JPS62104690A - Laser beam cutting method - Google Patents

Abstract

PURPOSE:To perform the processing having no sticking of a melting material on the back face by performing a laser beam cutting after fixing in contact by pouring a fluid between the bodies to be worked in case of cutting the body to be worked by overlapping >=two sheets. CONSTITUTION:The body 5 to be worked in thin thickness which is overlapped >=two sheets is fixed by contact-fitting with a clamping device 6 by pouring the liquid 8 of water, oils, etc., therein. THe work having no sticking of melting materials on the back face is performed due to the assisting gas passing through the cut groove smoothly and removing the melting material, when the body 5 to be worked and liquid 8 are cut with the laser beam simultaneously by laser beam 1 in this state.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、肉厚の薄い被加工物を２枚以上重ねてレー
ザビームにより切断するレーザ切断方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a laser cutting method in which two or more thin-walled workpieces are overlapped and cut by a laser beam.

〔従来の技術〕[Conventional technology]

従来のこの種のレーザ切断方法は第３図に示すようにし
て行われている同図において、（１）はレーザ発振器（
図示せず）から出射されたレーザビーム、（２）はレー
ザビーム（１）を加工の目的にあったエネルギー密度に
集光する集光レンズ、（３）はアンストガス供給口、（
４）は集光レンズ（２）の下にもうけられたレーザビー
ム（１）と同軸の円筒状゛のアーレストガスノズルであ
り、（５）は被加工物、（６）は被加工物（５）を密着
させ重ねろためのクランプ装置である。This type of conventional laser cutting method is carried out as shown in Figure 3. In the figure, (1) is a laser oscillator (
(2) is a condensing lens that focuses the laser beam (1) to an energy density suitable for the purpose of processing, (3) is an unstuck gas supply port, (
4) is a cylindrical arrest gas nozzle coaxial with the laser beam (1) provided under the condensing lens (2), (5) is the workpiece, and (6) is the workpiece (5). ) is a clamping device that allows them to be tightly stacked.

次に動作について説明する。図示しないレーザ発振器よ
り放出されたレーザビーム（１）（よ集光レンズ（２）
で集光され、ノズル（４）を通過して被加工物（５）に
照射される。この時、被加工物（５）を矢印で示すよう
に移動することにより、被加工物（５）は任意の形状に
切断され、またアンストガス供給口（３）より導入され
たガスはノズル（４）を通して被加工物（５）上に噴ｑ
寸され、このガス（こよりン容融あろい（ま蒸発した金
属が除去される。そして被加工物が比較的薄く、重ねて
切断できる場合は、クランプ装置（６）等により外力に
より密着させて切断する。Next, the operation will be explained. A laser beam (1) emitted from a laser oscillator (not shown) (and a condensing lens (2)
The light is focused by the beam, passes through the nozzle (4), and is irradiated onto the workpiece (5). At this time, by moving the workpiece (5) as shown by the arrow, the workpiece (5) is cut into an arbitrary shape, and the gas introduced from the unstuck gas supply port (3) is passed through the nozzle (4). ) onto the workpiece (5)
The vaporized metal is removed by melting the gas (gas) and removing the evaporated metal.If the workpieces are relatively thin and can be cut in layers, they are held together by external force using a clamping device (6), etc. disconnect.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

第４図はこのような方法により肉厚の薄い被加工物を２
枚以上重ねて切断した場合の切断部横断面を示したもの
である。レーザ出力、加工速度等をいかに適切に制御し
ても、また、いかに強くりランプ装置（６）を絞めたと
しても、切断時に被加工物（５）間に隙間が生し、アレ
ストガスの流れが悪くなり、切断部下部の裏ｍｌに溶融
材料の付着（７）が起こるという問題点があつｔ：。Figure 4 shows how two thin-walled workpieces are processed using this method.
This figure shows a cross section of a cut portion when two or more sheets are cut in an overlapped manner. No matter how appropriately the laser output, processing speed, etc. are controlled, and no matter how strongly the lamp device (6) is tightened, a gap will be created between the workpieces (5) during cutting, and the flow of arrest gas will be interrupted. There is a problem that the molten material (7) adheres to the back ml at the bottom of the cut part.

この発明はＬ記のような問題点を解消するためになされ
たもので、屯ね切断において被加工物を密着させ、溶融
材料の被加工物裏面への付着をなくずろこと可能にしｔ
−レーザ切断法を得ることを目的とする。This invention was made in order to solve the problem as described in L. It is possible to bring the workpiece into close contact with each other during cross-cutting and eliminate the adhesion of molten material to the back surface of the workpiece.
- Aiming at obtaining a laser cutting method.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係ろレーザ切断法は、肉厚の薄い波加工物を
重ねてレーザビームにより切断するレーザ切断法におい
て、前記被加工物間に水・油などの液体を注入し、密着
して重ね、その後この被加工物をレーザビームにより切
断するようにしたことを特徴とするレーザ切断法、。The laser cutting method according to the present invention is a laser cutting method in which thin corrugated workpieces are overlapped and cut by a laser beam, in which a liquid such as water or oil is injected between the workpieces, and the workpieces are stacked closely together. , a laser cutting method characterized in that the workpiece is then cut by a laser beam.

〔作用〕 この発明においては前記の液体による表面張力により被
加工物どうしが完全に密着し、このため、切断者のアン
ストガスの流れが乱れることなく最下位の被加工物まで
噴射され、溶融材料を完全に除去する。[Operation] In this invention, the workpieces are brought into perfect contact with each other due to the surface tension caused by the liquid, so that the cutter's cutting gas is injected to the lowest workpiece without turbulence, and the molten material is Remove completely.

〔発明の実施例〕[Embodiments of the invention]

以下、この発明の一実施例を図について説明ずろ。第１
図において、（１）ばレーザ発振器より出射されたレー
ザビーム、（２）はレーザビーム（１）を加工の目的に
あったエネルギ密度に集光する集光レンズ、（３）はア
シストガス供給口、（４）は集光レンズ（２）の下にも
うけられたレーザビーム（１）と同軸の円筒状のアシス
トガス、ノズルであり、（５）は被加工物、（６）は被
加工物を密着保持するためのクランプ装置、（８）は被
加工物間に注入した液体である。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (1) is the laser beam emitted from the laser oscillator, (2) is the condensing lens that focuses the laser beam (1) to an energy density that matches the purpose of processing, and (3) is the assist gas supply port. , (4) is a cylindrical assist gas and nozzle coaxial with the laser beam (1) that is provided under the condenser lens (2), (5) is the workpiece, and (6) is the workpiece. A clamp device (8) is a liquid injected between the workpieces to hold the workpieces in close contact with each other.

第１図において、レーザ切断装置自体は従来のものと同
一であるが、重ねた波加工物（５）間には水油などの液
体（８）が注入されている。このような構成により、レ
ーザビーム（１）により被加工物（５）および液体（８
）を同時にレーザ切断すると、アシストガスがスムーズ
に切断溝を通過し、溶融材料を除去するので第２図に示
すように、裏面に溶融材料の付着のない加工が行われる
。In FIG. 1, the laser cutting device itself is the same as the conventional one, but a liquid (8) such as water or oil is injected between the stacked corrugated objects (5). With this configuration, the workpiece (5) and the liquid (8) are irradiated with the laser beam (1).
) is laser-cut at the same time, the assist gas smoothly passes through the cutting groove and removes the molten material, so that processing is performed without molten material adhering to the back side, as shown in FIG.

〔発明の効果〕〔Effect of the invention〕

息子説明したように本発明に係るレーザ切断方法：よ、
被加工物を２枚以上重ねて切断する場合、波加工物の間
に水　油などの液体を注入し、密着固定し、この液体と
ともにレーザ切断するようにしたので、裏面に溶融材料
の付着のない加工が行われ、レーザ加工の後加工の省略
をなすことができろという効果を奏する。Laser cutting method according to the present invention as explained by my son:
When cutting two or more workpieces stacked one on top of the other, a liquid such as water or oil is injected between the corrugated workpieces to secure them tightly, and the laser cutting is performed together with this liquid, which prevents molten material from adhering to the back side. This has the effect that processing after laser processing can be omitted.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの発明の一実施例を示す断面図、第２図（よ
発明の効果を示す断面図、第３図は従来法を示す断面図
、第４図は従来法の問題点を示す断面図である。 （１）はレーザビーム、（２）は集光し・ンズ、（３）
はアシストガス供給口、（４）はノズル、（５）は被加
工物、（６）はつうノブ装置、（８）は注入した液体で
ある。 なお、図中同−符冴は同一または相当部分を示ず１） 代理人　弁理士　佐　藤　正　年 第２図Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a sectional view showing the effects of the invention, Fig. 3 is a sectional view showing the conventional method, and Fig. 4 is a sectional view showing the problems of the conventional method. It is a cross-sectional view. (1) is a laser beam, (2) is a condensing lens, (3) is a laser beam.
(4) is an assist gas supply port, (4) is a nozzle, (5) is a workpiece, (6) is a feed knob device, and (8) is an injected liquid. Note that the same numbers in the figures do not indicate the same or corresponding parts.1) Agent Patent Attorney Masaru Sato Figure 2

Claims (1)

【特許請求の範囲】[Claims] 肉厚の薄い被加工物を重ねてレーザビームにより切断す
るレーザ切断法において、前記被加工物間に液体を注入
し、密着して重ね、その後この被加工物をレーザビーム
により切断するようにしたことを特徴とするレーザ切断
法。In a laser cutting method in which thin workpieces are overlapped and cut by a laser beam, a liquid is injected between the workpieces, the workpieces are closely stacked, and then the workpieces are cut by the laser beam. A laser cutting method characterized by: