welding drawings lecture 2. orientation of weld symbols if a symbol has a vertical line in it, the...
TRANSCRIPT
WELDING DRAWINGS
Lecture 2
Orientation of Weld Symbols If a symbol has a vertical line in it, the
vertical line is always on the left
All welding symbols are on page 678 fig 21.13
Field Weld
A weld that is not performed at the place of initial construction
Weld All Around
Weld extending completely around the joint
All around is assumed on joints containing round parts
Multiple Reference Lines
Indicates a sequence of operations First operation is closest to the arrow
Tail of the Welding Symbol
Used to put information for process, specifications or other reference information
Shown on page 673 fig 21.3
Contours Obtained by Welding
Flat symbol is typically horizontal above or below weld symbolConvex curves toward ref line, Concave curves away from ref line
Finishing Processes
Post weld finish to achieve contour
G-grinding R-rollingC-chipping H-hammeringM-machining
Application of contours and finishing processes
Break in Arrow Line
Used to show which part is to be prepared Points toward part that will have a process
done to it before the weld is applied (where the groove will be)
Fillet Weld
Triangular shaped weld that goes in a corner
Use for : lap jointscorner jointsT joints
Weld length and pitch
Square Groove Weld
A weld placed between the two members of a butt joint
Gap between the parts is called a root opening
V-Groove
Weld placed in a v-shaped groove between 2 parts
Double V-groove
*Root opening only appears once on symbol
Bevel Groove
One member of the joint has a groove in it
U Groove
Weld in a u shaped groove between two parts
J Groove
J shaped groove in on part of the joint