锻压技术

基于不同界面摩擦的铝合金拼焊覆层板胀形性能

英文标题：Bulging performance for aluminum alloy tailor-welded cladding sheet based on different interface friction

单位：(1. 沈阳航空航天大学航空宇航学院辽宁沈阳 110136 2. 沈阳航天新光集团有限责任公司辽宁沈阳 110043)

关键词：拼焊板覆板胀形界面摩擦铝合金

分类号：TG302

出版年,卷(期):页码：2023,48(6):29-34

摘要：

针对拼焊覆层板的成形质量和极限变形能力差的问题，借助覆板对拼焊板的法向压力，并结合拼焊板材料的力学性能，提出了通过改变拼焊板各区域与覆板界面摩擦的方法，来影响拼焊板各区域的变形规律。以拼焊覆层板胀形过程为研究对象，通过理论分析、有限元仿真和实验验证相结合的方法，得到了不同界面摩擦对铝合金拼焊覆层板胀形性能的影响规律。结果表明：在拼焊板强度较大一侧增大与覆板的界面摩擦因数，并在拼焊板强度较小一侧减小与覆板的界面摩擦因数，可以有效地提高拼焊板的变形均匀性、成形质量和极限变形能力，从而为拼焊覆层板成形工艺参数的优化提供依据。

For the problems of poor forming quality and forming limit for tailor-welded cladding sheet, with the help of the normal pressure of the cladding sheet on the tailor-welded sheet, combining with the mechanical properties of the tailor-welded sheet, a method of changing the interface friction between each area of the tailor-welded sheet and the cladding sheet was proposed to affect the deformation law of each area of the tailor-welded sheet. Then, for the bulging process of tailor-welded cladding sheet, the influence laws of different interface friction on the bulging performance of aluminum alloy tailor-welded cladding sheet were investigated by the combination method of theoretical analysis, finite element simulation and experimental verification. The results indicate that increasing the interface friction coefficient between tailor-welded sheet and cladding sheet on the side of tailor-welded sheet with higher strength and decreasing the interface friction coefficient between tailor-welded sheet and cladding sheet on the side of tailor-welded sheet with lower strength can effectively improve the deformation uniformity, forming quality and forming limit of tailor-welded sheet, which provides a basis for optimizing the forming process parameters of the tailor-welded cladding sheet.

基金项目：

国家自然科学基金资助项目（52075347）；辽宁省教育厅高等学校基本科研重点项目（LJKZ0192）；辽宁省自然科学基金面上项目（2022-MS-295）

王璋（1998-），男，硕士研究生

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