PEI板材粘性介质温热胀形试验及变形规律研究  

Investigation on Deformation Law and Viscous Warm Pressure Bulging Experiment of PEI Sheet

作　　者：高铁军[1] 刘青[1] 许梦龙 吕阳杰 LAO Tie-jun1,LIU Qing1,XU Meng-long2, LV Yang-jie1(1.Faculty of Aerospace Engineering, Shenyang Aerospace University, Liaoning Shenyang 110136, China;2.Beijing Spacecrafts, Beijing 100094, Chin)

机构地区：[1]沈阳航空航天大学航空航天工程学部,辽宁沈阳110136 [2]北京卫星制造厂,北京100094

出　　处：《机械设计与制造》2018年第8期95-97,共3页Machinery Design & Manufacture

基　　金：国家自然科学基金(51205260);航空科学基金(2014ZE54024)

摘　　要：针对小批量、复杂形状的薄壁聚醚酰亚胺(PEI)制件提出了采用粘性介质温热成形的方法进行此类零件的成形,以达到降低生产成本、缩短产品研制周期的目的。通过PEI板材的拉伸实验和粘性介质温热胀形试验,研究了不同温度条件下的PEI板材力学性能及其变形规律。研究结果表明:PEI板材在(20~150)℃范围内,随着温度的升高,成形性能逐渐提高;PEI粘性介质温热胀形试件的最大壁厚减薄率在胀形试件中心呈现区域性分布,最大壁厚减薄率区域面积随着变形温度的升高而增大;此外,相比于单向应力状态,PEI板材在双向应力状态下具有更好的成形性能,并且PEI板材的形变没有对零件表面光泽和透光率造成影响。A viscous warm pressure forming method is proposed to reduce the cost and shorten the development cycle in small batch for complex shape thin-walled parts of polyetherimide（PEI）. The tensile test and viscous warm pressure bulging experiment were carried out to investigate the mechanical property and deformation law of PEI sheet. The results show that with the temperature increasing,the formability of PEI sheet increases from 20℃ to 150℃. The maximum wall thickness reduction rate of viscous warm pressure bulging specimen presents regional distribution which locates at the center of the bulging specimen,and with the temperature increasing,the area of regional distribution increases. Furthermore, the formability of PEI sheet is greater in biaxial stress state than that in uniaxial stress state. The surface finish and light transmittance of specimen are not influenced by the deformation of PEI sheet.

关 键 词：PEI板材 粘性介质温热胀形 壁厚减薄率 成形性能 

分 类 号：TH16[机械工程—机械制造及自动化] TG302[金属学及工艺—金属压力加工]