摘要
为了避免对含腔体零件内表面造成损伤以及提高加工效率,需要确定激光打孔过程中穿透材料所需脉冲个数。在对GH3536高温合金激光冲击打孔过程中,使用光电二极管对材料上表面的光信号进行检测。通过采集得到的电压信号判断材料是否被穿透,进而识别穿透时已作用的脉冲个数。研究结果表明,选取的光电二极管产生的电压信号幅值变化,可反映出打孔过程中孔形貌变化引起的材料上表面激光反射光强度变化,从而可将打孔进程划分为3个阶段,并成功识别出试验参数下穿透脉冲个数为14个。
In order to avoid damage to the inner surface of the cavity-containing parts and improve processing efficiency, it is necessary to determine the number of pulses required to penetrate the material during the laser drilling process. The photodiode is used to detect the light signal on the upper surface of the material during the laser percussion drilling processof GH3536 superalloy. And the acquired voltage signal is used to judge whether the material has been penetrated, then the number of pulses that have been applied when the material is penetratedcan be recognized. The results denote that the change of the voltage signal amplitude generated by the selected photodiode can reflect the change of the laser reflected light intensity on the upper surface of the material caused by the change of the hole morphology during the drilling process, thereby the drilling process can be divided into 3 stages, and it is successfully identified that the number of penetration pulses under the test parameters is 14.
作者
李浩
麦云飞
周静
Li Hao;Mai Yunfei;Zhou Jing(Schoolof Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《应用激光》
CSCD
北大核心
2021年第1期117-121,共5页
Applied Laser
