CN106003726A - Intelligent laser 3D printing device and method - Google Patents
Intelligent laser 3D printing device and method Download PDFInfo
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- CN106003726A CN106003726A CN201610509272.3A CN201610509272A CN106003726A CN 106003726 A CN106003726 A CN 106003726A CN 201610509272 A CN201610509272 A CN 201610509272A CN 106003726 A CN106003726 A CN 106003726A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000010146 3D printing Methods 0.000 title claims abstract description 29
- 239000004065 semiconductor Substances 0.000 claims abstract description 28
- 238000007639 printing Methods 0.000 claims abstract description 25
- 230000007547 defect Effects 0.000 claims abstract description 12
- 238000005253 cladding Methods 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000009659 non-destructive testing Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 2
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 230000008439 repair process Effects 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 238000010408 sweeping Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 22
- 238000005516 engineering process Methods 0.000 abstract description 15
- 238000003384 imaging method Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000000654 additive Substances 0.000 abstract description 2
- 230000000996 additive effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 102100034581 Dihydroorotase Human genes 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000011960 computer-aided design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
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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
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
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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
-
- 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
-
- 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
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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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses an intelligent laser 3D printing device and method, and belongs to the technical fields of intelligent manufacturing and additive manufacturing. The intelligent laser 3D printing device comprises an outer shell, a semiconductor laser, a computer, a workpiece stage, a drive motor, a galvanometer X, a galvanometer Y, a scanning mirror X, a scanning mirror Y, a field lens, a molten pool and two CCD cameras; by utilization of a laser 3D imaging technology, 3D scanning imaging is performed on an entity object subjected to laser 3D printing, thereby achieving CAD modeling of the 3D entity object; and by utilization of a laser photoacoustic technology, internal defects of the entity object subjected to laser 3D printing are detected, thereby detecting the quality of the entity object subjected to laser 3D printing online in real time. According to the intelligent laser 3D printing method, the CAD modeling, rapid prototyping, and internal defect detecting functions of the entity object subjected to laser 3D printing are achieved by utilizing the same laser source, so that laser 3D printing equipment can be systematized and intelligentized. Therefore, the intelligent laser 3D printing device disclosed by the invention has the advantages of being convenient and rapid in printing, high in prototyping quality, high in intelligent degree, simple in structure, reliable in running, and the like.
Description
Technical field
The invention belongs to Intelligent Manufacturing Technology and increase material manufacturing technology field, being specifically related to a kind of intelligent laser 3D and print
Device and Method of printing.
Background technology
Laser fast shaping (Laser Rapid Prototyping, LRP) technology is as increasing material manufacture (Additive
Manufacturing, AM) one of the important means of technology, its ultimate principle is " discrete-to pile up " processing technique, first by zero
Part computer-aided design (Computer Aided Design, CAD) model is discrete, then by successively increasing material, thus
Obtain the process of 3D solid object.This brand-new manufacture method be integrated with CAD/CAM (computer aided manufacturing,
Computer Aided Manufacturing, CAM) technology, laser and material science, reverse Engineering Technology, Layered manufacturing skill
The technology such as art, breach tradition and subtract cutter, the constraint of fixture in material manufacture or plasticity manufacture method, can be in a short period of time
Directly produce the model even finished product of product, greatly change life and the manufacture of modern society.
Laser fast forming has compared with classical production process: the replicability of prototype, interchangeability are high；Manufacturing process and system
The geometry making prototype is unrelated；Process-cycle is short, low cost, and general manufacturing expense reduces by 50%, and the process-cycle shortens 70%
Above；Highly Integration ofTechnology, it is achieved integrated manufacturing system (IMS).This technology be widely used in Aero-Space, national defense and military,
The every field such as energy source and power, optoelectronic information, medical treatment, along with the development of industry, the industry-by-industry demand to laser equipment
Also improving constantly, especially for laser manufacture equipment more efficient, more freedom, finer, more intelligent particularly close
Note.Such as patent modular laser 3D printer (application number 201610006650.6), its object is to realize good stability, printing
The laser 3D printer that speed is fast, printing precision is high；A kind of cloud manufacturing service system (application number based on 3D printer
201510863252.1), its object is to realize cloud manufacture in 3D printer share, improve manufacturing recourses utilization effect
Rate.But laser fast shaping process completes under conditions of without extraneous driving force, therefore in laser forming process zero
There is the serious problem such as " strain cracking " and " internal flaw and interior tissue " in part, this is the great " bottle restricting the development of this technology
A neck difficult problem ".Therefore, on the basis of existing laser 3D printing technique, also to find more preferable intellectual technology and method, meet and swash
Light 3D is printed upon the demand of different field application, and China will specifically be implemented strategic requirement and the realization of " made in China 2025 " by this
Manufacturing power strategic objective is significant.
Summary of the invention
For problems of the prior art, the present invention proposes a kind of intelligent laser 3D printing equipment and printing side
Method.This printing equipment utilizes the 3 Dimension Image Technique of laser, rapid shaping technique and Laser Photoacoustic technology, especially with laser
3 Dimension Image Technique entity article that laser 3D is printed carry out 3-D scanning imaging, it is achieved the cad model of 3D solid；Profit
The entity article that laser 3D prints carries out the detection of internal flaw by Laser Photoacoustic technology, and real-time online detection laser 3D prints
The quality of entity article (cladding layer).The method utilizes same lasing light emitter to realize the CAD mould of the entity article that laser 3D prints
The functions such as type, rapid shaping and Inner Defect Testing, make laser 3D printing device systematization and intellectuality, have printing convenient,
Forming Quality is high, intelligence degree high, simple in construction and the advantage such as reliable.
A kind of intelligent laser 3D printing equipment that the present invention proposes, including shell, semiconductor laser, computer, work
Part platform, driving motor, galvanometer X, galvanometer Y, scanning mirror X, scanning mirror Y, field lens, molten bath and two CCD camera.
Described semiconductor laser peak power is 100W, and power can regulate from 0-100W, it is therefore intended that meet
The requirement of laser scanning imaging, rapid shaping and defects detection.
Described computer is connected with semiconductor laser, computer control the opening and closing of semiconductor laser.
Meanwhile, described computer can be also used for hardware controls, data process and result shows.Described semiconductor laser
Laser sequentially passes through galvanometer X, scanning mirror X, galvanometer Y, scanning mirror Y and field lens, incides molten bath or work stage.Described molten bath
Being positioned at sample formation intracavity with work stage, molten bath can be moved with shower nozzle, molten bath.
The laser that described semiconductor laser sends, controls light path to entity article by galvanometer, scanning mirror and field lens
Carry out 3-D scanning, 3 d scan data by described CCD picked-up, absorbed image through holding wire transmit deliver to described
On computer and store, and processed data by the scanning software Scan3DNow and image processing software CloudForm of computer,
Carry out the three dimensional point cloud collected processing modeling, thus obtain Solidworks model, cad model can be converted to.
Described semiconductor laser produces high energy pulse laser, and irradiation to physical objects produces laser ultrasonic；Institute
The laser heterodyne interferometer detection laser ultrasonic signal stated, is uploaded to computer and carries out signal processing analysis, thus realize 3D
Print the defects detection of entity article.
A kind of based on described intelligent laser 3D printing equipment the Method of printing that the present invention proposes, specifically includes following
Several steps:
Step one: the foundation of the cad model of entity article.
The entity article of ready-to-print is placed in the work stage in sample formation chamber, opens described semiconductor laser,
Entity article is carried out multiple orientation move by loading six axle parallel systems, control light path by galvanometer, scanning mirror and field lens
Entity article carries out 3-D scanning, and ccd video camera receives scan data, scan data by data line transfer to computer,
After the scanning software Scan3DNow and image processing software CloudForm of computer processes data, export CAD on computers
Model.
Step 2: the laser 3D of entity article prints.
Cad model is split, determines process and the running parameter of printing, after loading onto powder in molten bath, open and partly lead
Body laser, laser passes sequentially through galvanometer X, scanning mirror X, galvanometer Y, scanning mirror Y and field lens, adjusts the beam spot of laser beam, by counting
Calculation machine sends instructions to load six axle parallel systems according to the profile of entity article by data wire and controls the motion road of work stage
Footpath, laser action molten bath internalization powder, the powder after fusing is sprayed in work stage through shower nozzle, thus formation with entity article is
The cladding layer that cad model profile is corresponding.
Step 3: the Non-Destructive Testing of entity article.
Remove molten bath, open Laser Photoacoustic nondestructive detection system, specially open semiconductor laser and produce high-energy arteries and veins
Impulse light, adjusts the beam spot of laser beam by galvanometer X, scanning mirror X, galvanometer Y, scanning mirror Y and field lens, and laser irradiation is to cladding layer
Upper generation laser ultrasonic；When ultrasonic propagation is by way of fine crack, it will make a variation in cracks generation ultrasonic propagation；Adopt
The detection of ultrasonic signal is carried out with laser heterodyne interferometer；And it being uploaded to computer, computer is according to structural damage characteristic number
Show the detection of cladding layer internal flaw factually.
Step 4: according to testing result, if existing defects in cladding layer, the fault location reparation to cladding layer.
Step 5: shower nozzle opposite piece platform moves a slice thickness along forming direction, then on the basis of preceding layer
Superposition forms follow-up cladding layer, it is ensured that front and back two-layer fuses together.
Step 6: circulation performs step 3～step 5, eventually forms whole workpiece.
A kind of intelligent laser 3D printing equipment that the present invention proposes, has the advantage that
1, the present invention propose a kind of intelligent laser 3D printing equipment, entity article through laser scanning imaging system,
Automatically cad model is exported on computers, it is not necessary to manually carry out mechanical drawing, it is achieved that the automatization of printing.
2, a kind of intelligent laser 3D printing equipment that the present invention proposes, utilizes Laser Photoacoustic nondestructive detection system to exist in real time
The quality of the entity article that line detection 3D prints, is conducive to improving the quality that 3D prints.
3, a kind of intelligent laser 3D printing equipment that the present invention proposes, can be with the cad model of canbe used on line entity article
Foundation, printing, quality testing and reparation, improve the intellectuality of laser 3D printing equipment.
4, a kind of intelligent laser 3D printing equipment that the present invention proposes, device structure is simple, easy for installation, working service
Simplicity, reduces operating cost.
Accompanying drawing explanation
The composition schematic diagram of the intelligent laser 3D printing equipment that Fig. 1: the present invention proposes.
In figure:
1-shell；2-semiconductor laser；301-galvanometer X；302-galvanometer Y；
401-scanning mirror X；402-scanning mirror Y；5-field lens；6-molten bath；
7-work stage；8-drives motor； 901-CCDA； 902-CCDB；
10-laser heterodyne interferometer；11-computer；
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The present invention proposes a kind of intelligent laser 3D printing equipment and Method of printing, as it is shown in figure 1, described printing equipment
Including shell 1, semiconductor laser 2, galvanometer X301, galvanometer Y302, scanning mirror X401, scanning mirror Y402, field lens 5, molten bath 6,
Work stage 7, driving motor 8, CCDA901, CCDB902, laser heterodyne interferometer 10 and computer 11.Described work stage 7 He
Drive motor 8 composition load six axle parallel systems, drive motor 8 to drive work stage 7 to move, it is achieved to physical objects in work stage 7
The orientation of part moves control.Described semiconductor laser 2, galvanometer X301, galvanometer Y302, scanning mirror X401, scanning mirror Y402,
Field lens 5, molten bath 6, work stage 7, driving motor 8, CCDA901, CCDB902 and laser heterodyne interferometer 10 are all fixed by screw
On shell 1.Described semiconductor laser 2, galvanometer X301, galvanometer Y302, scanning mirror X401, scanning mirror Y402, field lens 5,
Motor 8, CCDA901, CCDB902 and laser heterodyne interferometer 10 is driven to be connected with computer 11 by data wire respectively.Described
Semiconductor laser 2 peak power be 100W, and power can regulate from 0-100W.Described field lens 5 focal length is 50-
300mm, processing sweep limits is 200-500mm, and spot diameter is 10-50 μm.Described driving motor 8 repeatable accuracy is ±
(2-10) μm, stroke X/Y/Z is (30mm × 30mm × 10mm)-(400mm × 400mm × 300mm), angular travel θ X/ θ Y/ θ Z
For (20 ° × 20 ° × 40 °)-(40 ° × 40 ° × 80 °).Described CCDA901 and CCDB902 be preferably resolution 1024 ×
1024, time of exposure be 0.01-100ms, frame frequency be ccd video camera (the Charge Coupled Device (CCD) imageing sensor of 0.1-5s
Charge coupled device, CCD).
Described computer uses scanning software to be Scan3DNow, and using image processing software is CloudForm software.
Described laser heterodyne interferometer 10 uses helium neon laser as detection light source, uses Prague acousto-optic modulation
Device, frequency difference is 80MHz.
The laser that described semiconductor laser 2 is launched, sequentially passes through galvanometer X301, scanning mirror X401, galvanometer Y302, scanning
Mirror Y402 and field lens 5, arrive molten bath 6, and in molten bath 6, powder melts under laser action, and the powder after fusing is sprayed on work through shower nozzle
On part, thus form the cladding layer corresponding with workpiece profile.
The present invention is based on described intelligent laser 3D printing equipment, and the present invention also provides for a kind of intelligent laser 3D and prints
Method, specifically includes following step:
Step one: the foundation of the cad model of entity article, is placed on the entity article of ready-to-print in work stage, opens
Laser scanning imaging system, particularly as follows:
Opening described semiconductor laser 2, laser passes sequentially through galvanometer X301, scanning mirror X401, galvanometer Y302, scanning
Mirror Y402 and field lens 5, control light path and be scanned work stage 7 entity article, by driving motor 8 to the reality in work stage 7
Body object carries out multiple orientation and moves, and is controlled by galvanometer X301, galvanometer Y302, scanning mirror X401, scanning mirror Y402, field lens 5
Light path carries out 3-D scanning to entity article, CCDA901 and CCDB902 receives scan data, and scan data is passed by data wire
It is passed to computer 11, after the scanning software Scan3DNow and image processing software CloudForm of computer 11 processes data,
Cad model is exported on computer 11.
Preferably, typically can sample stage be set in work stage, described entity article is placed on sample stage；Later stage
During printing, cladding layer is also sprayed on sample stage, it is to avoid the damage to work stage.
Step 2: the laser 3D of entity article prints.
Obtain cad model according to laser scanning imaging system, cad model is split, determine process and the work of printing
Make parameter, after loading onto powder in molten bath 6, open Laser Rapid Prototyping System, particularly as follows:
Open semiconductor laser 2, adjusted by galvanometer X301, scanning mirror X401, galvanometer Y302, scanning mirror Y402, field lens 5
The beam spot of whole laser beam, is controlled work stage 7 according to the profile of entity article by data wire order-driven motor 8 by computer 11
Motion path, fusing powder in laser action molten bath 6, the powder after fusing is sprayed in work stage 7 through shower nozzle, thus formed with
The cladding layer that entity article profile is corresponding.
Step 3: the Non-Destructive Testing of cladding layer, removes molten bath 6, opens Laser Photoacoustic nondestructive detection system, particularly as follows:
Open semiconductor laser 2 and produce high energy pulse laser, by galvanometer X301, scanning mirror X401, galvanometer Y302,
Scanning mirror Y402 and field lens 5 adjust the beam spot of laser beam, and laser irradiation to cladding layer produces laser ultrasonic；Work as laser-ultrasound
Ripple is propagated when fine crack, will make a variation in cracks generation ultrasonic propagation.
Use laser heterodyne interferometer 10 to carry out the detection of ultrasonic signal, data acquisition module carry out interference fringe change
The collection changed, and result of detection is transferred to computer 11, carries out the collection of structural damage characteristic and interior on computer 11
The detection of portion's defect.
Step 4: according to damage check result, if existing defects in cladding layer, carries out fault location to cladding layer and repaiies
Multiple.
Described reparation refers to repeat the printing cladding layer step in step 2, it may be assumed that
Open semiconductor laser 2, adjusted by galvanometer X301, scanning mirror X401, galvanometer Y302, scanning mirror Y402, field lens 5
The beam spot of whole laser beam, is controlled work stage 7 according to the profile of entity article by data wire order-driven motor 8 by computer 11
Motion path, fusing powder in laser action molten bath 6, the powder after fusing is sprayed on the rejected region on cladding layer through shower nozzle,
Carry out defect repair.
Step 5: shower nozzle opposite piece platform 7 moves a slice thickness along forming direction, then at preceding layer cladding layer
On the basis of superposition form follow-up cladding layer, it is ensured that front and back two-layer fuses together.
Step 6: circulation performs step 3～step 5, until forming whole workpiece；After printing, close intellectuality
Laser 3D printing equipment.
Claims (8)
1. an intelligent laser 3D printing equipment, it is characterised in that: include the semiconductor laser of computer, shell and inside thereof
Device, work stage, driving motor, galvanometer X, galvanometer Y, scanning mirror X, scanning mirror Y, field lens, molten bath and two CCD camera；
Described work stage and driving motor composition load six axle parallel systems, drive motor work stage is moved, it is achieved to work
On part platform, the orientation of entity article moves control；Described computer is connected with semiconductor laser, computer control partly to lead
The opening and closing of body laser；The laser of described semiconductor laser sequentially passes through galvanometer X, scanning mirror X, galvanometer Y, sweeps
Retouching mirror Y and field lens carries out light beam adjustment, light beam incides work stage and combines CCD camera entity article is carried out CAD modeling；Light beam
Incide molten bath to print；Beam irradiation produces laser ultrasonic to physical objects；Described laser heterodyne interferometer detection
Laser ultrasonic signal, is uploaded to computer and carries out signal processing analysis, thus realize 3D and print the defects detection of entity article.
A kind of intelligent laser 3D printing equipment the most according to claim 1, it is characterised in that: described semiconductor laser
Device peak power is 100W, and power is adjustable from 0-100W.
A kind of intelligent laser 3D printing equipment the most according to claim 1, it is characterised in that: described field lens focal length
For 50-300mm, processing sweep limits is 200-500mm, and spot diameter is 10-50 μm；Described driving motor repeatable accuracy is
± (2-10) μm, stroke X/Y/Z is (30mm × 30mm × 10mm)-(400mm × 400mm × 300mm), angular travel θ X/ θ Y/
θ Z is (20 ° × 20 ° × 40 °)-(40 ° × 40 ° × 80 °)；The resolution 1024 × 1024 of two described CCD camera, exposure
Time is 0.01-100ms, frame frequency is 0.1-5s；Described laser heterodyne interferometer use helium neon laser as detection light source,
Using Bragg acousto-optic modulator, frequency difference is 80MHz.
4. an intelligent laser 3D Method of printing, it is characterised in that: specifically include following step,
Step one: the foundation of the cad model of entity article；
Step 2: the laser 3D of entity article prints；
Step 3: the Non-Destructive Testing of entity article；
Step 4: according to the testing result in step 3, if existing defects in cladding layer, repaiies the fault location of cladding layer
Multiple；
Step 5: shower nozzle opposite piece platform moves a slice thickness, then superposition on the basis of preceding layer along forming direction
Form follow-up cladding layer, it is ensured that front and back two-layer fuses together；
Step 6: circulation performs step 3～step 5, eventually forms whole workpiece.
A kind of intelligent laser 3D Method of printing the most according to claim 4, it is characterised in that: step one is particularly as follows: handle
The entity article of ready-to-print is placed in the work stage in sample formation chamber, opens described semiconductor laser, by load six
Axle parallel system carries out multiple orientation to entity article and moves, and controls light path to entity article by galvanometer, scanning mirror and field lens
Carrying out 3-D scanning, ccd video camera receives scan data, and scan data passes through data line transfer to computer, sweeping of computer
After retouching software Scan3DNow and image processing software CloudForm process data, export cad model on computers.
A kind of intelligent laser 3D Method of printing the most according to claim 4, it is characterised in that: step 2 particularly as follows:
The cad model set up in step one is split, determines process and the running parameter of printing, in molten bath, load onto powder
After, open semiconductor laser, laser passes sequentially through galvanometer X, scanning mirror X, galvanometer Y, scanning mirror Y and field lens, adjusts laser beam
Beam spot, computer send instructions to load six axle parallel systems according to the profile of entity article by data wire and control workpiece
The motion path of platform, laser action molten bath internalization powder, the powder after fusing is sprayed in work stage through shower nozzle, thus is formed with real
The body object cladding layer that i.e. cad model profile is corresponding.
A kind of intelligent laser 3D Method of printing the most according to claim 4, it is characterised in that: step 3 is particularly as follows: move
Open molten bath, open semiconductor laser and produce high energy pulse laser, by galvanometer X, scanning mirror X, galvanometer Y, scanning mirror Y and field
Mirror adjusts the beam spot of laser beam, and laser irradiation to cladding layer produces laser ultrasonic；When ultrasonic propagation is by way of fine crack
Time, it will make a variation in cracks generation ultrasonic propagation；Laser heterodyne interferometer is used to carry out the detection of ultrasonic signal；On and
Passing to computer, computer realizes the detection of cladding layer internal flaw according to structural damage characteristic.
A kind of intelligent laser 3D Method of printing the most according to claim 4, it is characterised in that: repairing described in step 4
Refer to again repeat the printing cladding layer step in step 2, it may be assumed that
Open semiconductor laser, by galvanometer X, scanning mirror X, galvanometer Y, scanning mirror Y, field lens adjust laser beam beam spot, by
Computer passes through the motion path of data wire order-driven motor control work stage according to the profile of entity article, and laser action melts
Melting powder in pond, the powder after fusing is sprayed on the rejected region on cladding layer through shower nozzle, carries out defect repair.
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| CN201610509272.3A CN106003726A (en) | 2016-06-27 | 2016-06-27 | Intelligent laser 3D printing device and method |
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| CN201610509272.3A CN106003726A (en) | 2016-06-27 | 2016-06-27 | Intelligent laser 3D printing device and method |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106696051A (en) * | 2017-01-24 | 2017-05-24 | 上海普睿玛智能科技有限公司 | Large carbon dioxide laser 3D printing equipment and printing method thereof |
| CN107102061A (en) * | 2017-05-17 | 2017-08-29 | 大连理工大学 | Metal material high energy beam increases and decreases the online laser ultrasonic detection combined machining method of material |
| CN107378250A (en) * | 2017-05-31 | 2017-11-24 | 广东工业大学 | Large-scale part laser melting coating impact based on CCD monitoring forges combined shaping method |
| WO2018082097A1 (en) * | 2016-11-07 | 2018-05-11 | 东台精机股份有限公司 | Detection and repair device and method for powder additive manufacturing |
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