摘要
为探究TA1纯钛薄板在聚氨酯软模微成形中的摩擦规律及其尺寸效应机理,采用自主研发的滑动摩擦实验平台,系统研究了法向压力、滑动速度和试样宽度对摩擦因数的影响,并基于“开放-封闭”润滑模型构建了多因素耦合摩擦因数预测模型。实验结果表明,蓖麻油润滑下摩擦因数随法向压力和滑动速度增大而减小。模型拟合结果显示,考虑尺寸效应、法向压力及滑动速度的耦合模型理论值与实验值最大误差为3.8%,验证了所构建模型的合理性。本研究揭示了聚氨酯软模微成形中压力-速度耦合作用下的摩擦尺寸效应机理,为工艺参数优化及摩擦建模提供了理论依据。
To investigate the frictional law and size effect mechanism of TA1 pure titanium thin sheet in polyurethane flexible mold microforming,a custom-built sliding friction testing platform was employed to systematically analyze the influences of normal pressure,sliding speed,and specimen width on the friction factor.A multi-factor coupled friction factor prediction model was developed based on the[DK]"open-closed[DK]"lubrication theory.Experimental results demonstrate that under castor oil lubrication,the friction factor decreases with increasing normal pressure and sliding speed.Model fitting results indicate that the maximum error between the theoretical values of the coupled model incorporating size effect,normal pressure,and sliding speed and the experimental data is 3.8%,which validates the reliability of the proposed model.This study uncovers the underlying mechanism of friction size effect under the combined action of pressure and velocity in polyurethane flexible mold microforming,thereby providing a theoretical foundation for process parameter optimization and frictional modeling.
作者
王传杰
梁晨
王守德
陈刚
王海洋
WANG Chuan-jie;LIANG Chen;WANG Shou-de;CHEN Gang;WANG Hai-yang(School of Materials Science and Engineering,Harbin Institute of Technology(Weihai),Weihai 264209,China;Key Laboratory for Micro-system and Micro-structure Manufacturing of Ministry of Education,Harbin Institute of Technology,Harbin 150080,China)
出处
《塑性工程学报》
2026年第4期187-194,共8页
Journal of Plasticity Engineering
基金
中央高校基本科研业务费资助项目(HIT.OCEF.2024032)
山东省高等学校青年创新团队发展计划(2022KJ078)。
关键词
摩擦行为
软模微成形
TA1纯钛薄板
尺寸效应
frictional behavior
flexible mold microforming
TA1 pure titanium thin sheet
size effect
