This paper presents a new three pass forming approach using incremental sheet forming (ISF) for the manufacture of a trumpet bell. Brass musical instruments are traditionally manufactured using artisanal methods (cutting, hammering, spinning and finishing) which are labour intensive but deliver superior quality instruments. The aim of this work was to achieve comparable levels of control using ISF. A series of 20 trials were undertaken to establish optimum set up, forming strategy and tool selection. This has resulted in the three pass approach that delivers consistent wall thicknesses within the tolerance zone and a higher component wall angle (79°) than previously achieved axially in ISF. The resulting components are evaluated using GOM scanning to set out the wall thicknesses and surface finishes achieved, and sets out future avenues for investigation in the forming of brass.

本文介绍了一种新的三道次成型方法，使用增量片材成型 (ISF) 来制造喇叭罩。传统上，铜管乐器是使用手工方法（切割、锤击、旋压和精加工）制造的，这些方法劳动密集，但能提供优质的乐器。这项工作的目的是使用 ISF 实现可比较的控制水平。进行了一系列 20 次试验，以确定最佳设置、成型策略和工具选择。这导致三道次方法在公差带内提供一致的壁厚和比以前在 ISF 中轴向实现的更高的组件壁角 (79°)。使用 GOM 扫描评估生成的组件，以列出所达到的壁厚和表面光洁度，