Unit 22 Welding Prints

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.

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

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

Welding Symbol

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

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

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

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

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

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

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

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

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

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