5 Mistakes to avoid when drafting sheet metal parts
Sheet metal fabrication is a process that is highly dependent on sheet metal fabrication drawings. Shop floor engineers and machine operators read the drawings and make informed decisions. Slight deviations in interpreting the geometry could result in heavy losses. To avoid project overheads and losses, check out these five CAD drafting mistakes for drafting sheet metal parts.
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#sheetmetaldesign #metalproducts #sheetmetalfabricationdrawings #caddrafting
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Sheet metal part drawing and drafting need minute detailing as metal thickness, type and
fabrication process have a significant effect on the part geometry. Here are five mistakes a
CAD drafter must avoid while developing drawings for sheet metal fabricators
(1) overlooking bend feature
ors EE [Solution |
Not considering K-factor It will lead to spring back Based on material type,
when there is a bend in effect resulting in part failure use appropriate value of
sheet metal part and waste of raw material K-factor
2) Cuts & Holes near bend lines
Punching holes close to Part will deform and may Maintain a distance of 4T,
the axis about which the fail in the press break [T = sheet thickness] to
part bends avoid tearing
(3) 90° curve at corners
oT Erm | Gem
Designing a perfectly Tool radius is imprinted on Calculating internal & external
perpendicular bend the sheet metal part and it bend radius. The most
without considering tool will result in deviation from common value for internal
radius ideal conditions bend radius is 0.030 in
i] | [Wa
4) Not considering grain direction
IIgs Effect ] EIT
Bending parallel to the Sheet is the strongest when Bending the part
grain direction while bent against the grain perpendicular to grains
cold-roling in a press direction, requires more power, for stronger and
brake & results in cracks at bend smoother bend
Nv ol KZ
JEL — —— 2?
@ Designing for weldments
ITS EES EIT
Designing weldments If the space between two Keep min. distance of a
close to each other or not consecutive welds is not spot-weld diameter (D) plus one
leaving minimum sufficient, the heat causes the | bend radius (D + R) between the
clearance metal to meit & shunting occurs electrode and the form
< L J L
CAD drafters at Hitech CADD Services consider these design aspects along with
many more to help you save costs, reworks, time, and raw material
Get in touch with us today for perfect sheet metal CAD drafting
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