| 摘要 |
PROBLEM TO BE SOLVED: To provide a processing method for three-dimensional shape capable of creating a draft angle body without extending off the three-dimensional shape when creating the draft angle in a bossed shape projected onto a freely- curved surface. SOLUTION: A creating method for a draft angle to create the angle in a three-dimensional shape comprises a step of specifying a ridge line row, a reference plane and a plane set of the shape (S2), a step of creating a draft angle body by sweeping the ridge line row from a plane composed of the specified row to the specified reference plane (S3), a step of cutting the created draft angle body by the specified plane set (S4), and a step of creating the draft angle by performing a set operation between the draft angle as a result of cutting and the three-dimensional shape (S5). Moreover, the method is comprised to create a draft angle in the bossed shape on the three-dimensional shape by specifying the plane set on the original three-dimensional shape.
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