基于超声检测不同联拉工艺下TP2铜管的轴向壁厚均匀性  

Axial wall thickness uniformity of TP2 copper tube under different joint drawing processes based on ultrasonic testing

作　　者：岳峰丽[1] 沙琢 陈大勇[2,3] 孙红运 刘劲松 陈传来[3] 王辉 Yue Fengli;Sha Zhuo;Chen Dayong;Sun Hongyun;Liu Jinsong;Chen Chuanlai;Wang Hui(School of Automotive and Transportation,Shenyang Ligong University,Shenyang 110159,China;Shi Changxu Materials Innovation Center,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Changzhou Enreach Copper Co.,Ltd.,Changzhou 213149,China)

机构地区：[1]沈阳理工大学汽车与交通学院,辽宁沈阳110159 [2]中国科学院金属研究所师昌绪材料创新中心,辽宁沈阳110016 [3]常州润来科技有限公司,江苏常州213149

出　　处：《锻压技术》2024年第9期57-67,共11页Forging & Stamping Technology

基　　金：2022年度辽宁省教育厅基本科研项目(LJKMZ20220591);常州市领军型创新人才引进培育项目(CQ20220057)。

摘　　要：铜管铸坯经三辊行星旋轧后,管坯轴向壁厚存在不均匀现象,影响联合拉拔管坯的壁厚均匀性。针对此问题,首先基于超声检测原理,自主研发了轧后在线超声检测新型设备,开展了TP2铜管壁厚在线测量试验。在此基础上,利用试验数据建立联合拉拔铜管管坯的几何模型。其次,采用有限元模拟,分析不同联拉工艺对联拉后铜管壁厚均匀性的影响,并建立了铜管轴向壁厚均匀性的评价公式。研究结果表明:初始管材壁厚不均匀度会提高拉拔过程中拉拔力的波动,增大芯头轴向位移的距离;适当增加壁厚减薄率可以改善游动芯头拉拔后铜管轴向壁厚的不均匀度;随着壁厚减薄率的增加,拉拔过程中的径向应力及游动芯头位移的波动越大。该研究对游动芯头拉拔工艺中管材的轴向壁厚均匀性调控具有指导及借鉴意义。After the three-roll planetary rotary rolling of copper tube billet,there is an uneven phenomenon in the axial wall thickness of tube billet,which affects the wall thickness uniformity of tube billet by joint drawing.Therefore,in response to this problem,based on the principle of ultrasonic testing,a new type of online ultrasonic testing equipment after rolling was developed independently,and the online measurement experiment for the wall thickness of TP2 copper tube was conducted.Then,based on these experiments,a geometric model of copper tube billet by joint drawing was established by experimental data.Furthermore,the finite element simulation was used to analyze the influence of different joint drawing processes on the wall thickness uniformity of copper tube after joint drawing,and an evaluation formula for the axial wall thickness uniformity of copper tube was established.The research results indicate that the unevenness of initial tube wall thickness increases the fluctuation of drawing force during the drawing process and increases the distance of axial displacement of core head.Appropriately increasing the wall thickness reduction rate can improve the unevenness of axial wall thickness for copper tube after the moving core head is drawn.As the wall thickness reduction rate increases,the fluctuations in radial stress and displacement of moving core head during the drawing process become greater,which has guiding and reference significance for regulating the axial wall thickness uniformity of tubes in the drawing process of moving core head.

关 键 词：TP2铜管 联合拉拔 超声检测 壁厚不均匀性 壁厚减薄率 

分 类 号：TG146.1[一般工业技术—材料科学与工程]