CN105689890A - Annular laser welding head and annular laser welding method - Google Patents

Annular laser welding head and annular laser welding method Download PDF

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Publication number
CN105689890A
CN105689890A CN201610202372.1A CN201610202372A CN105689890A CN 105689890 A CN105689890 A CN 105689890A CN 201610202372 A CN201610202372 A CN 201610202372A CN 105689890 A CN105689890 A CN 105689890A
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CN
China
Prior art keywords
piece
conical lenses
collimating mirror
annular laser
focus lamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610202372.1A
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Chinese (zh)
Inventor
徐国建
田希玉
李春光
祝影
郭云强
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Shenyang University of Technology
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Shenyang University of Technology
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Filing date
Publication date
Application filed by Shenyang University of Technology filed Critical Shenyang University of Technology
Priority to CN201610202372.1A priority Critical patent/CN105689890A/en
Publication of CN105689890A publication Critical patent/CN105689890A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/073—Shaping the laser spot
    • B23K26/0734—Shaping the laser spot into an annular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention relates to an annular laser welding head. The annular laser welding head is characterized in that the welding head is sequentially provided with a collimating mirror, a first circular cone lens, a second circular cone lens and a focusing lens from top to bottom; and the first circular cone lens and the second circular cone lens are placed in a manner that vertex angles are opposite, and the degrees of the vertex angles are equal. When the annular laser welding head conducts welding, laser beam energy density Gaussian distribution can be effectively avoided, the defect that high polymer materials and metal materials are prone to occurring defects such as ablation and air holes in centers of welding lines can be reduced, and the welding quality of the high polymer materials is improved.

Description

Loop laser plumb joint and loop laser welding method
Technical field
The present invention relates to technical field of laser processing, the specifically special laser welding system of macromolecular material and metal material field and welding method。
Background technology
Macromolecular material has that density is little, intensity is high and the advantage such as corrosion resistance is good, and application in the industry is increasingly extensive。Can not pass through once extruded for baroque plastic, by interconnection technique, each parts need to be coupled together。Compared with Conventional attachment methods (Vibration welding and hot plate welding), it is fast that laser weld has speed, and the advantages such as surface forming quality is good enjoy favor in high-end manufacturing industry。
Common laser plumb joint beam energy density is Gauss distribution, and Heating Zone Temperature substantially also presents Gauss distribution, defines heating-up temperature in the middle of weld seam high, and periphery heating-up temperature is low, and macromolecular material the defect such as ablation, pore easily occurs at Weld pipe mill。
Summary of the invention
Goal of the invention:
The present invention provides a kind of loop laser plumb joint and loop laser welding method, the problem that when its objective is to solve conventional hot spot welding macromolecular material, centre is easily generated cracking defect, it improves the property of welded joint of macromolecular material and metal material, energy-saving and emission-reduction, improves production efficiency。
Technical scheme:
A kind of loop laser plumb joint, it is characterized in that: this plumb joint sets gradually collimating mirror, first piece of Conical Lenses, second piece of Conical Lenses and focus lamp from top to bottom, first piece of Conical Lenses and second piece of Conical Lenses are that drift angle is staggered relatively, and corner angle is identical。
This collimating mirror, first piece of Conical Lenses, second piece of Conical Lenses and focus lamp are coaxial from top to bottom。
Utilize the loop laser welding method that above-mentioned loop laser plumb joint is implemented, it is characterized in that: laser beam irradiation optical fiber issuing side sent is to collimating mirror, laser beam is to the focal length that distance is collimating mirror of collimating mirror, and laser beam becomes collimated light beam after collimating mirror, and its diameter is D；Make to be irradiated to first piece of Conical Lenses through the collimated light beam after collimating mirror, be then refracted on second piece of Conical Lenses, make to form external diameter 2R through the light beam after second piece of Conical Lenses1With internal diameter 2r1Big annular laser beams, then then through annular laser beams through focus lamp reflect after, formed external diameter 2R2With internal diameter 2r2Little annular laser beams。
The coaxial performance of collimating mirror, first piece of Conical Lenses, second piece of Conical Lenses and focus lamp will directly influence the density distributions of little annular laser beams, in addition the focal length size of distance between collimating mirror focal length, first piece of Conical Lenses and second piece of Conical Lenses and focus lamp, by the uniformity of the spot size and energy density distribution that directly affect little annular laser beams。
By changing collimating mirror focal length, distance between focus lamp focal length and first piece of Conical Lenses and second piece of Conical Lenses changes annular laser beams spot size, to adapt to the welding requirements of different working condition。
Advantage and effect
The present invention is a kind of loop laser plumb joint and loop laser welding method, and it utilizes optical fiber transmission laser and optical shaping system, have studied the formation basic theory of annular laser beams。In order to form annular laser beams, the light beam sent by fiber-optic output forms ring-shaped light spot after collimating mirror, Conical Lenses and focus lamp shaping, this beam energy density is symmetric to both sides from beam center, beam center energy density is low, both sides energy density is slightly higher, when avoiding conventional hot spot welding macromolecular material, centre is easily generated cracking problem, and can improve the welding performance of macromolecular material significantly。
Laser beam energy density Gauss distribution can be prevented effectively from when the present invention welds, macromolecular material and metal material can be reduced the appearance of the defect such as ablation, pore easily occurs at Weld pipe mill, improve macromolecular material welding quality。
Accompanying drawing explanation
Fig. 1 is the structural representation of the plumb joint of the present invention；
Fig. 2 is the density distributions of annular laser beams。
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described further:
As shown in Figure 1, the present invention proposes a kind of loop laser plumb joint, it is staggered relatively in drift angle that this plumb joint sets gradually collimating mirror 2, second piece of Conical Lenses 3 of 1, first piece of Conical Lenses and focus lamp 4, first piece of Conical Lenses 2 and second piece of Conical Lenses 3 from top to bottom, and corner angle is identical。
This collimating mirror 2, second piece of Conical Lenses 3 of 1, first piece of Conical Lenses and focus lamp 4 are coaxial from top to bottom。
Loop laser welding method, laser beam irradiation optical fiber issuing side sent is to collimating mirror 1, and laser beam is to the focal length that distance is collimating mirror of collimating mirror, and laser beam becomes collimated light beam after collimating mirror 1, and its diameter is D；Make to be irradiated to first piece of Conical Lenses 2 through the collimated light beam after collimating mirror, be then refracted on second piece of Conical Lenses 3, make to form external diameter 2R through the light beam after second piece of Conical Lenses1With internal diameter 2r1Big annular laser beams, then then through annular laser beams through focus lamp 4 reflect after, formed external diameter 2R2With internal diameter 2r2Little annular laser beams。
The coaxial performance of collimating mirror 2, second piece of Conical Lenses 3 of 1, first piece of Conical Lenses and focus lamp 4 will directly influence the density distributions of little annular laser beams, in addition the focal length size of collimating mirror 1 focal length, distance between first piece of Conical Lenses 2 and second piece of Conical Lenses 3 and focus lamp 4, by the uniformity of the spot size and energy density distribution that directly affect little annular laser beams。
By changing collimating mirror focal length, distance between focus lamp focal length and first piece of Conical Lenses 2 and second piece of Conical Lenses 3 changes annular laser beams spot size, to adapt to the welding requirements of different working condition。
Embodiment:
The present embodiment selects collimating mirror focal length to be f=60mm, regulates the distance 61.5mm between two pieces of circle lens, by the coaxial performance of three pieces of circular cones is adjusted, and by the energy density distribution of light beam measuring instrument measure annular light beam, it is thus achieved that external diameter 2R1=55mm, internal diameter 2r1=44.2mm, its light ring width W=5.4mm, the uniform annular laser beams larger in size of energy density distribution。Owing to the light beam after second piece of Conical Lenses is collimated light beam, and vertical irradiation is to focus lamp, therefore the focus characteristics of light beam is almost affected by second piece of distance size between Conical Lenses and focus lamp, keep the spacing 15mm of second piece of Conical Lenses and focus lamp constant, below second piece of Conical Lenses, add the focus lamp of one piece of focal distance f=60mm。External diameter 2R is obtained at focal point2=2.0mm, internal diameter 2r2The less annular laser beams of size of=1.7mm and ring-shaped light spot width 0.15mm, this beam energy density is symmetric from beam center to both sides, beam center energy density is low, both sides energy density is slightly higher, as shown below, it is applicable to macromolecular material and the Metal Material Welding of easily cracking, the welding performance of macromolecular material and metal material can be improved significantly。

Claims (5)

1. a loop laser plumb joint, it is characterized in that: this plumb joint sets gradually collimating mirror (1), first piece of Conical Lenses (2), second piece of Conical Lenses (3) and focus lamp (4) from top to bottom, first piece of Conical Lenses (2) and second piece of Conical Lenses (3) are staggered relatively in drift angle, and corner angle is identical。
2. loop laser plumb joint according to claim 1, it is characterised in that: this collimating mirror (1), first piece of Conical Lenses (2), second piece of Conical Lenses (3) and focus lamp (4) are coaxial from top to bottom。
3. utilize the loop laser welding method that the loop laser plumb joint described in claim 1 is implemented, it is characterized in that: laser beam irradiation optical fiber issuing side sent is to collimating mirror (1), laser beam is to the focal length that distance is collimating mirror of collimating mirror, laser beam becomes collimated light beam after collimating mirror (1), and its diameter is D；Make to be irradiated to first piece of Conical Lenses (2) through the collimated light beam after collimating mirror, be then refracted on second piece of Conical Lenses (3), make to form external diameter 2R through the light beam after second piece of Conical Lenses1With internal diameter 2r1Big annular laser beams, then then through annular laser beams through focus lamp (4) reflect after, formed external diameter 2R2With internal diameter 2r2Little annular laser beams。
4. loop laser welding method according to claim 3, it is characterized in that: the coaxial performance of collimating mirror (1), first piece of Conical Lenses (2), second piece of Conical Lenses (3) and focus lamp (4) will directly influence the density distributions of little annular laser beams, in addition the focal length size of distance between collimating mirror (1) focal length, first piece of Conical Lenses (2) and second piece of Conical Lenses (3) and focus lamp (4), by the uniformity of the spot size and energy density distribution that directly affect little annular laser beams。
5. loop laser welding method according to claim 4, it is characterized in that: by changing collimating mirror focal length, distance between focus lamp focal length and first piece of Conical Lenses (2) and second piece of Conical Lenses (3) changes annular laser beams spot size, to adapt to the welding requirements of difference working condition。
CN201610202372.1A 2016-04-05 2016-04-05 Annular laser welding head and annular laser welding method Pending CN105689890A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
CN105689890A true CN105689890A (en) 2016-06-22

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105910555A (en) * 2016-06-27 2016-08-31 上海嘉强自动化技术有限公司 High-precision quasi-static system for detecting and correcting beam direction coaxality
CN106019609A (en) * 2016-08-02 2016-10-12 苏州艾思兰光电有限公司 Laser beam shaper for laser cleaning machine and shaping method thereof
CN106990540A (en) * 2017-05-26 2017-07-28 北京华岸科技有限公司 Optical beam transformation device and laser aid
CN107363416A (en) * 2017-07-12 2017-11-21 上海柏楚电子科技有限公司 A kind of laser ring cutter device and its control method
CN110435160A (en) * 2019-09-09 2019-11-12 广东利元亨智能装备股份有限公司 A kind of laser welding head and method for laser welding
CN114769626A (en) * 2022-04-27 2022-07-22 南京中科煜宸激光技术有限公司 Broadband laser cladding head for laser additive manufacturing system
WO2023098221A1 (en) * 2021-12-03 2023-06-08 武汉锐科光纤激光技术股份有限公司 Light beam generation method, apparatus, and device, storage medium, and electronic device

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JPH02161411A (en) * 1988-12-14 1990-06-21 Mitsubishi Electric Corp Laser beam machining head
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CN204221193U (en) * 2014-09-05 2015-03-25 南京煜宸激光科技有限公司 The two-way filler wire welding device of a kind of laser
CN204524549U (en) * 2015-04-17 2015-08-05 温州职业技术学院 A kind of bifocus recombination laser welding processing head
CN204975704U (en) * 2015-05-07 2016-01-20 北京万恒镭特机电设备有限公司 Laser seal welded device

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CN101202416A (en) * 2007-11-30 2008-06-18 中国科学院西安光学精密机械研究所 Light beam laser
CN204221193U (en) * 2014-09-05 2015-03-25 南京煜宸激光科技有限公司 The two-way filler wire welding device of a kind of laser
CN204524549U (en) * 2015-04-17 2015-08-05 温州职业技术学院 A kind of bifocus recombination laser welding processing head
CN204975704U (en) * 2015-05-07 2016-01-20 北京万恒镭特机电设备有限公司 Laser seal welded device

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105910555A (en) * 2016-06-27 2016-08-31 上海嘉强自动化技术有限公司 High-precision quasi-static system for detecting and correcting beam direction coaxality
CN105910555B (en) * 2016-06-27 2018-08-24 上海嘉强自动化技术有限公司 A kind of quasi-static system of detection correction beam direction alignment high-precision
CN106019609A (en) * 2016-08-02 2016-10-12 苏州艾思兰光电有限公司 Laser beam shaper for laser cleaning machine and shaping method thereof
CN106990540A (en) * 2017-05-26 2017-07-28 北京华岸科技有限公司 Optical beam transformation device and laser aid
CN107363416A (en) * 2017-07-12 2017-11-21 上海柏楚电子科技有限公司 A kind of laser ring cutter device and its control method
CN110435160A (en) * 2019-09-09 2019-11-12 广东利元亨智能装备股份有限公司 A kind of laser welding head and method for laser welding
WO2023098221A1 (en) * 2021-12-03 2023-06-08 武汉锐科光纤激光技术股份有限公司 Light beam generation method, apparatus, and device, storage medium, and electronic device
CN114769626A (en) * 2022-04-27 2022-07-22 南京中科煜宸激光技术有限公司 Broadband laser cladding head for laser additive manufacturing system

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Application publication date: 20160622