摘要
通过工艺试验及组织性能分析,研究了变形温度、道次和减薄率、进给比对大长径比铝合金异形件旋压成形的影响,优化的特征旋压温度为370~420℃、变形道次为10~12道次、道次减薄率为20%~25%、总减薄率为35%~50%、普旋进给比为2.0~2.5 mm/r、强旋进给比为1.3~1.8 mm/r。采用上述工艺实现了大长径比异形旋压件经历1次装卡由板材直接成形,大幅提升了生产效率,同时满足构件"控形"和"控性"要求,其壁厚差≤0.2mm,内型面与理论型面单边间隙≤0.1 mm,旋压变形后抗拉强度和延伸率基本不变,而屈服强度提高10.1%。
The effect of temperature, passes, thinning rate and feed ratio on the alien piece with large aspect ratio during spinning formation was studied though processing test and analysis of microstructure and mechanical properties. The optimized conditions are as follows: characteristic temperature 370~420 °C, deformation passes 10~12, thinning rate of each pass 20%~25% and whole process 35%~50%, feed ratio of ordinary spinning 2.0~2.5 mm/r, and feed ratio of strong spinning 1.3~1.8 mm/r. It is achieved that alien piece with large aspect ratio spinning is formed directly from sheet material which undergoes only one time card loading. The process above not only improves production efficiency significantly, but also simultaneously fulfils requirements of controlling shape and properties. The wall thickness difference of alien piece with large aspect ratio is not greater than 0.2 mm, and the unilateral gap between inner profile and theoretical model is not higher than 0.1 mm. Compared to those of the original plate, the ultimate tensile strength and elongation of alien piece with large aspect ratio basically is unchanged, while the yield strength increases by 10.1%.
作者
温涛
张绪虎
阴中炜
沈正章
尹嘉明
赵磊
陈永来
Wen Tao;Zhang Xuhu;Yin Zhongwei;Shen Zhengzhang;Yin Jiaming;Zhao Lei;Chen Yonglai(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2019年第12期4074-4080,共7页
Rare Metal Materials and Engineering
关键词
大长径比
异形件
精密旋压
large aspect ratio
alien piece
netshape spinning
