A simple approach for reducing profile diverting in a single point incremental forming process
A simple approach for reducing profile diverting in a single point incremental forming process
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一种减少单点渐进成形过程中型材转向的简单方法
DOI：
10.1243/095440505x32797
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
M. Muzzupappa
中科院分区：
文献类型：
--
作者：
G. Ambrogio;L. Filice;L. Napoli;M. Muzzupappa
摘要渐进成形在工业上的应用日益广泛，特别是在小批量或单个零件的生产中。事实上，现在有足够的技术诀窍来制造简单的产品。然而，需要进一步努力减少典型的渐进成形工艺的缺点，这些缺点在成本和灵活性方面损害了重要的优势。首先，即使操作是在高速数字控制单元上进行的，过程的持续时间(通常是几分钟)也会影响这种过程。生产不精确零件的倾向会降低工业对渐进成形的兴趣。可以提出不同的方法来减少这一缺点，一个可行且易于实施的策略是设计能够同时考虑回弹效应和由于特定夹紧设备而降低刚度的修正轨迹。在本文中，这一策略是通过集成一个在线测量系统来实现的，该系统由一个数字检测仪和一个计算机数字控制(NC)开放程序组成。在特定步骤中对获得的几何图形进行采样，并且适当的例程修改未来冲压路径的坐标。这种自动控制程序是使用有效的有限元(FE)程序开发的。一个实验设计说明了所建议的方法的潜在用途。
Abstract Incremental forming applications are currently increasing in industry, especially for the production of small batches or single components. In fact, sufficient know-how is now available for the manufacture of simple products. However, further efforts are required to reduce the drawbacks of typical incremental forming processes, which compromise important advantages in terms of costs and flexibility. First of all the duration of the process, usually a few minutes, influences this kind of process, even if the operations are carried out on highspeed digitally controlled units. A tendency to produce inaccurate parts can reduce industrial interest with respect to incremental forming. Different approaches could be proposed to reduce this drawback, and a feasible and easily implemented strategy is the design of modified trajectories able to take into account both springback effects and stiffness reduction owing to specific clamping equipment. In this paper, such a strategy is pursued by integrating an on-line measuring system, composed of a digital inspector and a computer numerically controlled (CNC) open program. The geometry obtained is sampled in particular steps and an appropriate routine modifies the coordinates of the future punch path. This procedure of automatic control has been developed using an effective finite element (FE) code. An experimental design illustrates the potential use of the suggested methodology.