5083铝合金板料成形性能实验装置设计
首发时间:2012-11-21
摘要:近年来,由于密度小、比强度高及加工性能好等特点,铝合金冲压件取得非常广泛的应用。与钢材相比,铝合金板料在常温下塑性较低,因此研究铝合金板料的成形性能对铝合金冲压件的生产具有重要的指导作用。为了获得5083铝合金板料的冲压成形性能,本文基于GBT 24171.2-2009 (ISO- 12004-1:2008) 标准和现有实验设备,设计了Nakajima双向拉伸实验装置(模具结构等)和相应的试样形状尺寸,并确定了实验的工艺方案、变形应变的测量方法以及发生塑性失稳临界数据的处理方法。通过一系列后续的实验工作,将确定0.8mm和1.0mm厚5083铝合金板的成形极限曲线。
关键词: 材料加工工程 Nakajima实验 成形极限图
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Design of Die Structure for Determination of Forming Limit of Aluminum Alloy Sheets
Abstract:IIn recent years, due to its good characterics of small density, high specific strength and good processing performance, aluminum alloy stampings have been widely used in many fields. Compared with steel, however, the formability of aluminum alloy sheets is low, so it is necessary to investigate its formability and provides the guidance for practical production. In order to obtain the formability of 5083 aluminum alloy sheets, based on standards of GBT 24171.2-2009 (ISO - 12004-1:08) and the existing experimental equipments, the device of Nakajima test (die structure, etc.) and the corresponding specimen's geometry and size have been designed in this paper. In addition, the experimental process scheme, deformation strain measurement method and the data processing methods for plastic necking have been determined too. Through a series of following experimental work, the forming limit curves (FLCs) of 5083 aluminum alloy sheets with thickness of 0.8 mm and 1.0 mm will be determined.
Keywords: Material processing Nakajima test Forming Limit Diagram (FLD)
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