Design And Research Of High Performance Complex Surface Five Axis Tool Grinder

In "Made in China 2025",China clearly points out that high-end CNC machine tools and robots will be listed as one of the ten key fields,and a batch of CNC machine tools and basic equipment and integrated manufacturing systems with the advantages of precision,high-speed,high efficiency and high flexibility will be developed.Five axis tool grinding machines have rapidly developed in the manufacturing industry due to their advantages of high efficiency and flexibility.With the trend of increasingly complex CNC tool products,the requirements for five axis tool grinding machines are also constantly increasing.Nowadays,the five axis tool grinders in China are all universal grinders,which are designed for processing standard CNC cutting tools;For non-standard CNC tools with complex profiles and high surface roughness requirements,universal grinding machines cannot meet the processing requirements,which poses greater challenges for five axis tool grinding machines.Therefore,designing a five axis tool grinder with simple structure,stable performance,and reliable accuracy for non-standard CNC tools with complex surfaces and high machining accuracy requirements is of great significance for CNC tools and manufacturing industry.In this context and based on the actual needs of enterprises,this article combines virtual prototyping technology to study key issues such as the design of the mechanical structure,static and dynamic characteristics analysis of the structure,and geometric error analysis of a five axis linkage tool grinder.The specific content includes the following:(1)Analyze the current development status of five axis tool grinders,virtual prototyping technology,and geometric error research both domestically and internationally,understand the structural layout and some parameters of various five axis tool grinders,and analyze the machining requirements of workpieces.Determine the structural layout of the five axis tool grinder based on the machining requirements and structural layout form of the workpiece,and complete the structural design of the main components,including the design of the main support components(bed body,column),feed components,spindle components,and selection of roller screws and motors.At the same time,model the grinder components and assemble the entire machine prototype based on the Inventor platform.(2)Use ANSYS workbench finite element analysis software to analyze the static and dynamic characteristics of the key components(bed,column)of the five axis tool grinder,and explore their rigidity and stability.Conduct modal analysis and harmonic response analysis on the entire machine,and based on the analysis results,identify the components that have the greatest impact on the dynamic characteristics of the grinding machine,guiding subsequent optimization work.(3)Through multi-body system theory and homogeneous transformation theory,the geometric error model of five axis tool grinder is established,and the Sobol global sensitivity analysis method is used to identify the main Error term that affect the geometric accuracy of the grinder,providing a theoretical basis for subsequent error compensation.(4)Based on the results of finite element analysis,the weak links of the entire machine were optimized and designed.Through the ANSYS workbench platform combined with combination experiments,statistical analysis,and response surface methodology,multi-objective size optimization design was carried out on the spindle box.(5)The geometric accuracy and positioning accuracy of the five axis tool grinder are tested using instruments such as a micrometer and laser interferometer to ensure the high accuracy of the grinder.