Frictional characteristics of sheet metals with superimposed ultrasonic vibrations

作     者：CAO Miao-yan LI Jian-chao LIU Yan-yang YUAN Ya-ning ZHAO Chang-cai DONG Guo-jiang 曹秒艳;李建超;刘艳阳;苑亚宁;赵长财;董国疆

作者机构：National Engineering Research Center for Equipment and Technology of Cold Strip RollingYanshan UniversityQinhuangdao 066004China Chinese Academy of Agricultural Mechanization SciencesBeijing 100083China Key Laboratory of Advanced Forging&Stamping Technology and Science of Ministry of Education of ChinaYanshan UniversityQinhuangdao 066004China College of Vehicles and EnergyYanshan UniversityQinhuangdao 066004China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2018年第25卷第8期

页      面：1879-1887页

核心收录：

学科分类：0810[工学-信息与通信工程] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Projects(51775480,51305385)supported by the National Natural Science Foundation of China Project(E2018203143)supported by the Natural Science Foundation of Hebei Province,China 

主　　题：friction ultrasonic vibrations sheet metals contact model 

摘      要：The forming performance of sheet metals in the deep-drawing process with ultrasonic vibrations can be improved by the surface effect between the sheet metal and the die.A sheet metal friction test with ultrasonic vibrations is performed to explore the cause of the surface *** frictional characteristics are investigated,and the corresponding friction expressions are established based on the contact mechanics and the elastic–plastic contact model for rough *** is caused by the elastic–plastic deformation of contacting asperities under normal *** actual contacting region between two surfaces increases with normal loads,whereas the normal distance *** normal distance between the contacting surfaces is changed,asperities generate a tangential deformation with ultrasonic vibrations,and the friction coefficient is eventually *** vibrations are applied on a 40Cr steel punch at the frequency of 20 kHz and the amplitude of 4.2μ*** the friction tests,the punch is perpendicular to the surface of the magnesium alloy AZ31B sheet metals and is sliding with a relative velocity of 1 mm/*** test results show that the friction coefficient is decreased by approximately 40%and the theoretical values are in accordance with the test values;Ultrasonic vibrations can clearly reduce wear and improve the surface quality of parts.