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理想塑性及线性硬化板材弯曲成形的变薄规律 被引量:12
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作者 彭炎荣 江荧 +2 位作者 段继承 李兆飞 罗文波 《塑性工程学报》 CAS CSCD 2003年第3期22-25,共4页
在板材呈圆弧形弯曲和截面保持平面的基础上 ,对理想塑性板材和线性硬化板材的弯曲变形进行了分析 ,推导出弯曲过程中宽板外表面半径、板料厚度、变薄系数 ,以及应变中性层内移系数随板坯内表面半径变化的理论解 ,并将计算示例与查表法... 在板材呈圆弧形弯曲和截面保持平面的基础上 ,对理想塑性板材和线性硬化板材的弯曲变形进行了分析 ,推导出弯曲过程中宽板外表面半径、板料厚度、变薄系数 ,以及应变中性层内移系数随板坯内表面半径变化的理论解 ,并将计算示例与查表法的实验数据作了比较。 展开更多
关键词 板材弯曲成形 变薄 理想塑性 线性硬化
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钢板冷弯曲件展开尺寸的计算 被引量:1
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作者 范鹿明 《科技创新与应用》 2014年第28期56-57,共2页
集装箱吊具是码头港口机械进行集装箱装卸作业的重要搬运设备,此吊具设备的安全性是确保码头进行安全作业的重要保障。集装箱的主体结构是由以钢板为原材料,通过对钢板切割、冷弯曲成形、然后采用先进焊接工艺进行组装而成的钢结构设备... 集装箱吊具是码头港口机械进行集装箱装卸作业的重要搬运设备,此吊具设备的安全性是确保码头进行安全作业的重要保障。集装箱的主体结构是由以钢板为原材料,通过对钢板切割、冷弯曲成形、然后采用先进焊接工艺进行组装而成的钢结构设备。由于吊具的结构特点,此产品的好多结构型零件都是钢板的弯曲成形件,为了保证这些冷弯曲零件的板材下料时的准确性,非常有必要对这些冷弯曲件展开尺寸的计算进行科学的研究和分析,以便满足生产的需要,降低生产成本,充分提高材料的合理利用率。文章详细简述了相关弯曲零件展开尺寸的计算方法。 展开更多
关键词 集装箱吊具 板材的冷弯曲 冷弯钢板弯曲件展开下料尺寸 弯曲半径R 板材厚度T 冷弯钢板弯曲件中性层 中性层偏移量 冷弯钢板弯曲件展开下料尺寸的计算
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Forming limit of textured AZ31B magnesium alloy sheet at different temperatures 被引量:13
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作者 黄光胜 张华 +2 位作者 高孝云 宋波 张雷 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第4期836-843,共8页
Repeated unidirectional bending (RUB) was carried out to improve the texture of commercial AZ31B magnesium alloy sheets. All specimens were prepared in the rolling direction. The forming limit diagrams (FLDs) of A... Repeated unidirectional bending (RUB) was carried out to improve the texture of commercial AZ31B magnesium alloy sheets. All specimens were prepared in the rolling direction. The forming limit diagrams (FLDs) of AZ31B magnesium alloy sheet were determined experimentally by conducting stretch-forming tests at room temperature, 100, 200 and 300 ℃ Compared with the as-received sheet, the lowest limited strain of AZ31B magnesium alloy sheet with tilted texture in the FLD increased by 79% at room temperature and 104% at 100 ℃. The texture also affected the extension of the forming limit curves (FLC) in the FLD. However, the FLCs of two kinds of sheets almost overlapped at temperature above 200 ℃. It can be concluded that the reduction of (0002) texture intensity is effective to the improvement of formability not only at room temperature but also at low-and-medium temperature. The effect of texture on FLDs becomes weak with increasing temperature. 展开更多
关键词 magnesium alloy sheet repeated unidirectional bending texture FORMABILITY forming limit diagram
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Principle and theoretical analysis of continuous roll forming for three-dimensional surface parts 被引量:11
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作者 CAI ZhongYi LI MingZhe 《Science China(Technological Sciences)》 SCIE EI CAS 2013年第2期351-358,共8页
Continuous roll forming(CRF) is a novel forming process for three-dimensional surface parts,in which a pair of bendable forming rolls is used as sheet metal forming tool.By controlling the gap between the upper and lo... Continuous roll forming(CRF) is a novel forming process for three-dimensional surface parts,in which a pair of bendable forming rolls is used as sheet metal forming tool.By controlling the gap between the upper and lower forming rolls,sheet metal is non-uniformly extended in the longitudinal direction while it is bent in the transverse direction during the rolling process.As a result,longitudinal bending is gained and a doubly curved surface is formed.With the rotations of the forming rolls,the sheet metal is deformed consecutively,and a three-dimensional surface part is shaped continuously.In this paper,the mechanism of the three-dimensional surface formation in CRF is set forth.Through theoretical analysis of the CRF process,the governing equations for the bending deformation in rolling process are presented.Based on the simplification on the deformation and material model,the formulation to calculate the longitudinal bending deformation is derived,and the methods to design the compression ratio and the roll gap are given,the effects of compression ratio of rolling and the width of blank sheet on the longitudinal bending curvature are analyzed.The forming experiments on typical surface parts and measured results show that forming results with good precision can be obtained by CRF process. 展开更多
关键词 sheet metal continuous forming bended roll ROLLING curved surface
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