JPS6258835B2 - - Google Patents
Info
- Publication number
- JPS6258835B2 JPS6258835B2 JP58149938A JP14993883A JPS6258835B2 JP S6258835 B2 JPS6258835 B2 JP S6258835B2 JP 58149938 A JP58149938 A JP 58149938A JP 14993883 A JP14993883 A JP 14993883A JP S6258835 B2 JPS6258835 B2 JP S6258835B2
- Authority
- JP
- Japan
- Prior art keywords
- processing gas
- nozzle
- laser
- processing head
- processing
- 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
- 238000009931 pascalization Methods 0.000 claims description 10
- 239000007789 gas Substances 0.000 description 43
- KEUKAQNPUBYCIC-UHFFFAOYSA-N ethaneperoxoic acid;hydrogen peroxide Chemical compound OO.CC(=O)OO KEUKAQNPUBYCIC-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 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
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
-
- 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
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/1462—Nozzles; Features related to nozzles
- B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire
- B23K26/1476—Features inside the nozzle for feeding the fluid stream through the nozzle
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は、レーザ加工性能を向上させる様に
したレーザ加工ヘツドに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a laser processing head that improves laser processing performance.
従来この種のレーザ加工ヘツドとしては、第１
図に示すものがあつた。第１図は従来のレーザ加
工ヘツドを示す縦断面図である。図において、１
は加工ヘツド、２はレーザ光、３はレンズ、４は
加工ヘツド１の先端部のノズル、５は加工ガスジ
エツト、６は被加工物、７は加工ガス、８は加工
ガスボンベ、９は加工ガス７のレギユレータ、１
０は加工ガス７の電磁弁、１１は被加工物６の飛
散物であるスパツタ、１２は被加工物６の溶融物
であるドロスを示している。
Conventionally, as this type of laser processing head, the first
I got what is shown in the figure. FIG. 1 is a longitudinal sectional view showing a conventional laser processing head. In the figure, 1
2 is a processing head, 2 is a laser beam, 3 is a lens, 4 is a nozzle at the tip of the processing head 1, 5 is a processing gas jet, 6 is a workpiece, 7 is a processing gas, 8 is a processing gas cylinder, 9 is a processing gas 7 regulator, 1
0 is a solenoid valve for the processing gas 7, 11 is spatter that is a scattering of the workpiece 6, and 12 is dross that is a melt of the workpiece 6.
上記した様な構成を有する従来のレーザ加工ヘ
ツドでは、例えば酸素、窒素、空気等の加工ガス
７が、加工ガスボンベ８よりレギユレータ９及び
電磁弁１０を介し、第１図の矢印方向から加工ヘ
ツド１の内部へ供給される。この加工ガス７は、
レーザ光２と共に同軸方向に加工ヘツド１の先端
部のノズル４より、加工ガスジエツト５となつて
被加工物６上に噴射される。この時、レンズ３に
は、第２図に矢印で示す様な下方向よりの加工ガ
ス７による圧力が加えられるが、レンズ３に加わ
る圧力が、約５〜10Kg／cm2以上の強い圧力となる
と、レンズ３は、第２図の点線に示す様に変形し
てレンズ３の焦点位置がずれ、良好なレーザ加工
ができなくなつたり、また、ついにはレンズ３が
破損したりするなどの欠点があつた。 In the conventional laser processing head having the above-described configuration, a processing gas 7 such as oxygen, nitrogen, or air is supplied from a processing gas cylinder 8 to the processing head 1 from the direction of the arrow in FIG. 1 via a regulator 9 and a solenoid valve 10. is supplied to the inside of the This processing gas 7 is
A machining gas jet 5 is injected onto a workpiece 6 from a nozzle 4 at the tip of the machining head 1 coaxially with the laser beam 2 . At this time, pressure is applied to the lens 3 by the processing gas 7 from below as shown by the arrow in FIG . In this case, the lens 3 deforms as shown by the dotted line in Figure 2, causing the focal position of the lens 3 to shift, making it impossible to perform good laser processing, and eventually causing damage to the lens 3. It was hot.
この発明は、上記の様な従来のものの欠点を改
善する目的でなされたもので、レーザ光をレンズ
により集光し、加工ガスを前記レーザ光と共に同
軸的に噴射するノズルを有するレーザ加工ヘツド
において、前記ノズルを内側ノズルと外側ノズル
の２重構造に形成し、前記内側ノズルからは低圧
力の加工ガスを前記レーザ光と共に同軸的に噴射
し、前記外側ノズルからは高圧力の加工ガスを噴
射する様にして成る構成を有し、レンズの変形や
破損を防止し、常に安定した高性能なレーザ加工
を行うことができるレーザ加工ヘツドを提供する
ものである。
This invention was made with the aim of improving the drawbacks of the conventional ones as described above, and is directed to a laser processing head having a nozzle that focuses laser light with a lens and injects processing gas coaxially with the laser light. , the nozzle is formed into a double structure of an inner nozzle and an outer nozzle, the inner nozzle injects a low-pressure processing gas coaxially with the laser beam, and the outer nozzle injects a high-pressure processing gas. The object of the present invention is to provide a laser processing head that has a structure in which the lens is prevented from being deformed or damaged, and can perform stable and high-performance laser processing at all times.
以下、この発明の実施例を図について説明す
る。第３図はこの発明の一実施例であるレーザ加
工ヘツドを示す縦断面図で、第１図と同一部分は
同一符号を用いて表示してあり、その詳細な説明
は省略する。図において、４ａは加工ヘツド１の
先端部の内側ノズル、４ｂは加工ヘツド１の先端
部の外側ノズルであり、各内側ノズル４ａと外側
ノズル４ｂとは２重構造に形成される。７ａは低
圧力の加工ガス、７ｂは高圧力の加工ガス、８
ａ，９ａ，１０ａはそれぞれ低圧力の加工ガス７
ａ側の加工ガスボンベ、レギユレータ、電磁弁で
ある。また、８ｂ，９ｂ，１０ｂはそれぞれ高圧
力の加工ガス７ｂ側の加工ガスボンベ、レギユレ
ータ、電磁弁である。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is a longitudinal cross-sectional view showing a laser processing head which is an embodiment of the present invention. The same parts as in FIG. 1 are designated by the same reference numerals, and detailed explanation thereof will be omitted. In the figure, 4a is an inner nozzle at the tip of the processing head 1, and 4b is an outer nozzle at the tip of the processing head 1. Each inner nozzle 4a and outer nozzle 4b are formed in a double structure. 7a is a low pressure processing gas, 7b is a high pressure processing gas, 8
a, 9a, and 10a are low-pressure processing gases 7, respectively.
These are the processing gas cylinder, regulator, and solenoid valve on the a side. Further, 8b, 9b, and 10b are a processing gas cylinder, a regulator, and a solenoid valve, respectively, on the high-pressure processing gas 7b side.
上記した様な構成を有するこの発明の一実施例
であるレーザ加工ヘツドでは、約１〜２Kg／cm2の
低圧力の加工ガス７ａ及び約５〜20Kg／cm2の高圧
力の加工ガス７ｂは、それぞれ第３図に矢印で示
す方向より加工ヘツド１に供給される。低圧力の
加工ガス７ａは、加工ヘツド１の内部のレーザ光
２と共に同軸方向に加工ヘツド１の先端部の内側
ノズル４ａより被加工物６上に噴射される。ま
た、高圧力の加工ガス７ｂは、加工ヘツド１の内
部へは供給されることなく、内側ノズル４ａと２
重構造を形成する外側ノズル４ｂより直後に、加
工ガスジエツト５となつて被加工物６上に噴射さ
れる。この場合、高圧力の加工ガス７ｂは、加工
ヘツド１の内部空間には加えられない構造とされ
ているので、レンズ３には不要な高圧力の加工ガ
ス７ｂは加えられず、このため、レンズ３が変形
することや破損することを防止できる。低圧力の
加工ガス７ａには、加工ヘツド１の内部のレンズ
３を汚損しない様に清浄な加工ガス（例えば酸
素、窒素、空気等）を使用し、また、高圧力の加
工ガス７ｂには、高圧力を有する最適な加工ガス
ジエツト５を形成するため、多量の加工ガスを必
要とするが、清浄な加工ガスである必要はないた
めに安価な加工ガスの使用が可能となる。これに
より、特に集光特性の良いシングルモードの大出
力レーザ光によつて厚い金属板等を切断する場
合、その切断幅は狭くなるが、強力な加工ガスジ
エツト５を形成できるために、金属板に対する切
断能力の低下することがない。 In the laser processing head which is an embodiment of the present invention having the above-mentioned configuration, a processing gas 7a with a low pressure of about 1 to 2 kg/cm 2 and a processing gas 7b with a high pressure of about 5 to 20 kg/cm 2 are used. , are supplied to the processing head 1 from the directions shown by arrows in FIG. The low-pressure processing gas 7a is injected onto the workpiece 6 from an inner nozzle 4a at the tip of the processing head 1 coaxially with the laser beam 2 inside the processing head 1. Furthermore, the high-pressure processing gas 7b is not supplied to the inside of the processing head 1, but is supplied to the inner nozzles 4a and 2.
The machining gas jet 5 is injected onto the workpiece 6 immediately after the outer nozzle 4b forming the heavy structure. In this case, since the structure is such that the high pressure processing gas 7b is not applied to the internal space of the processing head 1, unnecessary high pressure processing gas 7b is not applied to the lens 3. 3 can be prevented from being deformed or damaged. A clean processing gas (for example, oxygen, nitrogen, air, etc.) is used for the low pressure processing gas 7a so as not to contaminate the lens 3 inside the processing head 1, and a high pressure processing gas 7b is used. Although a large amount of processing gas is required to form the optimum processing gas jet 5 having a high pressure, it is not necessary to use a clean processing gas, so that an inexpensive processing gas can be used. As a result, when cutting a thick metal plate etc. using a single mode high power laser beam with particularly good focusing characteristics, the cutting width becomes narrow, but since a powerful machining gas jet 5 can be formed, it is possible to No reduction in cutting ability.
ここで、現実に炭酸ガスレーザを実例として見
るに、上記した従来例のものにおいては、レンズ
３には約１〜５Kg／cm2の圧力しか加えられないた
め、レーザ出力約2KWにおいて、鉄板では約９
mm、ステンレス板では約3.5mm程度の厚さの板ま
でしか切断することができなかつた。これに対
し、この発明のものにおいては、同じレーザ出力
で、鉄板では約20mm、ステンレス板では約６mm程
度の厚さの板まで十分に切断することができ、そ
の切断能力を飛躍的に上昇させ得ることが実証さ
れている。 Here, looking at a carbon dioxide laser as an actual example, in the conventional example mentioned above, only about 1 to 5 kg/cm 2 of pressure can be applied to the lens 3, so at a laser output of about 2 KW, an iron plate will 9
mm, and stainless steel plates could only be cut to a thickness of approximately 3.5 mm. On the other hand, with the device of the present invention, the same laser output can sufficiently cut iron plates up to about 20 mm thick and stainless steel plates about 6 mm thick, dramatically increasing the cutting ability. It has been proven that it can be obtained.
第４図はこの発明の他の実施例であるレーザ加
工ヘツドの先端部のノズル部分を示す拡大縦断面
図である。図に示す様なレーザ加工ヘツドでは、
内側ノズル４ａは、その先端部を流線形状とな
し、かつ外側ノズル４ｂより少しばかり、約１〜
10mm程度突出させる様にした構成を有する。この
様にすると、加工ガスジエツト５の絞られる位置
とレーザ光２の焦点位置Ａとを同一にすることが
でき、このため、被加工物６に対する切断能力を
一層向上させることができる。 FIG. 4 is an enlarged vertical sectional view showing a nozzle portion at the tip of a laser processing head according to another embodiment of the present invention. In the laser processing head as shown in the figure,
The inner nozzle 4a has a streamlined tip, and is slightly smaller than the outer nozzle 4b, about 1~
It has a structure in which it protrudes by about 10 mm. In this way, the position where the processing gas jet 5 is narrowed and the focal position A of the laser beam 2 can be made the same, and therefore the cutting ability for the workpiece 6 can be further improved.
この発明は以上説明した様に、レーザ加工ヘツ
ドにおいて、ノズルを内側ヘツドと外側ノズルの
２重構造に形成し、前記内側ノズルからは低圧力
の加工ガスをレーザ光と共に同軸的に噴射し、前
記外側ノズルからは高圧力の加工ガスを噴射する
様に構成したので、加工ヘツドの内部に設けられ
るレンズが、加工ガスの圧力によつて変形したり
破損したりすることを有効的に防止し、常時安定
した極めた高性能なレーザ加工を行うことができ
るレーザ加工ヘツドが得られるという優れた効果
を奏するものである。
As explained above, the present invention has a nozzle formed in a double structure of an inner head and an outer nozzle in a laser processing head, and a low pressure processing gas is injected from the inner nozzle coaxially with the laser beam. Since the structure is such that high-pressure processing gas is injected from the outer nozzle, the lens provided inside the processing head is effectively prevented from being deformed or damaged by the pressure of the processing gas. This has the excellent effect of providing a laser processing head that can perform stable and extremely high-performance laser processing at all times.
第１図は従来のレーザ加工ヘツドを示す縦断面
図、第２図は、第１図のレーザ加工ヘツドの使用
態様におけるレンズ部分を示す説明図、第３図は
この発明の一実施例であるレーザ加工ヘツドを示
す縦断面図、第４図はこの発明の他の実施例であ
るレーザ加工ヘツドの先端部のノズル部分を示す
拡大縦断面図である。
図において、１……加工ヘツド、２……レーザ
光、３……レンズ、４……ノズル、４ａ……内側
ノズル、４ｂ……外側ノズル、５……加工ガスジ
エツト、６……被加工物、７……加工ガス、７ａ
……低圧力の加工ガス、７ｂ……高圧力の加工ガ
ス、８，８ａ，８ｂ，……加工ガスボンベ、９，
９ａ，９ｂ……レギユレータ、１０，１０ａ，１
０ｂ……電磁弁、１１……スパツタ、１２……ド
ロスである。なお、各図中、同一符号は同一、又
は相当部分を示す。
Fig. 1 is a vertical cross-sectional view showing a conventional laser processing head, Fig. 2 is an explanatory view showing a lens portion in the usage mode of the laser processing head shown in Fig. 1, and Fig. 3 is an embodiment of the present invention. FIG. 4 is an enlarged longitudinal sectional view showing a nozzle portion at the tip of a laser processing head according to another embodiment of the present invention. In the figure, 1... processing head, 2... laser beam, 3... lens, 4... nozzle, 4a... inner nozzle, 4b... outer nozzle, 5... processing gas jet, 6... workpiece, 7...Processing gas, 7a
...Low pressure processing gas, 7b...High pressure processing gas, 8, 8a, 8b, ... Processing gas cylinder, 9,
9a, 9b...Regulator, 10, 10a, 1
0b... Solenoid valve, 11... Sputter, 12... Dross. In each figure, the same reference numerals indicate the same or equivalent parts.
Claims (1)
前記レーザ光と共に同軸的に噴射するノズルを有
するレーザ加工ヘツドにおいて、前記ノズルを内
側ノズルと外側ノズルの２重構造に形成し、前記
内側ノズルからは低圧力の加工ガスを前記レーザ
光と共に同軸的に噴射し、前記外側ノズルからは
高圧力の加工ガスを噴射する様にして成ることを
特徴とするレーザ加工ヘツド。 ２ 前記内側ノズルは、その先端部を流線形状と
なし、かつ前記外側ノズルより少し突出させる様
にしたことを特徴とする特許請求の範囲第１項記
載のレーザ加工ヘツド。[Scope of Claims] 1. In a laser processing head having a nozzle that focuses laser light with a lens and injects processing gas coaxially with the laser light, the nozzle is formed into a double structure of an inner nozzle and an outer nozzle. A laser processing head characterized in that a low-pressure processing gas is ejected from the inner nozzle coaxially with the laser beam, and a high-pressure processing gas is ejected from the outer nozzle. 2. The laser processing head according to claim 1, wherein the inner nozzle has a streamlined tip and projects slightly from the outer nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58149938A JPS6040684A (en) | 1983-08-17 | 1983-08-17 | Laser working head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58149938A JPS6040684A (en) | 1983-08-17 | 1983-08-17 | Laser working head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6040684A JPS6040684A (en) | 1985-03-04 |
| JPS6258835B2 true JPS6258835B2 (en) | 1987-12-08 |
Family
ID=15485842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58149938A Granted JPS6040684A (en) | 1983-08-17 | 1983-08-17 | Laser working head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6040684A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4720380B2 (en) * | 2005-08-31 | 2011-07-13 | 澁谷工業株式会社 | Laser processing equipment |
| DE102008030783B3 (en) * | 2008-06-28 | 2009-08-13 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Process for laser beam angle cutting of workpiece involving ultrasonic gas cutting stream generally useful in laser cutting operations gives higher quality products at increased cutting speeds |
| CN108406111B (en) * | 2018-03-08 | 2020-05-08 | 北京工业大学 | Optical fiber laser double-layer coaxial protection welding nozzle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5711689B2 (en) * | 1978-08-11 | 1982-03-05 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5711689U (en) * | 1980-06-25 | 1982-01-21 |
-
1983
- 1983-08-17 JP JP58149938A patent/JPS6040684A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5711689B2 (en) * | 1978-08-11 | 1982-03-05 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6040684A (en) | 1985-03-04 |
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