JPH04356380A - Laser marking method - Google Patents
Laser marking methodInfo
- Publication number
- JPH04356380A JPH04356380A JP3118936A JP11893691A JPH04356380A JP H04356380 A JPH04356380 A JP H04356380A JP 3118936 A JP3118936 A JP 3118936A JP 11893691 A JP11893691 A JP 11893691A JP H04356380 A JPH04356380 A JP H04356380A
- Authority
- JP
- Japan
- Prior art keywords
- laser
- marking
- workpiece
- marking method
- oxygen gas
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000010330 laser marking Methods 0.000 title claims description 16
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910001882 dioxygen Inorganic materials 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 abstract 1
- 150000002506 iron compounds Chemical class 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 239000010410 layer Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、たとえばノギスの目
盛線と目盛数字とに係る鮮明な黒色のマーキングを実現
するレーザマーキング方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser marking method for realizing clear black markings on scale lines and scale numbers of calipers, for example.
【０００２】0002
【従来の技術】従来、金属材料のワーク、たとえばノギ
スの主部に目盛線と目盛数字とをマーキングするには、
一つにはエッチングとインク塗布を併用した方法が、も
う一つにはレーザマーキング法がとられた。なお、マー
キングを施したいワークとしては一般に、ノギス，マイ
クロメータ，ブロック等の測定具や、ドリル，エンドミ
ル，バイト等の工具がある。[Prior Art] Conventionally, in order to mark scale lines and scale numbers on the main part of a metal workpiece, such as a caliper,
One method used a combination of etching and ink coating, and the other method used a laser marking method. Note that the workpieces to be marked generally include measuring tools such as calipers, micrometers, and blocks, and tools such as drills, end mills, and cutting tools.
【０００３】0003
【発明が解決しようとする課題】従来のエッチング法に
は、■工程段階が多く製作期間が長くなる、■大規模な
処理装置ないし処理設備が必要になる、■公害対策とし
ての廃液処理にコストがかかり、かつ面倒である──な
どの問題点がある。また、レーザマーキング法には、マ
スクを用いる方式であれ、偏向ミラーを用いる方式であ
れ、マーキング部分の黒色が薄いため、品質的に合格レ
ベルに達しにくい、または濃い黒色を得るのに工数がか
かる等の欠点がある。[Problems to be Solved by the Invention] Conventional etching methods have the following problems: ■ Many process steps, long production period; ■ Large-scale treatment equipment or treatment facilities are required; ■ Cost of waste liquid treatment as a pollution control measure. There are problems such as being time-consuming and troublesome. In addition, with laser marking methods, whether the method uses a mask or a method that uses a deflection mirror, the black of the marking part is thin, so it is difficult to reach a passing level in terms of quality, or it takes a lot of man-hours to obtain a deep black color. There are drawbacks such as.
【０００４】この発明の課題は、従来の技術がもつ以上
の問題点を解消し、ワーク表面への鮮明な黒色のマーキ
ング、たとえばノギスの目盛線と目盛数字とに係る鮮明
な黒色のマーキングを実現するレーザマーキング方法を
提供することにある。[0004] The object of the present invention is to solve the above-mentioned problems of the conventional technology and realize clear black markings on the surface of a workpiece, for example, clear black markings on the scale lines and scale numbers of a caliper. The object of the present invention is to provide a laser marking method that
【０００５】[0005]
【課題を解決するための手段】この課題を解決するため
に、請求項１に係るレーザマーキング方法は、ワークの
表面にレーザ光を照射してマーキングするとき、この照
射箇所に酸素ガスを吹き付ける。請求項２に係るレーザ
マーキング方法は、請求項１に記載の方法において、レ
ーザ光が、ＹＡＧレーザの連続波である。請求項３に係
るレーザマーキング方法は、請求項１または２に記載の
方法において、ワークが、鉄系材料からなる。[Means for Solving the Problems] In order to solve this problem, a laser marking method according to a first aspect of the present invention sprays oxygen gas onto the irradiated area when marking the surface of a workpiece by irradiating a laser beam. A laser marking method according to a second aspect of the present invention is the method according to the first aspect, wherein the laser beam is a continuous wave of a YAG laser. The laser marking method according to claim 3 is the method according to claim 1 or 2, wherein the workpiece is made of an iron-based material.
【０００６】[0006]
【作用】請求項１に係るレーザマーキング方法では、ワ
ークの表面にレーザ光を照射してマーキングするとき、
この照射箇所に酸素ガスが吹き付けられるから、照射加
熱による酸化が促進される。とくに請求項２に係るレー
ザマーキング方法では、レーザ光が、ＹＡＧレーザの連
続波であるから、ワークへの吸収がよく照射加熱量が大
きい。とくに請求項３に係るレーザマーキング方法では
、ワークが、鉄系材料からなるから、表面にとくに鮮明
な黒色酸化層が形成される。[Operation] In the laser marking method according to claim 1, when marking is performed by irradiating the surface of the workpiece with a laser beam,
Since oxygen gas is blown onto the irradiated area, oxidation due to irradiation heating is promoted. In particular, in the laser marking method according to the second aspect, since the laser light is a continuous wave of YAG laser, it is well absorbed into the workpiece and the amount of irradiation heating is large. In particular, in the laser marking method according to claim 3, since the workpiece is made of an iron-based material, a particularly sharp black oxide layer is formed on the surface.
【０００７】[0007]
【実施例】本発明に係るレーザマーキング方法の実施装
置について、その構成図である図１を参照しながら説明
する。図１において、ＹＡＧレーザ用の発振器１から出
射されたレーザ光が、各偏向ミラー２ｘ，２ｙによって
互いに直角に振られ、ｆθレンズ３を通ってワーク４の
表面を照射する。すなわち、レーザ光の照射点が、各偏
向ミラー２ｘ，２ｙによって走査され、この走査軌跡の
部分がマーキングされることになる。ワーク４はＸ軸テ
ーブル５に載置され、その動きに応じて一方向（Ｘ軸方
向）に送られる。なお、ｆθレンズ３は特殊な集光レン
ズで、各偏向ミラー２ｘ，２ｙによって振られて比較的
大きい角度で入射するレーザ光を、その入射角に応じて
偏位した、ワーク４の表面上箇所に合焦状態で照射させ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus for implementing a laser marking method according to the present invention will be described with reference to FIG. 1, which is a block diagram thereof. In FIG. 1, laser light emitted from a YAG laser oscillator 1 is deflected at right angles to each other by deflection mirrors 2x and 2y, passes through an fθ lens 3, and irradiates the surface of a workpiece 4. That is, the irradiation point of the laser beam is scanned by each deflection mirror 2x, 2y, and a portion of this scanning locus is marked. The workpiece 4 is placed on the X-axis table 5, and is sent in one direction (X-axis direction) according to its movement. Note that the fθ lens 3 is a special condensing lens that directs the laser beam deflected by the deflection mirrors 2x and 2y and incident at a relatively large angle to a location on the surface of the workpiece 4 that is deflected according to the angle of incidence. irradiate in focus.
【０００８】ワーク４はノギスの主部で、目盛線と目盛
数字とがマーキングされる。したがって、各目盛線の位
置に応じて、ワーク４はＸ軸テーブル５によって送られ
、目盛線のマーキングされるべき箇所が、ｆθレンズ３
の光軸と一致するように位置決めされる。次に、目盛線
の長さに応じて偏向ミラー２ｙの振れの角度位置が、図
示してない制御部およびアクチュエータによって決めら
れる。また、目盛数字は、対応する目盛線の箇所で、そ
の数字の形状によって予め定められた各偏向ミラー２ｘ
，２ｙの振れの角度位置に係る位置決め制御によって描
かれる。The workpiece 4 is the main part of the caliper, and is marked with scale lines and scale numbers. Therefore, the workpiece 4 is sent by the X-axis table 5 according to the position of each scale line, and the part to be marked on the scale line is
is positioned so that it coincides with the optical axis of the Next, the angular position of deflection of the deflection mirror 2y is determined according to the length of the scale line by a control section and an actuator (not shown). In addition, the scale numbers indicate each deflection mirror 2x predetermined by the shape of the number at the location of the corresponding scale line.
, 2y by positioning control related to the angular position of the runout.
【０００９】ところで、レーザ光の照射箇所の近傍に酸
素ガス用のノズル６が設置され、このノズル６から噴射
される酸素ガスが、照射箇所に吹き付けられるように構
成される。なお、ワーク４の材料はこの場合ステンレス
鋼であるから、マーキング用のＹＡＧレーザを良く吸収
するとともに、同時に吹き付けられる酸素ガスによって
照射加熱による酸化作用が促進され、ワーク４の表面に
黒色酸化層が形成される。一般に鉄系の金属材料につい
ては、ＹＡＧレーザの吸収が良く、酸化によって鮮明な
色の黒色酸化層が得られる。[0009] By the way, an oxygen gas nozzle 6 is installed in the vicinity of the laser beam irradiation location, and the structure is such that the oxygen gas injected from this nozzle 6 is blown onto the irradiation location. In addition, since the material of the workpiece 4 is stainless steel in this case, it absorbs the YAG laser for marking well, and the oxidation effect due to irradiation heating is promoted by the oxygen gas sprayed at the same time, so that a black oxide layer is formed on the surface of the workpiece 4. It is formed. In general, iron-based metal materials have good absorption of YAG laser, and oxidation produces a black oxide layer with a clear color.
【００１０】またＹＡＧレーザは、繰返しパルス波でも
よいが、連続波の方が黒色の鮮明さにすぐれるという結
果が得られている。これは連続波の方が熱エネルギー量
が多く、酸化作用が促進され鮮明な黒色酸化層を得るの
に有効であることによる。すなわち、照射箇所のステン
レス鋼は、蒸発して彫り込まれる形で、非常に浅く内面
が粗い凹部となり、同時にその内面の表層部分が黒色酸
化される。この場合、彫り込みの深さより、酸化による
黒色化の方が目的であるから、彫り込みの深さに効果的
な繰返しパルス波のレーザ光より、酸化に効果的な連続
波のレーザ光が選ばれることになる。[0010]Although the YAG laser may use a repetitive pulse wave, results have been obtained in which a continuous wave provides superior black clarity. This is because continuous waves have a larger amount of thermal energy, promote oxidation, and are effective in obtaining a clear black oxide layer. That is, the stainless steel at the irradiated area is evaporated and carved into a very shallow recess with a rough inner surface, and at the same time, the surface layer of the inner surface is oxidized black. In this case, since the objective is to achieve blackening through oxidation rather than the depth of the engraving, a continuous wave laser beam, which is more effective for oxidation, is selected over a repetitive pulse wave laser beam, which is more effective for reducing the depth of the engraving. become.
【００１１】以上、偏向ミラーを用いたマーキング方式
について説明したが、マスクを用いたマーキング方式に
ついても、酸素ガスを吹き付けることで同様の効果が得
られることが確認されている。Although the marking method using a deflection mirror has been described above, it has been confirmed that similar effects can be obtained by spraying oxygen gas with a marking method using a mask.
【００１２】0012
【発明の効果】請求項１に係るレーザマーキング方法で
は、ワークの表面にレーザ光を照射してマーキングする
とき、この照射箇所に酸素ガスが吹き付けられるから、
照射加熱による酸化が促進される。したがって、■ワー
ク材料の鮮明な黒色酸化層が得られ、マーキング品質に
優れ、■単一工程で、かつマーキング工数が小さくてす
み、関連して製作期間の短縮化、生産性向上が図れ、■
清浄な雰囲気で作業が可能であり、大規模な設備および
公害対策の必要がなく、■総合的に品質が良く、コスト
パフォーマンスが良い──などの効果がある。また、請
求項２によれば、レーザ光のワークへの吸収がよく照射
加熱量が大きいため、酸化促進と黒色の鮮明化が支援さ
れ、請求項３によれば、ワークの材料特性に基づき表面
に鮮明な黒色酸化層が形成されることが支援される。Effects of the Invention In the laser marking method according to claim 1, when marking the surface of the workpiece by irradiating the laser beam, oxygen gas is blown onto the irradiated area.
Oxidation due to irradiation and heating is promoted. Therefore, ■A clear black oxide layer can be obtained on the workpiece material, and the marking quality is excellent.■It is a single process and requires only a small number of marking steps, which in turn shortens the production period and improves productivity.■
It allows work to be carried out in a clean atmosphere, does not require large-scale equipment or anti-pollution measures, and has the following benefits: - Overall quality is good and cost performance is good. Further, according to claim 2, the absorption of the laser beam into the workpiece is good and the irradiation heating amount is large, so that oxidation promotion and black color sharpening are supported.According to claim 3, the surface of the workpiece is The formation of a clear black oxide layer is supported.
【図１】本発明に係る方法の実施装置の構成図FIG. 1: A configuration diagram of an apparatus for implementing the method according to the present invention.
１ レーザ発振器 ２ｘ，２ｙ 偏向ミラー ３ ｆθレンズ ４ ワーク ５ Ｘ軸テーブル ６ ノズル 1 Laser oscillator 2x, 2y deflection mirror 3 fθ lens 4 Work 5 X-axis table 6 Nozzle
Claims (3)
ングするとき、この照射箇所に酸素ガスを吹き付けるこ
とを特徴とするレーザマーキング方法。1. A laser marking method, which comprises spraying oxygen gas onto the irradiated area when marking the surface of a workpiece by irradiating a laser beam.
は、ＹＡＧレーザの連続波であることを特徴とするレー
ザマーキング方法。2. The laser marking method according to claim 1, wherein the laser light is a continuous wave of a YAG laser.
ワークは、鉄系材料からなることを特徴とするレーザマ
ーキング方法。3. The method according to claim 1 or 2,
A laser marking method characterized in that the workpiece is made of iron-based material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3118936A JPH04356380A (en) | 1991-05-24 | 1991-05-24 | Laser marking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3118936A JPH04356380A (en) | 1991-05-24 | 1991-05-24 | Laser marking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04356380A true JPH04356380A (en) | 1992-12-10 |
Family
ID=14748897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3118936A Pending JPH04356380A (en) | 1991-05-24 | 1991-05-24 | Laser marking method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04356380A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017505511A (en) * | 2013-12-19 | 2017-02-16 | ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド | Battery with non-conductive structured surface |
| CN108025392A (en) * | 2015-10-09 | 2018-05-11 | 东丽工程株式会社 | Marking device |
| JP2020077603A (en) * | 2018-11-08 | 2020-05-21 | 日本特殊陶業株式会社 | Internal combustion engine part and manufacturing method thereof |
-
1991
- 1991-05-24 JP JP3118936A patent/JPH04356380A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017505511A (en) * | 2013-12-19 | 2017-02-16 | ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド | Battery with non-conductive structured surface |
| CN108025392A (en) * | 2015-10-09 | 2018-05-11 | 东丽工程株式会社 | Marking device |
| JP2020077603A (en) * | 2018-11-08 | 2020-05-21 | 日本特殊陶業株式会社 | Internal combustion engine part and manufacturing method thereof |
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