CN109702319A - The online joining method of figure and system for big width laser processing - Google Patents
The online joining method of figure and system for big width laser processing Download PDFInfo
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- CN109702319A CN109702319A CN201910068953.4A CN201910068953A CN109702319A CN 109702319 A CN109702319 A CN 109702319A CN 201910068953 A CN201910068953 A CN 201910068953A CN 109702319 A CN109702319 A CN 109702319A
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Abstract
The present invention relates to a kind of online joining methods of figure and system for big width laser processing, to solve the problems, such as that existing online joining method splicing precision is difficult to meet processing request.Method obtains the center point coordinate of each sub-block figure and the minimum rectangular area comprising each sub-block figure the following steps are included: figure to be processed 1) is divided into N number of sub-block figure；2) open instruction light source, the light beam for issuing it reach X region to be processed, are scanned to the boundary in X region to be processed；3) coaxial measuring unit observation X region to be processed, and the image in X region to be processed is obtained, control unit obtains the practical bounding box in X region to be processed according to the image of acquisition；4) theoretical bounding box and practical bounding box are compared；5) position of the sub- block graphics of X in control unit is adjusted；6) graph scanning of X machining area is completed；7) step 2) is repeated to step 6).
Description
Technical field
The present invention relates to laser precision machining technologies, and in particular to it is a kind of for big width laser processing figure spell online
Connect method and system.
Background technique
With the extensive use of laser processing technology, the advantage of laser processing is also emerged from, and major advantage is non-connects
Processing, heat affecting is small, rapidoprint is extensive etc. is touched, due to the unique advantage of above-mentioned laser processing, in micro-nano processing
It plays an increasingly important role.As laser processing range is gradually expanded, precision to laser micro-machining technology and steady
It is qualitative to propose increasingly higher demands.
Laser scanning galvanometer has become laser due to having many advantages, such as that process velocity is fast, precision is high, environmental suitability is strong
The main devices of processing, and more and more apply in industries such as laser index carving, laser boring, 3D printing, laser cuttings.By
It is limited in the scanning range of laser scanning galvanometer, and with the expansion of scanning range, scanning accuracy can also reduce.Therefore,
In order to solve the laser scanning of substantially surface parts, the online splicing of galvanometer processing is widely used.
Online splicing is mainly the splicing for relying on the positioning of motion platform to realize large format figure at present, and principle is
Entirely processed figure is divided into N number of region according to the range of work of scanning galvanometer by algorithm, guarantees that each region can
Single pass is completed, and then workpiece or galvanometer are moved to each region to be processed respectively and realize whole picture figure by cooperative movement platform
Processing.Therefore, such joining method is completely dependent on the mobile accuracy of motion platform, in the micro-nano technology of high-quality, adds
The splicing precision of work figure is often difficult to meet processing request.
Summary of the invention
Present invention aim to address the mobile accuracies that existing online joining method is completely dependent on motion platform, in high-quality
Micro-nano technology in, the splicing precision of graphics processing is difficult the problem of meeting processing request, provides and a kind of swashs for large format
The online joining method of figure and system of light processing.
The technical scheme is that
A kind of online joining method of figure for big width laser processing, comprising the following steps:
1) control unit is loaded into figure to be processed, and figure to be processed is divided into N according to the range of work of scanning galvanometer
A sub- block graphics obtains the center point coordinate of each sub-block figure and the minimum rectangular area comprising each sub-block figure, should
Minimum rectangular area is theoretical bounding box；
2) according to the center point coordinate of sub-block figure, motion platform positions workpiece to be processed to X region to be processed,
Open instruction light source, the light beam for issuing it reach X region to be processed, sweep to the boundary in X region to be processed
It retouches；
3) coaxial measuring unit observation X region to be processed, and the image in X region to be processed is obtained, and should
Image transmitting to control unit, control unit obtains the practical bounding box in X region to be processed according to the image of acquisition；
4) theoretical bounding box and practical bounding box are compared, obtain the splicing translational movement △ in X region to be processed
X, △ Y and deflection angle theta；
5) splicing translational movement △ X, △ Y and the deflection angle theta obtained according to step 4) adjusts X height in control unit
The position of block graphics, until meeting the requirements；
6) laser is opened, acts on laser beam on the surface of workpiece to be processed, to complete X machining area
Graph scanning；
7) step 2) is repeated to step 6), up to work pieces process to be added and splices completion.
Further, the minimum rectangular area comprising each sub-block figure is obtained in step 1) specifically, comparing sub-block figure
Each apex coordinate of shape finds out the maximum value and minimum value of the X-coordinate and Y-coordinate in each vertex respectively, is pushed up according to four
Point determines that a rectangular area, the rectangular area are the minimum rectangular areas for surrounding this sub-block figure.
Further, in step 2), open instruction light source makes the light beam of its sending through the first reflecting mirror, scanning galvanometer, gathers
Burnt unit and the second reflecting mirror reach X region to be processed, are scanned to the boundary in X region to be processed.
Further, the coaxial measuring unit in step 3) is CCD camera.
Meanwhile the present invention also provides a kind of online splicing systems of figure for big width laser processing, including instruction light
Source, the first reflecting mirror, the second reflecting mirror, scanning galvanometer, focusing unit, coaxial measuring unit and control unit；The instruction light
The light that source issues enters scanning galvanometer after the reflection of the first reflecting mirror, the emergent light line focus unit of the scanning galvanometer focuses,
The boundary that machining area is treated after the reflection of second reflecting mirror is scanned；The coaxial measuring unit is arranged on the second reflecting mirror
Side, obtains the image in region to be processed, and the image that will acquire is sent to control unit.
Further, second reflecting mirror is spectroscope, and spectroscopical front plating dielectric reflection film, reverse side plating increases
Permeable membrane.
Further, first reflecting mirror is dichroscope.
Further, the laser uses near-infrared wavelength light source, and instruction light source uses red wavelength light source.
Further, the coaxial measuring unit is CCD camera.
Further, the focusing unit is field lens.
Compared with prior art, the present invention having following technical effect that
1. system and method for the present invention are based on piecemeal positioning, vision and the control system of motion platform to piecemeal graph position
On-line measurement and real time correction, realize the high-precision joining of substantially laser scanning pattern, therefore it is flat to be not only restricted to movement
The positioning accuracy of platform can guarantee the splicing precision of substantially figure laser scanning.
2. compared to existing method, it is flat to thus reduce movement for high accuracy positioning of the method for the present invention independent of platform
The performance indicator of the hardware such as platform has saved the splicing cost of large area image laser scanning.
Detailed description of the invention
Fig. 1 is figure online splicing system schematic diagram of the present invention for big width laser processing；
Figure to be processed is divided into N number of sub-block pictorial diagram for the present invention by Fig. 2；
Fig. 3 is theoretical bounding box and practical bounding box comparison schematic diagram in the method for the present invention.
Fig. 4 is present invention pictorial diagram one to be processed；
Fig. 5 is present invention pictorial diagram two to be processed；
Fig. 6 is present invention pictorial diagram three to be processed；
Fig. 7 is present invention pictorial diagram four to be processed.
Detailed description of the invention: 1- laser, the coaxial measuring unit of 2-, 3- instruction light source, the first reflecting mirror of 4-, 5- scanning galvanometer,
6- diffusing reflection light beam, the second reflecting mirror of 7-, 8- laser beam, 9- focusing unit, 10- workpiece to be processed, 11- motion platform, 12- control
Unit processed.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with the drawings and specific embodiments:
The present invention provides a kind of online joining method of figure and system for big width laser processing, by this method and
System ensure that the splicing precision of big width laser scanning patter, provide guarantee for the scanning of high-precision precise laser.
As shown in Figure 1, be used for the online splicing system of figure of big width laser processing includes that instruction light source 3, first is anti-
Penetrate mirror 4, the second reflecting mirror 7, scanning galvanometer 5, focusing unit 9, coaxial measuring unit 2 and control unit 12；Scanning galvanometer 5 passes through
Two reflecting optics built in it realize the deflection at any angle of light beam, realize light beam in workpiece surface any position with this
Scanning；The light beam that laser 1 issues is acted on workpiece surface by scanning galvanometer 5, focusing unit 9 and the second reflecting mirror 7.Refer to
Show that the outgoing beam of light source 3 enters scanning galvanometer 5, the emergent light of scanning galvanometer 5 after the first reflecting mirror 4 closes beam with laser beam
The boundary that machining area is treated after the focusing of line focus unit 9, the reflection of the second reflecting mirror 7 is scanned, and realizes regional edge to be processed
The physical location on boundary is demonstrated；Motion platform 11 is used to workpiece being moved to region to be processed to realize the blocked scan of laser；Together
Axis measuring unit 2 is arranged above the second reflecting mirror 7, and the image that obtains the image in region to be processed, and will acquire is sent to control
Unit 12 processed needs to measure coordinate system and processing for measuring practical bounding box, and in order to eliminate the error coaxially measured
Coordinate system, which is aligned, (on the basis of this sentences Cutter coordinate system, adjusts coaxial measuring unit 2 by the coincidence for realizing two coordinate systems
Position and angle, be overlapped with ensuring to measure coordinate system with Cutter coordinate system)；Control unit 12 is loaded into graphics processing, processing simultaneously
Correct practical bounding box and theory bounding box departure and rotation amount, under the modules such as motion platform 11 and scanning galvanometer 5
Send instructions etc., i.e., control unit 12 is flat with instruction light source 3, scanning galvanometer 5, focusing unit 9, coaxial measuring unit 2, movement
CCD camera specifically can be used in the connection such as platform 11, coaxial measuring unit 2, and laser pen, focusing unit 9 specifically can be used in instruction light source 3
Specially field lens.
The light source of laser 1 and the wavelength of instruction light source 3 should select different wavelength, as laser 1 uses near-infrared
Wavelength light source, instruction light source 3 use red wavelength light source.
Second reflecting mirror 7 of coaxial 2 lower section of measuring unit is spectroscope, which needs red to the instruction in this system
Light is split, and specifically can plate anti-reflection film to spectroscopical front plating dielectric reflection film, reverse side, setting realization in this way refers to
Show that light beam can either be scanned in workpiece surface and its light beam can be made to be observed by coaxial measuring unit.The of the lower section of laser 1
One reflecting mirror 4 is dichroscope, which can realize the high transmittance of laser infrared wavelength light source and instruction feux rouges in this case
High reflectance.
It is provided by the invention it is a kind of for big width laser processing the online joining method of figure the following steps are included:
1) as shown in Fig. 2, control unit 12 is loaded into figure to be processed, and will be to be added according to the range of work of scanning galvanometer 5
Work figure is divided into N number of sub-block figure, obtains the minimum rectangular area comprising each sub-block figure, which is reason
By bounding box；
Detailed process is as follows: a. control unit 12 is loaded into vector graphics to be processed；B. by figure to be processed according to scanning
The range of work of galvanometer 5 carries out subregion；C. control unit 12 saves each subregion figure and finds out the geometric center point of each region
The minimum rectangular area of coordinate and each piecemeal figure, the minimum rectangular area are theoretical bounding box；Figure to be processed can be with
The figure to be processed and fractionation mode being loaded into for arbitrary form, present embodiment are as shown in Figures 4 to 7；
Above-mentioned acquisition includes the minimum rectangular area of each sub-block figure specifically, each vertex for comparing sub-block figure is sat
Mark, finds out the maximum value and minimum value (x of the X-coordinate and Y-coordinate in each vertex respectivelymin,xmaxAnd ymin,ymax), according to
Four vertex determine that a rectangular area, the rectangular area are the minimum rectangular areas for surrounding this sub-block figure；
2) according to the center point coordinate of sub-block figure, motion platform 11 positions workpiece to be processed 10 to be processed to X
Region, open instruction light source 3, the light beam for issuing it reaches X region to be processed, to the boundary in X region to be processed
It is scanned；
Detailed process is open instruction light source 3, and the light beam for issuing it is single through the first reflecting mirror 4, scanning galvanometer 5, focusing
Member 9 and the second reflecting mirror 7 reach X region to be processed, are scanned to the boundary in X region to be processed；
3) coaxial measuring unit 2 observes the diffusing reflection light beam 6 in X region to be processed, obtains X region to be processed
Image, and by the image transmitting to control unit 12, control unit 12 obtains X region to be processed according to the image of acquisition
Practical bounding box；
Specially control unit 12 carries out image grayscale identification, and the image pixel that will be recognized according to the image got
It is converted into geometric dimension, and then gets Xmax, Xmin and the Ymax of the image, thus Ymin finally obtains the processing district
The practical bounding box in domain；
4) the practical encirclement box position of X machining area in step 2 and the Region Theory are surrounded using control unit 12
The position of box is compared, and the frame midpoint for choosing bounding box in the present embodiment is benchmark, calculates separately to obtain to be added
Splicing translational movement △ X, △ Y and the deflection angle theta of work figure, as shown in Figure 3；
5) splicing translational movement △ X, △ Y and the deflection angle theta obtained according to step 4) adjusts X in control unit 12
Position of the sub-block figure in Cutter coordinate system, until meeting the requirements；The adjusting range is needed according to specific splicing required precision,
Such as: splicing precision is 0.02mm, then needs to be adjusted within the scope of 0.02mm；
6) laser 1 is opened, so that outgoing beam is penetrated the first reflecting mirror 4 for being coated with transmissive film, then pass through scanning galvanometer
5, after focusing unit 9 and the second reflecting mirror 7 are to the beat of light beam, focusing, reflex, laser beam 8 is made to act on workpiece
On surface, to complete the graph scanning of X machining area；
7) step 2) is repeated to step 6), up to work pieces process to be added and splices completion.
Claims (10)
1. a kind of online joining method of figure for big width laser processing, which comprises the following steps:
1) control unit is loaded into figure to be processed, and figure to be processed is divided into N number of son according to the range of work of scanning galvanometer
Block graphics obtains the center point coordinate of each sub-block figure and the minimum rectangular area comprising each sub-block figure, the minimum
Rectangular area is theoretical bounding box；
2) according to the center point coordinate of sub-block figure, workpiece to be processed is positioned to X region to be processed, is opened by motion platform
Indicate light source, the light beam for issuing it reaches X region to be processed, is scanned to the boundary in X region to be processed；
3) coaxial measuring unit observation X region to be processed, and obtain the image in X region to be processed, and by the image
It is transmitted to control unit, control unit obtains the practical bounding box in X region to be processed according to the image of acquisition；
4) theoretical bounding box and practical bounding box are compared, obtain splicing translational movement △ X, the △ Y in X region to be processed
And deflection angle theta；
5) splicing translational movement △ X, △ Y and the deflection angle theta obtained according to step 4) adjusts X sub-block figure in control unit
The position of shape, until meeting the requirements；
6) laser is opened, acts on laser beam on the surface of workpiece to be processed, to complete the figure of X machining area
Scanning；
7) step 2) is repeated to step 6), up to work pieces process to be added and splices completion.
2. the figure online joining method according to claim 1 for big width laser processing, it is characterised in that: step
1) minimum rectangular area comprising each sub-block figure is obtained in specifically, comparing each apex coordinate of sub-block figure, respectively
The maximum value and minimum value for finding out the X-coordinate and Y-coordinate in each vertex determine a rectangular area according to four vertex, should
Rectangular area is the minimum rectangular area for surrounding this sub-block figure.
3. the figure online joining method according to claim 2 for big width laser processing, it is characterised in that: step
2) in, open instruction light source, the light beam for issuing it is through the first reflecting mirror, scanning galvanometer, focusing unit and the second reflecting mirror
X region to be processed is reached, the boundary in X region to be processed is scanned.
4. the figure online joining method according to claim 1 or 2 or 3 for big width laser processing, feature exist
In: the coaxial measuring unit in step 3) is CCD camera.
5. a kind of online splicing system of figure for big width laser processing, it is characterised in that: including instruction light source (3), the
One reflecting mirror (4), the second reflecting mirror (7), scanning galvanometer (5), focusing unit (9), coaxial measuring unit (2) and control unit
(12)；
The light that instruction light source (3) issues enters scanning galvanometer (5) after the first reflecting mirror (4) reflection, the scanning galvanometer
(5) machining area is treated in emergent light line focus unit (9) focusing, the second reflecting mirror (7) boundary after reflecting is scanned；
Coaxial measuring unit (2) setting obtains the image in region to be processed, and will acquire above the second reflecting mirror (7)
Image be sent to control unit (12).
6. the figure online splicing system according to claim 5 for big width laser processing, it is characterised in that: described
Second reflecting mirror (7) is spectroscope, and spectroscopical front plating dielectric reflection film, reverse side plates anti-reflection film.
7. the figure online splicing system according to claim 5 or 6 for big width laser processing, it is characterised in that:
First reflecting mirror (4) is dichroscope.
8. the figure online splicing system according to claim 7 for big width laser processing, it is characterised in that: described
Indicate that light source (3) use red wavelength light source, laser (1) uses near-infrared wavelength light source.
9. the figure online splicing system according to claim 8 for big width laser processing, it is characterised in that: described
Coaxial measuring unit (2) is CCD camera.
10. the figure online splicing system according to claim 9 for big width laser processing, it is characterised in that: institute
Stating focusing unit (9) is field lens.
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| CN110090956A (en) * | 2019-05-21 | 2019-08-06 | 北京易加三维科技有限公司 | The quick joining method of the more laser of SLM device |
| CN110421253A (en) * | 2019-07-22 | 2019-11-08 | 廊坊西波尔钻石技术有限公司 | Laser scanning system and laser engraving system with it |
| CN110695523A (en) * | 2019-06-19 | 2020-01-17 | 西安中科微精光子制造科技有限公司 | Laser scanning device |
| CN110977154A (en) * | 2019-12-05 | 2020-04-10 | 苏州领鹿智能科技有限公司 | Positioning marking method suitable for large breadth |
| CN111618442A (en) * | 2020-04-28 | 2020-09-04 | 深圳市东赢激光设备有限公司 | Method for splicing and cutting large-width thick glass by vibrating mirror type laser |
| CN113358068A (en) * | 2021-04-26 | 2021-09-07 | 福建数博讯信息科技有限公司 | Floor type scaffold correcting method and device |
| CN113924184A (en) * | 2019-06-07 | 2022-01-11 | 百超激光有限公司 | Machining device for laser machining a workpiece and method for laser machining a workpiece |
| CN116038155A (en) * | 2023-03-17 | 2023-05-02 | 深圳市睿达科技有限公司 | System and method for splicing and cutting super-breadth non-deformable material by laser cutting |
| CN117066724A (en) * | 2023-10-16 | 2023-11-17 | 济南邦德激光股份有限公司 | Method, device and equipment for rapidly cutting part processing graph |
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