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| 板材与管材成形性能的研究与进展 |
| Research and Development on Formability of Sheets and Tubes |
| Received:May 04, 2009 Revised:July 10, 2009 |
| DOI： |
| 中文关键词: 成形性能 应力状态 管材 增量成形 奥氏体不锈钢 |
| 英文关键词: ormability stress state tube incremental forming austenitic stainless steel |
| 基金项目: |
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| 中文摘要: |
| 介绍了塑性加工领域近年来发现的一些提高金属材料塑性变形能力的方法和机理，包括板材增量成形中拉弯伴随成形、局部接触、反复弯曲、交变加载、高静水压力等方式下引起的板材局部增塑机理；波动液压加载状态下管材液压成形能力的提高机理（有轴向进给）、AISI 304不锈钢管材的液压成形增塑机理（有、无轴向进给状态下）；AISI304管材多次拉伸/卸载状态下的增塑机理。这些增塑机理还存在于其它一些塑性加工工艺中，对其合理运用将有效提高产品成形质量和材料利用率，并减少加工道次，甚至可以产生一些新的塑性加工工艺。 |
| 英文摘要: |
| Methods and mechanisms of improvement of metal formability appeared in the field of plastic processing recent years were introduced in this paper, including the mechanisms inducing formability improvement of sheets through the methods such as bending-under-tension, local contact, repeated bending, cyclical alternating loading and high hydrostatic pressure in incremental sheet forming; the mechanisms of formability improvement of tubes in pulsating hydroforming with axial feeding; mechanisms of formability improvement of AISI 304 stainless steel tubes in pulsating hydroforming with and without axial feeding; and mechanisms of formability improvement of AISI 304 stainless steel tubes under repeated loading and unloading. These mechanisms also exist in other plastic processing technologies. The quality of products and material utilization will be effectively improved and the processing passes can be reduced with the suitable use of these mechanisms; and some new plastic processing technologies will even appear. |
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