Note: Bend radius of zero is achievable for. ALUMINUM (BARE & CLAD) Minimum Bend Radii Manufacturing comments almost always results in less expensive, more manufacturability, better parts and ultimately designs. Submit preliminary designs to manufacturing for recommendations and review. General: Concurrent design processes almost always reduces iterations between design and manufacturing. The grain can be seen by viewing off the shelf sheet and noting the direction of visible lines running end to end. Grain direction is usually specified on stainless steel and other hard materials when it is necessary to maintain minimum bend radius or to control spring back on parts with large radius forms. Be careful not to confuse this with surface finishes produced by grinding of other finishing operations. Grain Direction A 'grain' is formed in metal in the direction in which the sheet is rolled at the mill. Commercial sheet metal radius are created with less concern for stresses created during forming and radii can approach zero (sharp internal corner) for many thin sheet metal gages. The bend radii listed are standard minimum for manufacturing for aerospace and space applications. Minimum Bend Radii: The minimum bend radii data contained within the given charts are measured to the inside of the bend. Defining the primary datum by datum targets in a retrained condition is preferred. In general the primary datum should have some type of form specified. 005' per inch is the best that can be achieved without secondary individual checking and straightening. If there is a rule of thumb, a flatness tolerance of. 020 for general, and tolerance functional areas as needed.įlatness: Flatness specifications are applied with perfect form not required at maximum material condition. Linear tolerances should be held as loose as possible. Practical tolerances vary according to the design requirements. Tight tolerances raise the cost of manufacturing significantly. Tolerances: Sheet metal tolerances should not be tighter than necessary to make the part functional. Force to Shear or Pierce Sheet Metal Equation.Sheet Metal Manufacturing and Services | Sheet Metal Fabricators Manufacturing Knowledge Menu | Sheet Metal Knowledge Menu Sheet Metal Design, Mechanical Tolerances and Overview

Sheet metal bend table