锻压技术

预胀压力对轧制差厚板筒形件充液拉深成形的影响

英文标题：Influence of pre-bulging pressure on hydraulic deep drawing for cylindrical part of tailor rolled blank

作者：张华伟1 2 李渊2 吴佳璐1 2 王新刚1 2

分类号：TG386.3

出版年,卷(期):页码：2021,46(10):83-87

摘要：

为了进一步提高轧制差厚板的成形性能，将充液拉深工艺引入轧制差厚板的成形中，并重点考虑预胀形工艺的影响。通过数值模拟技术对轧制差厚板筒形件充液拉深成形过程进行了研究，确定了合理的液体压力加载路径，讨论了不同预胀压力作用下轧制差厚板的厚度过渡区的偏移以及厚度减薄情况，最终得到合适的预胀压力数值。研究认为：随着预胀压力的增大，轧制差厚板的最大厚度减薄率呈现先减小后增大的趋势，厚度过渡区偏移量则呈现不断减小的趋势；预胀压力为1.00 MPa时，能够获取较小的最大厚度减薄率，并将厚度过渡区偏移量抑制在较低的水平，从而改善轧制差厚板的成形性能。

Hydraulic deep drawing technology was introduced into the forming of tailor rolled blank (TRB) in order to further improve the formability of TRB, and the main focus was placed on the effect of pre-bulging process. Then, the hydraulic deep drawing process for cylindrical part of TRB was studied by the numerical simulation technology, and the reasonable loading path of liquid pressure was determined. Furthermore, the thickness transition zone movement and the thickness thinning of TRB under different pre-bulging pressures were discussed, and the proper pre-bulging pressure values were obtained. The results indicate that as the pre-bulging pressure increases, the maximum thickness thinning rate of TRB shows the trend of decreasing first and then increasing, and the movement amount of thickness transition zone presents the trend of gradually decreasing. When the pre-bulging pressure is 1.00 MPa, the smaller maximum thickness thinning rate is achieved, and the movement amount of thickness transition zone is restricted to a lower level to improve the formability of TRB.

基金项目：

国家自然科学基金资助项目(51475086)；河北省自然科学基金资助项目(E2016501118)；河北省高等学校科学技术研究重点项目(ZD2017315)；中央高校基本科研业务费项目(N172304036)；广东石油化工学院校级科研基金项目(2020rc020)

作者简介：张华伟(1983-)，男，博士，副教授 E-mail：zhanghw@neuq.edu.cn

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