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首页> 外文期刊>Journal of Manufacturing Processes >Forming study on a tailor rolled blank (TRB) structure- formability evaluation and model verification
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Forming study on a tailor rolled blank (TRB) structure- formability evaluation and model verification

机译：裁缝轧制坯料（TRB）结构 - 成型性评估和模型验证的形成研究

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摘要

Tailor rolled blank (TRB) technique, as a relatively novel configuration, is of potential to fulfill the lightweight design. The examination of TRB defects in stamping process using traditional forming limit curve (FLC) is challenging. In this paper, the forming limit surface (FLS), which considers thickness changes, was used to evaluate the formability of front longitudinal beam (FLB) with TRB structure. A numerical model was developed to study the strain distributions and thickness transition zone (TTZ) movements during the TRB forming process. The effects of tool parameters (die clearance and draw-bead) on formability and TTZ movement were investigated. Results showed that the adaptive die gaps and segmented draw-beads were required in tool design to reach a better forming quality in the formed part. Besides, TTZ movement appears to be more structural dependent because the movements near the area with transition corner were larger and suffered smaller impact from parameter changes. The measured thicknesses of typical sections from formed part agree well with those predicted by simulation. This result confirms that the simulation strain used in formability evaluation was relatively reliable.
机译：裁缝滚动坯料（TRB）技术，作为相对新颖的配置，具有潜力能够实现轻质设计。使用传统成型极限曲线（FLC）对冲压过程进行TRB缺陷的检查是具有挑战性的。在本文中，考虑厚度变化的成形限位表面（FLS）用于评估与TRB结构的前纵梁（FLB）的可成形性。开发了一种数值模型，以研究TRB形成过程中的应变分布和厚度过渡区（TTZ）运动。研究了刀具参数（模具间隙和胎圈）对成形性和TTZ运动的影响。结果表明，在工具设计中需要自适应模具间隙和分段的拉伸珠子，以达到所形成的部分的更好的成形质量。此外，TTZ运动似乎更加结构依赖性，因为具有过渡角的区域附近的运动更大，并且从参数变化遭受较小的影响。来自成形部分的典型部分的测量厚度与通过模拟预测的那些孔很好地吻合。该结果证实，可成形性评估中使用的模拟应变相对可靠。

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