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