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二次旋转面在工程技术中有着广泛的应用。因此,画法几何对二次旋转面图示的讨论,占有重要的地位。当二次旋转面的轴线垂直于投影面时,作出二次旋转面的投影是比较容易的,在许多教科书和有关文献中都有详细论述。但当轴线倾斜于一个投影面时,对二次旋转面在该投影面上的投影则论述较少。本文基于用内切球作出轴线倾斜于投影面的一般旋转面的投影的原理和方法,探讨了旋转抛物面、旋转椭圆面、和旋转双曲
Secondary rotating surface in engineering has a wide range of applications. Therefore, the discussion of pictorial geometry on the illustration of quadratic surface plays an important role. Projection of the quadratic surface of rotation is relatively easy when the axis of the secondary plane of rotation is perpendicular to the projection plane and is discussed in detail in many textbooks and related literature. However, when the axis is inclined to a projection plane, the projection of the secondary rotation plane on the projection plane is discussed less. Based on the principle and method of using the inner ball to make the projection of the general rotation plane whose axis is inclined to the projection plane, the paper discusses the rotating paraboloid, spheroid,