2. Unit 22
Welding Prints

3. Learning Objectives Identify a welding symbol.
List the elements of a welding symbol.
Explain the meaning of a welding symbol.
Identify the basic weld symbols used in welding symbols.
Discuss other welding applications.

4. Welding Prints
Welding prints combine elements of detail and assembly drawings within one print

5. Welding Defined
Welding: Method of joining metal pieces by melting them along a joint
Weld: The junction or joint where welded parts are joined

6. Welding Symbol

7. Weld Symbol
The weld symbol attaches to the reference line of the welding symbol
The American Welding Society

8. Weld Location
Weld location is indicated by the relation of the weld symbol to the reference line

9. Weld Dimensions
Dimensions of a weld can be specified above or below the reference line or in a general note

10. Groove Welds Groove weld specifications (A) Groove angle
(B) Root opening

11. Spot Weld Examples The spot weld symbol can be annotated in many ways
(A) Diameter specified
(B) Strength specified
(C) Spacing specified (weld through also)
(D) Quantity specified

12. Supplementary Symbols
Contour symbol
(A) Flat faced
(B) Convex
(C) Convex

13. Supplementary Symbols
Weld all around
Field weld
Melt through
(A) Melt through plus reinforcement
(B) Melt through and finished by machining

14. Other Applications Slot weld Plug weld Back or backing weld
Surfacing weld symbol

15. Other Applications
Finish symbols indicate the method of finishing, not the surface texture
C = chipping
G = grinding
M = machining
R = rolling
H = hammering

16. What do you see?
Print supplied by Marathon LeTourneau Company.