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锥形方管无模拉伸断面形状变化的实验

DOI: 10.3969/j.issn.1005-3026.2015.03.015, PP. 368-371

Keywords: 无模拉伸,锥形方管,锥管角精度,断面形状膨胀率,变形区宽度

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Abstract:

对锥形方管进行无模拉伸基础实验研究.探讨各种工艺参数对锥形方管外形、断面形状和锥度变化的影响,分析方管无模拉伸时断面圆化程度的影响因素及影响规律,并提出减轻断面圆化程度的具体方法.研究结果表明,采用无模拉伸的方法可以加工带有一定锥度的锥形方管,锥管角精度在1.0%以内,加工后锥形方管的轮廓与控制曲线的计算结果一致性很好;方管拉伸断面形状膨胀率随着拉伸变形区宽度增大而减小;壁厚较大,断面形状膨胀率较小,当壁厚和变形区宽度都比较大时,几乎不产生膨胀现象.

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