JP5278883B2 - Laser spot welding method - Google Patents
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- JP5278883B2 JP5278883B2 JP2011196008A JP2011196008A JP5278883B2 JP 5278883 B2 JP5278883 B2 JP 5278883B2 JP 2011196008 A JP2011196008 A JP 2011196008A JP 2011196008 A JP2011196008 A JP 2011196008A JP 5278883 B2 JP5278883 B2 JP 5278883B2
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- 238000003466 welding Methods 0.000 title claims description 65
- 238000000034 method Methods 0.000 title claims description 16
- 238000007789 sealing Methods 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 20
- 239000007769 metal material Substances 0.000 description 6
- 239000003517 fume Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003796 beauty Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Description
本発明は金属材料のレーザスポット溶接方法に係り、特に金属材料を２枚重ねて、スポット状の溶接部を形成し、かつ金属材料表面の美麗さを維持するレーザスポット溶接方法に関する。 The present invention relates to a laser spot welding method for a metal material, and more particularly to a laser spot welding method for stacking two metal materials to form a spot-like welded portion and maintaining the beauty of the surface of the metal material.
従来から、各種金属材料の板の結合には２枚の被溶接物を重ねて、上下電極で挟み、加圧、通電して溶接する抵抗溶接が用いられてきた。しかし、抵抗溶接での溶接部は溶接時の熱容量が大きいためなどで溶接痕が付き、更に溶接裏面の材料の表面が変色するなど美観上の難点がある。そこで、材料の表面を美麗に保持できる溶接方法としてレーザ溶接での結合が多く活用されている。 Conventionally, resistance welding, in which two workpieces are stacked, sandwiched between upper and lower electrodes, and welded by pressurization and energization, has been used for joining plates of various metal materials. However, the welded portion in resistance welding has aesthetic difficulties such as a welding mark due to a large heat capacity during welding, and further, the surface of the material on the back of the weld is discolored. Accordingly, laser welding is often used as a welding method that can maintain the surface of a material beautifully.
しかし、レーザ溶接でのスポット状の溶接、つまり溶接各打点の１点での強度は、レーザ溶接の特性上から抵抗溶接の１打点に比較し、著しく低い。たとえば、板厚０．８ｍｍの圧延鋼板の抵抗溶接の１打点での引張せん断強度はＪＩＳで定めたＡ級では３ｋＮ程度である。このときの溶着部の径すなわちナゲットの径は約４．５ｍｍである。これに対し、レーザ溶接でのスポット１打点でのナゲット径は１ｍｍ以下であり、溶接強度は抵抗溶接の１／１０にも満たない。 However, the spot-like welding in laser welding, that is, the strength at one point of each welding spot is remarkably lower than the one spot of resistance welding because of the characteristics of laser welding. For example, the tensile shear strength at one point of resistance welding of a rolled steel plate having a thickness of 0.8 mm is about 3 kN in class A defined by JIS. At this time, the diameter of the welded portion, that is, the diameter of the nugget is about 4.5 mm. In contrast, the nugget diameter at one spot in laser welding is 1 mm or less, and the welding strength is less than 1/10 of resistance welding.
そこで、レーザ溶接でのスポット打点では、一般的に小面積部に複数個の溶着部つまり複数個のナゲットを生成し溶接強度を確保する手段が用いられている。（特許文献１、２参照） Therefore, in spot spotting in laser welding, generally, means for generating a plurality of welded portions, that is, a plurality of nuggets in a small area portion to ensure welding strength is used. (See Patent Documents 1 and 2)
先に本願の発明者等は特許文献３でレーザ光照射ノズルを被溶接物に押圧してシールドガスをレーザ光照射ノズル内に封鎖し、溶接時に発生するヒュームや溶融ガスをシールドガスと同時に排出することなどで、被溶接物の表面を美麗のまま保持でき、作業上も安全な金属材料のレーザスポット溶接方法を提案してきた。 In the patent document 3, the inventors of the present application previously pressed the laser beam irradiation nozzle against the work piece to seal the shield gas in the laser beam irradiation nozzle, and discharged fumes and molten gas generated during welding simultaneously with the shield gas. By doing so, a laser spot welding method for metal materials has been proposed that can keep the surface of the workpiece to be beautiful and safe in operation.
しかし、前述したように小面積部に多数のナゲットがあれば溶接強度を確保できるが、少数個のレーザスポット打点数では必要な溶接強度を確保できない。そこで、多数のレーザスポット打点のナゲットを簡便な装置で、如何に速く形成するかが課題である。特許文献３を更に進展させ、溶接強度も確保でき、かつ材料表面の美麗さも維持できるレーザスポット溶接方法を本発明にて提案する。 However, as described above, welding strength can be ensured if there are a large number of nuggets in a small area, but the necessary welding strength cannot be ensured with a small number of laser spot hits. Therefore, how to quickly form a nugget of a large number of laser spot hit points with a simple apparatus is a problem. The present invention proposes a laser spot welding method that further advances Patent Document 3, can ensure welding strength, and can maintain the beauty of the material surface.
本発明はレーザ溶接の欠点である溶接スポット１打点当たりの溶接強度が低いための解消策である多点溶接を簡便な装置で短時間に効率よく溶接作業が可能である安全で、高品質のレーザ溶接方法を提案する。 The present invention is a safe and high quality that enables efficient welding work in a short time with a simple device for multi-point welding, which is a solution for the low welding strength per welding spot, which is a drawback of laser welding. A laser welding method is proposed.
本発明は次の構成により上記課題を解決する。
＜構成１＞
２枚の被溶接物を載置した板状基台の上部を移動するノズルホルダの先端部に保持されたレーザ光照射ノズルのハウジングの上部にレーザ光照射ユニットを配置し、前記レーザ光照射ノズルが前記被溶接物に押圧し固定した状態で、前記レーザ光照射ユニットは2つの偏心軸の回転で揺動する揺動板の作動で円弧状に揺動し、１回の揺動で前記レーザ光照射ユニットから複数回、照射されたレーザ光は円弧状に複数個のナゲットを形成することを特徴とする金属板のレーザスポット溶接方法。
The present invention solves the above problems by the following configuration.
<Configuration 1>
A laser light irradiation unit is disposed above the housing of a laser light irradiation nozzle held at the tip of a nozzle holder that moves above the plate-like base on which two workpieces are placed, and the laser light irradiation nozzle Is pressed and fixed to the workpiece, the laser beam irradiation unit swings in an arc shape by the operation of a swinging plate that swings by the rotation of two eccentric shafts, and the laser beam is rotated by one swing. A laser spot welding method for a metal plate, characterized in that a plurality of nuggets are formed in an arc shape by laser light irradiated a plurality of times from the light irradiation unit.
＜構成２＞
前記レーザ光照射ユニットを前記板状基台の面に対し直角から任意の角度だけ傾斜させ、前記レーザ光照射ノズルの前記ハウジングも同じく直角から任意の角度だけ傾斜したことを特徴とする構成１記載のレーザスポット溶接方法。
<Configuration 2>
The laser light irradiation unit is inclined at an arbitrary angle from a right angle with respect to the surface of the plate-like base, and the housing of the laser light irradiation nozzle is also inclined at an arbitrary angle from the same right angle. Laser spot welding method.
＜構成３＞
前記レーザ光照射ノズルの封鎖部材を被溶接物に押圧し、封鎖ガス室を形成し、前記封鎖ガス室内に噴出孔から封鎖ガスを注入し、封鎖ガスを充満させ、レーザ光照射による溶着部を形成後、前記レーザ光照射ノズルの前記ハウジングの先端近傍の排出孔から封鎖ガス、溶融ガス、およびヒュームを排出することを特徴とする構成１記載のレーザスポット溶接方法。
<Configuration 3>
The sealing member of the laser light irradiation nozzle is pressed against the workpiece , a sealing gas chamber is formed, a sealing gas is injected from the ejection hole into the sealing gas chamber, the sealing gas is filled, and a welded portion by laser light irradiation is formed. 2. The laser spot welding method according to Configuration 1, wherein after the formation, a sealing gas, a molten gas, and a fume are discharged from a discharge hole near the tip of the housing of the laser light irradiation nozzle.
＜構成４＞
前記レーザ光照射ノズル内の圧力変化を検知してレーザビームの漏れを検出することを特徴とする構成１記載のレーザスポット溶接方法。
<Configuration 4>
The laser spot welding method according to Configuration 1, wherein a laser beam leakage is detected by detecting a pressure change in the laser light irradiation nozzle.
本発明はレーザ溶接の欠点である溶接スポット１打点当たりの溶接強度が低いための解消策である多点溶接を簡便な装置で短時間に効率よく溶接作業が可能で、材料表面の美麗さを保持しつつ、危険性がなく安全で、高品質のレーザ溶接が確保できる。 In the present invention, multi-point welding, which is a solution for the low welding strength per welding spot, which is a drawback of laser welding, can be efficiently performed in a short time with a simple device, and the surface of the material is beautiful. While holding, it is safe without risk and can ensure high quality laser welding.
図１〜図８は本発明に係るレーザ溶接機（２０）の説明図である。 FIGS. 1-8 is explanatory drawing of the laser welding machine (20) based on this invention.
添付する図を用いて実施例を説明すると、次のとおりである。 The embodiment will be described with reference to the accompanying drawings.
本発明の実施例１を図１に示す。
本発明では、作業者の１回の操作で図５に示すような複数個のナゲットを形成する溶接方法であり、これに関連する内容を以下に説明する。
A first embodiment of the present invention is shown in FIG.
The present invention is a welding method for forming a plurality of nuggets as shown in FIG. 5 by one operation of an operator, and the contents relating to this will be described below.
最初に本発明の溶接方法を実施する装置であるレーザ溶接機（２０）の基本的な構成を説明する。 First, a basic configuration of a laser welding machine (20), which is an apparatus for performing the welding method of the present invention, will be described.
レーザ光照射ユニット（１４）を装備したレーザ光照射ノズル（１）はノズルホルダ（２）の先端部に保持される。このレーザ光照射ノズル（１）のハウジンング（１２）の内部でレーザ光照射ユニット（１４）からレーザ光が照射され、レーザ溶接が実施される。レーザ光照射ノズル（１）とその上部に配置されたレーザ光照射ユニット（１４）は被溶接物（Ｗ）を載置する板状基台（５）の面に対し、レーザ光照射ユニットを前記板状基台の面に対し直角から任意の角度だけ傾斜させている。つまり、板状基台（５）の面に対し、レーザ光が直角から任意の角度だけ傾斜している。レーザ光照射ユニット（１４）は図２、図３に示すように、レーザ光照射ノズル（１）とは分離していて、焦点調整機構（１８）を介して揺動板（１５）に結合されており、揺動機構（４）の二つの偏心軸（１６）の回転で揺動する揺動板（１５）と共に円弧状に、揺動する。偏心軸（１６）は配備した駆動モータ（１７）とアイドルギヤにより同期して同じ方向に回転するよう構成している。また、封鎖部材（１１）で被溶接物（Ｗ）を押圧して封鎖ガス室（７）を形成し、レーザ光照射ノズル（１）内に噴出孔（１２１）から噴射された封鎖ガスを封入し、溶接後に封鎖ガス、溶融ガスやヒュームを排出孔（１２２）から排出するのは特許文献３と同様である。実施例では、焦点調整機構（１８）として、レーザ光の焦点を調整するため、レーザ光照射ユニット（１４）がツマミネジで上下に摺動する方式を取り入れている。 The laser light irradiation nozzle (1) equipped with the laser light irradiation unit (14) is held at the tip of the nozzle holder (2). Laser light is irradiated from the laser light irradiation unit (14) inside the housing (12) of the laser light irradiation nozzle (1), and laser welding is performed. The laser light irradiation nozzle (1) and the laser light irradiation unit (14) disposed above the laser light irradiation nozzle are disposed on the surface of the plate-like base (5) on which the workpiece (W) is placed. It is inclined at an arbitrary angle from a right angle with respect to the surface of the plate-like base. That is, the laser beam is inclined from the right angle by an arbitrary angle with respect to the surface of the plate-like base (5). As shown in FIGS. 2 and 3, the laser beam irradiation unit (14) is separated from the laser beam irradiation nozzle (1), and is coupled to the swing plate (15) via the focus adjustment mechanism (18). and which, oscillating plate to swing by the rotation of two eccentric shafts (16) with (15) an arcuate swing mechanism (4) swings. The eccentric shaft (16) is configured to rotate in the same direction in synchronization with the provided drive motor (17) and the idle gear. Further, the object to be welded (W) is pressed by the sealing member (11) to form the sealing gas chamber (7), and the sealing gas injected from the ejection hole (121) is enclosed in the laser light irradiation nozzle (1). Then, the sealing gas, the molten gas and the fumes are discharged from the discharge hole (122) after the welding as in the case of Patent Document 3. In the embodiment, the focus adjustment mechanism (18) adopts a method in which the laser light irradiation unit (14) slides up and down with a knob screw in order to adjust the focus of the laser light.
次に、添付する図を用いてレーザスポット溶接の動作を説明する。 Next, the operation of laser spot welding will be described with reference to the accompanying drawings.
最初に、作業者は図１の取っ手（１９）を操作し、ノズルホルダ（２）を溶接個所に移動し、レーザ光照射ノズル（１）を２枚重ねした金属材料板の被溶接物（Ｗ）に押付ける。 First, the operator operates the handle (19) of FIG. 1, moves the nozzle holder (2) to a welding location, and welds a metal material plate (W) with two laser light irradiation nozzles (1) stacked. ).
溶接スイッチの作動で封鎖ガスが注入され、また、ノズルホルダ（２）の上部にある加圧シリンダ（８）の作動でレーザ光照射ノズル（１）が被溶接物（Ｗ）を加圧し、封鎖ガスの密閉で十分なシールド状態が保持され、レーザ光照射ユニット（１４）から、レーザ光が照射される。このとき、駆動モータ（１７）が回転作動し、２つの偏心軸（１６）が同期して同方向に回転する。すると、揺動板（１５）も同時に揺動して、揺動板（１５）と結合したレーザ光照射ユニット（１４）も、揺動し円弧運動する。この揺動機構（４）の１回の、揺動で複数回のレーザ光が照射され、図５（ａ）、（ｂ）のように予め設定された複数個のスポット打点のナゲットが生成される。図６はレーザ光照射の１打点目と２打点目のレーザ光の位置の相違の構造を示している。このときの偏心軸（１６）と揺動板（１５）の位置の間隙をＨ１、Ｈ２として図７のＡ１、Ａ２に拡大して示している。このＨ１、Ｈ２の寸法の違いにより揺動板（１５）の位置が変動する。駆動モータ（１７）の軸心に近いＨ１より離れているＨ２のときの溶接打点位置は図６（ｂ）に示すように被溶接物（Ｗ）の折り曲げに近い位置となる。このように、レーザ光照射の打点位置が異なる複数個のスポット打点のナゲットが生成される。この揺動機構（４）によりレーザ光照射ユニット（１４）は、レーザ光照射ノズル（１）が被溶接物（Ｗ）に押圧し固定した状態で、板状基台（５）に平行に揺動し、レーザ光の焦点距離を一定に保ったままで連続的に複数個のナゲットを形成できる。
また、この揺動機構（４）での更なる利点は、レーザ光照射ユニット（１４）の単純な回転の時に発生するファイバーケーブル（３）のからまりはこの揺動機構（４）では発生しないことである。
次に、溶接後、レーザ光照射ノズル（１）内では溶接後の封鎖ガス、溶融ガスやヒュームをハウジング（１２）の先端近傍の排出孔（１２２）から排出する。
The sealing gas is injected by the operation of the welding switch, and the laser beam irradiation nozzle (1) pressurizes the workpiece (W) by the operation of the pressurizing cylinder (8) at the upper part of the nozzle holder (2). A sufficient shielding state is maintained by gas sealing, and laser light is emitted from the laser light irradiation unit (14). At this time, the drive motor (17) rotates and the two eccentric shafts (16) rotate in the same direction in synchronization. Then, the rocking plate (15) also swings simultaneously, the laser beam irradiation unit (14) combined with the rocking plate (15) also moves along a circular arc swing. Once the swing mechanism (4), a plurality of times of the laser beam is irradiated in the swing, FIG. 5 (a), the generated is preset plurality of spots RBI nuggets as (b) The FIG. 6 shows the structure of the difference in the positions of the first and second laser light irradiation laser beams. At this time, the gaps between the positions of the eccentric shaft (16) and the swing plate (15) are shown as H1 and H2 in an enlarged manner in A1 and A2 of FIG. The position of the swing plate (15) varies due to the difference in dimensions between H1 and H2. As shown in FIG. 6B, the welding spot position at H2 which is far from H1 close to the axis of the drive motor (17) is close to the bending of the work piece (W). Thus, a plurality of spots RBI nuggets strike position of the laser beam irradiation that Do different is generated. With this swinging mechanism (4), the laser beam irradiation unit (14) swings in parallel with the plate-like base (5) in a state where the laser beam irradiation nozzle (1) is pressed and fixed to the workpiece (W). A plurality of nuggets can be formed continuously while keeping the focal length of the laser light constant.
Further, a further advantage of the swing mechanism (4) is that the tangling of the fiber cable (3) that occurs when the laser light irradiation unit (14) is simply rotated does not occur in the swing mechanism (4). That is.
Next, after welding, in the laser beam irradiation nozzle (1), the sealing gas, molten gas and fume after welding are discharged from the discharge hole (122) near the tip of the housing (12).
レーザ光照射ノズル（１）とその上部に配置されたレーザ光照射ユニット（１４）は図３に示すように被溶接物（Ｗ）を載置する板状基台（５）の面に対し、レーザ光が直角か、または、任意の角度だけ傾斜している。任意の角度だけ傾斜させる目的は、レーザ光の直接の反射を防止すると共に溶接ナゲット径を拡大し、溶接強度を増強している。また、図３のような折曲げのある被溶接物（Ｗ）の曲げ元に極力接近することを可能にしている。図１、図３ではこの傾斜角を１５度に設定した事例である。 The laser light irradiation nozzle (1) and the laser light irradiation unit (14) arranged on the upper part thereof are arranged on the surface of the plate base (5) on which the workpiece (W) is placed as shown in FIG. The laser beam is at a right angle or inclined at an arbitrary angle. The purpose of inclining by an arbitrary angle is to prevent direct reflection of the laser beam and enlarge the weld nugget diameter to enhance the welding strength. In addition, it is possible to approach as close as possible to the bending source of the workpiece (W) that is bent as shown in FIG. 1 and 3 show an example in which the inclination angle is set to 15 degrees.
レーザ光は直接目に当たると非常に危険である。そのため、本発明ではレーザ光照射ノズル（１）を被溶接物（Ｗ）に押圧し、封鎖ガス室（７）を形成し、更に、封鎖ガス室（７）内の圧力変化を検知し、レーザビームのレーザ光照射ノズル（１）外部への漏洩を防止している。これは、特許文献３と同様である。また、上部からのレーザ光の漏洩を防止するため図１の二点鎖線で示すレーザ光遮断カバー（６）を取り付けている。 Laser light is very dangerous if it hits the eyes directly. Therefore, in the present invention, the laser beam irradiation nozzle (1) is pressed against the workpiece (W) to form the sealed gas chamber (7), and further, the pressure change in the sealed gas chamber (7) is detected, and the laser Laser beam irradiation nozzle (1) prevents leakage to the outside. This is the same as in Patent Document 3. Further, a laser light blocking cover (6) indicated by a two-dot chain line in FIG.
次に、作業者はノズルホルダ（２）を次の溶接個所に移動し、連続してレーザ溶接を実施し、完了する。図８はレーザ溶接の一連の動作を示すフローチャート図である。また、実施例1では作業者がノズルホルダ（２）を手動で操作する方式としたが、数値制御による自動化装置にすることは当然ながら、可能である。 Next, an operator moves a nozzle holder (2) to the next welding location, and performs laser welding continuously, and is completed. FIG. 8 is a flowchart showing a series of operations of laser welding. In the first embodiment, the operator manually operates the nozzle holder (2). However, it is naturally possible to use an automatic device by numerical control.
従来のレーザスポット溶接に対し、偏心軸など簡単な揺動機構の追加で、多点溶接を簡便に実施でき、外観の美麗さを保持しつつ、溶接強度の得られる安全で高品質のレーザスポット溶接に適用できる。 Compared to conventional laser spot welding, a simple rocking mechanism such as an eccentric shaft can be added to easily perform multi-point welding, maintaining a beautiful appearance and ensuring a safe and high-quality laser spot. Applicable to welding.
１ レーザ光照射ノズル
２ ノズルホルダ
３ ファイバーケーブル
４ 揺動機構
５ 板状基台
６ レーザ光遮断カバー
７ 封鎖ガス室
８ 加圧シリンダ
９ アーム
１１ 封鎖部材
１２ ハウジング
１４ レーザ光照射ユニット
１５ 揺動板
１６ 偏心軸
１７ 駆動モータ
１８ レーザ光焦点調整機構
１９ 取っ手
２０ レーザ溶接機
１２１ 噴出孔
１２２ 排出孔
Ｗ 被溶接物
DESCRIPTION OF SYMBOLS 1 Laser beam irradiation nozzle 2 Nozzle holder 3 Fiber cable 4 Oscillating mechanism 5 Plate-shaped base 6 Laser light blocking cover 7 Sealing gas chamber 8 Pressure cylinder
9 Arm 11 Sealing member 12 Housing 14 Laser light irradiation unit 15 Oscillating plate 16 Eccentric shaft 17 Drive motor 18 Laser light focus adjusting mechanism 19 Handle 20 Laser welder 121 Ejection hole 122 Discharge hole W Workpiece
Claims (1)
前記レーザ光照射ユニットを前記板状基台の面に対し直角から任意の角度だけ傾斜させ、前記レーザ光照射ノズルの前記ハウジングも同じく直角から任意の角度だけ傾斜し、
前記レーザ光照射ノズルの封鎖部材を前記被溶接物に押圧し、封鎖ガス室を形成し、前記封鎖ガス室内に噴出孔から封鎖ガスを注入し、封鎖ガスを充満させた後、
前記レーザ光照射ノズルが前記被溶接物に押圧し固定した状態で、
前記レーザ光照射ユニットは2つの偏心軸の回転で揺動する揺動板の作動で円弧状に揺動し、１回の揺動で前記レーザ光照射ユニットから複数回、照射されたレーザ光は円弧状に複数個のナゲットを形成することを特徴とする金属板のレーザスポット溶接方法。 A laser light irradiation unit is disposed on the upper part of the housing of the laser light irradiation nozzle held at the tip of the nozzle holder that moves the upper part of the plate-like base on which the workpiece is placed,
The laser light irradiation unit is inclined at an arbitrary angle from a right angle with respect to the surface of the plate-shaped base, and the housing of the laser light irradiation nozzle is also inclined at an arbitrary angle from the right angle,
After pressing the sealing member of the laser light irradiation nozzle against the workpiece, forming a sealing gas chamber, injecting a sealing gas from the ejection hole into the sealing gas chamber, and filling the sealing gas,
In a state where the laser beam irradiation nozzle is pressed and fixed to the workpiece,
The laser light irradiation unit swings in an arc shape by the operation of a swinging plate that swings by rotation of two eccentric shafts, and the laser light irradiated from the laser light irradiation unit a plurality of times by one swing is A method of laser spot welding a metal plate, wherein a plurality of nuggets are formed in an arc shape.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011196008A JP5278883B2 (en) | 2011-09-08 | 2011-09-08 | Laser spot welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011196008A JP5278883B2 (en) | 2011-09-08 | 2011-09-08 | Laser spot welding method |
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| JP5278883B2 true JP5278883B2 (en) | 2013-09-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785925A (en) * | 2014-01-22 | 2015-07-22 | 上海亚尔光源有限公司 | Electrode molybdenum sheet assembly for ultrahigh-voltage point light source and forming method thereof |
| CN105618932A (en) * | 2016-03-23 | 2016-06-01 | 江苏海德威激光科技发展有限公司 | Loop wire welding head used for laser clamping spot welding |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0741417B2 (en) * | 1986-10-06 | 1995-05-10 | 株式会社安川電機 | Locus interpolator |
| JP2637524B2 (en) * | 1988-12-21 | 1997-08-06 | 株式会社アマダ | Processing head of laser processing machine |
| JP2001062575A (en) * | 1999-08-25 | 2001-03-13 | Nippon Steel Corp | Laser welding method for metallic plate, and structural body |
| JP2007253179A (en) * | 2006-03-22 | 2007-10-04 | Tokyu Car Corp | Laser beam welding method |
| JP4721019B2 (en) * | 2008-09-05 | 2011-07-13 | 株式会社向洋技研 | Laser spot welding method of metal material |
| JP2011060832A (en) * | 2009-09-07 | 2011-03-24 | Hitachi Computer Peripherals Co Ltd | Laser irradiation device having tilt control mechanism and tilt control method in laser irradiation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785925A (en) * | 2014-01-22 | 2015-07-22 | 上海亚尔光源有限公司 | Electrode molybdenum sheet assembly for ultrahigh-voltage point light source and forming method thereof |
| CN105618932A (en) * | 2016-03-23 | 2016-06-01 | 江苏海德威激光科技发展有限公司 | Loop wire welding head used for laser clamping spot welding |
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| JP2013056354A (en) | 2013-03-28 |
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