| 摘要 |
<p>A method of forming data of a composite curved surface maintaining high precision and quickly. After a part program is input, there are input via a keyboard reference curves (BC11, BC12, BC21, BC22) that specify first and second curved surfaces (SS1, SS2) which form a composite curved surface (SS) and data that represent operation curves (DC11, DC12, DC21, DC22). Then, a processor (102) divides by cut pitches (b1, b2) the operation curves and an intermediate sectional curve (M) that is obtained by dividing the reference curves related to the curved surfaces by cut pitches (a1, a2) designated in the part program. The processor then calculates coordinate positions (PT'(x, y, z)) at four apexes of each of many quadrilateral tiny planes (PT) constituting the curved surface that is obtained, and stores the calculated results, i.e., mesh data representing the curves in the memory. Thus, there is formed a composite curved surface consisting of two mesh data.</p> |
