Research About The Heat Distribution Proportion In Milling Process Of Titanium Alloy

Titanium alloy is a material which is difficult to machine,while is widely used in aerospace field.In milling process,the tool will be worn because of thermal-mechanical field,milling temperature etc.As primary indicator in metal machining process,milling temperature is the most important factor affecting the wearing of tool.In addition,temperature of machine tool may affect temperature field of spindle of the machine.It will can influence the machining precision and surface integrity.Therefore,this paper conducts a comprehensive research on the cutting heat distribution ratio transferred into the tool in milling process of the TC4 titanium alloy.First,this research developed the 3D model of the milling tool using the Solidworks software,due to the limitation of building complex 3D models in the finite element software-ABAQUS.The 3D model is developed based on the parameters of the milling tool that is provided by Sandvik~?company.Then,the surface heat flux applied to the rake face of the tool and the convective heat transfer coefficient in different rotate speed conditions can be obtained from the analytical model presented in the paper.Based on the results,the finite element analysis of the heat transferring in the tool has been implemented.The surface heat flux is proportionally applied to the tool-chip interface according to the time relationship of real cutting process.That is,the temperature field of tool is changed with time.It lays the foundation to research for the heat distribution proportion through performing finite element analysis(FEA)of heat transferring and temperature field of the tool in the milling process.Finally,the temperature of the end part of the tool has been measured.This research proposed a method which is a combination of a portable temperature acquisition and storage module and auxiliary equipment of machine tool handle,therefore the temperatures at any points of the end part of the high speeding tool can be measured.The results obtained from the experiments has been compared with the FEA results.Afterwards,the proportion of the surface heat flux load will be adjusted until the comparison coincide with each other.Thus,the accurate heat proportion transferred into the tool can be calculated by the actual heat flux load applied to the FE model divide by the total value calculated in the analytical model.