Transcript Document

Designing for welding
The primary importance of welding is to
unite various pieces of metal so that
they will operate as a unit structure to
support the loads to be carried
Welding processes include arc welding,
gas welding, and resistance welding (40
total processes exist)
Gas & Arc Welding
Most common form is oxyacetylene welding
gets heat from the burning of flammable
gases. It is slow compared to other modern
welding methods so is used primarily for
repair & maintenance
Arc welding is the major industrial welding
process-heat is generated by an electric arc
struck between a welding electrode, or rod,
and the workpiece. The arc is hot and
melting and solidification of the weld metal
occurs rapidly.
Resistance welding
Widely used especially for mass
production work
Heat is created from resistance losses
as a high amperage current is sent
across a joint between 2 mating
surfaces
Plug welding
A plug weld refers to joining two pieces
by welding through a hole in one of the
pieces*
WELDING DRAWINGS
TYPE OF JOINT
APPLICABLE WELDS
FILLET
PLUG
SLOT
SQUARE GROOVE
BEVEL GROOVE
J-GROOVE
FLARE BEVEL GROOVE
SPOT
PROJECTION
SEAM
BASIC WELDING JOINTS
WELDING DRAWINGS
TYPE OF JOINT
APPLICABLE WELDS
SQUARE GROOVE
V-GROOVE
BEVEL GROOVE
U-GROOVE
J-GROOVE
FLARE V-GROOVE
FLARE BEVEL GROOVE
EDGE FLANGE
BASIC WELDING JOINTS
WELDING DRAWINGS
TYPE OF JOINT
APPLICABLE WELDS
FILLET
SQUARE GROOVE
V-GROOVE
BEVEL GROOVE
U-GROOVE
J-GROOVE
FLARE V-GROOVE
FLARE BEVEL GROOVE
EDGE FLANGE
CORNER FLANGE
SPOT
PROJECTION
SEAM
BASIC WELDING JOINTS
WELDING DRAWINGS
TYPE OF JOINT
APPLICABLE WELDS
FILLET
PLUG
SLOT
BEVEL GROOVE
J-GROOVE
FLARE BEVEL GROOVE
SPOT
PROJECTION
SEAM
BASIC WELDING JOINTS
WELDING DRAWINGS
TYPE OF JOINT
APPLICABLE WELDS
PLUG
SLOT
SQUARE GROOVE
BEVEL GROOVE
V-GROOVE
U-GROOVE
J-GROOVE
BASIC WELDING JOINTS
EDGE FLANGE
CORNER FLANGE
SPOT
PROJECTION
SEAM
EDGE
The difference between Weld
symbol & Welding symbol…*
Weld symbol indicates
the type of weld
Welding symbol is a
method of
representing the weld
on drawings. It
includes
supplementary
information & consists
of the following 8
elements.








Reference line
Arrow
Basic weld symbol
Dimension and other
data
Supplementary
symbols
Finish symbols
Tail
Specification,
process or other
reference
WELDING DRAWINGS
WELD TERMINOLOGY
Location significance of Arrow*
Arrow side- for fillet, groove, flanged
weld symbols the arrow connecting the
welding symbol reference line to one
side of the joint
Other side – the side opposite the
arrow side
Both sides
WELDING DRAWINGS
WELDING SYMBOLS
WELDING DRAWINGS
WELD TERMINOLOGY
WELDING DRAWINGS
COMPARISON OF A CAST SHAFT SUPPORT
WITH A WELDED STEEL SHAFT SUPPORT