JPH01143784A - Dissimilar axis multi-focal point type laser beam converging device - Google Patents
Dissimilar axis multi-focal point type laser beam converging deviceInfo
- Publication number
- JPH01143784A JPH01143784A JP62300198A JP30019887A JPH01143784A JP H01143784 A JPH01143784 A JP H01143784A JP 62300198 A JP62300198 A JP 62300198A JP 30019887 A JP30019887 A JP 30019887A JP H01143784 A JPH01143784 A JP H01143784A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- flat
- focal point
- laser
- projecting
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 8
- 238000002844 melting Methods 0.000 abstract description 7
- 230000008018 melting Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 230000000644 propagated effect Effects 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
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
- B23K26/073—Shaping the laser spot
- B23K26/0738—Shaping the laser spot into a linear 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
- B23K26/02—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
- B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
- B23K26/0608—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams in the same heat affected zone [HAZ]
-
- 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
- B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Microscoopes, Condenser (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分針〉
本発明は、レーザ加工装置による表面改質、溶接、溶断
などに適用されるビーム集光装置に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Minute Hand> The present invention relates to a beam condensing device applied to surface modification, welding, fusing, etc. using a laser processing device.
〈従来の技術〉
レーザ加工装置は第９図に示すような構成で、レーザ発
振器１、全反射鏡２、出力鏡３、全反射鏡５、集光レン
ズ６、ワーク７よりなす、伝送ビーム４は集光系である
集光レンズ６によりワーク７上の焦点８に集光される。<Prior art> A laser processing device has a configuration as shown in FIG. is condensed to a focal point 8 on the workpiece 7 by a condensing lens 6 which is a condensing system.
第１０図は、ワーク７の材料温度とレーザ光の吸収率を
示しており、溶融点上及びそれ以上の温度にて吸収が甚
だしい。すなわち、レーザ加工に当ってレーザ吸収率を
考慮しないと溶断などの加工ができないことが判明する
。FIG. 10 shows the material temperature of the workpiece 7 and the absorption rate of laser light, and the absorption is severe at temperatures above the melting point and above. That is, it turns out that processing such as fusing cannot be performed unless the laser absorption rate is taken into consideration during laser processing.
〈発明が解決しようとする問題点〉
このように第９図に示すレーザ加工装置があり、第１０
図に示すように加工に当ってレーザ吸収があることが判
明しているが、次の問題点がある。<Problems to be solved by the invention> As described above, there is a laser processing apparatus shown in FIG.
As shown in the figure, it has been found that laser absorption occurs during processing, but there are the following problems.
■ 例えば第９図に示す１焦点レーザ光による深情は込
み溶接手段として、第１０図の特公昭５６−４９１９５
号で示すごとく、波長１０．６／ｊｌのＣＯ２レーザ光
のアルミニウムに対する吸収率の特性結果から、アルミ
ニウムが溶融すると吸収率が大幅に向上する特性を利用
して、予めＴＩＧ溶接で先行溶融させた領域にレーザ光
を後行照射させるというＴＩＧとレーザ光の併用溶接法
の有効性を提案している。しかしこの方法では、２つの
加熱手段が不可欠となるものである。■For example, as shown in Fig. 9, as a deep welding means using a single focus laser beam,
As shown in this issue, based on the characteristic results of the absorption rate of CO2 laser light with a wavelength of 10.6/jl for aluminum, the absorption rate increases significantly when aluminum is melted. We are proposing the effectiveness of a welding method using a combination of TIG and laser light, in which the region is irradiated with laser light in a backward direction. However, this method requires two heating means.
■ −点に集光させる焦点方式であるため、焼入れ、パ
ウダー肉盛などの表面処理への適用が困難である。- Since it is a focusing method that focuses light on a point, it is difficult to apply it to surface treatments such as hardening and powder overlay.
そこで、本発明は、ＴＩＧとレーザとの併用溶接を用い
ず、しかも１点集光でない異軸多焦点式レーザビーム集
光装置を提供する。Therefore, the present invention provides a different axis multifocal laser beam focusing device that does not use combined welding of TIG and laser and does not focus light on one point.
く問題点を解決するための手段〉
上述の目的を達成する本発明は、レーザ発振器及びビー
ム伝送系を経たビームを集光させるビーム集光装置にお
いて、
部分的に凸部で残りを平坦部としたレンズを嫂数個光軸
を一致させて配電したレンズ群であって、一方のレンズ
の凸部を他方のレンズの平坦部に対応させ、上記凸部の
中心どおしを異軸に形成したことを特徴とする。Means for Solving the Problems> The present invention achieves the above-mentioned objects by providing a beam concentrating device that condenses a beam that has passed through a laser oscillator and a beam transmission system. A group of lenses in which power is distributed by several lenses with their optical axes aligned, the convex part of one lens corresponds to the flat part of the other lens, and the centers of the convex parts are formed on different axes. It is characterized by what it did.
く作 用〉
伝送ビームの一部と残部が加工方向に所定距離おいて形
成でき、また凸部を蒲鉾型に形成すればフォーカスライ
ンを加工方向に所定距離おいてできる。Function: A part of the transmission beam and the remainder can be formed at a predetermined distance in the processing direction, and if the convex portion is formed in a semicircular shape, the focus line can be placed at a predetermined distance in the processing direction.
く爽 施 例〉
ここで、第１図ないし第８図を参照して本発明の詳細な
説明する。第１図ないし第３図、及び第７図は一実施例
で、第４図ないし第６図、及び第８図は他の実施例であ
る。第１図ないし第３図において、これは異軸多焦点集
光装置に係る。第１図において、２枚の平凸レンズ６Ａ
、６Ｂがあり、一方のレンズ６Ｂの凸部ｂＣと他方のレ
ンズ６Ａの平坦部ｆ、とが対応し、他方のレンズ６Ａの
凸部ｅｆ。EXAMPLES Here, the present invention will be described in detail with reference to FIGS. 1 to 8. 1 to 3 and 7 are one embodiment, and FIGS. 4 to 6 and 8 are other embodiments. In FIGS. 1 to 3, this relates to a different axis multifocal focusing device. In FIG. 1, two plano-convex lenses 6A
, 6B, the convex portion bC of one lens 6B corresponds to the flat portion f of the other lens 6A, and the convex portion ef of the other lens 6A.
ｇｈと一方のレンズ６Ｂの平坦部ａｂ、ｃｄとが対応し
ている。そして、この２枚の平凸レンズの光軸は合致さ
せであるが、それぞれの凸部ｂｅ、ｆｇの各中心は異軸
になっている。すなわち、第２図、第３図において、凸
部６Ｂ−Ａと平坦部６Ａ−Ｂとが対応し、平坦部６Ｂ−
Ｂと凸部６Ａ−Ａとが対応している。gh corresponds to flat portions ab and cd of one lens 6B. The optical axes of these two plano-convex lenses are aligned, but the centers of their respective convex portions be and fg are on different axes. That is, in FIGS. 2 and 3, the convex portion 6B-A and the flat portion 6A-B correspond to each other, and the flat portion 6B-
B corresponds to the convex portion 6A-A.
出力ビーム４の極く一部をレンズ６Ｂの凸部６Ｂ−Ａで
集光させ、レンズ６Ａの平坦部６Ａ−Ｂで直進させ、予
熱用焦点８Ａを結ぶ。A very small portion of the output beam 4 is condensed by the convex portion 6B-A of the lens 6B, and is made to travel straight through the flat portion 6A-B of the lens 6A to form a preheating focal point 8A.
出力ビーム４の大部分をレンズ６Ｂの平坦部６Ｂ−Ｂで
直進させ、レンズ６Ａの凸部６Ａ−Ａで集光させ、主溶
接焦点８Ｂを結ぶ。第７図にも示すごとく、焦点８Ａに
より、微小な先行溶融池１０を形成することにより、固
体金属よりも液体金属の方がレーザ吸収率が向上する効
果で先行溶融池１０に照射された焦点８Ｂのビームエネ
ルギーの吸収が高められ深漬は込みが可能となる。なお
本例に於て、第２図のレンズ６Ｂの平坦部ａｂ間に更に
凸部を設け、これと対応する第３図のｅｆ間に平坦部を
゛設けて、更に他の焦点を結ぶことにより、後熱もしく
は、後行溶融池を形成することも可能である。この効果
は、割れ感受性の高い金属の割れ防止や、再溶融時の気
孔浮上により気孔を除去することができる。Most of the output beam 4 is caused to travel straight through the flat portion 6B-B of the lens 6B, and is focused by the convex portion 6A-A of the lens 6A to form a main welding focal point 8B. As shown in FIG. 7, by forming a minute pre-molten pool 10 by the focal point 8A, the laser absorption rate of liquid metal is higher than that of solid metal, and the focus irradiates the pre-molten pool 10. Absorption of 8B beam energy is enhanced and deep immersion becomes possible. In this example, a convex portion is further provided between the flat portions ab of the lens 6B in FIG. 2, and a flat portion is provided between the corresponding flat portions ef in FIG. 3 to form another focal point. It is also possible to form a trailing heat or a trailing molten pool. This effect can prevent cracking of metals with high crack susceptibility and remove pores by floating them during remelting.
第４図ないし第６図において、これは熱処理・肉盛用異
軸多フォーカスライン集合系に係る。第４図において、
２枚のレンズ６Ａ。In FIGS. 4 to 6, this relates to a different axis multi-focus line collection system for heat treatment and overlay. In Figure 4,
Two lenses 6A.
６Ｂがあり、一方のレンズ６Ｂには平坦部ｂＣと蒲鉾型
（半円柱）部ａｂ、ｃｄがあり、他方のレンズ６Ａには
平坦部と半円柱部ｅｊとが存在する。そして、レンズ６
Ａの平坦部とレンズ６Ｂの半円柱部ａｂ、ｃｄとが対応
し、レンズ６への半円柱部ｏｆとレンズ６Ｂの平坦部ｂ
Ｃとが対応する。すなわち、第５図。6B, one lens 6B has a flat portion bC and semicylindrical portions ab and cd, and the other lens 6A has a flat portion and a semicylindrical portion ej. And lens 6
The flat part of A corresponds to the semi-cylindrical parts ab and cd of the lens 6B, and the semi-cylindrical part of to the lens 6 corresponds to the flat part b of the lens 6B.
C corresponds. That is, FIG.
第６図において、半円柱部ａｍ’ ｂｂ’ 、 ｃｃ’
ｄｄ’と第６図の平坦部が対応し、半円柱部ａｅ’ｆ
ｆ’と平坦部ｂｂ’ｃｃ’とが対応している。この結果
、９Ａ、９Ｂ、９Ｃに焦点が形成されて！。In FIG. 6, semi-cylindrical portions am'bb' and cc'
dd' corresponds to the flat part in Fig. 6, and the semi-cylindrical part ae'f
f' corresponds to the flat portion bb'cc'. As a result, focal points are formed at 9A, 9B, and 9C! .
ｎ、ｍのフォーカスラインが形成されるｇ出力ビーム４
の一部をレンズ６Ｂの２つの半円柱部（ａａ’ ｂ’
ｂ、 ｃｃ’ ｄ’ ｄ）で集光させ、レンズ６Ａの平
坦部を直進させて、予熱もしくは先行溶融用フォーカス
ライン９Ａ及び後熱もしくは後行溶融用フォーカスライ
ン９Ｃを結ぶ。また、出力ビーム４の残部をレンズ６Ｂ
の平坦部ｂｂ’ ｃ’ ｃを直進させ、レンズ６Ａの半
円柱部ｅｅ’ ｆ’ ｆで集光させて、主溶融用フォー
カスライン９Ｂを結ぶ。この９Ａ。g output beam 4 in which focus lines of n and m are formed.
A part of the two semi-cylindrical parts (aa'b'
b, cc'd' d), and the flat part of the lens 6A is moved straight to connect the focus line 9A for preheating or preceding melting and the focus line 9C for postheating or trailing melting. In addition, the remainder of the output beam 4 is transferred to the lens 6B.
The flat part bb'c' c of the lens 6A is caused to advance straight, and the semi-cylindrical part ee'f' f of the lens 6A focuses the light to connect the main melting focus line 9B. This 9A.
９Ｂ、９Ｃのフォーカスラインを第８図に示す如く、母
材１３上に、塗布もしくは溶射により付着させた肉盛用
パウダ１４に照射させろ。ここで、フォーカスライン９
Ａで肉盛パウダ１４の脱ガス（水分、バインダーなど）
を行い、フォーカスライン９Ｂで肉盛パウダを溶融させ
、フォーカスライン９Ｃで肉盛層の上部を再溶融するこ
とにより、残存気孔の除去を行うと共に、再加熱による
徐冷効果により割れ感受性の高い肉盛材の割れ発生を防
止した肉盛部１５を得る。なお、本例に於て、２つのレ
ンズ間距離ｇを可変構造とするととによゆ、例えば第１
と第３を肉盛面上でデフォーカスとし、肉盛進行方向に
照射域を拡大してエネルギーの集中化を避けることも可
能である。又本発明の集光レンズ群６Ａ、６Ｂと全反射
鏡間にビーム導波路（図示省略）を設け、伝送ビームそ
−ドの強度分布を台形状とすることにより、フォーカス
ライン方向のビーム強度分布を均一にすることもある。As shown in FIG. 8, the focus lines 9B and 9C are irradiated onto the overlay powder 14 that has been deposited on the base material 13 by coating or thermal spraying. Here, focus line 9
Degassing the overlay powder 14 (moisture, binder, etc.) at A
By melting the build-up powder at focus line 9B and remelting the upper part of the build-up layer at focus line 9C, remaining pores are removed, and the slow cooling effect of reheating removes the meat that is highly susceptible to cracking. A built-up part 15 is obtained in which cracking of the built-up material is prevented. In this example, if the distance g between the two lenses is made variable, for example, the first
It is also possible to avoid concentration of energy by defocusing and third on the build-up surface and expanding the irradiation area in the build-up progressing direction. Furthermore, by providing a beam waveguide (not shown) between the converging lens groups 6A, 6B and the total reflection mirror of the present invention, and making the intensity distribution of the transmitted beam beam trapezoidal, the beam intensity distribution in the focus line direction can be improved. may be made uniform.
上記実施例では、便宜上、レンズ群を２枚構成としたが
、３枚以上とし、焦点数、フォーカスライン数を更に増
しても良い。In the above embodiment, the lens group is composed of two lenses for convenience, but it may be three or more lenses, and the number of focal points and the number of focus lines may be further increased.
〈発明の効果〉 上記構成とすることにより次の効果がある。<Effect of the invention> The above configuration has the following effects.
■ 異軸多焦点レーザビーム集光とすることにより、Ｔ
ＩＧとレーザとの併用をすることなく予熱効果や先行溶
融池のレーザ吸収効果が高まり、別々の加熱手段は不要
となる。■ By focusing different axis multifocal laser beams, T
The preheating effect and the laser absorption effect of the preceding molten pool are enhanced without using IG and laser in combination, and separate heating means are not required.
■ 異軸多フォーカスライン式レーザビーム集光装置に
より、予熱、主溶融、再溶融（又は後熱）を１プロセス
でレーザ肉盛施工が可能である。■ Laser metal deposition can be performed in one process including preheating, main melting, and remelting (or postheating) using a different axis multi-focus line type laser beam condenser.
第１図ないし第３図は本発明の一実施例で、第１図は構
成図、第２図は第１図のイーイ矢視図、第３図は第１図
のローロ矢視図、第４図ないし第６図は他の実施例で、
第４図は構成図、第、５図は第４図のハーバ矢視図、第
６図は第４図の二−二矢視図、第７図は一実施例の溶接
状態図、第８図は他の実施例のレーザ肉盛状態図、第９
図は従来例の構成図、第１０図はレーザ吸収率と温度特
性線図である。
図 中、
６Ａ、６Ｂはレンズ、
８Ａ、８Ｂは焦点、
９Ａ、９Ｂ、９Ｃはフォーカスライン（焦点）である。
第１図
伝送ビーム４
第２図 第３囚
１ｊＡ−巳
第４図
第５図 第６図
（ハーバ矢視） （二−二
矢視）第７図
第８図1 to 3 show one embodiment of the present invention, in which FIG. 1 is a configuration diagram, FIG. 2 is a view in the direction of the arrow E in FIG. 1, and FIG. 4 to 6 are other embodiments,
4 is a configuration diagram, FIGS. 5 and 5 are views in the direction of the harbor arrow in FIG. 4, FIG. The figure is a laser welding state diagram of another embodiment, No. 9
The figure is a configuration diagram of a conventional example, and FIG. 10 is a diagram of laser absorption rate and temperature characteristics. In the figure, 6A and 6B are lenses, 8A and 8B are focal points, and 9A, 9B, and 9C are focus lines (focal points). Fig. 1 Transmission beam 4 Fig. 2 Fig. 3 Prisoner 1jA-Snake Fig. 4 Fig. 5 Fig. 6 (View from Harbor arrow) (View from arrow 2-2) Fig. 7 Fig. 8
Claims (1)
せるビーム集光装置において、 部分的に凸部で残りを平坦部としたレンズを複数個光軸
を一致させて配電したレンズ群であって、一方のレンズ
の凸部を他方のレンズの平坦部に対応させ、上記凸部の
中心どおしを異軸に形成したことを特徴とする異軸多焦
点式レーザビーム集光装置。[Scope of Claims] A beam concentrator that condenses a beam that has passed through a laser oscillator and a beam transmission system, comprising a plurality of lenses each having a convex portion and a flat portion and distributing power by aligning their optical axes with each other. A different-axis multifocal laser beam condenser, characterized in that the convex part of one lens corresponds to the flat part of the other lens, and the centers of the convex parts are formed on different axes. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62300198A JP2615093B2 (en) | 1987-11-30 | 1987-11-30 | Off-axis multifocal laser beam focusing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62300198A JP2615093B2 (en) | 1987-11-30 | 1987-11-30 | Off-axis multifocal laser beam focusing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01143784A true JPH01143784A (en) | 1989-06-06 |
| JP2615093B2 JP2615093B2 (en) | 1997-05-28 |
Family
ID=17881914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62300198A Expired - Fee Related JP2615093B2 (en) | 1987-11-30 | 1987-11-30 | Off-axis multifocal laser beam focusing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2615093B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04344882A (en) * | 1991-05-22 | 1992-12-01 | Matsushita Electric Works Ltd | Method for cutting with laser beam |
| US5728993A (en) * | 1995-08-05 | 1998-03-17 | The Boc Group Plc | Laser cutting of materials with plural beams |
| US5841097A (en) * | 1995-12-27 | 1998-11-24 | Toyota Jidosha Kabushiki Kaisha | Process and apparatus for welding workpieces with two or more laser beams whose spots are oscillated across welding direction |
| JP2000301376A (en) * | 1999-04-05 | 2000-10-31 | General Electric Co <Ge> | Heat treatment of weld bead |
| JP2001179473A (en) * | 1999-12-24 | 2001-07-03 | Semiconductor Energy Lab Co Ltd | Laser beam device, method of cutting substrate by using laser beam, and method of manufacturing semiconductor device |
| US6489588B1 (en) | 1999-11-24 | 2002-12-03 | Applied Photonics, Inc. | Method and apparatus for separating non-metallic materials |
| EP2186594A1 (en) * | 2008-11-12 | 2010-05-19 | Siemens Aktiengesellschaft | Method of and device for pre-heating during welding using a second laser beam |
| CN106695113A (en) * | 2016-12-08 | 2017-05-24 | 华中科技大学 | Axial bifocus lens |
| JP2018171623A (en) * | 2017-03-31 | 2018-11-08 | 古河電気工業株式会社 | Welding device and welding method |
-
1987
- 1987-11-30 JP JP62300198A patent/JP2615093B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04344882A (en) * | 1991-05-22 | 1992-12-01 | Matsushita Electric Works Ltd | Method for cutting with laser beam |
| US5728993A (en) * | 1995-08-05 | 1998-03-17 | The Boc Group Plc | Laser cutting of materials with plural beams |
| US5841097A (en) * | 1995-12-27 | 1998-11-24 | Toyota Jidosha Kabushiki Kaisha | Process and apparatus for welding workpieces with two or more laser beams whose spots are oscillated across welding direction |
| JP2000301376A (en) * | 1999-04-05 | 2000-10-31 | General Electric Co <Ge> | Heat treatment of weld bead |
| US6489588B1 (en) | 1999-11-24 | 2002-12-03 | Applied Photonics, Inc. | Method and apparatus for separating non-metallic materials |
| US6660963B2 (en) | 1999-11-24 | 2003-12-09 | Applied Photonics, Inc. | Method and apparatus for separating non-metallic materials |
| JP2001179473A (en) * | 1999-12-24 | 2001-07-03 | Semiconductor Energy Lab Co Ltd | Laser beam device, method of cutting substrate by using laser beam, and method of manufacturing semiconductor device |
| EP2186594A1 (en) * | 2008-11-12 | 2010-05-19 | Siemens Aktiengesellschaft | Method of and device for pre-heating during welding using a second laser beam |
| CN106695113A (en) * | 2016-12-08 | 2017-05-24 | 华中科技大学 | Axial bifocus lens |
| JP2018171623A (en) * | 2017-03-31 | 2018-11-08 | 古河電気工業株式会社 | Welding device and welding method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2615093B2 (en) | 1997-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |