Stamped Sheet Metal Tolerances

Precision stampings or precision stamped features on stamped parts are possible without post machining or additional manufacturing steps.

Stamped sheet metal tolerances.

If the material required to produce a metal stamping order is much less. Dimensioning standard for sheet metal part diegolgraves mechanical 21 jun 16 19 16. A normal metal stamping process creates a die cut is to drive a sharpened tool steel punch through the sheet or strip material into a die cavity where the slug or scrap is ejected. By coining or placing a small dent in the outside radius of the bend you can break up and often reverse the tensional stress that was created during deformation see figure 3 this is because the coining action pushes metal outward and changes the stress from tension to compression.

Fabricators are accustomed to idiots specifying sheet metal and weldment tolerances at pm 005. In a sheet metal design specifying hole sizes locations and their alignment is critical. Commonly used flatness tolerances for metal stamping laser and turret are shown below. Flatness tolerances for metal stamping.

It is always better to specify hole diameters that are greater than the sheet s thickness t. To the uninitiated sheet metal and plate bending looks simple enough but the truth is that it s often the most complicated process on many metal fabrication shop floors. Theoretically it shouldn t be complicated. Fabrication tolerances for dimensional variance in sheet metal and machined parts overview protocase takes great care to manufacture your electronic enclosures parts and components as accurately as possible.

Get a free quote today on your custom metal fabrication project. Below are dimensions and tolerances typical of stamped metal components. Dayton rogers is your trusted resource for sheet metal fabrication metal stamps metalforming and all your manufacturing company needs. Dimensional tolerances of metal parts manufactured by stamping should be carefully considered.

But tolerances still must take material variations into account. This method works well for the bowing up problem shown in figure 1. Photo courtesy of mate precision tooling. The tolerances shown are well suited to the progressive stamping process and thus ensure quality and cost effective parts.

Of course exceptions apply. Stippling the outside bend radius. These sizes are usually readily available as stock items and are generally the best choice when cost and delivery are a major factor. Rolling mills work from master coils and so usually have minimum order quantities somewhere in the truckload range.