Finite Element Analysis and Experimental Study of Impact Forces of Half-wide Plunge Milling
Half-wide plunge milling is a typical cavity machining method,in the process of cut-in and cut-out,the sudden change of tool-chip contact width will cause a large impact force,which will cause premature failure of the tool.By combining finite element simulation and tests,impact force in half-wide plunge milling is studied.Taking 40Cr alloy steel as the research object,finite element model for half-wide plunge milling is established,impact force is characterized by the tan-gential force at the moment corresponding to the abrupt change in tool-chip contact width.The effect law of each cutting pa-rameter on tool impact force is studied by using extreme difference analysis and single factor analysis,and the validity of the model is verified by experiment.Experimental results show that the relative error of impact force of simulation and experi-ment is within10%,the finite element calculation model can be used for impact force prediction and cutting parameter opti-mization in half-wide plunge milling.The impact force is proportional to the interpolation step and the feed per tooth,and in-creases and then decreases with the increase of cutting speed.
half-wide plunge millingtool-chip contact widthfinite elementtestimpact force