JPS626789A - Laser beam welding machine - Google Patents
Laser beam welding machineInfo
- Publication number
- JPS626789A JPS626789A JP60146399A JP14639985A JPS626789A JP S626789 A JPS626789 A JP S626789A JP 60146399 A JP60146399 A JP 60146399A JP 14639985 A JP14639985 A JP 14639985A JP S626789 A JPS626789 A JP S626789A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- ray
- reflected
- laser
- welding point
- 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
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
- B23K26/03—Observing, e.g. monitoring, the workpiece
-
- 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
- B23K26/22—Spot welding
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、レーザ溶接機に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a laser welding machine.
［従来の技術］ 第３図は、従来のレーザ溶接機の一例を示す図である。[Conventional technology] FIG. 3 is a diagram showing an example of a conventional laser welding machine.
レーザ照射手段１０からのレーザ１１が被溶接部材３０
の溶接点３１に照射され、この溶接点３１において加熱
溶接される。The laser 11 from the laser irradiation means 10 is applied to the workpiece 30 to be welded.
The welding point 31 is irradiated, and heat welding is performed at this welding point 31.
一方、溶接点３１およびその周辺からの光が、結像レン
ズ２１を通過し、ミラー２０で反射して撮像素子４０の
撮像面で結像される。なお、ミラー２０には透孔２０ａ
が設けられている。On the other hand, light from the welding point 31 and its surroundings passes through the imaging lens 21, is reflected by the mirror 20, and is imaged on the imaging surface of the imaging element 40. Note that the mirror 20 has a through hole 20a.
is provided.
したがって、第４図に示すように、撮像素子４０で結像
した画像が、ＣＲＴ等の画面４１に表示される。このた
めに、被溶接部材３０および溶接点３１の溶接状態を、
作業員が容易に視認することができる。Therefore, as shown in FIG. 4, an image formed by the image sensor 40 is displayed on a screen 41 such as a CRT. For this purpose, the welding state of the member to be welded 30 and the welding point 31 is
It can be easily seen by workers.
［従来技術の問題点］
上記従来例においては、溶接状態の検査は行なわれてい
ないか、もし行なわれていたとしても、作業員の目視に
よる検査である。[Problems with the Prior Art] In the above-mentioned conventional examples, the welding condition is not inspected, or even if it is, it is inspected visually by the operator.
したがって、その溶接が確実になされたか否かの検査は
、実際には行なわれていないので、信頼性の高い製品を
期待することができない。Therefore, since no inspection is actually performed to determine whether or not the welding has been performed reliably, highly reliable products cannot be expected.
もっとも、溶接の異常を確実に検査することはできるが
、その場合、溶接の後に、検査工程を設けなければなら
ないので、全体の製造工程が複雑になるという問題があ
る。Although it is possible to reliably inspect welding for abnormalities, in that case, an inspection step must be performed after welding, which poses a problem in that the entire manufacturing process becomes complicated.
［発明の目的］
本発明は、上記従来技術の問題点に着目してなされたも
のであり、溶接の良否を容易に判別することができると
ともに、その溶接良否の判別を、溶接と同時に行なうこ
とができるレーザ溶接機を提供することを目的とするも
のである。[Object of the Invention] The present invention has been made by focusing on the above-mentioned problems of the prior art, and provides that it is possible to easily determine whether welding is good or bad, and the determination of whether welding is good or bad is performed at the same time as welding. The purpose of this invention is to provide a laser welding machine that can perform the following steps.
［発明の実施例］ 第１図は、本発明の一実施例を示す説明図である。[Embodiments of the invention] FIG. 1 is an explanatory diagram showing one embodiment of the present invention.
レーザ照射手段１０は、溶接点３１に炭酸ガズレーザ１
１を照射するものである。The laser irradiation means 10 applies a carbon dioxide gas laser 1 to the welding point 31.
1.
−次ミラー５０は、第３図に示す全反射ミラー２０と同
様のものであり、その中央部分に透孔５０ａを有する。The -order mirror 50 is similar to the total reflection mirror 20 shown in FIG. 3, and has a through hole 50a in its center.
この透孔５０ａは、レーザ１工が溶接点３１に向う通路
に設けられたものである。This through hole 50a is provided in the path through which the laser beam goes toward the welding point 31.
なお、−次ミラー５０は、レーザ照射手段１０から溶接
点３１までの光路中に設けられ、溶接点３１から受けた
光を反射するミラーである。Note that the -order mirror 50 is a mirror that is provided in the optical path from the laser irradiation means 10 to the welding point 31 and reflects the light received from the welding point 31.
ダイクロイックミラー６０は、−次ミラー５０と撮像素
子４０との間に設けられ、赤外線のみを反射し、可視光
を通過するミラーである。The dichroic mirror 60 is provided between the -order mirror 50 and the image sensor 40, and is a mirror that reflects only infrared rays and passes visible light.
光ファイバ６１は、ダイクロイックミラー６０で反射さ
れた赤外線を通過させるものであり、その端面６１ａは
、結像レンズ２１によって集光された溶接点３１の像を
結像させる位置に設けられている。The optical fiber 61 allows infrared rays reflected by the dichroic mirror 60 to pass therethrough, and its end face 61a is provided at a position where an image of the welding point 31 focused by the imaging lens 21 is formed.
赤外線センサ７０は、ダイクロイックミラー６０で反射
した赤外線のうち、レーザ１１の波長域以外の波長域を
有する赤外線に基づいて溶接点３１の温度を測定するセ
ンサである。The infrared sensor 70 is a sensor that measures the temperature of the welding point 31 based on infrared rays having a wavelength range other than the wavelength range of the laser 11 among the infrared rays reflected by the dichroic mirror 60.
判別手段８０は、赤外線センサ７０からの出力信号が所
定値以上である場合に、溶接点３１における溶接が良好
に行なわれたことを示す良好信号を出力するものであり
、赤外線センサ７０からの出力信号が所定値より少ない
場合には、溶接不良信号を発生するものである。The determining means 80 outputs a good signal indicating that welding at the welding point 31 has been successfully performed when the output signal from the infrared sensor 70 is equal to or higher than a predetermined value. If the signal is less than a predetermined value, a welding defect signal is generated.
次に、Ｌ記実施例の動作について説明する。Next, the operation of the embodiment L will be explained.
レーザ照射手段ｉｏからレーザ１１が照射され、溶接点
３１において加熱溶接される。The laser 11 is irradiated from the laser irradiation means io, and heat welding is performed at the welding point 31.
この場合に、溶接点３１およびその周辺において、可視
光が反射し赤外線が発生し、これらの光を結像レンズ２
１が集光する。そして、集光された光は、−次ミラー５
０によって全反射され、その反射された光のうち、可視
光はダイクロイックミラー６０を通過して撮像素子４０
の撮像面で結像する。これによって、第４図に示す従来
例と同様に、ＣＲＴ等の画面４１上に、溶接点３１およ
びその周辺が表示される。この表示内容に基づいて１作
業者は、レーザ溶接に関する位置合わせ等の操作を、容
易に行なうことができる。In this case, visible light is reflected at and around the welding point 31 and infrared rays are generated, and these lights are passed through the imaging lens 2.
1 is focused. Then, the condensed light is transmitted to the −order mirror 5
Of the reflected light, the visible light passes through the dichroic mirror 60 and reaches the image sensor 40.
The image is formed on the imaging plane. As a result, the welding point 31 and its surroundings are displayed on the screen 41 of a CRT or the like, similar to the conventional example shown in FIG. Based on this display content, one worker can easily perform operations such as positioning regarding laser welding.
一方、溶接点３１で反射された反射光のうち、赤外線は
ダイクロイックミラー６０で反射され、光ファイバ６１
の端面６１ａで結像する。この結像された光は、光ファ
イバ６１を通過して、赤外線センサ７０に送られる。赤
外線センサ７０は。On the other hand, among the reflected light reflected at the welding point 31, the infrared rays are reflected by the dichroic mirror 60 and
An image is formed on the end surface 61a of the. This imaged light passes through the optical fiber 61 and is sent to the infrared sensor 70. The infrared sensor 70 is.
受けた赤外線のうち、レーザ１１の波長域以外の波長域
の赤外線に基づいて、レーザ溶接時の表面温度を検出し
、その表面温度に応じた信号が出力される。そして、赤
外線センサ７０の出力信号に基づいて、表面温度が所定
値以上の場合に限って、判別手段８０が溶接良好信号を
出力する。これによって、溶接が良好の場合には、たと
えば、所定のランプが点灯する。Among the received infrared rays, the surface temperature during laser welding is detected based on the infrared rays in a wavelength range other than the wavelength range of the laser 11, and a signal corresponding to the surface temperature is output. Then, based on the output signal of the infrared sensor 70, the determining means 80 outputs a welding good signal only when the surface temperature is equal to or higher than a predetermined value. As a result, if the welding is good, for example, a predetermined lamp is lit.
このように、レーザ照射による溶接と同時に、その溶接
点３１における溶接の状態を、作業者が容易に把握する
ことができる。In this way, the operator can easily grasp the welding state at the welding point 31 at the same time as welding by laser irradiation.
上記実施例においては、光ファイバ６１を使用し、これ
によって、赤外線センサ７０の設置位置を自由に選択す
ることができる。しかし、光ファイバ６１を省略するよ
うにしてもよい。この場合、赤外線センサ７０の受光面
を、光フアイバ６エの端面６１ａと同じ位置に設置する
必要がある。In the embodiment described above, the optical fiber 61 is used, so that the installation position of the infrared sensor 70 can be freely selected. However, the optical fiber 61 may be omitted. In this case, the light receiving surface of the infrared sensor 70 needs to be installed at the same position as the end surface 61a of the optical fiber 6e.
また、ダイクロイックミラー６０は、赤外線のみを赤外
線センサ７０に送るという作用の他に、撮像素子４０の
撮像面に赤外線を送らないことによって、撮像面におけ
る焼き付きを防止するという作用がある。In addition to the function of sending only infrared rays to the infrared sensor 70, the dichroic mirror 60 also has the function of preventing burn-in on the imaging surface by not sending infrared rays to the imaging surface of the image sensor 40.
さらに、−次ミラー５０の中央部における透孔５０ａを
設ける必要はない、ただし、この場合、遠赤外波長の赤
外線によって透孔ができる。そして、−次ミラー５０を
全反射ミラーでなくハーフミラ−とするようにしてもよ
い。Furthermore, it is not necessary to provide the through hole 50a in the center of the -order mirror 50, however, in this case, the through hole is formed by infrared rays of far infrared wavelengths. Further, the -order mirror 50 may be a half mirror instead of a total reflection mirror.
また、被溶接部材３０としては、ワイヤ同志の組合せ、
ワイヤと端子との組合せの他に、スポット溶接が可能な
ものであれば、何を採用してもよい。Further, as the member to be welded 30, a combination of wires,
In addition to the combination of wires and terminals, any combination that can be spot welded may be used.
第２図は、本発明の他の実施例を示す図である。なお、
第１図に示す実施例に使用されている部材と同じ部材に
ついては、同一の符号を付してその説明を省略する。FIG. 2 is a diagram showing another embodiment of the present invention. In addition,
The same members as those used in the embodiment shown in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted.
この実施例は、レーザ照射手段１０ａがヤグレーザｌｌ
ａを発生するものである。In this embodiment, the laser irradiation means 10a is a YAG laser II.
It generates a.
グイクロックミラー９０は、ヤグレーザを通過させるが
、赤外線センサ７０で検出する赤外線を反射するもので
あり、ダイクロイー２クミラー６０は、ヤグレーザを反
射させるが、可視光を通過させるものである。The dichroic mirror 90 allows the YAG laser to pass through but reflects the infrared rays detected by the infrared sensor 70, and the dichroic mirror 60 reflects the YAG laser but allows visible light to pass through.
レーザｌｌａは、ダイクロイックミラー９０を通過し、
ダイクロイックミラー６０で反射し、加工レンズ２２を
介して、溶接点３１に集光する。The laser lla passes through a dichroic mirror 90,
The light is reflected by the dichroic mirror 60 and focused on the welding point 31 via the processing lens 22.
これによって、溶接点３１において溶接が行なわれる。As a result, welding is performed at the welding point 31.
この場合、溶接点３１からの光のうち、赤外線のみが、
ダイクロツクミラー６０で反射し、その後、ダイクロイ
ックミラー９０で反射した赤外線が、レンズ２４を介し
て、赤外線センサ７０で結像する。In this case, of the light from the welding point 31, only the infrared rays
The infrared rays reflected by the dichroic mirror 60 and then reflected by the dichroic mirror 90 are imaged by the infrared sensor 70 via the lens 24.
一方、溶接点３１からの光のうち、赤外線以外の光は、
ダイクロイックミラー６０を通過し、レンズ２３を介し
て、撮像素子４０に結像する。On the other hand, among the light from the welding point 31, light other than infrared light is
The light passes through the dichroic mirror 60 and is imaged on the image sensor 40 via the lens 23.
第２図の実施例における撮像素子４０．赤外線センサ７
０の動作は、第１図の場合と同様である。Image sensor 40 in the embodiment of FIG. Infrared sensor 7
The operation of 0 is the same as in FIG.
また、第２図の実施例の点３１に、図示しない光ファイ
バの一方の端面を配置し、この光ファイバを介して上記
ヤグレーザ、温度測定用の赤外線および撮像用の光を導
いてもよい、この場合、上記光ファイバの他方の端面側
に、その光ファイバから出射した光を平行光にするレン
ズと、その平行光を集光する集光レンズとを設ける。Alternatively, one end face of an optical fiber (not shown) may be placed at point 31 in the embodiment of FIG. 2, and the YAG laser, infrared rays for temperature measurement, and light for imaging may be guided through this optical fiber. In this case, a lens that converts the light emitted from the optical fiber into parallel light, and a condenser lens that collects the parallel light are provided on the other end surface side of the optical fiber.
このようにすると、加工点を自由に移動することができ
る。なお、上記光ファイバを使用する場合、加工レンズ
２２は集光レンズとなる。In this way, the processing point can be moved freely. In addition, when using the above-mentioned optical fiber, the processed lens 22 becomes a condensing lens.
［発明の効果］
本発明によれば、溶接の良否を容易に判別することがで
きるとともに、その溶接良否の判別を、溶接と同時に行
なうことができるという効果を有する。[Effects of the Invention] According to the present invention, it is possible to easily determine the quality of welding, and the determination of the quality of welding can be performed simultaneously with welding.
第１図は、本発明の一実施例を示す説明図である。
第２図は、本発明の他の実施例を示す図である。
ｍ３図は、従来のレーザ溶接機を示す説明図である。
第４図は、上記従来例におけるＣＲＴ等の画面を示す図
である。
１０．１０ａ・・・レーザ照射手段、
３１・・・溶接点、
４０・・・撮像素子、
５０・・・−次ミラー、
６０・・・ダイクロイックミラー、
６１・・・光ファイバ、
７０・・・赤外線センサ、
８０・・・判別手段。
第２図FIG. 1 is an explanatory diagram showing one embodiment of the present invention. FIG. 2 is a diagram showing another embodiment of the present invention. Figure m3 is an explanatory diagram showing a conventional laser welding machine. FIG. 4 is a diagram showing a screen of a CRT or the like in the conventional example. 10.10a... Laser irradiation means, 31... Welding point, 40... Image pickup element, 50... -order mirror, 60... Dichroic mirror, 61... Optical fiber, 70... Infrared sensor, 80...discrimination means. Figure 2
Claims (2)
クロイックミラーと； 前記溶接点からの光のうち、前記ダイクロイックミラー
を通過した光を受ける撮像手段と；前記ダイクロイック
ミラーで反射した赤外線であって、前記レーザの波長域
以外の波長域を有する赤外線に基づいて、前記溶接点の
温度を測定する赤外線センサと； を有することを特徴とするレーザ溶接機。(1) Laser irradiation means for irradiating laser to the welding point; A dichroic mirror that reflects only infrared rays of the light from the welding point; A dichroic mirror that reflects only the infrared rays of the light from the welding point; and an infrared sensor that measures the temperature of the welding point based on the infrared rays reflected by the dichroic mirror and having a wavelength range other than the wavelength range of the laser. laser welding machine.
、光ファイバが設けられていることを特徴とするレーザ
溶接機。(2) The laser welding machine according to claim 1, wherein an optical fiber is provided between the dichroic mirror and the infrared sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60146399A JPS626789A (en) | 1985-07-03 | 1985-07-03 | Laser beam welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60146399A JPS626789A (en) | 1985-07-03 | 1985-07-03 | Laser beam welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS626789A true JPS626789A (en) | 1987-01-13 |
| JPH0249194B2 JPH0249194B2 (en) | 1990-10-29 |
Family
ID=15406822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60146399A Granted JPS626789A (en) | 1985-07-03 | 1985-07-03 | Laser beam welding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS626789A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63175024A (en) * | 1987-01-14 | 1988-07-19 | Kanegafuchi Chem Ind Co Ltd | Novel polyimide copolymer and production thereof |
| JPH01145554A (en) * | 1987-12-02 | 1989-06-07 | Tokyo Electron Ltd | Heat treatment apparatus by laser |
| JPH01170591A (en) * | 1987-11-25 | 1989-07-05 | Robert Bosch Gmbh | Work processing apparatus |
| JPH05154675A (en) * | 1991-11-29 | 1993-06-22 | Fanuc Ltd | Laser beam machine |
| JPH09506672A (en) * | 1993-12-15 | 1997-06-30 | レール・リキード・ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | Use of an apparatus for producing excited or labile gas species for depositing films containing silicon on a metal substrate |
| US5729568A (en) * | 1993-01-22 | 1998-03-17 | Deutsche Forschungsanstalt Fuer Luft-Und Raumfahrt E.V. | Power-controlled, fractal laser system |
| US6121826A (en) * | 1997-12-19 | 2000-09-19 | Matsushita Electric Industrial Co., Ltd. | Comb filter and method for controlling the same |
| US6501043B1 (en) * | 1999-10-22 | 2002-12-31 | Medtronic, Inc. | Apparatus and method for laser welding of ribbons |
| WO2004056524A1 (en) * | 2002-12-20 | 2004-07-08 | Koninklijke Philips Electronics N.V. | A method and a device for laser spot welding |
| JP2008229672A (en) * | 2007-03-20 | 2008-10-02 | Tokyu Car Corp | Laser welding method |
| US7651264B2 (en) | 2002-06-18 | 2010-01-26 | Hamamatsu Photonics K.K. | Laser processing device, laser processing temperature measuring device, laser processing method and laser processing temperature measuring method |
| EP3135425A1 (en) * | 2015-08-27 | 2017-03-01 | Oxford Performance Materials, Inc. | Methods and apparatus for rapidly manufacturing three-dimensional objects from a plurality of layers |
| CN108311767A (en) * | 2017-12-18 | 2018-07-24 | 武汉凌云光电科技有限责任公司 | A kind of method and system of the laser welding security control based on infrared measurement of temperature variable emissivity |
| CN108393585A (en) * | 2018-04-17 | 2018-08-14 | 淮阴师范学院 | Interval adjustable multi-beam laser mash welder and end cover of filter flexible automation laser spot welding production line |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH054422U (en) * | 1991-05-28 | 1993-01-22 | 三菱電機株式会社 | Noise absorber |
| JPH0511581U (en) * | 1991-07-19 | 1993-02-12 | 九州日立マクセル株式会社 | Noise filter |
-
1985
- 1985-07-03 JP JP60146399A patent/JPS626789A/en active Granted
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63175024A (en) * | 1987-01-14 | 1988-07-19 | Kanegafuchi Chem Ind Co Ltd | Novel polyimide copolymer and production thereof |
| JPH01170591A (en) * | 1987-11-25 | 1989-07-05 | Robert Bosch Gmbh | Work processing apparatus |
| JPH01145554A (en) * | 1987-12-02 | 1989-06-07 | Tokyo Electron Ltd | Heat treatment apparatus by laser |
| JPH05154675A (en) * | 1991-11-29 | 1993-06-22 | Fanuc Ltd | Laser beam machine |
| US5729568A (en) * | 1993-01-22 | 1998-03-17 | Deutsche Forschungsanstalt Fuer Luft-Und Raumfahrt E.V. | Power-controlled, fractal laser system |
| JPH09506672A (en) * | 1993-12-15 | 1997-06-30 | レール・リキード・ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | Use of an apparatus for producing excited or labile gas species for depositing films containing silicon on a metal substrate |
| US6121826A (en) * | 1997-12-19 | 2000-09-19 | Matsushita Electric Industrial Co., Ltd. | Comb filter and method for controlling the same |
| US6501043B1 (en) * | 1999-10-22 | 2002-12-31 | Medtronic, Inc. | Apparatus and method for laser welding of ribbons |
| US7651264B2 (en) | 2002-06-18 | 2010-01-26 | Hamamatsu Photonics K.K. | Laser processing device, laser processing temperature measuring device, laser processing method and laser processing temperature measuring method |
| US8727610B2 (en) | 2002-06-18 | 2014-05-20 | Hamamatsu Photonics K.K. | Laser processing apparatus,laser processing temperature measuring apparatus,laser processing method,and laser processing temperature measuring method |
| WO2004056524A1 (en) * | 2002-12-20 | 2004-07-08 | Koninklijke Philips Electronics N.V. | A method and a device for laser spot welding |
| JP2008229672A (en) * | 2007-03-20 | 2008-10-02 | Tokyu Car Corp | Laser welding method |
| EP3135425A1 (en) * | 2015-08-27 | 2017-03-01 | Oxford Performance Materials, Inc. | Methods and apparatus for rapidly manufacturing three-dimensional objects from a plurality of layers |
| CN108311767A (en) * | 2017-12-18 | 2018-07-24 | 武汉凌云光电科技有限责任公司 | A kind of method and system of the laser welding security control based on infrared measurement of temperature variable emissivity |
| CN108311767B (en) * | 2017-12-18 | 2020-08-14 | 武汉凌云光电科技有限责任公司 | Laser welding safety control method and system based on infrared temperature measurement variable emissivity |
| CN108393585A (en) * | 2018-04-17 | 2018-08-14 | 淮阴师范学院 | Interval adjustable multi-beam laser mash welder and end cover of filter flexible automation laser spot welding production line |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0249194B2 (en) | 1990-10-29 |
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Legal Events
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| LAPS | Cancellation because of no payment of annual fees |