method |
| CN109773332B (en) * | 2018-12-29 | 2021-04-27 | 大族激光科技产业集团股份有限公司 | Multi-galvanometer system correction method and multi-galvanometer correction system |
| CN112705840B (en) * | 2019-10-24 | 2023-07-21 | 大族激光科技产业集团股份有限公司 | Laser processing method and device |
| CN112170839A (en) * | 2020-09-17 | 2021-01-05 | 西安铂力特增材技术股份有限公司 | Efficient multi-laser printing method |
| CN112414674A (en) * | 2020-10-20 | 2021-02-26 | 天津镭明激光科技有限公司 | Rapid processing method for multi-galvanometer laser splicing calibration |
| CN112404741A (en) * | 2020-11-30 | 2021-02-26 | 苏州领鹿智能科技有限公司 | Vibrating mirror calibration method for double-sided marking and double-sided marking method for plate-shaped object |
| CN114536772B (en) * | 2022-04-21 | 2022-07-12 | 南京铖联激光科技有限公司 | Intelligent partition control system in 3D printing system and control method thereof |
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| JP3412278B2 (en) * | 1994-09-20 | 2003-06-03 | 株式会社日立製作所 | Stereolithography device and method |
| JPH0910967A (en) * | 1995-06-22 | 1997-01-14 | Hitachi Ltd | Optical molding device |
| JP5301217B2 (en) * | 2008-08-22 | 2013-09-25 | パナソニック株式会社 | Manufacturing method and manufacturing apparatus for three-dimensional shaped object |
| CN103552244B (en) * | 2013-11-04 | 2016-06-08 | 北京工业大学 | 3D laser print apparatus based on multi-laser scanning system |
| CN104475970B (en) * | 2014-12-01 | 2016-06-29 | 大族激光科技产业集团股份有限公司 | A kind of bearing calibration of laser equipment and laser scanning galvanometer array |
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