How To Put A Hem On Sheet Metal

This is putting a simple hem on a curved piece of zinc with a 7ft radius.

How to put a hem on sheet metal. To bead an edge simply select that hem type in the hem feature s setup. The hem tool adds a hem to your sheet metal part at a selected edge. Step 10 repeat the last step again but this time try a different type of hem. The cad hem s angle can be adjusted past 180 degrees to create a closed teardrop or underbent to create an open hook.

On the ribbon click sheet metal tab create panel hem. In an open sheet metal part and in the graphics area select an edge as shown. To establish the inner smaller radius 90 degree bend line subtract half a bend deduction from the outside dimension of the flange. Create a bend with acute angle tooling in the metal 30 is preferable but 45 will work for some circumstances.

In sheet metal hemming means to fold the metal back on itself. In 3 d cad a hem is very easy to create. To establish the hem bend line add the two outside dimensions up to the hem then subtract half the hem elongation allowance and a full bend deduction for the inner 90 degree bend. When working with a brake press hems are always created in a two step process.

A hem provides stiffness to a design or provides a smooth rounded external edge on a part to eliminate sharp edges.