Deformation And Fatigue Analysis Of Indexable High Speed Milling Cutter Blade Fastening Screw

In order to adapt to the size of cutter slot space and meet the safety requirements of high speed milling,positioning and clamping of high speed indexable milling cutter by screw has become the most common clamping method.But,at the same time,the use and development of the screw rely too much on experience,lack of scientific basis,there are many problems,such as waste of resources,safety risks and so on.In order to solve these problems,this paper is based on the force and failure situation of the screw,and the deformation and fatigue of the screw are studied as the main objects.In order to ensure the smooth progress of the research process,this paper first carries on the detailed analysis and discussion to the force of Milling cutter.In addition,a reasonable and reliable ANSYS finite element model is established and verified.Then,based on material mechanics,superposition method and solving method of deflection of cantilever beam with variable cross section,the maximum deformation of the screw is calculated theoretically,and the corresponding expression is given and verified by simulation.In addition,the transmission modes of centrifugal force and cutting force to each part of the system are analyzed by the finite element method,which provides the possibility of predicting and controlling of the screw deformation caused by machining parameters in the process of milling.Then,the causes of screw fatigue failure were studied,and the factors that might affect the fatigue life of the screw were analyzed by single factor analysis,and the approximate influence rule of these factors on the screw fatigue was obtained.On the basis of cumulative fatigue damage theory and uniform test design method,the relationship between screw fatigue life and preloading force,centrifugal force,feed per tooth and back engagement was obtained by regression analysis,and the significance test was passed.Finally,according to the research conclusions of the two parts,optimization suggestions and references are given for the milling cutter technological parameters and the part geometric dimensions of the fit between the blade and the screw.based on the results of the deformation and fatigue life of Screw,not only filled the shortage of the fastening screw theory,In the actual production,it can also play a very good role in predicting,avoiding the danger associated with high speed and the waste of the use of the blade fastening screw.In addition,it also provides a new idea for the control of the processing quality of parts.