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Advancements in robot-assisted incremental sheet hydroforming: a comparative analysis of formability, mechanical properties, and surface finish for rhomboidal and conical frustums
International Journal of Intelligent Robotics and Applications Pub Date : 2024-02-10 , DOI: 10.1007/s41315-023-00311-0
Ravi Prakash Singh , Santosh Kumar , Pankaj Kumar Singh , Md. Meraz , Sachin Salunkhe

Incremental sheet forming (ISF) is a highly versatile and flexible process for small batch production of complex sheet metal parts. Since, there is no die used in the process, the accuracy of the parts formed is an area of concern in ISF. In the current work, an experimental set-up was developed for robot assisted incremental sheet hydroforming (RAISHF) and was conducted on AA3105 to fabricate different shapes. Formability by RAISHF was found to be better than robot assisted incremental sheet forming (RAISF) due to fluid pressure from the back of the sheet which can be impart more ductility to the sheet. Additionally, a more uniform thickness was achieved by the RAISHF. A variable wall angle conical frustum (VWACF) was fabricated by each process and their formability was compared. The maximum wall angle before the onset of fracture was 73° and 64° by the process of RAISHF and RAISF, respectively. Also the thickness along the length of the cone was more uniform by RAISHF than RAISF. Further, the effect of curvature on mechanical properties and surface finish of the formed product by RAISHF was examined by fabricating a rhomboidal and conical frustums of a fixed wall angle of 45°. Tensile test and surface finish test were conducted on the samples taken from the two types of frustums. Mechanical properties and surface finish were found better of the rhomboidal frustum due to flat wall.



中文翻译:

机器人辅助增量板材液压成形的进展:菱形和截头圆锥体的成形性、机械性能和表面光洁度的比较分析

渐进式板材成型 (ISF) 是一种高度通用且灵活的工艺,适用于复杂钣金零件的小批量生产。由于该过程中不使用模具,因此所形成零件的精度是 ISF 关注的一个领域。在当前的工作中,开发了机器人辅助增量板材液压成形 (RAISHF) 的实验装置,并在 AA3105 上进行以制造不同的形状。研究发现,RAISHF 的成型性优于机器人辅助增量板材成型 (RAISF),因为来自板材背面的流体压力可以赋予板材更多的延展性。此外,RAISHF 还实现了更均匀的厚度。通过每种工艺制造了可变壁角截头圆锥体(VWACF),并比较了它们的成形性。通过RAISHF和RAISF处理,骨折开始前的最大壁角分别为73°和64°。此外,RAISHF 沿锥体长度的厚度比 RAISF 更均匀。此外,通过制造壁角固定为 45° 的菱形和圆锥形截头体,研究了曲率对 RAISHF 成型产品的机械性能和表面光洁度的影响。对两种截头体的样品进行了拉伸试验和表面光洁度试验。由于壁平坦,菱形平截头体的机械性能和表面光洁度更好。

更新日期:2024-02-10
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