摘要
为了研究钢球表面缺陷检测设备中钢球在展开机构中的接触碰撞特性,从钢球螺旋线展开机构的原理入手,基于Hertz理论建立钢球与核心零件展开轮的接触碰撞模型,以ADAMS二次开发为平台进行求解,同时与Impact模型进行对比验证.在此基础上,通过观察不同压紧力下侧偏力的变化过程以及钢球与展开轮两侧接触点处侧偏力对比情况,探讨球面展开过程的接触碰撞特性.结果表明:侧偏力以正弦曲线规律进行周期性变化,带动钢球产生方向交替变化的侧偏运动,同时压紧力大于15N时,检测系统达到稳定状态,压紧力对侧偏力的周期、幅值以及钢球进入稳态的时间影响可以忽略不计.从接触力角度揭示了球面展开原理,为检测设备的设计提供了理论依据.
In order to analyze the contact-impact characteristic of steel ball on steel ball surface defect detection equipment,from whose principle the contact collision model between steel ball and core part unfolding wheel is established based on Hertz theory,which is solved through secondary development of ADAMS and compared with Impact model. Then,by observing the changes of cornering force under different pressing force and comparison of corning forces from two contact points between steel ball and unfolding wheel,the contact-impact characteristic of spherical expansion process is discussed. The results show that cornering force changes with periodic sine curve principle,driving the steel ball cornering motion with alternant and changing direction. At the same time,when the pressing force is greater than 15 N,the detection system reaches to the steady state,and the pressing force＇s influence on the period,amplitude of cornering force and the time of the ball into the steady time can be neglected.Spherical unfolding principle is revealed from aspect of contact force,providing theoretical foundation for design of detection equipment.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2015年第6期37-41,共5页
Journal of Harbin University of Science and Technology
基金
国家自然科学基金(51275140)
