Process optimization and causes analysis on "sand hole" defect of automobile sheet with ultra-deep drawing
JIANG Limei, LIU Suli, HAN Chuangchuang, CAO Xiaoen, CHENG Di
China Metallurgy . 2024, (10): 108 -117 .  DOI: 10.13228/j.boyuan.issn1006-9356.20240260