Research On The Commonness Of HSK Tooling System Precision

High-speed processing technology as one of the most advanced manufacturing technology in machinery manufacturing,with its efficient,high quality,low consumption of the unique advantages widely used in the automotive industry,aerospace,military manufacturing and other industrial fields.As the core function of high-speed machining technology is the tool system,its own performance directly affects the entire machine tool processing efficiency,processing quality and service life.The accuracy of the tool system(including connection accuracy,geometric accuracy and dynamic balance accuracy)directly affects its own performance.How to reasonably and effectively reveal the influencing factors and influencing rules of these precision problems is of great theoretical and practical value to the design,manufacture and use of the handle.Based on the analysis of theoretical methods,this paper systematically studies the accuracy of HSK toolholder/spindle with the methods of finite element numerical simulation and experimental analysis.The main work and conclusions are as follows:(1)The mechanical model of the elastic jaw force is established by the elasticplastic mechanics method.Based on the finite element analysis method of the radial deflection and the axial deflection of the jaws,the clamping force and the interference amount HSK tooling system positioning accuracy of the law,and with the positioning accuracy of experimental analysis of the results of comparative analysis,revealing the amount of interference to ensure the accuracy of the tool system positioning a decisive role.(2)Based on the finite element simulation method,the influence of different geometric accuracy on the rigidity of the system is analyzed.It is determined that the size of the clamping hole,the size of the clamping surface and the taper have a great influence on the rigidity of the tooling system.The significant factors of axial stiffness and radial stiffness are analyzed by the combination of orthogonal experiment and numerical simulation.The most significant factor of axial stiffness is the size of clamping surface.The most significant factor of radial stiffness is taper,which provides a theoretical reference for the manufacturing precision of important dimensions in the process of manufacturing the handle.(3)Based on the theory of kinematic elasticity,the centroid motion model of the deformed rigid body in the inertial coordinate system is established and the formula is given.The finite element simulation results show that the clamping force of the clamping mechanism is not uniform and the manufacturing position error the influence of the accuracy of the clamping force of the clamping mechanism,the degree of the conical surface and the effect of the full beating on the dynamic balance accuracy grade are revealed.(4)Contrast analysis of the actual dynamic balance accuracy and the original dynamic balance accuracy in the speed of the relationship between the change in speed on the actual dynamic balance accuracy level of the law,for the choice of correction coefficient provides a reference;based on UG advanced simulation analysis The influence of different imbalance on the machining precision is revealed,and the influence of the tool nose displacement offset and the unbalance and the natural frequency are revealed,which provides the basis for the control of the unbalance in the process.