Study On Minitaper Laser Drilling Technique And Technology

Laser drilling is one of the-most important and wide-used method of the recent laser processing.In the recent years,with the raise of the microhole processing quality,all kinds of traditional microhole processing method can't meet the need of the depth-diameter ratio.As laser drilling can do it,it is already the most attentive processing method.This paper introduces all kinds of drilling method, advantage and disadvantage, the superiority of the laser drilling and the laser drilling system.This paper firstly explains the interaction machanism of laser and material,lays great emphasis on the interaction regular pattern of the metal and laser,thoroughly analyses the action of various effect.On the basis of it,this paper also explains the heat source model.Secondly,applied the method of finite difference to temperature field,we analyse the laser drilling numerical value.With the application of light-tracking method,we can calculate the light intensity of difference depth in laser drilling. At last we can calculate the hole-shaping and compare it with the experimental result.Lastly,on the basis of the experiment,we analysis the technology regularity.Analysing the energy injection mode,we put forward a new kind of laser drilling waveform.This kind of waveform can settle the laser power density drop of the previous teminator-phase waveform and the hole choking phenomenon.So it can raise the drilling precision.At last,on the basis of the experiment,we also explain the effect of off-focal value , repetition frequency and material characteristic parameter on the laser drilling.So we can raise the optimum scheme of the different drilling.