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激光切割机原理

网址:www.shukongdiaokeji.com  2019-02-20  作者:admin    阅读:

激光切割机原理
Principle of Laser Cutting Machine
激光是一种光,与其他自然光一样,是由原子(分子或离子等)跃迁产生的。 但它与普通光不同是激光仅在最初极短的时间内依赖于自发辐射,此后的过程完全由激辐射决定,因此激光具有非常纯正的颜色,几乎无发散的方向性、极高的发光强度和高相干性。
Laser is a kind of light, which, like other natural light, is produced by atom (molecule or ion, etc.) transition. However, unlike ordinary light, laser depends on spontaneous emission only in the initial very www.shusongdaii.cn www.qieduanji.com.cn www.luyuanshimoju.cn www.luyanshimoju.org.cn www.suliaomoju.org.cn www.gelidunmoju.org.cnshort time, and the subsequent process is completely determined by stimulated radiation. Therefore, laser has very pure color, almost no divergence direction, extremely high luminous intensity and high coherence.
激光切割是应用激光聚焦后产生的高功率密度能量来实现的。在计算机的控制下,通过脉冲使激光器放电,从而输出受控的重复高频率的脉冲激光,形成一定频率,一定脉宽的光束,该脉冲激光束经过光路传导及反射并通过聚焦透镜组聚焦在加工物体的表面上,形成一个个细微的、高能量密度光斑,焦斑位于待加工面附近,以瞬间高温熔化或气化被加工材料。每一个高能量的激光脉冲瞬间就把物体表面溅射出一个细小的孔,在计算机控制下,激光加工头与被加工材料按预先绘好的图形进行连续相对运动打点,这样就会把物体加工成想要的形状。
Laser cutting is realized by using high power density energy produced by laser focusing. Under the control of computer, the laser is discharged by pulse, and the controlled repetitive high frequency pulsed laser is output to form a beam with a certain frequency and pulse width. The pulsed laser beam is transmitted and reflected through the optical path and focused on the surface of the processed object through the focusing lens group, forming a fine, high energy density spot near the surface to be processed. The material is processed by instantaneous melting or gasification at high temperature. Every high-energy laser pulse instantaneously splashes a small hole on the surface of the object. Under the control of computer, the laser processing head and the processed material move continuously and relative to each other according to the pre-drawn figure, so that the object can be processed into the desired shape.
切缝时的工艺参数(切割速度,激光器功率,气体压力等)及运动轨迹均由数控系统控制,割缝处的熔渣被一定压力的辅助气体吹除。
The process parameters (cutting speed, laser power, gas pressure, etc.) and trajectory of slit cutting are controlled by numerical control system. The slag at the slit is blown away by auxiliary gas under certain pressure.

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