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You can fold a sheet part by a straight line relative to the outer or inner flat face of this part. The specified line and face are a bend base line and a bend base face.
You can use the following as the bend base line:
•a segment of the sketch built on the outer or inner flat face of the sheet solid,
•a rectilinear edge of the mass element or surface,
•segment of the broken line,
•an auxiliary axis.
The construction result depends on the relative position of the base face and the bend base line. As a general rule: a portion of the sheet part to which a base face belongs, or a portion of the base face intersecting the bend base line or its extension will be folded.
The Figures show variants of bends by line. In all examples, a top flat face of the sheet part is used as the base face; the bend base line is shown as thick.
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c) |
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Dependence of the bend construction result on the base line position
a), c) variants of the position of the bend base line,
b), d) respective design results
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b) |
Bend of the part with a hole:
a) position of the bend base line, b) construction result
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A construction axis is infinite. Therefore, when selecting an axis as the bend base line it is irrelevant whether the representing segment has common points with the base face. For correct construction of the bend, it is sufficient if the axis extension has common points with the base face. |
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a) |
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Using an auxiliary axis as the bend base line
a) position of the axis, b) construction result
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If a segment, edge or polyline segment is used as the bend base line, and a face to be folded has a complex shape, for correct construction of the bend it is recommended to position the bend baseline in such a way so that it directly goes along all portions of the face that have to be folded. |
See Also
