Research On Mechanism And Application Technology Of Rotary Abrasive Flow Refining For Cemented Carbide Tools

In mechanical machining,the tool is known as the "teeth" of industry.Tool technology plays an important role in improving processing quality,improving processing efficiency and reducing processing costs.Traditional cutting edge processing methods cannot meet the requirements of modern processing either in terms of processing quality or tool life.In order to further improve the cutting edge processing quality,this paper combines the processing experience of traditional abrasive flow and polishing technology,and proposes a rotary abrasive flow processing method to refine the cutting edge,so as to improve the processing quality and improve the tool life.Through the study of abrasive flow machining mechanism,feasibility analysis of experiment,optimization of process parameters and experimental study of cutting process,the influence of abrasive flow machining method on tool surface quality is revealed.The main contents of the research are as follows:(1)The machining mechanism of abrasive flow is analyzed and studied.According to the geometrical characteristics of the tool,the processing scheme of Rotating-Abrasive Flow Machining(R-AFM)is proposed.The material removal model and work-piece surface roughness model in abrasive flow machining are analyzed theoretically.Meanwhile,the characteristics of abrasive flow machining and the influence rule of cutting tools with some processing parameters are analyzed by ANSYS Fluent simulation software.The analysis shows that the processing quality of abrasive flow can be improved by increasing the polishing pressure and the tool rotation speed properly;R-AFM is more effective than traditional abrasive flow machining.(2)The influence of R-AFM processing parameters on the quality and efficiency of tool edge refinement was studied.Multi-factor orthogonal experiment was used to study the processing parameters of R-AFM.The roughness of tool surface was taken as the evaluation index.The influence of polishing pressure,abrasive concentration,processing time and tool rotation speed on the roughness of tool surface was analyzed by using range and factor index diagram.It was found that polishing pressure had the greatest influence on the roughness of tool surface,followed by tool rotation speed,the third is the processing time,and the last is the abrasive concentration.(3)Based on the orthogonal experimental data,the mathematical prediction model of tool surface roughness was established by using the method of multiple linear regression with MATLAB software,and the prediction model is checked and analyzed..(4)Cutting performance experiment and evaluation of the cutting tool after edge refinement technology treatment are carried out.The influence of different processing methods on cutting temperature,cutting force and surface quality of work-piece under the same cutting parameters is analyzed and compared through cutting experiment.The experiment shows that the cutting tool treated by R-AFM can obtain better machining quality and durability.The research work and results of this paper enrich the application technology of cutting tools,help to improve the quality of cutting tool products and enhance the competitiveness of cutting tool enterprises in China.