%0 Journal Article
%T CFRP/Al叠层结构钻铰锪一体制孔切削力建模与预测技术<br>Cutting Force Modeling and Predicting Method for CFRP/Al Stacks with Drilling-reaming Countersinking Integrated Machining
%A 王宁
%A 张开富
%A 祝起凡
%J 机械科学与技术
%D 2016
%X 针对钻铰锪复合刀具一体制孔过程,构建瞬时切削力模型,为制孔切削力优化、抑制CFRP/Al叠层结构的制孔缺陷提供理论依据。将CFRP/Al叠层结构钻铰锪一体制孔过程拆分为钻削、铰削、锪窝,基于CFRP与Al的细观斜角切削模型,分别建立钻削、铰削、锪窝过程的动态切削力(轴向力与扭矩)模型。根据切削特点及所处切削状态对制孔过程进行阶段划分,利用钻削、铰削以及锪窝的切削力模型,计算出相应阶段的切削力。根据工作前角数学模型,分别建立钻削、铰削、锪窝过程的前角均值、剪切角均值和摩擦角均值的数学模型,并且给出纤维方向角关于时间的变化模型。基于接触力学理论建立横刃的切削力模型,最终形成CFRP/Al叠层结构钻铰锪一体制孔刀具的瞬时切削力的模型。最后,搭建制孔试验平台,进行钻铰锪一体制孔试验,验证瞬时切削力模型的正确性与可靠性。<br>This paper establishes the instantaneous model of cutting force of composite tool to realize controlling cutting force and provide the basis for inhibiting damage. The hole-machining process is divided into three processing operations:drilling, reaming and countersinking. The dynamic cutting force(thrust force and torque) models of the three processing operations are established based on the microscopic oblique cutting model. According to the cutting characteristics and states, we divide the hole-machining process into several stages. By studying the characteristics of each stage, the dynamic cutting force models of the three processing operations are employed to calculate the cutting force of the corresponding stage. Based on the actual rake angle model, the average value of rake angle is introduced then. We establish the expressions of average values of shear angle and friction angle as well as fiber orientation angle according to the respective relationships between distinct angles. A prediction model of the cutting force for the chisel edge is proposed with the theory of contact mechanics and the final instantaneous model of cutting force on hole-machining is well-established. Finally, several groups of experiments using the composite tool integrated with drilling, reaming and countersinking are carried out to verify the correctness and reliability of the model
%K CFRP/AL叠层结构
%K 斜角切削
%K 钻铰锪一体制孔
%K 切削力&lt
%K br&gt
%K calculations
%K carbon fiber reinforced
%K design of experiments
%K drilling
%K experiments
%K friction
%K mathematical models
%K plastics
%K reaming
%K reliability
%K schematic diagrams
%K torque
%K CFRP/Al stacks
%K cutting force
%K drilling-reaming-countersinking integrated machining
%K oblique cutting
%U http://journals.nwpu.edu.cn/jxkxyjs/CN/abstract/abstract6274.shtml