如何进行正确的焊接加工?
发布日期:2017-02-20 14:26:19

激光焊接加工精度高,生产速度快,表面光洁度好,外形美观大方。因此被更多的应用到眼镜、五金电子、首饰、卫浴厨具等精密焊接行业。 

  其加工流程是将具有优异的方向性、高亮度、高强度、高单色性、高相干性等特点的激光束辐射至加工工件表面区域内,激光束经过光学系统聚焦后,其激光焦点的功率密度为104-107W/cm2,通过激光与被焊物的相互作用,在极短的时间内使被焊处形成一个能高度集中的热源区,热能使被焊物区域熔化后冷却结晶形成牢固的焊点和焊缝。 

  根据所用激光器及其工作方式的不同,常用的焊接方式有两种,一种是脉冲激光焊,主要用于单点固定连续和簿件材料的焊接,焊接时形成一个个圆形焊点;另一种为连续激光焊,主要用于大厚件的焊接和切割,焊接过程中形成一条连续焊缝。 

  在焊接过程中,光束焦点位置是最关键的控制工艺参数之一,在一定激光功率和焊接速度下,只有焦点处于最佳位置范围内才能获得最大熔深和好的焊缝形状。 

  采用激光焊接加工具有以下优点:1)激光束具有极高的功率密度,导致焊接速度快,变形小,可焊接钛、石英等难以焊接的材料;2)光束易于传输和控制,无需更换焊炬、喷嘴等,减少停机时间,提高了生产效率。3)冷却速度快,焊缝强度高,综合性能好。

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