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采用ST16钢板，以直径为Φ200 mm、厚径比为0.5%的球形薄壁曲面件作为研究对象，通过数值模拟和工艺实验研究了拉延筋与压边力耦合作用下薄壁曲面件的起皱规律。结果表明，无拉延筋时需要4 MPa的压边力才能抑制起皱缺陷；使用拉延筋时仅需1 MPa压边力即可抑制起皱，通过设置拉延筋可以大幅降低压边力。大的拉延筋中心距更利于抑制起皱，但会加重壁厚减薄。选择合适的拉延筋中心距可以在抑制起皱的同时调控壁厚均匀性，最终实验试件的最大壁厚减薄率仅为10.4%。
Abstract：Using ST16 steel sheet, taking the spherical curved shell with the diameter of Φ200 mm and thickness diameter ratio of 0.5% as the research object, the wrinkling law of curved shell under the coupling action of draw bead and blank holder force was studied by numerical simulation and technological experiments. The results show that blank holder force of 4 MPa is required to suppress wrinkling without draw bead, and blank holder force of 1 MPa is required to suppress wrinkling when draw bead is used. The blank holder force can be greatly reduced by setting the draw bead. Larger center distance of draw bead is more conducive to suppress wrinkling, but it can aggravate the wall thickness thinning. Choosing appropriate center distance of draw bead can control and regulate the uniformity of wall thickness while suppressing wrinkling, and the maximum wall thickness thinning rate of the final experimental specimen is only 10.4%.
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基本信息:
中图分类号:TG386
引用信息:
[1]凡晓波,孔繁宇,王旭刚,等.ST16薄壁曲面件拉深成形起皱规律[J].塑性工程学报,2023,30(02):34-40.
基金信息:
国家重点研发计划(2019YFA0708804); 中央高校基本科研业务费专项资金资助项目(DUT20ZD101)
2023-02-26
2023-02-26
2023-02-26