摘要
针对仿生蛋形壳体加工技术复杂、变形不均匀、成形精度差等问题,提出采用固体非金属颗粒介质胀形工艺来提高仿生蛋形壳体塑性成形的加工精度和表面质量。运用数值分析软件建立了仿生蛋形壳体颗粒介质胀形工艺的数值分析模型,针对在粒径为Φ1.8~Φ2.0 mm的颗粒作用下仿生蛋形壳体的塑性形变过程和应力分布,分析了起皱失稳原因。基于仿生蛋形壳体颗粒介质胀形试验,获得了不同粒径颗粒作用下的仿生蛋形壳体,通过分析不同粒径颗粒作用下仿生蛋形壳体的褶皱、内表面划痕、外表面形貌和外表面粗糙度,研究了颗粒粒径对仿生蛋形壳体失稳和表面质量的影响规律。结果表明,随着颗粒粒径的减小,仿生蛋形壳体的最终胀形压力增加,失稳现象加剧,且外表面的粗糙度更小,整体表面质量提高。
For the problems of complex processing technology,uneven deformation and poor forming accuracy of bionic egg-shaped shell,the solid non-metallic granular medium bulging process was proposed to enhance the processing accuracy and surface quality of plastic forming for bionic egg-shaped shells,and the numerical analysis model of granular medium bulging process for bionic egg-shaped shell was established by numerical analysis software.Then,by analyzing the plastic deformation process and stress distribution of bionic egg-shaped shell under the action of granular with the particle diameter ofΦ1.8-Φ2.0 mm,the causes of wrinkling and instability for bionic egg-shaped shell were analyzed,and the bionic egg-shaped shells under the action of the granular with different particle diameters were obtained based on the granule medium bulging test for bionic egg-shaped shell.Furthermore,the influence laws of particle diameter on the instability and surface quality of bionic egg-shaped shells were investigated by analyzing the wrinkles,scratches on the inner surface,external surface topographies and external surface roughness of bionic egg-shaped shells under the action of the granular with different particle diameters.The results show that with the particle diameter decreasing,the final bulging pressure of bionic egg-shaped shell increases,the instability phenomenon increases,the external surface roughness is smaller,and the overall surface quality is higher.
作者
孙志莹
施正贤
申明廷
Sun Zhiying;Shi Zhengxian;Shen Mingting(College of Mechanical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2023年第5期176-182,共7页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(52205372)
张家港市产学研预研资金项目(ZKCXY2123)
江苏省研究生科研与实践创新计划项目(SJCX22_1924)。
关键词
蛋形壳体
颗粒介质
胀形
失稳
表面质量
egg-shaped shell
granular medium
bulging
instability
surface quality
