铆钉铆接工艺的优化

Optimization of Riveting Process of Rivets

无头铆钉具有钉杆成形均匀、连接结构疲劳寿命高等优点,在高速铁路接触网零部件中得到了推广应用。本文针对无头铆钉铆接成形过程中的质量控制问题,通过Deform-3D数值模拟研究铆接压下量对翻边直径、窜动量的影响规律,分析其切向应力分布情况,并结合冲铆、残余应力试验对铆接压下量进行了优化,确保铆钉的铆接质量。

The headless rivets,featuring of advantages of uniformly forming of rivet shanks,higher structural fatigue service life,are commonly served as the fittings of OCS for high speed railways.The paper presents the issues for quality control of riveting process for headless rivet,studies the regularities influencing of flanging diameter and amount of play caused by the riveting rolling reduction by means of Deform-3D simulation,analyzes the distribution of its tangential stress;the optimization has been made for rolling reduction of riveting with connection of tests of punching,riveting and residual stress so as to guarantee the riveting quality of rivets.