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摘要：
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针对薄壁小半径弯曲管生产过程中易出现的变薄、断裂、起皱等难点,运用中性层偏移理论对弯管受力与变形特点进行分析,采用内胀推弯的工艺生产1Cr18Ni9Ti薄壁小半径弯曲管,并对生产原理、工艺、模具设计作了介绍。实践结果表明,该工艺很好地解决了小半径弯管外壁减薄、断裂等问题,对生产实际具有一定的借鉴意义和参考价值。
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On the basis of neutral layer migration theory,force and forming situations were analyzed in bending tubes.Bulging and trust bending process was adopted to manufacture small radius thin-wall 1Cr18Ni9Ti tube to overcome the difficulties,such as thinning,fracturing and wrinkling which always occurred in bending.The principles of this process were introduced,and the structure of bending die was designed.The result shows that the process solves the problems well and it has great reference values for tube manufacturing.
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基金项目：
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贵州科学技术基金资助项目(黔科合J字[2008]2040号);;
贵州师范大学青年科技基金资助项目(2007-1-11)
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作者简介：
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参考文献：
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[1]武世勇,石伟,刘庄.缠绕式弯管工艺对管壁厚度影响的数值分析[J].锻压技术,2002,27(1):35-38.
[2]岳永保,杨合,詹梅,等.薄壁管小弯曲半径数控弯曲壁厚减薄实验研究[J].锻压技术,2007,32(1):58-62.
[3]王孝培.冲压手册[M].修订本.北京:机械工业出版社,1990.
[4]DG1103-1999锅炉管子制造技术条件[S].
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