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For heating,
air-conditioning and ventilation applications it is often necessary to
design 3D parts consisting of two different contours. Autodesk Inventor
offers a lofting feature for this purpose.
However, models that are created with this feature cannot be unfolded as
the Inventor lofting command does not result in creating a bendable part.
For production it is, however, essential to have a precise flat pattern
calculated. data M Software now offers a unique new solution for this
requirement: The
SheetMetal Lofting feature.

The procedure is comparable to the standard lofting command in Inventor.
It differs however in the very fact that it takes the specific
requirements of sheet metal parts into account.
The user will – in any case – get a truly bendable part based on sheet
metal technology. Step by step the integrated dialogue assistant leads the
user to the final desired result. All parts that have been designed with
the SheetMetal Lofting feature can be modified by using Inventor®
commands and are later unfolded with COPRA® MetalBender Analyser·i. SheetMetal Lofting design approach:
Step 1: Design of boundary contours
First the two boundary contours (2D contours) are created with Inventor®
functionality.
The following parameters can be defined:
Selection of the boundary
contours
Definition of the cutting
gap width
Position of cutting gap on
contours
Standard setting for number
of bending edges of an arc
Automatic division of
contours, e.g. of a circle Step 2: Bending lines
In the second step the user determines the positions of the bending lines.
The corresponding elements are clearly shown in a dialog box and can be
modified at a later stage. Step 3: Calculation of 3D solid
A 3D solid is now calculated according to the defined parameters.
The following definitions can now also be made:
Material thickness (sheet
metal thickness)
Creation of a surface or
solid model
Definition of direction into
which the solid is to be extruded
Result:
Bendable part according to
sheet metal know-how and technology
All essential bending lines
are included
Reworking with Inventor®
possible
Flat pattern calculation
with CMB Analyser·i |