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Material formability at cold upsetting of cylinder by different plates as a base for metal forming technology design

机译:圆柱冷up锻时的材料可成形性,通过不同的板作为金属成形技术设计的基础

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摘要

Upsetting of cylinder by flat dies is one of the elementary bulk metal forming operation. But, upsetting of cylinder can also be performed by the dies different than flat, which influences the stress-strain state and material formability. This paper describes the formability analysis at cold upsetting of cylinder and hollow cylinder by different plates (flat plates, hollow plates and hollow plates whit concentric channels). The aim of this investigation is determination of influences of die and workpiece geometry on stress - strain state and material formability. The obtained results are integrated in formability limit diagram, which represents relationship between limit strain (φ_(cl)) and stress indicator (β). Experimental investigations have been performed on steel specimens C4146 (EN: 100Cr6). The determined diagram is a base for metal forming technology design, as it enables to predict damages of material structure during plastic deformation.
机译:通过平模使圆柱体setting粗是基本的大块金属成形操作之一。但是,气缸的by粗也可以通过与平模不同的模具来进行,这会影响应力应变状态和材料可成形性。本文介绍了通过不同的平板(平板,空心板和空心板和同心通道)对圆柱体和空心圆柱体进行冷up锻时的可成形性分析。这项研究的目的是确定模具和工件几何形状对应力-应变状态和材料可成型性的影响。将获得的结果集成到可成型性极限图中,该图表示极限应变(φ_(cl))和应力指标(β)之间的关系。已经对C4146钢样本(EN:100Cr6)进行了实验研究。确定的图表是金属成型技术设计的基础,因为它可以预测塑性变形期间材料结构的损坏。

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