Patent ID: 6338000
Filing Date: 2002-01-08
Classification: G05B,G06F,G06T,Y02P,Y10S

Abstract:
A method of generating shape data with a CAD system to form a hemmed edge to be added to a design surface for a designed product, based on production technique requirements data of the product, comprising the steps of:setting up rib calculation points for forming the hemmed edge on a peripheral edge of the design surface; setting up a hypothetical surface separate from said design surface on the peripheral edge based on the production technique requirements data; determining arcs in contact with said design surface and said hypothetical surface as rib data at said rib calculation points; and generating shape data to form said hemmed edge from said rib data, wherein said shape data comprises face rib data for forming face ribs extending from said design surface to said hypothetical surface and back rib data for forming back ribs extending from said hypothetical surface to a reverse side of said design surface.