| 摘要 |
An automatic construction system for a three-dimensional model capable of efficiently constructing the three-dimensional model. A product is divided into two portions, i.e, a head part and an under-head part. A head part shape (34) and an under-head part shape (36) are selected as the shape of the three-dimensional model, the basic dimensions of the portions are inputted, the dimensional values of the portions are calculated, and the combination of a basic shape with cut parts is selected according to a table (38). When the basic shape of the under-head part shape (36) must be changed, the dimensions of a model (40) in a basic shape are changed and a model (42) is constructed. The cut part (48) is selected and the model (42) is processed to construct a model (50), and the three-dimensional model (54) of a bolt is constructed by the combination of the model (52) of the head part shape with the model (50) of the under-head part shape.
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