News
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【Rayclass | 锐课堂】Laser Welding
Date:2019-11-22Source:Original article

激光焊接以高能量密度的激光束为热源进行高效精密焊接,由于激光焊接对工件预加工精度要求较高,要求光束在工件上的位置不能明显偏移,若工件装配精度或光束定位精度达不到要求,容易造成焊接缺陷,使激光焊接的工艺能力在一定程度上受到限制。这是由于激光聚焦后光斑尺寸小,焊缝窄。

Laser welding uses a high energy density laser beam as a heat source for efficient precision welding. Since laser welding requires high precision for workpiece pre-machining, the position of the beam on the workpiece is not significantly offset. If the assembly accuracy or beam positioning accuracy of the workpiece does not meet the requirements, it is easy to cause welding defects, which limits the process capability of laser welding to a certain extent. This is because the spot size is small and the weld is narrow after laser focusing.

 

针对以上激光焊接技术存在的局限性,市场逐步推出了一种双楔形激光振动的激光焊接方法,通过在焊接头上配置特制的wobble振动模块实现。wobble焊接技术的应用能够使得激光焊接应用更加广泛,对更大工件,焊缝更宽的工件都能实现激光高效精密焊接。

In response to the limitations of the above laser welding technology, the market has gradually introduced a laser welding method with double wedge laser vibration, which is realized by disposing a special wobble vibration module on the welding head. The application of wobble welding technology can make laser welding more widely used, and it can achieve high-efficiency laser precision welding for larger or wider welds workpieces.

 wobble手持焊接头

Wobble Hand-held Welding Head

 

两种传统振动焊接

Two Traditional Vibration Welding

 

相对于前两种振动焊接模式,双楔形镜旋转振动焊接通过安装于准直镜和聚焦镜之间的振动模块,使聚焦光斑在焊接头移动的情况下产生螺旋线式的焊缝。当聚焦焦距相同时,扭转角度越大,则振动幅度越大;扭转角度相同时,聚焦焦距越大,则振动幅度越大。双楔形振动焊接可以使焊缝加宽,同时获得更好的焊缝成形性。

Compared to the first two vibration welding modes, the double wedge mirror rotational vibration welding produces a spiral weld seam by the vibration module mounted between the collimating mirror and the focusing mirror, so that the focusing spot moves while the welding head moves. When the focal length is the same, the larger the torsion angle is, the larger the vibration amplitude is. When the torsion angle is the same, the larger the focal length, the larger the vibration amplitude. Therefore, double wedge vibration welding allows the weld joint to be widened while achieving better weld formability.

 

 

 

手持激光焊技术优势

Advantages of Hand-held

Laser Welding Technology

 

 

传统的激光振动焊接,准直光束通过单轴振镜振动,经过聚焦镜聚焦的光斑又与焊接头配合相对于工件移动,形成具有一定振幅、频率和偏移量的焊缝。

In conventional laser vibration welding, the collimated beam is vibrated by a uniaxial galvanometer, and the spot focused by the focusing mirror is moved with the welding head to move relative to the workpiece to form a weld having a certain amplitude, frequency and offset.

 

 

手持激光焊 VS 传统电焊

Hand-held Welding

VS

Traditional Electric Welding

 

手持激光焊相对传统焊接及激光焊的优势体现在哪些方面?我们通过下表了解:

What are the advantages of hand-held laser welding over traditional welding and laser welding?

 

对比项目

传统

焊接

激光焊

手持

激光焊

对工件的热输入

非常高

工件的变形、咬边

与母材的结合强度

一般

非常好

后续处理

打磨

无需打磨

或很少打磨

无需打磨

或很少打磨

焊接速度

一般

氩弧焊的

2倍以上

氩弧焊的

2倍以上

适用材料

不锈钢、碳钢、镀锌板

不锈钢、碳钢、镀锌板

不锈钢、碳钢、镀锌板

耗材

耗材多

耗材少

耗材少

操作难度

复杂

一般

简单

操作者的安全性

不安全

安全

安全

环境保护影响

不环保

环保

环保

焊接容错性

不好

摆动焊接

光斑宽度可调

有安全

焊接质量对比

很好

 

PROGRAM

TRADITIONAL WELDING

LASER WELDING

HAND-HELD WELDING

Heat Input

High

Low

Low

Deformation, Undercut

Series

Slight

Slight

Bond

Strength

Normal

Good

Excellent

Follow-up

Program

Polishing

Hardly

Ever

Hardly Ever

Speed

Ordinary 

More than 2

times argon

arc welding

More than 2

times argon

arc welding

Applicable

Material

Stainless Steel, Carbon Steel, Galvanized Sheet

Stainless Steel, Carbon Steel, Galvanized Sheet

Stainless Steel, Carbon Steel, Galvanized Sheet

Consumables

More

Less

Less

Operation

Difficulty

Difficult

Normal

Easy

Operator

Safety

Unsafe

Safe

Safe

Environmental Protection

Un-environment

Environment

Environment

Welding Fault Tolerance

High

Low

High

Swing

Welding

Can’t

Can’t

Can

Spot Width

Unable

Unable

Adjustable

Welding

Quality

Less

Normal

Excellent

 

锐科激光根据焊接行业的发展态势,研发出适合手持激光焊应用的新一代1000W焊接版连续光纤激光器,更多手持激光焊相关应用案例,敬请下期。

According to the development trend of the welding industry, Raycus has developed a new generation of 1000W Hand-held fiber laser for welding. Let’s meet in the next issue for more applications related to hand-held welding.

 

 

 

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