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A shell ring can be created as a separate solid or merged with the existing one.
The section shape of a shell ring is defined by its sketch. One sketch is required to build a simple shell ring, and two sketches – to build a ruled shell ring.
Sketch contour It can be closed or open. If the contour is closed (or both contours in the case of building a ruled shell ring), the shell ring is built cut by height. The location and value of the gap are user-defined. There are different ways available to trim the flanges of the shell ring.
The arc portions of the shell ring contour can be segmented – replaced with approximating polylines.
A simple shell ring is formed by extruding a sketch in the direction perpendicular to its plane, and adding thickness to the resulting surface.
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Building a shell ring based on a closed contour
a) sketch; b) shell ring
Segments in the sketch form flat portions of the shell ring, arcs form bends of respective radii, contour corners form bends with the user-defined radius.
Lateral sides of the shell ring may be sloped. Bends that are formed in the contour corners may have a cylindrical or conical shape in the sloped shell ring.
Creating a simple shell ring...
A ruled shell ring is formed when two bases are joined by a ruled surface and thickness is added to it. Arbitrary shaped sketches and locations are used as bases.
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Building a ruled shell ring based on closed contours
a) base sketches; b) ruled shell ring
In the general case, side faces of the shell ring are ruled, however, in particular cases they can be flat, cylindrical or conical. It depends on the shape and relative location of sketches, and how the surface is split into faces. If required, default splitting can be edited.
If the adjacent faces of the ruled surface are not joined smoothly, a bend of the specified radius is automatically created at the joint. When the adjacent bends intersect, an angle relief is automatically generated.
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Example of corner relief when bends of the ruled shell ring intersect
