钻孔过程中切削温度对CFRP亚表面的影响  

Effects of Cutting Temperature on CFRP Subsurface in Drilling Process

作　　者：王奔 王禹封 赵华 王明海 Wang Ben;Wang Yufeng;Zhao Hua;Wang Minghai(School of Mechatronics Engineering,Shenyang Aerospace University,Shenyang 110136,China;Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学机电工程学院,辽宁沈阳110136 [2]沈阳航空航天大学航空制造工艺数字化国防重点学科实验室,辽宁沈阳110136

出　　处：《稀有金属材料与工程》2022年第5期1613-1619,共7页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51875367,51505302);China Postdoctoral Science Foundation(2020M670790);Shenyang Youth Science and Technology Innovation Project(RC190072);Natural Science Foundation of Liaoning Province(2020-MS-234);Foundation of Liaoning Educational Committee(JYT2020004)。

摘　　要：研究了碳纤维增强聚合物(CFRP)/Ti叠层构件钻孔时切削温度对钻孔质量的影响,分析了有无钛合金支撑层制孔时CFRP的切削力、切削热、孔壁表面和亚表面质量,并提出了亚表面损伤评价方法。结果表明,钻孔时钛合金支撑层对CFRP切削力及表面质量的影响较小,但对切削温度和亚表面质量影响显著。刀具同时加工钛合金和CFRP时会产生大量切削热,导致CFRP孔出口处温度大幅升高,高温导致CFRP树脂基体的刚度和粘结性能下降,使得CFRP孔出口附近纤维层上出现了严重的亚表面损伤。同时,采用提出的亚表面损伤评价方法对亚表面损伤进行评价,发现靠近出口处的纤维层亚表面损伤最为严重。在远离出口平面的方向上,亚表面损伤程度逐渐降低。因此,CFRP/Ti叠层构件钻孔过程中切削温度显著影响CFRP孔的亚表面质量,且亚表面的损伤程度是评价CFRP加工质量的重要因素。The effect of cutting temperatures on the hole quality in multi-layered carbon fibre reinforced polymer(CFRP)/Ti stacks was investigated.The cutting force,cutting heat,hole surface,and subsurface quality of CFRP during drilling with and without Ti alloy supporting layer were analyzed,and the evaluation method for subsurface damage was proposed.The results show the cutting temperature and subsurface quality are greatly influenced by the existence or absence of Ti alloy supporting layer,whereas the cutting force and surface quality are slightly affected.A large amount of cutting heat is generated during cutting process of CFRP and Ti alloy simultaneously,resulting in the significant increase in temperature at the exit part of CFRP holes.The high temperature reduces the rigidity and bonding performance of CFRP resin matrix,leading to serious subsurface damage of the fibre layers around the exit part of CFRP holes.The subsurface damage was also evaluated by the proposed method,and the fibre layer at the exit part of holes is the most damaged,and the farther the distance away from the exit part of holes,the less damaged the subsurface.Therefore,the cutting temperature significantly influences the subsurface quality of CFRP hole during the drilling of multi-layered CFRP/Ti stacks,and subsurface damage is crucial to evaluate the machining quality of CFRP.

关 键 词：钻孔 CFRP/Ti叠层构件 亚表面质量 温度 损伤评价 

分 类 号：TQ342.742[化学工程—化纤工业] TB332[一般工业技术—材料科学与工程]