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金属波纹管内旋压增量成形过程材料变形特性研究
英文标题:Investigation on deformation characteristics of internal spinning incremental forming process for metal corrugated tubes
作者:石珣 李言 杨明顺 姚梓萌 侯晓莉 袁启龙 姜飞龙 
单位:西安理工大学 
关键词:旋压 增量成形 金属波纹管 材料变形 ABAQUS/Explicit 
分类号:TG376.9
出版年,卷(期):页码:2018,43(2):0-0
摘要:

 将增量成形技术与管旋压成形工艺相结合,进行金属波纹管内旋压增量成形。为了获得成形区域材料的变化规律,建立基于ABAQUS/Explicit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。搭建了管内旋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壁厚度变化分布,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。

 The internal spinning incremental forming technology for metal corrugated tubes was carried out by combining incremental forming technology with tube spinning forming process. Then, the finite element model of internal spinning incremental forming for metal corrugated 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 internal spinning incremental forming for metal corrugated tubes was built, the experiments of incremental forming for metal corrugated tube were conducted, and the thickness variation of tube wall in the forming region was measured and analyzed along the thickness direction,which verified the correctness of the finite element numerical model and the theoretical calculation results. Finally, the experiment of incremental forming multi corrugations was repeated to verify the reliability of forming process. Thus, the change rules of surface microstructure for tube wall in deformation region shows that the plastic strain of material in the transition region of arc and the tensile region of inclined plane is large, in which the tube wall is prone to produce excessive deformation and crack,and then the forming quality and precision of tube are affected.

基金项目:
国家自然科学基金资助项目(51475366,51475146)
作者简介:
作者简介:石珣(1990-),男,硕士研究生 E-mail:18109234315@163.com 通讯作者:李言(1960-),男,博士,教授,博士生导师 E-mail:18729380286@163.com
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