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首页> 外文期刊>ISIJ international >Cylindrical Cup Manufacturing Using 12 mm Thick Circular Blanks of AISI 1040 Graded Medium Carbon Steel: an Innovative Approach
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Cylindrical Cup Manufacturing Using 12 mm Thick Circular Blanks of AISI 1040 Graded Medium Carbon Steel: an Innovative Approach

机译：使用AISI 1040梯度中碳钢12 mm厚的圆形毛坯制造圆柱杯的创新方法

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In this paper processing effects were studied while 12 mm thick circular blanks of hardened-tempered AISI 1040 graded medium carbon steel, applied in cylindrical cup manufacturing by a new modified processing route as an innovative approach. The processing route mainly consisted of pre-forming of flat blanks to a little draw in shape, followed by multistage drawing without blank-holder. The wall ironing was purposefully accompanied with deep drawing by ensuring suitable die-punch design to reduce wall thickness as well as earing tendency on cup edges. Thus, evolution of cup dimensions and quality, wall thickness distribution profiles, drawability and ironability parameters, punch force history, hardness distribution profiles, strain distribution profiles, spring back tendency by Demeri split ring test, and microstructures of cup wall zones were discussed.With appropriate heat treatment cycle, the steel showed a good combination of strength-ductility-formability and thus indicated its moderate drawability with high strength applications, i.e. up to ~634 MPa. The multistage cup drawing process feasibility was confirmed by manufacturing of >50 mm long cylindrical cups with uniform wall thickness and without any common forming defect. The microstructure study of cup walls also further substantiated the process feasibility. Moreover, the data pertaining to strain distribution profiles and spring back tendency of cups were shown for the process engineers to optimise the process and draw tool design, as a future scope of work.
机译：在本文中，研究了将硬化处理的AISI 1040梯度中碳钢制成的12毫米厚的圆形坯料的加工效果，该坯料通过一种新的改良加工路线作为创新方法应用于圆柱杯的制造。加工路线主要包括将扁平毛坯预成型为少许拉拔形状，然后进行不带毛坯支架的多阶段拉拔。通过确保适当的冲模设计以减少壁厚以及杯边缘的耳痕倾向，壁式熨烫有目的地伴随着深冲。因此，讨论了杯尺寸和质量，壁厚分布轮廓，可拉伸性和可铁性参数，冲压力历史，硬度分布轮廓，应变分布轮廓，通过Demeri裂环试验的回弹趋势以及杯壁区域的微观结构的演变。在适当的热处理周期下，钢表现出强度-延性-成形性的良好组合，因此表明其具有中等强度的延展性和高强度应用，即高达〜634 MPa。通过制造壁厚均一且没有任何常见成型缺陷的> 50 mm长的圆柱杯，证实了多阶段杯子拉伸工艺的可行性。杯壁的微观结构研究也进一步证实了该工艺的可行性。此外，还显示了与应变分布曲线和杯的回弹趋势有关的数据，供工艺工程师优化工艺和绘制工具设计，作为未来的工作范围。

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