锻压技术

7075铝合金温成形过程中摩擦规律研究及有限元仿真分析

英文标题：Friction law study and finite element simulation analysis on 7075 aluminum alloy during warm forming process

分类号：TG155.5

出版年,卷(期):页码：2024,49(4):194-201

摘要：

采用自主设计的高温摩擦试验机，研究了7075铝合金在边界润滑条件下的摩擦规律，建立不同温度下的变摩擦因数模型，并分析了各温度下的摩擦形貌，通过Abaqus有限元仿真和实际冲压验证变摩擦因数模型的准确性。研究结果表明：在边界润滑条件下，试验温度从100 ℃升高至300 ℃时，摩擦因数随着试验温度的增大而升高；在100～200 ℃时，摩擦因数相对稳定；在200～300 ℃时，摩擦因数随着滑动时间的增加，先增大后减小然后趋于稳定；在300 ℃时，7075铝合金表面犁沟的磨损效果显著；当采用变摩擦因数模型时，铝合金的模拟成形效果更能接近实际的成形效果，有效提高了软件的模拟精度。

The friction laws of 7075 aluminum alloy under boundary lubrication conditions was studied by the self-designed high temperature friction testing machine, and the variable friction factor model at different temperatures was established. Then, the friction morphology at different temperatures was analyzed, and the accuracy of the variable friction factor model was verified by Abaqus finite element simulation and actual stamping. The research results show that when the test temperature increased from 100 ℃ to 300 ℃ under the boundary lubrication condition, the friction factor increases with the increasing of test temperature. At 100-200 ℃, the friction factor is relatively stable. At 200-300 ℃, the friction factor increases first, then decreases and then becomes stable with the increasing of sliding time. The furrow wear effect on 7075 aluminum alloy surface is obvious at 300 ℃. When the variable friction factor model is used, the simulated forming effect of aluminum alloy is closer to the actual forming effect, and the simulation accuracy of software is improved effectively.

基金项目：

国家自然科学基金资助项目（51505408）；江苏省产学研前瞻性联合研究项目（BY2022174）

作者简介：朱云飞（1998-），男，硕士研究生 E-mail：1970770483@qq.com 通信作者：夏建生（1980-），男，博士，教授 E-mail：Xiajiansheng@163.com

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