Research Of High-speed Tool Holder On The Centrifugal Expansion Dynamicly Compensating By Axial Corrugated Cone Sleeve

High speed machining tool system is an important part of high speed machining machine tool,in which the connection performance between tool handle and spindle directly affects the machining accuracy and efficiency of workpiece.The tool system at high rotational speed,due to the difference of centrifugal expansion amount,lead to the problem of radial clearance between the taper surface of the tool holder and the cone hole of the spindle.The connection performance of tool holder/spindle is reduced,and the speed of tool holder is limited.In order to improve the limit speed of the tool holder,a new type of high-speed tool holder is designed to compensate the centrifugal expansion by using the axial corrugated cone sleeve.Through theoretical calculation and finite element simulation analysis,the new high-speed tool holder is designed,and the connection performance of the tool handle / spindle is analyzed.The specific research contents are as follows:Firstly,a new type of high speed tool holder is designed: the locking nut and disc spring of non-standard parts are designed,and the initial preload and the required preloading force of the disc spring are determined by finite element simulation.The main structural parameters of corrugated cone sleeve are determined by finite element simulation and orthogonal test according to the size of HSK-E63 tool holder.Based on the analysis of the average contact stress between corrugated cone sleeve and cylindrical surface of tool holder,the range of interference of corrugated cone sleeve is determined,and the structural dimensions of corrugated cone sleeve and tool holder body are determined.Secondly,the connection performance of the new high-speed tool holder / spindle is analyzed.The positioning accuracy is analyzed.The radial stiffness under different rotating speed and bending moment is analyzed by finite element simulation and compared with HSK-E63 tool holder.The influence of rotational speed on radial compensation of corrugated cone sleeve and the average contact stress of cone,cylinder and end face are analyzed,and the limit speed of too holder is determined.Finally,the dynamic performance of the new high-speed tool holder is analyzed.The modal harmonious response of the new high-speed tool holder / spindle is analyzed by finite element simulation,and compared with the HSK-E63 tool holder.