超声振动对微盒形件拉深高度及断口质量的影响  

Effects of Ultrasonic Vibration on Drawing Height and Fracture Quality at Corners of Micro-square Cup

作　　者：查长礼[1] 陈炜[1] ZHA Changli CHEN Wei(School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013)

机构地区：[1]江苏大学机械工程学院,镇江212013

出　　处：《中国机械工程》2017年第5期603-606,共4页China Mechanical Engineering

基　　金：高等学校博士学科点专项科研基金资助项目(20133227110013)

摘　　要：构建了一种基于超声振动的SUS304薄板成形试验装置以研究微盒形件的拉深性能,探究了不同的试样厚度、模具及振幅对微盒形件拉深高度与断口质量的影响,并引入归一化比例系数λ,分析了三种模具对应的试样成形时对超声振动的敏感性。结果表明:在加载超声振动时,厚度为40μm、100μm和200μm三种试样对应的最大拉深高度分别由0.19 mm、0.30 mm和0.79 mm提高至0.24mm、0.44mm和1.10mm;在无振动方式下拉深微盒形件至破裂时拐角处的断口呈撕裂状、凹凸不平,而随着振幅的增大,断口趋向平坦;2号模具对超声振动的敏感性高于另外两种模具。A 3U3304 sheet metal forming experiment set-up was designed to investigate the draw-ing formability of micro - square cup based on ultrasonic vibrations. Effects of the drawing height and fracture quality at the corners of the micro-square cup were researched with various sample thicknes- ses, molds and vibration amplitudes. And the normalized ratio coefficient λwas introduced to analysis the sensitivity of three kinds of mold to the ultrasonic vibration in drawing. Results show that using vibration following the deep drawing processes the height is increased from 0.19 mm to 0.24 mm, from 0.30 mm to 0.44 mm, and from 0.79 mm to 1.10 mm for thickness of 40μm, 100μm and 200μm, respectively. The fractures at the corners of the micro-square cup present tears and irregulars in the absence of ultrasonic vibration conditions, and with the increasing of vibration amplitudes, the fractures become flatter. It is observed that the more sensitivity of No.2 mold to ultrasonic vibration is stronger than that of the other two types.

关 键 词：超声振动 微盒形件 拉深高度 断口 

分 类 号：TG301[金属学及工艺—金属压力加工]