Research On Dust Removal Technology Of Laser Cutting Machine Based On Gas-Solid Two-Phase Flow

With the rapid development of social economy and the continuous progress of manufacturing industry,the power of laser cutting machine gradually develops from small power to medium power and then to high power and even super high power,and the amount of smoke and dust generated by cutting increases accordingly.The dust removal device puts forward higher requirements.In the previous cutting and dust removal process,dust removal hoods,blowing and suction dust removal and full-open dust removal methods were mainly used.There was often a phenomenon that the smoke and dust could not be removed and white smoke appeared on the cutting surface,which not only polluted the working environment,but also endangered the health of employees.And it is easy to damage the laser cutting head,which reduces the quality and efficiency of cutting.In view of the above situation,this paper studies the laser cutting dust removal technology.Based on the laser cutting machine of the cooperative enterprise,the dust removal technology is researched and analyzed.The main research contents are as follows:(1)Briefly analyze the overall structure and working process of the laser cutting machine,design the partition dust removal device according to the structure and size of the laser cutting machine manufactured by the enterprise,analyze its mathematical model,and at the same time analyze the physical characteristics of the smoke and dust Based on the research and analysis of the force,the relevant motion equations were established,and the interaction relationship between the dust and the airflow was obtained,which provided theoretical guidance for the simulation analysis and improvement of the follow-up dust removal device.(2)In this chapter,the DPM model in Fluent is used to simulate and analyze the internal flow field of the initial dust removal device,and the single variable method is used to analyze the influence of four factors on the air volume at the outlet,the area of the suction port,the distance from the suction port to the cutting position,and the particle mass flow rate.Influence law of dust removal effect,and design four-factor three-level orthogonal test table,analyze the dust removal effect of different parameter combinations,get the primary and secondary order of each factor,the optimal level within the test range and the optimal parameter combination.(3)Analyze the requirements of the control system of the dust removal device,and conduct research and design on its overall control scheme.Research and analyze the control principle of partition control system,self-start and stop control of dust removal fan and frequency conversion control,then select the hardware type of the control system and design the hardware circuit,and finally carry out software design for it,and develop the corresponding humancomputer interaction interface.(4)Experiments were carried out to verify the structure of the orthogonally optimized dust removal device,and the dust removal effect of each combination of parameters before and after optimization was compared.The results showed that the test reached the expected goal and met the requirements of dust removal.In this paper,through the research of laser cutting machine dedusting technology,the structure design and parameter optimization of the dedusting device are carried out to improve the dedusting efficiency,and the corresponding dedusting control is studied to improve the intelligent and energy-saving level,which provides a reference value for the future development of laser cutting dedusting technology.