刀片间隙过大时剪切机床变形的数值分析

Q4 Chemical Engineering

Applied and Computational Mechanics Pub Date : 2021-04-01 DOI:10.22055/JACM.2020.35301.2623

Fotios Bantes, G. Vosniakos, P. Kostazos

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引用次数: 1

摘要

用于金属板的剪切机可能会在增加刀片间隙的情况下意外操作。使用具有显式求解器的商用有限元软件对典型案例进行了研究。导致机器结构弹性变形的载荷是由正在加工的金属板的塑性变形引起的，其行为由修改的Johnson-Cook定律建模。由于相当大的侧向力，与正常间隙相比，间隙过大会使机器过载。结果，剪切机和机器的底座发生振荡变形，片材部分剪切，大部分弯曲。这样的分析有助于设计者理解机床在极端情况下的结构问题，并适当地修改设计。

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Numerical Analysis of the Deformation of a Shearing Machine Tool under Excessive Blade Clearance

Guillotine shearing machines for metal sheet may be inadvertently operated at increased blade clearance. Typical cases were studied using commercially available finite element software with an explicit solver. Loads causing elastic deformation to the machine structure arise from plastic deformation of the sheet metal being processed, its behavior being modelled by modified Johnson-Cook law. Excessive clearance was found to overload the machine considerably compared to normal clearance, owing to considerable lateral forces. As a result, the guillotine and much less so the base of the machine, undergo oscillatory deformation and the sheet is partly sheared and mostly bent. Such analysis helps the designer understand structural issues of the machine tool in extreme situations and modify the design appropriately.

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来源期刊

Applied and Computational Mechanics Engineering-Computational Mechanics

CiteScore

0.80

自引率

0.00%

发文量

审稿时长

14 weeks

期刊介绍： The ACM journal covers a broad spectrum of topics in all fields of applied and computational mechanics with special emphasis on mathematical modelling and numerical simulations with experimental support, if relevant. Our audience is the international scientific community, academics as well as engineers interested in such disciplines. Original research papers falling into the following areas are considered for possible publication: solid mechanics, mechanics of materials, thermodynamics, biomechanics and mechanobiology, fluid-structure interaction, dynamics of multibody systems, mechatronics, vibrations and waves, reliability and durability of structures, structural damage and fracture mechanics, heterogenous media and multiscale problems, structural mechanics, experimental methods in mechanics. This list is neither exhaustive nor fixed.