JPH0551882B2 - - Google Patents
Info
- Publication number
- JPH0551882B2 JPH0551882B2 JP6071286A JP6071286A JPH0551882B2 JP H0551882 B2 JPH0551882 B2 JP H0551882B2 JP 6071286 A JP6071286 A JP 6071286A JP 6071286 A JP6071286 A JP 6071286A JP H0551882 B2 JPH0551882 B2 JP H0551882B2
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- laser optical
- laser
- plate
- mirror
- 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
- 230000003287 optical effect Effects 0.000 claims description 27
- 238000001514 detection method Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Mounting And Adjusting Of Optical Elements (AREA)
Description
【発明の詳細な説明】
＜産業上の利用分野＞
本発明は、レーザ加工機におけるレーザ光軸の
ずれを検出する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a device for detecting a deviation of a laser optical axis in a laser processing machine.
＜従来の技術＞
レーザ光によりワークをトリミング、穴あけ、
切断、溶接、表面処理等を行うレーザ加工機は、
レーザトーチを各種の形状のワークの加工面に直
角に向けるよう複数個所に異なつた旋回軸線で旋
回する旋回部を有し、レーザ発振器からのレーザ
光軸をレーザ光軸通路を介してレーザトーチに導
くために、各旋回部で屈折反射させるミラーが配
置されている。<Conventional technology> Workpieces are trimmed, drilled, and
Laser processing machines that perform cutting, welding, surface treatment, etc.
It has a rotating section that rotates at different rotation axes at multiple locations so that the laser torch is directed perpendicularly to the processing surface of workpieces of various shapes, and the laser optical axis from the laser oscillator is guided to the laser torch through the laser optical axis path. A mirror for refraction and reflection is arranged at each turning section.
＜発明が解決しようとする問題点＞
上記レーザ加工機においては、レーザ光の光軸
調整を最初に行うが、使用中に振動その他の原因
でミラーの角度が変化してレーザ光軸のずれが発
するおそれがある。このレーザ光軸にずれが生ず
るとワークの加工精度に悪影響を及ぼす。<Problems to be Solved by the Invention> In the above laser processing machine, the optical axis of the laser beam is first adjusted, but during use, the angle of the mirror changes due to vibration or other causes, causing the laser optical axis to shift. There is a risk of it being emitted. If this laser optical axis shifts, it will adversely affect the processing accuracy of the workpiece.
＜問題点を解決するための手段＞
本発明は、レーザ光軸にずれが発生した場合に
これを直ちに検知するようにしたものであり、そ
の構成要旨は、レーザ光軸を屈折反射するミラー
が固定された近傍のレーザ光軸通路に、レーザ光
軸が通過する穴を設けた熱伝導性の良い材質のプ
レートを固定し、このプレートの温度変化を検出
する手段を備えたものである。<Means for solving the problem> The present invention is designed to immediately detect a shift in the laser optical axis when it occurs, and the gist of the configuration is that a mirror that refracts and reflects the laser optical axis is used. A plate made of a material with good thermal conductivity and having a hole through which the laser optical axis passes is fixed in the laser optical axis path near the fixed laser beam, and means for detecting temperature changes in this plate is provided.
＜作用＞
本考案は、レーザ光軸の整線にずれが生じたと
きに、プレートが加熱して温度上昇し、この温度
変化を検知してレーザ光軸のずれを検出するもの
である。<Operation> According to the present invention, when a deviation occurs in the alignment of the laser optical axis, the plate is heated and the temperature rises, and this temperature change is detected to detect the deviation of the laser optical axis.
＜実施例＞
以下本発明の実施例を図面に基づいて説明す
る。第１図において、１はレーザ光伝送管であ
る。２はレーザトーチ、３はレーザトーチ２の旋
回部であり、前記レーザ光通路１を伝送されるレ
ーザ光軸L1をレーザトーチ２の方向のレーザ光
軸L2に屈折反射するミラー４が内設されている。
５はレーザ光軸L2の集光レンズである。<Examples> Examples of the present invention will be described below based on the drawings. In FIG. 1, 1 is a laser beam transmission tube. 2 is a laser torch, and 3 is a rotating part of the laser torch 2, which includes a mirror 4 that refracts and reflects the laser optical axis L1 transmitted through the laser light path 1 to the laser optical axis L2 in the direction of the laser torch 2. There is.
5 is a condensing lens for the laser optical axis L2 .
本発明は、前記ミラー４の近傍のレーザ光軸通
路に、レーザ光軸L1が通過する穴７を設けたプ
レート６を固定する。このプレート６は例えばア
ルミ、銅等の熱伝導性の良い材質であり、表面に
グラフアイト等の吸収剤が塗布してある。そし
て、前記プレート６の温度変化を検出する手段が
設けられている。この温度変化を検出する手段
は、第１図及び第２図で示すように、プレート６
の外径部の一部に形状記憶合金８を固設し、この
形状記憶合金８の先端に対向し、近接スイツチ９
をブラケツト１０により旋回部３に定点固定した
構成である。尚、前記近接スイツチ９を差動トラ
ンスに置換してもよいし、形状記憶合金８を温度
センサに置換してもよい。温度センサを用いた場
合には近接スイツチ９や差動トランスは不要とな
る。また、プレート６はミラー４への入光側に配
置されることが望ましく、図例のようにレーザト
ーチ２の旋回部のみならず、レーザ光伝送管の各
旋回部に設けたミラーの近傍に配置してもよい。 In the present invention, a plate 6 provided with a hole 7 through which the laser optical axis L1 passes is fixed in the laser optical axis path near the mirror 4. The plate 6 is made of a material with good thermal conductivity, such as aluminum or copper, and its surface is coated with an absorbent such as graphite. Means for detecting temperature changes in the plate 6 is provided. The means for detecting this temperature change is as shown in FIGS.
A shape memory alloy 8 is fixed to a part of the outer diameter of the shape memory alloy 8, and a proximity switch 9
is fixed at a fixed point to the rotating section 3 by a bracket 10. Note that the proximity switch 9 may be replaced with a differential transformer, and the shape memory alloy 8 may be replaced with a temperature sensor. When a temperature sensor is used, the proximity switch 9 and differential transformer are not required. In addition, it is desirable that the plate 6 be placed on the side where the light enters the mirror 4, and it is placed not only at the turning section of the laser torch 2 as shown in the figure, but also near the mirrors provided at each turning section of the laser beam transmission tube. You may.
本発明は上記の通りの構成であるから、ミラー
４に入光されるレーザ光軸L1が正規の整線の場
合は、プレート６に明けられている穴７の中心を
通過するため、レーザ光はプレート６には当ら
ず、プレート６は温度上昇をしない。しかし、レ
ーザ光軸L1が正規の整線よりずれた場合には、
レーザ光軸L1はプレート６の穴７の中心より偏
位してレーザ光がプレート６に当り、プレート６
は温度上昇する。このプレート６の温度上昇によ
り形状記憶合金８が形状状変化し、この変化量を
近接スイツチ９又は差動トランスにて検出するの
である。尚、目視によつて形状記憶合金８の変化
量を検知することも可能である。 Since the present invention has the above configuration, when the laser optical axis L 1 entering the mirror 4 is in a regular alignment, the laser beam passes through the center of the hole 7 made in the plate 6. The light does not hit the plate 6 and the plate 6 does not increase in temperature. However, if the laser optical axis L1 deviates from the normal alignment,
The laser optical axis L1 is deviated from the center of the hole 7 of the plate 6, and the laser beam hits the plate 6, and the plate 6
temperature rises. This rise in temperature of the plate 6 causes the shape memory alloy 8 to change its shape, and the amount of this change is detected by the proximity switch 9 or the differential transformer. Note that it is also possible to visually detect the amount of change in the shape memory alloy 8.
＜発明の効果＞
以上のように本発明によると、レーザ光軸のず
れを簡単な構造の温度変化検知手段によつて確実
に検出することができ、レーザ光軸のずれによる
ワークの加工トラブル等を未然に防止する利点を
有している。<Effects of the Invention> As described above, according to the present invention, misalignment of the laser optical axis can be reliably detected by a temperature change detection means with a simple structure, and troubles in processing workpieces due to misalignment of the laser optical axis can be avoided. This has the advantage of preventing this from occurring.
図面は本発明の一実施例を示すものであり、第
１図は要部断面図、第２図は第１図−線断面
図である。
１…レーザ光伝送管、２…レーザトーチ、３…
旋回部、４…ミラー、６…プレート、７…穴、８
…形状記憶合金、９…近接スイツチ。
The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view of a main part, and FIG. 2 is a sectional view taken along the line taken along the line of FIG. 1. 1...Laser beam transmission tube, 2...Laser torch, 3...
Swivel part, 4... Mirror, 6... Plate, 7... Hole, 8
...shape memory alloy, 9...proximity switch.
Claims (1)
た近傍のレーザ光軸通路に、レーザ光軸が通過す
る穴を設けた熱伝導性の良い材質のプレートを固
定し、このプレートの温度変化を検出する手段を
備えたことを特徴とするレーザ光軸ずれ検出装
置。1. A plate made of a thermally conductive material with a hole through which the laser optical axis passes is fixed in the laser optical axis path near where a mirror that refracts and reflects the laser optical axis is fixed, and temperature changes in this plate are detected. What is claimed is: 1. A laser optical axis deviation detection device characterized by comprising means for detecting a deviation of a laser optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6071286A JPS62218912A (en) | 1986-03-20 | 1986-03-20 | Device for detecting drift of laser beam axis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6071286A JPS62218912A (en) | 1986-03-20 | 1986-03-20 | Device for detecting drift of laser beam axis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62218912A JPS62218912A (en) | 1987-09-26 |
| JPH0551882B2 true JPH0551882B2 (en) | 1993-08-03 |
Family
ID=13150173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6071286A Granted JPS62218912A (en) | 1986-03-20 | 1986-03-20 | Device for detecting drift of laser beam axis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62218912A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5160917A (en) * | 1990-06-14 | 1992-11-03 | Iowa State University Research Foundation, Inc. | Energy beam position detector |
| DE102011005775B4 (en) | 2011-03-18 | 2012-11-15 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Detector and method for detecting alignment of a laser beam in a laser processing machine and laser processing machine |
-
1986
- 1986-03-20 JP JP6071286A patent/JPS62218912A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62218912A (en) | 1987-09-26 |
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