Incremental sheet metal forming (ISF) is one of the best flexible manufacturing processes used to convert a sheet metal into required final shape using tool movement. In incremental sheet metal forming process, a single pointed forming tool is allowed to move over the sheet metal as per the pre-programmed numerical control of a computer. The advantage of making any complex part without die confirms its importance in the emerging automated industries. But this process has some limitations such as less formability and high surface roughness compared to the conventional forming process. Longer processing time is another drawback of the incremental sheet forming. This paper proposes a newly designed multi-point incremental forming (MPIF) tool to avoid the drawbacks faced by industry in increasing the formability and wall angle of the sheet metal with reduced time. The sheet metal stainless steel (SS) grade 430 has been used for forming process and the outputs obtained from MPIF and single point incremental forming (SPIF) have been compared with respect to wall angle, formability, surface roughness, spring back and forming time. Grey relational analysis (GRA) has been used to find the optimal value for the various responses obtained. The analysis of variance (ANOVA) calculation method has also been used to find the factors that influence the output responses. The responses obtained by the experiment have proved that the multipoint tool results better output.

中文翻译：

---

使用GRA优化SS430板材的多点增量板材成形

增量钣金成形（ISF）是最好的柔性制造工艺之一，用于通过工具移动将钣金转换为所需的最终形状。在增量钣金成形过程中，根据计算机的预编程数控，允许单个尖头成形工具在钣金上移动。无需模具即可制造任何复杂零件的优势证实了其在新兴自动化行业中的重要性。但是，与传统的成型工艺相比，该工艺具有一些局限性，例如成型性差和表面粗糙度高。较长的处理时间是增量片材成形的另一个缺点。本文提出了一种新设计的多点增量成形（MPIF）工具，以避免工业在减少时间上增加钣金的可成形性和壁角时所面临的缺点。430级金属薄板不锈钢（SS）已用于成型工艺，并且已将MPIF和单点增量成型（SPIF）的输出在壁角，可成型性，表面粗糙度，回弹和成型时间方面进行了比较。灰色关联分析（GRA）已用于找到获得的各种响应的最佳值。方差分析（ANOVA）计算方法也已用于查找影响输出响应的因素。通过实验获得的响应已证明，多点工具可产生更好的输出。430级金属薄板不锈钢（SS）已用于成型工艺，并且已将MPIF和单点增量成型（SPIF）的输出在壁角，可成型性，表面粗糙度，回弹和成型时间方面进行了比较。灰色关联分析（GRA）已用于找到获得的各种响应的最佳值。方差分析（ANOVA）计算方法也已用于查找影响输出响应的因素。通过实验获得的响应已证明，多点工具可产生更好的输出。430级金属薄板不锈钢（SS）已用于成型工艺，并且已将MPIF和单点增量成型（SPIF）的输出在壁角，可成型性，表面粗糙度，回弹和成型时间方面进行了比较。灰色关联分析（GRA）已用于找到获得的各种响应的最佳值。方差分析（ANOVA）计算方法也已用于查找影响输出响应的因素。通过实验获得的响应证明，多点工具可产生更好的输出。灰色关联分析（GRA）已用于找到获得的各种响应的最佳值。方差分析（ANOVA）计算方法也已用于查找影响输出响应的因素。通过实验获得的响应已证明，多点工具可产生更好的输出。灰色关联分析（GRA）已用于找到获得的各种响应的最佳值。方差分析（ANOVA）计算方法也已用于查找影响输出响应的因素。通过实验获得的响应已证明，多点工具可产生更好的输出。