Dimple Operation In Sheet Metal

The process uses a pair of rolls which are designed with rows of specially shaped teeth that deform the strip creating the dimple shapes from both sides of the plain sheet prior to the traditional cold roll forming process as shown in fig.

Dimple operation in sheet metal.

The welker roll dimpler minimizes blank sticking by adding rows of small dimples to sheet metal in coil fed operations. Aluminum sheet is the easiest common. Draw dies create the part shape by controlling metal flow into a cavity and over the forming punch. The minimum distance between one dimple and another is four times the material thickness plus the inside radius of each dimple.

When dimple dies are used they are coining the sheetmetal so the harder the applied pressure the more accurate the flare will be with less metal spring back. Prevents die damage and downtime. Sheet metal design consideration dimple. This plate prevents the metal from wrinkling as it flows into the cavity.

Draw dies utilize a special pressure loaded plate or ring called a draw pad or blank holder to control the metal s flow into the cavity. Dimpled steel products are increasingly used in a wide range of applications including wall studs framing and roofing members corrugated panels vineyard posts windows and door reinforcement and many other products. Eliminates the need for expensive air knife systems.