论波浪形刀具路径策略对增量板材成形几何精度的影响

IF 3.3 Q2 ENGINEERING, MANUFACTURING
Thomas Bremen, David Benjamin Bailly
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引用次数: 0

摘要

在增量式板材成形(ISF)中,几何精度仍然是一项挑战,只有在特定应用中才能解决。ISF 几何缺陷的内在机理非常复杂,至今仍未完全明了。尽管如此,对这一过程的认识仍在不断发展。例如,最近的研究表明,残余应力产生的弯矩如何影响几何精度。很明显,与主刀具路径方向平行的轴产生的弯矩占主导地位。在此基础上,本文研究了线性和平行刀具路径会导致残余弯矩沿共同轴线不利累积的假设,以及波浪形刀具路径能否减少这种累积效应。因此,所述研究调查了新型路径策略对残余弯矩和由此产生的几何偏差的影响。路径策略基于波形路径线,而曲率则在板材平面内。研究重点是在最短边缘夹紧的矩形板材和对回弹敏感的零件几何形状。实验和数值研究表明,与传统路径策略相比,某些研究路径策略对几何偏差有明显的积极影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On the Influence of Wave-Shaped Tool Path Strategies on Geometric Accuracy in Incremental Sheet Forming
In incremental sheet forming (ISF), the geometrical accuracy is still a challenge that is only solved for specific applications. The underlying mechanisms of geometrical defects in ISF are very complex and still not fully understood. Nevertheless, the process understanding is constantly evolving. Recent work has shown, for example, how bending moments resulting from residual stresses affect geometric accuracy. It has become clear that resulting bending moments with an axis parallel to the main tool path direction are dominant. Based on that, the current paper investigates the hypothesis that linear and parallel tool paths lead to an unfavourable accumulation of residual bending moments along a common axis, and whether this accumulation effect can be reduced by wave-shaped tool paths. Thus, the described research investigates the influence of novel path strategies on the residual bending moments and the resulting geometrical deviations. The path strategies are based on wave-shaped path lines, whereas the curvature is within the sheet plane. The investigations focussed on a rectangular sheet that is clamped at its shortest edges and a part geometry-sensitive to springback. Experimental and numerical investigations show a significantly positive influence of some investigated path strategies on the geometric deviation, compared to a conventional path strategy.
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来源期刊
Journal of Manufacturing and Materials Processing
Journal of Manufacturing and Materials Processing Engineering-Industrial and Manufacturing Engineering
CiteScore
5.10
自引率
6.20%
发文量
129
审稿时长
11 weeks
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