Burr is a common phenomenon in laser cutting process. It is shown that various irregular metal parts, such as sharp corners and edges, are present at the surface transition of the workpiece. However, the common does not mean that the burr can be sustained. It directly affects the dimensional accuracy, shape and position accuracy and surface roughness of the workpiece, reduces the output and quality, and brings many problems to the follow-up inspection, assembly, application performance and aesthetics. Therefore, the burr should be prevented as far as possible.

　　激光切割产生毛刺一定是切割机质量问题吗？

　　Does the burr produced by laser cutting have to be the quality problem of the cutting machine?

　　很多企业在运用激光切割机停止切割时，发现切割出来的工件毛刺很多，质量十分不理想，于是就疑心这台切割机的质量存在问题。真的是这个缘由吗?其实并不一定。大多数状况下，毛刺的产生不是由于激光切割机自身存在质量问题，而是由于操作人员错误的操作方式或者切割机的颐养、维护不到位形成的。

　　When many enterprises stop cutting with laser cutting machine, they find that there are many burrs in the cutting workpiece, and the quality is not ideal, so they suspect that the quality of this cutting machine exists problems. Is that really the reason? It's not necessarily true. In most cases, the burr is not caused by the quality problems of the laser cutting machine itself, but by the wrong operation mode of the operator or the inadequate maintenance of the cutting machine.

　　另外，还有一个产生毛刺的主要缘由，那就是辅助气体问题。在停止激光切割时，激光束映照到工件外表产生极高的温度，使工件外表疾速汽化并且蒸发掉，从而完成切割金属的目的。而辅助气体的作用就是当工件经过激光束映照气化后，用来吹掉工件外表残留的熔渣。假如不这样做的话，等到熔渣冷却，就会在工件切割面上构成一层附着的毛刺。

　　In addition, there is another major cause of burrs, that is, the auxiliary gas problem. When the laser cutting is stopped, the laser beam reflects on the surface of the workpiece to produce extremely high temperature, which makes the surface of the workpiece rapidly vaporize and evaporate, thus completing the purpose of cutting metal. The function of auxiliary gas is to blow off the residual slag on the surface of the workpiece when the workpiece is gasified by laser beam mapping. If not, when the slag is cooled, an adherent burr will be formed on the cutting surface of the workpiece.

　　下面，我们就来总结一下，几种常见的毛刺产生缘由，及其相应的处理办法，协助读者远离激光切割毛刺的搅扰。

　　Next, we will summarize the causes of several common burrs and the corresponding treatment methods to help readers stay away from the disturbance of laser cutting burrs.

　　激光切割产生毛刺的常见缘由及处理办法：

　　Common causes and treatment of burrs in laser cutting:

　　缘由一：激光切割机产生激光束焦点的上下位置呈现偏向，招致能量没有恰恰会聚到工件上，工件没有被充沛汽化，使熔渣产生量增加，不容易吹掉，从而更容易产生毛刺。

　　Cause: Laser cutting machine produces laser beam focus of the upper and lower position is biased, resulting in energy does not exactly converge on the workpiece, the workpiece is not fully vaporized, so that slag production increased, not easy to blow off, thus easier to produce burrs.

　　处理办法：对激光束焦点的位置停止调整，依据其产生的偏移位置，调整到佳状态。

　　Processing method: Stop adjusting the position of the focus of laser beam and adjust it to the best state according to the offset position it produces.

　　缘由二：激光切割机的输出功率不够，没能汽化金属，从而产生过多的熔渣和毛刺。处理办法：对激光切割机的工作能否正常状况停止检查，假如不正常的话，需求及时修理维护;假如正常的话，还要检查输出数值能否正确。

　　The second reason is that the output power of laser cutting machine is not enough to vaporize metal effectively, resulting in excessive slag and burrs. Solution: To check whether the laser cutting machine can work normally or not, if it is abnormal, it needs to be repaired and maintained in time; if it is normal, it also needs to check whether the output value is correct.

　　缘由三：激光切割机的切割线速渡过于迟缓，毁坏了切割面的外表质量，产生毛刺。

　　Reason 3: The cutting speed of laser cutting machine is too slow, which destroys the surface quality of cutting surface and produces burrs.

　　处理办法：及时调整并进步切割线速度，使其到达正常的值。

　　Processing method: timely adjust and improve the cutting line speed, so that it reaches the normal value.

　　缘由四：激光切割机的辅助气体纯度达不到请求的规范，也会使工件产生毛刺。

　　Cause 4: The assistant gas purity of laser cutting machine can not meet the required specifications, and it will also cause burrs on the workpiece.

　　处理办法：改换纯度更高的辅助气体。

　　Solution: Replace the auxiliary gas with higher purity.

　　缘由五：激光切割机工作的时间过长，使设备呈现了不稳定的工作状态，这样也会招致毛刺的产生。

　　Reason 5: Laser cutting machine work too long, so that the equipment presents an unstable working state, which will also lead to burrs.

　　处理办法：关闭激光切割机，过一段时间再重新启并动，使其得到充沛的休息。

　　Solution: Turn off the laser cutting machine and restart it after a period of time, so that it can get plenty of rest.