A curling operation in a progressive die is best done in two stations. (Pressworking Corner) (Column)

From: Modern Machine Shop | Date: May 1, 1992| Author: Rizzo, R.J. | Copyright information

Sheet metal parts with curled edges abound everywhere. Although this topic was chosen with the apprentice tool and diemaker in mind, it reviews some basic concepts that are always worth reviewing.

In many cases, curling is done to provide safety for the user, as in kitchen utensils and related products. In others, curling performs a mechanical function, such as in hinges, flexible joints, butt-seam tubes, eyelets, and so forth (see Figure 1). Although curling has been co...

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