Method of blank design for a spin forming process

摘要

The invention relates to a method of generating a design of a blank workpiece in a computer readable form, wherein the workpiece is suitable for use in a spin forming process, to produce an article having a target shape. The target shape extends along an axis between a first end and a second end and comprises a base portion and a wall portion. The base portion includes a central flat region and a curved region bordering the central flat region. The wall portion extends from the curved region of the base portion. The method includes: determining a perimeter shape of the workpiece based on; a planar representation of the base portion defined by a plurality of perimeter points; a curvature of the planar representation at one or more perimeter points; and a length of the target shape, between the first end and the second end; and outputting the perimeter shape in the computer readable form.