JPH054189B2 - - Google Patents
Info
- Publication number
- JPH054189B2 JPH054189B2 JP58164956A JP16495683A JPH054189B2 JP H054189 B2 JPH054189 B2 JP H054189B2 JP 58164956 A JP58164956 A JP 58164956A JP 16495683 A JP16495683 A JP 16495683A JP H054189 B2 JPH054189 B2 JP H054189B2
- Authority
- JP
- Japan
- Prior art keywords
- laser beam
- workpiece
- measurement sensor
- optical system
- surface reflectance
- 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.)
- Expired - Lifetime
Links
- 238000005259 measurement Methods 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 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
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、レーザビームにより溶接などの加工
を行なう装置において、レーザビームの照射エネ
ルギを最適に制御し、加工性を向上させ、その長
期安定化を図るレーザビーム制御装置に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is an apparatus that performs processing such as welding using a laser beam, by optimally controlling the irradiation energy of the laser beam, improving processability, and stabilizing the process over a long period of time. The present invention relates to a laser beam control device that achieves this.
近時、レーザビームにより溶接、穴明け、切断
などの加工を行なう装置は増々多用される傾向に
ある。これらの装置は、いずれもレーザ発振器か
ら発射されるレーザビームをコリメータレンズお
よびアイリス、結像レンズなどの光学系により微
小な光束に収束させ、その焦点付近に被加工物を
配置して溶接などの加工を行なわしめる構成とな
つている。良好な加工を行なわしめるためには、
被加工物を正しく焦点付近に位置させること、お
よび被加工物の表面反射率の変化に対応して光学
系を適正に調整することなどが大切である。
BACKGROUND ART In recent years, devices that perform processing such as welding, drilling, and cutting using laser beams have been increasingly used. All of these devices converge a laser beam emitted from a laser oscillator into a minute beam of light using an optical system such as a collimator lens, iris, and imaging lens, and place the workpiece near the focal point to perform welding or other operations. It is configured to perform processing. In order to perform good processing,
It is important to correctly position the workpiece near the focal point and to appropriately adjust the optical system in response to changes in the surface reflectance of the workpiece.
しかし、従来の装置にあつては、部品寸法のば
らつきによる焦点ずれ、および被加工物の表面反
射率の変化に対しては構造的に全く無策であり、
ユーザ側で試し溶接、抜き取り検査を頻繁に実施
し、問題がある場合、その都度熟練調節員が必要
な焦点調節、絞り調節を行なわなければならず、
これらの調節のために費やされる時間は無視でき
ず、装置の稼働率の低下と、熟練調節員を常に確
保しておかなければならないという負担は、経済
上大きな欠点となつていた。また手動による調節
では長時間安定した品質を得ることが極めて困難
であつた。 However, conventional devices are structurally incapable of dealing with defocus caused by variations in component dimensions and changes in the surface reflectance of the workpiece.
The user must frequently conduct trial welding and sampling inspections, and if a problem is found, a skilled adjuster must make the necessary focus and aperture adjustments each time.
The time spent on these adjustments cannot be ignored, and the reduction in the operating rate of the equipment and the burden of having to always have a skilled adjuster available are major economic drawbacks. Furthermore, it is extremely difficult to obtain stable quality over a long period of time through manual adjustment.
本発明の目的は、光学系の焦点調節および絞り
調節を自動化することにより加工性を向上させ、
品質の長期安定化を実現すると共に、熟練調節員
を必要とせず、また装置の稼働率を向上し得るレ
ーザビーム制御装置を提供することにある。
The purpose of the present invention is to improve processability by automating focus adjustment and aperture adjustment of an optical system.
It is an object of the present invention to provide a laser beam control device that achieves long-term stability in quality, does not require a skilled controller, and can improve the operating rate of the device.
本発明は、レーザビームにより溶接などの加工
を行なう装置におけるレーザビームの照射エネル
ギを制御するレーザビーム制御装置において、レ
ーザビームの焦点と被加工物との位置変化を検出
するための位置計測センサと、被加工物の表面反
射率の変化を検出するための表面反射率計測セン
サとの出力信号によりコントローラを介して焦点
調節用レンズおよびアイリスなどの光学系を制御
し、被加工物へのレーザビームの照射エネルギ密
度が一定になるようにしたことを特徴とする。
The present invention relates to a laser beam control device that controls the irradiation energy of a laser beam in a device that performs processing such as welding with a laser beam, and a position measurement sensor for detecting a change in position between the focal point of the laser beam and a workpiece. , the optical system such as the focusing lens and iris is controlled via the controller by the output signal from the surface reflectance measurement sensor that detects changes in the surface reflectance of the workpiece, and the laser beam is directed to the workpiece. The irradiation energy density is made constant.
以下、本発明の一実施例を第１図および第２図
により説明する。第１図は本発明の一実施例の構
成を示す説明図である。発振器１から発射された
レーザビーム２は、コリメーシヨンレンズ系３に
より平行ビームにされた後、アイリス４と結像レ
ンズ５により収束され、被加工物６上に焦点を結
ぶ。被加工物６の上方にはその位置変化を検出す
るための位置計測センサ７が設けられている。コ
リメーシヨンレンズ系３とアイリス４との中間に
はダイクロイツクミラー８が配設され、かつその
左方にはハーフミラー９、モニタカメラ１０、表
面反射率計測センサ１１が配置されている。１２
はコリメーシヨンレンズ系３の位置調整をするた
めのDCサーボモータ、１３はアイリス４の開口
径を変化させるためのDCサーボモータである。
An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention. A laser beam 2 emitted from an oscillator 1 is made into a parallel beam by a collimation lens system 3, then converged by an iris 4 and an imaging lens 5, and focused on a workpiece 6. A position measurement sensor 7 is provided above the workpiece 6 to detect changes in its position. A dichroic mirror 8 is disposed between the collimation lens system 3 and the iris 4, and a half mirror 9, a monitor camera 10, and a surface reflectance measurement sensor 11 are disposed to the left of the dichroic mirror 8. 12
13 is a DC servo motor for adjusting the position of the collimation lens system 3, and 13 is a DC servo motor for changing the aperture diameter of the iris 4.
第２図は本発明の制御系の構成原理を示す説明
図である。位置計測センサ７および表面反射率計
測センサ１１の計測出力信号、すなわち位置のデ
ータと反射率のデータは、コントローラ１４に入
力され、予めプログラムされた処理手順にとずき
制御出力e1，e2に変換され、サーボアンプ１５，
１５を介してコリメーシヨンレンズ系駆動用の
DCサーボモータ１２とアイリス駆動用DCサーボ
モータ１３を駆動する。DCサーボモータ１２，
１３にはそれぞれフイードバツク用ポテンシヨン
メータ１６，１７が連動しており、その出力はサ
ーボアンプ１５，１５の入力側にフイードバツク
される構成となつている。 FIG. 2 is an explanatory diagram showing the configuration principle of the control system of the present invention. The measurement output signals of the position measurement sensor 7 and the surface reflectance measurement sensor 11, that is, position data and reflectance data, are input to the controller 14, and are outputted as control outputs e 1 , e 2 according to a preprogrammed processing procedure. is converted into servo amplifier 15,
15 for driving the collimation lens system.
The DC servo motor 12 and the iris drive DC servo motor 13 are driven. DC servo motor 12,
13 are linked with feedback potentiometers 16 and 17, respectively, and their outputs are fed back to the input sides of servo amplifiers 15 and 15, respectively.
このように、従来固定光学系であつたレンズお
よび絞りが自動調節されるので、被加工物へのレ
ーザビームの照射エネルギ密度を常に一定にで
き、高品質の溶接加工性を長時間維持することが
でき、装置の高稼働変化を達成できる。 In this way, the lenses and diaphragm, which were conventionally fixed optical systems, are automatically adjusted, so the energy density of the laser beam irradiated to the workpiece can always be kept constant, and high-quality welding workability can be maintained for a long time. It is possible to achieve high operating change of the equipment.
なお、上記実施例における制御系はクローズド
ループ制御系であるが、オープンループ制御系を
用いることもできる。またアイリス４を制御する
のでなく、結像レンズ５を制御する構造としても
同等の機能が得られる。 Although the control system in the above embodiment is a closed loop control system, an open loop control system may also be used. Further, the same function can be obtained by using a structure that controls the imaging lens 5 instead of controlling the iris 4.
本発明によれば、位置計測センサと表面反射率
計測センサの出力に連動し、レーザ光学系を制御
することによりレーザ加工時の加工条件を自動制
御する構成なので、溶接性等の加工性を大幅に向
上させ、長時間安定した加工品質を得ることがで
きる。また熟練調節員による調節作業を不要と
し、装置の高稼働率化を達成するなどの顕著な効
果を有する。
According to the present invention, the processing conditions during laser processing are automatically controlled by linking the outputs of the position measurement sensor and the surface reflectance measurement sensor and controlling the laser optical system, which greatly improves processability such as weldability. It is possible to obtain stable machining quality over a long period of time. Further, it has remarkable effects such as eliminating the need for adjustment work by skilled controllers and achieving high operating efficiency of the device.
第１図は本発明の一実施例の光学系の構成を示
す原理説明図、第２図は同じく制御系の構成を示
す原理説明図である。
３……コリメーシヨンレンズ系、４……アイリ
ス、５……結像レンズ、６……被加工物、７……
位置計測センサ、１１……表面反射率計測セン
サ、１２，１３……DCサーボモータ、１４……
コントローラ、１６，１７……ポテンシヨメー
タ。
FIG. 1 is a principle explanatory diagram showing the configuration of an optical system according to an embodiment of the present invention, and FIG. 2 is a principle explanatory diagram showing the configuration of a control system. 3... Collimation lens system, 4... Iris, 5... Imaging lens, 6... Workpiece, 7...
Position measurement sensor, 11... Surface reflectance measurement sensor, 12, 13... DC servo motor, 14...
Controller, 16, 17...potentiometer.
Claims (1)
装置におけるレーザビームの照射エネルギを制御
するレーザビーム制御装置において、被加工物の
位置変化を検出するための位置計測センサと、被
加工物の表面反射率の変化を検出するための表面
反射率計測センサと、コントローラと、このコン
トローラからの出力により駆動制御される光学系
とを備え、前記両センサからの出力信号により光
学系を制御し、被加工物へのレーザビームの照射
エネルギ密度が常に一定になるようにしたことを
特徴とするレーザビーム制御装置。1. In a laser beam control device that controls the irradiation energy of a laser beam in a device that performs processing such as welding with a laser beam, there is a position measurement sensor for detecting changes in the position of the workpiece, and a sensor for measuring the surface reflectance of the workpiece. It is equipped with a surface reflectance measurement sensor for detecting changes, a controller, and an optical system that is driven and controlled by the output from the controller, and the optical system is controlled by the output signals from both of the sensors, and the optical system is A laser beam control device characterized in that the irradiation energy density of the laser beam is always constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58164956A JPS6096381A (en) | 1983-09-09 | 1983-09-09 | Device for controlling laser beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58164956A JPS6096381A (en) | 1983-09-09 | 1983-09-09 | Device for controlling laser beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6096381A JPS6096381A (en) | 1985-05-29 |
| JPH054189B2 true JPH054189B2 (en) | 1993-01-19 |
Family
ID=15803055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58164956A Granted JPS6096381A (en) | 1983-09-09 | 1983-09-09 | Device for controlling laser beam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6096381A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4708698B2 (en) * | 2003-11-14 | 2011-06-22 | 株式会社タダノ | Crane boom enclosure |
| GB201211541D0 (en) * | 2012-06-29 | 2012-08-15 | Melexis Technologies Nv | Method and system for powering and measuring position of a DC-motor over a three-wire interface |
| JP6485293B2 (en) * | 2015-09-02 | 2019-03-20 | トヨタ自動車株式会社 | Laser welding machine |
-
1983
- 1983-09-09 JP JP58164956A patent/JPS6096381A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6096381A (en) | 1985-05-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102007039878A1 (en) | Device for focusing a laser beam used during the modification of workpieces comprises a lens group which is mounted so that it can be moved in the axial direction and a further lens group fixed in relation to the other lens group | |
| JPS60247831A (en) | Autofocus offset correction system | |
| US4937801A (en) | Magneto-optical recording and reproducing apparatus with magnetic field controller | |
| JPH054189B2 (en) | ||
| JP2728358B2 (en) | Method and apparatus for centering nozzle of laser beam machine | |
| JPS59163091A (en) | Laser working method | |
| US4652092A (en) | Neodymium-YAG laser, for ophthalmological treatment | |
| JPS58224088A (en) | Laser processing device | |
| JPH0381082A (en) | Method and apparatus for controlling diameter of laser beam | |
| JPH04237587A (en) | Laser beam machine | |
| US6211900B1 (en) | Recording apparatus | |
| US20210114139A1 (en) | Controller, control system, and recording medium storing program | |
| JPH1147970A (en) | Laser welding machine with automatic focusing device | |
| JPH0825070A (en) | Optical system for laser working | |
| US20030012094A1 (en) | Apparatus and method for focusing light beam and exposure apparatus | |
| JPS62158592A (en) | Laser beam machining device | |
| JPH026093A (en) | Automatic focal length adjusting device | |
| JPS62231921A (en) | Laser beam processing optical device | |
| JPH05146885A (en) | Laser beam machine | |
| JPS6393491A (en) | Condenser lens controller for laser beam processing | |
| JPS63154283A (en) | Laser beam welding equipment | |
| JPS60205835A (en) | Optical head | |
| JP4774358B2 (en) | Method and apparatus for adjusting optical pickup | |
| JPH01241390A (en) | Laser beam machine | |
| JP2024068141A (en) | Apparatus and method for performing measurements on a workpiece and machining system and method for machining a workpiece - Patents.com |