Design And Optimization Of 3D Chip Breaker Structure Of CNC Turning Tool

With the rapid development of modern manufacturing,metal cutting is developing towards high-speed,intelligent and high-precision.In the metal cutting process,the tool interacts with the material,and the parts that meet the requirements can be obtained.Among them,the tool plays an important role in the machining process.The cutting performance of the tool will affect the machining efficiency and the quality of the workpiece.It has a non-negligible impact on the development of productivity and the growth of economic benefits,and even the entire machinery manufacturing industry.Development has a certain impact.Setting a chipbreaker on the rake face of the tool is an effective way to control the shape and flow of the chip.The reasonable design and optimization of the three-dimensional chipbreaker parameters can improve the cutting performance and service life of the tool.First of all,combined with the research status of the chipbreaker,the significance of the research on the chipbreaker of the cutting tool is explained,the control theory of the chip is summarized,the four stages of the development of the chipbreaker are described as time goes by,and the chip breaker is analyzed.The three models of forming,crimping and breaking analyze the current development status of 3D chipbreaker inserts at home and abroad.Secondly,starting from the structure and function of the chip breaker,the chip breaking mechanism of the chip is analyzed,and the many roles played by the chip breaker in the cutting process are proposed.The generalization and classification standards of tool geometries at home and abroad are respectively elaborated,and the classification methods of several well-known tool production companies abroad are exemplified,and the characteristics of tool geometries classification are summarized.The factors affecting chip breaking are analyzed from four aspects: cutting amount,tool geometry angle,chip breaker geometry parameters,and workpiece material.Then,the metal cutting finite element simulation theory is analyzed,the basic idea of the finite element analysis method and three nonlinear problems are introduced,and the characteristics of the nonlinear finite element are summarized.The constitutive relationship of the elastoplastic finite element theory is introduced,combined with the mechanical problems of thermal-mechanical coupling deformation,and the characteristics of the metal cutting process are summarized.In the finite element simulation software ABAQUS,three two-dimensional double groove structure models are constructed,and the Johson-cook model and the Johson-cook material failure criterion are used to obtain the three types of groove cutting force and cutting temperature curves with time.As a result,the cutting force and heat generated during cutting are small,and the cutting process is relatively stable.Finally,based on the single factor method and response surface analysis method,using stainless steel AISI316 as the material,the cutting simulation research is carried out.A three-dimensional finite element simulation cutting model of the tool and workpiece is established to analyze the distribution and change of cutting force and tool tip temperature.Using the single factor analysis method,five groups of different tool parameters were designed for research,and the influence of the rake angle,the back angle and the width of the grooved tool on the tool tip temperature and cutting force was explored.Using response surface analysis method,the mathematical model of cutting force and tool tip temperature is established,and the influence degree of tool geometry structure on cutting force and tool tip temperature is obtained through the comparison of cloud diagrams.The fitting effect of the model is significant,and the research results provide a certain theoretical basis for the structural design and optimization of the three-dimensional groove.