Working with Sheet Metal Parts - Inventor 2013 and Inventor LT 2013 Essentials - page 238

8. After the dialog box opens, click the long edge of the short face
(Figure 10.24).

9. Use the Type drop-down to set the option to Teardrop.

10. Set the Radius value to 0.8 mm, as shown in Figure 10.24, and click
OK to place the hem.

FIGURE 10.24 Hems can be complex features but are
added easily.

The Hem tool's four options should cover almost any requirement for fabrica-
tion. Now, you can focus on making your components suitable for the manufac-
turing process.

Preparing the Part for Manufacture

In some cases, you might choose to send data for the finished part to an exter-
nal resource and allow that person to calculate the material needed to create the
part. Inventor has the capability to develop a flat pattern for a part. You can also
edit flat patterns to add material that isn't included in the folded part.

Building the Flat Pattern
A flat pattern for a part includes calculations for the stretch of the material as it
is formed. The type, thickness, and bend radius can affect this calculation. It is
also common for companies to build in extra material to cause deformation, and
this is done by modifying the flat pattern.

Certification
Objective

1. Verify that the 2013 Essentials project file is active, and then open
c10-11.ipt from the Parts/Chapter​10 folder.