CN105033250B - A kind of coaxial double light beam laser preheating shapes slow cooling stress delayed release device and method - Google Patents
A kind of coaxial double light beam laser preheating shapes slow cooling stress delayed release device and method Download PDFInfo
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Abstract
The invention discloses a kind of coaxial double light beam laser preheating shapes slow cooling stress delayed release device and method, including prolong that laser beam exits direction sets gradually for laser beam is expanded extender lenses, for by the collimation convex lenss of parallel for the laser beam after expanding output be used for the focusing convex lenss receiving collimated laser beam and exporting coaxial dual-beam, the convex surface center focusing on convex lenss is provided with plane A for parallel for laser beam output forms large spot A, laser beam focus are formed small light spot B by the convex portions focusing on convex lenss, and hot spot A, B are coaxial.The present invention passes through being applied in combination of convex lenss and concavees lens, produce the adjustable coaxial dual-beam of spot size, metal dust is preheated and slow cooling using large spot, improved the absorbance of material for laser light, alleviated stress, reduce thermograde, reduce the tissue defects such as segregation, crackle and hole, shaped using small light spot, good condensing performance, energy stabilization, improves forming efficiency, precision and quality.
Description
Technical field
The invention belongs to material increasing field is and in particular to one kind melts coaxial double light beam laser in shaping in selective laser
Preheating shapes slow cooling stress delayed release device and method.
Background technology
In typical case's generation that forming technique (Selective Laser Melting, SLM) is increasing material manufacturing, is melted in selective laser
Table, traditional three dimensional manufacturing processes are changed into plane manufacture-accumulation superposition process by it, successively melt realization by powder three-dimensional
The manufacture of complex precise parts, can manufacture and design auxiliary support structure because powder remains static, and be therefore suitable for almost
The manufacture of arbitrarily complicated shaped metal parts, can be widely applied to the industries such as Aero-Space, automobile, mould, medical treatment.
But in laser forming process, because superlaser provides thermal source successively to melt material and cool down rapidly, powder bed
It is subject to circulation heat effect, thermograde is big, and temperature field is unstable, and the laser absorption rate of different materials system is different.Au Laser
Belong in forming process, have two universal rulies：First, to commaterial, wavelength is longer, and the absorptance of material for laser light is got over
Low, wavelength is shorter, and the absorptance of material for laser light is higher；Second, metal temperature is higher, higher to the absorbance of laser.Cause
This, for the metal relatively low to laser absorption rate such as Cu, Al, shape presence very big difficulty during this metalloid using SLM.By right
Powder preheating can reduce the thermograde in forming process, improves thermo parameters method, the deformation of effective control drip molding and cracking
Problem, powder preheating simultaneously can improve the absorbance to laser for the powder to a certain extent, improves the utilization rate to energy for the powder.
And at present in selective laser fusing former, there is not yet shape the report of slow cooling using double light beam laser preheating.
Content of the invention
It is an object of the invention to provide a kind of coaxial double light beam laser preheating shapes slow cooling stress delayed release device and method,
Metal dust is preheated and slow cooling by spot size adjustable big small bore coaxial cable dual-beam, on the one hand can alleviate should
Power, the thermograde that reduces, reduction tissue defects, on the other hand can improve the absorbance to laser for the metal dust, improve metal
The forming efficiency of material, precision and quality.
For achieving the above object, the present invention adopts the following technical scheme that：
A kind of coaxial double light beam laser preheating shapes slow cooling stress delayed release device, including laser beam, and prolongs laser beam
Exit direction set gradually for laser beam is expanded extender lenses, for by parallel for the laser beam after expanding output
Collimation convex lenss and for receiving collimated laser beam and exporting the focusing convex lenss of coaxial dual-beam, wherein extender lenses can
In light path, movement carries out dynamic focusing, focuses on a diameter of D of convex lenss, and the convex surface center focusing on convex lenss is formed with directly
Footpath is plane A of d, D>D, plane A is used for parallel for collimated laser beam output forms the hot spot A of a diameter of d, focuses on convex lenss
Convex portions are used for for collimated laser beam focusing on the hot spot B forming a diameter of d ', and hot spot A is coaxial with hot spot B, and d>d’.
Described focusing convex lenss are planoconvex lenss, and its convex surface side is light incident side, and plane side is exiting side, and it is incident
Plane A of side is with the planar coaxial of exiting side and parallel to each other.
Described collimation convex lenss are planoconvex lenss, and its plane side is light incident side, and convex surface side is exiting side.
Described extender lenses are to expand concavees lens or expand convex lenss.
The described concavees lens that expand are planoconcave lenses, and its plane side is light incident side, and concave side is exiting side；
The described convex lenss that expand are planoconvex lenss, and its plane side is light incident side, and convex surface side is exiting side.
The described concave surface center expanding concavees lens is formed with plane B of a diameter of d1, and its midplane B is used for making to swash
Parallel beam passes through, and the concave part expanding concavees lens is used for laser beam is expanded, and plane B expanding concavees lens is entered with it
Penetrate the planar coaxial of side and parallel to each other, expand a diameter of D1, D1 of concavees lens>D1, D1<D, d1=d；
The described convex surface center expanding convex lenss is formed with plane C of a diameter of d2, and its midplane C is used for making to swash
Parallel beam passes through, and the convex portions expanding convex lenss are used for laser beam is expanded, and plane C expanding convex lenss is entered with it
Penetrate the planar coaxial of side and parallel to each other, expand a diameter of D2, D2 of convex lenss>D2, D2<D, d2=d.
The convex surface center of described collimation convex lenss is formed with plane D of a diameter of d3, and its midplane D is used for making to put down
The parallel transmission of laser beam of row, the convex portions of collimation convex lenss are used for, by parallel for the laser beam after expanding output, collimating convex lens
Plane D of mirror is with the planar coaxial of its light incident side and parallel to each other, a diameter of D3, D3 of collimation convex lenss>D3, D3=D, d3=
d.
Coaxial double light beam laser preheating shapes slow cooling stress release method, comprises the following steps：
A) regulate collimation convex lenss and the position of focusing convex lenss, be fixed；
B) laser beam enters to inject and expands concavees lens or expand convex lenss, through expanding concavees lens or expanding after convex lenss expand
Enter collimation convex lenss, collimated pass through again to focus on convex lenss form coaxial dual-beam, the wherein convex surface part of focusing convex lenss
Divide the hot spot B that the laser beam focus after collimation are formed a diameter of d ', plane A focusing on convex lenss makes the laser beam after collimation
Parallel output forms the hot spot A of a diameter of d, and hot spot B is in the center of hot spot A；
C) pass through to adjust to expand concavees lens or the displacement expanding convex lenss, using dynamic focusing optical lever principle,
Realize the focusing of different size of hot spot B；
D) during selective laser fusing shapes, metal dust is preheated and slow cooling using hot spot A, using hot spot
B shapes, you can obtain required parts.
Described metal dust includes Cu powder, Al powder and its mixture.
The invention has the advantages that：
The coaxial double light beam laser preheating that the present invention provides shapes slow cooling stress delayed release device, in the exit direction of laser beam
On set gradually extender lenses, collimation convex lenss and focus on convex lenss, the effect of wherein extender lenses is will be incident quasi-parallel
Laser beam expands, and to reduce the laser energy density on collimation convex lenss and focusing concavees lens, plays the effect of protection eyeglass；Accurate
The effect of straight convex lenss is by the parallel output of the laser beam expanding via extender lenses；Focus on the effect of the convex portions of convex lenss
It is that collimation collimated light beam is focused on the hot spot B (small light spot) forming a diameter of d ', acting as of plane A on focusing convex lenss will
The parallel output of collimated light beam collimation forms the hot spot A (large spot) of a diameter of d, and hot spot B is in the center of hot spot A, and by
In the position-adjustable of extender lenses, the size of therefore hot spot B is adjustable such that it is able to produce the same axis dual-light of different spot sizes
Bundle.Metal dust is preheated and slow cooling using hot spot A (large spot), hot spot B (small light spot) fusing shapes, can alleviate should
Power, reduces thermograde, reduces the tissue defects such as segregation, crackle and hole, solves the material for laser light absorbances such as aluminium alloy low
Problem, improve the forming efficiency of material, precision and the quality such as aluminium alloy.
The coaxial double light beam laser preheating that the present invention provides shapes slow cooling stress release method, by convex lenss and concavees lens
Be applied in combination, produce the adjustable coaxial dual-beam of spot size, metal dust is preheated and slow cooling using large spot,
Can improve the absorbance of material for laser light, alleviate stress, reduce the thermograde in forming process, reduce segregation, crackle and
The tissue defects such as hole, are shaped using small light spot, good condensing performance, energy stabilization, it is possible to increase forming efficiency, precision and matter
Amount.The method not only can carry out selective laser fusing shaping by the metal dust higher to laser absorption rate, also can be to laser absorption
The relatively low metal dust of rate (including Cu powder, Al powder and its mixture, alloy etc.) carries out selective laser fusing and shapes, and can improve
Thermo parameters method, the deformation of effective control drip molding and problem of Cracking, can improve the utilization rate to energy for the powder, finally simultaneously
Reach the purpose improving drip molding quality.
Brief description
Fig. 1 be the present invention using without plane B expand concavees lens and without plane D collimation convex lenss carry out coaxial
Double light beam laser preheating shapes the schematic diagram of slow cooling stress release method；
Fig. 2 is the present invention using expanding concavees lens and the collimation same axis dual-light that carries out of convex lenss with plane D with plane B
Shu Jiguang preheating shapes the schematic diagram of slow cooling stress release method；
Fig. 3 be the present invention using without plane C expand convex lenss and without plane D collimation convex lenss carry out coaxial
Double light beam laser preheating shapes the schematic diagram of slow cooling stress release method；
Fig. 4 is the present invention using expanding convex lenss and the collimation same axis dual-light that carries out of convex lenss with plane D with plane C
Shu Jiguang preheating shapes the schematic diagram of slow cooling stress release method；
Fig. 5 is the structural representation expanding concavees lens of the present invention, and wherein (a) is to expand concavees lens without plane B,
B () is to expand concavees lens with plane B；
Fig. 6 is the structural representation expanding convex lenss of the present invention, and wherein (a) is to expand convex lenss without plane C,
B () is to expand convex lenss with plane C；
Fig. 7 is the structural representation of the collimation convex lenss of the present invention, and wherein (a) is the collimation convex lenss without plane D,
B () is the collimation convex lenss with plane D；
Fig. 8 is the structural representation of the focusing convex lenss of the present invention；
The design sketch of the hot spot of the coaxial dual-beam that Fig. 9 is formed for the present invention；
Wherein, 1 be laser beam, 2 be expand concavees lens, 3 be collimation convex lenss, 4 be focus on convex lenss, 5 be expand convex lens
Mirror.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail：
Referring to Fig. 1 to Fig. 8, the coaxial double light beam laser preheating that the present invention provides shapes slow cooling stress delayed release device and includes swashing
Light beam 1, and prolong that the exit direction of laser beam 1 sets gradually for laser beam 1 is expanded extender lenses, for will
Collimation convex lenss 3 of the parallel output of the laser beam after expanding and for receiving collimated laser beam and exporting the focusing of coaxial dual-beam
Convex lenss 4；Extender lenses can move in light path and carry out dynamic focusing, and collimation convex lenss 3 and focusing convex lenss 4 collectively form
Object lens.
Wherein, extender lenses are to expand concavees lens 2 or expand convex lenss 5, and expand concavees lens 2 for planoconcave lenses, and it is straight
Footpath is D1, and its plane side is light incident side, and concave side is exiting side；Expanding convex lenss 5 is planoconvex lenss, its a diameter of D2,
Its plane side is light incident side, and convex surface side is exiting side.Collimation convex lenss 3 are planoconvex lenss, its a diameter of D3, its plane one
Side is light incident side, and convex surface side is exiting side.Focusing convex lenss 4 are planoconvex lenss, its a diameter of D, and its convex surface side is incidence
Side, plane side is exiting side.And D1<D, D2<D, D3=D.
And, focus on plane A that the center of the convex surface side of convex lenss 4 forms a diameter of d after sanding and polishing, put down
Face A is with the planar coaxial of exiting side focusing on convex lenss 4 and parallel to each other, and plane A is used for parallel for collimated laser beam output shape
Become the hot spot A of a diameter of d, the convex portions focusing on convex lenss 4 are used for for collimated laser beam focusing on the hot spot forming a diameter of d '
B, hot spot A are coaxial with hot spot B, D>D, d>d’.
Expand concavees lens 2, expand convex lenss 5 and the center of the collimation concave surface of convex lenss 3 or convex surface side can lead to
Cross sanding and polishing form plane B, plane C and plane D respectively it is also possible to do not carry out sanding and polishing process directly complete using having
The planoconcave lenses of concave surface or convex surface or planoconvex lenss.And using through sanding and polishing process after collimation convex lenss 3 when it is necessary to
When using expanding concavees lens 2 or expanding convex lenss 5 after processing through sanding and polishing, direct using the collimation with complete convex surface
It is necessary to simultaneously using having expanding concavees lens 2 or expanding convex lenss 5 of complete concave surface or convex surface during convex lenss 3.
, expanding when expanding concavees lens 2 (or expanding convex lenss 5) and collimation convex lenss 3 using after processing through sanding and polishing
The concave surface center of bundle concavees lens 2 is formed with plane B of a diameter of d1, and its midplane B is used for making the parallel transmission of laser beam 1,
The concave part expanding concavees lens 2 is used for laser beam 1 is expanded, and expands plane B of concavees lens 2 and the plane of its light incident side
Coaxial and parallel to each other, D1>D1, d1=d (or, the convex surface center expanding convex lenss 5 is formed with the plane of a diameter of d2
C, its midplane C are used for making the parallel transmission of laser beam 1, and the convex portions expanding convex lenss 5 are used for laser beam 1 is expanded,
Expand plane C of convex lenss 5 with the planar coaxial of its light incident side and parallel to each other, D2>D2, d2=d).Collimate the convex of convex lenss 3
Face center is formed with plane D of a diameter of d3, and its midplane D is used for making the parallel transmission of parallel laser beam, collimates convex lens
The convex portions of mirror 3 are used for collimating parallel for the laser beam after expanding output the plane with its light incident side for plane D of convex lenss 3
Coaxial and parallel to each other, D3>D3, d3=d.
The coaxial double light beam laser preheating that the present invention provides shapes slow cooling stress release method and comprises the following steps：
A) regulate collimation convex lenss 3 and the position focusing on convex lenss 4, be fixed；
B) laser beam 1 enters to inject to expand concavees lens 2 or expands convex lenss 5, through expanding concavees lens 2 or expanding convex lenss 5
Collimation convex lenss 3 are entered, the collimated focusing convex lenss 4 that pass through again form coaxial dual-beam, wherein focus on convex lenss 4 after expanding
Convex portions the laser beam focus after collimating are formed the hot spot B of a diameter of d ', plane A focusing on convex lenss 4 makes collimation
The parallel output of laser beam afterwards forms the hot spot A of a diameter of d, and hot spot B is in the center of hot spot A, as shown in Figure 9；
C) pass through to adjust the displacement expanding concavees lens 2 or expanding convex lenss 5, former using dynamic focusing optical lever
Reason, realizes the focusing of different size of hot spot B；
D) during selective laser fusing shapes, metal dust is preheated and slow cooling using hot spot A, it is possible to increase
The absorbance of material for laser light, alleviates stress, reduces thermograde, reduces the tissue defects such as segregation, crackle and hole, simultaneously profit
Shaped with hot spot B, good condensing performance, energy stabilization, it is possible to increase forming efficiency, precision and quality, by being total to of big small light spot
Same-action can be prepared by required parts.
Selective laser fusing shaping not only can be carried out by the metal dust higher to laser absorption rate by said method, also may be used
The metal dust (include Cu powder, Al powder and its mixture, alloy etc.) relatively low to laser absorption rate carries out selective laser and is fused into
Shape, can reduce the thermograde in forming process, improve thermo parameters method, and the deformation of effective control drip molding and cracking are asked
Topic, can improve the absorbance to laser for the powder simultaneously to a certain extent, improve the utilization rate to energy for the powder, finally improve into
The quality of shape part.
With reference to specific embodiment, the present invention is described in detail.
Embodiment 1
With reference to Fig. 1, optical lenses that the present embodiment adopts include without plane B expand concavees lens 2, without plane D
Collimation convex lenss 3 and the focusing convex lenss 4 with plane A.Wherein, with reference to Fig. 5 (a), expand a diameter of D1 of concavees lens 2, expand
The effect of bundle concavees lens 2 is to expand incident quasi-parallel laser beam 1, to reduce collimation convex lenss 3 and to focus on concavees lens 4
Laser energy density, plays the effect of protection eyeglass.With reference to Fig. 7 (a), a diameter of D3 of collimation convex lenss 3, collimate convex lenss 3
Act as via expanding the parallel output of laser beam 1 that convex lenss 2 expand.With reference to Fig. 8, focus on a diameter of D of convex lenss 4,
The center of its convex surface forms plane A of a diameter of d after sanding and polishing, focuses on the acting as of convex portions of convex lenss 4
Collimated light beam will be collimated and focus on the hot spot B forming a diameter of d ', acting as of plane A of focusing convex lenss 4 will be accurate by collimated light beam
Directly parallel output, forms the hot spot A of a diameter of d, thus producing the coaxial dual-beam of different spot sizes.Expanded recessed by regulation
The displacement of lens 2, using dynamic focusing optical lever principle, adjusts the size of hot spot B.In forming process, using hot spot A
Metal dust is preheated and slow cooling, shaped using hot spot B, you can carry out selective laser fusing and shape, required zero is obtained
Part.
Embodiment 2
With reference to Fig. 2, the optical lenses that the present embodiment adopts include expanding concavees lens 2, carrying plane D with plane B
Collimation convex lenss 3 and the focusing convex lenss 4 with plane A.Wherein, with reference to Fig. 5 (b), expand a diameter of D1 of concavees lens 2, its
The center of concave surface forms plane B of a diameter of d1 after sanding and polishing, and plane B makes laser beam 1 directly parallel transmission, no
Expanded, the effect expanding the concave part of concavees lens 2 is to expand incident quasi-parallel laser beam, to reduce collimation convex lens
Laser energy density on mirror 3 and focusing concavees lens 4, plays the effect of protection eyeglass.With reference to Fig. 7 (b), collimation convex lenss 3
A diameter of D3, the center of its convex surface forms plane D of a diameter of d3 after sanding and polishing, and plane D makes through plane B
Laser beam directly parallel transmission, acting as of the convex portions of collimation convex lenss 3 will be via the concave part expansion expanding convex lenss 2
The parallel output of laser beam of bundle.With reference to Fig. 8, focus on a diameter of D of convex lenss 4, the center of its convex surface is after sanding and polishing
Form plane A of a diameter of d, plane A makes the laser beam directly parallel transmission through plane D, form the hot spot A of a diameter of d
(bigger than the energy density of the hot spot A in embodiment 1), acting as of the convex portions of focusing convex lenss 4 will be via collimation convex lens
The collimated light beam of the convex portions collimation of mirror 3 focuses on the hot spot B forming a diameter of d ', thus producing the coaxial of different spot sizes
Dual-beam.By adjusting the displacement expanding concavees lens 2, using dynamic focusing optical lever principle, adjust the big of hot spot B
Little.In forming process, metal dust is preheated and slow cooling using hot spot A, shaped using hot spot B, you can carry out laser choosing
Area's fusing shapes, and required parts are obtained.
Embodiment 3
With reference to Fig. 3, optical lenses that the present embodiment adopts include without plane C expand convex lenss 5, without plane D
Collimation convex lenss 3 and the focusing convex lenss 4 with plane A.Wherein, with reference to Fig. 6 (a), expand a diameter of D2 of convex lenss 5, expand
The effect of bundle convex lenss 5 is to expand incident quasi-parallel laser beam 1, to reduce collimation convex lenss 3 and to focus on concavees lens 4
Laser energy density, plays the effect of protection eyeglass.With reference to Fig. 7 (a), a diameter of D3 of collimation convex lenss 3, collimate convex lenss 3
Act as via expanding the parallel output of laser beam 1 that convex lenss 2 expand.With reference to Fig. 8, focus on a diameter of D of convex lenss 4,
The center of its convex surface forms plane A of a diameter of d after sanding and polishing, focuses on the acting as of convex portions of convex lenss 4
Collimated light beam will be collimated and focus on the hot spot B forming a diameter of d ', acting as of plane A of focusing convex lenss 4 will be accurate by collimated light beam
Directly parallel output, forms the hot spot A of a diameter of d, thus producing the coaxial dual-beam of different spot sizes.Expanded convex by regulation
The displacement of lens 5, using dynamic focusing optical lever principle, adjusts the size of hot spot B.In forming process, using hot spot A
Metal dust is preheated and slow cooling, shaped using hot spot B, you can carry out selective laser fusing and shape, required zero is obtained
Part.
Embodiment 4
With reference to Fig. 4, the optical lenses that the present embodiment adopts include expanding convex lenss 5, carrying plane D with plane C
Collimation convex lenss 3 and the focusing convex lenss 4 with plane A.Wherein, with reference to Fig. 6 (b), expand a diameter of D2 of convex lenss 5, its
The center of convex surface forms plane C of a diameter of d2 after sanding and polishing, and plane C makes laser beam 1 directly parallel transmission, no
Expanded, the effect expanding the convex portions of convex lenss 5 is to expand incident quasi-parallel laser beam, to reduce collimation convex lens
Laser energy density on mirror 3 and focusing concavees lens 4, plays the effect of protection eyeglass.With reference to Fig. 7 (b), collimation convex lenss 3
A diameter of D3, the center of its convex surface forms plane D of a diameter of d3 after sanding and polishing, and plane D makes through plane C
Laser beam directly parallel transmission, acting as of the convex portions of collimation convex lenss 3 will be via the convex portions expansion expanding convex lenss 5
The parallel output of laser beam of bundle.With reference to Fig. 8, focus on a diameter of D of convex lenss 4, the center of its convex surface is after sanding and polishing
Form plane A of a diameter of d, plane A makes the laser beam directly parallel transmission through plane D, form the hot spot A of a diameter of d
(bigger than the energy density of the hot spot A in embodiment 3), acting as of the convex portions of focusing convex lenss 4 will be via collimation convex lens
The collimated light beam of the convex portions collimation of mirror 3 focuses on the hot spot B forming a diameter of d ', thus producing the coaxial of different spot sizes
Dual-beam.By adjusting the displacement expanding convex lenss 5, using dynamic focusing optical lever principle, adjust the big of hot spot B
Little.In forming process, metal dust is preheated and slow cooling using hot spot A, shaped using hot spot B, you can carry out laser choosing
Area's fusing shapes, and required parts are obtained.
Claims (9)
1. a kind of coaxial double light beam laser preheating shape slow cooling stress delayed release device it is characterised in that：Including laser beam (1), with
And prolong that the exit direction of laser beam (1) sets gradually for laser beam (1) is expanded extender lenses, for expanding
The collimation convex lenss (3) of the parallel output of laser beam afterwards and for receive collimated laser beam and export coaxial dual-beam focusing convex
Lens (4), wherein extender lenses can move in light path and carry out dynamic focusing, focus on a diameter of D of convex lenss (4), focus on
The convex surface center of convex lenss (4) is formed with plane A of a diameter of d, D>D, plane A is used for parallel for collimated laser beam output
Form the hot spot A of a diameter of d, the convex portions focusing on convex lenss (4) are used for for collimated laser beam focusing on a diameter of d's ' of formation
Hot spot B, hot spot A are coaxial with hot spot B, and d>d’；
The center of the concave surface of described extender lenses and collimation convex lenss (3) or convex surface side is formed with plane, or expands
Bundle lens and collimation convex lenss (3) have complete concave surface or convex surface；And the center of the convex surface side when collimation convex lenss (3)
When position is formed with plane, the center of the concave surface of extender lenses or convex surface side is also formed with plane；When collimation convex lenss
(3), when having complete convex surface, extender lenses also have complete concave surface or convex surface.
2. coaxial double light beam laser preheating according to claim 1 shape slow cooling stress delayed release device it is characterised in that：Institute
The focusing convex lenss (4) stated are planoconvex lenss, and its convex surface side is light incident side, and plane side is exiting side, its light incident side flat
The planar coaxial of face A and exiting side and parallel to each other.
3. coaxial double light beam laser preheating according to claim 1 shape slow cooling stress delayed release device it is characterised in that：Institute
The collimation convex lenss (3) stated are planoconvex lenss, and its plane side is light incident side, and convex surface side is exiting side.
4. coaxial double light beam laser preheating according to claim 3 shape slow cooling stress delayed release device it is characterised in that：Institute
The extender lenses stated are to expand concavees lens (2) or expand convex lenss (5).
5. coaxial double light beam laser preheating according to claim 4 shape slow cooling stress delayed release device it is characterised in that：Institute
The concavees lens (2) that expand stated are planoconcave lenses, and its plane side is light incident side, and concave side is exiting side；
The described convex lenss (5) that expand are planoconvex lenss, and its plane side is light incident side, and convex surface side is exiting side.
6. coaxial double light beam laser preheating according to claim 5 shape slow cooling stress delayed release device it is characterised in that：Institute
The concave surface center expanding concavees lens (2) stated is formed with plane B of a diameter of d1, and its midplane B is used for making laser beam (1)
Parallel transmission, the concave part expanding concavees lens (2) is used for laser beam (1) is expanded, and expands plane B of concavees lens (2)
With the planar coaxial of its light incident side and parallel to each other, expand a diameter of D1, D1 of concavees lens (2)>D1, D1<D, d1=d；
The described convex surface center expanding convex lenss (5) is formed with plane C of a diameter of d2, and its midplane C is used for making to swash
The parallel transmission of light beam (1), the convex portions expanding convex lenss (5) are used for laser beam (1) is expanded, and expand convex lenss (5)
The planar coaxial of plane C and its light incident side and parallel to each other, expand a diameter of D2, D2 of convex lenss (5)>D2, D2<D, d2=
d.
7. coaxial double light beam laser preheating according to claim 6 shape slow cooling stress delayed release device it is characterised in that：Institute
The convex surface center of the collimation convex lenss (3) stated is formed with plane D of a diameter of d3, and its midplane D is used for making parallel swashing
Parallel beam passes through, and the convex portions of collimation convex lenss (3) are used for, by parallel for the laser beam after expanding output, collimating convex lenss
(3) planar coaxial of plane D and its light incident side and parallel to each other, a diameter of D3, D3 of collimation convex lenss (3)>D3, D3=D,
D3=d.
8. a kind of preheating based on the coaxial double light beam laser described in any one in claim 1-7 shapes slow cooling stress slow release dress
The coaxial double light beam laser preheating put shapes slow cooling stress release method it is characterised in that comprising the following steps：
A) regulate the position of collimation convex lenss (3) and focusing convex lenss (4), be fixed；
B) laser beam (1) enters to inject to expand concavees lens (2) or expands convex lenss (5), through expanding concavees lens (2) or expanding convex lens
Mirror (5) expand after enter collimation convex lenss (3), collimated again pass through focus on convex lenss (4) formed coaxial dual-beam, wherein poly-
Laser beam focus after collimating are formed the hot spot B of a diameter of d ' by the convex portions of burnt convex lenss (4), focus on convex lenss (4)
Plane A make collimation after the parallel output of laser beam form the hot spot A of a diameter of d, hot spot B is in the center of hot spot A；
C) concavees lens (2) or the displacement expanding convex lenss (5) are expanded by regulation, former using dynamic focusing optical lever
Reason, realizes the focusing of different size of hot spot B；
D) during selective laser fusing shapes, metal dust is preheated and slow cooling using hot spot A, become using hot spot B
Shape, you can obtain required parts.
9. coaxial double light beam laser preheating according to claim 8 shape slow cooling stress release method it is characterised in that：Institute
The metal dust stated includes Cu powder, Al powder and its mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510378544.6A CN105033250B (en) | 2015-07-01 | 2015-07-01 | A kind of coaxial double light beam laser preheating shapes slow cooling stress delayed release device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510378544.6A CN105033250B (en) | 2015-07-01 | 2015-07-01 | A kind of coaxial double light beam laser preheating shapes slow cooling stress delayed release device and method |
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| US10766242B2 (en) | 2017-08-24 | 2020-09-08 | General Electric Company | System and methods for fabricating a component using a consolidating device |
| CN110039047A (en) * | 2018-01-13 | 2019-07-23 | 西安增材制造国家研究院有限公司 | Metal powder laser melts increasing material manufacturing device and its manufacturing process |
| CN108709164A (en) * | 2018-05-16 | 2018-10-26 | 德州尧鼎光电科技有限公司 | A kind of light source output Wavelength tuning device |
| CN109023351B (en) * | 2018-09-12 | 2021-01-05 | 中国人民解放军陆军装甲兵学院 | Preparation method of crack-free laser cladding amorphous coating |
| CN112276081B (en) * | 2020-09-30 | 2022-07-15 | 华中科技大学 | Double-beam SLM (selective laser melting) forming method and system giving consideration to forming efficiency and forming quality |
| CN112711143A (en) * | 2020-12-26 | 2021-04-27 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | High-energy laser emission tracking aiming system capable of continuously focusing |
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