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首页> 外文期刊>International Journal of Production Research >Stochastic assessment considering process variation for impact of welding shrinkage on cost of ship production
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Stochastic assessment considering process variation for impact of welding shrinkage on cost of ship production

机译：考虑工艺变化对焊接收缩率对船舶生产成本影响的随机评估

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摘要

Since ship hull blocks are constructed by assembling numerous intermediate parts, relatively small changes in their dimensions can easily accumulate to cause serious reworking during the block erection stage, as well as deteriorate the productivity in ship production industry. One of the major dimensional accuracy control activities in shipbuilding is shrinkage margin design, by which an optimal length of excess edge is assigned to plates, in order to compensate for welding shrinkage and thus minimise reworking due to shrinkage. This paper presents a stochastic methodology for a quantitative assessment procedure of welding shrinkage on production cost in shipbuilding. This reworking cost evaluation procedure includes not only the prediction of a nominal shrinkage profile, but also a statistical cost estimation process for shrinkage variation. The formulation to predict total rework cost is suggested to be a combination of nominal shrinkage profile, process variation and quality loss functions for each rework region. Also, this approach investigates the relationship between the shrinkage margin and the predicted rework cost, in case of different process variations for a 15 m × 15 m ship block model. It also presents an optimal shrinkage margin calculation procedure for ship designers in order to minimise the impact of dimensional variation due to welding shrinkage, on productivity.
机译：由于船体砌块是通过组装许多中间零件而构成的，因此，它们的尺寸相对较小的变化很容易累积，从而在砌块安装阶段引起严重的返工，并降低了船舶生产行业的生产率。造船业的主要尺寸精度控制活动之一是收缩余量设计，通过该余量余量可以为板材分配最佳的多余边缘长度，以补偿焊接收缩，从而最大程度地减少由于收缩引起的返工。本文提出了一种随机方法，用于定量评估造船业焊接收缩对生产成本的影响。该返工成本评估程序不仅包括对标称收缩曲线的预测，还包括针对收缩变化的统计成本估算过程。建议用于预测总返工成本的公式应是每个返工区域的标称收缩曲线，工艺变化和质量损失函数的组合。同样，在15 m×15 m船体模型的工艺变化不同的情况下，这种方法还可以研究收缩率与预计返工成本之间的关系。它还为船舶设计人员提供了一种最佳的收缩裕量计算程序，以最大程度地减少由于焊接收缩引起的尺寸变化对生产率的影响。

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  • 来源
    《International Journal of Production Research》 |2014年第20期|6076-6091|共16页
  • 作者

    Heeyoung Heo; Hyun Chung;

  • 作者单位

    Division of Ocean Systems Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea,Institute of Industrial Technology, SAMSUNG Heavy Industries, Geoje, Republic of Korea;

    Division of Ocean Systems Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    dimensional accuracy; welding; shrinkage; variation; dimensional quality;

    机译：尺寸精度;焊接;收缩变异;尺寸质量;

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