CN106881872A - The multiwavelength laser welding method and multi-wave length laser device of laminated plastics - Google Patents
The multiwavelength laser welding method and multi-wave length laser device of laminated plastics Download PDFInfo
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- CN106881872A CN106881872A CN201611247943.XA CN201611247943A CN106881872A CN 106881872 A CN106881872 A CN 106881872A CN 201611247943 A CN201611247943 A CN 201611247943A CN 106881872 A CN106881872 A CN 106881872A
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- laser
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
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- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses the multiwavelength laser welding method and multi-wave length laser device of a kind of laminated plastics.Method and step includes：1）For the selectivity that the optical maser wavelength of laminated plastics to be welded absorbs, the laser of respective wavelength is selected；2）Using half-reflection and half-transmission eyeglass by the sharp combiner of different wave length, coaxial focusing makes solder joint coaxial to plastic layer to be welded；3）Position using the Laser Focusing point of collimation focusing mirror adjustment different wave length is consistent with different layers plastic contact surface, realizes that laminated plastics absorbs laser and thawing simultaneously.Multi-wave length laser device, including agent structure, light combination mirror piece bearing, light combination mirror piece, two-dimension translational adjustment frame, two-dimension translational adjustment frame rebound, the first fiber adapter, one-dimensional adjustment frame, one-dimensional adjustment frame rebound, the second fiber adapter pinboard, the second fiber adapter, collimation lens set.The present invention may not necessarily consider transmitance of the overlying plastic to laser, realize the diversity of material selection.
Description
Technical field
The present invention relates to multi-wavelength Plastic Welding field, specifically, it is related to a kind of based on multiwavelength laser
For the method and laser of Plastic Welding.
Background technology
The prerequisite of existing use laser welding is that one of two parts can be through laser and another part energy
Enough absorb laser.Most of plastics can allow enough laser lights, and matched another part can be by adding absorbent
It is converted into the material that can absorb laser beam（Zhang Huizhong, the experimental study and Numerical-Mode of thermoplastic laser transmission welding
Intend, in December, 2007）.
The plastic material that laser can be passed through can be water white transparency or coloured, but allowing for guarantee has
Enough laser passes through, and many materials are because two transparent plastic layers can not all absorb enough laser energy or light beam not
Possess enough penetration capacitys, so heating welding contact surface cannot be realized, it is impossible to laser welding effect.
Solve the above problems at present and realize that the technical scheme of Plastic Welding is mainly by the plastic material in heat effect area
The middle suitable laser absorbent of addition, increases absorption of the plastic material to laser.The Main Function of wherein laser absorbent is to inhale
The emittance that laser is sent is received, radiation energy heat energy is converted into, so that plastic molting.In general carbon black is most normal
Absorbent, the light wave of essentially all near infrared region can be absorbed by carbon black（Yang Kun, absorbent is to thermoplastic
The influence of laser transmission welding quality, publishing house：Laser technology, Vol.33.No.3 June, 2009）.Absorbent is made with carbon black
Laser weld can be made to darken, it is different from mother metal color, but many situations, Plastic Welding requirement finished product essence attractive in appearance
Cause, therefore the additive can not be used.Robert Arno et al. disclose a kind of transparent suction dedicated for laser projection welding
Receive dyestuff（Visibly transparent dyes for through-Transmission laser
welding.US6911262B2,2005.06.28）, transparent plastic welded seam can be obtained.The mode for adding absorbent can be straight
Connect to penetrating into absorbent in material to be welded, or absorbent is oozed to working of plastics surface to be welded, or it is to be welded at two pieces
The contact position spraying of part is upper or prints upper absorbent, and these modes are both needed to outer doping, to plastics to be welded and absorption
The selection of agent has certain requirement, is not necessarily suitable for all of plastic material to be welded.
Dukane groups are proposed a new laser welding system, and the additive for absorbing laser can not be used to carry out
Bright Plastic Welding, the system realizes laser plastic welding using 2 μm of lasers, and uptake is increased by adding transparent polymer,
Although additive is not used, transparent polymer is the increase in, it is identical that its mode increases absorbent.
According to above-mentioned analysis, technical problem present in current laser plastic welding is, layers of plastic material to be welded
A necessary printing opacity, an absorption light, so often lead to that absorbent or transparent polymer must be added, and just can ensure that material
Absorption to laser, and then the species of plastic material is limited, so as to be difficult to improve the difficulty of welding effect, speed.
The content of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of multi-wavelength of laminated plastics
Method for laser welding and multi-wave length laser device.
A kind of multiwavelength laser welding method of laminated plastics, step includes：
1）For the selectivity that the optical maser wavelength of laminated plastics to be welded absorbs, the laser of respective wavelength is selected, make different layers
The plastics main laser for absorbing selected wavelength respectively；
2）Using half-reflection and half-transmission eyeglass by the sharp combiner of different wave length, coaxial focusing makes solder joint same to plastic layer to be welded
Axle；
3）Position using the Laser Focusing point of collimation focusing mirror adjustment different wave length is consistent with different layers plastic contact surface, realizes
Laminated plastics absorbs laser and thawing simultaneously, integrally welded.
Step 2）During the sharp combiner of the different wave length, wherein beam of laser light-beam position is first fixed, then by changing
Become another beam laser beam position, two beam Laser Focusing focus centers of adjustment are coaxial.
Step 2）During the sharp combiner of the different wave length, wherein beam of laser beam and focus size, Ran Houtong are first fixed
Cross and change another beam laser beam spot size, two beam Laser Focusing focuses of adjustment overlap.
A kind of multi-wave length laser device of the laminated plastics of use methods described, including agent structure, light combination mirror piece bearing,
Light combination mirror piece, two-dimension translational adjustment frame, two-dimension translational adjustment frame rebound, the first fiber adapter, one-dimensional adjustment frame, one-dimensional tune
Whole frame rebound, the second fiber adapter pinboard, the second fiber adapter, collimation lens set；
Various lasers are fixed in agent structure by the first fiber adapter and the second fiber adapter, wherein being fixed on
Laser on one fiber adapter is maintained static, and the second fiber adapter is fixed on the second fiber adapter pinboard, the
Two fiber adapter pinboards are fixed in one-dimensional adjustment frame, and one-dimensional adjustment frame is fixed on two-dimension adjustment frame rebound, two dimension
Adjustment frame rebound is fixed in two-dimension translational adjustment frame, and two-dimension translational adjustment frame is fixed by two-dimension translational adjustment frame rebound
On the body construction；
Light combination mirror piece is fixed on light combination mirror piece bearing, and light combination mirror piece bearing is fixed on the body construction by connect-disconnect structure.
Described collimation lens set includes collimation lens and condenser lens two parts, and collimation lens set is slided by collimation lens
Dynamic screw assembly is realized adjusting up and down, obtains apart from the optimum position of material to be welded, and collimation lens slides screw assembly by standard
Straight lens group fixed screw component is fixed in agent structure, realizes that collimation lens set position is fixed and realizes that focus is fixed.
The beneficial effects of the invention are as follows：
1. the present invention uses agent structure for the multiple-wavelength laser of Plastic Welding, fiber adapter and realizes multiwavelength laser
The function that device output laser unites two into one；
2. the present invention passes through two-dimension translational adjusting bracket, two-dimension translational adjusting bracket rebound, one-dimensional adjusting bracket, one-dimensional adjusting bracket transition
Plate controls position and the distance of the output light light beam distance of laser another Laser Output Beam, so as to realize two
The mutually incoherent light beam of beam coincides with same position；
3. the present invention for Plastic Welding multiple-wavelength laser using light combination mirror piece bearing and light combination mirror piece by the different ripples of two beams
Laser Focusing long closes beam into a branch of mutually incoherent laser beam, and freely two solder joint height differences of control, realize different-thickness
To-be-welded pieces welding；
4. the present invention fixes a semiconductor laser optical fiber using the second fiber adapter pinboard；
5. the collimation of a branch of diverging light after the present invention realizes merging using collimation lens set；
6. the present invention slides the regulation that screw assembly realizes alignment collimated optical beam using collimation lens, obtains the collimated light beam for optimizing
Diameter and the angle of divergence；
7. the present invention is using the fixing function for realizing collimation lens set；
8. the present invention realizes firm laser welding, air-tightness and appearance requirement without adding absorbent；
9. the present invention may not necessarily consider transmitance of the overlying plastic to laser for the multiple-wavelength laser of Plastic Welding, realize
The diversity of material selection；
10. the present invention can select to use the multiple-wavelength laser of different wave length for the multiple-wavelength laser of Plastic Welding, can
To realize the welding of more plastic materials.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is structural representation of the invention.
In figure, agent structure 1, light combination mirror piece bearing 2, light combination mirror piece 3, two-dimension translational adjustment frame 4, two-dimension translational adjustment frame
Rebound 5, the first fiber adapter 6, one-dimensional adjustment frame 7, one-dimensional adjustment frame rebound 8, the second fiber adapter pinboard 9,
Second fiber adapter 10, collimation lens set 11, collimation lens slide screw assembly 12, collimation lens set fixed screw component
13。
Specific embodiment
A kind of multiwavelength laser welding method of laminated plastics, step includes：
1）For the selectivity that the optical maser wavelength of laminated plastics to be welded absorbs, the laser of respective wavelength is selected, make different layers
The plastics main laser for absorbing selected wavelength respectively；
2）Using half-reflection and half-transmission eyeglass by the sharp combiner of different wave length, coaxial focusing makes solder joint same to plastic layer to be welded
Axle；
3）Position using the Laser Focusing point of collimation focusing mirror adjustment different wave length is consistent with different layers plastic contact surface, realizes
Laminated plastics absorbs laser and thawing simultaneously, integrally welded.
Step 2）During the sharp combiner of the different wave length, wherein beam of laser light-beam position is first fixed, then by changing
Become another beam laser beam position, two beam Laser Focusing focus centers of adjustment are coaxial.
Step 2）During the sharp combiner of the different wave length, wherein beam of laser beam and focus size, Ran Houtong are first fixed
Cross and change another beam laser beam spot size, two beam Laser Focusing focuses of adjustment overlap.
As shown in figure 1, a kind of multi-wave length laser device of the laminated plastics of use methods described, including agent structure 1, conjunction
Beam eyeglass bearing 2, light combination mirror piece 3, two-dimension translational adjustment frame 4, two-dimension translational adjustment frame rebound 5, the first fiber adapter 6,
One-dimensional adjustment frame 7, one-dimensional adjustment frame rebound 8, the second fiber adapter pinboard 9, the second fiber adapter 10, collimation lens
Group 11.
Various lasers are fixed in agent structure 1 by the first fiber adapter 6 and the second fiber adapter 10, wherein
The laser being fixed on the first fiber adapter 6 is maintained static, and the second fiber adapter 10 is fixed on the second fiber adapter
On pinboard 9, the second fiber adapter pinboard 9 is fixed in one-dimensional adjustment frame 7, and one-dimensional adjustment frame 7 is fixed on two-dimension adjustment
On frame rebound 8, two-dimension adjustment frame rebound 8 is fixed in two-dimension translational adjustment frame 4, and two-dimension translational adjustment frame 4 is by two dimension
Translation adjustment frame rebound 5 is fixed in agent structure 1；
Light combination mirror piece 3 is fixed on light combination mirror piece bearing 2, and light combination mirror piece bearing 2 is fixed on agent structure 1 by connect-disconnect structure
On, the distance of the first fiber adapter of centre distance 6 of light combination mirror piece 3 can be calculated by laser fiber output beam parameter
Arrive.
Described collimation lens set 11 includes collimation lens and condenser lens two parts, and collimation lens set passes through collimation lens
Slide screw assembly 12 to realize adjusting up and down, obtain apart from the optimum position of material to be welded, collimation lens slides screw assembly 12
It is fixed in agent structure 1 by collimation lens set fixed screw component 13, realizes that collimation lens set position is fixed and realized
Focus is fixed.
Wherein, agent structure 1 be it is by mutual angled two through-hole structures that different wave length laser is integrated,
Multiwavelength laser light beam is closed beam and focused on by the heart in through-holes；Change the angle between two through holes, realize that different angles are incident
Laser beam；Change two through holes and centre distance, be capable of achieving different size different wave length laser beams and close beam；
Light combination mirror piece bearing 2 can use pluggable structure and different angled ramp structure designs, swash for different multi-wavelengths
Light use demand can conveniently replace different structure, the pluggable structure of size；The present invention uses the light combination mirror of inclined-plane 45° angle degree
Piece bearing fixes light combination mirror piece 3, realizes that orthogonal incident laser beam closes beam；Change light combination mirror piece bearing angle be 0 ~ 90 it
Between any angle, be capable of achieving two beam incident beams between angle for twice light combination mirror piece bearing angle laser beam close beam；More
Light combination mirror piece bearing face shaping is changed, the light combination mirror piece 3 for matching different outward appearances is used.
Light combination mirror piece 3 meets anti-reflection to wherein beam of laser light beam using plated film, high to another beam laser beam anti-, realizes
Different wave length, mutually incoherent laser beam close beam into a branch of mutually incoherent laser beam；Change different light combination mirror pieces 3
Coating structure, realizes the sharp combiner of multi-wavelength；Change different outward appearance eyeglasses, matching different structure light combination mirror piece bearing 2.
Two orientation that are mainly technically characterized by of two-dimension translational adjustment frame 4 are adjusted, by matching two-dimension translational adjustment frame mistake
The hole position of cab apron 5 and agent structure 1 is fixed on two-dimension translational adjustment rebound 5, is adjusted by left and right and up and down, changes matching
The laser beam position of the second fiber adapter 10, realizes that the laser facula can be with another beam laser light on light combination mirror piece 3
Beam size is consistent, and light beam is coaxial after closing beam.
Two-dimension translational adjustment frame rebound 5 is designed using slab construction, by matching the hole position of agent structure 1 and two-dimension translational
The hole position of adjustment frame 4 fixes the two, and changing the apparent size of the structure, hole position structure can match the agent structure 1 of different structure.
First fiber adapter 6 uses the plug-in fiber adapter of different size, the optical fiber for matching different core diameters
Wire jumper, realizes laser beam output to the light combination mirror piece 3 in agent structure 1；The specification of the first fiber adapter 1 is changed,
Realize that different size optical patchcord is connected.
One-dimensional adjustment frame 7 is regulation before and after one direction, for fixing fiber adapter pinboard and two-dimension adjustment frame transition
Plate, by front and rear regulation fiber adapter pinboard, and then adjusts spacing of second fiber adapter 10 apart from light combination mirror piece 3,
Realize that the laser beam of the second fiber adapter 10 of matching incides the spot size and another beam laser beam one of light combination mirror piece
Cause.
Two-dimension adjustment frame rebound 8 using vertical stratification design, by match two-dimension translational adjustment frame 4 screwed hole and
Screwed hole with two-dimension adjustment frame 7 fixes two structures, and changing the apparent size of the structure, hole position structure can match different knots
The agent structure 1 of structure.
Second fiber adapter pinboard 9 is designed using slab construction, while matching second using arc groove structure design
The arc structure of fiber adapter 10.
Second fiber adapter 10 is fixed using arc structure, and the arc structure can realize optical patchcord assembling while not
Interfere with the second fiber adapter pinboard 9；The component is set fiber adapter with vertical panel using vertical stratification design simultaneously
Meter is into a single integrated structure, without increasing hole position save space.
Collimation lens set 11 uses lens barrel structure fixed lens group, and lens barrel uses staircase structural model, and there is screwed hole side, thoroughly
Microscope group uses collimation lens and condenser lens composition, collimation lens and condenser lens to plate the anti-reflection film of multi-wavelength, realize low damage
Deplete beam output, while different to Refractive Index of Material for different wave length laser beams, using different curvature radius, thickness,
The lens group parameter such as numerical aperture, apparent size, realizes the collimation focusing of different wave length light beam and controls depth of focus, focal position,
Different focal ratio is used by collimation lens and condenser lens, focused spot size requirement is realized.
Collimation lens slides screw assembly 12 and uses screw thread pair structural screws, and small being threadedly secured in of point diameter collimates saturating
In the screwed hole of microscope group, can realize adjusting up and down in agent structure 1, and then change light beam focal position.Rear end diameter is big
Screw thread is fixed using collimation lens set fixed screw component.
The matching collimation lens that is mainly technically characterized by of collimation lens set fixed screw component 13 slides the straight of screw assembly
The big screw thread in footpath, the position of fixed collimation lens set 11.
Embodiment
Current plastic welding material is varied, the material without welding material and lower section welding material above open with
Optical characteristics, wavelength should be selected according to welding material, rather than changeless.Therefore symbolization realizes that case is retouched
State.
Plastic material to be welded is respectively A and B, and in the top of B material, both contact wherein A materials.Materials A is for ripple
The laser absorption of a length of Xnm is strong, and material B is strong to the laser absorption that wavelength is Ynm, while materials A is the laser suction of Ynm to wavelength
Receive weak, material B is to wavelength for the laser absorption of Xnm is weak.Selection wavelength is respectively the laser of Xnm and Ynm as LASER Light Source,
Wherein the absolute value of X is more than Y, and referred herein to wavelength is that the laser of Xnm is X lasers, and wavelength is Y laser for the laser of Ynm
Device, using optical fiber as beam Propagation device.X laser fibers are connected into the first fiber adapter 6, by the connection of Y laser fibers
Second fiber adapter 10.Being assembled to bevel angle using the light combination mirror piece 3 for being coated with Ynm45 ° of high-reflecting film and Xnm anti-reflection films is
On 45 ° of light combination mirror piece bearing 2, by adjusting two-dimension translational adjustment frame 4 up and down, by the hot spot of Y Laser Output Beams
Center overlaps with the spot center of X Laser Output Beams, by the front and rear one-dimensional adjustment frame 7 of regulation, the light that Y lasers are exported
Beam spot size is bigger than X laser output spot size.Two light beams are realized closing beam on light combination mirror piece 3, use parameter designing
Good radius of curvature and focal length ratio, be coated with the collimation lens of the collimation lens set of Xnm and Ynm anti-reflection films by Xnm laser beams
Two light beams while Ynm diverging laser beams, then are focused on same point, the point by collimation by the condenser lens of collimation lens set
On AB material contacting surfaces, then materials A absorbs Xnm laser and melts, and material B absorbs Ynm laser and melts, so as to realize multi-wavelength
Laser plastic welding.
Claims (7)
1. the multiwavelength laser welding method of a kind of laminated plastics, it is characterised in that step includes：
1）For the selectivity that the optical maser wavelength of laminated plastics to be welded absorbs, the laser of respective wavelength is selected, make different layers
The plastics main laser for absorbing selected wavelength respectively；
2）Using half-reflection and half-transmission eyeglass by the sharp combiner of different wave length, coaxial focusing makes solder joint same to plastic layer to be welded
Axle；
3）Position using the Laser Focusing point of collimation focusing mirror adjustment different wave length is consistent with different layers plastic contact surface, realizes
Laminated plastics absorbs laser and thawing simultaneously, integrally welded.
2. method according to claim 1, it is characterised in that step 2）It is first solid during the sharp combiner of the different wave length
Fixed wherein beam of laser light-beam position, then by changing another beam laser beam position, in two beam Laser Focusing focuses of adjustment
The heart is coaxial.
3. method according to claim 1, it is characterised in that step 2）It is first solid during the sharp combiner of the different wave length
Fixed wherein beam of laser beam and focus size, then by changing another beam laser beam spot size, two beam laser of adjustment gather
Focus overlaps.
4. a kind of multi-wave length laser device using the laminated plastics of method according to claim 1, it is characterised in that including
Agent structure（1）, light combination mirror piece bearing（2）, light combination mirror piece（3）, two-dimension translational adjustment frame（4）, two-dimension translational adjustment frame transition
Plate（5）, the first fiber adapter（6）, one-dimensional adjustment frame（7）, one-dimensional adjustment frame rebound（8）, the second fiber adapter switching
Plate（9）, the second fiber adapter（10）, collimation lens set（11）；
Various lasers pass through the first fiber adapter（6）With the second fiber adapter（10）It is fixed to agent structure（1）On, its
In be fixed on the first fiber adapter（6）On laser maintain static, the second fiber adapter（10）It is fixed on the second optical fiber
Adapter pinboard（9）On, the second fiber adapter pinboard（9）It is fixed on one-dimensional adjustment frame（7）On, one-dimensional adjustment frame（7）
It is fixed on two-dimension adjustment frame rebound（8）On, two-dimension adjustment frame rebound（8）It is fixed on two-dimension translational adjustment frame（4）On, two dimension
Translation adjustment frame（4）By two-dimension translational adjustment frame rebound（5）It is fixed on agent structure（1）On.
5. the multi-wave length laser device of the laminated plastics of method according to claim 1, it is characterised in that light combination mirror piece（3）
It is fixed on light combination mirror piece bearing（2）On, light combination mirror piece bearing（2）Agent structure is fixed on by connect-disconnect structure（1）On.
6. the multi-wave length laser device of the laminated plastics of method according to claim 1, it is characterised in that described light combination mirror
Piece（3）Meet anti-reflection to wherein beam of laser light beam using plated film, it is high to another beam laser beam anti-, realize different wave length, mutually
Incoherent laser beam closes beam into a branch of mutually incoherent laser beam.
7. multi-wave length laser device according to claim 4, it is characterised in that described collimation lens set（11）Comprising standard
Straight lens and condenser lens two parts, collimation lens set slide screw assembly by collimation lens（12）Realization is adjusted up and down, is obtained
To apart from the optimum position of material to be welded, collimation lens slides screw assembly（12）By collimation lens set fixed screw component
（13）It is fixed on agent structure（1）On, realize that collimation lens set position is fixed and realizes that focus is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611247943.XA CN106881872A (en) | 2016-12-29 | 2016-12-29 | The multiwavelength laser welding method and multi-wave length laser device of laminated plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611247943.XA CN106881872A (en) | 2016-12-29 | 2016-12-29 | The multiwavelength laser welding method and multi-wave length laser device of laminated plastics |
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| CN1303756A (en) * | 1999-12-23 | 2001-07-18 | 莱斯特加工技术公司 | Method of heating at least two component through laser beam with high energy flux and its apparatus |
| US20040231788A1 (en) * | 2003-05-22 | 2004-11-25 | Jie-Wei Chen | Laser joining method for structured plastics |
| JP2005066629A (en) * | 2003-08-22 | 2005-03-17 | Human Design Authority Inc | Joint method of transparent material with ultrashort light pulse, material joint device, and joint material |
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| CN103944069A (en) * | 2014-05-09 | 2014-07-23 | 西安炬光科技有限公司 | High-power semiconductor laser beam combining device |
| CN104741779A (en) * | 2015-04-22 | 2015-07-01 | 深圳市创鑫激光股份有限公司 | Laser output head and laser machining machine |
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