微热管绕弯工艺褶皱缺陷的实验研究  

Experimental Study of Wrinkling in the Process of Pure Rolling Rotary Draw Bending

作　　者：陈举聪[1] 李勇[1] 王修坤[1] 曾志新[1] 陈创新 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]广东新创意科技有限公司,广东广州510610

出　　处：《机械设计与制造》2013年第3期66-69,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(50975096);广东省自然科学基金项目(S2011010002225);广东省科技计划项目(2011B040300020;2010A011300022;2010A080802009)

摘　　要：为研究微热管弯曲过程中褶皱缺陷的变化规律,以制定合理的弯曲工艺方案。采用实验研究的方法,分析了纯滚动式绕弯工艺中各参数对微热管弯曲过程中管壁内侧褶皱的影响规律。实验结果表明:微热管的相对弯曲半径越大、管材的材料热处理温度越低,弯曲时的褶皱越小;随着管径的增大,弯曲后褶皱先变大后减小;随着弯曲角速度的增大、管壁与中心模具间摩擦系数的提高,弯曲后褶皱先变小后变大。且提出一种多道弯曲的工艺,以对弯曲褶皱进行改善。In order to study the wrinkling variation of micro heat pipe in the bending process and develop a reasonable bending process,an experimental method was utilized to analyze the effect of the various parameters to the wrinkling in the pure rolling rotary draw bending process.The experimental results show that the bigger the relative bending radius,the lower heat treatment temperature of the materials,and the smaller the bending wrinkling.As the diameter increases,the bending wrinkling firstly increases and then decreases;and the bending velocity and the friction coefficient between the pipe and the center mold plays an opposite role on the bending wrinkling.In addition,it proposes a process of multi-bending to improve the bending wrinkling.

关 键 词：纯滚动 绕弯 微热管 褶皱 

分 类 号：TH16[机械工程—机械制造及自动化] TG3[金属学及工艺—金属压力加工]