基于钝圆尺寸效应的微细切削机理试验研究

通过微细车削试验,研究了微细切削加工参数对切削力、表面质量、切屑形成的影响,发现切削厚度与刃口半径的比值是影响微细切削的关键因素,当该比值过小时,刃口尺寸效应作用极其显著,导致切削比能迅速增大,表面质量恶化,切屑形成困难。根据这一结论可确定微细切削加工参数选择的下限范围,从而为微细切削加工参数选择提供理论依据。

An Experimental Study of Tool Cutting Radius Size Effect in Micro Cutting Processes

A micro cutting experiment was carried out to study how much the cutting edge radius size effect influence the cutting force, surface quality and chip formation. It is finded out when depth of cut is much less than tool cutting edge radius, the cutting edge radius size effect has a significant influence on micro cutting process, which results in rapid growth of specific cutting energy, bad surface quality and difficulties on chip formation. The experimental conclusions show the minimum cutting parameters of micro cutting and can be used as a guide of micro cutting parameter selection.