JP2622337B2 - Laser cutting method for thick stainless steel - Google Patents
Laser cutting method for thick stainless steelInfo
- Publication number
- JP2622337B2 JP2622337B2 JP5045814A JP4581493A JP2622337B2 JP 2622337 B2 JP2622337 B2 JP 2622337B2 JP 5045814 A JP5045814 A JP 5045814A JP 4581493 A JP4581493 A JP 4581493A JP 2622337 B2 JP2622337 B2 JP 2622337B2
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- stainless steel
- cut
- thick stainless
- laser beam
- 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 - Fee Related
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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
Description
【０００１】[0001]
【産業上の利用分野】本発明は厚板ステンレス鋼のレー
ザー切断方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laser cutting thick stainless steel.
【０００２】[0002]
【従来の技術】従来、例えば板厚１００mm以上の厚板ス
テンレス鋼のレーザー切断においては、図３模式図に示
すように、レーザー光１は集光ミラーボックス２に設置
された＃１集光ミラー３及び＃２集光ミラー４により集
光されて被切断物７に照射され、集光されたレーザー光
１が通過する切断ノズル５にはアシストガス６としてＯ
2 ガスが通常３〜５kgｆ／cm2 の高圧で供給され、切断
が行われる。しかしながらこのような方法では、板厚が
厚くなると、レーザー出力を大きくしても板厚の底部ま
で溶融できなくなり、貫通切断が不可能となってくる。
また切断開始時にレーザー光が貫通できないと、溶融金
属が排除できなくなるので図示のようなガウジング状態
となり、ガウジング状態になると、溶融金属の吹き返し
が生じ切断ノズルに溶融金属が付着したりしてノズルを
損傷する。更に板厚が厚くなると、切断時のドラグライ
ンが湾曲してくるためレーザー光が貫通させようとする
厚板の底部に届かなくなる。2. Description of the Related Art Conventionally, for example, in laser cutting of a thick stainless steel plate having a thickness of 100 mm or more, as shown in a schematic diagram of FIG. 3 and # 2 are condensed by the converging mirror 4 and irradiate the object 7 to be cut.
Two gases are usually supplied at a high pressure of 3 to 5 kgf / cm 2 and cutting is performed. However, in such a method, when the plate thickness is large, even if the laser output is increased, it is not possible to melt to the bottom of the plate thickness, and it becomes impossible to cut through.
Also, if the laser beam cannot penetrate at the start of cutting, the molten metal cannot be removed, so the gouging state as shown in the figure occurs.When the gouging state occurs, the molten metal blows back and the molten metal adheres to the cutting nozzle and the nozzle is cut off. Damage. When the plate thickness is further increased, the drag line at the time of cutting becomes curved, so that the laser beam does not reach the bottom of the thick plate to be penetrated.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、このような
事情に鑑みて提案されたもので、被切断物の底部をレー
ザー光で照射溶融させるとともに溶融金属の粘性を低下
させて厚板ステンレス鋼の貫通切断を可能とし、また切
断ノズルの損傷を防止でき、更に切断部の品質向上を図
ることができる厚板ステンレス鋼のレーザー切断方法を
提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above circumstances, and irradiates and melts the bottom of an object to be cut with a laser beam and lowers the viscosity of the molten metal to increase the thickness of the stainless steel plate. It is an object of the present invention to provide a laser cutting method for a thick stainless steel, which can cut through steel, prevent damage to a cutting nozzle, and further improve the quality of a cut portion.
【０００４】[0004]
【課題を解決するための手段】そのために本発明は、レ
ーザー光を集光ミラーボックスにより集光させたうえ切
断ノズルを通過させ厚板ステンレス鋼の被切断物に照射
し切断するにあたり、上記切断ノズルの断面を切断線方
向に長円形にするとともに上記集光ミラーボックスを同
方向にオシレートさせ、かつ被切断物の底部に鉄系のワ
イヤを連続送給することを特徴とする。In order to achieve the object, the present invention provides a method for cutting a laser beam, which is focused by a focusing mirror box and then passed through a cutting nozzle to irradiate a thick stainless steel workpiece. The cross section of the nozzle is made elliptical in the direction of the cutting line, the condenser mirror box is oscillated in the same direction, and an iron-based wire is continuously fed to the bottom of the object to be cut.
【０００５】[0005]
【作用】本発明厚板ステンレス鋼のレーザー切断方法に
おいては、集光ミラーボックスをオシレートさせてレー
ザー光を切断線方向にオシレートさせることにより、レ
ーザー光は被切断物底部の未切断部に照射される。その
位置に例えば後方のカーフより鉄系のワイヤが供給され
ると、このワイヤを溶融し酸化反応熱を生じ被切断物を
更に溶融し、アシストガスのＯ2 との反応で切断が促進
される。鉄系のワイヤは酸化溶融した状態で被切断物で
あるステンレス鋼の溶融金属と混ざり、溶融金属全体の
流動性を改善する。また切断ノズルはレーザー光の移動
量に対して干渉しないだけの長さを持った切断線方向に
長円形としたノズルを用いるため、アシストガスの作用
も被切断物表面側から底部裏面側まで広範囲に作用す
る。According to the laser cutting method of the present invention, a laser beam is irradiated to an uncut portion at the bottom of a workpiece by oscillating a focusing mirror box to oscillate the laser beam in a cutting line direction. You. The wire of iron than, for example behind the calf at that position is supplied, the wire was melted to further melt the object to be cut caused the oxidation reaction heat, the cleavage reaction of O 2 of the assist gas is promoted . The iron-based wire is mixed with the molten metal of the stainless steel as an object to be cut in an oxidized and molten state, and improves the fluidity of the entire molten metal. In addition, the cutting nozzle uses a nozzle that has an oval shape in the cutting line direction that has a length that does not interfere with the movement of the laser beam. Act on.
【０００６】[0006]
【実施例】本発明厚板ステンレス鋼のレーザー切断方法
の一実施例を説明すると、図１は本方法の実施態様を示
す模式図、図２は図１のII−IIに沿った断面図である。
上図において、レーザー光１は集光ミラーボックス２に
設置された＃１集光ミラー３，＃２集光ミラー４により
伝送されて、切断ノズル５を経由して厚板ステンレス鋼
の被切断物７に集光照射される。切断ノズル５の内側に
はアシストガス６が供給されており通常加圧されたＯ2
ガスを用いる。被切断物７の板厚の底部に向かって、鉄
系のワイヤ９がワイヤフィーダー１０により連続的に切
断部８のカーフより供給される。但しスタート時は被切
断物７の端面に供給される。集光ミラーボックス２は中
心を回転自在に支持されており、このミラーボックス２
をオシレートすると、集光レーザー光１は切断ノズル５
の中で切断線方向に往復運動することとなり、切断部８
のカーフ内でワイヤ９を照射し溶融させることとなる。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the laser cutting method for thick stainless steel according to the present invention will be described. FIG. 1 is a schematic view showing an embodiment of the present method, and FIG. is there.
In the above figure, a laser beam 1 is transmitted by a # 1 focusing mirror 3 and a # 2 focusing mirror 4 installed in a focusing mirror box 2 and passes through a cutting nozzle 5 to cut a thick stainless steel workpiece. 7 is focused and irradiated. An assist gas 6 is supplied inside the cutting nozzle 5 and normally pressurized O 2
Use gas. An iron-based wire 9 is continuously supplied from a kerf of a cutting unit 8 by a wire feeder 10 toward the bottom of the plate thickness of the workpiece 7. However, at the start, it is supplied to the end face of the workpiece 7. The focusing mirror box 2 is rotatably supported at its center.
When the laser beam is oscillated, the focused laser light 1
Reciprocate in the direction of the cutting line in the cutting section 8
The wire 9 is irradiated and melted in the kerf.
【０００７】かくしてこの方法によれば、レーザー光１
を切断線方向にオシレートさせながら切断することによ
り、被切断物７の底部をレーザー光１で照射溶融すると
ともに、被切断物７の底部に供給されるワイヤ９を溶融
し、酸化発熱反応を促進し、溶融金属の粘性を低下させ
て、厚板ステンレス鋼の被切断物７の貫通切断を可能と
する。また切断ノズル５をレーザー光１と干渉しないよ
うに長円形にしたことにより、レーザー切断部に大量の
アシストガス６を供給できることとなり、貫通切断と合
わせて切断ノズル５の損傷を防止できる。更に溶融金属
の粘性の低下により切断時のドロスの排除が容易となっ
て切断部の品質向上が図れる。Thus, according to this method, the laser beam 1
Is cut while being oscillated in the cutting line direction, so that the bottom of the object 7 is irradiated and melted by the laser beam 1 and the wire 9 supplied to the bottom of the object 7 is melted to promote the oxidative heat generation reaction. Then, the viscosity of the molten metal is reduced, and the workpiece 7 made of thick stainless steel can be cut through. In addition, since the cutting nozzle 5 is formed in an oblong shape so as not to interfere with the laser beam 1, a large amount of assist gas 6 can be supplied to the laser cutting portion, and the cutting nozzle 5 can be prevented from being damaged in combination with the penetrating cutting. Further, the dross at the time of cutting is easily removed due to the decrease in the viscosity of the molten metal, and the quality of the cut portion can be improved.
【０００８】[0008]
【発明の効果】要するに本発明によれば、レーザー光を
集光ミラーボックスにより集光させたうえ切断ノズルを
通過させ厚板ステンレス鋼の被切断物に照射し切断する
にあたり、上記切断ノズルの断面を切断線方向に長円形
にするとともに上記集光ミラーボックスを同方向にオシ
レートさせ、かつ被切断物の底部に鉄系のワイヤを連続
送給することにより、被切断物の底部をレーザー光で照
射溶融させるとともに溶融金属の粘性を低下させて厚板
ステンレス鋼の貫通切断を可能とし、また切断ノズルの
損傷を防止でき、更に切断部の品質向上を図ることがで
きる厚板ステンレス鋼のレーザー切断方法を得るから、
本発明は産業上極めて有益なものである。In summary, according to the present invention, when a laser beam is condensed by a converging mirror box and then passed through a cutting nozzle to irradiate a thick stainless steel workpiece and cut, a cross section of the cutting nozzle is used. And the converging mirror box is oscillated in the same direction in the cutting line direction, and an iron-based wire is continuously fed to the bottom of the object to be cut, so that the bottom of the object to be cut is irradiated with laser light. Laser cutting of thick stainless steel enables irradiation through melting and lowers the viscosity of the molten metal to enable through-cutting of thick stainless steel, prevents damage to the cutting nozzle, and improves the quality of the cut section. Get the way,
The invention is of great industrial value.
【図１】本発明厚板ステンレス鋼のレーザー切断方法の
一実施例の模式図である。FIG. 1 is a schematic view of one embodiment of a laser cutting method of a thick stainless steel according to the present invention.
【図２】図１のII−IIに沿った断面図である。FIG. 2 is a sectional view taken along the line II-II of FIG.
【図３】従来のレーザー切断方法の模式図である。FIG. 3 is a schematic view of a conventional laser cutting method.
１ レーザー光 ２ 集光ミラーボックス ３ ＃１集光ミラー ４ ＃２集光ミラー ５ 切断ノズル ６ アシストガス ７ 被切断物 ８ 切断部 ９ ワイヤ 10 ワイヤフィーダー REFERENCE SIGNS LIST 1 laser light 2 focusing mirror box 3 # 1 focusing mirror 4 # 2 focusing mirror 5 cutting nozzle 6 assist gas 7 workpiece 8 cutting section 9 wire 10 wire feeder
───────────────────────────────────────────────────── フロントページの続き (72)発明者 安保 昌憲 神戸市兵庫区和田崎町一丁目１番１号 三菱重工業株式会社 神戸造船所内 (56)参考文献 特開 昭57−181787（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masanori Abo 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (56) References JP-A-57-181787 (JP, A)
Claims (1)
集光させたうえ切断ノズルを通過させ厚板ステンレス鋼
の被切断物に照射し切断するにあたり、上記切断ノズル
の断面を切断線方向に長円形にするとともに上記集光ミ
ラーボックスを同方向にオシレートさせ、かつ被切断物
の底部に鉄系のワイヤを連続送給することを特徴とする
厚板ステンレス鋼のレーザー切断方法。1. A laser beam is condensed by a converging mirror box, passes through a cutting nozzle, and irradiates an object to be cut of thick stainless steel. When cutting, a cross section of the cutting nozzle is oblong in a cutting line direction. And a method of cutting the thick mirror stainless steel by oscillating the converging mirror box in the same direction and continuously feeding an iron-based wire to the bottom of the object to be cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5045814A JP2622337B2 (en) | 1993-02-10 | 1993-02-10 | Laser cutting method for thick stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5045814A JP2622337B2 (en) | 1993-02-10 | 1993-02-10 | Laser cutting method for thick stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06234090A JPH06234090A (en) | 1994-08-23 |
| JP2622337B2 true JP2622337B2 (en) | 1997-06-18 |
Family
ID=12729726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5045814A Expired - Fee Related JP2622337B2 (en) | 1993-02-10 | 1993-02-10 | Laser cutting method for thick stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2622337B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6676878B2 (en) | 2001-01-31 | 2004-01-13 | Electro Scientific Industries, Inc. | Laser segmented cutting |
| DE102008053397B4 (en) * | 2008-05-20 | 2012-12-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for the fusion cutting of workpieces with laser radiation |
| CN109732223A (en) * | 2019-01-30 | 2019-05-10 | 大族激光科技产业集团股份有限公司 | The device of wafer cutting |
| CN111644763A (en) * | 2020-07-17 | 2020-09-11 | 唐贺云 | Stainless steel plate cutting device |
| CN112756801B (en) * | 2020-12-18 | 2023-08-04 | 浙江泰仑电力集团有限责任公司 | Laser foreign matter removing device and method based on lens micro-vibration and steering control |
-
1993
- 1993-02-10 JP JP5045814A patent/JP2622337B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06234090A (en) | 1994-08-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19970121 |
|
| LAPS | Cancellation because of no payment of annual fees |