Jinsong LIU
,
Shihong ZHANG
,
Yuansong ZENG
,
Zhiqiang LI
,
Wei WU
,
Zhongtang WANG
,
Yi XU
,
Limei REN
材料科学技术（英文）
The basic idea and method about determination of the feature line equations and how to apply them to the numerical control of the press bending of panel skins were introduced. Research indicates that it is feasible to realize the self-adapting incremental press bending by adopting the feature line equation. The feature line equation, which is based on the database of the status of practical processes, can be adjusted in time, and the forming precision can be improved. It is important to correctly select and reasonably predict the feature line equations to enhance the accuracy of the incremental press bending based on the feature line database and algorithm. The determination of the feature line equation settles necessary data foundation for further research on the database of self-adapting incremental press bending, and it supplies a new clue for the development of self-adapting incremental press bending.
关键词:
Self-adapting
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null
,
null
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null
Maosheng LI
,
Yongnian YAN
,
Shihong ZHANG
,
Dachang KANG
材料科学技术（英文）
Nowadays, with the development of spinning processes, more and more systematic research about spinning parameters has been published. Based on these results, a routing about how to select spinning parameters has been gradually formed. However, ball spinning, due to its own features plus research lack, is still unclear about its parameter selections. In addition, some manufacture-enterprises only notice the use of this technique whereas ignore the theory creation. The optimal parameters about the ball spinning although have been released from these enterprises but in fact not a helpful theory for other researchers and producers. Focus on selecting the parameters based on the trial-and-error, this article has carried a series of experiments to study the influence on the spinning working course from those parameters, especially the peeling phenomena, and the tube diameter bulging. An optimal graph of the working angle, the axial feeding rate, and the acceptable working course is put forward. Additionally, based on the theory of the minimal reduction rate, the selection of the ball diameter is finally described. Thus, it has given the rules to get the proper parameters in ball spinning.
关键词:
Working angle
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null
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null
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Dachang KANG
,
Haobin TIAN
,
Shihong ZHANG
材料科学技术（英文）
Based on plasticity theory and physical experiments, the quantitative relationships between elongation δ obtained by uniaxial tensile test and forming limits of tensile stamping operations are given, which mainly resolves the problem that forming limits can be derived from simple tensile test. The forming limit nomogram of tensile stamping operations is also established to apply to engineering.
关键词:
Nomogram
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null
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null
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