CN208513642U - A kind of device that the laser gain material with preheating and slow cooling function manufactures - Google Patents
A kind of device that the laser gain material with preheating and slow cooling function manufactures Download PDFInfo
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- CN208513642U CN208513642U CN201820959482.7U CN201820959482U CN208513642U CN 208513642 U CN208513642 U CN 208513642U CN 201820959482 U CN201820959482 U CN 201820959482U CN 208513642 U CN208513642 U CN 208513642U
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- laser
- preheating
- slow cooling
- spot
- gain material
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Abstract
The utility model discloses a kind of devices that the laser gain material with preheating and slow cooling function manufactures.The device includes laser, light chopper and focusing system and the workbench for placing matrix, energy beam splitting occurs in light chopper and focusing system and forms at least two-stage energy for the laser beam of the laser output, wherein first order energy is processed to cladding, is finally radiated at the center that corresponding solid hot spot on matrix is located at whole hot spot；Energy corresponding hot spot in the second level is the ring-shaped light spot around the center spot, to realize preheating and slow cooling.The device realizes laser melting coating, substrate preheating and cladding layer slow cooling simultaneously using same laser heat source, can be effectively reduced the temperature gradient in cladding process, reduces internal stress, inhibits crack defect to generate, and do not limited by size of formed part and shape.
Description
Technical field
The utility model belongs to material increasing field, is related to a kind of device of laser gain material manufacture.
Background technique
Laser gain material manufacturing technology is a kind of advanced laser machining forming for taking into account Accurate Shaping and high-performance forming needs
Manufacturing technology, it includes special using synchronous powder feeding system as the laser solid forming technology of technical characteristics and by major technique of powder bed
The selective laser melting process of sign.Wherein, laser solid forming technology can be realized the fast without mould of high-performance densified metal component
Fast nearly forming, and forming dimension is substantially unrestricted can also realize any compound and terraced of multiple material on same component
Spend structure manufacture.
Due to laser energy density height, quickly heats and be quickly cooled down and rapidoprint can be made to produce in laser gain material manufacturing process
Raw excessive internal stress easily causes drip molding cracking.In order to control the thermal stress in forming process, preheating slow cooling skill is introduced
Art, the preheating of matrix and the slow cooling of cladding layer can effectively reduce the temperature gradient in forming process, shape to reduce
The thermal stress generated in journey inhibits crack defect to generate, and is of great significance to high mass components are obtained.
Currently, common substrate preheating method is integrally to heat base using external heat sources such as hot water radiation wire or electromagnetic induction
Body.Author investigation is found in technical paper " influence that substrate preheating repairs GH4169 alloy property to laser deposition ", matrix
Entirety is preheated to 300 DEG C, and the residual stress of GH4169 alloy sample has apparent reduction.Matrix is integrally heated to reduction thermal stress
Tool has certain effect, but increasing material manufacturing is layer-by-layer stack shaping, with the increase of the deposition number of plies, preheating temperature will be caused uneven
It is even；In addition there are also problems in increasing material manufacturing integration of equipments for preheating device.
In order to avoid matrix integrally heats bring adverse effect, current solution mainly increases independent heat source
It is mobile with processing laser synchronization, preheating slow cooling is carried out for (motion profile processed along cladding) part.Such as:
Chinese patent literature CN103774137A realizes laser melting and coating process using multi-laser, wherein First laser
Device is used for substrate preheating, and second (or more) laser is processed for cladding, and third platform is for cladding layer Slow cooling or not
The natural cooling with laser, this method can effectively control crack defect and gas hole defect in cladding layer, but cost of implementation
Height, and complex structural designs.
Chinese patent literature CN102383126A carries out laser melting coating using two lasers, wherein a laser is used
It is processed in cladding, using beam splitter to separate one in front and one in back two beam laser in another laser, (irradiation position is located at cladding
Process the front and back of hot spot), preceding laser is used for substrate preheating, and rear laser is used to after carrying out the coating of formation be heat-treated.
The program can only can not be applicable in the laser melting coating with corner structure, poor universality in straight line cladding process effectively.
Utility model content
In order to reduce the thermal stress generated in laser gain material manufacturing process, inhibit forming cracking, the utility model proposes one
The device that there is kind the laser gain material of preheating and slow cooling function to manufacture, versatility is good, and working efficiency is higher.
The solution of the utility model is as follows:
The device includes laser, light chopper and focusing system and the workbench for placing matrix, the laser
The laser beam of output occur in light chopper and focusing system energy beam splitting formed two-stage energy, wherein first order energy to
Cladding processing is finally radiated at the center that corresponding solid hot spot on matrix is located at whole hot spot, is denoted as center spot；The second level
The corresponding hot spot of energy is the ring-shaped light spot around the center spot, to realize preheating and slow cooling.
In this way, interior solid hot spot carries out metal cladding, the preceding part of outer annular hot spot in laser processing procedure
(front region relative to interior solid hot spot) realizes the preheating to matrix, and rear part is (after interior solid hot spot
Square region) realize cladding layer slow cooling.
Based on above scheme, the utility model has also further made following optimization:
A kind of preferable structure of light chopper and focusing system are as follows: beam splitter including taper, generally ring structure
Reflecting mirror and for the focus lamp to the laser beam focus for transmiting the beam splitter；The beam splitter, reflecting mirror and focus lamp
Coaxial with incident laser beam, the reflecting surface of reflecting mirror is curved reflecting surface, and the laser beam of laser output is incident on beam splitter
On be divided into transmitted light beam and the reflected beams, transmitted light beam ultimately forms the center spot, and the reflected beams are again through the reflecting mirror
Center spot periphery is reflexed to, the ring-shaped light spot is formed.Certainly, light chopper and focusing system are also not necessarily limited to a kind of this knot
Structure, only other structures can relative complex or cost of implementation it is higher.
Further, beam splitter is cone, and taper is 90 degree；Correspondingly, the transmitted light beam ultimately form it is circular
Center spot.
Further, reflecting mirror is also configured with position adjusting mechanism, for adjusting the angle of curved reflecting surface, to change
The size of ring-shaped light spot.
Further, reflecting mirror integrally forms the ring structure, the position adjusting mechanism energy by multiple discrete components
Enough angles for independently adjusting each section of curved reflecting surface.
Further, beam splitter realizes the beam splitting of transmission/reflection/angle, such as the material of beam splitter by the way of surface coating
It is preferred that K9 glass or quartz, and surface coating, to realize that fractional transmission, part reflect.
Laser is optical fiber laser (can be transmitted through the optical fiber the continuous multimode laser of high power).
First order energy and the ratio of second level energy can be adjusted by the filming parameter on beam splitter surface, root
Factually border technological effect is configured.It is optically easy to accomplish for 50%:50%.
The technical effect of the utility model:
1, the utility model uses same incident light source, by the design of optical system, forms preheating slow cooling laser conduct
Energy distribution centered on outer ring, cladding processing laser, realizes the integration of cladding processing, substrate preheating and slow cooling, no
Temperature gradient and thermal stress are reduced only more significantly, it is suppressed that crack defect generates, and avoids lacking for lineal layout
Point is not limited by increasing material manufacturing size of formed part and shape.
2, a kind of light chopper and focusing system that the utility model provides, using beam splitter and reflecting mirror by beam of laser
It is divided into two beam laser of outer annular laser and interior solid laser, and taper and parameters of film, reflection by adjusting beam splitter
The position of mirror and angle can easily realize the ring-shaped light spot of different sizes and power distribution.
Detailed description of the invention
Fig. 1 is the schematic diagram of increasing material manufacturing system.
Fig. 2 is the light channel structure schematic diagram of light chopper and focusing system.
Fig. 3 is the spot projection schematic diagram of laser gain material manufacturing device.
Fig. 4 is laser gain material manufacturing process schematic diagram.
Specific embodiment
With reference to the accompanying drawing, the utility model is described in further detail by specific embodiment.
As depicted in figs. 1 and 2, whole system include laser 1, beam splitter 2, reflecting mirror 3, focus lamp 4, powder feed system 5,
Matrix 6 and workbench.Matrix 6 is placed on the table, and is located at the lower section of focus lamp 4 and powder feed system 5；Powder feed system 5 is used
In the device realized during increasing material manufacturing with cladding laser coaxial powder feeding (for entire increasing material manufacturing system, powder feeding
The installation site of system 5 is not limited to specific location shown in FIG. 1).
Laser 1 is optical fiber laser, and wavelength 1060nm, minimum light spot diameter is 0.4mm, peak power output 4KW.
Beam splitter 2 is cone, and beam splitter material is K9 glass or quartz, and surface coating, splitting ratio can be by beam splitter 2
Parameters of film is adjusted.By setting the parameters of film of beam splitter 2, laser 1 can be exported into laser L1 and be beamed into watt level
Different laser beam L2 and L3, wherein high-power laser beam L2 forms cladding transmitted through beam splitter 2 and processes laser, and small-power swashs
Light beam L3 is formed through beam splitter 2 and reflecting mirror 3 and is preheated gentle cold laser.
Reflecting mirror 3 is ring structure, and reflecting surface is arc, so it is annular beam that reflection, which focuses on 6 surface of matrix,.It can
High reflectance copper film layer, and allocation position regulating mechanism are plated in curved reflecting surface, reflecting mirror can be carried out around some point or axis
Rotation.In this way, can be adjusted according to the needs the angle of reflected light, to change the position of annular beam focus point distance center point
It sets.Further, the curved reflecting surface angle is adjusted for convenience, the ring junction that multiple discrete component groups can be used integral
Structure.
By the structure adjusting of 3 position of parameters of film and reflecting mirror, angle to beam splitter 2, different sizes may be implemented
With the ring-shaped light spot of power distribution.When different sizes and the annular beam of power distribution are manufactured for laser gain material, it can play
The effect of slow cooling is preheated, it is variant only to preheat slow cooling effect.
Such as:
1 output power of laser is the laser beam L1 of 1700W, and laser beam L1 is incident on the conical surface of beam splitter 2, beam splitter 2
Laser beam L1 is divided for laser beam L2 and laser beam L3, wherein laser beam L2 power is 1500W, and laser beam L3 power is 200W.
Laser beam L2 line focus mirror 4 focuses on matrix 6, forms cladding processing hot spot (circular solids hot spot, diameter 2mm)；Laser
Beam L3 is reflexed on matrix 6 through reflecting mirror 3, is formed and is preheated gentle cold light spot (ring-shaped light spot, internal diameter 3mm, outer diameter 5mm),
As shown in Figure 3.
Laser gain material manufacturing process is as shown in figure 4, matrix 6 and formed powder are all made of 304L stainless steel, laser scanning speed
Degree is 6mm/s, and the scan path shown in Fig. 4 shapes four single layer 304L stainless steel cladding layers.
By the Experimental comparison of drip molding thermal field cloud atlas, stress field cloud atlas, the utility model is further demonstrated compared to existing
There is technology, temperature gradient can be effectively reduced in cladding process, reduce the thermal stress in forming process, crack defect is inhibited to produce
It is raw.
Claims (7)
1. a kind of device that the laser gain material with preheating and slow cooling function manufactures, it is characterised in that: become including laser, optical path
It changes and focusing system and the workbench for placing matrix, the laser beam of the laser output is in light chopper and focusing system
Middle generation energy beam splitting forms two-stage energy, and wherein first order energy is processed to cladding, is finally radiated at corresponding on matrix
Solid hot spot is located at the center of whole hot spot, is denoted as center spot；Energy corresponding hot spot in the second level is around the center light
The ring-shaped light spot of spot, to realize preheating and slow cooling.
2. the device according to claim 1 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that: institute
It states light chopper and focusing system includes the beam splitter of taper, the reflecting mirror of generally ring structure and for described point of transmission
The focus lamp of the laser beam focus of Shu Jing, the beam splitter, reflecting mirror and focus lamp and incident laser beam are coaxial, reflecting mirror
Reflecting surface is curved reflecting surface, and the laser beam of laser output, which is incident on beam splitter, is divided into transmitted light beam and the reflected beams, thoroughly
Irradiating light beam ultimately forms the center spot, and the reflected beams reflex to center spot periphery through the reflecting mirror again, described in formation
Ring-shaped light spot.
3. the device according to claim 2 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that: institute
Beam splitter is stated as cone, taper is 90 degree；Correspondingly, the transmitted light beam ultimately forms circular center spot.
4. the device according to claim 2 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that: institute
It states reflecting mirror and is also configured with position adjusting mechanism, for adjusting the angle of curved reflecting surface, to change the size of ring-shaped light spot.
5. the device according to claim 4 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that: institute
It states reflecting mirror and integrally forms the ring structure by multiple discrete components, the position adjusting mechanism can be adjusted independently respectively
The angle of section curved reflecting surface.
6. the device according to claim 2 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that: institute
The material of beam splitter is stated as K9 glass or quartz, and surface coating, to realize that fractional transmission, part reflect.
7. the device according to claim 1 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that: institute
Stating laser is optical fiber laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820959482.7U CN208513642U (en) | 2018-06-21 | 2018-06-21 | A kind of device that the laser gain material with preheating and slow cooling function manufactures |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820959482.7U CN208513642U (en) | 2018-06-21 | 2018-06-21 | A kind of device that the laser gain material with preheating and slow cooling function manufactures |
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| CN208513642U true CN208513642U (en) | 2019-02-19 |
Family
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|---|---|---|---|
| CN201820959482.7U Withdrawn - After Issue CN208513642U (en) | 2018-06-21 | 2018-06-21 | A kind of device that the laser gain material with preheating and slow cooling function manufactures |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110548989A (en) * | 2019-09-06 | 2019-12-10 | 深圳市大德激光技术有限公司 | Waveform control method and system for laser welding of precise structural part of power battery |
| CN110560688A (en) * | 2019-09-23 | 2019-12-13 | 华中科技大学 | Additive manufacturing method |
| CN111286732A (en) * | 2020-02-24 | 2020-06-16 | 厦门大学 | Efficient laser cladding head capable of self-preheating powder feeding in hollow light |
| CN112247147A (en) * | 2020-09-28 | 2021-01-22 | 苏州祝友三维科技有限公司 | Double-laser additive manufacturing synchronous heat treatment device and application |
| CN112793155A (en) * | 2020-12-18 | 2021-05-14 | 华南理工大学 | Cartilage repair device and method adopting parallel mechanical arm 3D printing |
| CN113381270A (en) * | 2021-04-21 | 2021-09-10 | 深圳市瑞沃德生命科技有限公司 | Laser and have its laser physiotherapy device |
| CN116837378A (en) * | 2023-08-29 | 2023-10-03 | 山东镭研激光科技有限公司 | Laser cladding feeding device |
-
2018
- 2018-06-21 CN CN201820959482.7U patent/CN208513642U/en not_active Withdrawn - After Issue
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108453261B (en) * | 2018-06-21 | 2023-08-15 | 北京万维增材科技有限公司 | Laser additive manufacturing device with preheating and slow cooling functions |
| CN110548989A (en) * | 2019-09-06 | 2019-12-10 | 深圳市大德激光技术有限公司 | Waveform control method and system for laser welding of precise structural part of power battery |
| CN110548989B (en) * | 2019-09-06 | 2020-06-19 | 深圳市大德激光技术有限公司 | Waveform control method and system for laser welding of precise structural part of power battery |
| CN110560688A (en) * | 2019-09-23 | 2019-12-13 | 华中科技大学 | Additive manufacturing method |
| CN111286732A (en) * | 2020-02-24 | 2020-06-16 | 厦门大学 | Efficient laser cladding head capable of self-preheating powder feeding in hollow light |
| CN112247147A (en) * | 2020-09-28 | 2021-01-22 | 苏州祝友三维科技有限公司 | Double-laser additive manufacturing synchronous heat treatment device and application |
| CN112793155A (en) * | 2020-12-18 | 2021-05-14 | 华南理工大学 | Cartilage repair device and method adopting parallel mechanical arm 3D printing |
| CN112793155B (en) * | 2020-12-18 | 2022-06-24 | 华南理工大学 | Cartilage repair device and method adopting parallel mechanical arm 3D printing |
| CN113381270A (en) * | 2021-04-21 | 2021-09-10 | 深圳市瑞沃德生命科技有限公司 | Laser and have its laser physiotherapy device |
| CN116837378A (en) * | 2023-08-29 | 2023-10-03 | 山东镭研激光科技有限公司 | Laser cladding feeding device |
| CN116837378B (en) * | 2023-08-29 | 2023-11-17 | 山东镭研激光科技有限公司 | Laser cladding feeding device |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20230710 Address after: 2119, 21st Floor, Building 1, No. 6 Beixiaomachang, Haidian District, Beijing, 100038 Patentee after: Beijing Wanwei Additive Technology Co.,Ltd. Address before: 710300 A3 / F, Xihu technology business incubator, east section of LV highway, Weiyi District, Xi'an City, Shaanxi Province Patentee before: NATIONAL INSTITUTE CORPORATION OF ADDATIVE MANUFACTURING, XI'AN |
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Granted publication date: 20190219 Effective date of abandoning: 20230815 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190219 Effective date of abandoning: 20230815 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |