6.1.4.3.1. Arc Revolution Surface

It allows the user to create an arc-revolution surface for defining Sphere To Arc Revolution Contact easily.

6.1.4.3.1.1. Modeling Options

The user can create a surface geometry by the following procedure.

  • Point, Direction, Point, Angle, Point, Direction, Angle

    • Point: Selects a point to define the arc center.

    • Direction: Defines an axis direction for generating the arc.

    • Point: Selects a point to define the start point of the arc.

    • Angle: Defines an angle of the arc.

    • Point: Selects a point to define the center point of the arc revolution.

    • Direction: Defines an axis direction of the arc revolution.

    • Angle: Defines a revolution angle.

  • Circle, Point, Direction, Angle

    • Circle: Selects a circular arc for the arc revolution.

    • Point: Selects a point to define the center point of the arc revolution.

    • Direction: Defines an axis direction of the arc revolution.

    • Angle: Defines a revolution angle.

    • Point: This option makes Arc Revolution directly. The user can modify its properties.

    • Point: Selects a point to define the center point of the arc revolution. And then an arc-revolution surface is created as the default value.

6.1.4.3.1.2. Properties

The user can modify the geometry information using the Arc Revolution Geometry property page.

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Figure 6.61 Arc Revolution Surface property page

  • Arc Radius: Defines the radius of the arc.

  • Arc Start Angle: Defines the start angle of the arc. The start angle of the arc is toward +Y axis.

  • Arc End Angle: Defines the end angle of the arc.

  • Spin Radius: Defines the radius of the arc revolution. It is toward +Z axis.

  • Spin Start Angle: Defines the start angle of the arc revolution. The start angle of the arc is toward +X axis.

  • Spin End Angle: Defines the end angle of the arc revolution.

  • Vertical Offset: Defines a offset distance to Z axis.

  • Open Face: Define a fan-shaped surface on Spin start angle and/or Spin end angle. The face surface is generated when the check box is unchecked.

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    Figure 6.62 Dimensions

  • Helix Curve: If the user checks this option, then the arc center curve is defined on a helix curve.

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    Figure 6.63 A center position on the generated helix curve

  • Pitch: Defines the pitch length of the helix center curve.

  • Total Depth: Defines the total depth of the helix center curve.

  • Rotational Direction: CCW(Counterclockwise), and CW(Clockwise) can be available.

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    Figure 6.64 Definitions of Pitch, Total Depth, and Rotational Direction of the Helix Curve

  • Arc Center Offset: Defines additional options of the Helix Curve.

  • Expected CP Angle (Degree): Defines a negative direction of center offset. The angle means the definitions of the expected Contact Point.

  • Offset Distance: Defines an offset length in order to define a center point of a real arc-curve.

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    Figure 6.65 Definitions of Expected CP Angle and Offset Distance of the Arc Center Offset option of the Helix Curve

Note

The Gothic-Arch surface is not generated directly. It needs to assemble two Arc-Revolution Surfaces using Helix and Arc Center Offset options.

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