JPH0360890A - Laser beam welding apparatus - Google Patents
Laser beam welding apparatusInfo
- Publication number
- JPH0360890A JPH0360890A JP1196699A JP19669989A JPH0360890A JP H0360890 A JPH0360890 A JP H0360890A JP 1196699 A JP1196699 A JP 1196699A JP 19669989 A JP19669989 A JP 19669989A JP H0360890 A JPH0360890 A JP H0360890A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- temp
- flow rate
- lens
- auxiliary 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
- 238000003466 welding Methods 0.000 title claims description 9
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000011109 contamination Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 3
- 239000000498 cooling water Substances 0.000 abstract description 2
- 239000008236 heating water Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 55
- 230000000694 effects Effects 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen 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
- B23K26/146—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 the fluid stream containing a liquid
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はレーザ溶接装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a laser welding device.
レーザ溶接法は、ビーム径が小さいため入熱量が少なく
、入熱があまりできない材料の溶接に適しており、また
シールドガスを供給して行うため無酸化状態での溶接が
可能である等、種々の利点を有している。第２図はこの
ようなレーザ溶接用の加工ヘッドを（１４）を示したも
ので、レーザ発振器（１１）から発せられたレーザ光線
（１２）は反射鏡（１３）によりノズル（１６）内に導
かれ、集光レンズ（１５）で集光された後、ノズル口か
ら被溶接材（１７）に照射される。ノズル口の前面には
シールドガスとプラズマ除去ガスが供給（図示せず）さ
れ、また、ノズル内部には、■溶融メタルを外気からシ
ールドする。Laser welding has a small beam diameter, so the amount of heat input is small, making it suitable for welding materials that cannot receive much heat.Also, since it is performed by supplying shielding gas, it is possible to weld in a non-oxidized state, and so on. It has the following advantages. Figure 2 shows such a processing head (14) for laser welding, in which the laser beam (12) emitted from the laser oscillator (11) is directed into the nozzle (16) by the reflector (13). After being guided and condensed by a condensing lens (15), the material to be welded (17) is irradiated from the nozzle opening. A shielding gas and a plasma removal gas (not shown) are supplied to the front surface of the nozzle opening, and inside the nozzle, (1) shields the molten metal from the outside air;
■スパッタ、ヒユームなどによるレンズの汚染を防止す
る。■Prevent lens contamination due to spatter and fumes.
■レンズが熱膨張して焦点距離が変化するのを防止する
ためレンズを冷却する。■ Cool the lens to prevent it from thermally expanding and changing its focal length.
等を目的としてＡｒ等の補助ガスが供給される。Auxiliary gas such as Ar is supplied for this purpose.
ノズル内に供給される補助ガスは上記■、■の点からあ
る程度の流量が必要とされる。The auxiliary gas supplied into the nozzle requires a certain flow rate in view of points (1) and (2) above.
しかし、補助ガスの温度は外気温に近いため、例えば寒
冷期においては集光レンズ（１５）を過冷却し、レンズ
に歪みやくもりを生じさせ、溶接部の品質劣化を招く。However, since the temperature of the auxiliary gas is close to the outside temperature, the condenser lens (15) is supercooled during cold seasons, causing distortion and cloudiness in the lens, leading to deterioration in the quality of the welded part.
また逆に外気温が高くなり過ぎると、集光レンズの冷却
効率が悪化し、レンズの冷却が適切に行われず、この場
合もレンズの熱膨張によって溶接部の品質劣化を招いて
しまう。On the other hand, if the outside temperature becomes too high, the cooling efficiency of the condensing lens will deteriorate, and the lens will not be properly cooled, and in this case as well, the quality of the welded part will deteriorate due to thermal expansion of the lens.
このようなことから、従来１例えば外気温が極端に低い
ような場合には、冷却ガスの流量を落し、シールドガス
の流量を増大させる等の対策もとられているが、上記の
ように補助ガスの流量を落すとレンズの汚染が激しくな
り、レンズを頻繁に清掃する必要があった。For this reason, conventional measures have been taken such as reducing the flow rate of cooling gas and increasing the flow rate of shielding gas when the outside temperature is extremely low. Reducing the gas flow rate increased contamination of the lens, necessitating frequent cleaning of the lens.
本発明は、このような従来の問題に鑑み、補助ガスによ
り外気のシールドとスパッタ等によるレンズの汚染防止
を図りつつ、レンズを適度に冷却し、もって良好な品質
の溶接部を得ることができるレーザ溶接装置を提供しよ
うとするものである。In view of such conventional problems, the present invention uses an auxiliary gas to shield the outside air and prevent contamination of the lens by spatter, etc., while cooling the lens appropriately, thereby making it possible to obtain a welded part of good quality. The present invention aims to provide a laser welding device.
〔課題を解決するための手段および作用〕本発明者らは
、上記のような問題に鑑み、補助ガスの温度と流量との
関係、さらにはこれらとレンズ冷却能、レンズ汚染防止
および外気シールド作用との関係について検討を行い、
その結果、補助ガスの温度とノズル先単位面積当りの流
量とを特定の範囲に規制して補助ガスを流すことにより
、上記問題を生じることなく、良好な品質の溶接部が得
られることを見い出した。[Means and effects for solving the problem] In view of the above-mentioned problems, the inventors of the present invention have developed the relationship between the temperature and flow rate of the auxiliary gas, and the relationship between these and the lens cooling ability, lens contamination prevention, and outside air shielding effect. We will consider the relationship with
As a result, it was discovered that by regulating the temperature of the auxiliary gas and the flow rate per unit area of the nozzle tip and flowing the auxiliary gas within a specific range, welds of good quality could be obtained without the above problems. Ta.
そこで本発明では、補助ガスをヘッド内に供給するため
の補助ガス供給系にガスの加熱および冷却機能を備えた
温度調整装置を設け、ガス流量等に応じガス温度を調整
できるような装置構成とし、外気温に関係なくレンズの
適切な冷却を可能としたものである。Therefore, in the present invention, the auxiliary gas supply system for supplying auxiliary gas into the head is provided with a temperature adjustment device having gas heating and cooling functions, and the device is configured such that the gas temperature can be adjusted according to the gas flow rate, etc. This makes it possible to properly cool the lens regardless of the outside temperature.
第１図は本発明における補助ガス供給系の一実施例を示
すものである。FIG. 1 shows an embodiment of an auxiliary gas supply system according to the present invention.
図において、（１）は補助ガスのガスボンベ、（２）は
圧力調整装置、（３）はガス温度調整装置、（４）は流
量調整器であり、前記ガス温度調整装置！（３）は、ガ
ス加熱用熱交換器（５ａ）とガス冷却用熱交換器（５ｂ
）とにより構成されている。In the figure, (1) is a gas cylinder for auxiliary gas, (2) is a pressure regulator, (3) is a gas temperature regulator, and (4) is a flow regulator. (3) consists of a gas heating heat exchanger (5a) and a gas cooling heat exchanger (5b).
).
ガスボンベ（１）から供給される補助ガスは、圧力調整
器（２）で圧力調整がなされた後、温度調整装置（３）
で温度調整がなされ、さらに流量調整器（４）を経てレ
ーザ溶接器のヘッド内に供給される。The auxiliary gas supplied from the gas cylinder (1) is pressure-regulated by the pressure regulator (2), and then transferred to the temperature regulator (3).
The temperature is adjusted at , and the gas is further supplied into the head of the laser welder via a flow rate regulator (4).
ガス加熱用熱交換器（５ａ）とガス冷却用熱交換器（５
ｂ）には、それぞれ加熱用、冷却用として蒸気と冷却水
が供給され、これらの流体はその供給管（８ａ）（８ｂ
）に設けられた流量調整弁（７ａ） （７ｂ）により流
量が調整される。Gas heating heat exchanger (5a) and gas cooling heat exchanger (5a)
b) is supplied with steam and cooling water for heating and cooling, respectively, and these fluids are passed through their supply pipes (8a) (8b).
) The flow rate is adjusted by flow rate regulating valves (7a) and (7b) provided in (7a) and (7b).
温度調整装置（３）の出側では、温度計（９）により補
助ガスの温度が測定され、この測定温度に基づき、温度
制御装置（６）が前記流量調整弁（７ａ）（７ｂ）の開
閉及び開度を制御し、補助ガスの温度制御を行う。On the outlet side of the temperature adjustment device (3), the temperature of the auxiliary gas is measured by a thermometer (9), and based on this measured temperature, the temperature control device (6) controls the opening and closing of the flow rate adjustment valves (7a) and (7b). and opening degree to control the temperature of the auxiliary gas.
なお１図において（１０）は保温配管である。また、補
助ガスが供給されるヘッドの構造は第２図に示した通り
である。In Fig. 1, (10) is a heat insulation pipe. The structure of the head to which the auxiliary gas is supplied is as shown in FIG.
以上のような補助ガス供給系からのヘッドへのガス供給
は、例えば、次のようにして行われる。Gas is supplied to the head from the auxiliary gas supply system as described above, for example, as follows.
上述したように、本発明者らはレンズを適切に冷却でき
、しかもレンズ汚染防止および外気シールド作用も確実
に得られる補助ガス温度と流量の範囲を見い出したもの
である。第３図はヘッド内に供給される補助ガスの温度
Ｔとヘッドノズル先の単位面積当りの補助ガス流量Ｑが
溶接部品質に及ぼす影響を調べたものであり、これによ
れば、温度Ｔ（’Ｃ）とノズル先の単位面積当りの流量
Ｑ （Ｑ １ｉｒｒ”・ｆｆ１１２）が、０、ＩＴ−１
，０≦Ｑ≦０．１Ｔ ＋ ０．５の条件を満足する場合
にのみ、良好な品質の溶接部が得られている。As described above, the present inventors have found a range of auxiliary gas temperature and flow rate that can appropriately cool the lens and also reliably provide lens contamination prevention and outside air shielding effects. Figure 3 shows the effects of the temperature T of the auxiliary gas supplied into the head and the flow rate Q of the auxiliary gas per unit area of the head nozzle tip on the quality of the weld. 'C) and the flow rate per unit area of the nozzle tip Q (Q 1irr"・ff112) are 0, IT-1
, 0≦Q≦0.1T + 0.5, good quality welds were obtained only when the following conditions were satisfied.
ここで、Ｑ＞０．ＩＴ＋０．５では、補助ガスの温度が
低過ぎるか、或いはガス温度がある程度高い状態でもガ
ス流量が多過ぎ、レンズが過冷却となる。このため、レ
ンズに歪みやくもりが生じて焦点距離が変わり、良好な
溶接部品質が得られない。Here, Q>0. At IT+0.5, the temperature of the auxiliary gas is too low, or even if the gas temperature is high to some extent, the gas flow rate is too large, resulting in overcooling of the lens. As a result, distortion and cloudiness occur in the lens, the focal length changes, and good quality of the welded part cannot be obtained.
一方、Ｑ ＜０．ＩＴ−１，０では、補助ガスの温度が
高過ぎるか、或いはガス温度がある程度低い状態でもガ
ス流量が少な過ぎ、レンズが冷却不足となる。そして、
この場合にもレンズ歪により焦点距離が変わり、良好な
溶接部品質が得られない。On the other hand, Q <0. In IT-1, 0, the temperature of the auxiliary gas is too high, or even if the gas temperature is low to some extent, the gas flow rate is too low, resulting in insufficient cooling of the lens. and,
In this case as well, the focal length changes due to lens distortion, making it impossible to obtain good welded part quality.
また、ガス流量Ｑが１．０Ｑ１ｉ−・ｓｕｍ−”未満で
は、補助ガスによるレンズの汚染防止作用が十分でなく
、加えて、溶接部の外気（酸素雰囲気）とのシールド性
も悪く、溶接部品質が悪化する。In addition, if the gas flow rate Q is less than 1.0Q1i-・sum-'', the effect of preventing contamination of the lens by the auxiliary gas will not be sufficient, and in addition, the shielding property of the welded part from the outside air (oxygen atmosphere) will be poor, and the welded part will be Quality deteriorates.
一方、ガス流量Ｑが３．ＯＱ −ｍｉＩｆ”ｒｓｒａ−
”を超えると、ガスの圧力で溶接部の溶融金属が飛散し
、この場合にも溶接部品質が確保できない。On the other hand, the gas flow rate Q is 3. OQ -miIf"rsra-
If the temperature exceeds 100%, the molten metal in the weld will scatter due to the gas pressure, and the quality of the weld cannot be ensured in this case as well.
以上の理由から、補助ガスはその温度Ｔ（’Ｃ）とヘッ
ドノズル先の単位面積当りのガス流量Ｑ（Ｑ、・−イト
ｒｍｉ” ）を、
１．０≦Ｑ≦３．０
０．１Ｔ−１，０≦Ｑ≦０．ＩＴ ＋ ０．５に規制し
て、ヘッド内に供給することが好ましｔ）。For the above reasons, the temperature T ('C) of the auxiliary gas and the gas flow rate per unit area at the head nozzle tip Q (Q, . -1,0≦Q≦0.IT + 0.5 is preferably regulated and supplied into the head (t).
したがって、第１図に示す本発明装置では、例えば、補
助ガスの流量をある一定の値（Ｑ＝１゜０〜３．０１２
−ｍｌに１・ｍａｒ”の範囲）に設定しておき、これか
ら求めるノズル先単位面積当りのガス流量Ｑに対し、補
助ガス温度Ｔが
０、ＩＴ−１，０≦Ｑ≦０．ＩＴ＋０．５の条件を満た
すよう、温度制御装置（６）により流量ｙＡ整弁（７ａ
） （７ｂ）の制御を行う。Therefore, in the apparatus of the present invention shown in FIG.
-ml in the range of 1・mar"), and for the gas flow rate Q per unit area of the nozzle tip calculated from this, the auxiliary gas temperature T is 0, IT-1,0≦Q≦0.IT+0.5 The temperature control device (6) controls the flow rate yA regulating valve (7a) so as to satisfy the conditions of
) (7b) is performed.
なお、一般１こ補助ガスとしてはＡｒが用いられるが、
厳しい溶接条件が要求される場合にはｌｉｅが用いられ
ることもある。Note that Ar is generally used as the auxiliary gas, but
Lie is sometimes used when severe welding conditions are required.
以上述べた本発明によれば、補助ガスにより外気シール
ドとスパッタ等によるレンズの汚染防止を図りつつ、外
気温に関係なくレンズを適正に冷却し、良好な品質の溶
接部を得ることができる。According to the present invention described above, it is possible to properly cool the lens regardless of the outside temperature and obtain a welded part of good quality while shielding the lens from outside air and preventing contamination of the lens by spatter etc. using the auxiliary gas.
第１図は本発明における補助ガス供給系の一実施例を示
す説明図である。第２図はレーザ溶接機の原理説明図で
ある。第３図はヘッド内に供給される補助ガスの温度Ｔ
とノズル先単位面積当りの補助ガス流量Ｑが溶接部品質
に及ぼす影響を示したものである。
第２図
２
第３図FIG. 1 is an explanatory diagram showing one embodiment of an auxiliary gas supply system in the present invention. FIG. 2 is a diagram explaining the principle of a laser welding machine. Figure 3 shows the temperature T of the auxiliary gas supplied into the head.
This figure shows the influence of the auxiliary gas flow rate Q per unit area of the nozzle tip on the quality of the weld. Figure 2 Figure 3
Claims (1)
に、ガス加熱および冷却機能を有する温度調整装置を設
けてなるレーザ溶接装置。A laser welding device in which an auxiliary gas supply system for supplying auxiliary gas into a head is provided with a temperature adjustment device having gas heating and cooling functions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196699A JPH0360890A (en) | 1989-07-31 | 1989-07-31 | Laser beam welding apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196699A JPH0360890A (en) | 1989-07-31 | 1989-07-31 | Laser beam welding apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0360890A true JPH0360890A (en) | 1991-03-15 |
Family
ID=16362117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1196699A Pending JPH0360890A (en) | 1989-07-31 | 1989-07-31 | Laser beam welding apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0360890A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100536576B1 (en) * | 1998-04-13 | 2006-03-09 | 삼성전자주식회사 | Lens cleaning device of laser repair system |
| WO2006061649A3 (en) * | 2004-12-10 | 2006-10-12 | Exitech Ltd | Positioning device with a puck with a closed gas system for creating a fluid cushion |
| US7315561B2 (en) | 2004-01-29 | 2008-01-01 | Matsushita Electric Industrial Co., Ltd. | Laser generator |
-
1989
- 1989-07-31 JP JP1196699A patent/JPH0360890A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100536576B1 (en) * | 1998-04-13 | 2006-03-09 | 삼성전자주식회사 | Lens cleaning device of laser repair system |
| US7315561B2 (en) | 2004-01-29 | 2008-01-01 | Matsushita Electric Industrial Co., Ltd. | Laser generator |
| WO2006061649A3 (en) * | 2004-12-10 | 2006-10-12 | Exitech Ltd | Positioning device with a puck with a closed gas system for creating a fluid cushion |
| US8704129B2 (en) | 2004-12-10 | 2014-04-22 | Tel Solar Ag | Positioning device |
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