第43卷第2期 Vol. 43No. 2
假压技
FORGING & STAMPING TECHNOLOGY
金属波纹管内旋压增量成形过程材料变形特性研究石珂，李言，杨明顺，姚梓萌，侯晓莉，袁启龙，姜飞龙
（西安理工大学机械与精密仪器工程学院，陕西西安710048）
2018年2月 Feb.2018
立基于ABAQUS/Explieit的金属波纹管内旋压增量成形有限元模型，分析了成形过程中材料的厚度减薄和扭转变化特点。搭建了管内能压增量成形实验平台，进行增量成形金属波纹管实验，沿厚度方向测量管件成形区域管暨厚度变化分布，对获得的厚度变化进行数据分析，验证有限元数值模型和理论计算结果的正确性，并通过重复进行增量成形多个波纹实验，验证了成形工艺的可靠性。通过分析管壁变形区材料表面微观组织变化规律表明：圆弧过渡区和斜面拉伸区材料的塑性应变大，在该区域管壁容易发生过度减薄和断裂，从而影响成形质量和精度
关键词：旋压；增量成形；金属波纹管；材料变形；ABAQUS/Explieit DOI: 10. 13330/j. issn. 1000-3940. 2018. 02. 011
中图分类号：TG376.9
文献标识码：A
文章编号：1000-3940（2018）02-0055-07
deformation characteristics of internal spinning incrementa
Investigation on
forming process for metal corrugated tubes
Shi Xun, Li Yan, Yang Mingshun, Yao Zimeng, Hou Xiaoli, Yuan Qilong, Jiang Feilong
( School of Mechanical and Precision Instrument Engineering , Xi'an University of Technology , Xi'an 710048, China)
Abstract : The internal spinning incremental forming technology for metal cougated tubes was carried out by combining incremental form-ing technology with tube spinning forming process. Then, the finite element model of intemal spinning incremental forming for metal corru gated tubes based on ABAQUS/Explicit was established in order to obtain the change rules of material in the forming region, and the thickness reduction and torsional variation of material were analyzed in the forming process. Furthermore, the experimental platform of in-
ternal spinning incremental forming for metal corugated tube
were conlucted, and the thickness
s built, the experiments of incremental forming for metal corrugated tube
variation of tube wall in the forming region
asured and analyzed along the thickness direction,
which verified the comectness of the finite element numerical model and the theoretical calculation results. Finally , the experiment of in-cremental forming multi corrugations was repeated to verify the reliability of forming process. Thus, the change rules of surface microstruc ture for tube wall in defomation region shows that the plastic strain of material in the transition region of arc and the tensile region of in-clined plane is large, in which the tube wall is prone to produce excessive deformation and crack, and then the forming quality and preci-sion of tube are affected.
Key words : spinning; incremental forming; metal corrugated tubes; material deformation; ABAQUS/Explieit
管类零件与机械加工件、铸件、锻件相比具有质量轻、节省工序和工时、强度硬度高、成形性能好等特点，在航空航天、石油化工、船舶、热能等工业领域应用广泛，并且在当代工业生产中占有极其重要的地位[1-2]。管类零件加工方法是对管料毛
收稿日期：20170907；修订日期：20171207
基金项目：国家自然科学基金资助项目（51475366，51475146）
作者简介：石均（1990-），男，额土研究生 E-mail: 18109234315@ 163. com
通讯作者：李言（1960-），男，博士，教授，博士生导师万方整据il：18729380286@163.com
坏进行机械成形、液压成形、焊接成形后得到所需工艺要求的管类零件。其中，机械成形具有成形模具简单、成形效率高等特点，
但也存在成形表面粗
糙度高、成形深度浅等缺陷；液压成形具有圆度高、回弹变形小等优点，但也存在易皱折、能耗高等缺陷；焊接成形具有良好的力学性能、并可获得较高的技术经济效果等优点，不足是容易出现未焊透、焊接应力和变形等缺陷[3]
目前，已有学者进行了将增量成形技术与管成形相结合的工艺研究。TeramaeT等[+]进行了管壁无模增量翻孔成形分支管研究，无模增量翻孔成形是
特种成形栏目是由北京机电研究所有限公司①费助刊出