Experimental Study And Simulation On Cutting Force During Machining Of Titanium Alloys In Aerospace

The titanium alloy had been widely used in the aerospace industry, its majormanufacturing parts are thin-walled pieces whose shape accuracy is very sensitive tocutting force,so depth study the characteristics of cutting force during machining oftitanium alloys is very important.In this paper, we adopt the way of combining experimental research and FEM tostudy cutting force of the titanium alloy. Based on the production practice,we formulatethe non-free cutting three-dimensional geometric model.Besides,we incorporate the toolradius and the machined surface rebound into the model. Combination of high-speedcutting, MQL technology and so on,the experiment studies the influence that threecutting elements,tool wear, tool material and lubrication conditions for titanium alloycutting force.By analysis orthogonal test and regression, we fit the empirical formula ofthree TC4titanium alloy cutting force. Thus,we established TC4titanium alloy materialmodel, friction model, and determine the chip separation criteria and fracture criteria.By three-dimensional simulation,we analyzed the infiuence of cutting force duringhigh-speed cutting and cutting temperature variation on the cutting force.In the sameway, we analyzed the relationship between tool angle on the cutting force and serratedchip on cutting force vibration.The research results show that the tool radius has important implications of thefeed force and back force. The Tool Wear has a seriously affect on cutting force,wecan monitor Tool wear by observing change of cutting force. MQL can effectivelyreduce the cutting forces. Serrated chip formation will cause the cutting forcefluctuations in the same frequency...