bend test
The flat layout or blank length of a piece of metal from which a simple L-shaped bracket 3 inches by 1 inch is to be bent depends upon the radius of the desired bend. The bracket which will require the greatest amount of material is one which has a bend radius of
1/8 inch
a piece of flat stock that is to be bent to a closed angle of 15* must be bent through an angle of
165*
(refere to figure 5) what is the length of flat A
3.7 inches
(Refer to figure 4) the length of flat A is
3.750 inches
(refere to figure 6) what is dimension D
4.182
(refere to figure 7) what is dimension F
5.936
(refere to figure 5) what is the flat layout dimension
6.8 inches
(refere to figure 6) determine the dimensions of A,B,C in the flat layout
A= .748, B= 1.496, C= 1.248
(Refere to figure 4) the amount of material required to make the 90* bend
0.3436 inches
the purpose of a joggle is to
allow clearance for a sheet or an extrusion.
A piece of sheet metal is bent to a certain radius. The curvature of the bend is referred to as the
bend radius
if it is necessary to compute a bend allowance problem and bend allowance table are not available, the neutral axis of the bend can be
found by adding approximately one-half of the stock thickness to the bend radius
unless otherwise specified, the radius of a bend is the
inside radius of the metal being formed.
The sharpest bend that can be placed in a piece of metal without critically weakening the part is called the
minimum radius of bend
When bending metal, the material on the outside of the curve stretches while the material on the inside of the curve compresses. That part of the material which is not affected by either stress is the
neutral line
The sight line on a sheet metal flat layout to be bent in a cornice or box brake is measured and marked
one radius from the bend tangent line that is placed under the brake
the most important factors needed to make a flat pattern layout are
radius, thickness, and degree of bend
When straightening members made of 2024-T4, you should
straighten cold and reinforce
on a sheet metal fitting layout with a single bend, allow for stretching by
subtracting the setback from both legs.
when a piece of aluminum alloy is to be bent using a minimum radius for the type and thickness of material
the layout should be made so that the bend will be 90* to the grain of the sheet.
