朱英霞,熊杭锋,陈炜,等.异质双金属复合管的弯曲工艺研究进展[J].精密成形工程,2016,8(6):8-14.
ZHU Ying-xia,XIONG Hang-feng,CHEN Wei,et al.Research Progress for Bending Process of Dissimilar Material Bimetallic Composite Tube[J].Journal of Netshape Forming Engineering,2016,8(6):8-14. |
| 异质双金属复合管的弯曲工艺研究进展 |
| Research Progress for Bending Process of Dissimilar Material Bimetallic Composite Tube |
| 投稿时间：2016-10-25 修订日期：2016-11-10 |
| DOI：10.3969/j.issn.1674-6457.2016.06.002 |
| 中文关键词: 双金属复合管 弯曲工艺 塑性成形 |
| 英文关键词: bimetallic composite tube bending process plastic forming |
| 基金项目:国家自然科学基金（51601070）； 江苏省博士后科学基金（1501099B）；江苏大学高级人才科研启动基金（14JDG135） |
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| 中文摘要: |
| 发展异质双金属复合管的塑性弯曲成形工艺，是工业技术发展的必然趋势。目前有关双金属复合管弯曲行为的研究，大部分还属于材料性能测试性研究，只有少量文献尝试了异质双金属复合管的推弯、压弯成形工艺。研究发现：基-覆管界面分层、截面畸变和起皱是双金属复合管弯曲过程中频频出现的成形缺陷，且这三者之间存在耦合作用；可以通过合理的内腔填充（如施加一定的内压力，采用合理的芯模）来抑制双金属管的起皱行为；加载力对覆管的作用传递，容易因为界面层的存在而受到阻碍。而绕弯成形过程中作用在管坯上的力，分布均匀、加载位置合理，因此，绕弯成形适合弯曲塑性较好、对力的加载条件要求较高的异质双金属复合管件。近年来，由于弯管不仅要发挥传统的功用，还要满足设计性能、安装空间及轻量化上的要求，发展高精度小半径弯曲的异质双金属复合管弯曲成形技术，已经成为先进制造业发展的必然要求。 |
| 英文摘要: |
| Developing the process of plastic forming of dissimilar bimetallic composite tube by bending is an inevitable trend resulting from the development of industrial technology. However, most of the studies on the bending behavior of bimetallic composite tubes belong to the tests of material properties. Only a few literatures have made attempts on the push bending and press bending processes of dissimilar bimetallic composite tubes. Research showed that: the interface failure between carrier tube and liner tube, the cross section distortion and the wrinkling were the defects of bimetallic composite tube repeatedly occurring in the bending processes, and these defects had coupling constraints; the reasonable filling (such as the application of a certain internal pressure, the use of reasonable mandrel dies) could be used to suppress the wrinkling behavior of the bimetallic tube; the transmission of loading force applied on the tube was easily blocked due to the existence of the interface layer. However, the rotary-draw bending process could provide evenly distributed pressure whose loading position was also reasonable. Therefore, the rotary-draw bending was suitable to form bimetallic composite tubes with better plasticity and higher requirements of loading conditions. In recent years, the bent tubes were desired not only to exert the traditional functions, but also to meet the requirements of design performance, installation space and lightweight. Therefore, developing the high-precision and small-radius forming technology of dissimilar bimetallic composite tube by bending has become an inevitable requirement for the development of advanced manufacturing industry. |
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