摘要
随着小型精密零件的广泛应用,消除小型零件的残余应力成为一个重要研究课题。本文提出了采用超声振动对小型零件时效处理。讨论了超声振动时效技术消除残余应力的机理。提出在时效过程中激振应力与工件残余应力之和大于材料疲劳极限时,即可对残余应力有消除作用。建立了圆截面杆件的残余应力计算模型。试验研究了激振应力和激振时间对消除构件残余应力效果的影响。结果表明,最佳激振时间为10min^15min,工件内残余应力消除率随着振幅的增大而增加。
It has become an important research subject to eliminate the residual stress with the widely application of tiny precision parts. The aging treatment of small parts using ultrasonic vibration was proposed. The mechanism of using ultrasonic vibration to eliminate residual stress was discussed, and it＇s effective to eliminate the residual stress if the sum of the vibration stress and residual stress is greater than the material＇s fatigue limit. The residual stress model of the circular cross section bar was established. The influences of the vibration stress and vibration time on the effect of eliminating residual stress were studied by experiment. The optimal vibration time is 10min - 15min, and the eliminating rate of the residual stress in the work piece increases with the increase of amplitude.
出处
《中国农机化学报》
2015年第2期59-62,共4页
Journal of Chinese Agricultural Mechanization
基金
山西省工业科技攻关计划项目(20080321048)
关键词
超声振动时效
激振应力
激振时间
残余应力
ultrasonic vibratory aging
vibration stress
vibration time
residual stress
