No part of this publication may be reproduced, or transmitted, or stored, in any form or by any means, electronic,
mechanical, photocopying, recording, or otherwise, without the prior written permission of SheetMetalWorkBook.com, Sixth
Edition Reformatted for Internet, ©2012 SheetMetalWorkBook.com
Please Donate if
you find this site
helpful.
Thank-You!
Notches
Below are some examples of basic corner notches and the
reason for using them.
The first example is a corner to corner notch. This notch
is where the inside corners of the material just touch each
other. If you are welding the corners of the box then this
type of notch will give you 100% weld penetration producing a
strong welded joint. There is also less interference with brake
tooling which makes forming slightly easier.
The next example (below) is a corner where one flange is
flush to the outside and the other flange butts into it. This
type of corner can be welded with very little or no filler rod
(fused). This weld is not very strong. With no welding this
type of corner has a nice appearance.
(Good weld penetration)
(Easier to bend less
interference)
(? = Flange - B.D. + mat. thk.)
One flange overlaps another
flange after forming.
(Note how D2 lines up with the
bottom bend deduction mold line.)
D1 = Flange - B.D. + mat. thk.
D2 = Flange - B.D
