Dfm For Sheet Metal

7 sheet metalworking analysis dfma dfm concurrent costing boothroyd dewhurst inc.

Dfm for sheet metal.

Dfm is particularly important for sheet metal fabrication where small design flaws could result in cracks tears or unwanted bends in the metal. This is an example of dfm guidelines for sheetmetal fabrication. Avoid large sheet metal parts with small bent flanges. Engineers designing sheet metal enclosures and assemblies often end up redesigning them so they can be manufactured.

It is always better to specify hole diameters that are greater than the sheet s. Basic dfm guidelines for sheet metal most dfm guidelines are intended to keep the sheet metal from warping tearing or cracking. In low carbon steel sheet metal the minimum radius of a bend should be one half the material thickness or 0 80 mm. While today s mechanical engineering programs produce engineers with high aptitudes typically the programs neglect to teach sheet metal design for manufacturability altogether.

In fact research suggests that manufacturers spend 30 to 50. Bends should be toleranced plus or minus one half degree at a location adjacent to the bends. This can happen either during the manufacturing process or when the product is in use. Design for manufacturability sheet metal guidelines bends for the ease of manufacturing multiple bends on the same plane should occur in the same direction.

Sheet metal design basics for dfm design for manufacturability is now a common concept in many industries including the sheet metal design sector. Dfm tips for sheet metal in a sheet metal design specifying hole sizes locations and their alignment is critical. The compound die stamping process is highlighted on the process chart. Avoid large sheet metal parts with small bent flanges.

Design for manufacturing dfm is a philosophy used to create viable designs that are easy to manufacture. Engineers can turn out sheet metal designs that are both highly functional and easy to make by following design for manufacturing principles. Sheet metal design basic fundamentals make manufacturing a sure thing instead of crossing your fingers that everything will turn out ok. These trends are rising creating a knowledge gap that results in sheet metal components that companies find increasingly difficult to manufacture.

In general leave enough space between design features so that slight variations in the metal will not impact the final structure. For the ease of manufacturing multiple bends on the same plane should occur in the same direction.