工艺参数对CFRP切削次表面损伤的影响  

Influence of Cutting Parameters on Subsurface Damages in CFRP Orthogonal Cutting

作　　者：骆迎昕 梁青霄 候国义 曹思鹏 LUO Yingxin;LIANG Qingxiao;HOU Guoyi;CAO Sipeng(AVIC Xi’an Aircraft Industry Group Company Ltd.,Xi’an 710089,China;Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]中航西安飞机工业集团股份有限公司,西安710089 [2]西北工业大学,西安710072

出　　处：《航空制造技术》2023年第20期118-125,共8页Aeronautical Manufacturing Technology

摘　　要：研究了工艺参数对CFRP加工温度及次表面损伤的影响,开展了包含刀具前角、后角以及切深3种工艺参数在6种纤维切削角(Fiber cutting angle,FCA)下的直角切削试验,并测量了切削温度。结果表明,前角的增加会减小刀具挤压作用从而减小切削力与表面温度。在θ=90°时,前角与后角的增加会有效抑制次表面损伤的出现;在θ=120°时,前角增大会造成次表面纤维弯折角减小与纤维断裂损伤明显增加;在θ=150°时,弯曲断裂会造成明显的锯齿状加工表面,前角与后角的增加均能有效减少次表面损伤的产生。切深的增加会导致切削力和加工表面温度增加,并显著增加次表面损伤。In order to investigate the influence of cutting parameters on machined surface temperature and subsurface damages,a CFRP orthogonal cutting experiment was conducted at various fiber cutting angles with different rake angles,flank angles and cutting depths,and cutting temperature was also measured.Results show the increasing of rake angle and flank angle can decrease the cutting force and surface temperature by decreasing the compressive force and contact area between flank face and machined wall separately.The most serious subsurface damages occur when against fiber cutting,which are induced by fiber bending fracture,resulting in obvious serrated surface atθ=150°.The fiber bending angle and irregular fracture are decreased with rake angle and flank angle increasing.Moreover,the obvious increase trends of cutting force,machined surface temperature and subsurface damage are confirmed as cutting depth increased.

关 键 词：CFRP直角切削 切削工艺参数 次表面损伤 刀具几何参数 切深 

分 类 号：V261.2[航空宇航科学与技术—航空宇航制造工程] TQ342.742[化学工程—化纤工业] TB33[一般工业技术—材料科学与工程]