Research On Micro Hole Machining Equipment And Process Of Injector Based On Picosecond Laser

With the development of science and technology,the manufacturing industry has gradually entered the wave of intelligent green development.Some of the new intelligent devices have increasingly higher requirements for the quality of micro-holes.With the traditional micro-holes processing methods has been unable to meet the increasingly stringent quality requirements.The ultra-fast pulsed laser has unique advantages over the traditional processing methods,such as high energy density,good focusing characteristics,small heat-affected zone and good beam quality,which can meet the special requirements of some high-precision micro-hole machining,In particular,picosecond lasers have been widely used in the field of laser fine processing due to their high stability and little thermal effects when ablating metallic materials.From the mechanism of laser material removal,the use of picosecond lasers processing of high-quality micro-holes.In this paper,SUS304 stainless steel as the experimental material,the use of picosecond pulsed laser micro-machining test to study the laser processing parameters and processing methods on the quality of micro-pores,and ultimately get high-quality micro-holes injector.In the field of ultra-fast pulsed laser machining applications and improve the quality of micro-hole injector has a certain reference value.In this paper,the characteristics of laser beam and the mechanism of laser micro-holes machining are analyzed in detail.Then the general process of interaction with the ablated target during laser processing is introduced.The classical theory of two-temperature model is simplified and Solving and further analyzing the complicated coexistence of ablation mechanism including balanced and unbalanced ablation during the picosecond laser processing,this feature makes it compared with continuous laser and nanosecond laser Metal material processing thermal impact has some advantages.Furthermore,the main methods of laser drilling which can be used for the preparation of metal micro-holes are described in detail.The characteristics and application of multi-pulse tapping method and rotary cutting method are illustrated.Some existing methods of peeling According to the required process requirements,the laser scanning system is selected,and the picosecond laser micro-hole machining system is designed according to the specific processing requirements and equipment is set up.Using the self-built picosecond laser processing equipment,the research of micro-holes processing technology on stainless steel was carried out.The factors influencing the machining quality(roundness and taper)of micro-holes were analyzed preliminarily through experiments:the energy of laser,pulse width,and defocus amount at the processing point.Then the single-factor test is conducted by the control variable method,the processed sample is measured and the obtained test result is analyzed.The process parameters(pulse energy,pulse width and defocus amount)are optimized and selected according to the measured micro-holes processing quality The best parameters to process nozzle orifice.According to the requirements of the process,the processing equipment is set up and the process test is carried out.The experimental data of the micro-holes laser machining test of the injector is also analyzed.The theory and practice are used to test the micro-holes effect of the pulsed laser machining.Picosecond Laser peeler process Injector high-quality micro-holes process parameters.Experimental verification of such micro-holes processing technology and test parameters for injector micro-holes laser processing technology to provide reference and reference.