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Terminology and application of laser welding machine


科技有限公司初步整理的一些焊接用语进行说明 . Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. In practice, many proper terms are difficult for customers to understand. Some welding terms are used for illustration .

Common laser welding terms:

聚焦光斑: 1. Focusing light spot:

= 聚焦镜焦距 / 准直镜焦距 * 激光器光纤芯径 Focusing spot size = focus lens focal length / collimator lens focal length * laser fiber core diameter

功率密度: 2. Power density:

= 峰值功率 / 光斑面积 Power density = peak power / spot area

= 单脉冲能量 / 脉宽 Peak power = single pulse energy / pulse width

= 单脉冲能量 * 频率 Average power = single pulse energy * frequency

激光脉冲波形: 3. Laser pulse waveform:

较高的反射,且反射率会随着表面温度的变化在一个激光冒充左右期间内金属反射变化很大,可根据这一特性对应设置脉冲波形。 One of the process parameters that the pulse waveform affects the welding quality is more important for thin plate welding; the metal surface has a high reflection of the laser , and the reflectivity will change with the surface temperature during a period of laser impersonation. Large, the pulse waveform can be set according to this characteristic.

激光脉冲宽度:脉冲知道是将激光器连续输出的能量集中到一个小的脉冲里面输出,脉宽至的是输出时间的长短。 4. Laser pulse width: The pulse knows that the energy continuously output by the laser is concentrated into a small pulse for output, and the pulse width is the length of the output time.

离焦量对焊接质量的影响: 5. Influence of defocus amount on welding quality:

Laser welding usually requires a certain amount of defocus, because the power density at the laser focus is too high, it is easy to evaporate into holes, and the power density distribution on the defocus plane is relatively uniform.

There are two types of defocus: positive defocus and negative defocus. The focal plane is above the workpiece for positive defocus, otherwise it is negative defocus. According to geometrical optics theory: when the positive and negative defocus are equal, the power density on the plane Approximately the same, but in fact the shape of the molten pool obtained by the lock is different. A larger molten pool can be obtained when negative defocusing. This is related to the process of forming the molten pool. The laser heating material starts to melt and form a depression in the center of the molten pool. At the time of coke, the internal power density of the material is higher than the surface, and it is easy to form the melting and vaporization of the atmosphere, so that the light energy is transmitted deeper into the material. Therefore, in actual applications, deeper penetration is required. Out of focus.

焊接速度: 6. Welding speed:

When the power is constant, the weld pool is almost inversely proportional to the welding speed. The welding speed is too fast, the gas is too late to escape, the gas is easily generated in the weld, and the penetration depth is shallow. Welding speed is too slow. The production efficiency is low. The affected area is often brittle and fractured due to coarse overheated grains, and workpiece deformation is also large.

进行精准熟练的应用除了要熟悉设备本身和焊接产品有一点的了解,更多的是在日常使用过程中多尝试多应用,摸索出一套经验,这样就能更加得心应手的使用好激光设备,更多有用的激光焊接、切割信息请参考 http://xczlsj.com . In summary, in order to use the laser welding machine accurately and proficiently, in addition to having a little understanding of the equipment itself and the welding products, it is more to try more applications and find out a set of experience in the daily use process. You can use the laser equipment more conveniently. For more useful laser welding and cutting information, please refer to http: //xczlsj.com .

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