The Design And Performance Study Of High-speed Toolholder With High Elasticity Taper

As the connecting link of spindle and tool, the toolholder plays an important role inhigh speed machining. Nowadays, with the development of high speed machiningtechnology, the widely used BT has been unable to meet the processing requirements,therefore spindle speed’s further improving has forced the development of a newgeneration of high-speed toolholder with high-performance.According to high-speed machining requirements and some disadvantages andshortcomings of other high-speed toolholders such as HSK, a new type of toolholder isdesigned and its performance is studied. Through the analysis of theoretical results andthe finite element results, the limit speed of the new toolholder has been improved, and ithas some performance advantages compared with HSK-E63.Firstly，the structure of the new high-speed toolholder is designed. Removingmaterial from the toolholder cone is considered to increase the cone flexibility andthrough elastic deformation the magnitude of interference is raised to improve the limitspeed of the high-speed toolholder. The Proe/E software is used to establish the model,and through theoretical calculation and ANSYS simulation the optimal combination inthe grooves parameters is determined by comparing with HSK-E63.Secondly, the static performance of the new toolholer is analyzed. Theoreticalanalysis and finite element simulation are used to study the static performance oftoolholder, calculating the radial deformation, contact stress and static stiffness of thetoolholder/spindle, and the theoretical limit speed is obtained under the premise ofmeeting the performance index.Finally，the high-speed performance of the new toolholer is analyzed. By applying acertain centrifugal loads on the finite element model, the match and deformation oftoolholder and spindle under different speeds are analyzed to obtain the contact pressuredistribution of cone and end face and the variation of interface radial stiffness with loadsituation; the limit speed of the new toolholder is determined after comprehensiveconsideration, which is greater than that of HSK-E63.