Stamped Sheet Metal Tolerances

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.

Stamped sheet metal tolerances.

Most experienced metal stamping manufacturers should be able to achieve 010 for most features. This method works well for the bowing up problem shown in figure 1. Of course exceptions apply. If the material required to produce a metal stamping order is much less.

It is always better to specify hole diameters that are greater than the sheet s thickness t. Below are dimensions and tolerances typical of stamped metal components. 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. Precision stampings or precision stamped features on stamped parts are possible without post machining or additional manufacturing steps.

Cutting clearances between the punch and die are closely defined and specified in the die design stage based on the requirement of the part. Theoretically it shouldn t be complicated. Commonly used flatness tolerances for metal stamping laser and turret are shown below. Flatness tolerances for metal stamping.

The tolerances shown are well suited to the progressive stamping process and thus ensure quality and cost effective parts. Photo courtesy of mate precision tooling. Get a free quote today on your custom metal fabrication project. In a sheet metal design specifying hole sizes locations and their alignment is critical.

Fabricators are accustomed to idiots specifying sheet metal and weldment tolerances at pm 005. These sizes are usually readily available as stock items and are generally the best choice when cost and delivery are a major factor. 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. 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.

But tolerances still must take material variations into account. Dayton rogers is your trusted resource for sheet metal fabrication metal stamps metalforming and all your manufacturing company needs. Stippling the outside bend radius. Rolling mills work from master coils and so usually have minimum order quantities somewhere in the truckload range.