Page 601 - Subyek Computer Aided Design - [David Planchard] Engineering Design with SOLIDWORKS
P. 601
Engineering Design with SOLIDWORKS® 2018 Top-Down and Sheet Metal Parts
Assume the material has no thickness. The length of the material formed into a 360°
circle is the same as its circumference.
The length of a 90° bend would be V4 of the circumference of a circle.
Circumference of a Length of a % circle =
circle= 2nR 2nR~(90/360) = rcR/2
L = 2nR
Length of 90° bend
In the real world, materials have
thickness. Materials develop different
lengths when formed in a bend
depending on their thickness.
There are three major properties which
determine the length of a bend:
• Bend radius.
• Material thickness.
• Bend angle.
R
/
The distance from the inside radius of T .
•
• .
•
the bend to the neutral bend line is •
• t
labeled 8. - · 6
f ~-············ ...................... ········· ........... , T
The symbol '8' is the Greek letter delta. ._1
The amount of flat material required to
create a bend is greater than the inside
radius and depends on the neutral bend
90° Bent
line. Flat Developed
Material
Length
The true developed flat length, L, is
True developed flat length
measured from the endpoints of the
neutral bend line.
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