JPS6239908Y2 - - Google Patents
Info
- Publication number
- JPS6239908Y2 JPS6239908Y2 JP1982173302U JP17330282U JPS6239908Y2 JP S6239908 Y2 JPS6239908 Y2 JP S6239908Y2 JP 1982173302 U JP1982173302 U JP 1982173302U JP 17330282 U JP17330282 U JP 17330282U JP S6239908 Y2 JPS6239908 Y2 JP S6239908Y2
- Authority
- JP
- Japan
- Prior art keywords
- protective cover
- laser beam
- temperature
- transmission device
- wall
- 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
Links
Description
【考案の詳細な説明】
〔考案の技術分野〕
この考案は、レーザ光伝送装置の改良に関す
る。[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to improvement of a laser beam transmission device.
一般に、レーザ発振器によつて得られるレーザ
光は指光性のよい光であつて、集光レンズで集光
することによつて高い出力密度のものが得られる
ので、被加工物の孔明け、溶接、切断、焼入れな
ど広く各種の加工工程に利用されている。
In general, the laser light obtained by a laser oscillator has good directivity, and a high output density can be obtained by condensing the light with a condensing lens. It is widely used in various processing processes such as welding, cutting, and hardening.
即ち、従来のレーザ光伝送装置は第１図に示す
ように構成され、レーザ発振器１から発射された
レーザ光２は、保護と安全のためのパイプ状保護
カバー３を通してビーム折曲げ用全反射ミラー４
へ導かれる。そして、この全反射ミラー４によ
り、レーザ光２は90゜折り曲げられ、集光レンズ
５に導かれる。この集光レンズ５でレーザ光２は
集光され、加工ノズル６を通過して、テーブル７
上に置かれた被加工物８に照射される。尚、第２
図は保護カバー３の断面形状を示し、この場合、
四角形になつている。 That is, the conventional laser beam transmission device is constructed as shown in FIG. 4
be led to. The laser beam 2 is bent by 90 degrees by the total reflection mirror 4 and guided to the condenser lens 5. The laser beam 2 is condensed by the condenser lens 5, passes through the processing nozzle 6, and passes through the table 7.
The workpiece 8 placed above is irradiated. Furthermore, the second
The figure shows the cross-sectional shape of the protective cover 3, in this case,
It is rectangular.
上記従来の装置では、保護カバー３内の空気中
の水分と炭酸ガスがCO2レーザ光２を吸収して温
度上昇し、対流を起す。このため、保護カバー３
内でCO2レーザ光２に対する屈折率の分布がで
き、長尺の保護カバー３内に大出力CO2レーザ光
２を導いた場合、ビームパターンがゆがめられ
る。即ち、第３図ａに示すように保護カバー３の
入口では断面略円形のCO2レーザ光２は、出口で
はｂに示すようにゆがんでしまう。
In the conventional device described above, the moisture and carbon dioxide gas in the air inside the protective cover 3 absorb the CO 2 laser beam 2 and increase in temperature, causing convection. For this reason, the protective cover 3
There is a distribution of refractive index for the CO 2 laser beam 2 within the long protective cover 3, and when the high-output CO 2 laser beam 2 is guided into the long protective cover 3, the beam pattern is distorted. That is, the CO 2 laser beam 2 having a substantially circular cross section at the entrance of the protective cover 3 as shown in FIG. 3a is distorted as shown in FIG. 3b at the exit.
この考案の目的は、レーザ発振器から出力され
た大出力CO2レーザ光のビームパターンをゆがめ
ることなく、長距離にわたつて安全に導くことが
できるレーザ光伝送装置を提供することである。
The purpose of this invention is to provide a laser beam transmission device that can safely guide a high-power CO 2 laser beam output from a laser oscillator over a long distance without distorting the beam pattern.
この考案は、レーザ発振器から出たレーザ光が
全反射ミラーを介して被加工物に至る光路に、保
護カバーを設けてなるレーザ光伝送装置におい
て、
上記保護カバーは、側部又は（及び）下部が高
温壁からなり、上部又は（及び）側部が低温壁か
らなり、保護カバー内の気体に対流を起こさせる
ことを特徴としたレーザ光伝送装置である。
This invention is based on a laser beam transmission device in which a protective cover is provided on the optical path of a laser beam emitted from a laser oscillator to a workpiece via a total reflection mirror. This is a laser beam transmission device characterized in that the protective cover is made of a high-temperature wall, the upper part and/or the side part is made of a low-temperature wall, and the gas inside the protective cover causes convection.
この考案は上記従来の欠点を解消するために保
護カバーを改善したもので、保護カバーについて
のみ説明することにする。
This invention is an improvement on the protective cover in order to eliminate the above-mentioned conventional drawbacks, and only the protective cover will be explained below.
即ち、この考案のレーザ光伝送装置における保
護カバー９は第４図（断面図）に示すように構成
されている。図から明らかなように、断面形状は
例えば四角形にして、対向する高温壁ａ、低温壁
ｂ、絶縁物ｃからなつている。つまり両側壁が高
温壁ａであり、天井と底部が低温壁ｂであつて、
両者間は絶縁物ｃにより絶縁されている。この場
合、高温壁ａはいわゆる加熱壁で例えばヒーター
が埋め込まれている。又、低温壁ｂはいわゆる冷
却壁で例えば水冷パイプが埋め込まれている。更
に、絶縁物ｃは例えばプラスチツクである。 That is, the protective cover 9 in the laser beam transmission device of this invention is constructed as shown in FIG. 4 (cross-sectional view). As is clear from the figure, the cross-sectional shape is, for example, rectangular and consists of a high-temperature wall a, a low-temperature wall b, and an insulator c that face each other. In other words, both side walls are high-temperature walls a, and the ceiling and bottom are low-temperature walls b.
The two are insulated by an insulator c. In this case, the high-temperature wall a is a so-called heating wall in which, for example, a heater is embedded. The low-temperature wall b is a so-called cooling wall in which, for example, a water cooling pipe is embedded. Furthermore, the insulator c is, for example, plastic.
そして動作時には保護カバー９内の空気等の気
体は矢印で示すように高温壁ａで暖められて上昇
し、低温壁ｂに達して冷やされ、保護カバー９の
中央部を通つて下降するように対流する。この
時、保護カバー９内の中央にレーザ光２を通す
と、気体は温度上昇し上向きの気流を作ろうとす
るが、下向きの対流が支配的であるため温度分布
を形成するまでに至らず、従つて屈折率の分布を
生じない。尚、空中の水分、炭酸ガスの量、レー
ザ光に対する吸収率から考えて、下向きの流れを
支配的たらしめるには、高温壁ａと低温壁ｂの温
度差は２〜３℃で十分であり、保護カバー９内の
空気の平均的な温度は室温とほぼ同じに保つこと
ができる。 During operation, gas such as air inside the protective cover 9 is warmed by the high-temperature wall a and rises as shown by the arrow, reaches the low-temperature wall b, is cooled, and descends through the center of the protective cover 9. Convection. At this time, when the laser beam 2 is passed through the center of the protective cover 9, the temperature of the gas rises and attempts to create an upward airflow, but since downward convection is dominant, no temperature distribution is formed. Therefore, no distribution of refractive index occurs. In addition, considering the amount of moisture in the air, the amount of carbon dioxide gas, and the absorption rate for laser light, a temperature difference of 2 to 3 degrees Celsius between the high temperature wall a and the low temperature wall b is sufficient to make the downward flow dominant. , the average temperature of the air inside the protective cover 9 can be kept approximately the same as room temperature.
この考案のレーザ光伝送装置は、上記保護カバ
ー９以外は従来例（第１図）と同様構成ゆえ、詳
細な説明を省略する。 The laser beam transmission device of this invention has the same structure as the conventional example (FIG. 1) except for the protective cover 9, so a detailed explanation will be omitted.
この考案によれば、保護カバー９内には温度分
布を生じない、つまり屈折率分布を生じないた
め、ビームパターンをゆがめることなく、安全に
長距離にわたつてCO2レーザ光２を伝送すること
ができる。
According to this invention, there is no temperature distribution within the protective cover 9, that is, no refractive index distribution, so the CO 2 laser beam 2 can be safely transmitted over a long distance without distorting the beam pattern. I can do it.
即ち、この考案では、保護カバー９の壁を熱絶
縁材料を挾んで構成し、各壁を加熱又は冷却して
いるので、保護カバー９の中央に下向きの対流が
生じる。この下向きの気流がレーザ光を吸収して
温度上昇し、上向きの対流を起こそうとするが、
下向きの対流が支配的であるため温度分布を作る
までに至らず、従つて屈折率分布を生じないから
レーザ光２の伝送によつてビームパターンがゆが
められることがない。 That is, in this invention, the walls of the protective cover 9 are constructed by sandwiching heat insulating material, and each wall is heated or cooled, so that downward convection occurs in the center of the protective cover 9. This downward airflow absorbs the laser beam, increases its temperature, and tries to cause upward convection.
Since downward convection is dominant, no temperature distribution is produced, and therefore no refractive index distribution is produced, so the beam pattern is not distorted by the transmission of the laser beam 2.
尚、上記実施例では、保護カバー９の断面形状
は四角形であつたが、必ずしも四角形に限らな
い。要するに中央部に下向きの気流を生ずるよう
に高温壁と低温壁とからなる保護カバーであれば
よい。 In addition, although the cross-sectional shape of the protective cover 9 was a square in the said Example, it is not necessarily limited to a square. In short, any protective cover consisting of a high-temperature wall and a low-temperature wall will suffice as long as it generates a downward airflow in the center.
即ち、第５図及び第６図はこの考案の変形例を
示したもので、上記実施例と同様効果が得られ
る。第５図の場合は断面が円形の保護カバー１０
であり、第６図の場合は断面が六角形の保護カバ
ー１１である。 That is, FIGS. 5 and 6 show a modification of this invention, which provides the same effects as the above embodiment. In the case of Fig. 5, the protective cover 10 has a circular cross section.
In the case of FIG. 6, the protective cover 11 has a hexagonal cross section.
第１図は従来のレーザ光伝送装置を示す概略構
成図、第２図は従来の装置における保護カバーを
示す断面図、第３図ａ，ｂは従来の装置における
ビームパターンのゆがみを示す断面図、第４図は
この考案の一実施例に係るレーザ光伝送装置にお
ける保護カバーを示す断面図、第５図及び第６図
はこの考案の変形例を示す断面図である。
１……レーザ発振器、２……レーザ光、３……
保護カバー、４……全反射ミラー、５……集光レ
ンズ、６……加工ノズル、７……テーブル、８…
…被加工物、９，１０，１１……保護カバー。
Fig. 1 is a schematic configuration diagram showing a conventional laser beam transmission device, Fig. 2 is a sectional view showing a protective cover in the conventional device, and Fig. 3 a and b are sectional views showing distortion of the beam pattern in the conventional device. , FIG. 4 is a sectional view showing a protective cover in a laser beam transmission device according to an embodiment of this invention, and FIGS. 5 and 6 are sectional views showing modified examples of this invention. 1... Laser oscillator, 2... Laser light, 3...
Protective cover, 4... Total reflection mirror, 5... Condensing lens, 6... Processing nozzle, 7... Table, 8...
...Workpiece, 9, 10, 11...Protective cover.
Claims (1)
を介して被加工物に至る光路に、保護カバーを設
けてなるレーザ光伝送装置において、 上記保護カバーは、側部又は（及び）下部が高
温壁からなり、上部又は（及び）側部が低温壁か
らなり、保護カバー内の気体に対流を起こさせる
ことを特徴としたレーザ光伝送装置。[Claims for Utility Model Registration] In a laser beam transmission device in which a protective cover is provided on the optical path of a laser beam emitted from a laser oscillator to a workpiece via a total reflection mirror, the protective cover is 1. A laser beam transmission device characterized in that (and) the lower part consists of a high-temperature wall, the upper part or (and) the side part consists of a low-temperature wall, and the gas in the protective cover causes convection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982173302U JPS5977584U (en) | 1982-11-16 | 1982-11-16 | Laser light transmission equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982173302U JPS5977584U (en) | 1982-11-16 | 1982-11-16 | Laser light transmission equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5977584U JPS5977584U (en) | 1984-05-25 |
| JPS6239908Y2 true JPS6239908Y2 (en) | 1987-10-12 |
Family
ID=30377563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982173302U Granted JPS5977584U (en) | 1982-11-16 | 1982-11-16 | Laser light transmission equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5977584U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6779393B1 (en) * | 2019-05-09 | 2020-11-04 | 三菱電機株式会社 | Laser device |
-
1982
- 1982-11-16 JP JP1982173302U patent/JPS5977584U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5977584U (en) | 1984-05-25 |
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