摘要
目的减少芳纶纤维复合材料制孔的表面缺陷。方法通过对芳纶纤维复合材料进行钻削试验,研究钻削过程中刀具的作用机理。通过不同切削速度和进给速度对制孔入口表面缺陷和孔内壁表面粗糙度的影响,研究制孔过程中的缺陷损伤,并进行相关评定。通过改变装夹工艺方式,研究装夹工艺系统的刚度对制孔表面缺陷的影响。结果切削速度与进给速度对制孔表面缺陷的影响较大,切削速度和进给速度不断增大,孔径入口撕裂区域面积增大,孔径周围毛刺分布呈先减小、后增大的趋势。随着进给速度的增大,切削力总体呈减少趋势。试验表明,切削速度为62.83 m/min时,切削力最大,此时振动频率接近工艺系统的固有频率,出现共振现象。孔径内壁质量与切削速度成正比,与进给速度成反比。提高装夹工艺系统刚度,可以减少制孔入口的表面缺陷。对芳纶纤维复合材料板进行制孔试验,切削速度为87.96 m/min、进给速度为60 mm/min时,获得的表面质量最佳。结论在高转速、大进给情况下,加工表面缺陷较严重,应避免用此工艺参数对芳纶纤维复合材料板进行加工。工艺系统的装夹方式对制孔缺陷的影响较大,工艺系统的刚度越高,制孔质量越好。
This paper aims to reduce the surface defects of holes made by aramid fiber composites.Tool action mechanism during drilling is studied through the drilling test of aramid fiber composites.The defect damage during hole-making process is studied and evaluated by changing the influence of cutting speed and feed speed on the surface defects of hole-making entrance and the surface roughness of hole inner wall.The effect of the rigidity of the clamping process system on the surface defects of the hole is studied by changing the clamping process.The cutting speed and feed speed have a great influence on the surface defects of the hole making.With the continuous increase of cutting speed and feed rate,the area of the torn area at the entrance of the aperture increases,and the burr distribution around the aperture first decreases and then increases;the cutting force generally decreases with the increase in feed speed.It shows that when the cutting speed is 62.83 m/min,the cutting force is the largest.At this time,the vibration frequency is close to the natural frequency of the processing system,and resonance phenomenon occurs;the quality of the inner wall of the aperture is proportional to the cutting speed and inversely proportional to the feed speed;improving the rigidity of the clamping process,which can reduce the surface defects of the hole entrance.The hole-making test is carried out on the aramid fiber composite board when the cutting speed is 87.96 m/min and the feed speed is 60 mm/min,the surface quality obtained is the best.In the case of high speed and large feed,the processing surface defects are more serious,and the processing of aramid fiber composite plates should be avoided in this process parameter;the clamping method of the processing system has a greater impact on the hole-making defects.The higher the rigidity of the process system,the better the hole quality.
作者
石文天
庞庆超
刘玉德
李杰
任冰
SHI Wen-tian;PANG Qing-chao;LIU Yu-de;LI Jie;REN Bing(School of Artificial Intelligence,Beijing Technology and Business University,Beijing 100048,China;Department of Mechanical and Aerospace Engineering,University of Florida,Gainesville FL 32611,USA)
出处
《表面技术》
EI
CAS
CSCD
北大核心
2022年第1期184-191,共8页
Surface Technology
基金
国家自然科学基金项目(51975006,51505006)
2021年北京工商大学研究生科研能力提升计划项目。
关键词
芳纶纤维复合材料
制孔表面缺陷
孔内壁粗糙度
装夹方式
aramid fiber composites
hole-making defects
roughness of inner wall of hole
clamping method
