基于切削力控制的薄壁件变铣削工艺参数研究

Research on Variable Milling Process Parameters of Thin-walled Parts Based on Cutting Force Control

由于具有比强度高的优点,铝合金成为航空航天薄壁零件的主要材料之一。但航空航天铝合金薄壁件的刚度一般较低,在加工过程中易受刀具磨损、切削力等影响,造成零件的加工质量降低。针对加工适配器壳体零件,基于恒切削力控制的方法,采用加工过程中变进给量的工艺策略进行切削参数的优化,分别对恒进给速度、以控制切向力为目标的变进给速度和以控制轴向力为目标的变进给速度,共三种条件下的加工效率、铣刀磨损和加工零件表面粗糙度开展研究,通过比较三项指标,得出最适合该零件的切削加工工艺为:以控制轴向力为目标的变进给工艺策略。

Aluminum alloy has become one of the main materials for aerospace thin-wall parts due to its advantages of higher strength. But the stiffness of aluminum alloy thin-walled parts in aerospace is generally low, and it is easy to be affected by tool wear and cutting force in the process of machining, resulting in parts processing quality reduction. According to the processing adapter shell parts, based on constant cutting force control, the process strategy of variable feedis adopted to optimize the cutting parameters. Research was conducted on the processing efficiency, cutter wear and surface roughness of machined parts under three conditions: constant feed speed, variable feed speed with controlling tangential force as the target and variable feed speed with controlling axial force as the target, and it is concluded that the most suitable cutting process for this part is variable feed process strategy aiming at controlling axial force.