改善焊接接头疲劳强度的超声冲击装置  

Ultrasonic Peening Equipment Used for Improring Fatigue Strength of Welded Joints

作　　者：王东坡[1] 霍立兴[1] 蔡国余[1] 张玉凤[1] 

机构地区：[1]天津大学,天津300072

出　　处：《焊接学报》2000年第2期32-35,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金!( 5 95 75 0 61)

摘　　要：使用超声波冲击焊趾来提高焊接接头及结构的疲劳强度 ,是一种国际上刚刚出现的新方法。本文对超声冲击方法的试验装置进行了研究。研制成功了一台可以用于实际冲击处理的样机。该装置配有自行研制成功的适用于压电超声冲击处理设备的专用超声波电源。首次将压电式陶瓷换能器引入超声冲击装置 ;提出了控制执行机构的输出端振幅 ,使之恒定不变 ,对超声冲击处理质量进行控制的思想 ;成功地对超声冲击处理这种负载变化极其剧烈的工作方式实现了准确的频率跟踪 ,保证了超声冲击处理质量和效率及系统安全工作。It's a new method to increase fatigue strength of welded joints and structure by peening toe of weld with ultrasonic peening equipment.In thes paperwe have researched the ultrasonic peening equipment and a vew ultrasonic peening prototype was manufactured.The prototype was fitted with the ultrasonic power supply which can be used specially for ultrasonic peening equipment of the kind of piezoelectric ceramics.The new idea has been held out to keep the output amplitude in constant so as to control the quality of ultrasonic peening.Accurate frequency tracing has not only been realized successfully under the situation that the peening load varies strongly,but the quality and efficiency of the ultrasonic peening and safety of the equipment system has been ensured as well.

关 键 词：疲劳强度 焊接接头 超声波冲击装置 

分 类 号：TG404[金属学及工艺—焊接] TG405