SEAT SHAPE DATA PREPARING DEVICE, SEAT SHAPE DATA PREPARING METHOD AND SEAT SHAPE DATA PREPARING PROGRAM

PROBLEM TO BE SOLVED: To quickly prepare seat shape data by a simple procedure without performing a redesign from the beginning, even if the positional relation of a 'seat' and a product surface is changed. SOLUTION: Data of a seat surface and a gradient surface is inputted (S1). A first gradient surface is created above the seat surface, the first gradient surface is coupled with the seat surface to create a first coupling surface, a second gradient surface is created below the seat surface, and the second gradient surface is coupled with the seat surface to create a second coupling surface (S3). A line of intersection of the first coupling surface, the second coupling surface and a product surface is calculated (S5). Data (S7) of the first gradient surface or the second gradient surface, data (S9) of a part of the first coupling surface or a part of the second coupling surface and data (S11) of a part of the product surface which are not required to form the 'seat' on the product surface are successively deleted. Thus, the unnecessary data is deleted, and data in which the part of the first coupling surface, the part of the second coupling surface and the part of the product surface which are left are coupled is taken as seat shape data. COPYRIGHT: (C)2003,JPO