纤维夹角和铣削参数对CFRP铣削力的影响

为探索CFRP铣削加工中出现的分层、崩边等表面缺陷形成机理,对CFRP进行铣削加工实验。基于单因素实验法获得了纤维夹角对CFRP铣削力的影响规律,基于中心复合曲面设计,获得了硬质合金刀具铣削CFRP过程中铣削速度、每齿进给量和铣削深度对铣削力的影响规律,并构建了铣削力的预报模型。实验结果表明:纤维夹角在0°～90°,铣削力随纤维夹角的增大而降低,而在90°～180°,铣削力随纤维夹角的增大而增大。f_z和a_e对三个方向铣削力影响都较为显著。v_c对y向和z向铣削力影响较为显著,而对x向铣削力影响不显著。铣削力随三个铣削参数的升高而增大,其中每齿进给量对铣削力影响最大。

Influence of Fiber Angle and Milling Parameters on Milling Force of CFRP

In order to explore the formation mechanism of surface defects such as delamination and chipping in milling of CFRP,the milling experiment of CFRP was carried out. Based on the single factor method,the influence of the fiber angle on the milling forces of CFRP was obtained. Using the central composite response surface method,the influence of milling speed,feed per tooth and milling width on the milling forces was analyzed,and the prediction models of the milling forces during the milling of CFRP were established. The experimental results show that the milling forces decrease with the increase of the fiber angle from 0° to 90°,while the milling force increase with the increase of the fiber angle from 90° to 180°. f_z and a_e have a significant influence on the three-direction milling forces. v_c has a significant influence on the y-direction and z-direction milling forces,while the influence on the x-direction milling force is not significant;the milling forces increase with the three milling parameters,and the feed per tooth has the greatest influence on the milling forces.