CN109663915B - Anti-cracking method for laser additive manufacturing - Google Patents
Anti-cracking method for laser additive manufacturing Download PDFInfo
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- CN109663915B CN109663915B CN201811627312.XA CN201811627312A CN109663915B CN 109663915 B CN109663915 B CN 109663915B CN 201811627312 A CN201811627312 A CN 201811627312A CN 109663915 B CN109663915 B CN 109663915B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000000654 additive Substances 0.000 title claims abstract description 25
- 230000000996 additive effect Effects 0.000 title claims abstract description 25
- 238000005336 cracking Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007639 printing Methods 0.000 abstract description 11
- 238000012545 processing Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 14
- 238000005245 sintering Methods 0.000 description 14
- 230000035882 stress Effects 0.000 description 7
- 238000010146 3D printing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000000110 selective laser sintering Methods 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011960 computer-aided design Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
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- 238000001035 drying Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
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- 238000000016 photochemical curing Methods 0.000 description 1
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- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/40—Radiation means
- B22F12/49—Scanners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
-
- 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
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/40—Radiation means
- B22F12/44—Radiation means characterised by the configuration of the radiation means
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses an anti-cracking method for laser additive manufacturing, which comprises a laser transmitter and a beam splitting system, wherein light emitted by the laser transmitter is divided into a plurality of groups of laser beams through the beam splitting system, one group of laser beams vertically irradiates on the surface of a workpiece to form circular light spots, the other laser beams respectively incline on the surface of the workpiece to form elliptical light spots, the circular light spots are smaller than the elliptical light spots of other laser beams, when a plurality of elliptical light spots exist, the sizes of the elliptical light spots are different, and the smaller light spots are positioned in a larger light spot range. According to the anti-cracking method for laser additive manufacturing, disclosed by the invention, the additive manufacturing laser is changed through the light splitting device and the irradiation device, so that a light spot with a temperature gradient is formed in a processing area, the temperature gradient generated during printing is gentle, and a formed object cannot crack.
Description
Technical Field
The invention relates to the technical field of laser additive manufacturing, in particular to an anti-cracking method for laser additive manufacturing.
Background
Laser additive manufacturing commonly known as 3D printing integrates computer aided design, material processing and forming technology and takes the form of numbers
Based on the model file, the special metal material, nonmetal material and medical biological material are processed by the software and the numerical control system,
the manufacturing technology of the solid object is manufactured by stacking layers by extrusion, sintering, melting, photo-curing, spraying and the like.
In the laser additive manufacturing process of metal, a selective laser sintering method is generally adopted, the processing process is also called selective laser sintering, the powder material in the movable cylinder body is paved on the upper surface of a formed part in the forming cylinder body by a powder paving device, the upper surface is heated, a control system controls a laser beam to scan on the powder according to the cross-section contour of the layer, the temperature of the powder is raised to a melting point, sintering is carried out, and bonding is realized with the formed part below. After the sintering of the section of one layer is completed, the cylinder workbench descends by one layer of thickness, the spreading device spreads a layer of uniform and compact powder on the cylinder workbench, and the sintering of the section of the new layer is performed until the whole model is completed. The problem that the material is unstable in molding and short in service life due to the uneven heating to generate stress and bubbles is caused, and the product can deform due to release of internal stress after the storage time is too long. The support is designed for the place easy to deform, and the surface quality is general.
A warp-resistant and crack-resistant ABS3D printing wire of publication No. CN107603121a, which is only modified in terms of material, has no effect on other materials, is limited to only one of its materials, and has considerable limitations.
The ceramic 3D printing extrusion molding device and method with the application number of 201710099473.5 only adopts a two-position three-way electromagnetic valve and a screw valve to control the conveying and the timely stopping of ceramic materials, so that the printing precision is improved; the screw rod adopts a polytetrafluoroethylene tube, so that ceramic materials cannot be stuck during printing, the friction resistance is very small, the smoothness of material flow is ensured, and bubbles are prevented; the external heating part is arranged to bake the ceramic green body extruded by printing, so that the drying speed of the green body is increased, and the printing speed is increased; meanwhile, the ceramic material in the extrusion sleeve can be heated by the heat emitted by the heating part, so that the smoothness of material flow is further ensured, and the generation of bubbles is prevented. Although this patent proposes prevention of cracking by bubble generation, it is limited to ceramics and cannot provide anti-cracking effect on other materials.
The invention with application number 201611049166.8 discloses a 3D printing wire and a preparation method thereof, wherein the preparation method comprises the following steps: mixing acrylonitrile, butadiene, styrene plastic, polylactic acid, photosensitive resin, nylon, aluminum powder, ceramic fiber, an initiator, a cross-linking agent and pigment, and melting to form a melt M; drawing and molding the melt M to obtain the 3D printing wire; solves the problems that the common wire rod is easy to warp after being molded and the quality of molded products is affected due to uneven shrinkage caused by different cooling speeds. This patent only improves on 3D printing wires, is not useful for all printing materials, has considerable limitations, and does not achieve prevention of cracking of all printing materials.
The temperature field measuring device used by one SLS technology with publication No. 205826151U can only control the change of the heating temperature of a single area, but does not realize the temperature control problem of the peripheral area of the heating center, and cannot play a role in controlling the temperature field around the processed material.
In summary, the selective laser sintering method or the warp-resistant and cracking-resistant ABS3D printing wire is practically feasible, but the ideal effect is not achieved.
Disclosure of Invention
The invention aims at: the method overcomes the defects of the prior art, provides an anti-cracking method for laser additive manufacturing, and solves the problems that the product is broken and the performance is not up to standard due to stress or deformation generated in the additive manufacturing process. The beam splitting device formed by the spectroscope and the reflecting mirror is used for changing the emitting mode of laser in the additive manufacturing process, and the irradiation device formed by the lens and the reflecting mirror is used for forming a temperature gradient on the light spot irradiated by the laser on metal. The laser of additive manufacturing is changed through the light splitting device and the irradiation device, so that a spot with temperature gradient is formed in a processing area, the temperature gradient generated during printing is gentle, and a formed object cannot crack; the front end of the elliptical light spot, which is relative to the movement direction of the relative movement of the workpiece, is close to the circular light spot, so that the irradiation light spot of the laser beam is matched with the temperature distribution structure of a molten pool on the surface of the workpiece during additive manufacturing, and the sintering effect is balanced and the temperature difference thermal stress is eliminated; the beam splitter divides the laser beam into 50% of reflected light and 50% of penetrating light, so that the laser intensity divided by the beam splitter is the same; the frequency of beam splitting of the laser beam vertically irradiating the surface of the workpiece is in the range of 1-4 times, so that the problem that the laser beam intensity of the laser beam is low after the frequency of beam splitting is too high and the power of the laser transmitter needs to be improved for sintering the laser beam vertically arranged on the surface of the workpiece is avoided; the laser beams are respectively shot on the surface of the workpiece through the reflectors, so that the incident angle between the laser beams and the workpiece is convenient to adjust, the operation is convenient, and the applicability is improved; the diameter of the laser beam perpendicularly penetrating the workpiece is reduced after passing through the lens group, so that the intensity of the laser beam for sintering is further improved, and the quantity of other laser beams which emit elliptical light spots is also conveniently increased, so that the temperature difference between different temperature gradients around the sintering position of the workpiece is reduced, and the elimination of the temperature difference stress is further facilitated; the diameter of the laser beam obliquely projected on the workpiece is increased after passing through the lens group, so that the temperature gradient range around the sintering position of the workpiece is improved, and the elimination of temperature difference stress is further facilitated.
The technical scheme adopted by the invention is as follows:
the utility model provides a laser vibration material disk anticracking method, includes laser emitter and beam splitting system, the light that the laser emitter sent divides into multiunit laser beam through beam splitting system, and wherein a set of laser beam perpendicular to is penetrated in the work piece surface and is formed circular facula, and other laser beams are penetrated in the surface of work piece respectively to slope, and circular facula is less than the oval facula of other laser beams respectively, when oval facula has a plurality ofly, the size of oval facula is different, less facula is located great facula scope.
According to a further improvement scheme, the long axes of the elliptical light spots are on the same straight line, and the long axes of the elliptical light spots pass through the circle centers of the circular light spots.
The invention further improves the scheme that the straight line where the long axis of the elliptical light spot is positioned and the circle center of the circular light spot are the same straight line relative to the straight line where the moving direction of the workpiece is positioned.
According to a further improvement scheme, the front end of the elliptical light spot relative to the movement direction of the workpiece is close to the circular light spot.
In a further improvement of the invention, the light splitting system comprises a primary spectroscope or a multi-stage spectroscope.
In a further development of the invention, the beam splitter splits the impinging laser beam into 50% reflected light and 50% transmitted light.
The invention further improves the scheme that the laser beam perpendicularly emitted to the surface of the workpiece is split by the spectroscope
The number is in the range of 1 time to 4 times.
The invention further improves the scheme that the laser beams after being split by the beam splitting system are respectively emitted to the reflector
The surface of the workpiece.
The invention further improves the scheme that the laser beams after being split by the beam splitting system respectively pass through the lens group to form parallel beams to be emitted to the surface of the workpiece.
In a further development of the invention, the laser beam perpendicularly striking the workpiece is reduced in diameter after passing through the lens group.
In a further development of the invention, the laser beam which is directed obliquely to the workpiece is increased in diameter after passing through the lens group.
The invention has the beneficial effects that:
according to the anti-cracking device for laser additive manufacturing, disclosed by the invention, the laser is changed in the additive manufacturing process through the light splitting device and the irradiation device, so that a spot with a temperature gradient is formed in a processing area, the temperature gradient generated during printing is gentle, and a formed object cannot crack.
The long axis of the elliptical light spot is on the same straight line, and the straight line where the long axis of the elliptical light spot is positioned and the straight line where the center of the circular light spot is positioned relative to the moving direction of the workpiece is the same straight line; the front end of the elliptic light spot, which is relative to the movement direction of the workpiece, is close to the circular light spot, so that the irradiation light spot of the laser beam is matched with the temperature distribution structure of a molten pool on the surface of the workpiece during additive manufacturing, and the sintering effect is balanced and the temperature difference thermal stress is eliminated.
Third, the invention relates to a laser additive manufacturing anti-cracking device, a spectroscope divides the laser beam emitted by the spectroscope into 50% of reflected light and 50% of penetrating light, so that the laser intensity divided by the spectroscope is the same.
Fourth, according to the laser additive manufacturing anti-cracking device disclosed by the invention, the frequency of beam splitting of the laser beam perpendicularly emitted to the surface of the workpiece is in the range of 1-4 times, so that the problem that the laser beam perpendicularly arranged on the surface of the workpiece for sintering has lower intensity due to excessive splitting frequency and the power of a laser transmitter needs to be improved is avoided.
Fifth, the laser additive manufacturing anti-cracking device provided by the invention has the advantages that the laser beams are respectively shot on the surface of the workpiece through the reflectors, so that the incident angle between the laser beams and the workpiece is convenient to adjust, the operation is convenient, and the applicability is improved.
Sixth, the laser additive manufacturing anti-cracking device provided by the invention has the advantages that the diameter of the laser beam perpendicularly emitted to the workpiece is reduced after passing through the lens group, the intensity of the laser beam for sintering is further improved, and meanwhile, the number of other laser beams emitted from elliptical light spots is also conveniently increased, so that the temperature difference between different temperature gradients around the sintering position of the workpiece is reduced, and the elimination of temperature difference stress is further facilitated.
Seventh, the laser additive manufacturing anti-cracking device provided by the invention has the advantages that the diameter of the laser beam obliquely irradiated to the workpiece is increased after passing through the lens group, the temperature gradient range around the sintering position of the workpiece is improved, and the elimination of temperature difference stress is further facilitated.
Drawings
Fig. 1 is a schematic view of the optical path of the present application.
Fig. 2 is an enlarged schematic view of the spot of the present application.
Detailed Description
Referring to fig. 1 to 2, the present invention includes a laser transmitter 1 and a beam splitting system, wherein the beam splitting system includes a first beam splitter 2, a second beam splitter A3, a second beam splitter B4, a reflector A5, a reflector B6, a reflector C7, a reflector D8, a reflector E9, a lens group a10, a lens group B11, a lens group C12, and a lens group D13.
The light emitted by the laser emitter 1 is divided into 4 groups of laser beams by a light splitting system:
the laser beam a emitted by the laser emitter l is split into a reflected laser beam b and a penetrated laser beam c after being split by the first-stage beam splitter 2; the laser beam b is split into a reflected laser beam e and a penetrated laser beam d after being split by the second splitter A3; the laser beam c is split into a reflected laser beam g and a transmitted laser beam h after being split by the second splitter B4.
The laser beam e reflects the laser beam f through the reflector A5, and then emits the laser beam k through the lens group A10, wherein the diameter of the laser beam k is smaller than that of the laser beam f, and the laser beam k perpendicularly irradiates the surface of the workpiece 14 to form a circular light spot 15.
The laser beam d passes through the lens group B11 and then emits a laser beam j, the diameter of the laser beam j is larger than that of the laser beam d, the laser beam j is reflected by the reflector C7 to emit a laser beam n, and the laser beam n is obliquely emitted to the position of the circular light spot 15 on the surface of the workpiece 14 to form an elliptical light spot A16.
The laser beam g passes through the lens group C12 and then emits a laser beam l, the diameter of the laser beam l is larger than that of the laser beam g, the laser beam l is reflected by the reflector D8 to emit a laser beam o, and the laser beam o is obliquely emitted to the position of the circular light spot 15 on the surface of the workpiece 14 to form an elliptical light spot B17.
The laser beam h reflects the laser beam i through the reflector B6, the laser beam i emits the laser beam m after passing through the lens group D13, the diameter of the laser beam m is larger than that of the laser beam i, the laser beam m reflects the laser beam p through the reflector E9, and the laser beam p is obliquely emitted to the position of the circular light spot 15 on the surface of the workpiece 14 to form an elliptical light spot C18.
Wherein the angle of incidence of the laser beam n with the surface of the workpiece 14 is smaller than the angle of incidence of the laser beam o with the surface of the workpiece 14, and the angle of incidence of the laser beam o with the surface of the workpiece 14 is smaller than the angle of incidence of the laser beam p with the surface of the workpiece 14, the elliptical spot a16 is smaller than the elliptical spot B17, and the elliptical spot B17 is smaller than the elliptical spot C18.
In addition, the major axis of the elliptical spot a16, the major axis of the elliptical spot B17 and the major axis of the elliptical spot C18 are coaxial and pass through the center of the circular spot 15.
The major axis of the elliptical spot a16, the major axis of the elliptical spot B17 and the major axis of the elliptical spot C18 are in the same straight line with the center of the circular spot 15 with respect to the straight line with the movement direction of the workpiece 14.
The front ends of the elliptical light spot A16, the elliptical light spot B17 and the elliptical light spot C18 relative to the movement direction of the workpiece 14 are all close to the circular light spot 15.
Claims (3)
1. A method for manufacturing anti-cracking by laser additive is characterized by comprising a laser transmitter (1) and a light splitting system, wherein light emitted by the laser transmitter (1) is split into a plurality of groups of laser beams by the light splitting system, one group of laser beams vertically irradiates on the surface of a workpiece (14) to form circular light spots (15), the rest of the laser beams respectively incline to the surface of the workpiece (14) to form elliptical light spots respectively, the circular light spots (15) are smaller than the elliptical light spots of other laser beams, when a plurality of elliptical light spots exist, the sizes of the elliptical light spots are different, the smaller light spots are positioned in a larger light spot range,
the light emitted by the laser emitter is divided into 4 groups of laser beams through a light splitting system:
the laser beam a emitted by the laser emitter is split into a reflected laser beam b and a penetrated laser beam c after being split by the first-stage spectroscope; the laser beam B is split into a reflected laser beam e and a penetrated laser beam d after being split by the second splitter A, the laser beam c is split into a reflected laser beam g and a penetrated laser beam h after being split by the second splitter B,
wherein the laser beam e reflects the laser beam f through the reflector A, the laser beam f emits the laser beam k after passing through the lens group A, the diameter of the laser beam k is smaller than that of the laser beam f, the laser beam k perpendicularly irradiates the surface of the workpiece to form a circular light spot,
the laser beam d passes through the lens group B and then emits a laser beam j, the diameter of the laser beam j is larger than that of the laser beam d, the laser beam j reflects a laser beam n through the reflector C, the laser beam n is obliquely emitted to the circular light spot position on the surface of the workpiece to form an elliptical light spot A,
the laser beam g passes through the lens group C and then emits a laser beam l, the diameter of the laser beam l is larger than that of the laser beam g, the laser beam l is reflected by the reflector D to emit a laser beam o, the laser beam o is obliquely emitted to the circular light spot position on the surface of the workpiece to form an elliptical light spot B,
the laser beam h reflects the laser beam i through the reflector B, the laser beam i emits the laser beam m through the lens group D, the diameter of the laser beam m is larger than that of the laser beam i, the laser beam m reflects the laser beam p through the reflector E, the laser beam p obliquely irradiates on the circular light spot position on the surface of the workpiece to form an elliptical light spot C,
the incidence angle of the laser beam n with the workpiece surface is smaller than the incidence angle of the laser beam o with the workpiece surface, the incidence angle of the laser beam o with the workpiece surface is smaller than the incidence angle of the laser beam p with the workpiece surface, the elliptical light spot A is smaller than the elliptical light spot B, the elliptical light spot B is smaller than the elliptical light spot C,
the front end of the elliptical light spot relative to the movement direction of the relative movement with the workpiece (14) is close to the circular light spot (15).
2. A method of laser additive manufacturing crack control as in claim 1 wherein the major axis of the elliptical spot is collinear and the major axis of the elliptical spot passes through the center of the circular spot (15).
3. A method of laser additive manufacturing as set forth in claim 2, wherein the line along which the long axis of the elliptical spot is located is the same line as the center of the circular spot (15) with respect to the line along which the direction of movement of the workpiece (14) is located.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811627312.XA CN109663915B (en) | 2018-12-28 | 2018-12-28 | Anti-cracking method for laser additive manufacturing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811627312.XA CN109663915B (en) | 2018-12-28 | 2018-12-28 | Anti-cracking method for laser additive manufacturing |
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| CN109663915A CN109663915A (en) | 2019-04-23 |
| CN109663915B true CN109663915B (en) | 2024-03-26 |
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Citations (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001058284A (en) * | 1999-06-14 | 2001-03-06 | Shin Meiwa Ind Co Ltd | Laser beam working machine |
| CN103305843A (en) * | 2013-07-09 | 2013-09-18 | 铜陵学院 | Embossed laser beam implementation method and device for reducing cracks on cladding layer |
| CN104162741A (en) * | 2014-07-31 | 2014-11-26 | 北京万恒镭特机电设备有限公司 | Laser processing device and method thereof |
| CN104816087A (en) * | 2015-04-17 | 2015-08-05 | 温州大学 | Laser processing head based on single-beam time-space characteristic regulation |
| WO2015132640A1 (en) * | 2014-03-06 | 2015-09-11 | Юрий Александрович ЧИВЕЛЬ | Laser cladding method and device for implementing same |
| KR101682087B1 (en) * | 2015-11-27 | 2016-12-02 | 한국기계연구원 | Apparatus and method for manufacturing three dimensional shapes using laser and powder |
| CN205826151U (en) * | 2016-05-18 | 2016-12-21 | 苏州大业三维打印技术有限公司 | The temperature field measurement device that a kind of SLS technology is used |
| CN106334872A (en) * | 2016-08-30 | 2017-01-18 | 淮阴工学院 | Automatic focusing and real-time fine adjustment method for laser end surface texture machine |
| CN106444049A (en) * | 2016-10-09 | 2017-02-22 | 苏州大学 | Laser broadband fusion covering device |
| CN106498389A (en) * | 2016-11-10 | 2017-03-15 | 暨南大学 | Based on the laser cladding apparatus that multi-focus lenss produce the gentle cold light of preheating |
| CN106633596A (en) * | 2016-11-25 | 2017-05-10 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | 3D (three-dimensional) printing wire and method for preparing same |
| CN106671246A (en) * | 2017-02-23 | 2017-05-17 | 醴陵市陶瓷3D打印研究所 | Ceramic 3D printing extrusion molding device and method |
| CN107096920A (en) * | 2017-05-25 | 2017-08-29 | 华南理工大学 | A kind of non-average dual-beam synchronous scanning selective laser melting appartus and its light path synthetic method |
| WO2017159874A1 (en) * | 2016-03-18 | 2017-09-21 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Laser processing device, three-dimensional shaping device, and laser processing method |
| CN107335915A (en) * | 2017-06-12 | 2017-11-10 | 大族激光科技产业集团股份有限公司 | Laser soldering device and its welding method |
| CN206824663U (en) * | 2017-05-25 | 2018-01-02 | 华南理工大学 | A kind of non-average dual-beam synchronous scanning selective laser melting appartus |
| CN107603121A (en) * | 2017-09-20 | 2018-01-19 | 福建师范大学 | A kind of ABS3D printing wire rods of resistance to warpage crack resistence and preparation method thereof |
| CN108248011A (en) * | 2017-12-20 | 2018-07-06 | 广东工业大学 | A kind of laser-impact is forged with being cut by laser compound increasing material manufacturing device and method |
| CN108405860A (en) * | 2018-05-17 | 2018-08-17 | 中国兵器装备研究院 | A kind of dual-beam increasing material manufacturing method and apparatus |
| CN207756917U (en) * | 2018-01-13 | 2018-08-24 | 西安增材制造国家研究院有限公司 | Metal powder laser melts increasing material manufacturing device |
| CN108453261A (en) * | 2018-06-21 | 2018-08-28 | 西安增材制造国家研究院有限公司 | A kind of device that there is the laser gain material of preheating and slow cooling function to manufacture |
| CN108838548A (en) * | 2018-09-07 | 2018-11-20 | 中国工程物理研究院激光聚变研究中心 | Laser polishing device and polishing method |
| CN108919499A (en) * | 2018-07-05 | 2018-11-30 | 鲁东大学 | A method of generating position and the individually controllable multiple focal beam spots of intensity |
| CN208214331U (en) * | 2018-04-25 | 2018-12-11 | 西安增材制造国家研究院有限公司 | The local temperature control device of workpiece during a kind of metal increasing material manufacturing |
| CN209532097U (en) * | 2018-12-28 | 2019-10-25 | 淮阴工学院 | A kind of laser 3D manufacturing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5446631B2 (en) * | 2009-09-10 | 2014-03-19 | アイシン精機株式会社 | Laser processing method and laser processing apparatus |
-
2018
- 2018-12-28 CN CN201811627312.XA patent/CN109663915B/en active Active
Patent Citations (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001058284A (en) * | 1999-06-14 | 2001-03-06 | Shin Meiwa Ind Co Ltd | Laser beam working machine |
| CN103305843A (en) * | 2013-07-09 | 2013-09-18 | 铜陵学院 | Embossed laser beam implementation method and device for reducing cracks on cladding layer |
| WO2015132640A1 (en) * | 2014-03-06 | 2015-09-11 | Юрий Александрович ЧИВЕЛЬ | Laser cladding method and device for implementing same |
| CN104162741A (en) * | 2014-07-31 | 2014-11-26 | 北京万恒镭特机电设备有限公司 | Laser processing device and method thereof |
| CN104816087A (en) * | 2015-04-17 | 2015-08-05 | 温州大学 | Laser processing head based on single-beam time-space characteristic regulation |
| KR101682087B1 (en) * | 2015-11-27 | 2016-12-02 | 한국기계연구원 | Apparatus and method for manufacturing three dimensional shapes using laser and powder |
| WO2017159874A1 (en) * | 2016-03-18 | 2017-09-21 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Laser processing device, three-dimensional shaping device, and laser processing method |
| CN205826151U (en) * | 2016-05-18 | 2016-12-21 | 苏州大业三维打印技术有限公司 | The temperature field measurement device that a kind of SLS technology is used |
| CN106334872A (en) * | 2016-08-30 | 2017-01-18 | 淮阴工学院 | Automatic focusing and real-time fine adjustment method for laser end surface texture machine |
| CN106444049A (en) * | 2016-10-09 | 2017-02-22 | 苏州大学 | Laser broadband fusion covering device |
| CN106498389A (en) * | 2016-11-10 | 2017-03-15 | 暨南大学 | Based on the laser cladding apparatus that multi-focus lenss produce the gentle cold light of preheating |
| CN106633596A (en) * | 2016-11-25 | 2017-05-10 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | 3D (three-dimensional) printing wire and method for preparing same |
| CN106671246A (en) * | 2017-02-23 | 2017-05-17 | 醴陵市陶瓷3D打印研究所 | Ceramic 3D printing extrusion molding device and method |
| CN107096920A (en) * | 2017-05-25 | 2017-08-29 | 华南理工大学 | A kind of non-average dual-beam synchronous scanning selective laser melting appartus and its light path synthetic method |
| CN206824663U (en) * | 2017-05-25 | 2018-01-02 | 华南理工大学 | A kind of non-average dual-beam synchronous scanning selective laser melting appartus |
| CN107335915A (en) * | 2017-06-12 | 2017-11-10 | 大族激光科技产业集团股份有限公司 | Laser soldering device and its welding method |
| CN107603121A (en) * | 2017-09-20 | 2018-01-19 | 福建师范大学 | A kind of ABS3D printing wire rods of resistance to warpage crack resistence and preparation method thereof |
| CN108248011A (en) * | 2017-12-20 | 2018-07-06 | 广东工业大学 | A kind of laser-impact is forged with being cut by laser compound increasing material manufacturing device and method |
| CN207756917U (en) * | 2018-01-13 | 2018-08-24 | 西安增材制造国家研究院有限公司 | Metal powder laser melts increasing material manufacturing device |
| CN208214331U (en) * | 2018-04-25 | 2018-12-11 | 西安增材制造国家研究院有限公司 | The local temperature control device of workpiece during a kind of metal increasing material manufacturing |
| CN108405860A (en) * | 2018-05-17 | 2018-08-17 | 中国兵器装备研究院 | A kind of dual-beam increasing material manufacturing method and apparatus |
| CN108453261A (en) * | 2018-06-21 | 2018-08-28 | 西安增材制造国家研究院有限公司 | A kind of device that there is the laser gain material of preheating and slow cooling function to manufacture |
| CN108919499A (en) * | 2018-07-05 | 2018-11-30 | 鲁东大学 | A method of generating position and the individually controllable multiple focal beam spots of intensity |
| CN108838548A (en) * | 2018-09-07 | 2018-11-20 | 中国工程物理研究院激光聚变研究中心 | Laser polishing device and polishing method |
| CN209532097U (en) * | 2018-12-28 | 2019-10-25 | 淮阴工学院 | A kind of laser 3D manufacturing device |
Non-Patent Citations (2)
| Title |
|---|
| 基于动态梯度的激光光斑中心定位算法;蓝章礼;《计算机科学》;223-226 * |
| 大功率半导体激光器光斑整形和均匀化处理;张仁俊;《四川兵工学报》;125-126 * |
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